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basic rpi scaler support

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This commit is contained in:
Emanuele Fornara 2021-04-15 13:58:08 +02:00
parent c862f5b3a8
commit 8ec1b99551
1 changed files with 18 additions and 5 deletions
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23
src/video/raspberry/SDL_rpivideo.c
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@ -262,6 +262,8 @@ RPI_CreateWindow(_THIS, SDL_Window * window)
DISPMANX_UPDATE_HANDLE_T dispman_update;
uint32_t layer = SDL_RPI_VIDEOLAYER;
const char *env;
float display_aspect;
float window_aspect;
/* Disable alpha, otherwise the app looks composed with whatever dispman is showing (X11, console,etc) */
dispman_alpha.flags = DISPMANX_FLAGS_ALPHA_FIXED_ALL_PIXELS;
@ -276,9 +278,15 @@ RPI_CreateWindow(_THIS, SDL_Window * window)
display = SDL_GetDisplayForWindow(window);
displaydata = (SDL_DisplayData *) display->driverdata;
/* Windows have one size for now */
window->w = display->desktop_mode.w;
window->h = display->desktop_mode.h;
/* Basic scaler support - TODO: mouse, env options, background layer */
if (!window->w) {
window->w = display->desktop_mode.w;
}
if (!window->h) {
window->h = display->desktop_mode.h;
}
display_aspect = (float)display->desktop_mode.w / display->desktop_mode.h;
window_aspect = (float)window->w / window->h;
/* OpenGL ES is the law here, buddy */
window->flags |= SDL_WINDOW_OPENGL;
@ -286,8 +294,13 @@ RPI_CreateWindow(_THIS, SDL_Window * window)
/* Create a dispman element and associate a window to it */
dst_rect.x = 0;
dst_rect.y = 0;
dst_rect.width = window->w;
dst_rect.height = window->h;
if (window_aspect >= display_aspect) {
dst_rect.width = display->desktop_mode.w;
dst_rect.height = display->desktop_mode.w / window_aspect;
} else {
dst_rect.width = display->desktop_mode.h * window_aspect;
dst_rect.height = display->desktop_mode.h;
}
src_rect.x = 0;
src_rect.y = 0;