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43 When the active program changes, we need to update it's uniforms.
44 We could track state for each program and only update stale uniforms
45 - Could lead to lots of overhead if there's a lot of programs
46 We could update all the uniforms when the program changes
47 - Could end up updating lots of uniforms which don't need updating
49 Updating uniforms should be cheap, so the overhead of updating up-to-date
50 uniforms should be minimal. It's also less complex.
52 Things which _may_ cause a different program to be used:
53 - Change in brush/pen style
54 - Change in painter opacity
55 - Change in composition mode
57 Whenever we set a mode on the shader manager - it needs to tell us if it had
58 to switch to a different program.
60 The shader manager should only switch when we tell it to. E.g. if we set a new
61 brush style and then switch to transparent painter, we only want it to compile
62 and use the correct program when we really need it.
65 // #define QT_OPENGL_CACHE_AS_VBOS
67 #include "qopenglgradientcache_p.h"
68 #include "qopengltexturecache_p.h"
69 #include "qopenglpaintengine_p.h"
71 #include <string.h> //for memcpy
74 #include <private/qopengl_p.h>
75 #include <private/qopenglcontext_p.h>
76 #include <private/qopenglextensions_p.h>
77 #include <private/qmath_p.h>
78 #include <private/qpaintengineex_p.h>
79 #include <QPaintEngine>
80 #include <private/qpainter_p.h>
81 #include <private/qfontengine_p.h>
82 #include <private/qdatabuffer_p.h>
83 #include <private/qstatictext_p.h>
84 #include <private/qtriangulator_p.h>
86 #include "qopenglengineshadermanager_p.h"
87 #include "qopengl2pexvertexarray_p.h"
88 #include "qopengltriangulatingstroker_p.h"
89 #include "qopengltextureglyphcache_p.h"
96 extern Q_GUI_EXPORT bool qt_cleartype_enabled;
100 extern bool qt_applefontsmoothing_enabled;
103 Q_GUI_EXPORT QImage qt_imageForBrush(int brushStyle, bool invert);
105 ////////////////////////////////// Private Methods //////////////////////////////////////////
107 QOpenGL2PaintEngineExPrivate::~QOpenGL2PaintEngineExPrivate()
109 delete shaderManager;
111 while (pathCaches.size()) {
112 QVectorPath::CacheEntry *e = *(pathCaches.constBegin());
113 e->cleanup(e->engine, e->data);
118 if (elementIndicesVBOId != 0) {
119 funcs.glDeleteBuffers(1, &elementIndicesVBOId);
120 elementIndicesVBOId = 0;
124 void QOpenGL2PaintEngineExPrivate::updateTextureFilter(GLenum target, GLenum wrapMode, bool smoothPixmapTransform, GLuint id)
126 // funcs.glActiveTexture(GL_TEXTURE0 + QT_BRUSH_TEXTURE_UNIT); //### Is it always this texture unit?
127 if (id != GLuint(-1) && id == lastTextureUsed)
130 lastTextureUsed = id;
132 if (smoothPixmapTransform) {
133 glTexParameterf(target, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
134 glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
136 glTexParameterf(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
137 glTexParameterf(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
139 glTexParameterf(target, GL_TEXTURE_WRAP_S, wrapMode);
140 glTexParameterf(target, GL_TEXTURE_WRAP_T, wrapMode);
144 inline QColor qt_premultiplyColor(QColor c, GLfloat opacity)
146 qreal alpha = c.alphaF() * opacity;
148 c.setRedF(c.redF() * alpha);
149 c.setGreenF(c.greenF() * alpha);
150 c.setBlueF(c.blueF() * alpha);
155 void QOpenGL2PaintEngineExPrivate::setBrush(const QBrush& brush)
157 if (qbrush_fast_equals(currentBrush, brush))
160 const Qt::BrushStyle newStyle = qbrush_style(brush);
161 Q_ASSERT(newStyle != Qt::NoBrush);
163 currentBrush = brush;
164 if (!currentBrushPixmap.isNull())
165 currentBrushPixmap = QPixmap();
166 brushUniformsDirty = true; // All brushes have at least one uniform
168 if (newStyle > Qt::SolidPattern)
169 brushTextureDirty = true;
171 if (currentBrush.style() == Qt::TexturePattern
172 && qHasPixmapTexture(brush) && brush.texture().isQBitmap())
174 shaderManager->setSrcPixelType(QOpenGLEngineShaderManager::TextureSrcWithPattern);
176 shaderManager->setSrcPixelType(newStyle);
178 shaderManager->optimiseForBrushTransform(currentBrush.transform().type());
182 void QOpenGL2PaintEngineExPrivate::useSimpleShader()
184 shaderManager->useSimpleProgram();
190 void QOpenGL2PaintEngineExPrivate::updateBrushTexture()
192 Q_Q(QOpenGL2PaintEngineEx);
193 // qDebug("QOpenGL2PaintEngineExPrivate::updateBrushTexture()");
194 Qt::BrushStyle style = currentBrush.style();
196 if ( (style >= Qt::Dense1Pattern) && (style <= Qt::DiagCrossPattern) ) {
197 // Get the image data for the pattern
198 QImage texImage = qt_imageForBrush(style, false);
200 funcs.glActiveTexture(GL_TEXTURE0 + QT_BRUSH_TEXTURE_UNIT);
201 QOpenGLTextureCache::cacheForContext(ctx)->bindTexture(ctx, texImage);
202 updateTextureFilter(GL_TEXTURE_2D, GL_REPEAT, q->state()->renderHints & QPainter::SmoothPixmapTransform);
204 else if (style >= Qt::LinearGradientPattern && style <= Qt::ConicalGradientPattern) {
205 // Gradiant brush: All the gradiants use the same texture
207 const QGradient* g = currentBrush.gradient();
209 // We apply global opacity in the fragment shaders, so we always pass 1.0
210 // for opacity to the cache.
211 GLuint texId = QOpenGL2GradientCache::cacheForContext(ctx)->getBuffer(*g, 1.0);
213 funcs.glActiveTexture(GL_TEXTURE0 + QT_BRUSH_TEXTURE_UNIT);
214 glBindTexture(GL_TEXTURE_2D, texId);
216 if (g->spread() == QGradient::RepeatSpread || g->type() == QGradient::ConicalGradient)
217 updateTextureFilter(GL_TEXTURE_2D, GL_REPEAT, q->state()->renderHints & QPainter::SmoothPixmapTransform);
218 else if (g->spread() == QGradient::ReflectSpread)
219 updateTextureFilter(GL_TEXTURE_2D, GL_MIRRORED_REPEAT, q->state()->renderHints & QPainter::SmoothPixmapTransform);
221 updateTextureFilter(GL_TEXTURE_2D, GL_CLAMP_TO_EDGE, q->state()->renderHints & QPainter::SmoothPixmapTransform);
223 else if (style == Qt::TexturePattern) {
224 currentBrushPixmap = currentBrush.texture();
226 int max_texture_size = ctx->d_func()->maxTextureSize();
227 if (currentBrushPixmap.width() > max_texture_size || currentBrushPixmap.height() > max_texture_size)
228 currentBrushPixmap = currentBrushPixmap.scaled(max_texture_size, max_texture_size, Qt::KeepAspectRatio);
230 funcs.glActiveTexture(GL_TEXTURE0 + QT_BRUSH_TEXTURE_UNIT);
231 QOpenGLTextureCache::cacheForContext(ctx)->bindTexture(ctx, currentBrushPixmap);
232 updateTextureFilter(GL_TEXTURE_2D, GL_REPEAT, q->state()->renderHints & QPainter::SmoothPixmapTransform);
233 textureInvertedY = false;
235 brushTextureDirty = false;
239 void QOpenGL2PaintEngineExPrivate::updateBrushUniforms()
241 // qDebug("QOpenGL2PaintEngineExPrivate::updateBrushUniforms()");
242 Qt::BrushStyle style = currentBrush.style();
244 if (style == Qt::NoBrush)
247 QTransform brushQTransform = currentBrush.transform();
249 if (style == Qt::SolidPattern) {
250 QColor col = qt_premultiplyColor(currentBrush.color(), (GLfloat)q->state()->opacity);
251 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::FragmentColor), col);
254 // All other brushes have a transform and thus need the translation point:
255 QPointF translationPoint;
257 if (style <= Qt::DiagCrossPattern) {
258 QColor col = qt_premultiplyColor(currentBrush.color(), (GLfloat)q->state()->opacity);
260 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::PatternColor), col);
262 QVector2D halfViewportSize(width*0.5, height*0.5);
263 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::HalfViewportSize), halfViewportSize);
265 else if (style == Qt::LinearGradientPattern) {
266 const QLinearGradient *g = static_cast<const QLinearGradient *>(currentBrush.gradient());
268 QPointF realStart = g->start();
269 QPointF realFinal = g->finalStop();
270 translationPoint = realStart;
272 QPointF l = realFinal - realStart;
274 QVector3D linearData(
277 1.0f / (l.x() * l.x() + l.y() * l.y())
280 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::LinearData), linearData);
282 QVector2D halfViewportSize(width*0.5, height*0.5);
283 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::HalfViewportSize), halfViewportSize);
285 else if (style == Qt::ConicalGradientPattern) {
286 const QConicalGradient *g = static_cast<const QConicalGradient *>(currentBrush.gradient());
287 translationPoint = g->center();
289 GLfloat angle = -(g->angle() * 2 * Q_PI) / 360.0;
291 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::Angle), angle);
293 QVector2D halfViewportSize(width*0.5, height*0.5);
294 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::HalfViewportSize), halfViewportSize);
296 else if (style == Qt::RadialGradientPattern) {
297 const QRadialGradient *g = static_cast<const QRadialGradient *>(currentBrush.gradient());
298 QPointF realCenter = g->center();
299 QPointF realFocal = g->focalPoint();
300 qreal realRadius = g->centerRadius() - g->focalRadius();
301 translationPoint = realFocal;
303 QPointF fmp = realCenter - realFocal;
304 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::Fmp), fmp);
306 GLfloat fmp2_m_radius2 = -fmp.x() * fmp.x() - fmp.y() * fmp.y() + realRadius*realRadius;
307 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::Fmp2MRadius2), fmp2_m_radius2);
308 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::Inverse2Fmp2MRadius2),
309 GLfloat(1.0 / (2.0*fmp2_m_radius2)));
310 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::SqrFr),
311 GLfloat(g->focalRadius() * g->focalRadius()));
312 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::BRadius),
313 GLfloat(2 * (g->centerRadius() - g->focalRadius()) * g->focalRadius()),
315 g->centerRadius() - g->focalRadius());
317 QVector2D halfViewportSize(width*0.5, height*0.5);
318 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::HalfViewportSize), halfViewportSize);
320 else if (style == Qt::TexturePattern) {
321 const QPixmap& texPixmap = currentBrush.texture();
323 if (qHasPixmapTexture(currentBrush) && currentBrush.texture().isQBitmap()) {
324 QColor col = qt_premultiplyColor(currentBrush.color(), (GLfloat)q->state()->opacity);
325 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::PatternColor), col);
328 QSizeF invertedTextureSize(1.0 / texPixmap.width(), 1.0 / texPixmap.height());
329 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::InvertedTextureSize), invertedTextureSize);
331 QVector2D halfViewportSize(width*0.5, height*0.5);
332 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::HalfViewportSize), halfViewportSize);
335 qWarning("QOpenGL2PaintEngineEx: Unimplemented fill style");
337 const QPointF &brushOrigin = q->state()->brushOrigin;
338 QTransform matrix = q->state()->matrix;
339 matrix.translate(brushOrigin.x(), brushOrigin.y());
341 QTransform translate(1, 0, 0, 1, -translationPoint.x(), -translationPoint.y());
344 if (device->paintFlipped()) {
348 QTransform gl_to_qt(1, 0, 0, m22, 0, dy);
349 QTransform inv_matrix;
350 if (style == Qt::TexturePattern && textureInvertedY == -1)
351 inv_matrix = gl_to_qt * (QTransform(1, 0, 0, -1, 0, currentBrush.texture().height()) * brushQTransform * matrix).inverted() * translate;
353 inv_matrix = gl_to_qt * (brushQTransform * matrix).inverted() * translate;
355 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::BrushTransform), inv_matrix);
356 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::BrushTexture), QT_BRUSH_TEXTURE_UNIT);
358 brushUniformsDirty = false;
362 // This assumes the shader manager has already setup the correct shader program
363 void QOpenGL2PaintEngineExPrivate::updateMatrix()
365 // qDebug("QOpenGL2PaintEngineExPrivate::updateMatrix()");
367 const QTransform& transform = q->state()->matrix;
369 // The projection matrix converts from Qt's coordinate system to GL's coordinate system
370 // * GL's viewport is 2x2, Qt's is width x height
371 // * GL has +y -> -y going from bottom -> top, Qt is the other way round
372 // * GL has [0,0] in the center, Qt has it in the top-left
374 // This results in the Projection matrix below, which is multiplied by the painter's
375 // transformation matrix, as shown below:
377 // Projection Matrix Painter Transform
378 // ------------------------------------------------ ------------------------
379 // | 2.0 / width | 0.0 | -1.0 | | m11 | m21 | dx |
380 // | 0.0 | -2.0 / height | 1.0 | * | m12 | m22 | dy |
381 // | 0.0 | 0.0 | 1.0 | | m13 | m23 | m33 |
382 // ------------------------------------------------ ------------------------
384 // NOTE: The resultant matrix is also transposed, as GL expects column-major matracies
386 const GLfloat wfactor = 2.0f / width;
387 GLfloat hfactor = -2.0f / height;
389 GLfloat dx = transform.dx();
390 GLfloat dy = transform.dy();
392 if (device->paintFlipped()) {
397 // Non-integer translates can have strange effects for some rendering operations such as
398 // anti-aliased text rendering. In such cases, we snap the translate to the pixel grid.
