Add "scaled" and "pixelperfect" layer sizes.

[sdl_omap.git] / src / video / omapdss / osdl_video.c

diff --git a/src/video/omapdss/osdl_video.c b/src/video/omapdss/osdl_video.c
index b6abb93..f64f4e1 100644 (file)
--- a/src/video/omapdss/osdl_video.c
+++ b/src/video/omapdss/osdl_video.c
@@ -22,6 +22,8 @@
 #include "linux/fbdev.h"
 #include "linux/xenv.h"
 
+#define MIN(a, b) ( ((a) < (b)) ? (a) : (b) )
+
 struct omapfb_state {
        struct omapfb_plane_info pi;
        struct omapfb_mem_info mi;
@@ -300,13 +302,28 @@ static int osdl_setup_omap_layer(struct SDL_PrivateVideoData *pdata,
 
        tmp = getenv("SDL_OMAP_LAYER_SIZE");
        if (tmp != NULL) {
-               if (strcasecmp(tmp, "fullscreen") == 0)
+               if (strcasecmp(tmp, "fullscreen") == 0) {
                        w = screen_w, h = screen_h;
-               else if (sscanf(tmp, "%dx%d", &tmp_w, &tmp_h) == 2)
+               }
+               else if (strcasecmp(tmp, "scaled") == 0) {
+                       float factor = MIN(((float)screen_w) / width, ((float)screen_h) / height);
+                       w = (int)(factor*width), h = (int)(factor*height);
+               }
+               else if (strcasecmp(tmp, "pixelperfect") == 0) {
+                       float factor = MIN(((float)screen_w) / width, ((float)screen_h) / height);
+                       w = ((int)factor) * width, h = ((int)factor) * height;
+                       /* factor < 1.f => 0x0 layer, so fall back to 'scaled' */
+                       if (!w || !h) {
+                               w = (int)(factor * width), h = (int)(factor * height);
+                       }
+               }
+               else if (sscanf(tmp, "%dx%d", &tmp_w, &tmp_h) == 2) {
                        w = tmp_w, h = tmp_h;
-               else
+               }
+               else {
                        err("layer size specified incorrectly, "
                                "should be like 800x480");
+               }
        }
 
        /* the layer can't be set larger than screen */