46 lines
1.8 KiB
C
46 lines
1.8 KiB
C
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// x-run: make run
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#include <math.h>
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#include <raylib.h>
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int main(int argc, char **argv) {
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SetTraceLogLevel(LOG_ERROR);
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SetConfigFlags(FLAG_WINDOW_RESIZABLE);
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InitWindow(__WINDOW_WIDTH * 2, __WINDOW_HEIGHT * 2, "__PROJECT");
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const int _window_size[2] = { __WINDOW_WIDTH, __WINDOW_HEIGHT };
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Image canvas = GenImageColor(__WINDOW_WIDTH, __WINDOW_HEIGHT, BLANK);
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Texture2D t_canvas = LoadTextureFromImage(canvas);
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SetTextureFilter(t_canvas, TEXTURE_FILTER_BILINEAR);
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Shader shd_upscale = LoadShader(0, "upscale.frag");
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int shdloc_texsize = GetShaderLocation(shd_upscale, "texture0_size");
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int shdloc_scale = GetShaderLocation(shd_upscale, "px_per_tx");
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for (int frame = 0; !WindowShouldClose(); frame++) {
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BeginDrawing();
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int window_width = GetScreenWidth(), window_height = GetScreenHeight();
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float scale = fminf(window_width / (float)__WINDOW_WIDTH, window_height / (float)__WINDOW_HEIGHT);
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{ // BEGIN frame
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ImageClearBackground(&canvas, GetColor(0x1A1A1AFF));
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ImageDrawText(&canvas, TextFormat("scale: %7.2fx", scale), 20, 20, 20, WHITE);
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} // END frame
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{ // BEGIN update
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UpdateTexture(t_canvas, canvas.data);
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BeginShaderMode(shd_upscale);
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SetShaderValue(shd_upscale, shdloc_texsize, _window_size, SHADER_UNIFORM_IVEC2);
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SetShaderValue(shd_upscale, shdloc_scale, &scale, SHADER_UNIFORM_FLOAT);
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int texture_width = scale * __WINDOW_WIDTH, texture_height = scale * __WINDOW_HEIGHT;
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ClearBackground(BLACK);
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DrawTexturePro(t_canvas, (Rectangle) {
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0, 0, __WINDOW_WIDTH, __WINDOW_HEIGHT
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}, (Rectangle) {
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floorf((window_width - texture_width) / 2.0),
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floorf((window_height - texture_height) / 2.0),
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texture_width, texture_height
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}, (Vector2) { 0, 0 }, 0.0, WHITE);
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EndShaderMode();
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} // END update
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EndDrawing();
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}
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}
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