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-rw-r--r--uisimulator/sdl/lcd-sdl.c20
1 files changed, 8 insertions, 12 deletions
diff --git a/uisimulator/sdl/lcd-sdl.c b/uisimulator/sdl/lcd-sdl.c
index aa74c14cd9..f1ffe8a76a 100644
--- a/uisimulator/sdl/lcd-sdl.c
+++ b/uisimulator/sdl/lcd-sdl.c
@@ -75,20 +75,16 @@ void sdl_update_rect(SDL_Surface *surface, int x_start, int y_start, int width,
75void sdl_gui_update(SDL_Surface *surface, int x_start, int y_start, int width, 75void sdl_gui_update(SDL_Surface *surface, int x_start, int y_start, int width,
76 int height, int max_x, int max_y, int ui_x, int ui_y) 76 int height, int max_x, int max_y, int ui_x, int ui_y)
77{ 77{
78 int xmax, ymax; 78 if (x_start + width > max_x)
79 79 width = max_x - x_start;
80 ymax = y_start + height; 80 if (y_start + height > max_y)
81 xmax = x_start + width; 81 height = max_y - y_start;
82
83 if(xmax > max_x)
84 xmax = max_x;
85 if(ymax >= max_y)
86 ymax = max_y;
87 82
88 SDL_Rect src = {x_start * display_zoom, y_start * display_zoom, 83 SDL_Rect src = {x_start * display_zoom, y_start * display_zoom,
89 xmax * display_zoom, ymax * display_zoom}; 84 width * display_zoom, height * display_zoom};
90 SDL_Rect dest= {(ui_x + x_start) * display_zoom, (ui_y + y_start) * display_zoom, 85 SDL_Rect dest= {(ui_x + x_start) * display_zoom,
91 xmax * display_zoom, ymax * display_zoom}; 86 (ui_y + y_start) * display_zoom,
87 width * display_zoom, height * display_zoom};
92 88
93 if (surface->flags & SDL_SRCALPHA) /* alpha needs a black background */ 89 if (surface->flags & SDL_SRCALPHA) /* alpha needs a black background */
94 SDL_FillRect(gui_surface, &dest, 0); 90 SDL_FillRect(gui_surface, &dest, 0);