399 if (snapToPixelGrid && transform.type() == QTransform::TxTranslate) {
400 // 0.50 needs to rounded down to 0.0 for consistency with raster engine:
401 dx = ceilf(dx - 0.5f);
402 dy = ceilf(dy - 0.5f);
404 pmvMatrix[0][0] = (wfactor * transform.m11()) - transform.m13();
405 pmvMatrix[1][0] = (wfactor * transform.m21()) - transform.m23();
406 pmvMatrix[2][0] = (wfactor * dx) - transform.m33();
407 pmvMatrix[0][1] = (hfactor * transform.m12()) + transform.m13();
408 pmvMatrix[1][1] = (hfactor * transform.m22()) + transform.m23();
409 pmvMatrix[2][1] = (hfactor * dy) + transform.m33();
410 pmvMatrix[0][2] = transform.m13();
411 pmvMatrix[1][2] = transform.m23();
412 pmvMatrix[2][2] = transform.m33();
414 // 1/10000 == 0.0001, so we have good enough res to cover curves
415 // that span the entire widget...
416 inverseScale = qMax(1 / qMax( qMax(qAbs(transform.m11()), qAbs(transform.m22())),
417 qMax(qAbs(transform.m12()), qAbs(transform.m21())) ),
421 matrixUniformDirty = true;
423 // Set the PMV matrix attribute. As we use an attributes rather than uniforms, we only
424 // need to do this once for every matrix change and persists across all shader programs.
425 funcs.glVertexAttrib3fv(QT_PMV_MATRIX_1_ATTR, pmvMatrix[0]);
426 funcs.glVertexAttrib3fv(QT_PMV_MATRIX_2_ATTR, pmvMatrix[1]);
427 funcs.glVertexAttrib3fv(QT_PMV_MATRIX_3_ATTR, pmvMatrix[2]);
429 dasher.setInvScale(inverseScale);
430 stroker.setInvScale(inverseScale);
434 void QOpenGL2PaintEngineExPrivate::updateCompositionMode()
436 // NOTE: The entire paint engine works on pre-multiplied data - which is why some of these
437 // composition modes look odd.
438 // qDebug() << "QOpenGL2PaintEngineExPrivate::updateCompositionMode() - Setting GL composition mode for " << q->state()->composition_mode;
439 switch(q->state()->composition_mode) {
440 case QPainter::CompositionMode_SourceOver:
441 glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
443 case QPainter::CompositionMode_DestinationOver:
444 glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_ONE);
446 case QPainter::CompositionMode_Clear:
447 glBlendFunc(GL_ZERO, GL_ZERO);
449 case QPainter::CompositionMode_Source:
450 glBlendFunc(GL_ONE, GL_ZERO);
452 case QPainter::CompositionMode_Destination:
453 glBlendFunc(GL_ZERO, GL_ONE);
455 case QPainter::CompositionMode_SourceIn:
456 glBlendFunc(GL_DST_ALPHA, GL_ZERO);
458 case QPainter::CompositionMode_DestinationIn:
459 glBlendFunc(GL_ZERO, GL_SRC_ALPHA);
461 case QPainter::CompositionMode_SourceOut:
462 glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_ZERO);
464 case QPainter::CompositionMode_DestinationOut:
465 glBlendFunc(GL_ZERO, GL_ONE_MINUS_SRC_ALPHA);
467 case QPainter::CompositionMode_SourceAtop:
468 glBlendFunc(GL_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
470 case QPainter::CompositionMode_DestinationAtop:
471 glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_SRC_ALPHA);
473 case QPainter::CompositionMode_Xor:
474 glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
476 case QPainter::CompositionMode_Plus:
477 glBlendFunc(GL_ONE, GL_ONE);
480 qWarning("Unsupported composition mode");
484 compositionModeDirty = false;
487 static inline void setCoords(GLfloat *coords, const QOpenGLRect &rect)
489 coords[0] = rect.left;
490 coords[1] = rect.top;
491 coords[2] = rect.right;
492 coords[3] = rect.top;
493 coords[4] = rect.right;
494 coords[5] = rect.bottom;
495 coords[6] = rect.left;
496 coords[7] = rect.bottom;
499 void QOpenGL2PaintEngineExPrivate::drawTexture(const QOpenGLRect& dest, const QOpenGLRect& src, const QSize &textureSize, bool opaque, bool pattern)
501 // Setup for texture drawing
502 currentBrush = noBrush;
503 shaderManager->setSrcPixelType(pattern ? QOpenGLEngineShaderManager::PatternSrc : QOpenGLEngineShaderManager::ImageSrc);
505 if (snapToPixelGrid) {
506 snapToPixelGrid = false;
510 if (prepareForDraw(opaque))
511 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::ImageTexture), QT_IMAGE_TEXTURE_UNIT);
514 QColor col = qt_premultiplyColor(q->state()->pen.color(), (GLfloat)q->state()->opacity);
515 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::PatternColor), col);
518 GLfloat dx = 1.0 / textureSize.width();
519 GLfloat dy = 1.0 / textureSize.height();
521 QOpenGLRect srcTextureRect(src.left*dx, src.top*dy, src.right*dx, src.bottom*dy);
523 setCoords(staticVertexCoordinateArray, dest);
524 setCoords(staticTextureCoordinateArray, srcTextureRect);
526 glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
529 void QOpenGL2PaintEngineEx::beginNativePainting()
531 Q_D(QOpenGL2PaintEngineEx);
533 d->transferMode(BrushDrawingMode);
535 d->nativePaintingActive = true;
537 d->funcs.glUseProgram(0);
539 // Disable all the vertex attribute arrays:
540 for (int i = 0; i < QT_GL_VERTEX_ARRAY_TRACKED_COUNT; ++i)
541 d->funcs.glDisableVertexAttribArray(i);
543 #ifndef QT_OPENGL_ES_2
544 Q_ASSERT(QOpenGLContext::currentContext());
545 const QSurfaceFormat &fmt = d->device->context()->format();
546 if (fmt.majorVersion() < 3 || (fmt.majorVersion() == 3 && fmt.minorVersion() < 1)
547 || fmt.profile() == QSurfaceFormat::CompatibilityProfile)
549 // be nice to people who mix OpenGL 1.x code with QPainter commands
550 // by setting modelview and projection matrices to mirror the GL 1
552 const QTransform& mtx = state()->matrix;
554 float mv_matrix[4][4] =
556 { float(mtx.m11()), float(mtx.m12()), 0, float(mtx.m13()) },
557 { float(mtx.m21()), float(mtx.m22()), 0, float(mtx.m23()) },
559 { float(mtx.dx()), float(mtx.dy()), 0, float(mtx.m33()) }
562 const QSize sz = d->device->size();
564 glMatrixMode(GL_PROJECTION);
566 glOrtho(0, sz.width(), sz.height(), 0, -999999, 999999);
568 glMatrixMode(GL_MODELVIEW);
569 glLoadMatrixf(&mv_matrix[0][0]);
573 d->lastTextureUsed = GLuint(-1);
574 d->dirtyStencilRegion = QRect(0, 0, d->width, d->height);
577 d->shaderManager->setDirty();
582 void QOpenGL2PaintEngineExPrivate::resetGLState()
585 funcs.glActiveTexture(GL_TEXTURE0);
586 glDisable(GL_STENCIL_TEST);
587 glDisable(GL_DEPTH_TEST);
588 glDisable(GL_SCISSOR_TEST);
590 glDepthFunc(GL_LESS);
591 funcs.glClearDepthf(1);
593 glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
594 glStencilFunc(GL_ALWAYS, 0, 0xff);
595 setVertexAttribArrayEnabled(QT_TEXTURE_COORDS_ATTR, false);
596 setVertexAttribArrayEnabled(QT_VERTEX_COORDS_ATTR, false);
597 setVertexAttribArrayEnabled(QT_OPACITY_ATTR, false);
598 #ifndef QT_OPENGL_ES_2
599 // gl_Color, corresponding to vertex attribute 3, may have been changed
600 float color[] = { 1.0f, 1.0f, 1.0f, 1.0f };
601 funcs.glVertexAttrib4fv(3, color);
605 void QOpenGL2PaintEngineEx::endNativePainting()
607 Q_D(QOpenGL2PaintEngineEx);
609 d->nativePaintingActive = false;
612 void QOpenGL2PaintEngineEx::invalidateState()
614 Q_D(QOpenGL2PaintEngineEx);
618 bool QOpenGL2PaintEngineEx::isNativePaintingActive() const {
619 Q_D(const QOpenGL2PaintEngineEx);
620 return d->nativePaintingActive;
623 void QOpenGL2PaintEngineExPrivate::transferMode(EngineMode newMode)
628 if (mode == TextDrawingMode || mode == ImageDrawingMode || mode == ImageArrayDrawingMode) {
629 lastTextureUsed = GLuint(-1);
632 if (newMode == TextDrawingMode) {
633 shaderManager->setHasComplexGeometry(true);
635 shaderManager->setHasComplexGeometry(false);
638 if (newMode == ImageDrawingMode) {
639 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, staticVertexCoordinateArray);
640 setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, staticTextureCoordinateArray);
643 if (newMode == ImageArrayDrawingMode) {
644 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, (GLfloat*)vertexCoordinateArray.data());
645 setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, (GLfloat*)textureCoordinateArray.data());
646 setVertexAttributePointer(QT_OPACITY_ATTR, (GLfloat*)opacityArray.data());
649 // This needs to change when we implement high-quality anti-aliasing...
