1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** 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 either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://www.qtsoftware.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#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>
enum EngineMode {
ImageDrawingMode,
TextDrawingMode,
BrushDrawingMode
};
QT_BEGIN_NAMESPACE
class QGL2PaintEngineExPrivate;
class QOpenGL2PaintEngineState : public QPainterState
{
public:
QOpenGL2PaintEngineState(QOpenGL2PaintEngineState &other);
QOpenGL2PaintEngineState();
~QOpenGL2PaintEngineState();
bool needsDepthBufferClear;
qreal depthBufferClearValue;
bool depthTestEnabled;
bool scissorTestEnabled;
qreal currentDepth;
qreal maxDepth;
bool canRestoreClip;
};
class QGL2PaintEngineEx : public QPaintEngineEx
{
Q_DECLARE_PRIVATE(QGL2PaintEngineEx)
public:
QGL2PaintEngineEx();
~QGL2PaintEngineEx();
bool begin(QPaintDevice *device);
bool end();
void ensureActive();
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 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 drawImage(const QRectF &r, const QImage &pm, const QRectF &sr,
Qt::ImageConversionFlags flags = Qt::AutoColor);
virtual void drawTextItem(const QPointF &p, const QTextItem &textItem);
Type type() const { return OpenGL; }
void setState(QPainterState *s);
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());
}
virtual void sync();
private:
Q_DISABLE_COPY(QGL2PaintEngineEx)
};
class QGL2PaintEngineExPrivate : public QPaintEngineExPrivate
{
Q_DECLARE_PUBLIC(QGL2PaintEngineEx)
public:
QGL2PaintEngineExPrivate(QGL2PaintEngineEx *q_ptr) :
q(q_ptr),
width(0), height(0),
ctx(0),
currentBrush( &(q->state()->brush) ),
inverseScale(1),
shaderManager(0)
{ }
~QGL2PaintEngineExPrivate();
void updateBrushTexture();
void updateBrushUniforms();
void updateMatrix();
void updateCompositionMode();
void updateTextureFilter(GLenum target, GLenum wrapMode, bool smoothPixmapTransform);
void setBrush(const QBrush* brush);
void transferMode(EngineMode newMode);
// fill, drawOutline, drawTexture & drawCachedGlyphs are the rendering entry points:
void fill(const QVectorPath &path);
void drawOutline(const QVectorPath& path);
void drawTexture(const QGLRect& dest, const QGLRect& src, const QSize &textureSize, bool opaque, bool pattern = false);
void drawCachedGlyphs(const QPointF &p, const QTextItemInt &ti);
void drawVertexArrays(QGL2PEXVertexArray& vertexArray, GLenum primitive);
// ^ draws whatever is in the vertex array
void composite(const QGLRect& boundingRect);
// ^ Composites the bounding rect onto dest buffer
void fillStencilWithVertexArray(QGL2PEXVertexArray& vertexArray, bool useWindingFill);
// ^ Calls drawVertexArrays to render into stencil buffer
void prepareForDraw(bool srcPixelsAreOpaque);
inline void useSimpleShader();
inline QColor premultiplyColor(QColor c, GLfloat opacity);
QGL2PaintEngineEx* q;
QGLDrawable drawable;
int width, height;
QGLContext *ctx;
EngineMode mode;
mutable QOpenGL2PaintEngineState *last_created_state;
// Dirty flags
bool matrixDirty; // Implies matrix uniforms are also dirty
bool compositionModeDirty;
bool brushTextureDirty;
bool brushUniformsDirty;
bool simpleShaderMatrixUniformDirty;
bool shaderMatrixUniformDirty;
bool stencilBufferDirty;
bool depthUniformDirty;
bool simpleShaderDepthUniformDirty;
const QBrush* currentBrush; // May not be the state's brush!
GLfloat inverseScale;
QGL2PEXVertexArray vertexCoordinateArray;
QGL2PEXVertexArray textureCoordinateArray;
GLfloat staticVertexCoordinateArray[8];
GLfloat staticTextureCoordinateArray[8];
GLfloat pmvMatrix[4][4];
QGLEngineShaderManager* shaderManager;
void writeClip(const QVectorPath &path, float depth);
void updateDepthScissorTest();
void regenerateDepthClip();
void systemStateChanged();
uint use_system_clip : 1;
};
QT_END_NAMESPACE
#endif
|
