mirror of https://github.com/st3fan/ewm.git
73 lines
2.4 KiB
C
73 lines
2.4 KiB
C
// The MIT License (MIT)
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//
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// Copyright (c) 2015 Stefan Arentz - http://github.com/st3fan/ewm
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#include <stdio.h>
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#include <SDL2/SDL.h>
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int ewm_sdl_pixel_format(SDL_Renderer *renderer) {
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SDL_RendererInfo info;
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if (SDL_GetRendererInfo(renderer, &info) != 0) {
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return -1;
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}
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for (Uint32 i = 0; i < info.num_texture_formats; i++) {
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int format = info.texture_formats[i];
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if (format == SDL_PIXELFORMAT_ARGB8888 || format == SDL_PIXELFORMAT_RGBA8888 || format == SDL_PIXELFORMAT_RGB888) {
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return format;
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}
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}
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return -1;
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}
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int ewm_sdl_check_renderer(SDL_Renderer *renderer) {
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SDL_RendererInfo info;
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if (SDL_GetRendererInfo(renderer, &info) != 0) {
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printf("ewm: sdl: cannot get renderer info: %s\n", SDL_GetError());
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return -1;
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}
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if ((info.flags & SDL_RENDERER_ACCELERATED) == 0) {
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printf("ewm: sdl: require accelerated renderer\n");
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return -1;
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}
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if (ewm_sdl_pixel_format(renderer) == -1) {
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printf("ewm: sdl: cannot find supported pixel format (ARGB888, RGBA8888, RGB888)\n");
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return -1;
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}
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return 0;
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}
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uint32_t ewm_sdl_green(SDL_Renderer *renderer) {
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switch (ewm_sdl_pixel_format(renderer)) {
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case SDL_PIXELFORMAT_RGBA8888:
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return 0x00ff00ff;
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case SDL_PIXELFORMAT_ARGB8888:
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return 0xff00ff00;
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case SDL_PIXELFORMAT_RGB888:
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return 0x00ff0000;
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}
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return 0xffffff;
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}
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