diff options
author | Samuel Rødal <sroedal@trolltech.com> | 2009-10-28 13:44:10 (GMT) |
---|---|---|
committer | Samuel Rødal <sroedal@trolltech.com> | 2009-10-29 09:47:14 (GMT) |
commit | 7d5b560f71e0f11c20b7ebef11f3095e760ca32c (patch) | |
tree | ac8397e1ff54344a5331da055c5707a90851ce68 /src/opengl/qglpixmapfilter.cpp | |
parent | f5c553078b7381c3dff7d0bd6b9990a7acf86abb (diff) | |
download | Qt-7d5b560f71e0f11c20b7ebef11f3095e760ca32c.zip Qt-7d5b560f71e0f11c20b7ebef11f3095e760ca32c.tar.gz Qt-7d5b560f71e0f11c20b7ebef11f3095e760ca32c.tar.bz2 |
Added some optimizations to the blur and drop shadow GL filters.
* Use ExpandToTransparentBorderPadMode since we can use GL_CLAMP_TO_EDGE
to clamp to the texture.
* Shrink the bounding rects reported by the blur
and drop shadow filters (expanding by 2 * radius isn't needed).
* Use a single-pass blur for radii <= 3 to avoid the overhead of
rendering to an FBO.
* Made the fast blur setting generate filters for only a predefined set
of radii, and then use the actual blur radius to spread the sample
points outwards.
* Optimized the generated program to rely less on temporary variables,
as those seemed to not be handled very well by certain GLSL compilers.
Reviewed-by: Gunnar Sletta
Diffstat (limited to 'src/opengl/qglpixmapfilter.cpp')
-rw-r--r-- | src/opengl/qglpixmapfilter.cpp | 436 |
1 files changed, 266 insertions, 170 deletions
diff --git a/src/opengl/qglpixmapfilter.cpp b/src/opengl/qglpixmapfilter.cpp index 656957d..e381a5d 100644 --- a/src/opengl/qglpixmapfilter.cpp +++ b/src/opengl/qglpixmapfilter.cpp @@ -104,7 +104,7 @@ public: void setUniforms(QGLShaderProgram *program); - static QByteArray generateGaussianShader(int radius, bool dropShadow = false); + static QByteArray generateGaussianShader(int radius, bool singlePass = false, bool dropShadow = false); protected: bool processGL(QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &srcRect) const; @@ -113,6 +113,7 @@ private: mutable QSize m_textureSize; mutable bool m_horizontalBlur; + mutable bool m_singlePass; mutable bool m_haveCached; mutable int m_cachedRadius; @@ -132,6 +133,7 @@ protected: private: mutable QSize m_textureSize; mutable bool m_horizontalBlur; + mutable bool m_singlePass; mutable bool m_haveCached; mutable int m_cachedRadius; @@ -298,123 +300,155 @@ bool QGLPixmapConvolutionFilter::processGL(QPainter *painter, const QPointF &pos return true; } -static const char *qt_gl_blur_filter_fast = - "const int samples = 9;" - "uniform mediump vec2 delta;" - "lowp vec4 customShader(lowp sampler2D src, highp vec2 srcCoords) {" - " mediump vec4 color = vec4(0.0, 0.0, 0.0, 0.0);" - " mediump float offset = (float(samples) - 1.0) / 2.0;" - " for (int i = 0; i < samples; i++) {" - " mediump vec2 coord = srcCoords + delta * (offset - float(i)) / offset;" - " color += texture2D(src, coord);" - " }" - " return color * (1.0 / float(samples));" - "}"; - -static const char *qt_gl_drop_shadow_filter_fast = - "const int samples = 9;" - "uniform mediump vec2 delta;" - "uniform mediump vec4 shadowColor;" - "lowp vec4 customShader(lowp sampler2D src, highp vec2 srcCoords) {" - " mediump vec4 color = vec4(0.0, 0.0, 0.0, 0.0);" - " mediump float offset = (float(samples) - 1.0) / 2.0;" - " for (int i = 0; i < samples; i++) {" - " mediump vec2 coord = srcCoords + delta * (offset - float(i)) / offset;" - " color += texture2D(src, coord).a * shadowColor;" - " }" - " return color * (1.0 / float(samples));" - "}"; +static const char *qt_gl_texture_sampling_helper = + "lowp float