work on 32 bit planar bitmap compressor

1 files changed, 60 insertions, 1 deletions

diff --git a/libxrdp/xrdp_bitmap32_compress.c b/libxrdp/xrdp_bitmap32_compress.c
index b681d040..b1aaaa9a 100644
--- a/libxrdp/xrdp_bitmap32_compress.c
+++ b/libxrdp/xrdp_bitmap32_compress.c
@@ -19,14 +19,73 @@
  * 32 bpp compression
  */
 
+/*
+RDP 6.0 Bitmap Compression
+http://msdn.microsoft.com/en-us/library/cc241877.aspx
+*/
+
 #include "libxrdp.h"
 
 /*****************************************************************************/
+/* returns the number of lines compressed */
 int APP_CC
 xrdp_bitmap32_compress(char *in_data, int width, int height,
                        struct stream *s, int bpp, int byte_limit,
                        int start_line, struct stream *temp_s,
                        int e)
 {
-    return 0;
+    int pixel;
+    int *ptr32;
+    char *ptr8;
+    char *alpha_data;
+    char *red_data;
+    char *green_data;
+    char *blue_data;
+    int alpha_bytes;
+    int red_bytes;
+    int green_bytes;
+    int blue_bytes;
+    int iindex;
+    int jindex;
+    int cx;
+    int cy;
+
+    alpha_data = g_malloc(width * height * 4, 0);
+    red_data = alpha_data + width * height;
+    green_data = red_data + width * height;
+    blue_data = green_data + width * height;
+    alpha_bytes = 0;
+    red_bytes = 0;
+    green_bytes = 0;
+    blue_bytes = 0;
+    cx = width;
+    cy = 0;
+
+    /* split planes */
+    while (start_line >= 0)
+    {
+        ptr32 = (int *) (in_data + start_line * width * 4);
+        for (iindex = 0; iindex < width; iindex++)
+        {
+            pixel = *ptr32;
+            ptr32++;
+            alpha_data[alpha_bytes] = pixel >> 24;
+            alpha_bytes++;
+            red_data[red_bytes] = pixel >> 16;
+            red_bytes++;
+            green_data[green_bytes] = pixel >> 8;
+            green_bytes++;
+            blue_data[blue_bytes] = pixel >> 0;
+            blue_bytes++;
+        }
+        start_line--;
+        cy++;
+    }
+    out_uint8(s, 0x20); /* no alpha */
+    out_uint8a(s, red_data, red_bytes);
+    out_uint8a(s, green_data, green_bytes);
+    out_uint8a(s, blue_data, blue_bytes);
+    out_uint8(s, 0x00);
+    g_free(alpha_data);
+    return cy;
 }