650 if (newMode != TextDrawingMode)
651 shaderManager->setMaskType(QOpenGLEngineShaderManager::NoMask);
656 struct QOpenGL2PEVectorPathCache
658 #ifdef QT_OPENGL_CACHE_AS_VBOS
667 GLenum primitiveType;
669 QVertexIndexVector::Type indexType;
672 void QOpenGL2PaintEngineExPrivate::cleanupVectorPath(QPaintEngineEx *engine, void *data)
674 QOpenGL2PEVectorPathCache *c = (QOpenGL2PEVectorPathCache *) data;
675 #ifdef QT_OPENGL_CACHE_AS_VBOS
676 Q_ASSERT(engine->type() == QPaintEngine::OpenGL2);
677 static_cast<QOpenGL2PaintEngineEx *>(engine)->d_func()->unusedVBOSToClean << c->vbo;
679 d->unusedIBOSToClean << c->ibo;
688 // Assumes everything is configured for the brush you want to use
689 void QOpenGL2PaintEngineExPrivate::fill(const QVectorPath& path)
691 transferMode(BrushDrawingMode);
693 if (snapToPixelGrid) {
694 snapToPixelGrid = false;
698 // Might need to call updateMatrix to re-calculate inverseScale
702 const QPointF* const points = reinterpret_cast<const QPointF*>(path.points());
704 // Check to see if there's any hints
705 if (path.shape() == QVectorPath::RectangleHint) {
706 QOpenGLRect rect(points[0].x(), points[0].y(), points[2].x(), points[2].y());
707 prepareForDraw(currentBrush.isOpaque());
709 } else if (path.isConvex()) {
711 if (path.isCacheable()) {
712 QVectorPath::CacheEntry *data = path.lookupCacheData(q);
713 QOpenGL2PEVectorPathCache *cache;
715 bool updateCache = false;
718 cache = (QOpenGL2PEVectorPathCache *) data->data;
719 // Check if scale factor is exceeded for curved paths and generate curves if so...
720 if (path.isCurved()) {
721 qreal scaleFactor = cache->iscale / inverseScale;
722 if (scaleFactor < 0.5 || scaleFactor > 2.0) {
723 #ifdef QT_OPENGL_CACHE_AS_VBOS
724 glDeleteBuffers(1, &cache->vbo);
726 Q_ASSERT(cache->ibo == 0);
728 qFree(cache->vertices);
729 Q_ASSERT(cache->indices == 0);
735 cache = new QOpenGL2PEVectorPathCache;
736 data = const_cast<QVectorPath &>(path).addCacheData(q, cache, cleanupVectorPath);
740 // Flatten the path at the current scale factor and fill it into the cache struct.
742 vertexCoordinateArray.clear();
743 vertexCoordinateArray.addPath(path, inverseScale, false);
744 int vertexCount = vertexCoordinateArray.vertexCount();
745 int floatSizeInBytes = vertexCount * 2 * sizeof(float);
746 cache->vertexCount = vertexCount;
747 cache->indexCount = 0;
748 cache->primitiveType = GL_TRIANGLE_FAN;
749 cache->iscale = inverseScale;
750 #ifdef QT_OPENGL_CACHE_AS_VBOS
751 glGenBuffers(1, &cache->vbo);
752 glBindBuffer(GL_ARRAY_BUFFER, cache->vbo);
753 glBufferData(GL_ARRAY_BUFFER, floatSizeInBytes, vertexCoordinateArray.data(), GL_STATIC_DRAW);
756 cache->vertices = (float *) qMalloc(floatSizeInBytes);
757 memcpy(cache->vertices, vertexCoordinateArray.data(), floatSizeInBytes);
762 prepareForDraw(currentBrush.isOpaque());
763 #ifdef QT_OPENGL_CACHE_AS_VBOS
764 glBindBuffer(GL_ARRAY_BUFFER, cache->vbo);
765 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, 0);
767 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, cache->vertices);
769 glDrawArrays(cache->primitiveType, 0, cache->vertexCount);
772 // printf(" - Marking path as cachable...\n");
773 // Tag it for later so that if the same path is drawn twice, it is assumed to be static and thus cachable
774 path.makeCacheable();
775 vertexCoordinateArray.clear();
776 vertexCoordinateArray.addPath(path, inverseScale, false);
777 prepareForDraw(currentBrush.isOpaque());
778 drawVertexArrays(vertexCoordinateArray, GL_TRIANGLE_FAN);
782 bool useCache = path.isCacheable();
784 QRectF bbox = path.controlPointRect();
785 // If the path doesn't fit within these limits, it is possible that the triangulation will fail.
786 useCache &= (bbox.left() > -0x8000 * inverseScale)
787 && (bbox.right() < 0x8000 * inverseScale)
788 && (bbox.top() > -0x8000 * inverseScale)
789 && (bbox.bottom() < 0x8000 * inverseScale);
793 QVectorPath::CacheEntry *data = path.lookupCacheData(q);
794 QOpenGL2PEVectorPathCache *cache;
796 bool updateCache = false;
799 cache = (QOpenGL2PEVectorPathCache *) data->data;
800 // Check if scale factor is exceeded for curved paths and generate curves if so...
801 if (path.isCurved()) {
802 qreal scaleFactor = cache->iscale / inverseScale;
803 if (scaleFactor < 0.5 || scaleFactor > 2.0) {
804 #ifdef QT_OPENGL_CACHE_AS_VBOS
805 glDeleteBuffers(1, &cache->vbo);
806 glDeleteBuffers(1, &cache->ibo);
808 qFree(cache->vertices);
809 qFree(cache->indices);
815 cache = new QOpenGL2PEVectorPathCache;
816 data = const_cast<QVectorPath &>(path).addCacheData(q, cache, cleanupVectorPath);
820 // Flatten the path at the current scale factor and fill it into the cache struct.
822 QTriangleSet polys = qTriangulate(path, QTransform().scale(1 / inverseScale, 1 / inverseScale));
823 cache->vertexCount = polys.vertices.size() / 2;
824 cache->indexCount = polys.indices.size();
825 cache->primitiveType = GL_TRIANGLES;
826 cache->iscale = inverseScale;
827 cache->indexType = polys.indices.type();
828 #ifdef QT_OPENGL_CACHE_AS_VBOS
829 glGenBuffers(1, &cache->vbo);
830 glGenBuffers(1, &cache->ibo);
831 glBindBuffer(GL_ARRAY_BUFFER, cache->vbo);
832 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, cache->ibo);
834 if (polys.indices.type() == QVertexIndexVector::UnsignedInt)
835 funcs.glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(quint32) * polys.indices.size(), polys.indices.data(), GL_STATIC_DRAW);
837 funcs.glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(quint16) * polys.indices.size(), polys.indices.data(), GL_STATIC_DRAW);
839 QVarLengthArray<float> vertices(polys.vertices.size());
840 for (int i = 0; i < polys.vertices.size(); ++i)
841 vertices[i] = float(inverseScale * polys.vertices.at(i));
842 funcs.glBufferData(GL_ARRAY_BUFFER, sizeof(float) * vertices.size(), vertices.data(), GL_STATIC_DRAW);
844 cache->vertices = (float *) qMalloc(sizeof(float) * polys.vertices.size());
845 if (polys.indices.type() == QVertexIndexVector::UnsignedInt) {
846 cache->indices = (quint32 *) qMalloc(sizeof(quint32) * polys.indices.size());
847 memcpy(cache->indices, polys.indices.data(), sizeof(quint32) * polys.indices.size());
849 cache->indices = (quint16 *) qMalloc(sizeof(quint16) * polys.indices.size());
850 memcpy(cache->indices, polys.indices.data(), sizeof(quint16) * polys.indices.size());
852 for (int i = 0; i < polys.vertices.size(); ++i)
853 cache->vertices[i] = float(inverseScale * polys.vertices.at(i));
857 prepareForDraw(currentBrush.isOpaque());
858 #ifdef QT_OPENGL_CACHE_AS_VBOS
859 glBindBuffer(GL_ARRAY_BUFFER, cache->vbo);
860 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, cache->ibo);
861 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, 0);
862 if (cache->indexType == QVertexIndexVector::UnsignedInt)
863 glDrawElements(cache->primitiveType, cache->indexCount, GL_UNSIGNED_INT, 0);
865 glDrawElements(cache->primitiveType, cache->indexCount, GL_UNSIGNED_SHORT, 0);
866 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
867 glBindBuffer(GL_ARRAY_BUFFER, 0);
869 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, cache->vertices);
870 if (cache->indexType == QVertexIndexVector::UnsignedInt)
871 glDrawElements(cache->primitiveType, cache->indexCount, GL_UNSIGNED_INT, (qint32 *)cache->indices);
873 glDrawElements(cache->primitiveType, cache->indexCount, GL_UNSIGNED_SHORT, (qint16 *)cache->indices);
877 // printf(" - Marking path as cachable...\n");
878 // Tag it for later so that if the same path is drawn twice, it is assumed to be static and thus cachable
879 path.makeCacheable();
881 if (device->context()->format().stencilBufferSize() == 0) {
882 // If there is no stencil buffer, triangulate the path instead.
884 QRectF bbox = path.controlPointRect();
885 // If the path doesn't fit within these limits, it is possible that the triangulation will fail.
886 bool withinLimits = (bbox.left() > -0x8000 * inverseScale)
887 && (bbox.right() < 0x8000 * inverseScale)
888 && (bbox.top() > -0x8000 * inverseScale)
889 && (bbox.bottom() < 0x8000 * inverseScale);
891 QTriangleSet polys = qTriangulate(path, QTransform().scale(1 / inverseScale, 1 / inverseScale));
893 QVarLengthArray<float> vertices(polys.vertices.size());
894 for (int i = 0; i < polys.vertices.size(); ++i)
895 vertices[i] = float(inverseScale * polys.vertices.at(i));
897 prepareForDraw(currentBrush.isOpaque());
898 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, vertices.constData());
899 if (funcs.hasOpenGLExtension(QOpenGLExtensions::ElementIndexUint))
900 glDrawElements(GL_TRIANGLES, polys.indices.size(), GL_UNSIGNED_INT, polys.indices.data());
902 glDrawElements(GL_TRIANGLES, polys.indices.size(), GL_UNSIGNED_SHORT, polys.indices.data());
904 // We can't handle big, concave painter paths with OpenGL without stencil buffer.
