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504 lines
18 KiB
C
504 lines
18 KiB
C
/*
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Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely.
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*/
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/* Simple program: Move N sprites around on the screen as fast as possible */
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#include <SDL3/SDL.h>
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#include <SDL3/SDL_test_memory.h>
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#include <SDL3/SDL_main.h>
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#ifdef SDL_PLATFORM_EMSCRIPTEN
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#include <emscripten/emscripten.h>
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#endif
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#define WINDOW_WIDTH 640
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#define WINDOW_HEIGHT 480
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static const SDL_Color Palette[256] = {
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{ 255, 0, 0, SDL_ALPHA_OPAQUE },
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{ 255, 5, 0, SDL_ALPHA_OPAQUE },
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{ 255, 11, 0, SDL_ALPHA_OPAQUE },
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{ 255, 17, 0, SDL_ALPHA_OPAQUE },
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{ 255, 23, 0, SDL_ALPHA_OPAQUE },
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{ 255, 29, 0, SDL_ALPHA_OPAQUE },
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{ 255, 35, 0, SDL_ALPHA_OPAQUE },
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{ 255, 41, 0, SDL_ALPHA_OPAQUE },
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{ 255, 47, 0, SDL_ALPHA_OPAQUE },
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{ 255, 53, 0, SDL_ALPHA_OPAQUE },
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{ 255, 59, 0, SDL_ALPHA_OPAQUE },
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{ 255, 65, 0, SDL_ALPHA_OPAQUE },
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{ 255, 71, 0, SDL_ALPHA_OPAQUE },
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{ 255, 77, 0, SDL_ALPHA_OPAQUE },
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{ 255, 83, 0, SDL_ALPHA_OPAQUE },
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{ 255, 89, 0, SDL_ALPHA_OPAQUE },
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{ 255, 95, 0, SDL_ALPHA_OPAQUE },
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{ 255, 101, 0, SDL_ALPHA_OPAQUE },
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{ 255, 107, 0, SDL_ALPHA_OPAQUE },
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{ 255, 113, 0, SDL_ALPHA_OPAQUE },
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{ 255, 119, 0, SDL_ALPHA_OPAQUE },
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{ 255, 125, 0, SDL_ALPHA_OPAQUE },
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{ 255, 131, 0, SDL_ALPHA_OPAQUE },
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{ 255, 137, 0, SDL_ALPHA_OPAQUE },
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{ 255, 143, 0, SDL_ALPHA_OPAQUE },
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{ 255, 149, 0, SDL_ALPHA_OPAQUE },
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{ 255, 155, 0, SDL_ALPHA_OPAQUE },
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{ 255, 161, 0, SDL_ALPHA_OPAQUE },
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{ 255, 167, 0, SDL_ALPHA_OPAQUE },
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{ 255, 173, 0, SDL_ALPHA_OPAQUE },
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{ 255, 179, 0, SDL_ALPHA_OPAQUE },
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{ 255, 185, 0, SDL_ALPHA_OPAQUE },
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{ 255, 191, 0, SDL_ALPHA_OPAQUE },
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{ 255, 197, 0, SDL_ALPHA_OPAQUE },
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{ 255, 203, 0, SDL_ALPHA_OPAQUE },
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{ 255, 209, 0, SDL_ALPHA_OPAQUE },
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{ 255, 215, 0, SDL_ALPHA_OPAQUE },
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{ 255, 221, 0, SDL_ALPHA_OPAQUE },
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{ 255, 227, 0, SDL_ALPHA_OPAQUE },
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{ 255, 233, 0, SDL_ALPHA_OPAQUE },
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{ 255, 239, 0, SDL_ALPHA_OPAQUE },
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{ 255, 245, 0, SDL_ALPHA_OPAQUE },
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{ 255, 251, 0, SDL_ALPHA_OPAQUE },
