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-rw-r--r--src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp51
-rw-r--r--src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h19
2 files changed, 41 insertions, 29 deletions
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
index a976a02..0c01263 100644
--- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2.cpp
@@ -380,7 +380,7 @@ void QGL2PaintEngineExPrivate::useSimpleShader()
}
if (simpleShaderDepthUniformDirty) {
- shaderManager->simpleProgram()->setUniformValue("depth", (GLfloat)q->state()->currentDepth);
+ shaderManager->simpleProgram()->setUniformValue("depth", normalizedDeviceDepth(q->state()->currentDepth));
simpleShaderDepthUniformDirty = false;
}
}
@@ -731,7 +731,6 @@ void QGL2PaintEngineExPrivate::resetGLState()
glActiveTexture(GL_TEXTURE0);
glDisable(GL_DEPTH_TEST);
glDisable(GL_SCISSOR_TEST);
- glDepthFunc(GL_LESS);
glDepthMask(true);
glClearDepth(1);
}
@@ -959,7 +958,7 @@ bool QGL2PaintEngineExPrivate::prepareForDraw(bool srcPixelsAreOpaque)
}
if (depthUniformDirty) {
- shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::Depth), (GLfloat)q->state()->currentDepth);
+ shaderManager->currentProgram()->setUniformValue(location(QGLEngineShaderManager::Depth), normalizedDeviceDepth(q->state()->currentDepth));
depthUniformDirty = false;
}
@@ -1351,7 +1350,7 @@ bool QGL2PaintEngineEx::begin(QPaintDevice *pdev)
if (!d->inRenderText) {
glDisable(GL_DEPTH_TEST);
glDisable(GL_SCISSOR_TEST);
- glDepthFunc(GL_LEQUAL);
+ glDepthFunc(GL_LESS);
glDepthMask(false);
}
@@ -1441,7 +1440,7 @@ void QGL2PaintEngineEx::ensureActive()
if (d->needsSync) {
glViewport(0, 0, d->width, d->height);
glDepthMask(false);
- glDepthFunc(GL_LEQUAL);
+ glDepthFunc(GL_LESS);
setState(state());
d->needsSync = false;
}
@@ -1492,7 +1491,7 @@ void QGL2PaintEngineEx::clipEnabledChanged()
d->regenerateDepthClip();
} else {
if (d->use_system_clip) {
- state()->currentDepth = -0.5f;
+ state()->currentDepth = 0;
} else {
state()->depthTestEnabled = false;
}
@@ -1501,7 +1500,7 @@ void QGL2PaintEngineEx::clipEnabledChanged()
}
}
-void QGL2PaintEngineExPrivate::writeClip(const QVectorPath &path, float depth)
+void QGL2PaintEngineExPrivate::writeClip(const QVectorPath &path, uint depth)
{
transferMode(BrushDrawingMode);
@@ -1510,7 +1509,7 @@ void QGL2PaintEngineExPrivate::writeClip(const QVectorPath &path, float depth)
if (q->state()->needsDepthBufferClear) {
glDepthMask(true);
- glClearDepth(0.5);
+ glClearDepth(rawDepth(2));
glClear(GL_DEPTH_BUFFER_BIT);
q->state()->needsDepthBufferClear = false;
glDepthMask(false);
@@ -1532,7 +1531,7 @@ void QGL2PaintEngineExPrivate::writeClip(const QVectorPath &path, float depth)
glColorMask(false, false, false, false);
glDepthMask(true);
- shaderManager->simpleProgram()->setUniformValue("depth", depth);
+ shaderManager->simpleProgram()->setUniformValue("depth", normalizedDeviceDepth(depth));
simpleShaderDepthUniformDirty = true;
glEnable(GL_DEPTH_TEST);
@@ -1596,12 +1595,12 @@ void QGL2PaintEngineEx::clip(const QVectorPath &path, Qt::ClipOperation op)
glDepthFunc(GL_ALWAYS);
- state()->maxDepth = 0.5f;
+ state()->maxDepth = 4;
d->writeClip(qtVectorPathForPath(path), state()->maxDepth);
- state()->currentDepth = 0.25f;
+ state()->currentDepth = 3;
state()->depthTestEnabled = true;
- glDepthFunc(GL_LEQUAL);
+ glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
}
@@ -1610,7 +1609,7 @@ void QGL2PaintEngineEx::clip(const QVectorPath &path, Qt::ClipOperation op)
if (d->use_system_clip) {
glEnable(GL_DEPTH_TEST);
state()->depthTestEnabled = true;
- state()->currentDepth = -0.5;
+ state()->currentDepth = 0;
} else {
glDisable(GL_DEPTH_TEST);
state()->depthTestEnabled = false;
