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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtOpenGL module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QGRAPHICSCONTEXT_OPENGL2_P_H
#define QGRAPHICSCONTEXT_OPENGL2_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QDebug>
#include <private/qpaintengineex_p.h>
#include <private/qglengineshadermanager_p.h>
#include <private/qgl2pexvertexarray_p.h>
#include <private/qglpaintdevice_p.h>
#include <private/qglpixmapfilter_p.h>
#include <private/qfontengine_p.h>
#include <private/qdatabuffer_p.h>
#include <private/qtriangulatingstroker_p.h>
enum EngineMode {
ImageDrawingMode,
TextDrawingMode,
BrushDrawingMode,
ImageArrayDrawingMode
};
QT_BEGIN_NAMESPACE
#define GL_STENCIL_HIGH_BIT GLuint(0x80)
#define QT_BRUSH_TEXTURE_UNIT GLuint(0)
#define QT_IMAGE_TEXTURE_UNIT GLuint(0) //Can be the same as brush texture unit
#define QT_MASK_TEXTURE_UNIT GLuint(1)
#define QT_BACKGROUND_TEXTURE_UNIT GLuint(2)
class QGL2PaintEngineExPrivate;
class QOpenGL2PaintEngineState : public QPainterState
{
public:
QOpenGL2PaintEngineState(QOpenGL2PaintEngineState &other);
QOpenGL2PaintEngineState();
~QOpenGL2PaintEngineState();
uint isNew : 1;
uint needsClipBufferClear : 1;
uint clipTestEnabled : 1;
uint canRestoreClip : 1;
uint matrixChanged : 1;
uint compositionModeChanged : 1;
uint opacityChanged : 1;
uint renderHintsChanged : 1;
uint clipChanged : 1;
uint currentClip : 8;
QRect rectangleClip;
};
class Q_OPENGL_EXPORT QGL2PaintEngineEx : public QPaintEngineEx
{
Q_DECLARE_PRIVATE(QGL2PaintEngineEx)
public:
QGL2PaintEngineEx();
~QGL2PaintEngineEx();
bool begin(QPaintDevice *device);
void ensureActive();
bool end();
virtual void clipEnabledChanged();
virtual void penChanged();
virtual void brushChanged();
virtual void brushOriginChanged();
virtual void opacityChanged();
virtual void compositionModeChanged();
virtual void renderHintsChanged();
virtual void transformChanged();
virtual void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr);
virtual void drawPixmapFragments(const QPainter::PixmapFragment *fragments, int fragmentCount, const QPixmap &pixmap,
QPainter::PixmapFragmentHints hints);
virtual void drawImage(const QRectF &r, const QImage &pm, const QRectF &sr,
Qt::ImageConversionFlags flags = Qt::AutoColor);
virtual void drawTextItem(const QPointF &p, const QTextItem &textItem);
virtual void fill(const QVectorPath &path, const QBrush &brush);
virtual void stroke(const QVectorPath &path, const QPen &pen);
virtual void clip(const QVectorPath &path, Qt::ClipOperation op);
virtual void drawStaticTextItem(QStaticTextItem *textItem);
bool drawTexture(const QRectF &r, GLuint textureId, const QSize &size, const QRectF &sr);
Type type() const { return OpenGL2; }
virtual void setState(QPainterState *s);
virtual QPainterState *createState(QPainterState *orig) const;
inline QOpenGL2PaintEngineState *state() {
return static_cast<QOpenGL2PaintEngineState *>(QPaintEngineEx::state());
}
inline const QOpenGL2PaintEngineState *state() const {
return static_cast<const QOpenGL2PaintEngineState *>(QPaintEngineEx::state());
}
void beginNativePainting();
void endNativePainting();
void invalidateState();
QPixmapFilter *pixmapFilter(int type, const QPixmapFilter *prototype);
void setRenderTextActive(bool);
bool isNativePaintingActive() const;
private:
Q_DISABLE_COPY(QGL2PaintEngineEx)
};
class QGL2PaintEngineExPrivate : public QPaintEngineExPrivate
{
Q_DECLARE_PUBLIC(QGL2PaintEngineEx)
public:
enum StencilFillMode {
OddEvenFillMode,
WindingFillMode,
TriStripStrokeFillMode
};
QGL2PaintEngineExPrivate(QGL2PaintEngineEx *q_ptr) :
q(q_ptr),
shaderManager(0),
width(0), height(0),
ctx(0),
useSystemClip(true),
elementIndicesVBOId(0),
opacityArray(0),
snapToPixelGrid(false),
addOffset(false),
nativePaintingActive(false),
inverseScale(1),
lastMaskTextureUsed(0)
{ }
~QGL2PaintEngineExPrivate();
void updateBrushTexture();
void updateBrushUniforms();
void updateMatrix();
void updateCompositionMode();
void updateTextureFilter(GLenum target, GLenum wrapMode, bool smoothPixmapTransform, GLuint id = -1);
void resetGLState();
// fill, stroke, drawTexture, drawPixmaps & drawCachedGlyphs are the main rendering entry-points,
// however writeClip can also be thought of as en entry point as it does similar things.