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{ 253, 255, 0, SDL_ALPHA_OPAQUE },
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{ 247, 255, 0, SDL_ALPHA_OPAQUE },
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{ 241, 255, 0, SDL_ALPHA_OPAQUE },
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{ 235, 255, 0, SDL_ALPHA_OPAQUE },
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{ 229, 255, 0, SDL_ALPHA_OPAQUE },
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{ 223, 255, 0, SDL_ALPHA_OPAQUE },
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{ 217, 255, 0, SDL_ALPHA_OPAQUE },
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{ 211, 255, 0, SDL_ALPHA_OPAQUE },
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{ 205, 255, 0, SDL_ALPHA_OPAQUE },
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{ 199, 255, 0, SDL_ALPHA_OPAQUE },
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{ 193, 255, 0, SDL_ALPHA_OPAQUE },
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{ 187, 255, 0, SDL_ALPHA_OPAQUE },
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{ 181, 255, 0, SDL_ALPHA_OPAQUE },
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{ 175, 255, 0, SDL_ALPHA_OPAQUE },
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{ 169, 255, 0, SDL_ALPHA_OPAQUE },
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{ 163, 255, 0, SDL_ALPHA_OPAQUE },
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{ 157, 255, 0, SDL_ALPHA_OPAQUE },
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{ 151, 255, 0, SDL_ALPHA_OPAQUE },
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{ 145, 255, 0, SDL_ALPHA_OPAQUE },
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{ 139, 255, 0, SDL_ALPHA_OPAQUE },
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{ 133, 255, 0, SDL_ALPHA_OPAQUE },
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{ 127, 255, 0, SDL_ALPHA_OPAQUE },
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{ 121, 255, 0, SDL_ALPHA_OPAQUE },
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{ 115, 255, 0, SDL_ALPHA_OPAQUE },
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{ 109, 255, 0, SDL_ALPHA_OPAQUE },
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{ 103, 255, 0, SDL_ALPHA_OPAQUE },
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{ 97, 255, 0, SDL_ALPHA_OPAQUE },
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{ 91, 255, 0, SDL_ALPHA_OPAQUE },
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{ 85, 255, 0, SDL_ALPHA_OPAQUE },
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{ 79, 255, 0, SDL_ALPHA_OPAQUE },
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{ 73, 255, 0, SDL_ALPHA_OPAQUE },
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{ 67, 255, 0, SDL_ALPHA_OPAQUE },
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{ 61, 255, 0, SDL_ALPHA_OPAQUE },
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{ 55, 255, 0, SDL_ALPHA_OPAQUE },
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{ 49, 255, 0, SDL_ALPHA_OPAQUE },
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{ 43, 255, 0, SDL_ALPHA_OPAQUE },
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{ 37, 255, 0, SDL_ALPHA_OPAQUE },
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{ 31, 255, 0, SDL_ALPHA_OPAQUE },
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{ 25, 255, 0, SDL_ALPHA_OPAQUE },
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{ 19, 255, 0, SDL_ALPHA_OPAQUE },
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{ 13, 255, 0, SDL_ALPHA_OPAQUE },
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{ 7, 255, 0, SDL_ALPHA_OPAQUE },
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{ 1, 255, 0, SDL_ALPHA_OPAQUE },
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{ 0, 255, 3, SDL_ALPHA_OPAQUE },
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{ 0, 255, 9, SDL_ALPHA_OPAQUE },
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{ 0, 255, 15, SDL_ALPHA_OPAQUE },
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{ 0, 255, 21, SDL_ALPHA_OPAQUE },
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{ 0, 255, 27, SDL_ALPHA_OPAQUE },
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{ 0, 255, 33, SDL_ALPHA_OPAQUE },
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{ 0, 255, 39, SDL_ALPHA_OPAQUE },
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{ 0, 255, 45, SDL_ALPHA_OPAQUE },
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{ 0, 255, 51, SDL_ALPHA_OPAQUE },
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{ 0, 255, 57, SDL_ALPHA_OPAQUE },
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{ 0, 255, 63, SDL_ALPHA_OPAQUE },
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{ 0, 255, 69, SDL_ALPHA_OPAQUE },