905 qWarning("Painter path exceeds +/-32767 pixels.");
910 // The path is too complicated & needs the stencil technique
911 vertexCoordinateArray.clear();
912 vertexCoordinateArray.addPath(path, inverseScale, false);
914 fillStencilWithVertexArray(vertexCoordinateArray, path.hasWindingFill());
917 glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
919 if (q->state()->clipTestEnabled) {
920 // Pass when high bit is set, replace stencil value with current clip
921 glStencilFunc(GL_NOTEQUAL, q->state()->currentClip, GL_STENCIL_HIGH_BIT);
922 } else if (path.hasWindingFill()) {
923 // Pass when any bit is set, replace stencil value with 0
924 glStencilFunc(GL_NOTEQUAL, 0, 0xff);
926 // Pass when high bit is set, replace stencil value with 0
927 glStencilFunc(GL_NOTEQUAL, 0, GL_STENCIL_HIGH_BIT);
929 prepareForDraw(currentBrush.isOpaque());
931 // Stencil the brush onto the dest buffer
932 composite(vertexCoordinateArray.boundingRect());
934 updateClipScissorTest();
940 void QOpenGL2PaintEngineExPrivate::fillStencilWithVertexArray(const float *data,
944 const QOpenGLRect &bounds,
945 StencilFillMode mode)
947 Q_ASSERT(count || stops);
949 // qDebug("QOpenGL2PaintEngineExPrivate::fillStencilWithVertexArray()");
950 glStencilMask(0xff); // Enable stencil writes
952 if (dirtyStencilRegion.intersects(currentScissorBounds)) {
953 QVector<QRect> clearRegion = dirtyStencilRegion.intersected(currentScissorBounds).rects();
954 glClearStencil(0); // Clear to zero
955 for (int i = 0; i < clearRegion.size(); ++i) {
956 #ifndef QT_GL_NO_SCISSOR_TEST
957 setScissor(clearRegion.at(i));
959 glClear(GL_STENCIL_BUFFER_BIT);
962 dirtyStencilRegion -= currentScissorBounds;
964 #ifndef QT_GL_NO_SCISSOR_TEST
965 updateClipScissorTest();
969 glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); // Disable color writes
971 glEnable(GL_STENCIL_TEST); // For some reason, this has to happen _after_ the simple shader is use()'d
973 if (mode == WindingFillMode) {
974 Q_ASSERT(stops && !count);
975 if (q->state()->clipTestEnabled) {
976 // Flatten clip values higher than current clip, and set high bit to match current clip
977 glStencilFunc(GL_LEQUAL, GL_STENCIL_HIGH_BIT | q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
978 glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
981 glStencilFunc(GL_EQUAL, GL_STENCIL_HIGH_BIT, GL_STENCIL_HIGH_BIT);
982 } else if (!stencilClean) {
983 // Clear stencil buffer within bounding rect
984 glStencilFunc(GL_ALWAYS, 0, 0xff);
985 glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO);
989 // Inc. for front-facing triangle
990 funcs.glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_INCR_WRAP, GL_INCR_WRAP);
991 // Dec. for back-facing "holes"
992 funcs.glStencilOpSeparate(GL_BACK, GL_KEEP, GL_DECR_WRAP, GL_DECR_WRAP);
993 glStencilMask(~GL_STENCIL_HIGH_BIT);
994 drawVertexArrays(data, stops, stopCount, GL_TRIANGLE_FAN);
996 if (q->state()->clipTestEnabled) {
997 // Clear high bit of stencil outside of path
998 glStencilFunc(GL_EQUAL, q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
999 glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
1000 glStencilMask(GL_STENCIL_HIGH_BIT);
1003 } else if (mode == OddEvenFillMode) {
1004 glStencilMask(GL_STENCIL_HIGH_BIT);
1005 glStencilOp(GL_KEEP, GL_KEEP, GL_INVERT); // Simply invert the stencil bit
1006 drawVertexArrays(data, stops, stopCount, GL_TRIANGLE_FAN);
1008 } else { // TriStripStrokeFillMode
1009 Q_ASSERT(count && !stops); // tristrips generated directly, so no vertexArray or stops
1010 glStencilMask(GL_STENCIL_HIGH_BIT);
1012 glStencilOp(GL_KEEP, GL_KEEP, GL_INVERT); // Simply invert the stencil bit
1013 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, data);
1014 glDrawArrays(GL_TRIANGLE_STRIP, 0, count);
1017 glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
1018 if (q->state()->clipTestEnabled) {
1019 glStencilFunc(GL_LEQUAL, q->state()->currentClip | GL_STENCIL_HIGH_BIT,
1020 ~GL_STENCIL_HIGH_BIT);
1022 glStencilFunc(GL_ALWAYS, GL_STENCIL_HIGH_BIT, 0xff);
1024 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, data);
1025 glDrawArrays(GL_TRIANGLE_STRIP, 0, count);
1029 // Enable color writes & disable stencil writes
1030 glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
1034 If the maximum value in the stencil buffer is GL_STENCIL_HIGH_BIT - 1,
1035 restore the stencil buffer to a pristine state. The current clip region
1036 is set to 1, and the rest to 0.
1038 void QOpenGL2PaintEngineExPrivate::resetClipIfNeeded()
1040 if (maxClip != (GL_STENCIL_HIGH_BIT - 1))
1043 Q_Q(QOpenGL2PaintEngineEx);
1046 glEnable(GL_STENCIL_TEST);
1047 glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
1049 QRectF bounds = q->state()->matrix.inverted().mapRect(QRectF(0, 0, width, height));
1050 QOpenGLRect rect(bounds.left(), bounds.top(), bounds.right(), bounds.bottom());
1052 // Set high bit on clip region
1053 glStencilFunc(GL_LEQUAL, q->state()->currentClip, 0xff);
1054 glStencilOp(GL_KEEP, GL_INVERT, GL_INVERT);
1055 glStencilMask(GL_STENCIL_HIGH_BIT);
1058 // Reset clipping to 1 and everything else to zero
1059 glStencilFunc(GL_NOTEQUAL, 0x01, GL_STENCIL_HIGH_BIT);
1060 glStencilOp(GL_ZERO, GL_REPLACE, GL_REPLACE);
1061 glStencilMask(0xff);
1064 q->state()->currentClip = 1;
1065 q->state()->canRestoreClip = false;
1070 glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
1073 bool QOpenGL2PaintEngineExPrivate::prepareForDraw(bool srcPixelsAreOpaque)
1075 if (brushTextureDirty && mode != ImageDrawingMode && mode != ImageArrayDrawingMode)
1076 updateBrushTexture();
1078 if (compositionModeDirty)
1079 updateCompositionMode();
1084 const bool stateHasOpacity = q->state()->opacity < 0.99f;
1085 if (q->state()->composition_mode == QPainter::CompositionMode_Source
1086 || (q->state()->composition_mode == QPainter::CompositionMode_SourceOver
1087 && srcPixelsAreOpaque && !stateHasOpacity))
1089 glDisable(GL_BLEND);
1094 QOpenGLEngineShaderManager::OpacityMode opacityMode;
1095 if (mode == ImageArrayDrawingMode) {
1096 opacityMode = QOpenGLEngineShaderManager::AttributeOpacity;
1098 opacityMode = stateHasOpacity ? QOpenGLEngineShaderManager::UniformOpacity
1099 : QOpenGLEngineShaderManager::NoOpacity;
1100 if (stateHasOpacity && (mode != ImageDrawingMode)) {
1102 bool brushIsPattern = (currentBrush.style() >= Qt::Dense1Pattern) &&
1103 (currentBrush.style() <= Qt::DiagCrossPattern);
1105 if ((currentBrush.style() == Qt::SolidPattern) || brushIsPattern)
1106 opacityMode = QOpenGLEngineShaderManager::NoOpacity; // Global opacity handled by srcPixel shader
1109 shaderManager->setOpacityMode(opacityMode);
1111 bool changed = shaderManager->useCorrectShaderProg();
1112 // If the shader program needs changing, we change it and mark all uniforms as dirty
1114 // The shader program has changed so mark all uniforms as dirty:
1115 brushUniformsDirty = true;
1116 opacityUniformDirty = true;
1117 matrixUniformDirty = true;
1120 if (brushUniformsDirty && mode != ImageDrawingMode && mode != ImageArrayDrawingMode)
1121 updateBrushUniforms();
1123 if (opacityMode == QOpenGLEngineShaderManager::UniformOpacity && opacityUniformDirty) {
1124 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::GlobalOpacity), (GLfloat)q->state()->opacity);
1125 opacityUniformDirty = false;
1128 if (matrixUniformDirty && shaderManager->hasComplexGeometry()) {
1129 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::Matrix),
1131 matrixUniformDirty = false;
1137 void QOpenGL2PaintEngineExPrivate::composite(const QOpenGLRect& boundingRect)
1139 setCoords(staticVertexCoordinateArray, boundingRect);
1140 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, staticVertexCoordinateArray);
1141 glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
1144 // Draws the vertex array as a set of <vertexArrayStops.size()> triangle fans.
1145 void QOpenGL2PaintEngineExPrivate::drawVertexArrays(const float *data, int *stops, int stopCount,
1148 // Now setup the pointer to the vertex array:
1149 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, (GLfloat*)data);
1151 int previousStop = 0;
1152 for (int i=0; i<stopCount; ++i) {
1153 int stop = stops[i];
1155 qDebug("Drawing triangle fan for vertecies %d -> %d:", previousStop, stop-1);
1156 for (int i=previousStop; i<stop; ++i)
1157 qDebug(" %02d: [%.2f, %.2f]", i, vertexArray.data()[i].x, vertexArray.data()[i].y);
1159 glDrawArrays(primitive, previousStop, stop - previousStop);
1160 previousStop = stop;
1164 /////////////////////////////////// Public Methods //////////////////////////////////////////
1166 QOpenGL2PaintEngineEx::QOpenGL2PaintEngineEx()
1167 : QPaintEngineEx(*(new QOpenGL2PaintEngineExPrivate(this)))
1171 QOpenGL2PaintEngineEx::~QOpenGL2PaintEngineEx()
1175 void QOpenGL2PaintEngineEx::fill(const QVectorPath &path, const QBrush &brush)
1177 Q_D(QOpenGL2PaintEngineEx);
1179 if (qbrush_style(brush) == Qt::NoBrush)
1186 Q_GUI_EXPORT bool qt_scaleForTransform(const QTransform &transform, qreal *scale); // qtransform.cpp
1189 void QOpenGL2PaintEngineEx::stroke(const QVectorPath &path, const QPen &pen)
1191 Q_D(QOpenGL2PaintEngineEx);
1193 const QBrush &penBrush = qpen_brush(pen);
1194 if (qpen_style(pen) == Qt::NoPen || qbrush_style(penBrush) == Qt::NoBrush)
1197 QOpenGL2PaintEngineState *s = state();
1198 if (pen.isCosmetic() && !qt_scaleForTransform(s->transform(), 0)) {
1199 // QTriangulatingStroker class is not meant to support cosmetically sheared strokes.
1200 QPaintEngineEx::stroke(path, pen);
1205 d->setBrush(penBrush);
1206 d->stroke(path, pen);
1209 void QOpenGL2PaintEngineExPrivate::stroke(const QVectorPath &path, const QPen &pen)
1211 const QOpenGL2PaintEngineState *s = q->state();
1212 if (snapToPixelGrid) {
1213 snapToPixelGrid = false;
1217 const Qt::PenStyle penStyle = qpen_style(pen);
1218 const QBrush &penBrush = qpen_brush(pen);
1219 const bool opaque = penBrush.isOpaque() && s->opacity > 0.99;
1221 transferMode(BrushDrawingMode);
1223 // updateMatrix() is responsible for setting the inverse scale on
1224 // the strokers, so we need to call it here and not wait for
1225 // prepareForDraw() down below.
