summaryrefslogtreecommitdiffstats
path: root/src/gui/painting/qpaintengine_raster_p.h
blob: 3dab49139abef67489b06acda6b0834b714b48f4 (plain)
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
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui 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 QPAINTENGINE_RASTER_P_H
#define QPAINTENGINE_RASTER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "private/qpaintengineex_p.h"
#include "QtGui/qpainterpath.h"
#include "private/qdatabuffer_p.h"
#include "private/qdrawhelper_p.h"
#include "private/qpaintengine_p.h"
#include "private/qrasterizer_p.h"
#include "private/qstroker_p.h"
#include "private/qpainter_p.h"
#include "private/qtextureglyphcache_p.h"

#include <stdlib.h>

QT_BEGIN_NAMESPACE

class QOutlineMapper;
class QRasterPaintEnginePrivate;
class QRasterBuffer;
class QClipData;
class QCustomRasterPaintDevice;

class QRasterPaintEngineState : public QPainterState
{
public:
    QRasterPaintEngineState(QRasterPaintEngineState &other);
    QRasterPaintEngineState();
    ~QRasterPaintEngineState();


    QPen lastPen;
    QSpanData penData;
    QStrokerOps *stroker;
    uint strokeFlags;

    QBrush lastBrush;
    QSpanData brushData;
    uint fillFlags;

    uint pixmapFlags;
    int intOpacity;

    qreal txscale;

    QClipData *clip;
//     QRect clipRect;
//     QRegion clipRegion;

//     QPainter::RenderHints hints;
//     QPainter::CompositionMode compositionMode;

    uint dirty;

    struct Flags {
        uint has_clip_ownership : 1;        // should delete the clip member..
        uint fast_pen : 1;                  // cosmetic 1-width pens, using midpoint drawlines
        uint non_complex_pen : 1;           // can use rasterizer, rather than stroker
        uint antialiased : 1;
        uint bilinear : 1;
        uint fast_text : 1;
        uint int_xform : 1;
        uint tx_noshear : 1;
        uint fast_images : 1;
    };

    union {
        Flags flags;
        uint flag_bits;
    };
};




/*******************************************************************************
 * QRasterPaintEngine
 */
class
#ifdef Q_WS_QWS
Q_GUI_EXPORT
#endif
QRasterPaintEngine : public QPaintEngineEx
{
    Q_DECLARE_PRIVATE(QRasterPaintEngine)
public:

    QRasterPaintEngine(QPaintDevice *device);
    ~QRasterPaintEngine();
    bool begin(QPaintDevice *device);
    bool end();

    void penChanged();
    void brushChanged();
    void brushOriginChanged();
    void opacityChanged();
    void compositionModeChanged();
    void renderHintsChanged();
    void transformChanged();
    void clipEnabledChanged();

    void setState(QPainterState *s);
    QPainterState *createState(QPainterState *orig) const;
    inline QRasterPaintEngineState *state() {
        return static_cast<QRasterPaintEngineState *>(QPaintEngineEx::state());
    }
    inline const QRasterPaintEngineState *state() const {
        return static_cast<const QRasterPaintEngineState *>(QPaintEngineEx::state());
    }

    void updateBrush(const QBrush &brush);
    void updatePen(const QPen &pen);

    void updateMatrix(const QTransform &matrix);

    void drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode);
    void drawPolygon(const QPoint *points, int pointCount, PolygonDrawMode mode);
    void fillPath(const QPainterPath &path, QSpanData *fillData);
    void fillPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode);

    void drawEllipse(const QRectF &rect);

    void fillRect(const QRectF &rect, const QBrush &brush);
    void fillRect(const QRectF &rect, const QColor &color);

    void drawRects(const QRect  *rects, int rectCount);
    void drawRects(const QRectF *rects, int rectCount);

    void drawPixmap(const QPointF &p, const QPixmap &pm);
    void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr);
    void drawImage(const QPointF &p, const QImage &img);
    void drawImage(const QRectF &r, const QImage &pm, const QRectF &sr,
                   Qt::ImageConversionFlags falgs = Qt::AutoColor);
    void drawTiledPixmap(const QRectF &r, const QPixmap &pm, const QPointF &sr);
    void drawTextItem(const QPointF &p, const QTextItem &textItem);

    void drawLines(const QLine *line, int lineCount);
    void drawLines(const QLineF *line, int lineCount);

    void drawPoints(const QPointF *points, int pointCount);
    void drawPoints(const QPoint *points, int pointCount);

    void stroke(const QVectorPath &path, const QPen &pen);
    void fill(const QVectorPath &path, const QBrush &brush);

    void strokePolygonCosmetic(const QPoint *pts, int pointCount, PolygonDrawMode mode);
    void strokePolygonCosmetic(const QPointF *pt, int pointCount, PolygonDrawMode mode);

    void clip(const QVectorPath &path, Qt::ClipOperation op);
    void clip(const QRect &rect, Qt::ClipOperation op);
    void clip(const QRegion &region, Qt::ClipOperation op);

    enum ClipType {
        RectClip,
        ComplexClip
    };
    ClipType clipType() const;
    QRect clipBoundingRect() const;