texture2DAlpha(lowp sampler2D src, highp vec2 srcCoords) {\n" + " return texture2D(src, srcCoords).a;\n" + "}\n"; + +static const char *qt_gl_clamped_texture_sampling_helper = + "highp vec4 texture_dimensions;\n" // x = width, y = height, z = 0.5/width, w = 0.5/height + "lowp float clampedTexture2DAlpha(lowp sampler2D src, highp vec2 srcCoords) {\n" + " highp vec2 clampedCoords = clamp(srcCoords, texture_dimensions.zw, vec2(1.0) - texture_dimensions.zw);\n" + " highp vec2 t = clamp(min(srcCoords, vec2(1.0) - srcCoords) * srcDim + 0.5, 0.0, 1.0);\n" + " return texture2D(src, clampedCoords).a * t.x * t.y;\n" + "}\n" + "lowp vec4 clampedTexture2D(lowp sampler2D src, highp vec2 srcCoords) {\n" + " highp vec2 clampedCoords = clamp(srcCoords, texture_dimensions.zw, vec2(1.0) - texture_dimensions.zw);\n" + " highp vec2 t = clamp(min(srcCoords, vec2(1.0) - srcCoords) * srcDim + 0.5, 0.0, 1.0);\n" + " return texture2D(src, clampedCoords) * t.x * t.y;\n" + "}\n"; + +static QByteArray qt_gl_convertToClamped(const QByteArray &source) +{ + QByteArray result; + result.append(qt_gl_clamped_texture_sampling_helper); + result.append(QByteArray(source).replace("texture2DAlpha", "clampedTexture2DAlpha") + .replace("texture2D", "clampedTexture2D")); + return result; +} QGLPixmapBlurFilter::QGLPixmapBlurFilter(Qt::RenderHint hint) : m_haveCached(false) - , m_cachedRadius(5) + , m_cachedRadius(0) , m_hint(hint) { - if (hint == Qt::PerformanceHint) { - QGLPixmapBlurFilter *filter = const_cast<QGLPixmapBlurFilter *>(this); - filter->setSource(qt_gl_blur_filter_fast); - m_haveCached = true; - } } bool QGLPixmapBlurFilter::processGL(QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &) const { QGLPixmapBlurFilter *filter = const_cast<QGLPixmapBlurFilter *>(this); - int radius = qRound(this->radius()); - if (!m_haveCached || (m_hint == Qt::QualityHint && radius != m_cachedRadius)) { - // Only regenerate the shader from source if parameters have changed. - m_haveCached = true; - m_cachedRadius = radius; - filter->setSource(generateGaussianShader(radius)); + int actualRadius = qRound(radius()); + int filterRadius = actualRadius; + int fastRadii[] = { 1, 2, 3, 5, 8, 15, 25 }; + if (m_hint == Qt::PerformanceHint) { + uint i = 0; + for (; i < (sizeof(fastRadii)/sizeof(*fastRadii))-1; ++i) { + if (fastRadii[i+1] > filterRadius) + break; + } + filterRadius = fastRadii[i]; } - QGLFramebufferObjectFormat format; - format.setInternalTextureFormat(GLenum(src.hasAlphaChannel() ? GL_RGBA : GL_RGB)); - QGLFramebufferObject *fbo = qgl_fbo_pool()->acquire(src.size(), format); + m_singlePass = filterRadius <= 3; - if (!fbo) - return false; + if (!m_haveCached || filterRadius != m_cachedRadius) { + // Only regenerate the shader from source if parameters have changed. + m_haveCached = true; + m_cachedRadius = filterRadius; + QByteArray source = generateGaussianShader(filterRadius, m_singlePass); + filter->setSource(source); + } - glBindTexture(GL_TEXTURE_2D, fbo->texture()); + QRect targetRect = QRectF(src.rect()).translated(pos).adjusted(-actualRadius, -actualRadius, actualRadius, actualRadius).toAlignedRect(); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); - glBindTexture(GL_TEXTURE_2D, 0); + if (m_singlePass) { + // prepare for updateUniforms + m_textureSize = src.size(); - // prepare for updateUniforms - m_textureSize = src.size(); + // ensure GL_LINEAR filtering is used + painter->setRenderHint(QPainter::SmoothPixmapTransform); + filter->setOnPainter(painter); + QBrush pixmapBrush = src; + pixmapBrush.setTransform(QTransform::fromTranslate(pos.x(), pos.y())); + painter->fillRect(targetRect, pixmapBrush); + filter->removeFromPainter(painter); + } else { + QGLFramebufferObjectFormat format; + format.setInternalTextureFormat(GLenum(src.hasAlphaChannel() ? GL_RGBA : GL_RGB)); + QGLFramebufferObject *fbo = qgl_fbo_pool()->acquire(targetRect.size(), format); - // horizontal pass, to pixmap - m_horizontalBlur = true; + if (!fbo) + return false; - QPainter fboPainter(fbo); + glBindTexture(GL_TEXTURE_2D, fbo->texture()); - if (src.hasAlphaChannel()) { - glClearColor(0, 0, 0, 0); - glClear(GL_COLOR_BUFFER_BIT); - } + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + glBindTexture(GL_TEXTURE_2D, 0); - // ensure GL_LINEAR filtering is used - fboPainter.setRenderHint(QPainter::SmoothPixmapTransform); - filter->setOnPainter(&fboPainter); - fboPainter.drawPixmap(0, 0, src); - filter->removeFromPainter(&fboPainter); - fboPainter.end(); + // prepare for updateUniforms + m_textureSize = src.size(); - QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx *>(painter->paintEngine()); + // horizontal pass, to pixmap + m_horizontalBlur = true; - // vertical pass, to painter - m_horizontalBlur = false; + QPainter fboPainter(fbo); - painter->save(); - // ensure GL_LINEAR filtering is used - painter->setRenderHint(QPainter::SmoothPixmapTransform); - filter->setOnPainter(painter); - engine->drawTexture(src.rect().translated(pos.x(), pos.y()), fbo->texture(), fbo->size(), src.rect().translated(0, fbo->height() - src.height())); - filter->removeFromPainter(painter); - painter->restore(); + if (src.hasAlphaChannel()) { + glClearColor(0, 0, 0, 0); + glClear(GL_COLOR_BUFFER_BIT); + } - qgl_fbo_pool()->release(fbo); + // ensure GL_LINEAR filtering is used + fboPainter.setRenderHint(QPainter::SmoothPixmapTransform); + filter->setOnPainter(&fboPainter); + QBrush pixmapBrush = src; + pixmapBrush.setTransform(QTransform::fromTranslate(actualRadius, actualRadius)); + fboPainter.fillRect(QRect(0, 0, targetRect.width(), targetRect.height()), pixmapBrush); + filter->removeFromPainter(&fboPainter); + fboPainter.end(); + + QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx *>(painter->paintEngine()); + + // vertical pass, to painter + m_horizontalBlur = false; + m_textureSize = fbo->size(); + + painter->save(); + // ensure GL_LINEAR filtering is used + painter->setRenderHint(QPainter::SmoothPixmapTransform); + filter->setOnPainter(painter); + engine->drawTexture(targetRect, fbo->texture(), fbo->size(), QRect(QPoint(), targetRect.size()).translated(0, fbo->height() - targetRect.height())); + filter->removeFromPainter(painter); + painter->restore(); + + qgl_fbo_pool()->release(fbo); + } return true; } void QGLPixmapBlurFilter::setUniforms(QGLShaderProgram *program) { + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + if (m_hint == Qt::QualityHint) { - if (m_horizontalBlur) + if (m_singlePass) + program->setUniformValue("delta", 1.0 / m_textureSize.width(), 1.0 / m_textureSize.height()); + else if (m_horizontalBlur) program->setUniformValue("delta", 1.0 / m_textureSize.width(), 0.0); else program->setUniformValue("delta", 0.0, 1.0 / m_textureSize.height()); } else { - // 1.4 is chosen to most closely match the blurriness of the gaussian blur - // at low radii - qreal blur = radius() / 1.4f; + qreal blur = radius() / qreal(m_cachedRadius); - if (m_horizontalBlur) + if (m_singlePass) + program->setUniformValue("delta", blur / m_textureSize.width(), blur / m_textureSize.height()); + else if (m_horizontalBlur) program->setUniformValue("delta", blur / m_textureSize.width(), 0.0); else program->setUniformValue("delta", 0.0, blur / m_textureSize.height()); @@ -426,12 +460,21 @@ static inline qreal gaussian(qreal dx, qreal sigma) return exp(-dx * dx / (2 * sigma * sigma)) / (Q_2PI * sigma * sigma); } -QByteArray QGLPixmapBlurFilter::generateGaussianShader(int radius, bool dropShadow) +QByteArray QGLPixmapBlurFilter::generateGaussianShader(int radius, bool singlePass, bool dropShadow) { Q_ASSERT(radius >= 1); + radius = qMin(127, radius); + + static QCache<uint, QByteArray> shaderSourceCache; + uint key = radius | (int(singlePass) << 7) | (int(dropShadow) << 8); + QByteArray *cached = shaderSourceCache.object(key); + if (cached) + return *cached; + QByteArray source; source.reserve(1000); + source.append(qt_gl_texture_sampling_helper); source.append("uniform highp vec2 delta;\n"); if (dropShadow) @@ -446,7 +489,7 @@ QByteArray QGLPixmapBlurFilter::generateGaussianShader(int radius, bool dropShad qreal sigma = radius / 1.65; qreal sum = 0; - for (int i = -radius; i <= radius; ++i) { + for (int i = -radius; i < radius; ++i) { float value = gaussian(i, sigma); gaussianComponents << value; sum += value; @@ -464,43 +507,67 @@ QByteArray QGLPixmapBlurFilter::generateGaussianShader(int radius, bool dropShad weights << weight; } - // odd size ? - if (gaussianComponents.size() & 1) { - sampleOffsets << radius; - weights << gaussianComponents.last(); - } - - int currentVariable = 1; - source.append(" mediump vec4 sample = vec4(0.0);\n"); - source.append(" mediump vec2 coord;\n"); - - qreal weightSum = 0; - source.append(" mediump float c;\n"); - for (int i = 0; i < sampleOffsets.size(); ++i) { - qreal delta = sampleOffsets.at(i); - - ++currentVariable; + int limit = sampleOffsets.size(); + if (singlePass) + limit *= limit; + + QByteArray baseCoordinate = "srcCoords"; + + for (int i = 0; i < limit; ++i) { + QByteArray coordinate = baseCoordinate; + + qreal weight; + if (singlePass) { + const int xIndex = i % sampleOffsets.size(); + const int yIndex = i / sampleOffsets.size(); + + const qreal deltaX = sampleOffsets.at(xIndex); + const qreal deltaY = sampleOffsets.at(yIndex); + weight = weights.at(xIndex) * weights.at(yIndex); + + if (!qFuzzyCompare(deltaX, deltaY)) { + coordinate.append(" + vec2(delta.x * float("); + coordinate.append(QByteArray::number(deltaX)); + coordinate.append("), delta.y * float("); + coordinate.append(QByteArray::number(deltaY)); + coordinate.append("))"); + } else if (!qFuzzyIsNull(deltaX)) { + coordinate.append(" + delta * float("); + coordinate.append(QByteArray::number(deltaX)); + coordinate.append(")"); + } + } else { + const qreal delta = sampleOffsets.at(i); + weight = weights.at(i); + if (!qFuzzyIsNull(delta)) { + coordinate.append(" + delta * float("); + coordinate.append(QByteArray::number(delta)); + coordinate.append(")"); + } + } - QByteArray coordinate = "srcCoords"; - if (delta != qreal(0)) { - coordinate.append(" + delta * float("); - coordinate.append(QByteArray::number(delta)); - coordinate.append(")"); + if (i == 0) { + if (dropShadow) + source.append(" mediump float sample = "); + else + source.append(" mediump vec4 sample = "); + } else { + if (dropShadow) + source.append(" sample += "); + else + source.append(" sample += "); } - source.append(" coord = "); + source.append("texture2D(src, "); source.append(coordinate); - source.append(";\n"); + source.append(")"); if (dropShadow) - source.append(" sample += texture2D(src, coord).a * shadowColor"); - else - source.append(" sample += texture2D(src, coord)"); + source.append(".a"); - weightSum += weights.at(i); - if (weights.at(i) != qreal(1)) { + if (!qFuzzyCompare(weight, qreal(1))) { source.append(" * float("); - source.append(QByteArray::number(weights.at(i))); + source.append(QByteArray::number(weight)); source.append(");\n"); } else { source.append(";\n"); @@ -508,86 +575,109 @@ QByteArray QGLPixmapBlurFilter::generateGaussianShader(int radius, bool dropShad } source.append(" return "); + if (dropShadow) + source.append("shadowColor * "); source.append("sample;\n"); source.append("}\n"); + cached = new QByteArray(source); + shaderSourceCache.insert(key, cached); + return source; } QGLPixmapDropShadowFilter::QGLPixmapDropShadowFilter(Qt::RenderHint hint) : m_haveCached(false) - , m_cachedRadius(5) + , m_cachedRadius(0) , m_hint(hint) { - if (hint == Qt::PerformanceHint) { - QGLPixmapDropShadowFilter *filter = const_cast<QGLPixmapDropShadowFilter *>(this); - filter->setSource(qt_gl_drop_shadow_filter_fast); - m_haveCached = true; - } } bool QGLPixmapDropShadowFilter::processGL(QPainter *painter, const QPointF &pos, const QPixmap &src, const QRectF &srcRect) const { QGLPixmapDropShadowFilter *filter = const_cast<QGLPixmapDropShadowFilter *>(this); - int radius = qRound(this->blurRadius()); - if (!m_haveCached || (m_hint == Qt::QualityHint && radius != m_cachedRadius)) { + int actualRadius = qRound(blurRadius()); + int filterRadius = actualRadius; + m_singlePass = filterRadius <= 3; + + if (!m_haveCached || filterRadius != m_cachedRadius) { // Only regenerate the shader from source if parameters have changed. m_haveCached = true; - m_cachedRadius = radius; - filter->setSource(QGLPixmapBlurFilter::generateGaussianShader(radius, true)); + m_cachedRadius = filterRadius; + QByteArray source = QGLPixmapBlurFilter::generateGaussianShader(filterRadius, m_singlePass, true); + filter->setSource(source); } - QGLFramebufferObjectFormat format; - format.setInternalTextureFormat(GLenum(src.hasAlphaChannel() ? GL_RGBA : GL_RGB)); - QGLFramebufferObject *fbo = qgl_fbo_pool()->acquire(src.size(), format); - - if (!fbo) - return false; - - glBindTexture(GL_TEXTURE_2D, fbo->texture()); - - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); - glBindTexture(GL_TEXTURE_2D, 0); + QRect targetRect = QRectF(src.rect()).translated(pos + offset()).adjusted(-actualRadius, -actualRadius, actualRadius, actualRadius).toAlignedRect(); + + if (m_singlePass) { + // prepare for updateUniforms + m_textureSize = src.size(); + + painter->save(); + // ensure GL_LINEAR filtering is used + painter->setRenderHint(QPainter::SmoothPixmapTransform); + filter->setOnPainter(painter); + QBrush pixmapBrush = src; + pixmapBrush.setTransform(QTransform::fromTranslate(pos.x() + offset().x(), pos.y() + offset().y())); + painter->fillRect(targetRect, pixmapBrush); + filter->removeFromPainter(painter); + painter->restore(); + } else { + QGLFramebufferObjectFormat format; + format.setInternalTextureFormat(GLenum(src.hasAlphaChannel() ? GL_RGBA : GL_RGB)); + QGLFramebufferObject *fbo = qgl_fbo_pool()->acquire(targetRect.size(), format); - // prepare for updateUniforms - m_textureSize = src.size(); + if (!fbo) + return false; - // horizontal pass, to pixmap - m_horizontalBlur = true; + glBindTexture(GL_TEXTURE_2D, fbo->texture()); - QPainter fboPainter(fbo); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + glBindTexture(GL_TEXTURE_2D, 0); - if (src.hasAlphaChannel()) { - glClearColor(0, 0, 0, 