/* * * The contents of this file are subject to the Mozilla Public License * Version 1.1 (the "MPL"); you may not use this file except in * compliance with the MPL. You may obtain a copy of the MPL at * http://www.mozilla.org/MPL/ * * Software distributed under the MPL is distributed on an "AS IS" basis, * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the MPL * for the specific language governing rights and limitations under the * MPL. * * Alternatively, the contents of this file may be used under the * terms of the GNU Library General Public License (the "LGPL"), in * which case the provisions of the LGPL are applicable instead of * those above. If you wish to allow use of your version of this file * only under the terms of the LGPL and not to allow others to use * your version of this file under the MPL, indicate your decision by * deleting the provisions above and replace them with the notice and * other provisions required by the LGPL. If you do not delete the * provisions above, a recipient may use your version of this file * under either the MPL or the LGPL. */ /* * This code is derived from GdkRgb. * For more information on GdkRgb, see http://www.levien.com/gdkrgb/ * Raph Levien */ /* Ported by Christopher Blizzard to Xlib. With permission from the * original authors and the copyright holders of this file, the * contents of this file are also redistributable under the terms of * the Mozilla Public license. For information about the Mozilla * Public License, please see the license information at * http://www.mozilla.org/MPL/ */ /* This code is copyright the following authors: * Raph Levien * Manish Singh * Tim Janik * Peter Mattis * Spencer Kimball * Josh MacDonald * Christopher Blizzard * Owen Taylor * Shawn T. Amundson */ #include #if HAVE_CONFIG_H # include # if STDC_HEADERS # include # include # include # endif #else # include # include #endif #define ENABLE_GRAYSCALE /* include this before so that we can get endian definitions if they are there... */ #include "gdk-pixbuf-xlibrgb.h" #include "gdk-pixbuf-xlib-private.h" #ifndef MIN #define MIN(a, b) (((a) < (b)) ? (a) : (b)) #endif #ifndef MAX #define MAX(a, b) (((a) > (b)) ? (a) : (b)) #endif typedef enum { LSB_FIRST, MSB_FIRST } ByteOrder; typedef struct _XlibRgbInfo XlibRgbInfo; typedef void (*XlibRgbConvFunc) (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap); /* Some of these fields should go, as they're not being used at all. Globals should generally migrate into here - it's very likely that we'll want to run more than one GdkRgbInfo context at the same time (i.e. some but not all windows have privately installed colormaps). */ struct _XlibRgbInfo { Display *display; Screen *screen; int screen_num; XVisualInfo *x_visual_info; Colormap cmap; XColor *cmap_colors; Visual *default_visualid; Colormap default_colormap; unsigned long *color_pixels; unsigned long *gray_pixels; unsigned long *reserved_pixels; unsigned long red_shift; unsigned long red_prec; unsigned long blue_shift; unsigned long blue_prec; unsigned long green_shift; unsigned long green_prec; unsigned int nred_shades; unsigned int ngreen_shades; unsigned int nblue_shades; unsigned int ngray_shades; unsigned int nreserved; unsigned int bpp; unsigned int cmap_alloced; double gamma_val; /* Generally, the stage buffer is used to convert 32bit RGB, gray, and indexed images into 24 bit packed RGB. */ unsigned char *stage_buf; XlibRgbCmap *gray_cmap; Bool dith_default; Bool bitmap; /* set true if in 1 bit per pixel mode */ GC own_gc; /* Convert functions */ XlibRgbConvFunc conv; XlibRgbConvFunc conv_d; XlibRgbConvFunc conv_32; XlibRgbConvFunc conv_32_d; XlibRgbConvFunc conv_gray; XlibRgbConvFunc conv_gray_d; XlibRgbConvFunc conv_indexed; XlibRgbConvFunc conv_indexed_d; }; static Bool xlib_rgb_install_cmap = FALSE; static int xlib_rgb_min_colors = 5 * 5 * 5; static Bool xlib_rgb_verbose = FALSE; #define IMAGE_WIDTH 256 #define STAGE_ROWSTRIDE (IMAGE_WIDTH * 3) #define IMAGE_HEIGHT 64 #define N_IMAGES 6 static XlibRgbInfo *image_info = NULL; static XImage *static_image[N_IMAGES]; static int static_image_idx; static unsigned char *colorcube; static unsigned char *colorcube_d; static unsigned long xlib_get_prec_from_mask(unsigned long val) { unsigned long retval = 0; unsigned int cur_bit = 0; /* walk through the number, incrementing the value if the bit in question is set. */ while (cur_bit < (sizeof(unsigned long) * 8)) { if ((val >> cur_bit) & 0x1) { retval++; } cur_bit++; } return retval; } static unsigned long xlib_get_shift_from_mask(unsigned long val) { unsigned long cur_bit = 0; /* walk through the number, looking for the first 1 */ while (cur_bit < (sizeof(unsigned long) * 8)) { if ((val >> cur_bit) & 0x1) { return cur_bit; } cur_bit++; } return cur_bit; } static int xlib_rgb_cmap_fail (const char *msg, Colormap cmap, unsigned long *pixels) { unsigned long free_pixels[256]; int n_free; int i; #ifdef VERBOSE printf ("%s", msg); #endif n_free = 0; for (i = 0; i < 256; i++) if (pixels[i] < 256) free_pixels[n_free++] = pixels[i]; if (n_free) XFreeColors(image_info->display, cmap, free_pixels, n_free, 0); return 0; } static void xlib_rgb_make_colorcube (unsigned long *pixels, int nr, int ng, int nb) { unsigned char rt[16], gt[16], bt[16]; int i; colorcube = malloc(sizeof(unsigned char) * 4096); memset(colorcube, 0, (sizeof(unsigned char) * 4096)); for (i = 0; i < 16; i++) { rt[i] = ng * nb * ((i * 17 * (nr - 1) + 128) >> 8); gt[i] = nb * ((i * 17 * (ng - 1) + 128) >> 8); bt[i] = ((i * 17 * (nb - 1) + 128) >> 8); } for (i = 0; i < 4096; i++) { colorcube[i] = pixels[rt[i >> 8] + gt[(i >> 4) & 0x0f] + bt[i & 0x0f]]; #ifdef VERBOSE printf ("%03x %02x %x %x %x\n", i, colorcube[i], rt[i >> 8], gt[(i >> 4) & 0x0f], bt[i & 0x0f]); #endif } } /* this is the colorcube suitable for dithering */ static void xlib_rgb_make_colorcube_d (unsigned long *pixels, int nr, int ng, int nb) { int r, g, b; int i; colorcube_d = malloc(sizeof(unsigned char) * 512); memset(colorcube_d, 0, (sizeof(unsigned char) * 512)); for (i = 0; i < 512; i++) { r = MIN (nr - 1, i >> 6); g = MIN (ng - 1, (i >> 3) & 7); b = MIN (nb - 1, i & 7); colorcube_d[i] = pixels[(r * ng + g) * nb + b]; } } /* Try installing a color cube of the specified size. Make the colorcube and return TRUE on success */ static int xlib_rgb_try_colormap (int nr, int ng, int nb) { int r, g, b; int ri, gi, bi; int r0, g0, b0; Colormap cmap; XVisualInfo *visual; XColor *colors = NULL; XColor color; unsigned long pixels[256]; unsigned long junk[256]; int i; int d2; unsigned int colors_needed; int idx; int best[256]; if (nr * ng * nb < xlib_rgb_min_colors) return FALSE; if (image_info->cmap_alloced) { cmap = image_info->cmap; visual = image_info->x_visual_info; } else { cmap = image_info->default_colormap; visual = image_info->x_visual_info; } colors_needed = nr * ng * nb; for (i = 0; i < 256; i++) { best[i] = 192; pixels[i] = 256; } #ifndef GAMMA if (!xlib_rgb_install_cmap) { /* go out and get the colors for this colormap. */ colors = malloc(sizeof(XColor) * visual->colormap_size); for (i=0; i < visual->colormap_size; i++){ colors[i].pixel = i; } XQueryColors (image_info->display, cmap, colors, visual->colormap_size); /* find color cube colors that are already present */ for (i = 0; i < MIN (256, visual->colormap_size); i++) { r = colors[i].red >> 8; g = colors[i].green >> 8; b = colors[i].blue >> 8; ri = (r * (nr - 1) + 128) >> 8; gi = (g * (ng - 1) + 128) >> 8; bi = (b * (nb - 1) + 128) >> 8; r0 = ri * 255 / (nr - 1); g0 = gi * 255 / (ng - 1); b0 = bi * 255 / (nb - 1); idx = ((ri * nr) + gi) * nb + bi; d2 = (r - r0) * (r - r0) + (g - g0) * (g - g0) + (b - b0) * (b - b0); if (d2 < best[idx]) { if (pixels[idx] < 256) XFreeColors(image_info->display, cmap, pixels + idx, 1, 0); else colors_needed--; color.pixel = colors[i].pixel; color.red = colors[i].red; color.green = colors[i].green; color.blue = colors[i].blue; color.flags = 0; if (!XAllocColor(image_info->display, cmap, &color)) return xlib_rgb_cmap_fail ("error allocating system color\n", cmap, pixels); pixels[idx] = color.pixel; /* which is almost certainly i */ best[idx] = d2; } } } #endif if (colors_needed) { if (!XAllocColorCells(image_info->display, cmap, 0, NULL, 0, junk, colors_needed)) { char tmp_str[80]; sprintf (tmp_str, "%d %d %d colormap failed (in XAllocColorCells)\n", nr, ng, nb); return xlib_rgb_cmap_fail (tmp_str, cmap, pixels); } XFreeColors(image_info->display, cmap, junk, (int)colors_needed, 0); } for (r = 0, i = 0; r < nr; r++) for (g = 0; g < ng; g++) for (b = 0; b < nb; b++, i++) { if (pixels[i] == 256) { color.red = r * 65535 / (nr - 1); color.green = g * 65535 / (ng - 1); color.blue = b * 65535 / (nb - 1); #ifdef GAMMA color.red = 65535 * pow (color.red / 65535.0, 0.5); color.green = 65535 * pow (color.green / 65535.0, 0.5); color.blue = 65535 * pow (color.blue / 65535.0, 0.5); #endif /* This should be a raw XAllocColor call */ if (!XAllocColor(image_info->display, cmap, &color)) { char tmp_str[80]; sprintf (tmp_str, "%d %d %d colormap failed\n", nr, ng, nb); return xlib_rgb_cmap_fail (tmp_str, cmap, pixels); } pixels[i] = color.pixel; } #ifdef VERBOSE printf ("%d: %lx\n", i, pixels[i]); #endif } image_info->nred_shades = nr; image_info->ngreen_shades = ng; image_info->nblue_shades = nb; xlib_rgb_make_colorcube (pixels, nr, ng, nb); xlib_rgb_make_colorcube_d (pixels, nr, ng, nb); if (colors) free(colors); return TRUE; } /* Return TRUE on success. */ static Bool xlib_rgb_do_colormaps (void) { static const