#ifdef Q_NO_USING_KEYWORD
    inline void drawEllipse(const QRect &rect) { QPaintEngineEx::drawEllipse(rect); }
#else
    using QPaintEngineEx::drawPolygon;
    using QPaintEngineEx::drawEllipse;
#endif

    void releaseBuffer();

    QSize size() const;

#ifndef QT_NO_DEBUG
    void saveBuffer(const QString &s) const;
#endif

#ifdef Q_WS_MAC
    void setCGContext(CGContextRef ref);
    CGContextRef getCGContext() const;
#endif

#ifdef Q_WS_WIN
    void setDC(HDC hdc);
    HDC getDC() const;
    void releaseDC(HDC hdc) const;
#endif

    void alphaPenBlt(const void* src, int bpl, int depth, int rx,int ry,int w,int h);

    Type type() const { return Raster; }

    QPoint coordinateOffset() const;

#if defined(Q_WS_QWS) && !defined(QT_NO_RASTERCALLBACKS)
    virtual void drawColorSpans(const QSpan *spans, int count, uint color);
    virtual void drawBufferSpan(const uint *buffer, int bufsize,
                                int x, int y, int length, uint const_alpha);
#endif

protected:
    QRasterPaintEngine(QRasterPaintEnginePrivate &d, QPaintDevice *);
private:
    friend struct QSpanData;
    void init();

    void fillRect(const QRectF &rect, QSpanData *data);
    void drawBitmap(const QPointF &pos, const QImage &image, QSpanData *fill);

    void drawCachedGlyphs(const QPointF &p, const QTextItemInt &ti);

    inline void ensureBrush(const QBrush &brush) {
        if (!qbrush_fast_equals(state()->lastBrush, brush) || state()->fillFlags)
            updateBrush(brush);
    }
    inline void ensureBrush() { ensureBrush(state()->brush); }

    inline void ensurePen(const QPen &pen) {
        if (!qpen_fast_equals(state()->lastPen, pen) || state()->strokeFlags)
            updatePen(pen);
    }
    inline void ensurePen() { ensurePen(state()->pen); }

    void updateOutlineMapper();
    inline void ensureOutlineMapper();

    void updateState();
    inline void ensureState() {
        if (state()->dirty)
            updateState();
    }
};


/*******************************************************************************
 * QRasterPaintEnginePrivate
 */
class
#ifdef Q_WS_QWS
Q_GUI_EXPORT
#endif
QRasterPaintEnginePrivate : public QPaintEngineExPrivate
{
    Q_DECLARE_PUBLIC(QRasterPaintEngine)
public:

    void rasterizeLine_dashed(QLineF line, qreal width,
                              int *dashIndex, qreal *dashOffset, bool *inDash);
    void rasterize(QT_FT_Outline *outline, ProcessSpans callback, QSpanData *spanData, QRasterBuffer *rasterBuffer);
    void rasterize(QT_FT_Outline *outline, ProcessSpans callback, void *userData, QRasterBuffer *rasterBuffer);
    void updateMatrixData(QSpanData *spanData, const QBrush &brush, const QTransform &brushMatrix);

    void systemStateChanged();

    void drawImage(const QPointF &pt, const QImage &img, SrcOverBlendFunc func,
                   const QRect &clip, int alpha, const QRect &sr = QRect());

    QTransform brushMatrix() const {
        Q_Q(const QRasterPaintEngine);
        const QRasterPaintEngineState *s = q->state();
        QTransform m(s->matrix);
        m.translate(s->brushOrigin.x(), s->brushOrigin.y());
        return m;
    }

    bool isUnclipped_normalized(const QRect &rect) const;
    bool isUnclipped(const QRect &rect, int penWidth) const;
    bool isUnclipped(const QRectF &rect, int penWidth) const;
    ProcessSpans getPenFunc(const QRect &rect, const QSpanData *data) const;
    ProcessSpans getPenFunc(const QRectF &rect, const QSpanData *data) const;
    ProcessSpans getBrushFunc(const QRect &rect, const QSpanData *data) const;
    ProcessSpans getBrushFunc(const QRectF &rect, const QSpanData *data) const;

#ifdef Q_WS_QWS
    void prepare(QCustomRasterPaintDevice *);
#endif

    inline const QClipData *clip() const;

    void initializeRasterizer(QSpanData *data);

    void recalculateFastImages();

    QPaintDevice *device;
    QOutlineMapper *outlineMapper;
    QRasterBuffer *rasterBuffer;

#if defined (Q_WS_WIN)
    HDC hdc;
#elif defined(Q_WS_MAC)
    CGContextRef cgContext;
#endif

    QRect deviceRect;

    QStroker basicStroker;
    QDashStroker *dashStroker;

    QT_FT_Raster *grayRaster;
    unsigned long rasterPoolSize;
    unsigned char *rasterPoolBase;

    QDataBuffer<QLineF> cachedLines;
    QSpanData image_filler;
    QSpanData image_filler_xform;
    QSpanData solid_color_filler;