0); - glClear(GL_COLOR_BUFFER_BIT); - } + // prepare for updateUniforms + m_textureSize = src.size(); - // ensure GL_LINEAR filtering is used - fboPainter.setRenderHint(QPainter::SmoothPixmapTransform); - filter->setOnPainter(&fboPainter); - fboPainter.drawPixmap(0, 0, src); - filter->removeFromPainter(&fboPainter); - fboPainter.end(); + // horizontal pass, to pixmap + m_horizontalBlur = true; - QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx *>(painter->paintEngine()); + QPainter fboPainter(fbo); - // vertical pass, to painter - m_horizontalBlur = false; - - painter->save(); - // ensure GL_LINEAR filtering is used - painter->setRenderHint(QPainter::SmoothPixmapTransform); - filter->setOnPainter(painter); - QPointF ofs = offset(); - engine->drawTexture(src.rect().translated(pos.x() + ofs.x(), pos.y() + ofs.y()), fbo->texture(), fbo->size(), src.rect().translated(0, fbo->height() - src.height())); - filter->removeFromPainter(painter); - painter->restore(); + if (src.hasAlphaChannel()) { + glClearColor(0, 0, 0, 0); + glClear(GL_COLOR_BUFFER_BIT); + } - qgl_fbo_pool()->release(fbo); + // ensure GL_LINEAR filtering is used + fboPainter.setRenderHint(QPainter::SmoothPixmapTransform); + filter->setOnPainter(&fboPainter); + QBrush pixmapBrush = src; + pixmapBrush.setTransform(QTransform::fromTranslate(actualRadius, actualRadius)); + fboPainter.fillRect(QRect(0, 0, targetRect.width(), targetRect.height()), pixmapBrush); + filter->removeFromPainter(&fboPainter); + fboPainter.end(); + + QGL2PaintEngineEx *engine = static_cast<QGL2PaintEngineEx *>(painter->paintEngine()); + + // vertical pass, to painter + m_horizontalBlur = false; + m_textureSize = fbo->size(); + + painter->save(); + // ensure GL_LINEAR filtering is used + painter->setRenderHint(QPainter::SmoothPixmapTransform); + filter->setOnPainter(painter); + engine->drawTexture(targetRect, fbo->texture(), fbo->size(), src.rect().translated(0, fbo->height() - src.height())); + filter->removeFromPainter(painter); + painter->restore(); + + qgl_fbo_pool()->release(fbo); + } // Now draw the actual pixmap over the top. painter->drawPixmap(pos, src, srcRect); @@ -597,8 +687,11 @@ bool QGLPixmapDropShadowFilter::processGL(QPainter *painter, const QPointF &pos, void QGLPixmapDropShadowFilter::setUniforms(QGLShaderProgram *program) { + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + QColor col = color(); - if (m_horizontalBlur) { + if (m_horizontalBlur && !m_singlePass) { program->setUniformValue("shadowColor", 1.0f, 1.0f, 1.0f, 1.0f); } else { qreal alpha = col.alphaF(); @@ -607,17 +700,20 @@ void QGLPixmapDropShadowFilter::setUniforms(QGLShaderProgram *program) col.blueF() * alpha, alpha); } + if (m_hint == Qt::QualityHint) { - if (m_horizontalBlur) + if (m_singlePass) + program->setUniformValue("delta", 1.0 / m_textureSize.width(), 1.0 / m_textureSize.height()); + else if (m_horizontalBlur) program->setUniformValue("delta", 1.0 / m_textureSize.width(), 0.0); else program->setUniformValue("delta", 0.0, 1.0 / m_textureSize.height()); } else { - // 1.4 is chosen to most closely match the blurriness of the gaussian blur - // at low radii - qreal blur = blurRadius() / 1.4f; + qreal blur = blurRadius() / qreal(m_cachedRadius); - if (m_horizontalBlur) + if (m_singlePass) + program->setUniformValue("delta", blur / m_textureSize.width(), blur / m_textureSize.height()); + else if (m_horizontalBlur) program->setUniformValue("delta", blur / m_textureSize.width(), 0.0); else program->setUniformValue("delta", 0.0, blur / m_textureSize.height()); |