Atlas - testviewport.c
Home / ext / SDL2 / test Lines: 3 | Size: 6085 bytes [Download] [Show on GitHub] [Search similar files] [Raw] [Raw (proxy)][FILE BEGIN]1/* 2 Copyright (C) 1997-2018 Sam Lantinga <[email protected]> 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/* Simple program: Check viewports */ 13 14#include <stdlib.h> 15#include <stdio.h> 16#include <time.h> 17 18#ifdef __EMSCRIPTEN__ 19#include <emscripten/emscripten.h> 20#endif 21 22#include "SDL_test.h" 23#include "SDL_test_common.h" 24 25 26static SDLTest_CommonState *state; 27 28SDL_Rect viewport; 29int done, j; 30SDL_bool use_target = SDL_FALSE; 31#ifdef __EMSCRIPTEN__ 32Uint32 wait_start; 33#endif 34 35/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */ 36static void 37quit(int rc) 38{ 39 SDLTest_CommonQuit(state); 40 exit(rc); 41} 42 43void 44DrawOnViewport(SDL_Renderer * renderer, SDL_Rect viewport) 45{ 46 SDL_Rect rect; 47 48 /* Set the viewport */ 49 SDL_RenderSetViewport(renderer, &viewport); 50 51 /* Draw a gray background */ 52 SDL_SetRenderDrawColor(renderer, 0x80, 0x80, 0x80, 0xFF); 53 SDL_RenderClear(renderer); 54 55 /* Test inside points */ 56 SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xF, 0xFF); 57 SDL_RenderDrawPoint(renderer, viewport.h/2 + 10, viewport.w/2); 58 SDL_RenderDrawPoint(renderer, viewport.h/2 - 10, viewport.w/2); 59 SDL_RenderDrawPoint(renderer, viewport.h/2 , viewport.w/2 - 10); 60 SDL_RenderDrawPoint(renderer, viewport.h/2 , viewport.w/2 + 10); 61 62 /* Test horizontal and vertical lines */ 63 SDL_SetRenderDrawColor(renderer, 0x00, 0xFF, 0x00, 0xFF); 64 SDL_RenderDrawLine(renderer, 1, 0, viewport.w-2, 0); 65 SDL_RenderDrawLine(renderer, 1, viewport.h-1, viewport.w-2, viewport.h-1); 66 SDL_RenderDrawLine(renderer, 0, 1, 0, viewport.h-2); 67 SDL_RenderDrawLine(renderer, viewport.w-1, 1, viewport.w-1, viewport.h-2); 68 69 /* Test diagonal lines */ 70 SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0xFF, 0xFF); 71 SDL_RenderDrawLine(renderer, 0, 0, 72 viewport.w-1, viewport.h-1); 73 SDL_RenderDrawLine(renderer, viewport.w-1, 0, 74 0, viewport.h-1); 75 76 /* Test outside points */ 77 SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0xF, 0xFF); 78 SDL_RenderDrawPoint(renderer, viewport.h/2 + viewport.h, viewport.w/2); 79 SDL_RenderDrawPoint(renderer, viewport.h/2 - viewport.h, viewport.w/2); 80 SDL_RenderDrawPoint(renderer, viewport.h/2 , viewport.w/2 - viewport.w); 81 SDL_RenderDrawPoint(renderer, viewport.h/2 , viewport.w/2 + viewport.w); 82 83 /* Add a box at the top */ 84 rect.w = 8; 85 rect.h = 8; 86 rect.x = (viewport.w - rect.w) / 2; 87 rect.y = 0; 88 SDL_RenderFillRect(renderer, &rect); 89} 90 91void 92loop() 93{ 94#ifdef __EMSCRIPTEN__ 95 /* Avoid using delays */ 96 if(SDL_GetTicks() - wait_start < 1000) 97 return; 98 wait_start = SDL_GetTicks(); 99#endif 100 SDL_Event event; 101 int i; 102 /* Check for events */ 103 while (SDL_PollEvent(&event)) { 104 SDLTest_CommonEvent(state, &event, &done); 105 } 106 107 /* Move a viewport box in steps around the screen */ 108 viewport.x = j * 100; 109 viewport.y = viewport.x; 110 viewport.w = 100 + j * 50; 111 viewport.h = 100 + j * 50; 112 j = (j + 1) % 4; 113 SDL_Log("Current Viewport x=%i y=%i w=%i h=%i", viewport.x, viewport.y, viewport.w, viewport.h); 114 115 for (i = 0; i < state->num_windows; ++i) { 116 if (state->windows[i] == NULL) 117 continue; 118 119 /* Draw using viewport */ 120 DrawOnViewport(state->renderers[i], viewport); 121 122 /* Update the screen! */ 123 if (use_target) { 124 SDL_SetRenderTarget(state->renderers[i], NULL); 125 SDL_RenderCopy(state->renderers[i], state->targets[i], NULL, NULL); 126 SDL_RenderPresent(state->renderers[i]); 127 SDL_SetRenderTarget(state->renderers[i], state->targets[i]); 128 } else { 129 SDL_RenderPresent(state->renderers[i]); 130 } 131 } 132 133#ifdef __EMSCRIPTEN__ 134 if (done) { 135 emscripten_cancel_main_loop(); 136 } 137#endif 138} 139 140int 141main(int argc, char *argv[]) 142{ 143 int i; 144 Uint32 then, now, frames; 145 146 /* Initialize test framework */ 147 state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO); 148 if (!state) { 149 return 1; 150 } 151 152 for (i = 1; i < argc;) { 153 int consumed; 154 155 consumed = SDLTest_CommonArg(state, i); 156 if (consumed == 0) { 157 consumed = -1; 158 if (SDL_strcasecmp(argv[i], "--target") == 0) { 159 use_target = SDL_TRUE; 160 consumed = 1; 161 } 162 } 163 if (consumed < 0) { 164 SDL_Log("Usage: %s %s [--target]\n", 165 argv[0], SDLTest_CommonUsage(state)); 166 quit(1); 167 } 168 i += consumed; 169 } 170 if (!SDLTest_CommonInit(state)) { 171 quit(2); 172 } 173 174 if (use_target) { 175 int w, h; 176 177 for (i = 0; i < state->num_windows; ++i) { 178 SDL_GetWindowSize(state->windows[i], &w, &h); 179 state->targets[i] = SDL_CreateTexture(state->renderers[i], SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, w, h); 180 SDL_SetRenderTarget(state->renderers[i], state->targets[i]); 181 } 182 } 183 184 for (i = 0; i < state->num_windows; ++i) { 185 SDL_Renderer *renderer = state->renderers[i]; 186 SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF); 187 SDL_RenderClear(renderer); 188 } 189 190 /* Main render loop */ 191 frames = 0; 192 then = SDL_GetTicks(); 193 done = 0; 194 j = 0; 195 196#ifdef __EMSCRIPTEN__ 197 wait_start = SDL_GetTicks(); 198 emscripten_set_main_loop(loop, 0, 1); 199#else 200 while (!done) { 201 ++frames; 202 loop(); 203 SDL_Delay(1000); 204 } 205#endif 206 207 /* Print out some timing information */ 208 now = SDL_GetTicks(); 209 if (now > then) { 210 double fps = ((double) frames * 1000) / (now - then); 211 SDL_Log("%2.2f frames per second\n", fps); 212 } 213 quit(0); 214 return 0; 215} 216 217/* vi: set ts=4 sw=4 expandtab: */ 218[FILE END](C) 2025 0x4248 (C) 2025 4248 Media and 4248 Systems, All part of 0x4248 See LICENCE files for more information. 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