teststreaming.c (6357B)
1 /* 2 Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org> 3 4 This software is provided 'as-is', without any express or implied 5 warranty. In no event will the authors be held liable for any damages 6 arising from the use of this software. 7 8 Permission is granted to anyone to use this software for any purpose, 9 including commercial applications, and to alter it and redistribute it 10 freely. 11 */ 12 /******************************************************************************** 13 * * 14 * Running moose :) Coded by Mike Gorchak. * 15 * * 16 ********************************************************************************/ 17 18 #include <stdlib.h> 19 #include <stdio.h> 20 21 #ifdef __EMSCRIPTEN__ 22 #include <emscripten/emscripten.h> 23 #endif 24 25 #include "SDL.h" 26 27 #define MOOSEPIC_W 64 28 #define MOOSEPIC_H 88 29 30 #define MOOSEFRAME_SIZE (MOOSEPIC_W * MOOSEPIC_H) 31 #define MOOSEFRAMES_COUNT 10 32 33 SDL_Color MooseColors[84] = { 34 {49, 49, 49, 255}, {66, 24, 0, 255}, {66, 33, 0, 255}, {66, 66, 66, 255}, 35 {66, 115, 49, 255}, {74, 33, 0, 255}, {74, 41, 16, 255}, {82, 33, 8, 255}, 36 {82, 41, 8, 255}, {82, 49, 16, 255}, {82, 82, 82, 255}, {90, 41, 8, 255}, 37 {90, 41, 16, 255}, {90, 57, 24, 255}, {99, 49, 16, 255}, {99, 66, 24, 255}, 38 {99, 66, 33, 255}, {99, 74, 33, 255}, {107, 57, 24, 255}, {107, 82, 41, 255}, 39 {115, 57, 33, 255}, {115, 66, 33, 255}, {115, 66, 41, 255}, {115, 74, 0, 255}, 40 {115, 90, 49, 255}, {115, 115, 115, 255}, {123, 82, 0, 255}, {123, 99, 57, 255}, 41 {132, 66, 41, 255}, {132, 74, 41, 255}, {132, 90, 8, 255}, {132, 99, 33, 255}, 42 {132, 99, 66, 255}, {132, 107, 66, 255}, {140, 74, 49, 255}, {140, 99, 16, 255}, 43 {140, 107, 74, 255}, {140, 115, 74, 255}, {148, 107, 24, 255}, {148, 115, 82, 255}, 44 {148, 123, 74, 255}, {148, 123, 90, 255}, {156, 115, 33, 255}, {156, 115, 90, 255}, 45 {156, 123, 82, 255}, {156, 132, 82, 255}, {156, 132, 99, 255}, {156, 156, 156, 255}, 46 {165, 123, 49, 255}, {165, 123, 90, 255}, {165, 132, 82, 255}, {165, 132, 90, 255}, 47 {165, 132, 99, 255}, {165, 140, 90, 255}, {173, 132, 57, 255}, {173, 132, 99, 255}, 48 {173, 140, 107, 255}, {173, 140, 115, 255}, {173, 148, 99, 255}, {173, 173, 173, 255}, 49 {181, 140, 74, 255}, {181, 148, 115, 255}, {181, 148, 123, 255}, {181, 156, 107, 255}, 50 {189, 148, 123, 255}, {189, 156, 82, 255}, {189, 156, 123, 255}, {189, 156, 132, 255}, 51 {189, 189, 189, 255}, {198, 156, 123, 255}, {198, 165, 132, 255}, {206, 165, 99, 255}, 52 {206, 165, 132, 255}, {206, 173, 140, 255}, {206, 206, 206, 255}, {214, 173, 115, 255}, 53 {214, 173, 140, 255}, {222, 181, 148, 255}, {222, 189, 132, 255}, {222, 189, 156, 255}, 54 {222, 222, 222, 255}, {231, 198, 165, 255}, {231, 231, 231, 255}, {239, 206, 173, 255} 55 }; 56 57 Uint8 MooseFrames[MOOSEFRAMES_COUNT][MOOSEFRAME_SIZE]; 58 59 SDL_Renderer *renderer; 60 int frame; 61 SDL_Texture *MooseTexture; 62 SDL_bool done = SDL_FALSE; 63 64 void quit(int rc) 65 { 66 SDL_Quit(); 67 exit(rc); 68 } 69 70 