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{ 0, 255, 75, SDL_ALPHA_OPAQUE },
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{ 0, 255, 81, SDL_ALPHA_OPAQUE },
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{ 0, 255, 87, SDL_ALPHA_OPAQUE },
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{ 0, 255, 93, SDL_ALPHA_OPAQUE },
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{ 0, 255, 99, SDL_ALPHA_OPAQUE },
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{ 0, 255, 105, SDL_ALPHA_OPAQUE },
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{ 0, 255, 111, SDL_ALPHA_OPAQUE },
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{ 0, 255, 117, SDL_ALPHA_OPAQUE },
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{ 0, 255, 123, SDL_ALPHA_OPAQUE },
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{ 0, 255, 129, SDL_ALPHA_OPAQUE },
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{ 0, 255, 135, SDL_ALPHA_OPAQUE },
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{ 0, 255, 141, SDL_ALPHA_OPAQUE },
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{ 0, 255, 147, SDL_ALPHA_OPAQUE },
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{ 0, 255, 153, SDL_ALPHA_OPAQUE },
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{ 0, 255, 159, SDL_ALPHA_OPAQUE },
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{ 0, 255, 165, SDL_ALPHA_OPAQUE },
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{ 0, 255, 171, SDL_ALPHA_OPAQUE },
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{ 0, 255, 177, SDL_ALPHA_OPAQUE },
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{ 0, 255, 183, SDL_ALPHA_OPAQUE },
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{ 0, 255, 189, SDL_ALPHA_OPAQUE },
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{ 0, 255, 195, SDL_ALPHA_OPAQUE },
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{ 0, 255, 201, SDL_ALPHA_OPAQUE },
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{ 0, 255, 207, SDL_ALPHA_OPAQUE },
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{ 0, 255, 213, SDL_ALPHA_OPAQUE },
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{ 0, 255, 219, SDL_ALPHA_OPAQUE },
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{ 0, 255, 225, SDL_ALPHA_OPAQUE },
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{ 0, 255, 231, SDL_ALPHA_OPAQUE },
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{ 0, 255, 237, SDL_ALPHA_OPAQUE },
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{ 0, 255, 243, SDL_ALPHA_OPAQUE },
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{ 0, 255, 249, SDL_ALPHA_OPAQUE },
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{ 0, 255, 255, SDL_ALPHA_OPAQUE },
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{ 0, 249, 255, SDL_ALPHA_OPAQUE },
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{ 0, 243, 255, SDL_ALPHA_OPAQUE },
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{ 0, 237, 255, SDL_ALPHA_OPAQUE },
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{ 0, 231, 255, SDL_ALPHA_OPAQUE },
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{ 0, 225, 255, SDL_ALPHA_OPAQUE },
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{ 0, 219, 255, SDL_ALPHA_OPAQUE },
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{ 0, 213, 255, SDL_ALPHA_OPAQUE },
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{ 0, 207, 255, SDL_ALPHA_OPAQUE },
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{ 0, 201, 255, SDL_ALPHA_OPAQUE },
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{ 0, 195, 255, SDL_ALPHA_OPAQUE },
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{ 0, 189, 255, SDL_ALPHA_OPAQUE },
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{ 0, 183, 255, SDL_ALPHA_OPAQUE },
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{ 0, 177, 255, SDL_ALPHA_OPAQUE },
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{ 0, 171, 255, SDL_ALPHA_OPAQUE },
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{ 0, 165, 255, SDL_ALPHA_OPAQUE },
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{ 0, 159, 255, SDL_ALPHA_OPAQUE },
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{ 0, 153, 255, SDL_ALPHA_OPAQUE },
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{ 0, 147, 255, SDL_ALPHA_OPAQUE },
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{ 0, 141, 255, SDL_ALPHA_OPAQUE },
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{ 0, 135, 255, SDL_ALPHA_OPAQUE },
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{ 0, 129, 255, SDL_ALPHA_OPAQUE },
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{ 0, 123, 255, SDL_ALPHA_OPAQUE },
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{ 0, 117, 255, SDL_ALPHA_OPAQUE },
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{ 0, 111, 255, SDL_ALPHA_OPAQUE },
