From ab50b60f5cc237d5620f3ff3b2eb44c857f8f60b Mon Sep 17 00:00:00 2001 From: Holger Hans Peter Freyther Date: Mon, 26 Sep 2011 19:02:57 +0200 Subject: [PATCH] [blitter] Work on tst_QPixmap::clear() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit By default QPixmap may not hasAlphaChannel(), only if setMask() or fill() with a transparent color is called a QPixmap will hasAlphaChannel(). Make the QBlittablePlatformPixmap remember if there is an alpha channel, pass this as parameter in createBlittable to make it clear that this is required and not optional. Update the DirectFB plugin to handle this parameter to create a RGB32 or ARGB Surface depending on the alpha value, also only use PreMultiplied alpha when using ARGB. Separate the two constructors for the QDirectFbBlitter to either adopt a DirectFB Surface or to create one. Change-Id: I8abf82408ecd2d075fc6f241ace8be2a34ac56e7 Reviewed-by: Jørgen Lind --- src/gui/image/qpixmap_blitter.cpp | 15 +++++++-- src/gui/image/qpixmap_blitter_p.h | 3 +- .../platforms/directfb/qdirectfbblitter.cpp | 33 ++++++++++++------- .../platforms/directfb/qdirectfbblitter.h | 10 ++++-- 4 files changed, 45 insertions(+), 16 deletions(-) diff --git a/src/gui/image/qpixmap_blitter.cpp b/src/gui/image/qpixmap_blitter.cpp index 8a72b2930e..2a47a891c7 100644 --- a/src/gui/image/qpixmap_blitter.cpp +++ b/src/gui/image/qpixmap_blitter.cpp @@ -58,6 +58,7 @@ static int global_ser_no = 0; QBlittablePlatformPixmap::QBlittablePlatformPixmap() : QPlatformPixmap(QPlatformPixmap::PixmapType,BlitterClass) + , m_alpha(false) #ifdef QT_BLITTER_RASTEROVERLAY ,m_rasterOverlay(0), m_unmergedCopy(0) #endif //QT_BLITTER_RASTEROVERLAY @@ -77,7 +78,7 @@ QBlittable *QBlittablePlatformPixmap::blittable() const { if (!m_blittable) { QBlittablePlatformPixmap *that = const_cast(this); - that->m_blittable.reset(this->createBlittable(QSize(w, h))); + that->m_blittable.reset(this->createBlittable(QSize(w, h), m_alpha)); } return m_blittable.data(); @@ -133,7 +134,16 @@ void QBlittablePlatformPixmap::fill(const QColor &color) if (color.alpha() == 255 && blittable()->capabilities() & QBlittable::SolidRectCapability) { blittable()->unlock(); blittable()->fillRect(QRectF(0,0,w,h),color); - }else { + } else { + // Need to be backed with an alpha channel now. It would be nice + // if we could just change the format, e.g. when going from + // RGB32 -> ARGB8888. + if (color.alpha() != 255 && !hasAlphaChannel()) { + m_blittable.reset(0); + m_engine.reset(0); + m_alpha = true; + } + uint pixel; switch (blittable()->lock()->format()) { case QImage::Format_ARGB32_Premultiplied: @@ -179,6 +189,7 @@ bool QBlittablePlatformPixmap::hasAlphaChannel() const void QBlittablePlatformPixmap::fromImage(const QImage &image, Qt::ImageConversionFlags flags) { + m_alpha = image.hasAlphaChannel(); resize(image.width(),image.height()); markRasterOverlay(QRect(0,0,w,h)); QImage *thisImg = buffer(); diff --git a/src/gui/image/qpixmap_blitter_p.h b/src/gui/image/qpixmap_blitter_p.h index 3c32e8f919..b0a9b7f848 100644 --- a/src/gui/image/qpixmap_blitter_p.h +++ b/src/gui/image/qpixmap_blitter_p.h @@ -55,7 +55,7 @@ public: QBlittablePlatformPixmap(); ~QBlittablePlatformPixmap(); - virtual QBlittable *createBlittable(const QSize &size) const = 