void fill(const QVectorPath &path);
void stroke(const QVectorPath &path, const QPen &pen);
void drawTexture(const QGLRect& dest, const QGLRect& src, const QSize &textureSize, bool opaque, bool pattern = false);
void drawPixmapFragments(const QPainter::PixmapFragment *fragments, int fragmentCount, const QPixmap &pixmap,
QPainter::PixmapFragmentHints hints);
void drawCachedGlyphs(QFontEngineGlyphCache::Type glyphType, QStaticTextItem *staticTextItem);
// Calls glVertexAttributePointer if the pointer has changed
inline void setVertexAttributePointer(unsigned int arrayIndex, const GLfloat *pointer);
// draws whatever is in the vertex array:
void drawVertexArrays(const float *data, int *stops, int stopCount, GLenum primitive);
void drawVertexArrays(QGL2PEXVertexArray &vertexArray, GLenum primitive) {
drawVertexArrays((const float *) vertexArray.data(), vertexArray.stops(), vertexArray.stopCount(), primitive);
}
// Composites the bounding rect onto dest buffer:
void composite(const QGLRect& boundingRect);
// Calls drawVertexArrays to render into stencil buffer:
void fillStencilWithVertexArray(const float *data, int count, int *stops, int stopCount, const QGLRect &bounds, StencilFillMode mode);
void fillStencilWithVertexArray(QGL2PEXVertexArray& vertexArray, bool useWindingFill) {
fillStencilWithVertexArray((const float *) vertexArray.data(), 0, vertexArray.stops(), vertexArray.stopCount(),
vertexArray.boundingRect(),
useWindingFill ? WindingFillMode : OddEvenFillMode);
}
void setBrush(const QBrush& brush);
void transferMode(EngineMode newMode);
bool prepareForDraw(bool srcPixelsAreOpaque); // returns true if the program has changed
inline void useSimpleShader();
inline GLuint location(const QGLEngineShaderManager::Uniform uniform) {
return shaderManager->getUniformLocation(uniform);
}
void clearClip(uint value);
void writeClip(const QVectorPath &path, uint value);
void resetClipIfNeeded();
void updateClipScissorTest();
void setScissor(const QRect &rect);
void regenerateClip();
void systemStateChanged();
static QGLEngineShaderManager* shaderManagerForEngine(QGL2PaintEngineEx *engine) { return engine->d_func()->shaderManager; }
static QGL2PaintEngineExPrivate *getData(QGL2PaintEngineEx *engine) { return engine->d_func(); }
static void cleanupVectorPath(QPaintEngineEx *engine, void *data);
QGL2PaintEngineEx* q;
QGLEngineShaderManager* shaderManager;
QGLPaintDevice* device;
int width, height;
QGLContext *ctx;
EngineMode mode;
QFontEngineGlyphCache::Type glyphCacheType;
// Dirty flags
bool matrixDirty; // Implies matrix uniforms are also dirty
bool compositionModeDirty;
bool brushTextureDirty;
bool brushUniformsDirty;
bool opacityUniformDirty;
bool matrixUniformDirty;
bool stencilClean; // Has the stencil not been used for clipping so far?
bool useSystemClip;
QRegion dirtyStencilRegion;
QRect currentScissorBounds;
uint maxClip;
QBrush currentBrush; // May not be the state's brush!
const QBrush noBrush;
QPixmap currentBrushPixmap;
QGL2PEXVertexArray vertexCoordinateArray;
QGL2PEXVertexArray textureCoordinateArray;
QVector<GLushort> elementIndices;
GLuint elementIndicesVBOId;
QDataBuffer<GLfloat> opacityArray;
GLfloat staticVertexCoordinateArray[8];
GLfloat staticTextureCoordinateArray[8];
bool snapToPixelGrid;
bool addOffset; // When enabled, adds a 0.49,0.49 offset to matrix in updateMatrix
bool nativePaintingActive;
GLfloat pmvMatrix[3][3];
GLfloat inverseScale;
GLuint lastTextureUsed;
GLuint lastMaskTextureUsed;
bool needsSync;
bool multisamplingAlwaysEnabled;
GLfloat depthRange[2];
float textureInvertedY;
QTriangulatingStroker stroker;
QDashedStrokeProcessor dasher;
QScopedPointer<QPixmapFilter> convolutionFilter;
QScopedPointer<QPixmapFilter> colorizeFilter;
QScopedPointer<QPixmapFilter> blurFilter;
QScopedPointer<QPixmapFilter> dropShadowFilter;
QSet<QVectorPath::CacheEntry *> pathCaches;
QVector<GLuint> unusedVBOSToClean;
QVector<GLuint> unusedIBOSToClean;
const GLfloat *vertexAttribPointers[3];
};
void QGL2PaintEngineExPrivate::setVertexAttributePointer(unsigned int arrayIndex, const GLfloat *pointer)
{
Q_ASSERT(arrayIndex < 3);
if (pointer == vertexAttribPointers[arrayIndex])
return;
vertexAttribPointers[arrayIndex] = pointer;
if (arrayIndex == QT_OPACITY_ATTR)
glVertexAttribPointer(arrayIndex, 1, GL_FLOAT, GL_FALSE, 0, pointer);
else
glVertexAttribPointer(arrayIndex, 2, GL_FLOAT, GL_FALSE, 0, pointer);
}
QT_END_NAMESPACE
#endif
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