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{ 0, 105, 255, SDL_ALPHA_OPAQUE },
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{ 0, 99, 255, SDL_ALPHA_OPAQUE },
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{ 0, 93, 255, SDL_ALPHA_OPAQUE },
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{ 0, 87, 255, SDL_ALPHA_OPAQUE },
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{ 0, 81, 255, SDL_ALPHA_OPAQUE },
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{ 0, 75, 255, SDL_ALPHA_OPAQUE },
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{ 0, 69, 255, SDL_ALPHA_OPAQUE },
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{ 0, 63, 255, SDL_ALPHA_OPAQUE },
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{ 0, 57, 255, SDL_ALPHA_OPAQUE },
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{ 0, 51, 255, SDL_ALPHA_OPAQUE },
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{ 0, 45, 255, SDL_ALPHA_OPAQUE },
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{ 0, 39, 255, SDL_ALPHA_OPAQUE },
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{ 0, 33, 255, SDL_ALPHA_OPAQUE },
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{ 0, 27, 255, SDL_ALPHA_OPAQUE },
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{ 0, 21, 255, SDL_ALPHA_OPAQUE },
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{ 0, 15, 255, SDL_ALPHA_OPAQUE },
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{ 0, 9, 255, SDL_ALPHA_OPAQUE },
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{ 0, 3, 255, SDL_ALPHA_OPAQUE },
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{ 1, 0, 255, SDL_ALPHA_OPAQUE },
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{ 7, 0, 255, SDL_ALPHA_OPAQUE },
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{ 13, 0, 255, SDL_ALPHA_OPAQUE },
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{ 19, 0, 255, SDL_ALPHA_OPAQUE },
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{ 25, 0, 255, SDL_ALPHA_OPAQUE },
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{ 31, 0, 255, SDL_ALPHA_OPAQUE },
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{ 37, 0, 255, SDL_ALPHA_OPAQUE },
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{ 43, 0, 255, SDL_ALPHA_OPAQUE },
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{ 49, 0, 255, SDL_ALPHA_OPAQUE },
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{ 55, 0, 255, SDL_ALPHA_OPAQUE },
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{ 61, 0, 255, SDL_ALPHA_OPAQUE },
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{ 67, 0, 255, SDL_ALPHA_OPAQUE },
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{ 73, 0, 255, SDL_ALPHA_OPAQUE },
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{ 79, 0, 255, SDL_ALPHA_OPAQUE },
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{ 85, 0, 255, SDL_ALPHA_OPAQUE },
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{ 91, 0, 255, SDL_ALPHA_OPAQUE },
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{ 97, 0, 255, SDL_ALPHA_OPAQUE },
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{ 103, 0, 255, SDL_ALPHA_OPAQUE },
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{ 109, 0, 255, SDL_ALPHA_OPAQUE },
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{ 115, 0, 255, SDL_ALPHA_OPAQUE },
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{ 121, 0, 255, SDL_ALPHA_OPAQUE },
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{ 127, 0, 255, SDL_ALPHA_OPAQUE },
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{ 133, 0, 255, SDL_ALPHA_OPAQUE },
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{ 139, 0, 255, SDL_ALPHA_OPAQUE },
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{ 145, 0, 255, SDL_ALPHA_OPAQUE },
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{ 151, 0, 255, SDL_ALPHA_OPAQUE },
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{ 157, 0, 255, SDL_ALPHA_OPAQUE },
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{ 163, 0, 255, SDL_ALPHA_OPAQUE },
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{ 169, 0, 255, SDL_ALPHA_OPAQUE },
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{ 175, 0, 255, SDL_ALPHA_OPAQUE },
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{ 181, 0, 255, SDL_ALPHA_OPAQUE },
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{ 187, 0, 255, SDL_ALPHA_OPAQUE },
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{ 193, 0, 255, SDL_ALPHA_OPAQUE },
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{ 199, 0, 255, SDL_ALPHA_OPAQUE },
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{ 205, 0, 255, SDL_ALPHA_OPAQUE },
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{ 211, 0, 255, SDL_ALPHA_OPAQUE },
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{ 217, 0, 255, SDL_ALPHA_OPAQUE },
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{ 223, 0, 255, SDL_ALPHA_OPAQUE },