int sizes[][3] = { /* { 6, 7, 6 }, */ { 6, 6, 6 }, { 6, 6, 5 }, { 6, 6, 4 }, { 5, 5, 5 }, { 5, 5, 4 }, { 4, 4, 4 }, { 4, 4, 3 }, { 3, 3, 3 }, { 2, 2, 2 } }; static const int n_sizes = sizeof(sizes) / (3 * sizeof(int)); int i; for (i = 0; i < n_sizes; i++) if (xlib_rgb_try_colormap (sizes[i][0], sizes[i][1], sizes[i][2])) return TRUE; return FALSE; } /* Make a 2 x 2 x 2 colorcube */ static void xlib_rgb_colorcube_222 (void) { int i; XColor color; Colormap cmap; if (image_info->cmap_alloced) cmap = image_info->cmap; else cmap = image_info->default_colormap; colorcube_d = malloc(sizeof(unsigned char) * 512); for (i = 0; i < 8; i++) { color.red = ((i & 4) >> 2) * 65535; color.green = ((i & 2) >> 1) * 65535; color.blue = (i & 1) * 65535; XAllocColor (image_info->display, cmap, &color); colorcube_d[((i & 4) << 4) | ((i & 2) << 2) | (i & 1)] = color.pixel; } } /** * xlib_rgb_set_verbose: * @verbose: %True to be verbose * * Enables/disables debug spew. **/ void xlib_rgb_set_verbose (Bool verbose) { xlib_rgb_verbose = verbose; } /** * xlib_rgb_set_install: * @install: %True to install a colormap * * Sets whether we install an RGB colormap. **/ void xlib_rgb_set_install (Bool install) { xlib_rgb_install_cmap = install; } /** * xlib_rgb_set_min_colors: * @min_colors: minimum colors to use * * Sets the minimum number of colors in the color cube. **/ void xlib_rgb_set_min_colors (int min_colors) { xlib_rgb_min_colors = min_colors; } /* Return a "score" based on the following criteria (in hex): x000 is the quality - 1 is 1bpp, 2 is 4bpp, 4 is 8bpp, 7 is 15bpp truecolor, 8 is 16bpp truecolor, 9 is 24bpp truecolor. 0x00 is the speed - 1 is the normal case, 2 means faster than normal 00x0 gets a point for being the system visual 000x gets a point for being pseudocolor A caveat: in the 8bpp modes, being the system visual seems to be quite important. Thus, all of the 8bpp modes should be ranked at the same speed. */ static unsigned int xlib_rgb_score_visual (XVisualInfo *visual) { unsigned int quality, speed, pseudo, sys; static const char* visual_names[] = { "static gray", "grayscale", "static color", "pseudo color", "true color", "direct color", }; quality = 0; speed = 1; sys = 0; if (visual->class == TrueColor || visual->class == DirectColor) { if (visual->depth == 24) { quality = 9; /* Should test for MSB visual here, and set speed if so. */ } else if (visual->depth == 16) quality = 8; else if (visual->depth == 15) quality = 7; else if (visual->depth == 8) quality = 4; } else if (visual->class == PseudoColor || visual->class == StaticColor) { if (visual->depth == 8) quality = 4; else if (visual->depth == 4) quality = 2; else if (visual->depth == 1) quality = 1; } else if (visual->class == StaticGray #ifdef ENABLE_GRAYSCALE || visual->class == GrayScale #endif ) { if (visual->depth == 8) quality = 4; else if (visual->depth == 4) quality = 2; else if (visual->depth == 1) quality = 1; } if (quality == 0) return 0; sys = (visual->visualid == image_info->default_visualid->visualid); pseudo = (visual->class == PseudoColor || visual->class == TrueColor); if (xlib_rgb_verbose) printf ("Visual 0x%x, type = %s, depth = %d, %ld:%ld:%ld%s; score=%x\n", (int)visual->visualid, visual_names[visual->class], visual->depth, visual->red_mask, visual->green_mask, visual->blue_mask, sys ? " (system)" : "", (quality << 12) | (speed << 8) | (sys << 4) | pseudo); return (quality << 12) | (speed << 8) | (sys << 4) | pseudo; } static void xlib_rgb_choose_visual (void) { XVisualInfo *visuals; XVisualInfo *visual; XVisualInfo *best_visual; XVisualInfo *final_visual; XVisualInfo template; int num_visuals; unsigned int score, best_score; int cur_visual = 1; int i; template.screen = image_info->screen_num; visuals = XGetVisualInfo(image_info->display, VisualScreenMask, &template, &num_visuals); best_visual = visuals; best_score = xlib_rgb_score_visual (best_visual); for (i = cur_visual; i < num_visuals; i++) { visual = &visuals[i]; score = xlib_rgb_score_visual (visual); if (score > best_score) { best_score = score; best_visual = visual; } } /* make a copy of the visual so that we can free the allocated visual list above. */ final_visual = malloc(sizeof(XVisualInfo)); memcpy(final_visual, best_visual, sizeof(XVisualInfo)); image_info->x_visual_info = final_visual; XFree(visuals); /* set up the shift and the precision for the red, green and blue. this only applies to cool visuals like true color and direct color. */ if (image_info->x_visual_info->class == TrueColor || image_info->x_visual_info->class == DirectColor) { image_info->red_shift = xlib_get_shift_from_mask(image_info->x_visual_info->red_mask); image_info->red_prec = xlib_get_prec_from_mask(image_info->x_visual_info->red_mask); image_info->green_shift = xlib_get_shift_from_mask(image_info->x_visual_info->green_mask); image_info->green_prec = xlib_get_prec_from_mask(image_info->x_visual_info->green_mask); image_info->blue_shift = xlib_get_shift_from_mask(image_info->x_visual_info->blue_mask); image_info->blue_prec = xlib_get_prec_from_mask(image_info->x_visual_info->blue_mask); } } static void xlib_rgb_choose_visual_for_xprint (int aDepth) { XVisualInfo *visuals; XVisualInfo *visual; XVisualInfo *best_visual; XVisualInfo *final_visual; XVisualInfo template; int num_visuals; int cur_visual = 1; int i; XWindowAttributes win_att; Status ret_stat; Visual *root_visual; ret_stat = XGetWindowAttributes(image_info->display, RootWindow(image_info->display, image_info->screen_num), &win_att); root_visual = win_att.visual; template.screen = image_info->screen_num; visuals = XGetVisualInfo(image_info->display, VisualScreenMask, &template, &num_visuals); best_visual = visuals; if (best_visual->visual != root_visual) { for (i = cur_visual; i < num_visuals; i++) { visual = &visuals[i]; if (visual->visual == root_visual) { best_visual = visual; break; } } } /* make a copy of the visual so that we can free the allocated visual list above. */ final_visual = malloc(sizeof(XVisualInfo)); memcpy(final_visual, best_visual, sizeof(XVisualInfo)); image_info->x_visual_info = final_visual; XFree(visuals); /* set up the shift and the precision for the red, green and blue. this only applies to cool visuals like true color and direct color. */ if (image_info->x_visual_info->class == TrueColor || image_info->x_visual_info->class == DirectColor) { image_info->red_shift = xlib_get_shift_from_mask(image_info->x_visual_info->red_mask); image_info->red_prec = xlib_get_prec_from_mask(image_info->x_visual_info->red_mask); image_info->green_shift = xlib_get_shift_from_mask(image_info->x_visual_info->green_mask); image_info->green_prec = xlib_get_prec_from_mask(image_info->x_visual_info->green_mask); image_info->blue_shift = xlib_get_shift_from_mask(image_info->x_visual_info->blue_mask); image_info->blue_prec = xlib_get_prec_from_mask(image_info->x_visual_info->blue_mask); } } static void xlib_rgb_select_conv (XImage *image, ByteOrder byte_order); static void xlib_rgb_set_gray_cmap (Colormap cmap) { int i; XColor color; int status; unsigned long pixels[256]; int r, g, b, gray; for (i = 0; i < 256; i++) { color.pixel = i; color.red = i * 257; color.green = i * 257; color.blue = i * 257; status = XAllocColor(image_info->display, cmap, &color); pixels[i] = color.pixel; #ifdef VERBOSE printf ("allocating pixel %d, %x %x %x, result %d\n", color.pixel, color.red, color.green, color.blue, status); #endif } /* Now, we make fake colorcubes - we ultimately just use the pseudocolor methods. */ colorcube = malloc(sizeof(unsigned char) * 4096); for (i = 0; i < 4096; i++) { r = (i >> 4) & 0xf0; r = r | r >> 4; g = i & 0xf0; g = g | g >> 4; b = (i << 4 & 0xf0); b = b | b >> 4; gray = (g + ((r + b) >> 1)) >> 1; colorcube[i] = pixels[gray]; } } /** * xlib_rgb_init_with_depth: * @display: X display to use. * @screen: Screen to use. * @prefDepth: Visual depth to use for color substitution tables. This must * be one of the supported visual depths in the specified @display. * * Initializes the XlibRGB machinery with a particular depth you specify, * instead of automatically picking the best depth in the display. This * function or xlib_rgb_init() must be called before using any of the other * functions in XlibRGB. **/ void xlib_rgb_init_with_depth (Display *display, Screen *screen, int prefDepth) { int i; static const int byte_order[1] = { 1 }; static int initialized = 0; if (initialized) { return; } initialized = 1; #if X_BYTE_ORDER == X_BIG_ENDIAN if (((char *)byte_order)[0] == 1) { printf ("xlib_rgb_init: compiled for big endian, but this is a little endian machine.\n\n"); exit(1); } #else if (((char *)byte_order)[0] != 1) { printf ("xlib_rgb_init: compiled for little endian, but this is a big endian machine.