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Windows QPA: Fix pixel format looping in describeFormats()

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As per MSDN, pixel format indices are 1-based, not 0-based.

Change-Id: I6083144d3a95626e45bea21b50096b5f5f811c67
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
This commit is contained in:
Frank Richter 2019-09-09 09:32:40 +02:00
parent deee560954
commit 82c6911d7d
1 changed files with 1 additions and 1 deletions
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2
src/plugins/platforms/windows/qwindowsglcontext.cpp
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@ -323,7 +323,7 @@ static inline bool
static void describeFormats(HDC hdc) static void describeFormats(HDC hdc)
{ {
const int pfiMax = DescribePixelFormat(hdc, 0, 0, nullptr); const int pfiMax = DescribePixelFormat(hdc, 0, 0, nullptr);
for (int i = 0; i < pfiMax; i++) { for (int i = 1; i <= pfiMax; i++) {
PIXELFORMATDESCRIPTOR pfd; PIXELFORMATDESCRIPTOR pfd;
initPixelFormatDescriptor(&pfd); initPixelFormatDescriptor(&pfd);
DescribePixelFormat(hdc, i, sizeof(PIXELFORMATDESCRIPTOR), &pfd); DescribePixelFormat(hdc, i, sizeof(PIXELFORMATDESCRIPTOR), &pfd);