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{ 229, 0, 255, SDL_ALPHA_OPAQUE },
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{ 235, 0, 255, SDL_ALPHA_OPAQUE },
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{ 241, 0, 255, SDL_ALPHA_OPAQUE },
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{ 247, 0, 255, SDL_ALPHA_OPAQUE },
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{ 253, 0, 255, SDL_ALPHA_OPAQUE },
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{ 255, 0, 251, SDL_ALPHA_OPAQUE },
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{ 255, 0, 245, SDL_ALPHA_OPAQUE },
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{ 255, 0, 239, SDL_ALPHA_OPAQUE },
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{ 255, 0, 233, SDL_ALPHA_OPAQUE },
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{ 255, 0, 227, SDL_ALPHA_OPAQUE },
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{ 255, 0, 221, SDL_ALPHA_OPAQUE },
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{ 255, 0, 215, SDL_ALPHA_OPAQUE },
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{ 255, 0, 209, SDL_ALPHA_OPAQUE },
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{ 255, 0, 203, SDL_ALPHA_OPAQUE },
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{ 255, 0, 197, SDL_ALPHA_OPAQUE },
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{ 255, 0, 191, SDL_ALPHA_OPAQUE },
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{ 255, 0, 185, SDL_ALPHA_OPAQUE },
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{ 255, 0, 179, SDL_ALPHA_OPAQUE },
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{ 255, 0, 173, SDL_ALPHA_OPAQUE },
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{ 255, 0, 167, SDL_ALPHA_OPAQUE },
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{ 255, 0, 161, SDL_ALPHA_OPAQUE },
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{ 255, 0, 155, SDL_ALPHA_OPAQUE },
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{ 255, 0, 149, SDL_ALPHA_OPAQUE },
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{ 255, 0, 143, SDL_ALPHA_OPAQUE },
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{ 255, 0, 137, SDL_ALPHA_OPAQUE },
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{ 255, 0, 131, SDL_ALPHA_OPAQUE },
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{ 255, 0, 125, SDL_ALPHA_OPAQUE },
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{ 255, 0, 119, SDL_ALPHA_OPAQUE },
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{ 255, 0, 113, SDL_ALPHA_OPAQUE },
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{ 255, 0, 107, SDL_ALPHA_OPAQUE },
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{ 255, 0, 101, SDL_ALPHA_OPAQUE },
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{ 255, 0, 95, SDL_ALPHA_OPAQUE },
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{ 255, 0, 89, SDL_ALPHA_OPAQUE },
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{ 255, 0, 83, SDL_ALPHA_OPAQUE },
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{ 255, 0, 77, SDL_ALPHA_OPAQUE },
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{ 255, 0, 71, SDL_ALPHA_OPAQUE },
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{ 255, 0, 65, SDL_ALPHA_OPAQUE },
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{ 255, 0, 59, SDL_ALPHA_OPAQUE },
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{ 255, 0, 53, SDL_ALPHA_OPAQUE },
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{ 255, 0, 47, SDL_ALPHA_OPAQUE },
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{ 255, 0, 41, SDL_ALPHA_OPAQUE },
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{ 255, 0, 35, SDL_ALPHA_OPAQUE },
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{ 255, 0, 29, SDL_ALPHA_OPAQUE },
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{ 255, 0, 23, SDL_ALPHA_OPAQUE },
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{ 255, 0, 17, SDL_ALPHA_OPAQUE },
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{ 255, 0, 11, SDL_ALPHA_OPAQUE },
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{ 255, 0, 5, SDL_ALPHA_OPAQUE }
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};
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static SDL_Renderer *renderer;
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static SDL_Palette *palette;
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static SDL_Texture *texture;
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static SDL_Texture *black_texture1;
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static SDL_Texture *black_texture2;
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static SDL_Texture *white_texture1;
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static SDL_Texture *white_texture2;
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static int palettePos = 0;