\n\n"); exit(1); } #endif if (image_info == NULL) { image_info = malloc(sizeof(XlibRgbInfo)); memset(image_info, 0, sizeof(XlibRgbInfo)); image_info->display = display; image_info->screen = screen; image_info->screen_num = XScreenNumberOfScreen(screen); image_info->x_visual_info = NULL; image_info->cmap = 0; image_info->default_visualid = DefaultVisual(display, image_info->screen_num); image_info->default_colormap = DefaultColormap(display, image_info->screen_num); image_info->color_pixels = NULL; image_info->gray_pixels = NULL; image_info->reserved_pixels = NULL; image_info->nred_shades = 6; image_info->ngreen_shades = 6; image_info->nblue_shades = 4; image_info->ngray_shades = 24; image_info->nreserved = 0; image_info->bpp = 0; image_info->cmap_alloced = FALSE; image_info->gamma_val = 1.0; image_info->stage_buf = NULL; image_info->own_gc = 0; image_info->red_shift = 0; image_info->red_prec = 0; image_info->green_shift = 0; image_info->green_prec = 0; image_info->blue_shift = 0; image_info->blue_prec = 0; if (prefDepth != -1) xlib_rgb_choose_visual_for_xprint (prefDepth); else xlib_rgb_choose_visual (); if ((image_info->x_visual_info->class == PseudoColor || image_info->x_visual_info->class == StaticColor) && image_info->x_visual_info->depth < 8 && image_info->x_visual_info->depth >= 3) { image_info->cmap = image_info->default_colormap; xlib_rgb_colorcube_222 (); } else if (image_info->x_visual_info->class == PseudoColor) { if (xlib_rgb_install_cmap || image_info->x_visual_info->visualid != image_info->default_visualid->visualid) { image_info->cmap = XCreateColormap(image_info->display, RootWindow(image_info->display, image_info->screen_num), image_info->x_visual_info->visual, AllocNone); image_info->cmap_alloced = TRUE; } if (!xlib_rgb_do_colormaps ()) { image_info->cmap = XCreateColormap(image_info->display, RootWindow(image_info->display, image_info->screen_num), image_info->x_visual_info->visual, AllocNone); image_info->cmap_alloced = TRUE; xlib_rgb_do_colormaps (); } if (xlib_rgb_verbose) printf ("color cube: %d x %d x %d\n", image_info->nred_shades, image_info->ngreen_shades, image_info->nblue_shades); if (!image_info->cmap_alloced) image_info->cmap = image_info->default_colormap; } #ifdef ENABLE_GRAYSCALE else if (image_info->x_visual_info->class == GrayScale) { image_info->cmap = XCreateColormap(image_info->display, RootWindow(image_info->display, image_info->screen_num), image_info->x_visual_info->visual, AllocNone); xlib_rgb_set_gray_cmap (image_info->cmap); image_info->cmap_alloced = TRUE; } #endif else { /* Always install colormap in direct color. */ if (image_info->x_visual_info->class != DirectColor && image_info->x_visual_info->visualid == image_info->default_visualid->visualid) image_info->cmap = image_info->default_colormap; else { image_info->cmap = XCreateColormap(image_info->display, RootWindow(image_info->display, image_info->screen_num), image_info->x_visual_info->visual, AllocNone); image_info->cmap_alloced = TRUE; } } image_info->bitmap = (image_info->x_visual_info->depth == 1); for (i = 0; i < N_IMAGES; i++) { if (image_info->bitmap) { /* Use malloc() instead of g_malloc since X will free() this mem */ static_image[i] = XCreateImage(image_info->display, image_info->x_visual_info->visual, 1, XYBitmap, 0, 0, IMAGE_WIDTH, IMAGE_HEIGHT, 8, 0); static_image[i]->data = malloc(IMAGE_WIDTH * IMAGE_HEIGHT >> 3); static_image[i]->bitmap_bit_order = MSBFirst; static_image[i]->byte_order = MSBFirst; } else { static_image[i] = XCreateImage(image_info->display, image_info->x_visual_info->visual, (unsigned int)image_info->x_visual_info->depth, ZPixmap, 0, 0, IMAGE_WIDTH, IMAGE_HEIGHT, 32, 0); /* remove this when we are using shared memory.. */ static_image[i]->data = malloc((size_t)IMAGE_WIDTH * IMAGE_HEIGHT * image_info->x_visual_info->depth); static_image[i]->bitmap_bit_order = MSBFirst; static_image[i]->byte_order = MSBFirst; } } /* ok, so apparently, image_info->bpp is actually BYTES per pixel. What fun! */ switch (static_image[0]->bits_per_pixel) { case 1: case 8: image_info->bpp = 1; break; case 16: image_info->bpp = 2; break; case 24: image_info->bpp = 3; break; case 32: image_info->bpp = 4; break; } xlib_rgb_select_conv (static_image[0], MSB_FIRST); } } #if X_BYTE_ORDER == X_LITTLE_ENDIAN #define HAIRY_CONVERT_8 #endif #ifdef HAIRY_CONVERT_8 static void xlib_rgb_convert_8 (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; int r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax; for (y = 0; y < height; y++) { bp2 = bptr; obptr = obuf; if (((unsigned long)obuf | (unsigned long) bp2) & 3) { for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; obptr[0] = colorcube[((r & 0xf0) << 4) | (g & 0xf0) | (b >> 4)]; obptr++; } } else { for (x = 0; x < width - 3; x += 4) { unsigned int r1b0g0r0; unsigned int g2r2b1g1; unsigned int b3g3r3b2; r1b0g0r0 = ((unsigned int *)bp2)[0]; g2r2b1g1 = ((unsigned int *)bp2)[1]; b3g3r3b2 = ((unsigned int *)bp2)[2]; ((unsigned int *)obptr)[0] = colorcube[((r1b0g0r0 & 0xf0) << 4) | ((r1b0g0r0 & 0xf000) >> 8) | ((r1b0g0r0 & 0xf00000) >> 20)] | (colorcube[((r1b0g0r0 & 0xf0000000) >> 20) | (g2r2b1g1 & 0xf0) | ((g2r2b1g1 & 0xf000) >> 12)] << 8) | (colorcube[((g2r2b1g1 & 0xf00000) >> 12) | ((g2r2b1g1 & 0xf0000000) >> 24) | ((b3g3r3b2 & 0xf0) >> 4)] << 16) | (colorcube[((b3g3r3b2 & 0xf000) >> 4) | ((b3g3r3b2 & 0xf00000) >> 16) | (b3g3r3b2 >> 28)] << 24); bp2 += 12; obptr += 4; } for (; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; obptr[0] = colorcube[((r & 0xf0) << 4) | (g & 0xf0) | (b >> 4)]; obptr++; } } bptr += rowstride; obuf += bpl; } } #else static void xlib_rgb_convert_8 (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; int r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax; for (y = 0; y < height; y++) { bp2 = bptr; obptr = obuf; for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; obptr[0] = colorcube[((r & 0xf0) << 4) | (g & 0xf0) | (b >> 4)]; obptr++; } bptr += rowstride; obuf += bpl; } } #endif #if 1 /* This dither table was generated by Raph Levien using patented technology (US Patent 5,276,535). The dither table itself is in the public domain. */ #define DM_WIDTH 128 #define DM_WIDTH_SHIFT 7 #define DM_HEIGHT 128 static const unsigned char DM[128][128] = { { 0, 41, 23, 5, 17, 39, 7, 15, 62, 23, 40, 51, 31, 47, 9, 32, 52, 27, 57, 25, 6, 61, 27, 52, 37, 7, 40, 63, 18, 36, 10, 42, 25, 62, 45, 34, 20, 42, 37, 14, 35, 29, 50, 10, 61, 2, 40, 8, 37, 12, 58, 22, 5, 41, 10, 39, 0, 60, 11, 46, 2, 55, 38, 17, 36, 59, 13, 54, 37, 56, 8, 29, 16, 13, 63, 22, 41, 55, 7, 20, 49, 14, 23, 55, 37, 23, 19, 36, 15, 49, 23, 63, 30, 14, 38, 27, 53, 13, 22, 41, 19, 31, 7, 19, 50, 30, 49, 16, 3, 32, 56, 40, 29, 34, 8, 48, 19, 45, 4, 51, 12, 46, 35, 49, 16, 42, 12, 62 }, { 30, 57, 36, 54, 47, 34, 52, 27, 43, 4, 28, 7, 17, 36, 62, 13, 44, 7, 18, 48, 33, 21, 44, 14, 30, 47, 12, 33, 5, 55, 31, 58, 13, 30, 4, 17, 52, 10, 60, 26, 46, 0, 39, 27, 42, 22, 47, 25, 60, 32, 9, 38, 48, 17, 59, 30, 49, 18, 34, 25, 51, 19, 5, 48, 21, 8, 28, 46, 1, 32, 41, 19, 54, 47, 37, 18, 28, 11, 44, 30, 39, 56, 2, 33, 8, 42, 61, 28, 58, 8, 46, 9, 41, 4, 58, 7, 21, 48, 59, 10, 52, 14, 42, 57, 12, 25, 7, 53, 42, 24, 11, 50, 17, 59, 42, 2, 36, 60, 32, 17, 63, 29, 21, 7, 59, 32, 24, 39 }, { 22, 8, 16, 32, 3, 25, 13, 57, 18, 45, 58, 39, 55, 20, 5, 42, 23, 34, 63, 1, 51, 10, 58, 4, 60, 23, 53, 27, 44, 21, 3, 48, 8, 50, 43, 54, 27, 32, 5, 55, 21, 58, 12, 53, 6, 36, 14, 50, 17, 29, 53, 15, 24, 52, 7, 36, 13, 42, 4, 53, 9, 35, 61, 26, 56, 32, 49, 15, 62, 23, 6, 60, 2, 31, 4, 48, 58, 38, 15, 61, 5, 25, 47, 28, 50, 15, 7, 40, 3, 32, 33, 52, 25, 50, 35, 42, 61, 3, 28, 36, 23, 63, 4, 33, 46, 62, 36, 23, 60, 6, 54, 28, 4, 37, 23, 55, 25, 8, 42, 54, 14, 6, 56, 38, 19, 52, 4, 46 }, { 48, 53, 43, 12, 45, 63, 30, 37, 9, 34, 21, 1, 25, 47, 29, 58, 3, 54, 15, 39, 29, 17, 38, 35, 20, 43, 1, 49, 15, 59, 29, 39, 22, 35, 16, 23, 1, 47, 39, 18, 8, 44, 25, 31, 57, 19, 63, 4, 45, 3, 42, 61, 1, 31, 45, 20, 57, 29, 62, 21, 32, 41, 14, 44, 3, 39, 5, 34, 10, 43, 51, 35, 23, 52, 40, 10, 21, 1, 53, 18, 51, 43, 12, 62, 18, 54, 26, 51, 20, 57, 14, 1, 62, 16, 11, 18, 32, 39, 17, 44, 1, 48, 26, 37, 18, 2, 51, 14, 28, 45, 35, 18, 57, 13, 47, 11, 51, 20, 2, 39, 31, 47, 25, 1, 50, 11, 60, 7 }, { 18, 28, 1, 56, 21, 10, 51, 2, 46, 54, 14, 61, 11, 50, 13, 38, 19, 31, 45, 9, 55, 24, 47, 5, 54, 9, 62, 11, 35, 8, 51, 14, 57, 6, 63, 40, 58, 14, 51, 28, 62, 34, 15, 48, 1, 41, 30, 35, 55, 21, 34, 11, 49, 37, 8, 52, 4, 23, 15, 43, 1, 58, 11, 23, 53, 16, 55, 26, 58, 18, 27, 12, 45, 14, 25, 63, 42, 33, 27, 35, 9, 31, 21, 38, 1, 44, 34, 12, 48, 38, 21, 44, 29, 47, 26, 53, 1, 46, 54, 8, 59, 29, 11, 55, 22, 41, 33, 20, 39, 1, 48, 9, 44, 32, 5, 62, 29, 44, 57, 23, 10, 58, 34, 43, 15, 37, 26, 33 }, { 51, 38, 59, 24, 35, 42, 19, 60, 5, 32, 41, 26, 43, 33, 7, 53, 48, 11, 59, 23, 42, 2, 61, 30, 16, 40, 32, 24, 56, 41, 19, 33, 37, 26, 47, 9, 31, 22, 2, 45, 9, 54, 4, 37, 21, 52, 11, 23, 7, 57, 16, 25, 55, 18, 63, 27, 46, 39, 56, 10, 50, 37, 29, 47, 19, 63, 24, 9, 46, 2, 39, 60, 9, 57, 30, 7, 49, 11, 59, 3, 45, 57, 5, 60, 29, 22, 5, 60, 30, 9, 59, 18, 40, 6, 57, 36, 30, 12, 24, 34, 15, 40, 52, 6, 49, 9, 58, 4, 63, 12, 26, 61, 22, 53, 38, 16, 35, 14, 28, 50, 42, 17, 5, 28, 62, 20, 54, 12 }, { 26, 6, 31, 15, 49, 6, 38, 27, 22, 49, 16, 56, 2, 62, 30, 21, 0, 36, 28, 6, 49, 32, 13, 52, 26, 50, 19, 46, 3, 26, 62, 0, 53, 12, 29, 3, 53, 41, 60, 24, 38, 13, 58, 16, 43, 9, 59, 39, 46, 28, 44, 40, 2, 33, 13, 41, 16, 6, 47, 31, 26, 17, 57, 6, 38, 0, 42, 36, 29, 52, 20, 31, 48, 0, 34, 56, 20, 36, 23, 54, 14, 41, 24, 37, 10, 55, 46, 25, 16, 45, 36, 4, 55, 23, 15, 8, 50, 62, 5, 56, 44, 20, 13, 28, 59, 31, 24, 47, 31, 52, 37, 17, 40, 0, 26, 49, 3, 60, 7, 33, 0, 61, 53, 40, 8, 45, 2, 41 }, { 16, 63, 43, 4, 61, 24, 56, 13, 53, 8, 36, 12, 24, 41, 16, 46, 60, 26, 52, 39, 14, 57, 21, 37, 0, 45, 7, 59, 38, 17, 43, 10, 45, 20, 61, 43, 19, 11, 33, 17, 50, 32, 23, 61, 28, 49, 26, 0, 18, 51, 5, 60, 22, 58, 29, 0, 59, 34, 19, 62, 3, 52, 7, 44, 30, 59, 13, 50, 15, 62, 7, 17, 38, 22, 44, 15, 40, 4, 47, 28, 33, 17, 49, 16, 51, 40, 10, 56, 0, 53, 13, 49, 28, 38, 60, 21, 43, 19, 37, 27, 3, 51, 34, 39, 0, 45, 15, 43, 10, 21, 3, 55, 8, 33, 59, 10, 41, 18, 52, 24, 46, 20, 30, 13, 58, 22, 36, 57 }, { 50, 34, 11, 47, 29, 17, 44, 0, 33, 63, 28, 46, 52, 5, 57, 10, 42, 18, 