1228 QRectF clip = q->state()->matrix.inverted().mapRect(q->state()->clipEnabled
1229 ? q->state()->rectangleClip
1230 : QRectF(0, 0, width, height));
1232 if (penStyle == Qt::SolidLine) {
1233 stroker.process(path, pen, clip);
1235 } else { // Some sort of dash
1236 dasher.process(path, pen, clip);
1238 QVectorPath dashStroke(dasher.points(),
1239 dasher.elementCount(),
1240 dasher.elementTypes());
1241 stroker.process(dashStroke, pen, clip);
1244 if (!stroker.vertexCount())
1248 prepareForDraw(opaque);
1249 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, stroker.vertices());
1250 glDrawArrays(GL_TRIANGLE_STRIP, 0, stroker.vertexCount() / 2);
1252 // QBrush b(Qt::green);
1254 // d->prepareForDraw(true);
1255 // glDrawArrays(GL_LINE_STRIP, 0, d->stroker.vertexCount() / 2);
1258 qreal width = qpen_widthf(pen) / 2;
1261 qreal extra = pen.joinStyle() == Qt::MiterJoin
1262 ? qMax(pen.miterLimit() * width, width)
1265 if (pen.isCosmetic())
1266 extra = extra * inverseScale;
1268 QRectF bounds = path.controlPointRect().adjusted(-extra, -extra, extra, extra);
1270 fillStencilWithVertexArray(stroker.vertices(), stroker.vertexCount() / 2,
1271 0, 0, bounds, QOpenGL2PaintEngineExPrivate::TriStripStrokeFillMode);
1273 glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
1275 // Pass when any bit is set, replace stencil value with 0
1276 glStencilFunc(GL_NOTEQUAL, 0, GL_STENCIL_HIGH_BIT);
1277 prepareForDraw(false);
1279 // Stencil the brush onto the dest buffer
1284 updateClipScissorTest();
1288 void QOpenGL2PaintEngineEx::penChanged() { }
1289 void QOpenGL2PaintEngineEx::brushChanged() { }
1290 void QOpenGL2PaintEngineEx::brushOriginChanged() { }
1292 void QOpenGL2PaintEngineEx::opacityChanged()
1294 // qDebug("QOpenGL2PaintEngineEx::opacityChanged()");
1295 Q_D(QOpenGL2PaintEngineEx);
1296 state()->opacityChanged = true;
1298 Q_ASSERT(d->shaderManager);
1299 d->brushUniformsDirty = true;
1300 d->opacityUniformDirty = true;
1303 void QOpenGL2PaintEngineEx::compositionModeChanged()
1305 // qDebug("QOpenGL2PaintEngineEx::compositionModeChanged()");
1306 Q_D(QOpenGL2PaintEngineEx);
1307 state()->compositionModeChanged = true;
1308 d->compositionModeDirty = true;
1311 void QOpenGL2PaintEngineEx::renderHintsChanged()
1313 state()->renderHintsChanged = true;
1315 #if !defined(QT_OPENGL_ES_2)
1316 if ((state()->renderHints & QPainter::Antialiasing)
1317 || (state()->renderHints & QPainter::HighQualityAntialiasing))
1318 glEnable(GL_MULTISAMPLE);
1320 glDisable(GL_MULTISAMPLE);
1323 Q_D(QOpenGL2PaintEngineEx);
1324 d->lastTextureUsed = GLuint(-1);
1325 d->brushTextureDirty = true;
1326 // qDebug("QOpenGL2PaintEngineEx::renderHintsChanged() not implemented!");
1329 void QOpenGL2PaintEngineEx::transformChanged()
1331 Q_D(QOpenGL2PaintEngineEx);
1332 d->matrixDirty = true;
1333 state()->matrixChanged = true;
1337 static const QRectF scaleRect(const QRectF &r, qreal sx, qreal sy)
1339 return QRectF(r.x() * sx, r.y() * sy, r.width() * sx, r.height() * sy);
1342 void QOpenGL2PaintEngineEx::drawPixmap(const QRectF& dest, const QPixmap & pixmap, const QRectF & src)
1344 Q_D(QOpenGL2PaintEngineEx);
1345 QOpenGLContext *ctx = d->ctx;
1347 int max_texture_size = ctx->d_func()->maxTextureSize();
1348 if (pixmap.width() > max_texture_size || pixmap.height() > max_texture_size) {
1349 QPixmap scaled = pixmap.scaled(max_texture_size, max_texture_size, Qt::KeepAspectRatio);
1351 const qreal sx = scaled.width() / qreal(pixmap.width());
1352 const qreal sy = scaled.height() / qreal(pixmap.height());
1354 drawPixmap(dest, scaled, scaleRect(src, sx, sy));
1359 d->transferMode(ImageDrawingMode);
1361 d->funcs.glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);
1362 GLuint id = QOpenGLTextureCache::cacheForContext(ctx)->bindTexture(ctx, pixmap);
1364 QOpenGLRect srcRect(src.left(), src.top(), src.right(), src.bottom());
1366 bool isBitmap = pixmap.isQBitmap();
1367 bool isOpaque = !isBitmap && !pixmap.hasAlpha();
1369 d->updateTextureFilter(GL_TEXTURE_2D, GL_CLAMP_TO_EDGE,
1370 state()->renderHints & QPainter::SmoothPixmapTransform, id);
1371 d->drawTexture(dest, srcRect, pixmap.size(), isOpaque, isBitmap);
1374 void QOpenGL2PaintEngineEx::drawImage(const QRectF& dest, const QImage& image, const QRectF& src,
1375 Qt::ImageConversionFlags)
1377 Q_D(QOpenGL2PaintEngineEx);
1378 QOpenGLContext *ctx = d->ctx;
1380 int max_texture_size = ctx->d_func()->maxTextureSize();
1381 if (image.width() > max_texture_size || image.height() > max_texture_size) {
1382 QImage scaled = image.scaled(max_texture_size, max_texture_size, Qt::KeepAspectRatio);
1384 const qreal sx = scaled.width() / qreal(image.width());
1385 const qreal sy = scaled.height() / qreal(image.height());
1387 drawImage(dest, scaled, scaleRect(src, sx, sy));
1392 d->transferMode(ImageDrawingMode);
1394 d->funcs.glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);
1396 GLuint id = QOpenGLTextureCache::cacheForContext(ctx)->bindTexture(ctx, image);
1398 d->updateTextureFilter(GL_TEXTURE_2D, GL_CLAMP_TO_EDGE,
1399 state()->renderHints & QPainter::SmoothPixmapTransform, id);
1400 d->drawTexture(dest, src, image.size(), !image.hasAlphaChannel());
1403 void QOpenGL2PaintEngineEx::drawStaticTextItem(QStaticTextItem *textItem)
1405 Q_D(QOpenGL2PaintEngineEx);
1409 QPainterState *s = state();
1410 float det = s->matrix.determinant();
1412 // don't try to cache huge fonts or vastly transformed fonts
1413 QFontEngine *fontEngine = textItem->fontEngine();
1414 const qreal pixelSize = fontEngine->fontDef.pixelSize;
1415 if (shouldDrawCachedGlyphs(pixelSize, s->matrix) || det < 0.25f || det > 4.f) {
1416 QFontEngineGlyphCache::Type glyphType = fontEngine->glyphFormat >= 0
1417 ? QFontEngineGlyphCache::Type(textItem->fontEngine()->glyphFormat)
1418 : d->glyphCacheType;
1419 if (glyphType == QFontEngineGlyphCache::Raster_RGBMask) {
1420 if (d->device->context()->format().alphaBufferSize() > 0 || s->matrix.type() > QTransform::TxTranslate
1421 || (s->composition_mode != QPainter::CompositionMode_Source
1422 && s->composition_mode != QPainter::CompositionMode_SourceOver))
1424 glyphType = QFontEngineGlyphCache::Raster_A8;
1428 d->drawCachedGlyphs(glyphType, textItem);
1430 QPaintEngineEx::drawStaticTextItem(textItem);
1434 bool QOpenGL2PaintEngineEx::drawTexture(const QRectF &dest, GLuint textureId, const QSize &size, const QRectF &src)
1436 Q_D(QOpenGL2PaintEngineEx);
1437 if (!d->shaderManager)
1441 d->transferMode(ImageDrawingMode);
1443 d->funcs.glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);
1444 glBindTexture(GL_TEXTURE_2D, textureId);
1446 QOpenGLRect srcRect(src.left(), src.bottom(), src.right(), src.top());
1448 d->updateTextureFilter(GL_TEXTURE_2D, GL_CLAMP_TO_EDGE,
1449 state()->renderHints & QPainter::SmoothPixmapTransform, textureId);
1450 d->drawTexture(dest, srcRect, size, false);
1454 void QOpenGL2PaintEngineEx::drawTextItem(const QPointF &p, const QTextItem &textItem)
1456 Q_D(QOpenGL2PaintEngineEx);
1459 QOpenGL2PaintEngineState *s = state();
1461 const QTextItemInt &ti = static_cast<const QTextItemInt &>(textItem);
1463 QTransform::TransformationType txtype = s->matrix.type();
1465 float det = s->matrix.determinant();
1466 bool drawCached = txtype < QTransform::TxProject;
1468 // don't try to cache huge fonts or vastly transformed fonts
1469 const qreal pixelSize = ti.fontEngine->fontDef.pixelSize;
1470 if (shouldDrawCachedGlyphs(pixelSize, s->matrix) || det < 0.25f || det > 4.f)
1473 QFontEngineGlyphCache::Type glyphType = ti.fontEngine->glyphFormat >= 0
1474 ? QFontEngineGlyphCache::Type(ti.fontEngine->glyphFormat)
1475 : d->glyphCacheType;
1478 if (glyphType == QFontEngineGlyphCache::Raster_RGBMask) {
1479 if (d->device->context()->format().alphaBufferSize() > 0 || txtype > QTransform::TxTranslate
1480 || (state()->composition_mode != QPainter::CompositionMode_Source
1481 && state()->composition_mode != QPainter::CompositionMode_SourceOver))
1483 glyphType = QFontEngineGlyphCache::Raster_A8;
1488 QVarLengthArray<QFixedPoint> positions;
1489 QVarLengthArray<glyph_t> glyphs;
1490 QTransform matrix = QTransform::fromTranslate(p.x(), p.y());
1491 ti.fontEngine->getGlyphPositions(ti.glyphs, matrix, ti.flags, glyphs, positions);
1494 QStaticTextItem staticTextItem;
1495 staticTextItem.chars = const_cast<QChar *>(ti.chars);
1496 staticTextItem.setFontEngine(ti.fontEngine);
1497 staticTextItem.glyphs = glyphs.data();
1498 staticTextItem.numChars = ti.num_chars;
1499 staticTextItem.numGlyphs = glyphs.size();
1500 staticTextItem.glyphPositions = positions.data();
1502 d->drawCachedGlyphs(glyphType, &staticTextItem);
1507 QPaintEngineEx::drawTextItem(p, ti);
1512 class QOpenGLStaticTextUserData: public QStaticTextUserData
1515 QOpenGLStaticTextUserData()
1516 : QStaticTextUserData(OpenGLUserData), cacheSize(0, 0), cacheSerialNumber(0)
1520 ~QOpenGLStaticTextUserData()
1525 QOpenGL2PEXVertexArray vertexCoordinateArray;
1526 QOpenGL2PEXVertexArray textureCoordinateArray;
1527 QFontEngineGlyphCache::Type glyphType;
1528 int cacheSerialNumber;
1533 #if defined(Q_WS_WIN)
1534 static bool fontSmoothingApproximately(qreal target)
1536 extern Q_GUI_EXPORT qreal qt_fontsmoothing_gamma; // qapplication_win.cpp
1537 return (qAbs(qt_fontsmoothing_gamma - target) < 0.2);
1541 // #define QT_OPENGL_DRAWCACHEDGLYPHS_INDEX_ARRAY_VBO
1543 void QOpenGL2PaintEngineExPrivate::drawCachedGlyphs(QFontEngineGlyphCache::Type glyphType,
1544 QStaticTextItem *staticTextItem)
1546 Q_Q(QOpenGL2PaintEngineEx);
1548 QOpenGL2PaintEngineState *s = q->state();
1550 void *cacheKey = ctx->shareGroup();
1551 bool recreateVertexArrays = false;
1553 QOpenGLTextureGlyphCache *cache =
1554 (QOpenGLTextureGlyphCache *) staticTextItem->fontEngine()->glyphCache(cacheKey, glyphType, QTransform());
1555 if (!cache || cache->cacheType() != glyphType || cache->contextGroup() == 0) {
1556 cache = new QOpenGLTextureGlyphCache(glyphType, QTransform());
1557 staticTextItem->fontEngine()->setGlyphCache(cacheKey, cache);
1558 recreateVertexArrays = true;
1561 if (staticTextItem->userDataNeedsUpdate) {
1562 recreateVertexArrays = true;
1563 } else if (staticTextItem->userData() == 0) {
1564 recreateVertexArrays = true;
1565 } else if (staticTextItem->userData()->type != QStaticTextUserData::OpenGLUserData) {
1566 recreateVertexArrays = true;
1568 QOpenGLStaticTextUserData *userData = static_cast<QOpenGLStaticTextUserData *>(staticTextItem->userData());
1569 if (userData->glyphType != glyphType) {
1570 recreateVertexArrays = true;
1571 } else if (userData->cacheSerialNumber != cache->serialNumber()) {
1572 recreateVertexArrays = true;
1576 // We only need to update the cache with new glyphs if we are actually going to recreate the vertex arrays.