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static int paletteDir = -1;
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static bool done;
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static SDL_Texture *CreateTexture(const void *pixels, int pitch)
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{
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SDL_Texture *tex = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_INDEX8, SDL_TEXTUREACCESS_STATIC, 256, 1);
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if (!tex) {
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return NULL;
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}
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SDL_UpdateTexture(tex, NULL, pixels, pitch);
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SDL_SetTexturePalette(tex, palette);
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return tex;
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}
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static bool CreateTextures()
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{
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Uint8 data[256];
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int i;
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palette = SDL_CreatePalette(256);
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if (!palette) {
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return false;
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}
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for (i = 0; i < SDL_arraysize(data); i++) {
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data[i] = i;
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}
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texture = CreateTexture(data, SDL_arraysize(data));
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if (!texture) {
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return false;
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}
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black_texture1 = CreateTexture(data, SDL_arraysize(data));
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if (!black_texture1) {
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return false;
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}
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SDL_SetTextureScaleMode(black_texture1, SDL_SCALEMODE_NEAREST);
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black_texture2 = CreateTexture(data, SDL_arraysize(data));
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if (!black_texture2) {
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return false;
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}
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SDL_SetTextureScaleMode(black_texture2, SDL_SCALEMODE_NEAREST);
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white_texture1 = CreateTexture(data, SDL_arraysize(data));
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if (!white_texture1) {
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return false;
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}
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SDL_SetTextureScaleMode(white_texture1, SDL_SCALEMODE_NEAREST);
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white_texture2 = CreateTexture(data, SDL_arraysize(data));
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if (!white_texture2) {
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return false;
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}
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SDL_SetTextureScaleMode(white_texture2, SDL_SCALEMODE_NEAREST);
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return true;
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}
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static void UpdatePalette(int pos)
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{
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int paletteSize = (int)SDL_arraysize(Palette);
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if (pos == 0) {
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SDL_SetPaletteColors(palette, Palette, 0, paletteSize);
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} else {
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SDL_SetPaletteColors(palette, Palette + pos, 0, paletteSize - pos);
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SDL_SetPaletteColors(palette, Palette, paletteSize - pos, pos);
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}
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}
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static void loop(void)
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{