@@ -1618,18 +1617,18 @@ void QGL2PaintEngineEx::clip(const QVectorPath &path, Qt::ClipOperation op)
state()->canRestoreClip = false;
break;
case Qt::IntersectClip:
- state()->maxDepth = (1.0f + state()->maxDepth) * 0.5;
+ ++state()->maxDepth;
d->writeClip(path, state()->maxDepth);
- state()->currentDepth = 1.5 * state()->maxDepth - 0.5f;
+ state()->currentDepth = state()->maxDepth - 1;
state()->depthTestEnabled = true;
break;
case Qt::ReplaceClip:
d->systemStateChanged();
state()->rectangleClip = QRect();
- state()->maxDepth = 0.5f;
+ state()->maxDepth = 4;
glDepthFunc(GL_ALWAYS);
d->writeClip(path, state()->maxDepth);
- state()->currentDepth = 0.25f;
+ state()->currentDepth = 3;
state()->canRestoreClip = false;
state()->depthTestEnabled = true;
break;
@@ -1641,7 +1640,7 @@ void QGL2PaintEngineEx::clip(const QVectorPath &path, Qt::ClipOperation op)
break;
}
- glDepthFunc(GL_LEQUAL);
+ glDepthFunc(GL_LESS);
if (state()->depthTestEnabled) {
glEnable(GL_DEPTH_TEST);
d->simpleShaderDepthUniformDirty = true;
@@ -1672,8 +1671,8 @@ void QGL2PaintEngineExPrivate::systemStateChanged()
glDisable(GL_SCISSOR_TEST);
- q->state()->currentDepth = -0.5f;
- q->state()->maxDepth = 0.5f;
+ q->state()->currentDepth = 1;
+ q->state()->maxDepth = 4;
q->state()->rectangleClip = QRect(0, 0, width, height);
@@ -1708,8 +1707,8 @@ void QGL2PaintEngineExPrivate::systemStateChanged()
path.addRegion(systemClip);
glDepthFunc(GL_ALWAYS);
- writeClip(qtVectorPathForPath(path), 0.0f);
- glDepthFunc(GL_LEQUAL);
+ writeClip(qtVectorPathForPath(path), 2);
+ glDepthFunc(GL_LESS);
glEnable(GL_DEPTH_TEST);
q->state()->depthTestEnabled = true;
@@ -1718,7 +1717,7 @@ void QGL2PaintEngineExPrivate::systemStateChanged()
q->transformChanged();
}
- q->state()->currentDepth = -0.5f;
+ q->state()->currentDepth = 1;
simpleShaderDepthUniformDirty = true;
depthUniformDirty = true;
}
@@ -1757,7 +1756,7 @@ void QGL2PaintEngineEx::setState(QPainterState *new_state)
if (old_state && old_state != s && old_state->canRestoreClip) {
d->updateDepthScissorTest();
glDepthMask(false);
- glDepthFunc(GL_LEQUAL);
+ glDepthFunc(GL_LESS);
s->maxDepth = old_state->maxDepth;
} else {
d->regenerateDepthClip();
@@ -1802,8 +1801,8 @@ QOpenGL2PaintEngineState::QOpenGL2PaintEngineState()
needsDepthBufferClear = true;
depthTestEnabled = false;
scissorTestEnabled = false;
- currentDepth = -0.5f;
- maxDepth = 0.5f;
+ currentDepth = 1;
+ maxDepth = 4;
canRestoreClip = true;
hasRectangleClip = false;
}
diff --git a/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
index 58fcde1..552e390 100644
--- a/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
+++ b/src/opengl/gl2paintengineex/qpaintengineex_opengl2_p.h
@@ -82,8 +82,8 @@ public:
bool depthTestEnabled;
bool scissorTestEnabled;
- qreal currentDepth;
- qreal maxDepth;
+ uint maxDepth;
+ uint currentDepth;
bool canRestoreClip;
QRect rectangleClip;
@@ -230,13 +230,26 @@ public:
QGLEngineShaderManager* shaderManager;
- void writeClip(const QVectorPath &path, float depth);
+ void writeClip(const QVectorPath &path, uint depth);
void updateDepthScissorTest();
void setScissor(const QRect &rect);
void regenerateDepthClip();
void systemStateChanged();
uint use_system_clip : 1;
+ static inline GLfloat rawDepth(uint depth)
+ {
+ // assume at least 16 bits in the depth buffer, and
+ // use 2^15 depth levels to be safe with regard to
+ // rounding issues etc
+ return depth * (1.0f / GLfloat((1 << 15) - 1));
+ }
+
+ static inline GLfloat normalizedDeviceDepth(uint depth)
+ {
+ return 2.0f * rawDepth(depth) - 1.0f;
+ }
+
uint location(QGLEngineShaderManager::Uniform uniform)
{
return shaderManager->getUniformLocation(uniform);
generated by cgit v0.12 at 2024-08-28 20:01:10 (GMT)