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* [bug#38279] [PATCH 0/1] gnu: sdl: Fix cursor color.
@ 2019-11-19 18:14 Oleg Pykhalov
  2019-11-19 18:23 ` [bug#38279] [PATCH 1/1] gnu: sdl: Add libxcursor to propagated-inputs Oleg Pykhalov
  2019-11-19 21:19 ` [bug#38279] [PATCH 0/1] gnu: sdl: Fix cursor color Marius Bakke
  0 siblings, 2 replies; 7+ messages in thread
From: Oleg Pykhalov @ 2019-11-19 18:14 UTC (permalink / raw)
  To: 38279; +Cc: Oleg Pykhalov

Hello.

This patch fixes corrupted mouse cursor image in tome4 and probably other SDL2
dependent programs.

You could reproduce it with the following code:

--8<---------------cut here---------------start------------->8---
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>

int
main(int argc, char *argv[])
{
  SDL_Window *window = NULL;
  SDL_Renderer *renderer = NULL;
  SDL_Surface *surface = NULL;
  SDL_Cursor *cursor = NULL;
  SDL_bool error = SDL_TRUE;

  if (SDL_Init(SDL_INIT_VIDEO) < 0) {
    goto exit;
  }
  if (SDL_CreateWindowAndRenderer(640, 480, 0, &window, &renderer) < 0) {
    goto exit;
  }
  surface = IMG_Load("mouse.png");;
  if (!surface) {
    goto exit;
  }
  cursor = SDL_CreateColorCursor(surface, 0, 0);
  if (!cursor) {
    goto exit;
  }

  SDL_SetCursor(cursor);
  SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
  while (SDL_TRUE) {
    SDL_Event event;
    while (SDL_PollEvent(&event)) {
      switch (event.type) {
      case SDL_MOUSEBUTTONUP:
      case SDL_QUIT:
        error = SDL_FALSE;
        goto exit;
      }
    }
    SDL_RenderClear(renderer);
    SDL_RenderPresent(renderer);
  }

 exit:
  if (error) {
    SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "%s", SDL_GetError());
  }
  if (cursor) {
    SDL_FreeCursor(cursor);
  }
  if (surface) {
    SDL_FreeSurface(surface);
  }
  if (renderer) {
    SDL_DestroyRenderer(renderer);
  }
  if (window) {
    SDL_DestroyWindow(window);
  }
  SDL_Quit();
  return error;
}
--8<---------------cut here---------------end--------------->8---

mouse.png could be retrieved from
https://git.net-core.org/tome/t-engine4/blob/454dc2f02f8f5bab4ee9e40b20c7d4d8618a0222/game/engines/default/data/gfx/dark-ui/mouse.png

$ guix environment --pure tome4 --ad-hoc gcc-toolchain coreutils findutils strace
$ gcc -o cursor -lSDL2 -lSDL2_image main.c
$ ./cursor

Oleg Pykhalov (1):
  gnu: sdl: Add libxcursor to propagated-inputs.

 gnu/packages/sdl.scm | 1 +
 1 file changed, 1 insertion(+)

-- 
2.24.0

^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2019-11-24  0:45 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-11-19 18:14 [bug#38279] [PATCH 0/1] gnu: sdl: Fix cursor color Oleg Pykhalov
2019-11-19 18:23 ` [bug#38279] [PATCH 1/1] gnu: sdl: Add libxcursor to propagated-inputs Oleg Pykhalov
2019-11-19 21:00   ` Efraim Flashner
2019-11-20 22:35     ` Oleg Pykhalov
2019-11-21 18:25       ` Marius Bakke
2019-11-24  0:44         ` bug#38279: " Oleg Pykhalov
2019-11-19 21:19 ` [bug#38279] [PATCH 0/1] gnu: sdl: Fix cursor color Marius Bakke

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