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SDL_Event event;
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SDL_FRect src = { 1.0f, 0.0f, 1.0f, 1.0f };
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SDL_FRect dst1 = { 0.0f, 0.0f, 32.0f, 32.0f };
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SDL_FRect dst2 = { 0.0f, WINDOW_HEIGHT - 32.0f, 32.0f, 32.0f };
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SDL_FRect dst3 = { WINDOW_WIDTH - 32.0f, 0.0f, 32.0f, 32.0f };
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SDL_FRect dst4 = { WINDOW_WIDTH - 32.0f, WINDOW_HEIGHT - 32.0f, 32.0f, 32.0f };
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SDL_FRect dst5 = { 0.0f, 32.0f + 2.0f, 32.0f, 32.0f };
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SDL_FRect dst6 = { WINDOW_WIDTH - 32.0f, 32.0f + 2.0f, 32.0f, 32.0f };
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const SDL_Color black = { 0, 0, 0, SDL_ALPHA_OPAQUE };
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const SDL_Color white = { 255, 255, 255, SDL_ALPHA_OPAQUE };
|
|
const SDL_Color red = { 255, 0, 0, SDL_ALPHA_OPAQUE };
|
|
const SDL_Color blue = { 0, 0, 255, SDL_ALPHA_OPAQUE };
|
|
|
|
/* Check for events */
|
|
while (SDL_PollEvent(&event)) {
|
|
switch (event.type) {
|
|
case SDL_EVENT_KEY_UP:
|
|
switch (event.key.key) {
|
|
case SDLK_LEFT:
|
|
paletteDir = 1;
|
|
break;
|
|
case SDLK_RIGHT:
|
|
paletteDir = -1;
|
|
break;
|
|
case SDLK_ESCAPE:
|
|
done = true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
break;
|
|
case SDL_EVENT_QUIT:
|
|
done = true;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
|
|
SDL_RenderClear(renderer);
|
|
|
|
/* Draw the rainbow texture */
|
|
UpdatePalette(palettePos);
|
|
palettePos += paletteDir;
|
|
if (palettePos < 0) {
|
|
palettePos = SDL_arraysize(Palette) - 1;
|
|
} else if (palettePos >= SDL_arraysize(Palette)) {
|
|
palettePos = 0;
|
|
}
|
|
SDL_RenderTexture(renderer, texture, NULL, NULL);
|
|
|
|
/* Draw one square with black, and one square with white
|
|
* This tests changing palette colors within a single frame
|
|
*/
|
|
SDL_SetPaletteColors(palette, &black, 1, 1);
|
|
SDL_SetRenderDrawColor(renderer, black.r, black.g, black.b, black.a);
|
|
SDL_RenderDebugText(renderer, dst1.x + 32.0f + 2.0f, dst1.y + 12, "Black");
|
|
SDL_RenderTexture(renderer, black_texture1, &src, &dst1);
|
|
SDL_RenderDebugText(renderer, dst2.x + 32.0f + 2.0f, dst2.y + 12, "Black");
|
|
SDL_RenderTexture(renderer, black_texture2, &src, &dst2);
|
|
SDL_SetPaletteColors(palette, &white, 1, 1);
|
|
SDL_SetRenderDrawColor(renderer, white.r, white.g, white.b, white.a);
|
|
SDL_RenderDebugText(renderer, dst3.x - 40.0f - 2.0f, dst3.y + 12, "White");
|
|
SDL_RenderTexture(renderer, white_texture1, &src, &dst3);
|
|
SDL_RenderDebugText(renderer, dst4.x - 40.0f - 2.0f, dst4.y + 12, "White");
|
|
SDL_RenderTexture(renderer, white_texture2, &src, &dst4);
|
|
|
|
/* Draw the same textures again with different colors */
|
|
SDL_SetPaletteColors(palette, &red, 1, 1);
|
|
SDL_SetRenderDrawColor(renderer, red.r, red.g, red.b, red.a);
|
|
SDL_RenderDebugText(renderer, dst5.x + 32.0f + 2.0f, dst5.y + 12, "Red");
|
|
SDL_RenderTexture(renderer, black_texture1, &src, &dst5);
|
|
SDL_SetPaletteColors(palette, &blue, 1, 1);
|
|
SDL_SetRenderDrawColor(renderer, blue.r, blue.g, blue.b, blue.a);
|
|
SDL_RenderDebugText(renderer, dst6.x - 40.0f - 2.0f, dst6.y + 12, "Blue");
|
|
SDL_RenderTexture(renderer, white_texture1, &src, &dst6);
|
|
|
|
SDL_RenderPresent(renderer);
|
|
SDL_Delay(10);
|
|
|
|
#ifdef SDL_PLATFORM_EMSCRIPTEN
|
|
if (done) {
|
|
emscripten_cancel_main_loop();
|
|
}
|
|
#endif
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
SDL_Window *window = NULL;
|
|
int i, return_code = -1;
|
|
|
|
SDLTest_TrackAllocations();
|
|
|
|
for (i = 1; i < argc; ++i) {
|
|
if (SDL_strcmp(argv[1], "--renderer") == 0 && argv[i + 1]) {
|
|
++i;
|
|
SDL_SetHint(SDL_HINT_RENDER_DRIVER, argv[i]);
|
|
} else {
|
|
SDL_Log("Usage: %s [--renderer driver]", argv[0]);
|
|
return_code = 1;
|
|
goto quit;
|
|
}
|
|
}
|
|
|
|
if (!SDL_CreateWindowAndRenderer("testpalette", WINDOW_WIDTH, WINDOW_HEIGHT, SDL_WINDOW_RESIZABLE, &window, &renderer)) {
|
|
SDL_Log("SDL_CreateWindowAndRenderer failed: %s", SDL_GetError());
|
|
return_code = 2;
|
|
goto quit;
|
|
}
|
|
|
|
if (!CreateTextures()) {
|
|
SDL_Log("Couldn't create textures: %s", SDL_GetError());
|
|
return_code = 3;
|
|
goto quit;
|
|
}
|
|
|
|
/* Main render loop */
|
|
done = false;
|
|
|
|
#ifdef SDL_PLATFORM_EMSCRIPTEN
|
|
emscripten_set_main_loop(loop, 0, 1);
|
|
#else
|
|
while (!done) {
|
|
loop();
|
|
}
|
|
#endif
|
|
return_code = 0;
|
|
quit:
|
|
SDL_DestroyPalette(palette);
|
|
SDL_DestroyRenderer(renderer);
|
|
SDL_DestroyWindow(window);
|
|
SDL_Quit();
|
|
SDLTest_LogAllocations();
|
|
return return_code;
|
|
}
|