To fix this we need to ignore the alpha channel in the colorkey comparison, which is the way colorkey comparisons are defined in SDL.
We also need to reset the alpha and color modulation when converting a surface.
If the user is using their context from a non-main thread, we could be
calling -[NSOpenGLContext update] on our thread, while they were
accessing it on their thread.
With this change, we schedule updates when the event comes in on the
main thread, and act on them when the user calls SDL_GL_MakeCurrent or
SDL_GL_SwapWindow.
This uses a better mouse grab if you define SDL_MAC_NO_SANDBOX. This
mouse grab uses CGEventTapCreate, which you cannot access if you have
sandboxing enabled.
From Sythical:
Hello, I've created a simple SDL2 application which draws a texture on the screen. The problem I'm having is that if I launch another program which loads the UAC popup or if I lock my PC and then login again, the application stops drawing the texture. I tried adding SDL_Delay(10000) after SDL_RenderPresent(renderer). This made the texture stay on the screen for a little bit but the texture wasn't drawn again after the delay. Here's my code:
#include "SDL.h"
int main(int argc, char *argv[])
{
SDL_Renderer *renderer;
SDL_Window *window;
SDL_Surface *surface;
SDL_Texture *rect_texture;
SDL_Event main_event;
SDL_Rect rect_data;
int enable_vsync = 1;
if(SDL_Init(SDL_INIT_VIDEO) < 0) return 1;
window = SDL_CreateWindow("SDL2 Application", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 600, 600, SDL_WINDOW_RESIZABLE);
renderer = SDL_CreateRenderer(window, -1, enable_vsync ? SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC : SDL_RENDERER_ACCELERATED);
SDL_SetRenderDrawColor(renderer, 20, 20, 30, 255);
surface = SDL_LoadBMP("icon.bmp");
rect_texture = SDL_CreateTextureFromSurface(renderer, surface);
rect_data.w = 32; rect_data.h = 32;
rect_data.x = 300; rect_data.y = 300;
while(main_event.type != SDL_QUIT)
{
SDL_PollEvent(&main_event);
SDL_RenderClear(renderer);
SDL_RenderCopy(renderer, rect_texture, NULL, &rect_data);
SDL_RenderPresent(renderer);
}
SDL_DestroyTexture(rect_texture);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
return 0;
}
This prevents a rogue call to SetWindowPos() from changing the state unexpectedly.
Also moved the size correction code above the window position query, because the initial window size can affect the positioning.
Andreas
With the patch applied, make is not able to find the rule for Makefile.in anymore. Removing the patch resolves the issue.
The path is in fact correct (in my case: /c/external/SDL64/SDL). But it seems the windows build of GNU Make doesn't work well with pathnames in rules. Both the dependencies in "$(srcdir)/configure: $(srcdir)/configure.in" and "Makefile: $(srcdir)/Makefile.in" will cause rules not to be found when srcdir is defined.
The same problem occurs if the patch is removed and I supply configure with a srcdir manually.
