AuroraMiddleware/qt5base-lts
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add some debug warnings to the GL paint engine regarding stencil

Browse Source 
There is absolutely nothing we can do if the render target has no
stencil buffer, but print at least a warning in debug builds to give a
hint to the developer.

Pick-to: 6.2
Task-number: QTBUG-96786
Change-Id: If7f84f28f9bc9b3dadd01d0816c8db4015a1db0b
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
This commit is contained in:
Laszlo Agocs 2021-09-22 18:16:20 +02:00
parent e9cef8e7fa
commit e5d65996a9
1 changed files with 8 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/opengl/qopenglpaintengine.cpp
View File

@ -1124,6 +1124,10 @@ void QOpenGL2PaintEngineExPrivate::fillStencilWithVertexArray(const float *data,
funcs.glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); // Disable color writes
useSimpleShader();
#ifndef QT_NO_DEBUG
if (ctx->format().stencilBufferSize() <= 0)
qWarning("OpenGL paint engine: attempted to use stencil test without requesting a stencil buffer.");
#endif
funcs.glEnable(GL_STENCIL_TEST); // For some reason, this has to happen _after_ the simple shader is use()'d
if (mode == WindingFillMode) {
@ -2346,6 +2350,10 @@ void QOpenGL2PaintEngineExPrivate::updateClipScissorTest()
{
Q_Q(QOpenGL2PaintEngineEx);
if (q->state()->clipTestEnabled) {
#ifndef QT_NO_DEBUG
if (ctx->format().stencilBufferSize() <= 0)
qWarning("OpenGL paint engine: attempted to use stencil test for clipping without requesting a stencil buffer.");
#endif
funcs.glEnable(GL_STENCIL_TEST);
funcs.glStencilFunc(GL_LEQUAL, q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
} else {