kc3-lang/SDL/test/testviewport.c

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• Hash : 76a7b629
  Author :
  Date : 2022-04-12T13:07:18
  

  test: Add some common code to load test resources As well as reducing duplication, this lets the tests load their resources from the SDL_GetBasePath() on platforms that support it, which is useful if the tests are compiled along with the rest of SDL and installed below /usr as manual tests, similar to GNOME's installed-tests convention. Thanks to Ozkan Sezer for the OS/2 build glue. Co-authored-by: Ozkan Sezer <sezeroz@gmail.com> Signed-off-by: Simon McVittie <smcv@collabora.com>

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• test/testviewport.c

• /*
    Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
  
    This software is provided 'as-is', without any express or implied
    warranty.  In no event will the authors be held liable for any damages
    arising from the use of this software.
  
    Permission is granted to anyone to use this software for any purpose,
    including commercial applications, and to alter it and redistribute it
    freely.
  */
  /* Simple program:  Check viewports */
  
  #include <stdlib.h>
  #include <stdio.h>
  #include <time.h>
  
  #ifdef __EMSCRIPTEN__
  #include <emscripten/emscripten.h>
  #endif
  
  #include "SDL_test.h"
  #include "SDL_test_common.h"
  #include "testutils.h"
  
  static SDLTest_CommonState *state;
  
  static SDL_Rect viewport;
  static int done, j;
  static SDL_bool use_target = SDL_FALSE;
  #ifdef __EMSCRIPTEN__
  static Uint32 wait_start;
  #endif
  static SDL_Texture *sprite;
  static int sprite_w, sprite_h;
  
  /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
  static void
  quit(int rc)
  {
      SDLTest_CommonQuit(state);
      exit(rc);
  }
  
  void
  DrawOnViewport(SDL_Renderer * renderer)
  {    
      SDL_Rect rect;
  
      /* Set the viewport */
      SDL_RenderSetViewport(renderer, &viewport);
      
      /* Draw a gray background */
      SDL_SetRenderDrawColor(renderer, 0x80, 0x80, 0x80, 0xFF);
      SDL_RenderClear(renderer);
  
      /* Test inside points */
      SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0x00, 0xFF);
      SDL_RenderDrawPoint(renderer, viewport.h/2 + 20, viewport.w/2);
      SDL_RenderDrawPoint(renderer, viewport.h/2 - 20, viewport.w/2);
      SDL_RenderDrawPoint(renderer, viewport.h/2     , viewport.w/2 - 20);
      SDL_RenderDrawPoint(renderer, viewport.h/2     , viewport.w/2 + 20);
  
      /* Test horizontal and vertical lines */
      SDL_SetRenderDrawColor(renderer, 0x00, 0xFF, 0x00, 0xFF);
      SDL_RenderDrawLine(renderer, 1, 0, viewport.w-2, 0);
      SDL_RenderDrawLine(renderer, 1, viewport.h-1, viewport.w-2, viewport.h-1);
      SDL_RenderDrawLine(renderer, 0, 1, 0, viewport.h-2);
      SDL_RenderDrawLine(renderer, viewport.w-1, 1, viewport.w-1, viewport.h-2);
  
      /* Test diagonal lines */
      SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0xFF, 0xFF);
      SDL_RenderDrawLine(renderer, 0, 0, viewport.w-1, viewport.h-1);
      SDL_RenderDrawLine(renderer, viewport.w-1, 0, 0, viewport.h-1);                      
  
      /* Test outside points */
      SDL_SetRenderDrawColor(renderer, 0xFF, 0xFF, 0x00, 0xFF);
      SDL_RenderDrawPoint(renderer, viewport.h/2 + viewport.h, viewport.w/2);
      SDL_RenderDrawPoint(renderer, viewport.h/2 - viewport.h, viewport.w/2);
      SDL_RenderDrawPoint(renderer, viewport.h/2, viewport.w/2 - viewport.w);
      SDL_RenderDrawPoint(renderer, viewport.h/2, viewport.w/2 + viewport.w);
  
      /* Add a box at the top */
      rect.w = 8;
      rect.h = 8;
      rect.x = (viewport.w - rect.w) / 2;
      rect.y = 0;
      SDL_RenderFillRect(renderer, &rect);
  