0; + virtual QBlittable *createBlittable(const QSize &size, bool alpha) const = 0; QBlittable *blittable() const; void setBlittable(QBlittable *blittable); @@ -85,6 +85,7 @@ public: protected: QScopedPointer m_engine; QScopedPointer m_blittable; + bool m_alpha; #ifdef QT_BLITTER_RASTEROVERLAY QImage *m_rasterOverlay; diff --git a/src/plugins/platforms/directfb/qdirectfbblitter.cpp b/src/plugins/platforms/directfb/qdirectfbblitter.cpp index a4da2d8142..7df96c10c7 100644 --- a/src/plugins/platforms/directfb/qdirectfbblitter.cpp +++ b/src/plugins/platforms/directfb/qdirectfbblitter.cpp @@ -54,22 +54,33 @@ QDirectFbBlitter::QDirectFbBlitter(const QSize &rect, IDirectFBSurface *surface) |QBlittable::SourceOverPixmapCapability |QBlittable::SourceOverScaledPixmapCapability)) { - if (surface) { - m_surface = surface; - } else { - DFBSurfaceDescription surfaceDesc; - memset(&surfaceDesc,0,sizeof(DFBSurfaceDescription)); - surfaceDesc.width = rect.width(); - surfaceDesc.height = rect.height(); + m_surface = surface; +} + +QDirectFbBlitter::QDirectFbBlitter(const QSize &rect, bool alpha) + : QBlittable(rect, QBlittable::Capabilities(QBlittable::SolidRectCapability + |QBlittable::SourcePixmapCapability + |QBlittable::SourceOverPixmapCapability + |QBlittable::SourceOverScaledPixmapCapability)) +{ + DFBSurfaceDescription surfaceDesc; + memset(&surfaceDesc,0,sizeof(DFBSurfaceDescription)); + surfaceDesc.width = rect.width(); + surfaceDesc.height = rect.height(); + + if (alpha) { surfaceDesc.caps = DSCAPS_PREMULTIPLIED; surfaceDesc.pixelformat = DSPF_ARGB; surfaceDesc.flags = DFBSurfaceDescriptionFlags(DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_CAPS | DSDESC_PIXELFORMAT); - - IDirectFB *dfb = QDirectFbConvenience::dfbInterface(); - dfb->CreateSurface(dfb,&surfaceDesc, &m_surface); - m_surface->Clear(m_surface,0,0,0,0); + } else { + surfaceDesc.flags = DFBSurfaceDescriptionFlags(DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT); + surfaceDesc.pixelformat = DSPF_RGB32; } + + IDirectFB *dfb = QDirectFbConvenience::dfbInterface(); + dfb->CreateSurface(dfb , &surfaceDesc, &m_surface); + m_surface->Clear(m_surface, 0, 0, 0, 0); } QDirectFbBlitter::~QDirectFbBlitter() diff --git a/src/plugins/platforms/directfb/qdirectfbblitter.h b/src/plugins/platforms/directfb/qdirectfbblitter.h index 2dcb2be07a..e9a77c2707 100644 --- a/src/plugins/platforms/directfb/qdirectfbblitter.h +++ b/src/plugins/platforms/directfb/qdirectfbblitter.h @@ -51,7 +51,8 @@ class QDirectFbBlitter : public QBlittable { public: - QDirectFbBlitter(const QSize &size, IDirectFBSurface *surface = 0); + QDirectFbBlitter(const QSize &size, IDirectFBSurface *surface); + QDirectFbBlitter(const QSize &size, bool alpha); virtual ~QDirectFbBlitter(); virtual void fillRect(const QRectF &rect, const QColor &color); @@ -70,7 +71,12 @@ protected: class QDirectFbBlitterPlatformPixmap : public QBlittablePlatformPixmap { public: - QBlittable *createBlittable(const QSize &size) const { return new QDirectFbBlitter(size); } + QBlittable *createBlittable(const QSize &size, bool alpha) const; }; +inline QBlittable *QDirectFbBlitterPlatformPixmap::createBlittable(const QSize& size, bool alpha) const +{ + return new QDirectFbBlitter(size, alpha); +} + #endif // QDIRECTFBBLITTER_H