1577 // If the cache size has changed, we do need to regenerate the vertices, but we don't need to repopulate the
1578 // cache so this text is performed before we test if the cache size has changed.
1579 if (recreateVertexArrays) {
1580 cache->setPaintEnginePrivate(this);
1581 if (!cache->populate(staticTextItem->fontEngine(), staticTextItem->numGlyphs,
1582 staticTextItem->glyphs, staticTextItem->glyphPositions)) {
1583 // No space for glyphs in cache. We need to reset it and try again.
1585 cache->populate(staticTextItem->fontEngine(), staticTextItem->numGlyphs,
1586 staticTextItem->glyphs, staticTextItem->glyphPositions);
1588 cache->fillInPendingGlyphs();
1591 if (cache->width() == 0 || cache->height() == 0)
1594 transferMode(TextDrawingMode);
1596 int margin = cache->glyphMargin();
1598 GLfloat dx = 1.0 / cache->width();
1599 GLfloat dy = 1.0 / cache->height();
1601 // Use global arrays by default
1602 QOpenGL2PEXVertexArray *vertexCoordinates = &vertexCoordinateArray;
1603 QOpenGL2PEXVertexArray *textureCoordinates = &textureCoordinateArray;
1605 if (staticTextItem->useBackendOptimizations) {
1606 QOpenGLStaticTextUserData *userData = 0;
1608 if (staticTextItem->userData() == 0
1609 || staticTextItem->userData()->type != QStaticTextUserData::OpenGLUserData) {
1611 userData = new QOpenGLStaticTextUserData();
1612 staticTextItem->setUserData(userData);
1615 userData = static_cast<QOpenGLStaticTextUserData*>(staticTextItem->userData());
1618 userData->glyphType = glyphType;
1619 userData->cacheSerialNumber = cache->serialNumber();
1621 // Use cache if backend optimizations is turned on
1622 vertexCoordinates = &userData->vertexCoordinateArray;
1623 textureCoordinates = &userData->textureCoordinateArray;
1625 QSize size(cache->width(), cache->height());
1626 if (userData->cacheSize != size) {
1627 recreateVertexArrays = true;
1628 userData->cacheSize = size;
1632 if (recreateVertexArrays) {
1633 vertexCoordinates->clear();
1634 textureCoordinates->clear();
1636 bool supportsSubPixelPositions = staticTextItem->fontEngine()->supportsSubPixelPositions();
1637 for (int i=0; i<staticTextItem->numGlyphs; ++i) {
1638 QFixed subPixelPosition;
1639 if (supportsSubPixelPositions)
1640 subPixelPosition = cache->subPixelPositionForX(staticTextItem->glyphPositions[i].x);
1642 QTextureGlyphCache::GlyphAndSubPixelPosition glyph(staticTextItem->glyphs[i], subPixelPosition);
1644 const QTextureGlyphCache::Coord &c = cache->coords[glyph];
1648 int x = qFloor(staticTextItem->glyphPositions[i].x) + c.baseLineX - margin;
1649 int y = qFloor(staticTextItem->glyphPositions[i].y) - c.baseLineY - margin;
1651 vertexCoordinates->addQuad(QRectF(x, y, c.w, c.h));
1652 textureCoordinates->addQuad(QRectF(c.x*dx, c.y*dy, c.w * dx, c.h * dy));
1655 staticTextItem->userDataNeedsUpdate = false;
1658 int numGlyphs = vertexCoordinates->vertexCount() / 4;
1662 if (elementIndices.size() < numGlyphs*6) {
1663 Q_ASSERT(elementIndices.size() % 6 == 0);
1664 int j = elementIndices.size() / 6 * 4;
1665 while (j < numGlyphs*4) {
1666 elementIndices.append(j + 0);
1667 elementIndices.append(j + 0);
1668 elementIndices.append(j + 1);
1669 elementIndices.append(j + 2);
1670 elementIndices.append(j + 3);
1671 elementIndices.append(j + 3);
1676 #if defined(QT_OPENGL_DRAWCACHEDGLYPHS_INDEX_ARRAY_VBO)
1677 if (elementIndicesVBOId == 0)
1678 glGenBuffers(1, &elementIndicesVBOId);
1680 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elementIndicesVBOId);
1681 glBufferData(GL_ELEMENT_ARRAY_BUFFER, elementIndices.size() * sizeof(GLushort),
1682 elementIndices.constData(), GL_STATIC_DRAW);
1685 #if defined(QT_OPENGL_DRAWCACHEDGLYPHS_INDEX_ARRAY_VBO)
1686 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, elementIndicesVBOId);
1690 setVertexAttributePointer(QT_VERTEX_COORDS_ATTR, (GLfloat*)vertexCoordinates->data());
1691 setVertexAttributePointer(QT_TEXTURE_COORDS_ATTR, (GLfloat*)textureCoordinates->data());
1693 if (!snapToPixelGrid) {
1694 snapToPixelGrid = true;
1698 QBrush pensBrush = q->state()->pen.brush();
1699 setBrush(pensBrush);
1701 if (glyphType == QFontEngineGlyphCache::Raster_RGBMask) {
1703 // Subpixel antialiasing without gamma correction
1705 QPainter::CompositionMode compMode = q->state()->composition_mode;
1706 Q_ASSERT(compMode == QPainter::CompositionMode_Source
1707 || compMode == QPainter::CompositionMode_SourceOver);
1709 shaderManager->setMaskType(QOpenGLEngineShaderManager::SubPixelMaskPass1);
1711 if (pensBrush.style() == Qt::SolidPattern) {
1712 // Solid patterns can get away with only one pass.
1713 QColor c = pensBrush.color();
1714 qreal oldOpacity = q->state()->opacity;
1715 if (compMode == QPainter::CompositionMode_Source) {
1716 c = qt_premultiplyColor(c, q->state()->opacity);
1717 q->state()->opacity = 1;
1718 opacityUniformDirty = true;
1721 compositionModeDirty = false; // I can handle this myself, thank you very much
1722 prepareForDraw(false); // Text always causes src pixels to be transparent
1724 // prepareForDraw() have set the opacity on the current shader, so the opacity state can now be reset.
1725 if (compMode == QPainter::CompositionMode_Source) {
1726 q->state()->opacity = oldOpacity;
1727 opacityUniformDirty = true;
1731 glBlendFunc(GL_CONSTANT_COLOR, GL_ONE_MINUS_SRC_COLOR);
1732 funcs.glBlendColor(c.redF(), c.greenF(), c.blueF(), c.alphaF());
1734 // Other brush styles need two passes.
1736 qreal oldOpacity = q->state()->opacity;
1737 if (compMode == QPainter::CompositionMode_Source) {
1738 q->state()->opacity = 1;
1739 opacityUniformDirty = true;
1740 pensBrush = Qt::white;
1741 setBrush(pensBrush);
1744 compositionModeDirty = false; // I can handle this myself, thank you very much
1745 prepareForDraw(false); // Text always causes src pixels to be transparent
1747 glBlendFunc(GL_ZERO, GL_ONE_MINUS_SRC_COLOR);
1749 funcs.glActiveTexture(GL_TEXTURE0 + QT_MASK_TEXTURE_UNIT);
1750 glBindTexture(GL_TEXTURE_2D, cache->texture());
1751 updateTextureFilter(GL_TEXTURE_2D, GL_REPEAT, false);
1753 #if defined(QT_OPENGL_DRAWCACHEDGLYPHS_INDEX_ARRAY_VBO)
1754 glDrawElements(GL_TRIANGLE_STRIP, 6 * numGlyphs, GL_UNSIGNED_SHORT, 0);
1756 glDrawElements(GL_TRIANGLE_STRIP, 6 * numGlyphs, GL_UNSIGNED_SHORT, elementIndices.data());
1759 shaderManager->setMaskType(QOpenGLEngineShaderManager::SubPixelMaskPass2);
1761 if (compMode == QPainter::CompositionMode_Source) {
1762 q->state()->opacity = oldOpacity;
1763 opacityUniformDirty = true;
1764 pensBrush = q->state()->pen.brush();
1765 setBrush(pensBrush);
1768 compositionModeDirty = false;
1769 prepareForDraw(false); // Text always causes src pixels to be transparent
1771 glBlendFunc(GL_ONE, GL_ONE);
1773 compositionModeDirty = true;
1775 // Greyscale/mono glyphs
1777 shaderManager->setMaskType(QOpenGLEngineShaderManager::PixelMask);
1778 prepareForDraw(false); // Text always causes src pixels to be transparent
1781 QOpenGLTextureGlyphCache::FilterMode filterMode = (s->matrix.type() > QTransform::TxTranslate)?QOpenGLTextureGlyphCache::Linear:QOpenGLTextureGlyphCache::Nearest;
1782 if (lastMaskTextureUsed != cache->texture() || cache->filterMode() != filterMode) {
1784 funcs.glActiveTexture(GL_TEXTURE0 + QT_MASK_TEXTURE_UNIT);
1785 if (lastMaskTextureUsed != cache->texture()) {
1786 glBindTexture(GL_TEXTURE_2D, cache->texture());
1787 lastMaskTextureUsed = cache->texture();
1790 if (cache->filterMode() != filterMode) {
1791 if (filterMode == QOpenGLTextureGlyphCache::Linear) {
1792 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
1793 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1795 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
1796 glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
1798 cache->setFilterMode(filterMode);
1802 bool srgbFrameBufferEnabled = false;
1803 if (funcs.hasOpenGLExtension(QOpenGLExtensions::SRGBFrameBuffer)) {
1804 #if defined(Q_WS_MAC)
1805 if (glyphType == QFontEngineGlyphCache::Raster_RGBMask)
1806 #elif defined(Q_WS_WIN)
1807 if (glyphType != QFontEngineGlyphCache::Raster_RGBMask || fontSmoothingApproximately(2.1))
1812 glEnable(GL_FRAMEBUFFER_SRGB);
1813 srgbFrameBufferEnabled = true;
1817 #if defined(QT_OPENGL_DRAWCACHEDGLYPHS_INDEX_ARRAY_VBO)
1818 glDrawElements(GL_TRIANGLE_STRIP, 6 * numGlyphs, GL_UNSIGNED_SHORT, 0);
1819 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
1821 glDrawElements(GL_TRIANGLE_STRIP, 6 * numGlyphs, GL_UNSIGNED_SHORT, elementIndices.data());
1824 if (srgbFrameBufferEnabled)
1825 glDisable(GL_FRAMEBUFFER_SRGB);
1829 void QOpenGL2PaintEngineEx::drawPixmapFragments(const QPainter::PixmapFragment *fragments, int fragmentCount, const QPixmap &pixmap,
1830 QPainter::PixmapFragmentHints hints)
1832 Q_D(QOpenGL2PaintEngineEx);
1833 // Use fallback for extended composition modes.
