kc3-lang/SDL/src

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  Commit

• Hash : 54685787
  Author :
  Date : 2017-09-26T15:07:35
  

  Fixed bug 3847 - Hit Test x coordinate wrong on secondary monitor
  
  Robert Turner
  
  SDL_windowsevents.c contains code to retrieve the x and y coordinate for a requested hit test. It does this as follows:
  
      POINT winpoint = { (int) LOWORD(lParam), (int) HIWORD(lParam) };
  
  LOWORD(lParam) does not correctly mask off high bits that are set if the point is on a second (or third, etc.) monitor. This effectively offsets the x-coordinate by a large value.
  
  MSDN documentation suggests that LOWORD() and HIWORD() are the wrong macros for the task, instead suggesting we should be doing something like the following:
  
      POINT winpoint = { GET_X_LPARAM(lParam), GET_Y_LPARAM(lParam) };
  
  Testing this change on my Windows 10 machine with 2 monitors gives the correct results.
  

• Files

• SDL.c
• SDL_assert.c
• SDL_assert_c.h
• SDL_dataqueue.c
• SDL_dataqueue.h
• SDL_error.c
• SDL_error_c.h
• SDL_hints.c
• SDL_internal.h
• SDL_log.c
• atomic/
• audio/
• core/
• cpuinfo/
• dynapi/
• events/
• file/
• filesystem/
• haptic/
• joystick/
• libm/
• loadso/
• main/
• power/
• render/
• stdlib/
• test/
• thread/
• timer/
• video/

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  Git SSH	git@git.kmx.io:kc3-lang/SDL.git
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