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-rw-r--r--src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp69
-rw-r--r--src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h1
2 files changed, 41 insertions, 29 deletions
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
index 5875124..b3638ff 100644
--- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
@@ -391,7 +391,6 @@ void QGL2PaintEngineExPrivate::setBrush(const QBrush* brush)
}
-// Unless this gets used elsewhere, it's probably best to merge it into fillStencilWithVertexArray
void QGL2PaintEngineExPrivate::useSimpleShader()
{
shaderManager->simpleProgram()->enable();
@@ -891,16 +890,26 @@ void QGL2PaintEngineExPrivate::fill(const QVectorPath& path)
fillStencilWithVertexArray(vertexCoordinateArray, path.hasWindingFill());
- // Stencil the brush onto the dest buffer
- glStencilFunc(GL_EQUAL, GL_STENCIL_HIGH_BIT, GL_STENCIL_HIGH_BIT); // Pass if stencil buff value != 0
- glStencilOp(GL_KEEP, GL_ZERO, GL_ZERO);
- glStencilMask(GL_STENCIL_HIGH_BIT);
+ glStencilMask(0xff);
+ glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
+
+ if (q->state()->clipTestEnabled) {
+ // Pass when high bit is set, replace stencil value with current clip
+ glStencilFunc(GL_NOTEQUAL, q->state()->currentClip, GL_STENCIL_HIGH_BIT);
+ } else if (path.hasWindingFill()) {
+ // Pass when any bit is set, replace stencil value with 0
+ glStencilFunc(GL_NOTEQUAL, 0, 0xff);
+ } else {
+ // Pass when high bit is set, replace stencil value with 0
+ glStencilFunc(GL_NOTEQUAL, 0, GL_STENCIL_HIGH_BIT);
+ }
prepareForDraw(currentBrush->isOpaque());
if (inRenderText)
prepareDepthRangeForRenderText();
+ // Stencil the brush onto the dest buffer
composite(vertexCoordinateArray.boundingRect());
if (inRenderText)
@@ -916,7 +925,7 @@ void QGL2PaintEngineExPrivate::fill(const QVectorPath& path)
void QGL2PaintEngineExPrivate::fillStencilWithVertexArray(QGL2PEXVertexArray& vertexArray, bool useWindingFill)
{
// qDebug("QGL2PaintEngineExPrivate::fillStencilWithVertexArray()");
- glStencilMask(0xffff); // Enable stencil writes
+ glStencilMask(0xff); // Enable stencil writes
if (dirtyStencilRegion.intersects(currentScissorBounds)) {
QVector<QRect> clearRegion = dirtyStencilRegion.intersected(currentScissorBounds).rects();
@@ -948,39 +957,30 @@ void QGL2PaintEngineExPrivate::fillStencilWithVertexArray(QGL2PEXVertexArray& ve
if (useWindingFill) {
if (q->state()->clipTestEnabled) {
+ // Flatten clip values higher than current clip, and set high bit to match current clip
glStencilFunc(GL_LEQUAL, GL_STENCIL_HIGH_BIT | q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
composite(vertexArray.boundingRect());
glStencilFunc(GL_EQUAL, GL_STENCIL_HIGH_BIT, GL_STENCIL_HIGH_BIT);
- } else {
- glStencilFunc(GL_ALWAYS, 0, 0xffff);
+ } else if (!stencilClean) {
+ // Clear stencil buffer within bounding rect
+ glStencilFunc(GL_ALWAYS, 0, 0xff);
glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO);
composite(vertexArray.boundingRect());
}
// Inc. for front-facing triangle
glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_INCR_WRAP, GL_INCR_WRAP);
- //Dec. for back-facing "holes"
+ // Dec. for back-facing "holes"
glStencilOpSeparate(GL_BACK, GL_KEEP, GL_DECR_WRAP, GL_DECR_WRAP);
glStencilMask(~GL_STENCIL_HIGH_BIT);
drawVertexArrays(vertexArray, GL_TRIANGLE_FAN);
if (q->state()->clipTestEnabled) {
- // clear high bit of stencil outside of path
- glStencilFunc(GL_EQUAL, GL_STENCIL_HIGH_BIT | q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
- glStencilOp(GL_KEEP, GL_INVERT, GL_INVERT);
- glStencilMask(GL_STENCIL_HIGH_BIT);
- composite(vertexArray.boundingRect());
- // reset lower bits of stencil inside path to current clip
- glStencilFunc(GL_EQUAL, GL_STENCIL_HIGH_BIT | q->state()->currentClip, GL_STENCIL_HIGH_BIT);
+ // Clear high bit of stencil outside of path
