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The code that reproduces the memory leak when using SDL_RenderCopy

main.c (text/x-csrc), 2.11 KB, created by Miguel Dorta on 2020-12-02 10:26:16 UTC

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Description:

Filename:

MIME Type:

Creator: Miguel Dorta

Created: 2020-12-02 10:26:16 UTC

Size: 2.11 KB

patch

obsolete

>#include <SDL2/SDL.h>
>
>#if SDL_BYTEORDER == SDL_BIG_ENDIAN
>Uint32 _rmask = 0xff000000;
>Uint32 _gmask = 0x00ff0000;
>Uint32 _bmask = 0x0000ff00;
>Uint32 _amask = 0x000000ff;
>#else
>Uint32 _rmask = 0x000000ff;
>Uint32 _gmask = 0x0000ff00;
>Uint32 _bmask = 0x00ff0000;
>Uint32 _amask = 0xff000000;
>#endif
>
>int main() {
>  SDL_Init(SDL_INIT_EVERYTHING);
>
>  SDL_Window *window =
>      SDL_CreateWindow("memory leak test", SDL_WINDOWPOS_CENTERED,
>                       SDL_WINDOWPOS_CENTERED, 1280, 720, 0);
>
>  SDL_Renderer *renderer =
>      SDL_CreateRenderer(window, -1, SDL_RENDERER_PRESENTVSYNC);
>
>  SDL_Surface *testSurface =
>      SDL_CreateRGBSurface(0, 1, 1, 32, _rmask, _gmask, _bmask, _amask);
>
>  SDL_FillRect(testSurface, NULL,
>               SDL_MapRGBA(testSurface->format, 10, 44, 76, 255));
>
>  SDL_Texture *testTexture =
>      SDL_CreateTextureFromSurface(renderer, testSurface);
>
>  SDL_Event event;
>
>  int columns = 500;
>  int rows = 500;
>  double cameraOffsetX = 100.0;
>  double cameraOffsetY = 0.0;
>  int tileSize = 2;
>  bool quit = false;
>
>  while (!quit) {
>    while (SDL_PollEvent(&event)) {
>      switch (event.type) {
>      case SDL_QUIT:
>        quit = true;
>        break;
>      case SDL_KEYDOWN:
>        if (event.key.keysym.sym == SDLK_ESCAPE) {
>          quit = true;
>        }
>        break;
>      }
>    }
>
>    if (cameraOffsetX > -300.0) {
>      // Memory starts leaking when tiles are drawn outside of the viewport
>      // As soon as the offset stop moving the memory leaking stops
>      // This is running SDL 2.0.12 on macOS 10.15.6
>      cameraOffsetX -= 1.0;
>    }
>
>    SDL_RenderClear(renderer);
>
>    for (int tileX = 0; tileX < columns; tileX++) {
>      int x = tileX * tileSize + cameraOffsetX;
>      for (int tileY = 0; tileY < rows; tileY++) {
>        int y = tileY * tileSize + cameraOffsetY;
>        SDL_Rect tilePosition = {x, y, tileSize, tileSize};
>        SDL_RenderCopy(renderer, testTexture, NULL, &tilePosition);
>      }
>    }
>
>    SDL_RenderPresent(renderer);
>  }
>
>  SDL_FreeSurface(testSurface);
>  SDL_DestroyTexture(testTexture);
>  SDL_DestroyRenderer(renderer);
>  SDL_DestroyWindow(window);
>
>  SDL_Quit();
>
>  return 0;
>}

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Attachments on bug 5377: 4554

We are currently migrating Bugzilla to GitHub issues.Any changes made to the bug tracker now will be lost, so please do not post new bugs or make changes to them.When we're done, all bug URLs will redirect to their equivalent location on the new bug tracker.

We are currently migrating Bugzilla to GitHub issues.
Any changes made to the bug tracker now will be lost, so please do not post new bugs or make changes to them.
When we're done, all bug URLs will redirect to their equivalent location on the new bug tracker.