    QFontEngineGlyphCache::Type glyphCacheType;

    QClipData *baseClip;

    int deviceDepth;

    uint mono_surface : 1;
    uint outlinemapper_xform_dirty : 1;

#ifdef Q_WS_WIN
    uint isPlain45DegreeRotation : 1;
#endif

    QRasterizer *rasterizer;
};


class QClipData {
public:
    QClipData(int height);
    ~QClipData();

    int clipSpanHeight;
    struct ClipLine {
        int count;
        QSpan *spans;
    } *m_clipLines;

    void initialize();

    inline ClipLine *clipLines() {
        if (!m_clipLines)
            initialize();
        return m_clipLines;
    }

    inline QSpan *spans() {
        if (!m_spans)
            initialize();
        return m_spans;
    }

    int allocated;
    int count;
    QSpan *m_spans;
    int xmin, xmax, ymin, ymax;

    QRect clipRect;
    QRegion clipRegion;

    uint enabled : 1;
    uint hasRectClip : 1;
    uint hasRegionClip : 1;

    void appendSpan(int x, int length, int y, int coverage);
    void appendSpans(const QSpan *s, int num);

    // ### Should optimize and actually kill the QSpans if the rect is
    // ### a subset of The current region. Thus the "fast" clipspan
    // ### callback can be used
    void setClipRect(const QRect &rect);
    void setClipRegion(const QRegion &region);
    void fixup();
};

inline void QClipData::appendSpan(int x, int length, int y, int coverage)
{
    Q_ASSERT(m_spans); // initialize() has to be called prior to adding spans..

    if (count == allocated) {
        allocated *= 2;
        m_spans = (QSpan *)realloc(m_spans, allocated*sizeof(QSpan));
    }
    m_spans[count].x = x;
    m_spans[count].len = length;
    m_spans[count].y = y;
    m_spans[count].coverage = coverage;
    ++count;
}

inline void QClipData::appendSpans(const QSpan *s, int num)
{
    Q_ASSERT(m_spans);

    if (count + num > allocated) {
        do {
            allocated *= 2;
        } while (count + num > allocated);
        m_spans = (QSpan *)realloc(m_spans, allocated*sizeof(QSpan));
    }
    memcpy(m_spans+count, s, num*sizeof(QSpan));
    count += num;
}

#ifdef Q_WS_QWS
class Q_GUI_EXPORT QCustomRasterPaintDevice : public QPaintDevice
{
public:
    QCustomRasterPaintDevice(QWidget *w) : widget(w) {}

    int devType() const { return QInternal::CustomRaster; }

    virtual int metric(PaintDeviceMetric m) const;

    virtual void* memory() const { return 0; }

    virtual QImage::Format format() const {
        return QImage::Format_ARGB32_Premultiplied;
    }

    virtual int bytesPerLine() const;

    virtual QSize size() const {
        return static_cast<QRasterPaintEngine*>(paintEngine())->size();
    }

private:
    QWidget *widget;
};
#endif // Q_WS_QWS

/*******************************************************************************
 * QRasterBuffer
 */
class QRasterBuffer
{
public:
    QRasterBuffer() : m_width(0), m_height(0), m_buffer(0) { init(); }

    ~QRasterBuffer();

    void init();

    QImage::Format prepare(QImage *image);
    QImage::Format prepare(QPixmap *pix);
#ifdef Q_WS_QWS
    void prepare(QCustomRasterPaintDevice *device);
#endif
    void prepare(int w, int h);
    void prepareBuffer(int w, int h);

    void resetBuffer(int val=0);

    uchar *scanLine(int y) { Q_ASSERT(y>=0); Q_ASSERT(y<m_height); return m_buffer + y * bytes_per_line; }

#ifndef QT_NO_DEBUG
    QImage bufferImage() const;
#endif

    void flushToARGBImage(QImage *image) const;

    int width() const { return m_width; }
    int height() const { return m_height; }
    int bytesPerLine() const { return bytes_per_line; }
    int bytesPerPixel() const { return bytes_per_pixel; }

    uchar *buffer() const { return m_buffer; }

    bool monoDestinationWithClut;
    QRgb destColor0;
    QRgb destColor1;

    QPainter::CompositionMode compositionMode;
    QImage::Format format;
    DrawHelper *drawHelper;
    QImage colorizeBitmap(const QImage &image, const QColor &color);

private:
    int m_width;
    int m_height;
    int bytes_per_line;
    int bytes_per_pixel;
    uchar *m_buffer;
};

inline void QRasterPaintEngine::ensureOutlineMapper() {
    if (d_func()->outlinemapper_xform_dirty)
        updateOutlineMapper();
}

inline const QClipData *QRasterPaintEnginePrivate::clip() const {
    Q_Q(const QRasterPaintEngine);
    if (q->state() && q->state()->clip && q->state()->clip->enabled)
        return q->state()->clip;
    return baseClip;
}


QT_END_NAMESPACE
#endif // QPAINTENGINE_RASTER_P_H