GUACAMOLE-249: Remove unnecessary bitmap conversion - will happen automatically when FreeRDP invokes bitmap->Decompress().

src/protocols/rdp/bitmap.c

@@ -37,31 +37,6 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-BOOL guac_rdp_bitmap_convert(rdpContext* context, rdpBitmap* bitmap) {
-
-    /* No need to convert if there is no image data or the image data is
-     * already in the format used by libguac (the format used by Cairo) */
-    if (bitmap->data == NULL || bitmap->format == PIXEL_FORMAT_BGRX32)
-        return TRUE;
-
-    /* Allocate sufficient space for converted image */
-    unsigned char* image_buffer = _aligned_malloc(bitmap->width * bitmap->height * 4, 16);
-
-    /* Attempt image conversion, replacing existing image data if successful */
-    if (freerdp_image_copy(image_buffer, PIXEL_FORMAT_BGRX32, 0, 0, 0,
-            bitmap->width, bitmap->height, bitmap->data, bitmap->format,
-            0, 0, 0, &context->gdi->palette, FREERDP_FLIP_NONE)) {
-        _aligned_free(bitmap->data);
-        bitmap->data = image_buffer;
-        bitmap->format = PIXEL_FORMAT_BGRX32;
-        return TRUE;
-    }
-
-    _aligned_free(image_buffer);
-    return FALSE;
-
-}
-
 BOOL guac_rdp_cache_bitmap(rdpContext* context, rdpBitmap* bitmap) {
 
     guac_client* client = ((rdp_freerdp_context*) context)->client;
@@ -74,9 +49,6 @@ BOOL guac_rdp_cache_bitmap(rdpContext* context, rdpBitmap* bitmap) {
     /* Cache image data if present */
     if (bitmap->data != NULL) {
 
-        /* Convert image data to format used by libguac */
-        guac_rdp_bitmap_convert(context, bitmap);
-
         /* Create surface from image data */
         cairo_surface_t* image = cairo_image_surface_create_for_data(
             bitmap->data, CAIRO_FORMAT_RGB24,
@@ -99,9 +71,6 @@ BOOL guac_rdp_cache_bitmap(rdpContext* context, rdpBitmap* bitmap) {
 
 BOOL guac_rdp_bitmap_new(rdpContext* context, rdpBitmap* bitmap) {
 
-    /* Convert image data to format used by libguac */
-    guac_rdp_bitmap_convert(context, bitmap);
-
     /* No corresponding surface yet - caching is deferred. */
     ((guac_rdp_bitmap*) bitmap)->layer = NULL;
 
@@ -135,9 +104,6 @@ BOOL guac_rdp_bitmap_paint(rdpContext* context, rdpBitmap* bitmap) {
     /* Otherwise, draw with stored image data */
     else if (bitmap->data != NULL) {
 
-        /* Convert image data to format used by libguac */
-        guac_rdp_bitmap_convert(context, bitmap);
-
         /* Create surface from image data */
         cairo_surface_t* image = cairo_image_surface_create_for_data(
             bitmap->data, CAIRO_FORMAT_RGB24,

src/protocols/rdp/bitmap.h

@@ -49,25 +49,6 @@ typedef struct guac_rdp_bitmap {
 
 } guac_rdp_bitmap;
 
-/**
- * Converts the image data within the given rdpBitmap to the pixel format used
- * by libguac (Cairo) for 24-bit RGB images lacking an alpha channel. Any
- * existing image data within the bitmap is freed and replaced with
- * newly-allocated image data in the needed format, and the format field of the
- * rdpBitmap is updated to match.
- *
- * @param context
- *     The rdpContext associated with the current RDP session.
- *
- * @param bitmap
- *     The rdpBitmap to convert.
- *
- * @return
- *     TRUE if image conversion was successful or there was no image data to
- *     convert, FALSE otherwise.
- */
-BOOL guac_rdp_bitmap_convert(rdpContext* context, rdpBitmap* bitmap);
-
 /**
  * Caches the given bitmap immediately, storing its data in a remote Guacamole
  * buffer. As RDP bitmaps are frequently created, used once, and immediately

src/protocols/rdp/gdi.c

@@ -274,9 +274,6 @@ BOOL guac_rdp_gdi_memblt(rdpContext* context, MEMBLT_ORDER* memblt) {
             if (bitmap->layer == NULL) {
                 if (memblt->bitmap->data != NULL) {
 
-                    /* Convert image data to format used by libguac */
-                    guac_rdp_bitmap_convert(context, memblt->bitmap);
-
                     /* Create surface from image data */
                     cairo_surface_t* surface = cairo_image_surface_create_for_data(
                         memblt->bitmap->data + 4*(x_src + y_src*memblt->bitmap->width),