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commit 017a24fe557af8dfd0f3b98796ef439db5246a84 Author: Cyril Hrubis metan@ucw.cz Date: Sun Feb 19 20:45:11 2012 +0100

backends: SDL Fix Flip operation.

The SDL Flip takes x, y, w, h and not x, y, x, y.

diff --git a/include/backends/GP_Backend.h b/include/backends/GP_Backend.h index 4ddda59..25d6b7e 100644 --- a/include/backends/GP_Backend.h +++ b/include/backends/GP_Backend.h @@ -86,8 +86,8 @@ typedef struct GP_Backend { * If display is not buffered, this is no-op. */ void (*UpdateRect)(struct GP_Backend *self, - GP_Coord x1, GP_Coord y1, - GP_Coord x2, GP_Coord y2); + GP_Coord x0, GP_Coord y0, + GP_Coord x1, GP_Coord y1);

/* * Exits the backend. @@ -133,6 +133,7 @@ static inline void GP_BackendUpdateRect(GP_Backend *backend, { GP_TRANSFORM_POINT(backend->context, x0, y0); GP_TRANSFORM_POINT(backend->context, x1, y1); + backend->UpdateRect(backend, x0, y0, x1, y1); }

diff --git a/libs/backends/GP_SDL.c b/libs/backends/GP_SDL.c index b88b3b5..809d4b6 100644 --- a/libs/backends/GP_SDL.c +++ b/libs/backends/GP_SDL.c @@ -52,11 +52,17 @@ static void sdl_flip(struct GP_Backend *self __attribute__((unused))) }

static void sdl_update_rect(struct GP_Backend *self __attribute__((unused)), - GP_Coord x1, GP_Coord y1, GP_Coord x2, GP_Coord y2) + GP_Coord x0, GP_Coord y0, GP_Coord x1, GP_Coord y1) { SDL_mutexP(mutex); - - SDL_UpdateRect(sdl_surface, x1, y1, x2, y2); + + /* + * SDL_UpdateRect() with all x0, y0, x1 and y1 zero updates whole + * screen we avoid such behavior as it will break other backends. + */ + if (x1 != 0 && y1 != 0) + SDL_UpdateRect(sdl_surface, x0, y0, + GP_ABS(x1 - x0) + 1, GP_ABS(y1 - y0) + 1); SDL_mutexV(mutex); }

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Summary of changes: libs/backends/GP_SDL.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-)

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