+ glStencilFunc(GL_EQUAL, q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
- glStencilMask(~GL_STENCIL_HIGH_BIT);
- composite(vertexArray.boundingRect());
- } else {
- // set high bit of stencil inside path
- glStencilFunc(GL_NOTEQUAL, 0, 0xffff);
- glStencilOp(GL_KEEP, GL_INVERT, GL_INVERT);
glStencilMask(GL_STENCIL_HIGH_BIT);
composite(vertexArray.boundingRect());
}
@@ -1020,7 +1020,7 @@ void QGL2PaintEngineExPrivate::resetClipIfNeeded()
QGLRect rect(bounds.left(), bounds.top(), bounds.right(), bounds.bottom());
// Set high bit on clip region
- glStencilFunc(GL_LEQUAL, q->state()->currentClip, 0xffff);
+ glStencilFunc(GL_LEQUAL, q->state()->currentClip, 0xff);
glStencilOp(GL_KEEP, GL_INVERT, GL_INVERT);
glStencilMask(GL_STENCIL_HIGH_BIT);
composite(rect);
@@ -1028,7 +1028,7 @@ void QGL2PaintEngineExPrivate::resetClipIfNeeded()
// Reset clipping to 1 and everything else to zero
glStencilFunc(GL_NOTEQUAL, 0x01, GL_STENCIL_HIGH_BIT);
glStencilOp(GL_ZERO, GL_REPLACE, GL_REPLACE);
- glStencilMask(0xFFFF);
+ glStencilMask(0xff);
composite(rect);
q->state()->currentClip = 1;
@@ -1636,6 +1636,7 @@ bool QGL2PaintEngineEx::begin(QPaintDevice *pdev)
d->use_system_clip = !systemClip().isEmpty();
d->dirtyStencilRegion = QRect(0, 0, d->width, d->height);
+ d->stencilClean = true;
// Calling begin paint should make the correct context current. So, any
// code which calls into GL or otherwise needs a current context *must*
@@ -1731,7 +1732,7 @@ void QGL2PaintEngineExPrivate::updateClipScissorTest()
glStencilFunc(GL_LEQUAL, q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
} else {
glDisable(GL_STENCIL_TEST);
- glStencilFunc(GL_ALWAYS, 0, 0xffff);
+ glStencilFunc(GL_ALWAYS, 0, 0xff);
}
#ifdef QT_GL_NO_SCISSOR_TEST
@@ -1787,7 +1788,7 @@ void QGL2PaintEngineExPrivate::clearClip(uint value)
{
dirtyStencilRegion -= currentScissorBounds;
- glStencilMask(0xffff);
+ glStencilMask(0xff);
glClearStencil(value);
glClear(GL_STENCIL_BUFFER_BIT);
glStencilMask(0x0);
@@ -1802,6 +1803,8 @@ void QGL2PaintEngineExPrivate::writeClip(const QVectorPath &path, uint value)
if (matrixDirty)
updateMatrix();
+ stencilClean = false;
+
const bool singlePass = !path.hasWindingFill()
&& (((q->state()->currentClip == maxClip - 1) && q->state()->clipTestEnabled)
|| q->state()->needsClipBufferClear);
@@ -1819,7 +1822,7 @@ void QGL2PaintEngineExPrivate::writeClip(const QVectorPath &path, uint value)
if (q->state()->clipTestEnabled)
glStencilFunc(GL_LEQUAL, q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
else
- glStencilFunc(GL_ALWAYS, 0, 0xffff);
+ glStencilFunc(GL_ALWAYS, 0, 0xff);
vertexCoordinateArray.clear();
vertexCoordinateArray.addPath(path, inverseScale);
@@ -1841,9 +1844,17 @@ void QGL2PaintEngineExPrivate::writeClip(const QVectorPath &path, uint value)
drawVertexArrays(vertexCoordinateArray, GL_TRIANGLE_FAN);
} else {
- glStencilFunc(GL_NOTEQUAL, value, GL_STENCIL_HIGH_BIT);
glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
- glStencilMask(0xffff);
+ glStencilMask(0xff);
+
+ if (!q->state()->clipTestEnabled && path.hasWindingFill()) {
+ // Pass when any clip bit is set, set high bit
+ glStencilFunc(GL_NOTEQUAL, GL_STENCIL_HIGH_BIT, ~GL_STENCIL_HIGH_BIT);
+ composite(vertexCoordinateArray.boundingRect());
+ }
+
+ // Pass when high bit is set, replace stencil value with new clip value
+ glStencilFunc(GL_NOTEQUAL, value, GL_STENCIL_HIGH_BIT);
composite(vertexCoordinateArray.boundingRect());
}
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
index 28c972e..46be398 100644
--- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
@@ -223,6 +223,7 @@ public:
bool shaderMatrixUniformDirty;
bool opacityUniformDirty;
+ bool stencilClean; // Has the stencil not been used for clipping so far?
QRegion dirtyStencilRegion;
QRect currentScissorBounds;
uint maxClip;
generated by cgit v0.12 at 2024-12-29 08:56:35 (GMT)