115 lines
3.0 KiB
C
115 lines
3.0 KiB
C
//---------------------------------------------------------------------------//
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// ==>/[_]\ fxlink: A community communication tool for CASIO calculators. //
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// |:::| Made by Lephe' as part of the fxSDK. //
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// \___/ License: MIT <https://opensource.org/licenses/MIT> //
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//---------------------------------------------------------------------------//
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#include <fxlink/tooling/sdl2.h>
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#include <fxlink/logging.h>
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#ifdef FXLINK_DISABLE_SDL2
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void fxlink_sdl2_display_raw(struct fxlink_message_image_raw const *raw)
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{
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log_("SDL2 disabled at compiled-time, skipping frame");
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}
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void fxlink_sdl2_handle_events(void)
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{
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}
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#else /* FXLINK_DISABLE_SDL2 */
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static SDL_Window *window = NULL;
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static int init(size_t width, size_t height)
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{
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if(!SDL_WasInit(SDL_INIT_VIDEO)) {
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int rc = SDL_Init(SDL_INIT_VIDEO);
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if(rc < 0)
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return elog("cannot initialize SDL: %s\n", SDL_GetError());
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}
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window = SDL_CreateWindow("fxlink", SDL_WINDOWPOS_CENTERED,
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SDL_WINDOWPOS_CENTERED, width, height, 0);
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return 0;
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}
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__attribute__((destructor))
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static void quit(void)
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{
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if(!window)
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return;
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SDL_DestroyWindow(window);
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window = NULL;
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}
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/* Generate an RGB888 surface from image data. */
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static SDL_Surface *surface_for_image(uint8_t **RGB888_rows, int width,
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int height, int scale)
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{
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/* Little endian setup for RGB */
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SDL_Surface *s = SDL_CreateRGBSurface(0, width*scale, height*scale, 24,
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0x000000ff, 0x0000ff00, 0x0000ff00, 0);
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if(!s) {
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elog("cannot create surface for image\n");
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return NULL;
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}
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for(int y = 0; y < height; y++) {
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for(int dy = 0; dy < scale; dy++) {
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uint8_t *src = RGB888_rows[y];
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uint8_t *dst = s->pixels + (y*scale+dy) * s->pitch;
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for(int x = 0; x < width; x++) {
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for(int dx = 0; dx < scale; dx++) {
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dst[0] = src[0];
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dst[1] = src[1];
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dst[2] = src[2];
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dst += 3;
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}
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src += 3;
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}
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}
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}
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return s;
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}
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void fxlink_sdl2_display_raw(struct fxlink_message_image_raw const *raw)
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{
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if(!window && init(raw->width, raw->height))
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return;
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int current_w, current_h;
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int scale = 1;
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SDL_GetWindowSize(window, ¤t_w, ¤t_h);
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if(current_w != raw->width * scale || current_h != raw->height * scale)
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SDL_SetWindowSize(window, raw->width * scale, raw->height * scale);
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SDL_Surface *src =
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surface_for_image(raw->data, raw->width, raw->height, scale);
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if(!src)
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return;
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SDL_Surface *dst = SDL_GetWindowSurface(window);
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SDL_BlitSurface(src, NULL, dst, NULL);
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SDL_FreeSurface(src);
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SDL_UpdateWindowSurface(window);
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}
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void fxlink_sdl2_handle_events(void)
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{
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if(!window)
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return;
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SDL_Event e;
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while(SDL_PollEvent(&e)) {
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if(e.type == SDL_QUIT)
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quit();
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}
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}
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#endif /* FXLINK_DISABLE_SDL2 */
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