4, 63, 20, 8, 44, 10, 56, 34, 14, 29, 5, 54, 23, 59, 32, 49, 7, 34, 49, 27, 56, 0, 42, 7, 46, 3, 40, 6, 54, 32, 62, 13, 36, 10, 47, 8, 35, 49, 24, 51, 12, 40, 22, 35, 60, 12, 22, 51, 33, 4, 40, 25, 43, 55, 5, 54, 12, 61, 26, 51, 8, 62, 0, 53, 7, 63, 2, 32, 19, 34, 42, 24, 31, 63, 2, 10, 45, 33, 0, 48, 9, 61, 22, 47, 8, 62, 18, 56, 7, 54, 27, 57, 46, 30, 50, 19, 45, 30, 56, 36, 22, 47, 11, 38, 3, 51, 32, 48, 18, 9 }, { 0, 21, 40, 19, 52, 9, 37, 48, 20, 40, 3, 18, 27, 38, 35, 22, 31, 56, 13, 35, 46, 28, 60, 40, 27, 18, 61, 50, 41, 30, 7, 36, 2, 25, 16, 57, 5, 15, 47, 29, 55, 19, 30, 52, 15, 34, 20, 12, 43, 30, 20, 54, 25, 44, 53, 12, 38, 5, 55, 27, 48, 15, 33, 27, 45, 8, 19, 28, 56, 11, 33, 49, 18, 36, 29, 2, 45, 16, 39, 19, 31, 43, 27, 35, 20, 52, 26, 6, 61, 11, 41, 17, 29, 51, 20, 56, 25, 32, 41, 17, 53, 31, 25, 14, 42, 23, 35, 16, 38, 6, 34, 12, 15, 62, 6, 21, 13, 1, 63, 9, 55, 27, 43, 25, 14, 4, 31, 55 }, { 44, 29, 61, 2, 35, 58, 26, 15, 60, 10, 51, 59, 14, 55, 8, 50, 2, 44, 25, 51, 1, 33, 16, 4, 48, 36, 2, 21, 12, 57, 48, 13, 51, 55, 40, 28, 37, 62, 8, 39, 12, 63, 36, 10, 59, 24, 56, 47, 9, 50, 41, 1, 32, 17, 6, 21, 61, 30, 9, 43, 1, 54, 41, 2, 54, 37, 48, 61, 1, 46, 21, 3, 58, 24, 50, 32, 60, 10, 57, 25, 46, 12, 59, 4, 45, 13, 57, 47, 27, 39, 5, 58, 47, 14, 35, 4, 52, 13, 60, 6, 36, 10, 45, 55, 4, 50, 29, 2, 61, 50, 25, 58, 44, 24, 36, 42, 54, 28, 40, 32, 16, 56, 6, 62, 46, 39, 60, 23 }, { 7, 48, 14, 54, 23, 40, 4, 45, 30, 22, 42, 32, 1, 44, 20, 29, 58, 8, 37, 19, 41, 54, 24, 58, 9, 53, 25, 46, 34, 16, 23, 38, 27, 11, 18, 1, 52, 21, 35, 22, 48, 5, 25, 45, 18, 38, 2, 27, 35, 4, 57, 15, 62, 39, 57, 28, 42, 16, 36, 60, 24, 18, 10, 63, 20, 5, 16, 23, 37, 14, 59, 27, 41, 8, 13, 42, 21, 35, 6, 50, 3, 38, 15, 48, 30, 39, 17, 3, 49, 14, 53, 33, 24, 7, 61, 44, 11, 39, 23, 49, 19, 58, 1, 32, 36, 12, 60, 41, 20, 13, 41, 4, 39, 1, 48, 8, 18, 51, 14, 44, 5, 37, 21, 34, 1, 26, 10, 37 }, { 53, 36, 27, 9, 50, 12, 32, 55, 2, 57, 7, 17, 48, 34, 63, 15, 40, 26, 62, 11, 49, 6, 31, 39, 22, 42, 6, 63, 1, 39, 60, 4, 42, 61, 32, 45, 24, 44, 2, 60, 16, 41, 53, 1, 33, 61, 49, 17, 63, 23, 45, 26, 33, 3, 23, 46, 2, 50, 20, 4, 45, 34, 49, 30, 39, 58, 44, 31, 53, 34, 6, 52, 30, 47, 63, 1, 53, 22, 42, 31, 58, 23, 54, 22, 61, 8, 36, 59, 22, 35, 21, 1, 55, 40, 27, 16, 30, 54, 2, 29, 43, 16, 39, 63, 21, 46, 26, 10, 48, 32, 19, 53, 30, 56, 26, 60, 33, 4, 61, 23, 49, 59, 15, 53, 19, 58, 42, 16 }, { 20, 5, 59, 46, 25, 62, 7, 19, 43, 25, 37, 61, 11, 24, 4, 54, 12, 52, 3, 32, 17, 61, 12, 47, 15, 55, 18, 31, 53, 28, 9, 50, 21, 6, 55, 9, 58, 14, 54, 26, 33, 7, 31, 58, 13, 21, 8, 42, 29, 6, 37, 11, 48, 52, 14, 60, 11, 39, 56, 32, 14, 58, 7, 26, 17, 4, 42, 8, 11, 47, 19, 38, 10, 17, 26, 37, 9, 55, 28, 13, 18, 40, 6, 33, 1, 43, 25, 11, 51, 7, 62, 43, 18, 37, 3, 57, 45, 9, 38, 58, 5, 52, 27, 7, 17, 53, 5, 57, 37, 2, 63, 9, 22, 15, 11, 38, 25, 45, 35, 0, 28, 10, 41, 30, 50, 8, 31, 57 }, { 49, 33, 16, 38, 1, 42, 51, 34, 53, 14, 28, 49, 30, 56, 36, 23, 43, 20, 38, 56, 22, 45, 28, 0, 62, 35, 26, 44, 11, 19, 52, 35, 44, 15, 30, 38, 10, 31, 40, 4, 46, 50, 20, 40, 27, 44, 51, 14, 56, 53, 19, 59, 7, 29, 41, 19, 35, 25, 8, 52, 22, 44, 13, 53, 50, 32, 61, 24, 56, 25, 63, 0, 45, 57, 33, 59, 16, 46, 4, 62, 50, 11, 60, 37, 52, 19, 55, 29, 37, 46, 13, 26, 48, 10, 50, 34, 21, 63, 26, 13, 42, 33, 22, 55, 35, 28, 43, 15, 24, 51, 27, 34, 46, 49, 58, 3, 52, 9, 57, 19, 48, 55, 3, 35, 12, 45, 24, 3 }, { 41, 11, 56, 28, 18, 31, 22, 10, 37, 6, 47, 13, 3, 41, 9, 46, 0, 48, 29, 6, 34, 10, 55, 37, 20, 8, 49, 3, 41, 59, 14, 25, 0, 63, 19, 47, 27, 51, 17, 57, 23, 10, 61, 6, 54, 3, 38, 31, 0, 22, 34, 43, 20, 55, 31, 0, 49, 63, 29, 38, 3, 62, 28, 40, 0, 22, 14, 35, 2, 48, 15, 43, 23, 14, 3, 29, 49, 20, 39, 34, 0, 44, 29, 9, 15, 47, 5, 42, 0, 31, 58, 5, 31, 61, 23, 15, 0, 47, 19, 50, 24, 3, 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30, 21, 51, 32, 63, 25, 1, 60, 27, 53, 18, 51, 22, 28, 55, 34, 12, 40, 3, 60, 29, 57, 41, 6, 44, 11, 53, 8, 61, 24, 57, 1, 28, 44, 59, 36, 3, 34, 25, 41, 31, 16, 44, 22, 47, 28, 58, 1, 49, 54, 29 }, { 58, 25, 50, 13, 38, 30, 60, 24, 6, 57, 27, 42, 9, 45, 6, 61, 30, 50, 4, 34, 29, 3, 46, 13, 22, 42, 58, 28, 9, 39, 23, 44, 7, 15, 44, 2, 40, 15, 47, 41, 23, 37, 7, 59, 38, 11, 34, 6, 62, 14, 52, 35, 55, 19, 32, 61, 33, 24, 57, 6, 22, 59, 29, 7, 49, 25, 40, 3, 17, 39, 27, 52, 0, 55, 16, 57, 24, 61, 36, 6, 29, 12, 48, 39, 20, 44, 6, 40, 33, 5, 48, 10, 57, 36, 22, 51, 33, 9, 24, 12, 62, 29, 50, 35, 14, 43, 5, 33, 47, 52, 13, 23, 10, 51, 56, 16, 46, 1, 49, 4, 61, 9, 52, 18, 31, 21, 36, 17 }, { 19, 42, 9, 48, 2, 44, 11, 37, 48, 20, 33, 16, 55, 35, 49, 15, 37, 20, 59, 16, 53, 22, 56, 31, 50, 11, 34, 54, 16, 51, 4, 49, 33, 53, 21, 28, 56, 24, 31, 9, 52, 16, 48, 24, 44, 13, 51, 20, 31, 49, 18, 6, 34, 2, 44, 14, 47, 8, 15, 43, 13, 41, 33, 52, 20, 61, 7, 51, 34, 62, 4, 20, 36, 33, 43, 8, 46, 13, 53, 17, 45, 42, 9, 31, 52, 11, 30, 56, 13, 59, 17, 44, 27, 6, 62, 11, 43, 17, 49, 38, 26, 2, 16, 27, 58, 21, 54, 18, 26, 5, 35, 61, 43, 27, 7, 39, 14, 58, 37, 55, 20, 33, 13, 40, 62, 10, 55, 5 }, { 51, 14, 61, 29, 59, 20, 55, 31, 0, 49, 11, 60, 3, 26, 22, 56, 0, 40, 12, 43, 41, 8, 36, 0, 17, 57, 24, 2, 46, 26, 61, 18, 0, 38, 12, 59, 6, 49, 3, 57, 19, 63, 5, 33, 18, 54, 28, 56, 0, 43, 26, 46, 63, 27, 56, 22, 27, 54, 38, 28, 63, 24, 10, 45, 0, 31, 42, 21, 12, 25, 44, 49, 59, 6, 26, 50, 3, 34, 27, 59, 0, 35, 62, 16, 4, 58, 47, 0, 43, 24, 37, 2, 54, 20, 46, 31, 0, 56, 34, 5, 55, 45, 60, 37, 0, 40, 10, 38, 63, 46, 15, 20, 0, 53, 21, 62, 30, 11, 24, 27, 40, 0, 57, 26, 3, 45, 27, 35 }, }; #else #define DM_WIDTH 8 #define DM_WIDTH_SHIFT 3 #define DM_HEIGHT 8 static const unsigned char DM[8][8] = { { 0, 32, 8, 40, 2, 34, 10, 42 }, { 48, 16, 56, 24, 50, 18, 58, 26 }, { 12, 44, 4, 36, 14, 46, 6, 38 }, { 60, 28, 52, 20, 62, 30, 54, 22 }, { 3, 35, 11, 43, 1, 33, 9, 41 }, { 51, 19, 59, 27, 49, 17, 57, 25 }, { 15, 47, 7, 39, 13, 45, 5, 37 }, { 63, 31, 55, 23, 61, 29, 53, 21 } }; #endif static unsigned int *DM_565 = NULL; static void xlib_rgb_preprocess_dm_565 (void) { int i; unsigned int dith; if (DM_565 == NULL) { DM_565 = malloc(sizeof(unsigned int) * DM_WIDTH * DM_HEIGHT); for (i = 0; i < DM_WIDTH * DM_HEIGHT; i++) { dith = DM[0][i] >> 3; DM_565[i] = (dith << 20) | dith | (((7 - dith) >> 1) << 10); #ifdef VERBOSE printf ("%i %x %x\n", i, dith, DM_565[i]); #endif } } } static void xlib_rgb_convert_8_d666 (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; int r, g, b; const unsigned char *dmp; int dith; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax; for (y = 0; y < height; y++) { dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; bp2 = bptr; obptr = obuf; for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 7; r = ((r * 5) + dith) >> 8; g = ((g * 5) + (262 - dith)) >> 8; b = ((b * 5) + dith) >> 8; obptr[0] = colorcube_d[(r << 6) | (g << 3) | b]; obptr++; } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_8_d (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; int r, g, b; const unsigned char *dmp; int dith; int rs, gs, bs; bptr = buf; bpl = image->bytes_per_line; rs = image_info->nred_shades - 1; gs = image_info->ngreen_shades - 1; bs = image_info->nblue_shades - 1; obuf = ((unsigned char *)image->data) + ay * bpl + ax; for (y = 0; y < height; y++) { dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; bp2 = bptr; obptr = obuf; for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 7; r = ((r * rs) + dith) >> 8; g = ((g * gs) + (262 - dith)) >> 8; b = ((b * bs) + dith) >> 8; obptr[0] = colorcube_d[(r << 6) | (g << 3) | b]; obptr++; } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_8_indexed (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; unsigned char c; unsigned char *lut; lut = cmap->lut; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax; for (y = 0; y < height; y++) { bp2 = bptr; obptr = obuf; for (x = 0; x < width; x++) { c = *bp2++; obptr[0] = lut[c]; obptr++; } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_gray8 (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; int r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax; for (y = 0; y < height; y++) { bp2 = bptr; obptr = obuf; for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; obptr[0] = (g + ((b + r) >> 1)) >> 1; obptr++; } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_gray8_gray (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int y; int bpl; unsigned char *obuf; unsigned char *bptr; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax; for (y = 0; y < height; y++) { memcpy (obuf, bptr, (unsigned int)width); bptr += rowstride; obuf += bpl; } } #if X_BYTE_ORDER == X_LITTLE_ENDIAN #define HAIRY_CONVERT_565 #endif #ifdef HAIRY_CONVERT_565 /* Render a 24-bit RGB image in buf into the GdkImage, without dithering. This assumes native byte ordering - what should really be done is to check whether static_image->byte_order is consistent with the _ENDIAN config flag, and if not, use a different function. This one is even faster than the one below - its inner loop loads 3 words (i.e. 4 24-bit pixels), does a lot of shifting and masking, then writes 2 words. */ static void xlib_rgb_convert_565 (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf, *obptr; int bpl; unsigned char *bptr, *bp2; unsigned char r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; for (y = 0; y < height; y++) { bp2 = bptr; obptr = obuf; if (((unsigned long)obuf | (unsigned long) bp2) & 3) { for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; ((unsigned short *)obptr)[0] = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | (b >> 3); obptr += 2; } } else { for (x = 0; x < width - 3; x += 4) { unsigned int r1b0g0r0; unsigned int g2r2b1g1; unsigned int b3g3r3b2; r1b0g0r0 = ((unsigned int *)bp2)[0]; g2r2b1g1 = ((unsigned int *)bp2)[1]; b3g3r3b2 = ((unsigned int *)bp2)[2]; ((unsigned int *)obptr)[0] = ((r1b0g0r0 & 0xf8) << 8) | ((r1b0g0r0 & 0xfc00) >> 5) | ((r1b0g0r0 & 0xf80000) >> 19) | (r1b0g0r0 & 0xf8000000) | ((g2r2b1g1 & 0xfc) << 19) | ((g2r2b1g1 & 0xf800) << 5); ((unsigned int *)obptr)[1] = ((g2r2b1g1 & 0xf80000) >> 8) | ((g2r2b1g1 & 0xfc000000) >> 21) | ((b3g3r3b2 & 0xf8) >> 3) | ((b3g3r3b2 & 0xf800) << 16) | ((b3g3r3b2 & 0xfc0000) << 3) | ((b3g3r3b2 & 0xf8000000) >> 11); bp2 += 12; obptr += 8; } for (; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; ((unsigned short *)obptr)[0] = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | (b >> 3); obptr += 2; } } bptr += rowstride; obuf += bpl; } } #else /* Render a 24-bit RGB image in buf into the GdkImage, without dithering. This assumes native byte ordering - what should really be done is to check whether static_image->byte_order is consistent with the _ENDIAN config flag, and if not, use a different function. This routine is faster than the one included with Gtk 1.0 for a number of reasons: 1. Shifting instead of lookup tables (less memory traffic). 