Prevent potential divide-by-zero errors in sdl_still consumer.

Signed-off-by: Dan Dennedy <dan@dennedy.org>

git-svn-id: https://mlt.svn.sourceforge.net/svnroot/mlt/trunk/mlt@1422 d19143bc-622f-0410-bfdd-b5b2a6649095

diff --git a/src/modules/sdl/consumer_sdl_still.c b/src/modules/sdl/consumer_sdl_still.c
index 202b434..3efd8f4 100644 (file)
--- a/src/modules/sdl/consumer_sdl_still.c
+++ b/src/modules/sdl/consumer_sdl_still.c
@@ -252,6 +252,7 @@ static void sdl_unlock_display( )
 static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 {
        // Generate the affine transform scaling values
+       if ( rect.w == 0 || rect.h == 0 ) return;
        int scale_width = ( width << 16 ) / rect.w;
        int scale_height = ( height << 16 ) / rect.h;
        int stride = width * 3;
@@ -281,6 +282,7 @@ static inline void display_1( SDL_Surface *screen, SDL_Rect rect, uint8_t *image
 static inline void display_2( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 {
        // Generate the affine transform scaling values
+       if ( rect.w == 0 || rect.h == 0 ) return;
        int scale_width = ( width << 16 ) / rect.w;
        int scale_height = ( height << 16 ) / rect.h;
        int stride = width * 3;
@@ -310,6 +312,7 @@ static inline void display_2( SDL_Surface *screen, SDL_Rect rect, uint8_t *image
 static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 {
        // Generate the affine transform scaling values
+       if ( rect.w == 0 || rect.h == 0 ) return;
        int scale_width = ( width << 16 ) / rect.w;
        int scale_height = ( height << 16 ) / rect.h;
        int stride = width * 3;
@@ -343,6 +346,7 @@ static inline void display_3( SDL_Surface *screen, SDL_Rect rect, uint8_t *image
 static inline void display_4( SDL_Surface *screen, SDL_Rect rect, uint8_t *image, int width, int height )
 {
        // Generate the affine transform scaling values
+       if ( rect.w == 0 || rect.h == 0 ) return;
        int scale_width = ( width << 16 ) / rect.w;
        int scale_height = ( height << 16 ) / rect.h;
        int stride = width * 3;