1834 if (state()->composition_mode > QPainter::CompositionMode_Plus) {
1835 QPaintEngineEx::drawPixmapFragments(fragments, fragmentCount, pixmap, hints);
1840 int max_texture_size = d->ctx->d_func()->maxTextureSize();
1841 if (pixmap.width() > max_texture_size || pixmap.height() > max_texture_size) {
1842 QPixmap scaled = pixmap.scaled(max_texture_size, max_texture_size, Qt::KeepAspectRatio);
1843 d->drawPixmapFragments(fragments, fragmentCount, scaled, hints);
1845 d->drawPixmapFragments(fragments, fragmentCount, pixmap, hints);
1850 void QOpenGL2PaintEngineExPrivate::drawPixmapFragments(const QPainter::PixmapFragment *fragments,
1851 int fragmentCount, const QPixmap &pixmap,
1852 QPainter::PixmapFragmentHints hints)
1854 GLfloat dx = 1.0f / pixmap.size().width();
1855 GLfloat dy = 1.0f / pixmap.size().height();
1857 vertexCoordinateArray.clear();
1858 textureCoordinateArray.clear();
1859 opacityArray.reset();
1861 if (snapToPixelGrid) {
1862 snapToPixelGrid = false;
1866 bool allOpaque = true;
1868 for (int i = 0; i < fragmentCount; ++i) {
1871 if (fragments[i].rotation != 0) {
1872 s = qFastSin(fragments[i].rotation * Q_PI / 180);
1873 c = qFastCos(fragments[i].rotation * Q_PI / 180);
1876 qreal right = 0.5 * fragments[i].scaleX * fragments[i].width;
1877 qreal bottom = 0.5 * fragments[i].scaleY * fragments[i].height;
1878 QOpenGLPoint bottomRight(right * c - bottom * s, right * s + bottom * c);
1879 QOpenGLPoint bottomLeft(-right * c - bottom * s, -right * s + bottom * c);
1881 vertexCoordinateArray.addVertex(bottomRight.x + fragments[i].x, bottomRight.y + fragments[i].y);
1882 vertexCoordinateArray.addVertex(-bottomLeft.x + fragments[i].x, -bottomLeft.y + fragments[i].y);
1883 vertexCoordinateArray.addVertex(-bottomRight.x + fragments[i].x, -bottomRight.y + fragments[i].y);
1884 vertexCoordinateArray.addVertex(-bottomRight.x + fragments[i].x, -bottomRight.y + fragments[i].y);
1885 vertexCoordinateArray.addVertex(bottomLeft.x + fragments[i].x, bottomLeft.y + fragments[i].y);
1886 vertexCoordinateArray.addVertex(bottomRight.x + fragments[i].x, bottomRight.y + fragments[i].y);
1888 QOpenGLRect src(fragments[i].sourceLeft * dx, fragments[i].sourceTop * dy,
1889 (fragments[i].sourceLeft + fragments[i].width) * dx,
1890 (fragments[i].sourceTop + fragments[i].height) * dy);
1892 textureCoordinateArray.addVertex(src.right, src.bottom);
1893 textureCoordinateArray.addVertex(src.right, src.top);
1894 textureCoordinateArray.addVertex(src.left, src.top);
1895 textureCoordinateArray.addVertex(src.left, src.top);
1896 textureCoordinateArray.addVertex(src.left, src.bottom);
1897 textureCoordinateArray.addVertex(src.right, src.bottom);
1899 qreal opacity = fragments[i].opacity * q->state()->opacity;
1900 opacityArray << opacity << opacity << opacity << opacity << opacity << opacity;
1901 allOpaque &= (opacity >= 0.99f);
1904 funcs.glActiveTexture(GL_TEXTURE0 + QT_IMAGE_TEXTURE_UNIT);
1905 GLuint id = QOpenGLTextureCache::cacheForContext(ctx)->bindTexture(ctx, pixmap);
1906 transferMode(ImageArrayDrawingMode);
1908 bool isBitmap = pixmap.isQBitmap();
1909 bool isOpaque = !isBitmap && (!pixmap.hasAlpha() || (hints & QPainter::OpaqueHint)) && allOpaque;
1911 updateTextureFilter(GL_TEXTURE_2D, GL_CLAMP_TO_EDGE,
1912 q->state()->renderHints & QPainter::SmoothPixmapTransform, id);
1914 // Setup for texture drawing
1915 currentBrush = noBrush;
1916 shaderManager->setSrcPixelType(isBitmap ? QOpenGLEngineShaderManager::PatternSrc
1917 : QOpenGLEngineShaderManager::ImageSrc);
1918 if (prepareForDraw(isOpaque))
1919 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::ImageTexture), QT_IMAGE_TEXTURE_UNIT);
1922 QColor col = qt_premultiplyColor(q->state()->pen.color(), (GLfloat)q->state()->opacity);
1923 shaderManager->currentProgram()->setUniformValue(location(QOpenGLEngineShaderManager::PatternColor), col);
1926 glDrawArrays(GL_TRIANGLES, 0, 6 * fragmentCount);
1929 bool QOpenGL2PaintEngineEx::begin(QPaintDevice *pdev)
1931 Q_D(QOpenGL2PaintEngineEx);
1933 Q_ASSERT(pdev->devType() == QInternal::OpenGL);
1934 d->device = static_cast<QOpenGLPaintDevice*>(pdev);
1939 if (d->device->context() != QOpenGLContext::currentContext()) {
1940 qWarning("QPainter::begin(): QOpenGLPaintDevice's context needs to be current");
1944 d->ctx = QOpenGLContext::currentContext();
1945 d->ctx->d_func()->active_engine = this;
1947 d->funcs.initializeGLFunctions();
1949 for (int i = 0; i < QT_GL_VERTEX_ARRAY_TRACKED_COUNT; ++i)
1950 d->vertexAttributeArraysEnabledState[i] = false;
1952 const QSize sz = d->device->size();
1953 d->width = sz.width();
1954 d->height = sz.height();
1955 d->mode = BrushDrawingMode;
1956 d->brushTextureDirty = true;
1957 d->brushUniformsDirty = true;
1958 d->matrixUniformDirty = true;
1959 d->matrixDirty = true;
1960 d->compositionModeDirty = true;
1961 d->opacityUniformDirty = true;
1962 d->needsSync = true;
1963 d->useSystemClip = !systemClip().isEmpty();
1964 d->currentBrush = QBrush();
1966 d->dirtyStencilRegion = QRect(0, 0, d->width, d->height);
1967 d->stencilClean = true;
1969 d->shaderManager = new QOpenGLEngineShaderManager(d->ctx);
1971 glDisable(GL_STENCIL_TEST);
1972 glDisable(GL_DEPTH_TEST);
1973 glDisable(GL_SCISSOR_TEST);
1975 #if !defined(QT_OPENGL_ES_2)
1976 glDisable(GL_MULTISAMPLE);
1979 d->glyphCacheType = QFontEngineGlyphCache::Raster_A8;
1981 #if !defined(QT_OPENGL_ES_2)
1982 #if defined(Q_WS_WIN)
1983 if (qt_cleartype_enabled
1984 && (fontSmoothingApproximately(1.0) || fontSmoothingApproximately(2.1)))
1986 #if defined(Q_WS_MAC)
1987 if (qt_applefontsmoothing_enabled)
1989 d->glyphCacheType = QFontEngineGlyphCache::Raster_RGBMask;
1992 #if defined(QT_OPENGL_ES_2)
1993 // OpenGL ES can't switch MSAA off, so if the gl paint device is
1994 // multisampled, it's always multisampled.
