kc3-lang/SDL/test/testrendercopyex.c

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• Hash : 0e45984f
  Author :
  Date : 2015-06-21T17:33:46
  

  Fixed crash if initialization of EGL failed but was tried again later. The internal function SDL_EGL_LoadLibrary() did not delete and remove a mostly uninitialized data structure if loading the library first failed. A later try to use EGL then skipped initialization and assumed it was previously successful because the data structure now already existed. This led to at least one crash in the internal function SDL_EGL_ChooseConfig() because a NULL pointer was dereferenced to make a call to eglBindAPI().

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• test/testrendercopyex.c

• /*
    Copyright (C) 1997-2015 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:  Move N sprites around on the screen as fast as possible */
  
  #include <stdlib.h>
  #include <stdio.h>
  #include <time.h>
  
  #ifdef __EMSCRIPTEN__
  #include <emscripten/emscripten.h>
  #endif
  
  #include "SDL_test_common.h"
  
  
  static SDLTest_CommonState *state;
  
  typedef struct {
      SDL_Window *window;
      SDL_Renderer *renderer;
      SDL_Texture *background;
      SDL_Texture *sprite;
      SDL_Rect sprite_rect;
      int scale_direction;
  } DrawState;
  
  DrawState *drawstates;
  int done;
  
  /* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
  static void
  quit(int rc)
  {
      SDLTest_CommonQuit(state);
      exit(rc);
  }
  
  SDL_Texture *
  LoadTexture(SDL_Renderer *renderer, char *file, SDL_bool transparent)
  {
      SDL_Surface *temp;
      SDL_Texture *texture;
  
      /* Load the sprite image */
      temp = SDL_LoadBMP(file);
      if (temp == NULL) {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't load %s: %s", file, SDL_GetError());
          return NULL;
      }
  
      /* Set transparent pixel as the pixel at (0,0) */
      if (transparent) {
          if (temp->format->palette) {
              SDL_SetColorKey(temp, SDL_TRUE, *(Uint8 *) temp->pixels);
          } else {
              switch (temp->format->BitsPerPixel) {
              case 15:
                  SDL_SetColorKey(temp, SDL_TRUE,
                                  (*(Uint16 *) temp->pixels) & 0x00007FFF);
                  break;
              case 16:
                  SDL_SetColorKey(temp, SDL_TRUE, *(Uint16 *) temp->pixels);
                  break;
              case 24:
                  SDL_SetColorKey(temp, SDL_TRUE,
                                  (*(Uint32 *) temp->pixels) & 0x00FFFFFF);
                  break;
              case 32:
                  SDL_SetColorKey(temp, SDL_TRUE, *(Uint32 *) temp->pixels);
                  break;
              }
          }
      }
  
      /* Create textures from the image */
      texture = SDL_CreateTextureFromSurface(renderer, temp);
      if (!texture) {
          SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create texture: %s\n", SDL_GetError());
          SDL_FreeSurface(temp);
          return NULL;
      }
      SDL_FreeSurface(temp);
  
      /* We're ready to roll. :) */
      return texture;
  }
  
  void
  Draw(DrawState *s)
  {
      SDL_Rect viewport;
      SDL_Texture *target;
      SDL_Point *center=NULL;
      SDL_Point origin = {0,0};
  
      SDL_RenderGetViewport(s->renderer, &viewport);
  
      target = SDL_CreateTexture(s->renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_TARGET, viewport.w, viewport.h);
      SDL_SetRenderTarget(s->renderer, target);
  
      /* Draw the background */
      SDL_RenderCopy(s->renderer, s->background, NULL, NULL);
  
      /* Scale and draw the sprite */
      s->sprite_rect.w += s->scale_direction;
      s->sprite_rect.h += s->scale_direction;
      if (s->scale_direction > 0) {
          center = &origin;
          if (s->sprite_rect.w >= viewport.w || s->sprite_rect.h >= viewport.h) {
              s->scale_direction = -1;
          }
      } else {
          if (s->sprite_rect.w <= 1 || s->sprite_rect.h <= 1) {
              s->scale_direction = 1;
          }
      }
      s->sprite_rect.x = (viewport.w - s->sprite_rect.w) / 2;
      s->sprite_rect.y = (viewport.h - s->sprite_rect.h) / 2;
  
      SDL_RenderCopyEx(s->renderer, s->sprite, NULL, &s->sprite_rect, (double)s->sprite_rect.w, center, s->scale_direction);
  
      SDL_SetRenderTarget(s->renderer, NULL);
      SDL_RenderCopy(s->renderer, target, NULL, NULL);
      SDL_DestroyTexture(target);
  
      /* Update the screen! */
      SDL_RenderPresent(s->renderer);
      /* SDL_Delay(10); */
  }
  
  void loop()
  {
      int i;
      SDL_Event event;
  
      /* Check for events */
  
      while (SDL_PollEvent(&event)) {
          SDLTest_CommonEvent(state, &event, &done);
      }
      for (i = 0; i < state->num_windows; ++i) {
          if (state->windows[i] == NULL)
              continue;
          Draw(&drawstates[i]);
      }
  #ifdef __EMSCRIPTEN__
      if (done) {
          emscripten_cancel_main_loop();
      }
  #endif
  }
  
  int
  main(int argc, char *argv[])
  {
      int i;
      int frames;
      Uint32 then, now;
  
  	/* Enable standard application logging */
      SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
  
      /* 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) {
              SDL_Log("Usage: %s %s\n", argv[0], SDLTest_CommonUsage(state));
              return 1;
          }
          i += consumed;
      }
      if (!SDLTest_CommonInit(state)) {
          quit(2);
      }
  
      drawstates = SDL_stack_alloc(DrawState, state->num_windows);
      for (i = 0; i < state->num_windows; ++i) {
          DrawState *drawstate = &drawstates[i];
  
          drawstate->window = state->windows[i];
          drawstate->renderer = state->renderers[i];
          drawstate->sprite = LoadTexture(drawstate->renderer, "icon.bmp", SDL_TRUE);
          drawstate->background = LoadTexture(drawstate->renderer, "sample.bmp", SDL_FALSE);
          if (!drawstate->sprite || !drawstate->background) {
              quit(2);
          }
          SDL_QueryTexture(drawstate->sprite, NULL, NULL,
                           &drawstate->sprite_rect.w, &drawstate->sprite_rect.h);
          drawstate->scale_direction = 1;
      }
  
      /* Main render loop */
      frames = 0;
      then = SDL_GetTicks();
      done = 0;
  
  #ifdef __EMSCRIPTEN__
      emscripten_set_main_loop(loop, 0, 1);
  #else
      while (!done) {
          ++frames;
          loop();
          }
  #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);
      }
  
      SDL_stack_free(drawstates);
  
      quit(0);
      return 0;
  }
  
  /* vi: set ts=4 sw=4 expandtab: */
  

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