add a read_frame_raw callback to the video_driver_t structure.

gfx/d3d/d3d.cpp

@@ -1966,6 +1966,7 @@ video_driver_t video_d3d = {
    d3d_set_rotation,
    d3d_viewport_info,
    d3d_read_viewport,
+   NULL, /* read_frame_raw */
 #ifdef HAVE_OVERLAY
    d3d_get_overlay_interface,
 #endif

gfx/drivers/dispmanx_gfx.c

@@ -769,6 +769,7 @@ video_driver_t video_dispmanx = {
 	dispmanx_gfx_set_rotation,
 	dispmanx_gfx_viewport_info,
 	dispmanx_gfx_read_viewport,
+   NULL, /* read_frame_raw */
 
 #ifdef HAVE_OVERLAY
 	NULL, /* overlay_interface */

gfx/drivers/exynos_gfx.c

@@ -1673,6 +1673,7 @@ video_driver_t video_exynos = {
   exynos_gfx_set_rotation,
   exynos_gfx_viewport_info,
   exynos_gfx_read_viewport,
+  NULL, /* read_frame_raw */
 
 #ifdef HAVE_OVERLAY
   NULL, /* overlay_interface */

gfx/drivers/gl.c

@@ -3163,6 +3163,7 @@ video_driver_t video_gl = {
    gl_viewport_info,
 
    gl_read_viewport,
+   NULL, /* read_frame_raw */
 
 #ifdef HAVE_OVERLAY
    gl_get_overlay_interface,

gfx/drivers/gx_gfx.c

@@ -1503,6 +1503,7 @@ video_driver_t video_gx = {
    gx_set_rotation,
    gx_viewport_info,
    gx_read_viewport,
+   NULL, /* read_frame_raw */
 #ifdef HAVE_OVERLAY
    gx_get_overlay_interface,
 #endif

gfx/drivers/nullgfx.c

@@ -130,6 +130,7 @@ video_driver_t video_null = {
    null_gfx_set_rotation,
    null_gfx_viewport_info,
    null_gfx_read_viewport,
+   NULL, /* read_frame_raw */
 
 #ifdef HAVE_OVERLAY
   NULL, /* overlay_interface */

gfx/drivers/omap_gfx.c

@@ -1171,6 +1171,7 @@ video_driver_t video_omap = {
   omap_gfx_set_rotation,
   omap_gfx_viewport_info,
   omap_gfx_read_viewport,
+  NULL, /* read_frame_raw */
 
 #ifdef HAVE_OVERLAY
   NULL, /* overlay_interface */

gfx/drivers/psp1_gfx.c

@@ -973,6 +973,7 @@ video_driver_t video_psp1 = {
    psp_set_rotation,
    psp_viewport_info,
    psp_read_viewport,
+   NULL, /* read_frame_raw */
 #ifdef HAVE_OVERLAY
    NULL,
 #endif

gfx/drivers/sdl2_gfx.c

@@ -769,6 +769,7 @@ video_driver_t video_sdl2 = {
    sdl2_gfx_set_rotation,
    sdl2_gfx_viewport_info,
    sdl2_gfx_read_viewport,
+   NULL, /* read_frame_raw */
 #ifdef HAVE_OVERLAY
     NULL,
 #endif

gfx/drivers/sdl_gfx.c

@@ -570,6 +570,7 @@ video_driver_t video_sdl = {
    sdl_gfx_set_rotation,
    sdl_gfx_viewport_info,
    sdl_gfx_read_viewport,
+   NULL, /* read_frame_raw */
 #ifdef HAVE_OVERLAY
    NULL,
 #endif

gfx/drivers/sunxi_gfx.c

@@ -1496,6 +1496,7 @@ video_driver_t video_sunxi = {
   sunxi_gfx_set_rotation,
   sunxi_gfx_viewport_info,
   NULL, /* read_viewport */
+  NULL, /* read_frame_raw */
 
 #ifdef HAVE_OVERLAY
   NULL, /* overlay_interface */

gfx/drivers/vg.c

@@ -491,6 +491,7 @@ video_driver_t video_vg = {
    vg_set_rotation,
    vg_viewport_info,
    vg_read_viewport,
+   NULL, /* read_frame_raw */
 #ifdef HAVE_OVERLAY
   NULL, /* overlay_interface */
 #endif

gfx/drivers/xenon360_gfx.c

@@ -329,6 +329,7 @@ video_driver_t video_xenon360 = {
    xenon360_gfx_set_rotation,
    xenon360_gfx_viewport_info,
    xenon360_gfx_read_viewport,
+   NULL, /* read_frame_raw */
 
 #ifdef HAVE_OVERLAY
    NULL, /* overlay_interface */

gfx/drivers/xvideo.c

@@ -937,6 +937,7 @@ video_driver_t video_xvideo = {
    xv_set_rotation,
    xv_viewport_info,
    xv_read_viewport,
+   NULL, /* read_frame_raw */
 #ifdef HAVE_OVERLAY
   NULL, /* overlay_interface */
 #endif

gfx/video_driver.h

@@ -167,6 +167,13 @@ typedef struct video_driver
    /* Reads out in BGR byte order (24bpp). */
    bool (*read_viewport)(void *data, uint8_t *buffer);
 
+   /* Returns a pointer to a newly allocated buffer that can
+    * (and must) be passed to free() by the caller, containing a
+    * copy of the current raw frame in the active pixel format
+    * and sets width, height and pitch to the correct values. */
+   void* (*read_frame_raw)(void *data, unsigned *width,
+   unsigned *height, size_t *pitch);
+
 #ifdef HAVE_OVERLAY
    void (*overlay_interface)(void *data, const video_overlay_interface_t **iface);
 #endif

gfx/video_thread_wrapper.c

@@ -977,6 +977,7 @@ static const video_driver_t video_thread = {
    thread_set_rotation,
    thread_viewport_info,
    thread_read_viewport,
+   NULL, /* read_frame_raw */
 #ifdef HAVE_OVERLAY
    thread_get_overlay_interface, /* get_overlay_interface */
 #endif