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WGL: Fix count of displayable pixel formats

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We only care about displayable pixel formats (as defined in
WGL_ARB_pixel_format) for window context creation.

This changes pixel format enumeration to ignore non-displayable formats,
which are specified to be listed after displayable ones, by always using
the return value of DescribePixelFormat as the pixel format count.
This commit is contained in:
Camilla Löwy 2022-04-24 22:31:28 +02:00
parent ef6c9d8b4f
commit 2c0f34b60f
1 changed files with 5 additions and 17 deletions
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22
src/wgl_context.c
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@ -72,18 +72,13 @@ static int choosePixelFormatWGL(_GLFWwindow* window,
int attribs[40];
int values[sizeof(attribs) / sizeof(attribs[0])];
nativeCount = DescribePixelFormat(window->context.wgl.dc,
1,
sizeof(PIXELFORMATDESCRIPTOR),
NULL);
if (_glfw.wgl.ARB_pixel_format)
{
const int attrib = WGL_NUMBER_PIXEL_FORMATS_ARB;
if (!wglGetPixelFormatAttribivARB(window->context.wgl.dc,
1, 0, 1, &attrib, &nativeCount))
{
_glfwInputErrorWin32(GLFW_PLATFORM_ERROR,
"WGL: Failed to retrieve pixel format attribute");
return 0;
}
ADD_ATTRIB(WGL_SUPPORT_OPENGL_ARB);
ADD_ATTRIB(WGL_DRAW_TO_WINDOW_ARB);
ADD_ATTRIB(WGL_PIXEL_TYPE_ARB);
@ -121,13 +116,6 @@ static int choosePixelFormatWGL(_GLFWwindow* window,
ADD_ATTRIB(WGL_COLORSPACE_EXT);
}
}
else
{
nativeCount = DescribePixelFormat(window->context.wgl.dc,
1,
sizeof(PIXELFORMATDESCRIPTOR),
NULL);
}
usableConfigs = _glfw_calloc(nativeCount, sizeof(_GLFWfbconfig));