1995 d->multisamplingAlwaysEnabled = d->device->context()->format().samples() > 1;
1997 d->multisamplingAlwaysEnabled = false;
2003 bool QOpenGL2PaintEngineEx::end()
2005 Q_D(QOpenGL2PaintEngineEx);
2007 QOpenGLContext *ctx = d->ctx;
2008 d->funcs.glUseProgram(0);
2009 d->transferMode(BrushDrawingMode);
2011 ctx->d_func()->active_engine = 0;
2015 delete d->shaderManager;
2016 d->shaderManager = 0;
2017 d->currentBrush = QBrush();
2019 #ifdef QT_OPENGL_CACHE_AS_VBOS
2020 if (!d->unusedVBOSToClean.isEmpty()) {
2021 glDeleteBuffers(d->unusedVBOSToClean.size(), d->unusedVBOSToClean.constData());
2022 d->unusedVBOSToClean.clear();
2024 if (!d->unusedIBOSToClean.isEmpty()) {
2025 glDeleteBuffers(d->unusedIBOSToClean.size(), d->unusedIBOSToClean.constData());
2026 d->unusedIBOSToClean.clear();
2033 void QOpenGL2PaintEngineEx::ensureActive()
2035 Q_D(QOpenGL2PaintEngineEx);
2036 QOpenGLContext *ctx = d->ctx;
2038 if (isActive() && ctx->d_func()->active_engine != this) {
2039 ctx->d_func()->active_engine = this;
2040 d->needsSync = true;
2044 d->transferMode(BrushDrawingMode);
2045 glViewport(0, 0, d->width, d->height);
2046 d->needsSync = false;
2047 d->lastMaskTextureUsed = 0;
2048 d->shaderManager->setDirty();
2050 for (int i = 0; i < 3; ++i)
2051 d->vertexAttribPointers[i] = (GLfloat*)-1; // Assume the pointers are clobbered
2056 void QOpenGL2PaintEngineExPrivate::updateClipScissorTest()
2058 Q_Q(QOpenGL2PaintEngineEx);
2059 if (q->state()->clipTestEnabled) {
2060 glEnable(GL_STENCIL_TEST);
2061 glStencilFunc(GL_LEQUAL, q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
2063 glDisable(GL_STENCIL_TEST);
2064 glStencilFunc(GL_ALWAYS, 0, 0xff);
2067 #ifdef QT_GL_NO_SCISSOR_TEST
2068 currentScissorBounds = QRect(0, 0, width, height);
2070 QRect bounds = q->state()->rectangleClip;
2071 if (!q->state()->clipEnabled) {
2073 bounds = systemClip.boundingRect();
2075 bounds = QRect(0, 0, width, height);
2078 bounds = bounds.intersected(systemClip.boundingRect());
2080 bounds = bounds.intersected(QRect(0, 0, width, height));
2083 currentScissorBounds = bounds;
2085 if (bounds == QRect(0, 0, width, height)) {
2086 glDisable(GL_SCISSOR_TEST);
2088 glEnable(GL_SCISSOR_TEST);
2094 void QOpenGL2PaintEngineExPrivate::setScissor(const QRect &rect)
2096 const int left = rect.left();
2097 const int width = rect.width();
2098 int bottom = height - (rect.top() + rect.height());
2099 if (device->paintFlipped()) {
2100 bottom = rect.top();
2102 const int height = rect.height();
2104 glScissor(left, bottom, width, height);
2107 void QOpenGL2PaintEngineEx::clipEnabledChanged()
2109 Q_D(QOpenGL2PaintEngineEx);
2111 state()->clipChanged = true;
2113 if (painter()->hasClipping())
2114 d->regenerateClip();
2116 d->systemStateChanged();
2119 void QOpenGL2PaintEngineExPrivate::clearClip(uint value)
2121 dirtyStencilRegion -= currentScissorBounds;
2123 glStencilMask(0xff);
2124 glClearStencil(value);
2125 glClear(GL_STENCIL_BUFFER_BIT);
2128 q->state()->needsClipBufferClear = false;
2131 void QOpenGL2PaintEngineExPrivate::writeClip(const QVectorPath &path, uint value)
2133 transferMode(BrushDrawingMode);
2135 if (snapToPixelGrid) {
2136 snapToPixelGrid = false;
2143 stencilClean = false;
2145 const bool singlePass = !path.hasWindingFill()
2146 && (((q->state()->currentClip == maxClip - 1) && q->state()->clipTestEnabled)
2147 || q->state()->needsClipBufferClear);
2148 const uint referenceClipValue = q->state()->needsClipBufferClear ? 1 : q->state()->currentClip;
2150 if (q->state()->needsClipBufferClear)
2153 if (path.isEmpty()) {
2154 glEnable(GL_STENCIL_TEST);
2155 glStencilFunc(GL_LEQUAL, value, ~GL_STENCIL_HIGH_BIT);
2159 if (q->state()->clipTestEnabled)
2160 glStencilFunc(GL_LEQUAL, q->state()->currentClip, ~GL_STENCIL_HIGH_BIT);
2162 glStencilFunc(GL_ALWAYS, 0, 0xff);
2164 vertexCoordinateArray.clear();
2165 vertexCoordinateArray.addPath(path, inverseScale, false);
2168 fillStencilWithVertexArray(vertexCoordinateArray, path.hasWindingFill());
2170 glColorMask(false, false, false, false);
2171 glEnable(GL_STENCIL_TEST);
2175 // Under these conditions we can set the new stencil value in a single
2176 // pass, by using the current value and the "new value" as the toggles
2178 glStencilFunc(GL_LEQUAL, referenceClipValue, ~GL_STENCIL_HIGH_BIT);
2179 glStencilOp(GL_KEEP, GL_INVERT, GL_INVERT);
2180 glStencilMask(value ^ referenceClipValue);
2182 drawVertexArrays(vertexCoordinateArray, GL_TRIANGLE_FAN);
2184 glStencilOp(GL_KEEP, GL_REPLACE, GL_REPLACE);
2185 glStencilMask(0xff);
2187 if (!q->state()->clipTestEnabled && path.hasWindingFill()) {
2188 // Pass when any clip bit is set, set high bit
2189 glStencilFunc(GL_NOTEQUAL, GL_STENCIL_HIGH_BIT, ~GL_STENCIL_HIGH_BIT);
2190 composite(vertexCoordinateArray.boundingRect());
2193 // Pass when high bit is set, replace stencil value with new clip value
2194 glStencilFunc(GL_NOTEQUAL, value, GL_STENCIL_HIGH_BIT);
2196 composite(vertexCoordinateArray.boundingRect());
2199 glStencilFunc(GL_LEQUAL, value, ~GL_STENCIL_HIGH_BIT);
2202 glColorMask(true, true, true, true);
2205 void QOpenGL2PaintEngineEx::clip(const QVectorPath &path, Qt::ClipOperation op)
2207 // qDebug("QOpenGL2PaintEngineEx::clip()");
2208 Q_D(QOpenGL2PaintEngineEx);
2210 state()->clipChanged = true;
2214 if (op == Qt::ReplaceClip) {
2215 op = Qt::IntersectClip;
2216 if (d->hasClipOperations()) {
2217 d->systemStateChanged();
2218 state()->canRestoreClip = false;
2222 #ifndef QT_GL_NO_SCISSOR_TEST
2223 if (!path.isEmpty() && op == Qt::IntersectClip && (path.shape() == QVectorPath::RectangleHint)) {
2224 const QPointF* const points = reinterpret_cast<const QPointF*>(path.points());
2225 QRectF rect(points[0], points[2]);
2227 if (state()->matrix.type() <= QTransform::TxScale
2228 || (state()->matrix.type() == QTransform::TxRotate
2229 && qFuzzyIsNull(state()->matrix.m11())
2230 && qFuzzyIsNull(state()->matrix.m22())))
2232 state()->rectangleClip = state()->rectangleClip.intersected(state()->matrix.mapRect(rect).toRect());
2233 d->updateClipScissorTest();
2239 const QRect pathRect = state()->matrix.mapRect(path.controlPointRect()).toAlignedRect();
2243 if (d->useSystemClip) {
2244 state()->clipTestEnabled = true;
2245 state()->currentClip = 1;
2247 state()->clipTestEnabled = false;
2249 state()->rectangleClip = QRect(0, 0, d->width, d->height);
2250 state()->canRestoreClip = false;
2251 d->updateClipScissorTest();
2253 case Qt::IntersectClip:
2254 state()->rectangleClip = state()->rectangleClip.intersected(pathRect);
2255 d->updateClipScissorTest();
2256 d->resetClipIfNeeded();
2258 d->writeClip(path, d->maxClip);
2259 state()->currentClip = d->maxClip;
2260 state()->clipTestEnabled = true;
2267 void QOpenGL2PaintEngineExPrivate::regenerateClip()
2269 systemStateChanged();
2270 replayClipOperations();
2273 void QOpenGL2PaintEngineExPrivate::systemStateChanged()
2275 Q_Q(QOpenGL2PaintEngineEx);
2277 q->state()->clipChanged = true;
2279 if (systemClip.isEmpty()) {
2280 useSystemClip = false;
2282 if (q->paintDevice()->devType() == QInternal::Widget && currentClipDevice) {
2283 //QWidgetPrivate *widgetPrivate = qt_widget_private(static_cast<QWidget *>(currentClipDevice)->window());
2284 //useSystemClip = widgetPrivate->extra && widgetPrivate->extra->inRenderWithPainter;
2285 useSystemClip = true;
2287 useSystemClip = true;
2291 q->state()->clipTestEnabled = false;
2292 q->state()->needsClipBufferClear = true;
2294 q->state()->currentClip = 1;
2297 q->state()->rectangleClip = useSystemClip ? systemClip.boundingRect() : QRect(0, 0, width, height);
2298 updateClipScissorTest();
2300 if (systemClip.rectCount() == 1) {
2301 if (systemClip.boundingRect() == QRect(0, 0, width, height))
2302 useSystemClip = false;
2303 #ifndef QT_GL_NO_SCISSOR_TEST
2304 // scissoring takes care of the system clip
2309 if (useSystemClip) {
2313 path.addRegion(systemClip);
2315 q->state()->currentClip = 0;
2316 writeClip(qtVectorPathForPath(q->state()->matrix.inverted().map(path)), 1);
2317 q->state()->currentClip = 1;
2318 q->state()->clipTestEnabled = true;
2322 void QOpenGL2PaintEngineEx::setState(QPainterState *new_state)
2324 // qDebug("QOpenGL2PaintEngineEx::setState()");
2326 Q_D(QOpenGL2PaintEngineEx);
2328 QOpenGL2PaintEngineState *s = static_cast<QOpenGL2PaintEngineState *>(new_state);
2329 QOpenGL2PaintEngineState *old_state = state();
2331 QPaintEngineEx::setState(s);
2334 // Newly created state object. The call to setState()
2335 // will either be followed by a call to begin(), or we are
2336 // setting the state as part of a save().
2341 // Setting the state as part of a restore().
2343 if (old_state == s || old_state->renderHintsChanged)
2344 renderHintsChanged();
2346 if (old_state == s || old_state->matrixChanged)
2347 d->matrixDirty = true;
2349 if (old_state == s || old_state->compositionModeChanged)
2350 d->compositionModeDirty = true;
2352 if (old_state == s || old_state->opacityChanged)
2353 d->opacityUniformDirty = true;
2355 if (old_state == s || old_state->clipChanged) {
2356 if (old_state && old_state != s && old_state->canRestoreClip) {
2357 d->updateClipScissorTest();
2358 glDepthFunc(GL_LEQUAL);
2360 d->regenerateClip();
2365 QPainterState *QOpenGL2PaintEngineEx::createState(QPainterState *orig) const
2368 const_cast<QOpenGL2PaintEngineEx *>(this)->ensureActive();
2370 QOpenGL2PaintEngineState *s;
2372 s = new QOpenGL2PaintEngineState();
2374 s = new QOpenGL2PaintEngineState(*static_cast<QOpenGL2PaintEngineState *>(orig));
2376 s->matrixChanged = false;
2377 s->compositionModeChanged = false;
2378 s->opacityChanged = false;
2379 s->renderHintsChanged = false;
2380 s->clipChanged = false;
2385 QOpenGL2PaintEngineState::QOpenGL2PaintEngineState(QOpenGL2PaintEngineState &other)
2386 : QPainterState(other)
2389 needsClipBufferClear = other.needsClipBufferClear;
2390 clipTestEnabled = other.clipTestEnabled;
2391 currentClip = other.currentClip;
2392 canRestoreClip = other.canRestoreClip;
2393 rectangleClip = other.rectangleClip;
2396 QOpenGL2PaintEngineState::QOpenGL2PaintEngineState()
2399 needsClipBufferClear = true;
2400 clipTestEnabled = false;
2401 canRestoreClip = true;
2404 QOpenGL2PaintEngineState::~QOpenGL2PaintEngineState()
2408 void QOpenGL2PaintEngineExPrivate::setVertexAttribArrayEnabled(int arrayIndex, bool enabled)
2410 Q_ASSERT(arrayIndex < QT_GL_VERTEX_ARRAY_TRACKED_COUNT);
2412 if (vertexAttributeArraysEnabledState[arrayIndex] && !enabled)
2413 funcs.glDisableVertexAttribArray(arrayIndex);
2415 if (!vertexAttributeArraysEnabledState[arrayIndex] && enabled)
2416 funcs.glEnableVertexAttribArray(arrayIndex);
2418 vertexAttributeArraysEnabledState[arrayIndex] = enabled;
2421 void QOpenGL2PaintEngineExPrivate::syncGlState()
2423 for (int i = 0; i < QT_GL_VERTEX_ARRAY_TRACKED_COUNT; ++i) {
2424 if (vertexAttributeArraysEnabledState[i])
2425 funcs.glEnableVertexAttribArray(i);
2427 funcs.glDisableVertexAttribArray(i);