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SDL/src/video
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Sam Lantinga 54685787ca 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.
2017-09-26 15:07:35 -07:00
..
android Fixed bug 3799 - SDL_CreateWindow fails with SDL_WINDOW_VULKAN (libvulkan.so.1 not found) 2017-09-06 01:10:10 -07:00
cocoa Mac: Fix the menu bar not always working for non-.app-bundled apps. Fixes bug #3051. 2017-09-25 20:49:31 -03:00
directfb Fixed 3783 - Default libGL path for directFB on Linux differs from x11 path 2017-08-28 09:51:25 -07:00
dummy Updated copyright for 2017 2017-01-01 18:33:28 -08:00
emscripten Fixed mingw Windows build, since SDL_vulkan_internal.h includes windows.h 2017-08-28 00:43:14 -07:00
haiku Fixed mingw Windows build, since SDL_vulkan_internal.h includes windows.h 2017-08-28 00:43:14 -07:00
khronos Fixed bug 3616 - SDL_GL_CreateContext fails with SDL_GL_CONTEXT_DEBUG_FLAG and ANGLE/GLES 2.0 2017-08-29 22:04:43 -07:00
kmsdrm Fixed bug 3792 - [KMS/DRM] Wrong GBM format 2017-09-01 12:54:38 -07:00
mir Fixed mingw Windows build, since SDL_vulkan_internal.h includes windows.h 2017-08-28 00:43:14 -07:00
nacl Fixed mingw Windows build, since SDL_vulkan_internal.h includes windows.h 2017-08-28 00:43:14 -07:00
pandora Fixed mingw Windows build, since SDL_vulkan_internal.h includes windows.h 2017-08-28 00:43:14 -07:00
psp Fixed mingw Windows build, since SDL_vulkan_internal.h includes windows.h 2017-08-28 00:43:14 -07:00
qnx Fixed mingw Windows build, since SDL_vulkan_internal.h includes windows.h 2017-08-28 00:43:14 -07:00
raspberry Fixed bug 3805 - Why is there no --enable-video-rpi option in configure? 2017-09-08 22:21:01 -07:00
uikit iOS MoltenVK code style cleanup. 2017-09-21 20:30:25 -03:00
vivante Guarded EGL code with SDL_VIDEO_OPENGL_EGL 2017-09-22 08:30:37 -07:00
wayland Fixed mingw Windows build, since SDL_vulkan_internal.h includes windows.h 2017-08-28 00:43:14 -07:00
windows Fixed bug 3847 - Hit Test x coordinate wrong on secondary monitor 2017-09-26 15:07:35 -07:00
winrt Fixed mingw Windows build, since SDL_vulkan_internal.h includes windows.h 2017-08-28 00:43:14 -07:00
x11 x11: make sure SDL_GetGlobalMouseState notices mouse warping through SDL APIs. 2017-09-05 16:15:54 -04:00
SDL_blit.c Fixed bug 3745 - specify SDLCALL as the calling convention for API callbacks 2017-08-14 06:28:21 -07:00
SDL_blit.h Fixed bug 3815 - implicit-fallthrough warning - DUFFS_LOOP4 and friends 2017-09-10 12:49:41 -07:00
SDL_blit_0.c Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_blit_1.c Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_blit_A.c Fix some more compiler warnings on armcc. 2017-03-03 16:38:17 -05:00
SDL_blit_auto.c Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_blit_auto.h Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_blit_copy.c Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_blit_copy.h Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_blit_N.c Fixed comment style. 2017-02-26 21:20:39 +01:00
SDL_blit_slow.c Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_blit_slow.h Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_bmp.c Fix some more compiler warnings on armcc. 2017-03-03 16:38:17 -05:00
SDL_clipboard.c Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_egl.c [egl/mir] Need eglGetProc to find gl 4.5 core profile extensions 2017-09-21 18:38:07 -07:00
SDL_egl_c.h Fixed bug 3690 - SDL2 KMS/DRM render context support 2017-08-02 10:22:48 -07:00
SDL_fillrect.c Fixed bug 3780 - GCC 7 implicit fallthrough warnings 2017-09-06 04:32:30 -07:00
SDL_pixels.c surface: Make sure SDL_ConvertSurface() deals with palettes (thanks, Sylvain!). 2017-09-14 08:37:27 -04:00
SDL_pixels_c.h Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_rect.c Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_rect_c.h Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_RLEaccel.c Fixed bug 3745 - specify SDLCALL as the calling convention for API callbacks 2017-08-14 06:28:21 -07:00
SDL_RLEaccel_c.h Fixed bug 3745 - specify SDLCALL as the calling convention for API callbacks 2017-08-14 06:28:21 -07:00
SDL_shape.c Fixed bug 3699 - Shaped windows are distorted unless width is divisible by 8 2017-07-11 08:16:00 -07:00
SDL_shape_internals.h Updated copyright for 2017 2017-01-01 18:33:28 -08:00
SDL_stretch.c Fixed bug 3808 - fix a typo in SDL_stretch.c 2017-09-09 08:20:56 -07:00
SDL_surface.c surface: Make sure SDL_ConvertSurface() deals with palettes (thanks, Sylvain!). 2017-09-14 08:37:27 -04:00
SDL_sysvideo.h video: Let video targets optionally decide their default OpenGL configs. 2017-09-02 19:35:32 -04:00
SDL_video.c Fixed tabs to spaces 2017-09-10 12:40:45 -07:00
SDL_vulkan_internal.h Fixed build when Wayland is dynamically loaded 2017-08-28 01:42:18 -07:00
SDL_vulkan_utils.c Avoid hitting ERR_MAX_STRLEN limit. 2017-09-22 22:30:02 +09:00
sdlgenblit.pl Updated copyright for 2017 2017-01-01 18:33:28 -08:00