      /* Add a clip rect and fill it with the sprite */
      SDL_QueryTexture(sprite, NULL, NULL, &rect.w, &rect.h);
      rect.x = (viewport.w - rect.w) / 2;
      rect.y = (viewport.h - rect.h) / 2;
      SDL_RenderSetClipRect(renderer, &rect);
      SDL_RenderCopy(renderer, sprite, NULL, &rect);
      SDL_RenderSetClipRect(renderer, NULL);
  }
  
  void
  loop()
  {
  #ifdef __EMSCRIPTEN__
      /* Avoid using delays */
      if(SDL_GetTicks() - wait_start < 1000)
          return;
      wait_start = SDL_GetTicks();
  #endif
      SDL_Event event;
      int i;
      /* Check for events */
      while (SDL_PollEvent(&event)) {
          SDLTest_CommonEvent(state, &event, &done);
      }
  
      /* Move a viewport box in steps around the screen */
      viewport.x = j * 100;
      viewport.y = viewport.x;
      viewport.w = 100 + j * 50;
      viewport.h = 100 + j * 50;
      j = (j + 1) % 4;
      SDL_Log("Current Viewport x=%i y=%i w=%i h=%i", viewport.x, viewport.y, viewport.w, viewport.h);
  
      for (i = 0; i < state->num_windows; ++i) {
          if (state->windows[i] == NULL)
              continue;
  
          /* Draw using viewport */
          DrawOnViewport(state->renderers[i]);
  
          /* Update the screen! */
          if (use_target) {
              SDL_SetRenderTarget(state->renderers[i], NULL);
              SDL_RenderCopy(state->renderers[i], state->targets[i], NULL, NULL);
              SDL_RenderPresent(state->renderers[i]);
              SDL_SetRenderTarget(state->renderers[i], state->targets[i]);
          } else {
              SDL_RenderPresent(state->renderers[i]);
          }
      }
  
  #ifdef __EMSCRIPTEN__
      if (done) {
          emscripten_cancel_main_loop();
      }
  #endif
  }
  
  int
  main(int argc, char *argv[])
  {
      int i;
      Uint32 then, now, frames;
  
      /* Initialize test framework */
      state = SDLTest_CommonCreateState(argv, SDL_INIT_VIDEO);
      if (!state) {
          return 1;
      }
  
  
      for (i = 1; i < argc;) {
          int consumed;
  
          consumed = SDLTest_CommonArg(state, i);
          if (consumed == 0) {
              consumed = -1;
              if (SDL_strcasecmp(argv[i], "--target") == 0) {
                  use_target = SDL_TRUE;
                  consumed = 1;
              }
          }
          if (consumed < 0) {
              static const char *options[] = { "[--target]", NULL };
              SDLTest_CommonLogUsage(state, argv[0], options);
              quit(1);
          }
          i += consumed;
      }
      if (!SDLTest_CommonInit(state)) {
          quit(2);
      }
  
      sprite = LoadTexture(state->renderers[0], "icon.bmp", SDL_TRUE, &sprite_w, &sprite_h);
  
      if (sprite == NULL) {
          quit(2);
      }
  
      if (use_target) {
          int w, h;
  
          for (i = 0; i < state->num_windows; ++i) {
              SDL_GetWindowSize(state->windows[i], &w, &h);
              state->targets[i] = SDL_CreateTexture(state->renderers[i], SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_TARGET, w, h);
              SDL_SetRenderTarget(state->renderers[i], state->targets[i]);
          }
      }
  
      for (i = 0; i < state->num_windows; ++i) {
          SDL_Renderer *renderer = state->renderers[i];
          SDL_SetRenderDrawColor(renderer, 0xA0, 0xA0, 0xA0, 0xFF);
          SDL_RenderClear(renderer);
      }
  
      /* Main render loop */
      frames = 0;
      then = SDL_GetTicks();
      done = 0;
      j = 0;
  
  #ifdef __EMSCRIPTEN__
      wait_start = SDL_GetTicks();
      emscripten_set_main_loop(loop, 0, 1);
  #else
      while (!done) {
          ++frames;
          loop();
          SDL_Delay(1000);
      }
  #endif
  
      /* Print out some timing information */
      now = SDL_GetTicks();
      if (now > then) {
          double fps = ((double) frames * 1000) / (now - then);
          SDL_Log("%2.2f frames per second\n", fps);
      }
      quit(0);
      return 0;
  }
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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