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Skip initial buffer swap when single-buffered

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This skips the buffer swap after the initial glClear performed during
window creation, if the window is single-buffered.  This call confused
apitrace into thinking the window was double-buffered.

Fixes #1873.
This commit is contained in:
Camilla Löwy 2021-05-13 21:41:51 +02:00
parent 04f21abb52
commit 184377b493
2 changed files with 4 additions and 1 deletions
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1
README.md
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@ -140,6 +140,7 @@ information on what to include when reporting a bug.
- Bugfix: Built-in mappings failed because some OEMs re-used VID/PID (#1583)
- Bugfix: Some extension loader headers did not prevent default OpenGL header
inclusion (#1695)
- Bugfix: Buffers were swapped at creation on single-buffered windows (#1873)
- [Win32] Added the `GLFW_WIN32_KEYBOARD_MENU` window hint for enabling access
to the window menu
- [Win32] Added a version info resource to the GLFW DLL

2
src/context.c
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@ -570,6 +570,8 @@ GLFWbool _glfwRefreshContextAttribs(_GLFWwindow* window,
PFNGLCLEARPROC glClear = (PFNGLCLEARPROC)
window->context.getProcAddress("glClear");
glClear(GL_COLOR_BUFFER_BIT);
if (window->doublebuffer)
window->context.swapBuffers(window);
}