2. Much less register pressure, especially because shifts are in the code. 3. A memcpy is avoided (i.e. the transfer function). 4. On big-endian architectures, byte swapping is avoided. That said, it wouldn't be hard to make it even faster - just make an inner loop that reads 3 words (i.e. 4 24-bit pixels), does a lot of shifting and masking, then writes 2 words. */ static void xlib_rgb_convert_565 (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf; int bpl; unsigned char *bptr, *bp2; unsigned char r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; for (y = 0; y < height; y++) { bp2 = bptr; for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; ((unsigned short *)obuf)[x] = ((r & 0xf8) << 8) | ((g & 0xfc) << 3) | (b >> 3); } bptr += rowstride; obuf += bpl; } } #endif #ifdef HAIRY_CONVERT_565 static void xlib_rgb_convert_565_gray (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf, *obptr; int bpl; unsigned char *bptr, *bp2; unsigned char g; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; for (y = 0; y < height; y++) { bp2 = bptr; obptr = obuf; if (((unsigned long)obuf | (unsigned long) bp2) & 3) { for (x = 0; x < width; x++) { g = *bp2++; ((unsigned short *)obptr)[0] = ((g & 0xf8) << 8) | ((g & 0xfc) << 3) | (g >> 3); obptr += 2; } } else { for (x = 0; x < width - 3; x += 4) { unsigned int g3g2g1g0; g3g2g1g0 = ((unsigned int *)bp2)[0]; ((unsigned int *)obptr)[0] = ((g3g2g1g0 & 0xf8) << 8) | ((g3g2g1g0 & 0xfc) << 3) | ((g3g2g1g0 & 0xf8) >> 3) | (g3g2g1g0 & 0xf800) << 16 | ((g3g2g1g0 & 0xfc00) << 11) | ((g3g2g1g0 & 0xf800) << 5); ((unsigned int *)obptr)[1] = ((g3g2g1g0 & 0xf80000) >> 8) | ((g3g2g1g0 & 0xfc0000) >> 13) | ((g3g2g1g0 & 0xf80000) >> 19) | (g3g2g1g0 & 0xf8000000) | ((g3g2g1g0 & 0xfc000000) >> 5) | ((g3g2g1g0 & 0xf8000000) >> 11); bp2 += 4; obptr += 8; } for (; x < width; x++) { g = *bp2++; ((unsigned short *)obptr)[0] = ((g & 0xf8) << 8) | ((g & 0xfc) << 3) | (g >> 3); obptr += 2; } } bptr += rowstride; obuf += bpl; } } #else static void xlib_rgb_convert_565_gray (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf; int bpl; unsigned char *bptr, *bp2; unsigned char g; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; for (y = 0; y < height; y++) { bp2 = bptr; for (x = 0; x < width; x++) { g = *bp2++; ((unsigned short *)obuf)[x] = ((g & 0xf8) << 8) | ((g & 0xfc) << 3) | (g >> 3); } bptr += rowstride; obuf += bpl; } } #endif static void xlib_rgb_convert_565_br (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf; int bpl; unsigned char *bptr, *bp2; unsigned char r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; for (y = 0; y < height; y++) { bp2 = bptr; for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; /* final word is: g4 g3 g2 b7 b6 b5 b4 b3 r7 r6 r5 r4 r3 g7 g6 g5 */ ((unsigned short *)obuf)[x] = (r & 0xf8) | ((g & 0xe0) >> 5) | ((g & 0x1c) << 11) | ((b & 0xf8) << 5); } bptr += rowstride; obuf += bpl; } } /* Thanks to Ray Lehtiniemi for a patch that resulted in a ~25% speedup in this mode. */ #ifdef HAIRY_CONVERT_565 static void xlib_rgb_convert_565_d (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { /* Now this is what I'd call some highly tuned code! */ int x, y; unsigned char *obuf, *obptr; int bpl; unsigned char *bptr, *bp2; width += x_align; height += y_align; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; for (y = y_align; y < height; y++) { unsigned int *dmp = DM_565 + ((y & (DM_HEIGHT - 1)) << DM_WIDTH_SHIFT); bp2 = bptr; obptr = obuf; if (((unsigned long)obuf | (unsigned long) bp2) & 3) { for (x = x_align; x < width; x++) { int rgb = *bp2++ << 20; rgb += *bp2++ << 10; rgb += *bp2++; rgb += dmp[x & (DM_WIDTH - 1)]; rgb += 0x10040100 - ((rgb & 0x1e0001e0) >> 5) - ((rgb & 0x00070000) >> 6); ((unsigned short *)obptr)[0] = ((rgb & 0x0f800000) >> 12) | ((rgb & 0x0003f000) >> 7) | ((rgb & 0x000000f8) >> 3); obptr += 2; } } else { for (x = x_align; x < width - 3; x += 4) { unsigned int r1b0g0r0; unsigned int g2r2b1g1; unsigned int b3g3r3b2; unsigned int rgb02, rgb13; r1b0g0r0 = ((unsigned int *)bp2)[0]; g2r2b1g1 = ((unsigned int *)bp2)[1]; b3g3r3b2 = ((unsigned int *)bp2)[2]; rgb02 = ((r1b0g0r0 & 0xff) << 20) + ((r1b0g0r0 & 0xff00) << 2) + ((r1b0g0r0 & 0xff0000) >> 16) + dmp[x & (DM_WIDTH - 1)]; rgb02 += 0x10040100 - ((rgb02 & 0x1e0001e0) >> 5) - ((rgb02 & 0x00070000) >> 6); rgb13 = ((r1b0g0r0 & 0xff000000) >> 4) + ((g2r2b1g1 & 0xff) << 10) + ((g2r2b1g1 & 0xff00) >> 8) + dmp[(x + 1) & (DM_WIDTH - 1)]; rgb13 += 0x10040100 - ((rgb13 & 0x1e0001e0) >> 5) - ((rgb13 & 0x00070000) >> 6); ((unsigned int *)obptr)[0] = ((rgb02 & 0x0f800000) >> 12) | ((rgb02 & 0x0003f000) >> 7) | ((rgb02 & 0x000000f8) >> 3) | ((rgb13 & 0x0f800000) << 4) | ((rgb13 & 0x0003f000) << 9) | ((rgb13 & 0x000000f8) << 13); rgb02 = ((g2r2b1g1 & 0xff0000) << 4) + ((g2r2b1g1 & 0xff000000) >> 14) + (b3g3r3b2 & 0xff) + dmp[(x + 2) & (DM_WIDTH - 1)]; rgb02 += 0x10040100 - ((rgb02 & 0x1e0001e0) >> 5) - ((rgb02 & 0x00070000) >> 6); rgb13 = ((b3g3r3b2 & 0xff00) << 12) + ((b3g3r3b2 & 0xff0000) >> 6) + ((b3g3r3b2 & 0xff000000) >> 24) + dmp[(x + 3) & (DM_WIDTH - 1)]; rgb13 += 0x10040100 - ((rgb13 & 0x1e0001e0) >> 5) - ((rgb13 & 0x00070000) >> 6); ((unsigned int *)obptr)[1] = ((rgb02 & 0x0f800000) >> 12) | ((rgb02 & 0x0003f000) >> 7) | ((rgb02 & 0x000000f8) >> 3) | ((rgb13 & 0x0f800000) << 4) | ((rgb13 & 0x0003f000) << 9) | ((rgb13 & 0x000000f8) << 13); bp2 += 12; obptr += 8; } for (; x < width; x++) { int rgb = *bp2++ << 20; rgb += *bp2++ << 10; rgb += *bp2++; rgb += dmp[x & (DM_WIDTH - 1)]; rgb += 0x10040100 - ((rgb & 0x1e0001e0) >> 5) - ((rgb & 0x00070000) >> 6); ((unsigned short *)obptr)[0] = ((rgb & 0x0f800000) >> 12) | ((rgb & 0x0003f000) >> 7) | ((rgb & 0x000000f8) >> 3); obptr += 2; } } bptr += rowstride; obuf += bpl; } } #else static void xlib_rgb_convert_565_d (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf; int bpl; unsigned char *bptr; width += x_align; height += y_align; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + (ax - x_align) * 2; for (y = y_align; y < height; y++) { unsigned int *dmp = DM_565 + ((y & (DM_HEIGHT - 1)) << DM_WIDTH_SHIFT); unsigned char *bp2 = bptr; for (x = x_align; x < width; x++) { int rgb = *bp2++ << 20; rgb += *bp2++ << 10; rgb += *bp2++; rgb += dmp[x & (DM_WIDTH - 1)]; rgb += 0x10040100 - ((rgb & 0x1e0001e0) >> 5) - ((rgb & 0x00070000) >> 6); ((unsigned short *)obuf)[x] = ((rgb & 0x0f800000) >> 12) | ((rgb & 0x0003f000) >> 7) | ((rgb & 0x000000f8) >> 3); } bptr += rowstride; obuf += bpl; } } #endif static void xlib_rgb_convert_555 (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf; int bpl; unsigned char *bptr, *bp2; unsigned char r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; for (y = 0; y < height; y++) { bp2 = bptr; for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; ((unsigned short *)obuf)[x] = ((r & 0xf8) << 7) | ((g & 0xf8) << 2) | (b >> 3); } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_555_br (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf; int bpl; unsigned char *bptr, *bp2; unsigned char r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; for (y = 0; y < height; y++) { bp2 = bptr; for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; /* final word is: g5 g4 g3 b7 b6 b5 b4 b3 0 r7 r6 r5 r4 r3 g7 g6 */ ((unsigned short *)obuf)[x] = ((r & 0xf8) >> 1) | ((g & 0xc0) >> 6) | ((g & 0x18) << 10) | ((b & 0xf8) << 5); } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_888_msb (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int y; unsigned char *obuf; int bpl; unsigned char *bptr; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 3; for (y = 0; y < height; y++) { memcpy (obuf, bptr, (unsigned int)(width + width + width)); bptr += rowstride; obuf += bpl; } } /* todo: optimize this */ #if X_BYTE_ORDER == X_LITTLE_ENDIAN #define HAIRY_CONVERT_888 #endif #ifdef HAIRY_CONVERT_888 static void xlib_rgb_convert_888_lsb (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf, *obptr; int bpl; unsigned char *bptr, *bp2; int r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 3; for (y = 0; y < height; y++) { bp2 = bptr; obptr = obuf; if (((unsigned long)obuf | (unsigned long) bp2) & 3) { for (x = 0; x < width; x++) { r = bp2[0]; g = bp2[1]; b = bp2[2]; *obptr++ = b; *obptr++ = g; *obptr++ = r; bp2 += 3; } } else { for (x = 0; x < width - 3; x += 4) { unsigned int r1b0g0r0; unsigned int g2r2b1g1; unsigned int b3g3r3b2; r1b0g0r0 = ((unsigned int *)bp2)[0]; g2r2b1g1 = ((unsigned int *)bp2)[1]; b3g3r3b2 = ((unsigned int *)bp2)[2]; ((unsigned int *)obptr)[0] = (r1b0g0r0 & 0xff00) | ((r1b0g0r0 & 0xff0000) >> 16) | (((g2r2b1g1 & 0xff00) | (r1b0g0r0 & 0xff)) << 16); ((unsigned int *)obptr)[1] = (g2r2b1g1 & 0xff0000ff) | ((r1b0g0r0 & 0xff000000) >> 16) | ((b3g3r3b2 & 0xff) << 16); ((unsigned int *)obptr)[2] = (((g2r2b1g1 & 0xff0000) | (b3g3r3b2 & 0xff000000)) >> 16) | ((b3g3r3b2 & 0xff00) << 16) | ((b3g3r3b2 & 0xff0000)); bp2 += 12; obptr += 12; } for (; x < width; x++) { r = bp2[0]; g = bp2[1]; b = bp2[2]; *obptr++ = b; *obptr++ = g; *obptr++ = r; bp2 += 3; } } bptr += rowstride; obuf += bpl; } } #else static void xlib_rgb_convert_888_lsb (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf; int bpl; unsigned char *bptr, *bp2; int r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 3; for (y = 0; y < height; y++) { bp2 = bptr; for (x = 0; x < width; x++) { r = bp2[0]; g = bp2[1]; b = bp2[2]; obuf[x * 3] = b; obuf[x * 3 + 1] = g; obuf[x * 3 + 2] = r; bp2 += 3; } bptr += rowstride; obuf += bpl; } } #endif /* convert 24-bit packed to 32-bit unpacked */ /* todo: optimize this */ static void xlib_rgb_convert_0888 (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf; int bpl; unsigned char *bptr, *bp2; int r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 4; for (y = 0; y < height; y++) { bp2 = bptr; for (x = 0; x < width; x++) { r = bp2[0]; g = bp2[1]; b = bp2[2]; ((unsigned int *)obuf)[x] = (r << 16) | (g << 8) | b; bp2 += 3; } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_0888_br (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf; int bpl; unsigned char *bptr, *bp2; int r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 4; for (y = 0; y < height; y++) { bp2 = bptr; for (x = 0; x < width; x++) { r = bp2[0]; g = bp2[1]; b = bp2[2]; ((unsigned int *)obuf)[x] = (b << 24) | (g << 16) | (r << 8); bp2 += 3; } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_8880_br (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf; int bpl; unsigned char *bptr, *bp2; int r, g, b; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * 4; for (y = 0; y < height; y++) { bp2 = bptr; for (x = 0; x < width; x++) { r = bp2[0]; g = bp2[1]; b = bp2[2]; ((unsigned int *)obuf)[x] = (b << 16) | (g << 8) | r; bp2 += 3; } bptr += rowstride; obuf += bpl; } } /* Generic truecolor/directcolor conversion function. Slow, but these are oddball modes. */ static void xlib_rgb_convert_truecolor_lsb (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf, *obptr; int bpl; unsigned char *bptr, *bp2; int r, g, b; int r_right, r_left; int g_right, g_left; int b_right, b_left; int bpp; unsigned int pixel; int i; r_right = 8 - image_info->red_prec; r_left = image_info->red_shift; g_right = 8 - image_info->green_prec; g_left = image_info->green_shift; b_right = 8 - image_info->blue_prec; b_left = image_info->blue_shift; bpp = image_info->bpp; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * bpp; for (y = 0; y < height; y++) { obptr = obuf; bp2 = bptr; for (x = 0; x < width; x++) { r = bp2[0]; g = bp2[1]; b = bp2[2]; pixel = ((r >> r_right) << r_left) | ((g >> g_right) << g_left) | ((b >> b_right) << b_left); for (i = 0; i < bpp; i++) { *obptr++ = pixel & 0xff; pixel >>= 8; } bp2 += 3; } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_truecolor_lsb_d (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf, *obptr; int bpl; unsigned char *bptr, *bp2; int r, g, b; int r_right, r_left, r_prec; int g_right, g_left, g_prec; int b_right, b_left, b_prec; int bpp; unsigned int pixel; int i; int dith; int r1, g1, b1; const unsigned char *dmp; r_right = 8 - image_info->red_prec; r_left = image_info->red_shift; r_prec = image_info->red_prec; g_right = 8 - image_info->green_prec; g_left = image_info->green_shift; g_prec = image_info->green_prec; b_right = 8 - image_info->blue_prec; b_left = image_info->blue_shift; b_prec = image_info->blue_prec; bpp = image_info->bpp; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * bpp; for (y = 0; y < height; y++) { dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; obptr = obuf; bp2 = bptr; for (x = 0; x < width; x++) { r = bp2[0]; g = bp2[1]; b = bp2[2]; dith = dmp[(x_align + x) & (DM_WIDTH - 1)] << 2; r1 = r + (dith >> r_prec); g1 = g + ((252 - dith) >> g_prec); b1 = b + (dith >> b_prec); pixel = (((r1 - (r1 >> r_prec)) >> r_right) << r_left) | (((g1 - (g1 >> g_prec)) >> g_right) << g_left) | (((b1 - (b1 >> b_prec)) >> b_right) << b_left); for (i = 0; i < bpp; i++) { *obptr++ = pixel & 0xff; pixel >>= 8; } bp2 += 3; } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_truecolor_msb (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf, *obptr; int bpl; unsigned char *bptr, *bp2; int r, g, b; int r_right, r_left; int g_right, g_left; int b_right, b_left; int bpp; unsigned int pixel; int shift, shift_init; r_right = 8 - image_info->red_prec; r_left = image_info->red_shift; g_right = 8 - image_info->green_prec; g_left = image_info->green_shift; b_right = 8 - image_info->blue_prec; b_left = image_info->blue_shift; bpp = image_info->bpp; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * bpp; shift_init = (bpp - 1) << 3; for (y = 0; y < height; y++) { obptr = obuf; bp2 = bptr; for (x = 0; x < width; x++) { r = bp2[0]; g = bp2[1]; b = bp2[2]; pixel = ((r >> r_right) << r_left) | ((g >> g_right) << g_left) | ((b >> b_right) << b_left); for (shift = shift_init; shift >= 0; shift -= 8) { *obptr++ = (pixel >> shift) & 0xff; } bp2 += 3; } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_truecolor_msb_d (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; unsigned char *obuf, *obptr; int bpl; unsigned char *bptr, *bp2; int r, g, b; int r_right, r_left, r_prec; int g_right, g_left, g_prec; int b_right, b_left, b_prec; int bpp; unsigned int pixel; int shift, shift_init; int dith; int r1, g1, b1; const unsigned char *dmp; r_right = 8 - image_info->red_prec; r_left = image_info->red_shift; r_prec = image_info->red_prec; g_right = 8 - image_info->green_prec; g_left = image_info->green_shift; g_prec = image_info->green_prec; b_right = 8 - image_info->blue_prec; b_left = image_info->blue_shift; b_prec = image_info->blue_prec; bpp = image_info->bpp; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax * bpp; shift_init = (bpp - 1) << 3; for (y = 0; y < height; y++) { dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; obptr = obuf; bp2 = bptr; for (x = 0; x < width; x++) { r = bp2[0]; g = bp2[1]; b = bp2[2]; dith = dmp[(x_align + x) & (DM_WIDTH - 1)] << 2; r1 = r + (dith >> r_prec); g1 = g + ((252 - dith) >> g_prec); b1 = b + (dith >> b_prec); pixel = (((r1 - (r1 >> r_prec)) >> r_right) << r_left) | (((g1 - (g1 >> g_prec)) >> g_right) << g_left) | (((b1 - (b1 >> b_prec)) >> b_right) << b_left); for (shift = shift_init; shift >= 0; shift -= 8) { *obptr++ = (pixel >> shift) & 0xff; } bp2 += 3; } bptr += rowstride; obuf += bpl; } } /* This actually works for depths from 3 to 7 */ static void xlib_rgb_convert_4 (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; int r, g, b; const unsigned char *dmp; int dith; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax; for (y = 0; y < height; y++) { dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; bp2 = bptr; obptr = obuf; for (x = 0; x < width; x += 1) { r = *bp2++; g = *bp2++; b = *bp2++; dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 3; obptr[0] = colorcube_d[(((r + dith) & 0x100) >> 2) | (((g + 258 - dith) & 0x100) >> 5) | (((b + dith) & 0x100) >> 8)]; obptr++; } bptr += rowstride; obuf += bpl; } } /* This actually works for depths from 3 to 7 */ static void xlib_rgb_convert_gray4 (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; int r, g, b; int shift; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax; shift = 9 - image_info->x_visual_info->depth; for (y = 0; y < height; y++) { bp2 = bptr; obptr = obuf; for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; obptr[0] = (g + ((b + r) >> 1)) >> shift; obptr++; } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_gray4_pack (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; int r, g, b; int shift; unsigned char pix0, pix1; /* todo: this is hardcoded to big-endian. Make endian-agile. */ bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + (ax >> 1); shift = 9 - image_info->x_visual_info->depth; for (y = 0; y < height; y++) { bp2 = bptr; obptr = obuf; for (x = 0; x < width; x += 2) { r = *bp2++; g = *bp2++; b = *bp2++; pix0 = (g + ((b + r) >> 1)) >> shift; r = *bp2++; g = *bp2++; b = *bp2++; pix1 = (g + ((b + r) >> 1)) >> shift; obptr[0] = (pix0 << 4) | pix1; obptr++; } if (width & 1) { r = *bp2++; g = *bp2++; b = *bp2++; pix0 = (g + ((b + r) >> 1)) >> shift; obptr[0] = (pix0 << 4); } bptr += rowstride; obuf += bpl; } } /* This actually works for depths from 3 to 7 */ static void xlib_rgb_convert_gray4_d (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; int r, g, b; const unsigned char *dmp; int prec, right; int gray; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + ax; prec = image_info->x_visual_info->depth; right = 8 - prec; for (y = 0; y < height; y++) { bp2 = bptr; obptr = obuf; dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; gray = (g + ((b + r) >> 1)) >> 1; gray += (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) >> prec; obptr[0] = (gray - (gray >> prec)) >> right; obptr++; } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_gray4_d_pack (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; int r, g, b; const unsigned char *dmp; int prec, right; int gray; unsigned char pix0, pix1; /* todo: this is hardcoded to big-endian. Make endian-agile. */ bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + (ax >> 1); prec = image_info->x_visual_info->depth; right = 8 - prec; for (y = 0; y < height; y++) { bp2 = bptr; obptr = obuf; dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; for (x = 0; x < width; x += 2) { r = *bp2++; g = *bp2++; b = *bp2++; gray = (g + ((b + r) >> 1)) >> 1; gray += (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) >> prec; pix0 = (gray - (gray >> prec)) >> right; r = *bp2++; g = *bp2++; b = *bp2++; gray = (g + ((b + r) >> 1)) >> 1; gray += (dmp[(x_align + x + 1) & (DM_WIDTH - 1)] << 2) >> prec; pix1 = (gray - (gray >> prec)) >> right; obptr[0] = (pix0 << 4) | pix1; obptr++; } if (width & 1) { r = *bp2++; g = *bp2++; b = *bp2++; gray = (g + ((b + r) >> 1)) >> 1; gray += (dmp[(x_align + x + 1) & (DM_WIDTH - 1)] << 2) >> prec; pix0 = (gray - (gray >> prec)) >> right; obptr[0] = (pix0 << 4); } bptr += rowstride; obuf += bpl; } } static void xlib_rgb_convert_1 (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { int x, y; int bpl; unsigned char *obuf, *obptr; unsigned char *bptr, *bp2; int r, g, b; const unsigned char *dmp; int dith; unsigned char byte; bptr = buf; bpl = image->bytes_per_line; obuf = ((unsigned char *)image->data) + ay * bpl + (ax >> 3); byte = 0; /* unnecessary, but it keeps gcc from complaining */ for (y = 0; y < height; y++) { dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; bp2 = bptr; obptr = obuf; for (x = 0; x < width; x++) { r = *bp2++; g = *bp2++; b = *bp2++; dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 4) | 4; byte += byte + (r + g + g + b + dith > 1020); if ((x & 7) == 7) { obptr[0] = byte; obptr++; } } if (x & 7) obptr[0] = byte << (8 - (x & 7)); bptr += rowstride; obuf += bpl; } } /* Returns a pointer to the stage buffer. */ static unsigned char * xlib_rgb_ensure_stage (void) { if (image_info->stage_buf == NULL) image_info->stage_buf = malloc (IMAGE_HEIGHT * STAGE_ROWSTRIDE); return image_info->stage_buf; } /* This is slow. Speed me up, please. */ static void xlib_rgb_32_to_stage (unsigned char *buf, int rowstride, int width, int height) { int x, y; unsigned char *pi_start, *po_start; unsigned char *pi, *po; pi_start = buf; po_start = xlib_rgb_ensure_stage (); for (y = 0; y < height; y++) { pi = pi_start; po = po_start; for (x = 0; x < width; x++) { *po++ = *pi++; *po++ = *pi++; *po++ = *pi++; pi++; } pi_start += rowstride; po_start += STAGE_ROWSTRIDE; } } /* Generic 32bit RGB conversion function - convert to 24bit packed, then go from there. */ static void xlib_rgb_convert_32_generic (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { xlib_rgb_32_to_stage (buf, rowstride, width, height); (*image_info->conv) (image, ax, ay, width, height, image_info->stage_buf, STAGE_ROWSTRIDE, x_align, y_align, cmap); } /* Generic 32bit RGB conversion function - convert to 24bit packed, then go from there. */ static void xlib_rgb_convert_32_generic_d (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { xlib_rgb_32_to_stage (buf, rowstride, width, height); (*image_info->conv_d) (image, ax, ay, width, height, image_info->stage_buf, STAGE_ROWSTRIDE, x_align, y_align, cmap); } /* This is slow. Speed me up, please. */ static void xlib_rgb_gray_to_stage (unsigned char *buf, int rowstride, int width, int height) { int x, y; unsigned char *pi_start, *po_start; unsigned char *pi, *po; unsigned char gray; pi_start = buf; po_start = xlib_rgb_ensure_stage (); for (y = 0; y < height; y++) { pi = pi_start; po = po_start; for (x = 0; x < width; x++) { gray = *pi++; *po++ = gray; *po++ = gray; *po++ = gray; } pi_start += rowstride; po_start += STAGE_ROWSTRIDE; } } /* Generic gray conversion function - convert to 24bit packed, then go from there. */ static void xlib_rgb_convert_gray_generic (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { xlib_rgb_gray_to_stage (buf, rowstride, width, height); (*image_info->conv) (image, ax, ay, width, height, image_info->stage_buf, STAGE_ROWSTRIDE, x_align, y_align, cmap); } static void xlib_rgb_convert_gray_generic_d (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { xlib_rgb_gray_to_stage (buf, rowstride, width, height); (*image_info->conv_d) (image, ax, ay, width, height, image_info->stage_buf, STAGE_ROWSTRIDE, x_align, y_align, cmap); } /* Render grayscale using indexed method. */ static void xlib_rgb_convert_gray_cmap (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { (*image_info->conv_indexed) (image, ax, ay, width, height, buf, rowstride, x_align, y_align, image_info->gray_cmap); } #if 0 static void xlib_rgb_convert_gray_cmap_d (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { (*image_info->conv_indexed_d) (image, ax, ay, width, height, buf, rowstride, x_align, y_align, image_info->gray_cmap); } #endif /* This is slow. Speed me up, please. */ static void xlib_rgb_indexed_to_stage (unsigned char *buf, int rowstride, int width, int height, XlibRgbCmap *cmap) { int x, y; unsigned char *pi_start, *po_start; unsigned char *pi, *po; int rgb; pi_start = buf; po_start = xlib_rgb_ensure_stage (); for (y = 0; y < height; y++) { pi = pi_start; po = po_start; for (x = 0; x < width; x++) { rgb = cmap->colors[*pi++]; *po++ = rgb >> 16; *po++ = (rgb >> 8) & 0xff; *po++ = rgb & 0xff; } pi_start += rowstride; po_start += STAGE_ROWSTRIDE; } } /* Generic gray conversion function - convert to 24bit packed, then go from there. */ static void xlib_rgb_convert_indexed_generic (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { xlib_rgb_indexed_to_stage (buf, rowstride, width, height, cmap); (*image_info->conv) (image, ax, ay, width, height, image_info->stage_buf, STAGE_ROWSTRIDE, x_align, y_align, cmap); } static void xlib_rgb_convert_indexed_generic_d (XImage *image, int ax, int ay, int width, int height, unsigned char *buf, int rowstride, int x_align, int y_align, XlibRgbCmap *cmap) { xlib_rgb_indexed_to_stage (buf, rowstride, width, height, cmap); (*image_info->conv_d) (image, ax, ay, width, height, image_info->stage_buf, STAGE_ROWSTRIDE, x_align, y_align, cmap); } /* Select a conversion function based on the visual and a representative image. */ static void xlib_rgb_select_conv (XImage *image, ByteOrder byte_order) { int depth, byterev; int vtype; /* visual type */ int bpp; /* bits per pixel - from the visual */ unsigned int red_mask, green_mask, blue_mask; XlibRgbConvFunc conv, conv_d; XlibRgbConvFunc conv_32, conv_32_d; XlibRgbConvFunc conv_gray, conv_gray_d; XlibRgbConvFunc conv_indexed, conv_indexed_d; Bool mask_rgb, mask_bgr; depth = image_info->x_visual_info->depth; bpp = image->bits_per_pixel; if (xlib_rgb_verbose) printf ("Chose visual 0x%x, image bpp=%d, %s first\n", (int)image_info->x_visual_info->visual->visualid, bpp, byte_order == LSB_FIRST ? "lsb" : "msb"); #if X_BYTE_ORDER == X_BIG_ENDIAN byterev = (byte_order == LSB_FIRST); #else byterev = (byte_order == MSB_FIRST); #endif vtype = image_info->x_visual_info->class; if (vtype == DirectColor) vtype = TrueColor; red_mask = image_info->x_visual_info->red_mask; green_mask = image_info->x_visual_info->green_mask; blue_mask = image_info->x_visual_info->blue_mask; mask_rgb = red_mask == 0xff0000 && green_mask == 0xff00 && blue_mask == 0xff; mask_bgr = red_mask == 0xff && green_mask == 0xff00 && blue_mask == 0xff0000; conv = NULL; conv_d = NULL; conv_32 = xlib_rgb_convert_32_generic; conv_32_d = xlib_rgb_convert_32_generic_d; conv_gray = xlib_rgb_convert_gray_generic; conv_gray_d = xlib_rgb_convert_gray_generic_d; conv_indexed = xlib_rgb_convert_indexed_generic; conv_indexed_d = xlib_rgb_convert_indexed_generic_d; image_info->dith_default = FALSE; if (image_info->bitmap) conv = xlib_rgb_convert_1; else if (bpp == 16 && depth == 16 && !byterev && red_mask == 0xf800 && green_mask == 0x7e0 && blue_mask == 0x1f) { conv = xlib_rgb_convert_565; conv_d = xlib_rgb_convert_565_d; conv_gray = xlib_rgb_convert_565_gray; xlib_rgb_preprocess_dm_565 (); } else if (bpp == 16 && depth == 16 && vtype == TrueColor&& byterev && red_mask == 0xf800 && green_mask == 0x7e0 && blue_mask == 0x1f) conv = xlib_rgb_convert_565_br; else if (bpp == 16 && depth == 15 && vtype == TrueColor && !byterev && red_mask == 0x7c00 && green_mask == 0x3e0 && blue_mask == 0x1f) conv = xlib_rgb_convert_555; else if (bpp == 16 && depth == 15 && vtype == TrueColor && byterev && red_mask == 0x7c00 && green_mask == 0x3e0 && blue_mask == 0x1f) conv = xlib_rgb_convert_555_br; /* I'm not 100% sure about the 24bpp tests - but testing will show*/ else if (bpp == 24 && depth == 24 && vtype == TrueColor && ((mask_rgb && byte_order == LSB_FIRST) || (mask_bgr && byte_order == MSB_FIRST))) conv = xlib_rgb_convert_888_lsb; else if (bpp == 24 && depth == 24 && vtype == TrueColor && ((mask_rgb && byte_order == MSB_FIRST) || (mask_bgr && byte_order == LSB_FIRST))) conv = xlib_rgb_convert_888_msb; #if X_BYTE_ORDER == X_BIG_ENDIAN else if (bpp == 32 && depth == 24 && vtype == TrueColor && (mask_rgb && byte_order == LSB_FIRST)) conv = xlib_rgb_convert_0888_br; else if (bpp == 32 && depth == 24 && vtype == TrueColor && (mask_rgb && byte_order == MSB_FIRST)) conv = xlib_rgb_convert_0888; else if (bpp == 32 && depth == 24 && vtype == TrueColor && (mask_bgr && byte_order == MSB_FIRST)) conv = xlib_rgb_convert_8880_br; #else else if (bpp == 32 && depth == 24 && vtype == TrueColor && (mask_rgb && byte_order == MSB_FIRST)) conv = xlib_rgb_convert_0888_br; else if (bpp == 32 && (depth == 32 || depth == 24) && vtype == TrueColor && (mask_rgb && byte_order == LSB_FIRST)) conv = xlib_rgb_convert_0888; else if (bpp == 32 && depth == 24 && vtype == TrueColor && (mask_bgr && byte_order == LSB_FIRST)) conv = xlib_rgb_convert_8880_br; #endif else if (vtype == TrueColor && byte_order == LSB_FIRST) { conv = xlib_rgb_convert_truecolor_lsb; conv_d = xlib_rgb_convert_truecolor_lsb_d; } else if (vtype == TrueColor && byte_order == MSB_FIRST) { conv = xlib_rgb_convert_truecolor_msb; conv_d = xlib_rgb_convert_truecolor_msb_d; } else if (bpp == 8 && depth == 8 && (vtype == PseudoColor #ifdef ENABLE_GRAYSCALE || vtype == GrayScale #endif )) { image_info->dith_default = TRUE; conv = xlib_rgb_convert_8; if (vtype != GrayScale) { if (image_info->nred_shades == 6 && image_info->ngreen_shades == 6 && image_info->nblue_shades == 6) conv_d = xlib_rgb_convert_8_d666; else conv_d = xlib_rgb_convert_8_d; } conv_indexed = xlib_rgb_convert_8_indexed; conv_gray = xlib_rgb_convert_gray_cmap; } else if (bpp == 8 && depth == 8 && (vtype == StaticGray #ifdef not_ENABLE_GRAYSCALE || vtype == GrayScale #endif )) { conv = xlib_rgb_convert_gray8; conv_gray = xlib_rgb_convert_gray8_gray; } else if (bpp == 8 && depth < 8 && depth >= 2 && (vtype == StaticGray || vtype == GrayScale)) { conv = xlib_rgb_convert_gray4; conv_d = xlib_rgb_convert_gray4_d; } else if (bpp == 8 && depth < 8 && depth >= 3) { conv = xlib_rgb_convert_4; } else if (bpp == 4 && depth <= 4 && depth >= 2 && (vtype == StaticGray || vtype == GrayScale)) { conv = xlib_rgb_convert_gray4_pack; conv_d = xlib_rgb_convert_gray4_d_pack; } if (conv_d == NULL) conv_d = conv; image_info->conv = conv; image_info->conv_d = conv_d; image_info->conv_32 = conv_32; image_info->conv_32_d = conv_32_d; image_info->conv_gray = conv_gray; image_info->conv_gray_d = conv_gray_d; image_info->conv_indexed = conv_indexed; image_info->conv_indexed_d = conv_indexed_d; } static int horiz_idx; static int horiz_y = IMAGE_HEIGHT; static int vert_idx; static int vert_x = IMAGE_WIDTH; static int tile_idx; static int tile_x = IMAGE_WIDTH; static int tile_y1 = IMAGE_HEIGHT; static int tile_y2 = IMAGE_HEIGHT; #ifdef VERBOSE static int sincelast; #endif /* Defining NO_FLUSH can cause inconsistent screen updates, but is useful for performance evaluation. */ #undef NO_FLUSH static int xlib_rgb_alloc_scratch_image (void) { if (static_image_idx == N_IMAGES) { #ifndef NO_FLUSH XFlush(image_info->display); #endif #ifdef VERBOSE printf ("flush, %d puts since last flush\n", sincelast); sincelast = 0; #endif static_image_idx = 0; horiz_y = IMAGE_HEIGHT; vert_x = IMAGE_WIDTH; tile_x = IMAGE_WIDTH; tile_y1 = tile_y2 = IMAGE_HEIGHT; } return static_image_idx++; } static XImage * xlib_rgb_alloc_scratch (int width, int height, int *ax, int *ay) { XImage *image; int idx; if (width >= (IMAGE_WIDTH >> 1)) { if (height >= (IMAGE_HEIGHT >> 1)) { idx = xlib_rgb_alloc_scratch_image (); *ax = 0; *ay = 0; } else { if (height + horiz_y > IMAGE_HEIGHT) { horiz_idx = xlib_rgb_alloc_scratch_image (); horiz_y = 0; } idx = horiz_idx; *ax = 0; *ay = horiz_y; horiz_y += height; } } else { if (height >= (IMAGE_HEIGHT >> 1)) { if (width + vert_x > IMAGE_WIDTH) { vert_idx = xlib_rgb_alloc_scratch_image (); vert_x = 0; } idx = vert_idx; *ax = vert_x; *ay = 0; /* using 3 and -4 would be slightly more efficient on 32-bit machines with > 1bpp displays */ vert_x += (width + 7) & -8; } else { if (width + tile_x > IMAGE_WIDTH) { tile_y1 = tile_y2; tile_x = 0; } if (height + tile_y1 > IMAGE_HEIGHT) { tile_idx = xlib_rgb_alloc_scratch_image (); tile_x = 0; tile_y1 = 0; tile_y2 = 0; } if (height + tile_y1 > tile_y2) tile_y2 = height + tile_y1; idx = tile_idx; *ax = tile_x; *ay = tile_y1; tile_x += (width + 7) & -8; } } image = static_image[idx]; #ifdef VERBOSE printf ("index %d, x %d, y %d (%d x %d)\n", idx, *ax, *ay, width, height); sincelast++; #endif return image; } static void xlib_draw_rgb_image_core (Drawable drawable, GC gc, int x, int y, int width, int height, unsigned char *buf, int pixstride, int rowstride, XlibRgbConvFunc conv, XlibRgbCmap *cmap, int xdith, int ydith) { int ay, ax; int xs0, ys0; XImage *image; int width1, height1; unsigned char *buf_ptr; if (image_info->bitmap) { if (image_info->own_gc == 0) { XColor color; image_info->own_gc = XCreateGC(image_info->display, drawable, 0, NULL); color.pixel = WhitePixel(image_info->display, image_info->screen_num); XSetForeground(image_info->display, image_info->own_gc, color.pixel); color.pixel = BlackPixel(image_info->display, image_info->screen_num); XSetBackground(image_info->display, image_info->own_gc, color.pixel); } gc = image_info->own_gc; } for (ay = 0; ay < height; ay += IMAGE_HEIGHT) { height1 = MIN (height - ay, IMAGE_HEIGHT); for (ax = 0; ax < width; ax += IMAGE_WIDTH) { width1 = MIN (width - ax, IMAGE_WIDTH); buf_ptr = buf + ay * rowstride + ax * pixstride; image = xlib_rgb_alloc_scratch (width1, height1, &xs0, &ys0); conv (image, xs0, ys0, width1, height1, buf_ptr, rowstride, x + ax + xdith, y + ay + ydith, cmap); #ifndef DONT_ACTUALLY_DRAW XPutImage(image_info->display, drawable, gc, image, xs0, ys0, x + ax, y + ay, (unsigned int)width1, (unsigned int)height1); #endif } } } /** * xlib_draw_rgb_image: * @drawable: Destination drawable. * @gc: A graphic context. * @x: Leftmost coordinate of the destination rectangle. * @y: Upper coordinate of the destination rectangle. * @width: Width of the destination rectangle, in pixels. * @height: Height of the destination rectangle, in pixels. * @dith: Dithering method to use. * @rgb_buf: Pointer to the pixel in the RGB buffer that corresponds to the * upper-left corner of the rectangular region to render. * @rowstride: Offset between pixel rows in the RGB buffer, in bytes. * * Renders an RGB buffer to a drawable. Pixels are specified as RGB triplets * with 8 bits per channel. An image will thus look like an RGBRGBRGBRGB * sequence of 8-bit values. This function does not let you specify dither * offsets; applications that need to render partial regions of a buffer to * build the final image should use xlib_draw_rgb_image_dithalign() instead. **/ void xlib_draw_rgb_image (Drawable drawable, GC gc, int x, int y, int width, int height, XlibRgbDither dith, unsigned char *rgb_buf, int rowstride) { if (dith == XLIB_RGB_DITHER_NONE || (dith == XLIB_RGB_DITHER_NORMAL && !image_info->dith_default)) xlib_draw_rgb_image_core (drawable, gc, x, y, width, height, rgb_buf, 3, rowstride, image_info->conv, NULL, 0, 0); else xlib_draw_rgb_image_core (drawable, gc, x, y, width, height, rgb_buf, 3, rowstride, image_info->conv_d, NULL, 0, 0); } /** * xlib_rgb_cmap_free: * @cmap: An XlibRGB colormap. * * Frees an XlibRGB colormap. **/ void xlib_rgb_cmap_free (XlibRgbCmap *cmap) { free (cmap); } /** * xlib_draw_indexed_image: * @drawable: FIXME * @gc: FIXME * @x: FIXME * @y: FIXME * @width: FIXME * @height: FIXME * @dith: FIXME * @buf: FIXME * @rowstride: FIXME * @cmap: FIXME * * FIXME **/ void xlib_draw_indexed_image (Drawable drawable, GC gc, int x, int y, int width, int height, XlibRgbDither dith, unsigned char *buf, int rowstride, XlibRgbCmap *cmap) { if (dith == XLIB_RGB_DITHER_NONE || (dith == XLIB_RGB_DITHER_NORMAL && !image_info->dith_default)) xlib_draw_rgb_image_core (drawable, gc, x, y, width, height, buf, 1, rowstride, image_info->conv_indexed, cmap, 0, 0); else xlib_draw_rgb_image_core (drawable, gc, x, y, width, height, buf, 1, rowstride, image_info->conv_indexed_d, cmap, 0, 0); } /** * xlib_rgb_ditherable: * * Queries whether XlibRGB supports dithering for its chosen visual. * * Return value: TRUE if dithering can be performed for the visual that XlibRGB * is using, FALSE otherwise. **/ Bool xlib_rgb_ditherable (void) { return (image_info->conv != image_info->conv_d); } /** * xlib_rgb_get_cmap: * * Queries the X colormap that XlibRGB is using. * * Return value: An X colormap. **/ Colormap xlib_rgb_get_cmap (void) { /* xlib_rgb_init (); */ if (image_info) return image_info->cmap; else return 0; } /** * xlib_rgb_get_visual: * * Queries the visual that XlibRGB is using. * * Return value: An X visual. **/ Visual * xlib_rgb_get_visual (void) { /* xlib_rgb_init (); */ if (image_info) return image_info->x_visual_info->visual; else return 0; } /** * xlib_rgb_get_visual_info: * * Queries the visual info structure for the visual that XlibRGB is using. * * Return value: An XVisualInfo structure. **/ XVisualInfo * xlib_rgb_get_visual_info (void) { /* xlib_rgb_init (); */ if (image_info) return image_info->x_visual_info; else return 0; } /** * xlib_rgb_get_depth: * * Queries the depth of the visual that XlibRGB is using. * * Return value: Bit depth. **/ int xlib_rgb_get_depth (void) { XVisualInfo * v = xlib_rgb_get_visual_info(); if (v) { return v->depth; } return 0; } /** * xlib_rgb_get_display: * * Queries the X display that XlibRGB is using. * * Return value: An X display. **/ Display * xlib_rgb_get_display (void) { if (image_info) return image_info->display; return NULL; } /** * xlib_rgb_get_screen: * * Queries the screen that XlibRGB is using. * * Return value: An X screen. **/ Screen * xlib_rgb_get_screen (void) { if (image_info) return image_info->screen; return NULL; }