Add SET_PIXEL_FORMAT environ.

driver.c

@@ -397,6 +397,12 @@ static void init_filter(void)
    if (*g_settings.video.filter_path == '\0')
       return;
 
+   if (g_extern.system.rgb32)
+   {
+      RARCH_WARN("libretro implementation uses XRGB8888 format. CPU filters only support 0RGB1555.\n");
+      return;
+   }
+
    RARCH_LOG("Loading bSNES filter from \"%s\"\n", g_settings.video.filter_path);
    g_extern.filter.lib = dylib_load(g_settings.video.filter_path);
    if (!g_extern.filter.lib)
@@ -553,7 +559,7 @@ void init_video_input(void)
    video.force_aspect = g_settings.video.force_aspect;
    video.smooth = g_settings.video.smooth;
    video.input_scale = scale;
-   video.rgb32 = g_extern.filter.active;
+   video.rgb32 = g_extern.filter.active || g_extern.system.rgb32;
 
    const input_driver_t *tmp = driver.input;
    driver.video_data = video_init_func(&video, &driver.input, &driver.input_data);

dynamic.c

@@ -331,6 +331,31 @@ static bool environment_cb(unsigned cmd, void *data)
          RARCH_LOG("Environ SYSTEM_DIRECTORY: \"%s\".\n", g_settings.system_directory);
          break;
 
+      case RETRO_ENVIRONMENT_SET_PIXEL_FORMAT:
+      {
+         enum retro_pixel_format pix_fmt = *(const enum retro_pixel_format*)data;
+         bool rgb32 = false;
+         switch (pix_fmt)
+         {
+            case RETRO_PIXEL_FORMAT_0RGB1555:
+               rgb32 = false;
+               RARCH_LOG("Environ SET_PIXEL_FORMAT: 0RGB1555.\n");
+               break;
+
+#ifndef RARCH_CONSOLE
+            case RETRO_PIXEL_FORMAT_XRGB8888:
+               rgb32 = true;
+               RARCH_LOG("Environ SET_PIXEL_FORMAT: XRGB8888.\n");
+               break;
+#endif
+            default:
+               return false;
+         }
+         
+         g_extern.system.rgb32 = rgb32;
+         break;
+      }
+
       default:
          RARCH_LOG("Environ UNSUPPORTED (#%u).\n", cmd);
          return false;

general.h

@@ -332,6 +332,7 @@ struct global
       unsigned rotation;
       bool shutdown;
       unsigned performance_level;
+      bool rgb32;
    } system;
 
    struct

libretro.h

@@ -150,7 +150,19 @@ extern "C" {
                                            // The returned value can be NULL.
                                            // If so, no such directory is defined,
                                            // and it's up to the implementation to find a suitable directory.
+                                           //
+#define RETRO_ENVIRONMENT_SET_PIXEL_FORMAT 10
+                                           // const enum retro_pixel_format * --
+                                           // Sets the internal pixel format used by the implementation.
+                                           // The default pixel format is RETRO_PIXEL_FORMAT_XRGB1555.
+                                           // If the call returns false, the frontend does not support this pixel format.
+                                           // This function should be called inside retro_load_game() or retro_get_system_av_info().
 
+enum retro_pixel_format
+{
+   RETRO_PIXEL_FORMAT_0RGB1555 = 0, // 0RGB1555, native endian. 0 bit must be set to 0.
+   RETRO_PIXEL_FORMAT_XRGB8888      // XRGB8888, native endian. X bits are ignored.
+};
 
 struct retro_message
 {
@@ -225,7 +237,7 @@ struct retro_game_info
 // Environment callback. Gives implementations a way of performing uncommon tasks. Extensible.
 typedef bool (*retro_environment_t)(unsigned cmd, void *data);
 
-// Render a frame. Pixel format is 15-bit XRGB1555 native endian.
+// Render a frame. Pixel format is 15-bit 0RGB1555 native endian unless changed (see RETRO_ENVIRONMENT_SET_PIXEL_FORMAT).
 // Width and height specify dimensions of buffer.
 // Pitch specifices length in bytes between two lines in buffer.
 typedef void (*retro_video_refresh_t)(const void *data, unsigned width, unsigned height, size_t pitch);

retroarch.c

@@ -1171,7 +1171,7 @@ static void init_recording(void)
    params.filename   = g_extern.record_path;
    params.fps        = fps;
    params.samplerate = samplerate;
-   params.rgb32      = false;
+   params.rgb32      = g_extern.system.rgb32;
 
    if (g_extern.record_width || g_extern.record_height)
    {