void UpdateTexture(SDL_Texture *texture, int frame) 71 { 72 SDL_Color *color; 73 Uint8 *src; 74 Uint32 *dst; 75 int row, col; 76 void *pixels; 77 int pitch; 78 79 if (SDL_LockTexture(texture, NULL, &pixels, &pitch) < 0) { 80 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't lock texture: %s\n", SDL_GetError()); 81 quit(5); 82 } 83 src = MooseFrames[frame]; 84 for (row = 0; row < MOOSEPIC_H; ++row) { 85 dst = (Uint32*)((Uint8*)pixels + row * pitch); 86 for (col = 0; col < MOOSEPIC_W; ++col) { 87 color = &MooseColors[*src++]; 88 *dst++ = (0xFF000000|(color->r<<16)|(color->g<<8)|color->b); 89 } 90 } 91 SDL_UnlockTexture(texture); 92 } 93 94 void 95 loop() 96 { 97 SDL_Event event; 98 99 while (SDL_PollEvent(&event)) { 100 switch (event.type) { 101 case SDL_KEYDOWN: 102 if (event.key.keysym.sym == SDLK_ESCAPE) { 103 done = SDL_TRUE; 104 } 105 break; 106 case SDL_QUIT: 107 done = SDL_TRUE; 108 break; 109 } 110 } 111 112 frame = (frame + 1) % MOOSEFRAMES_COUNT; 113 UpdateTexture(MooseTexture, frame); 114 115 SDL_RenderClear(renderer); 116 SDL_RenderCopy(renderer, MooseTexture, NULL, NULL); 117 SDL_RenderPresent(renderer); 118 119 #ifdef __EMSCRIPTEN__ 120 if (done) { 121 emscripten_cancel_main_loop(); 122 } 123 #endif 124 } 125 126 int 127 main(int argc, char **argv) 128 { 129 SDL_Window *window; 130 SDL_RWops *handle; 131 132 /* Enable standard application logging */ 133 SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO); 134 135 if (SDL_Init(SDL_INIT_VIDEO) < 0) { 136 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError()); 137 return 1; 138 } 139 140 /* load the moose images */ 141 handle = SDL_RWFromFile("moose.dat", "rb"); 142 if (handle == NULL) { 143 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Can't find the file moose.dat !\n"); 144 quit(2); 145 } 146 SDL_RWread(handle, MooseFrames, MOOSEFRAME_SIZE, MOOSEFRAMES_COUNT); 147 SDL_RWclose(handle); 148 149 150 /* Create the window and renderer */ 151 window = SDL_CreateWindow("Happy Moose", 152 SDL_WINDOWPOS_UNDEFINED, 153 SDL_WINDOWPOS_UNDEFINED, 154 MOOSEPIC_W*4, MOOSEPIC_H*4, 155 SDL_WINDOW_RESIZABLE); 156 if (!window) { 157 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't set create window: %s\n", SDL_GetError()); 158 quit(3); 159 } 160 161 renderer = SDL_CreateRenderer(window, -1, 0); 162 if (!renderer) { 163 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't set create renderer: %s\n", SDL_GetError()); 164 quit(4); 165 } 166 167 MooseTexture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, MOOSEPIC_W, MOOSEPIC_H); 168 if (!MooseTexture) { 169 SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't set create texture: %s\n", SDL_GetError()); 170 quit(5); 171 } 172 173 /* Loop, waiting for QUIT or the escape key */ 174 frame = 0; 175 176 #ifdef __EMSCRIPTEN__ 177 emscripten_set_main_loop(loop, 0, 1); 178 #else 179 while (!done) { 180 loop(); 181 } 182 #endif 183 184 SDL_DestroyRenderer(renderer); 185 186 quit(0); 187 return 0; 188 } 189 190 /* vi: set ts=4 sw=4 expandtab: */