SkDebugCanvas.h revision 4fcd92d0bf09dc9c28643e83b95b6cbf9f1ff2b2 
1
2/*
3 * Copyright 2012 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10#ifndef SKDEBUGCANVAS_H_
11#define SKDEBUGCANVAS_H_
12
13#include "SkCanvas.h"
14#include "SkDrawCommand.h"
15#include "SkPicture.h"
16#include "SkTArray.h"
17#include "SkString.h"
18
19class SkTexOverrideFilter;
20
21class SK_API SkDebugCanvas : public SkCanvas {
22public:
23    SkDebugCanvas(int width, int height);
24    virtual ~SkDebugCanvas();
25
26    void toggleFilter(bool toggle) { fFilter = toggle; }
27
28    void setMegaVizMode(bool megaVizMode) { fMegaVizMode = megaVizMode; }
29
30    /**
31     * Enable or disable overdraw visualization
32     */
33    void setOverdrawViz(bool overdrawViz) { fOverdrawViz = overdrawViz; }
34
35    /**
36     * Enable or disable texure filtering override
37     */
38    void overrideTexFiltering(bool overrideTexFiltering, SkPaint::FilterLevel level);
39
40    /**
41        Executes all draw calls to the canvas.
42        @param canvas  The canvas being drawn to
43     */
44    void draw(SkCanvas* canvas);
45
46    /**
47        Executes the draw calls up to the specified index.
48        @param canvas  The canvas being drawn to
49        @param index  The index of the final command being executed
50     */
51    void drawTo(SkCanvas* canvas, int index);
52
53    /**
54        Returns the most recently calculated transformation matrix
55     */
56    const SkMatrix& getCurrentMatrix() {
57        return fMatrix;
58    }
59
60    /**
61        Returns the most recently calculated clip
62     */
63    const SkIRect& getCurrentClip() {
64        return fClip;
65    }
66
67    /**
68        Returns the index of the last draw command to write to the pixel at (x,y)
69     */
70    int getCommandAtPoint(int x, int y, int index);
71
72    /**
73        Removes the command at the specified index
74        @param index  The index of the command to delete
75     */
76    void deleteDrawCommandAt(int index);
77
78    /**
79        Returns the draw command at the given index.
80        @param index  The index of the command
81     */
82    SkDrawCommand* getDrawCommandAt(int index);
83
84    /**
85        Sets the draw command for a given index.
86        @param index  The index to overwrite
87        @param command The new command
88     */
89    void setDrawCommandAt(int index, SkDrawCommand* command);
90
91    /**
92        Returns information about the command at the given index.
93        @param index  The index of the command
94     */
95    SkTDArray<SkString*>* getCommandInfo(int index);
96
97    /**
98        Returns the visibility of the command at the given index.
99        @param index  The index of the command
100     */
101    bool getDrawCommandVisibilityAt(int index);
102
103    /**
104        Returns the vector of draw commands
105     */
106    SK_ATTR_DEPRECATED("please use getDrawCommandAt and getSize instead")
107    const SkTDArray<SkDrawCommand*>& getDrawCommands() const;
108
109    /**
110        Returns the vector of draw commands. Do not use this entry
111        point - it is going away!
112     */
113    SkTDArray<SkDrawCommand*>& getDrawCommands();
114
115    /**
116     * Returns the string vector of draw commands
117     */
118    SkTArray<SkString>* getDrawCommandsAsStrings() const;
119
120    /**
121        Returns length of draw command vector.
122     */
123    int getSize() const {
124        return fCommandVector.count();
125    }
126
127    /**
128        Toggles the visibility / execution of the draw command at index i with
129        the value of toggle.
130     */
131    void toggleCommand(int index, bool toggle);
132
133    void setBounds(int width, int height) {
134        fWidth = width;
135        fHeight = height;
136    }
137
138    void setUserMatrix(SkMatrix matrix) {
139        fUserMatrix = matrix;
140    }
141
142////////////////////////////////////////////////////////////////////////////////
143// Inherited from SkCanvas
144////////////////////////////////////////////////////////////////////////////////
145
146    virtual void clear(SkColor) SK_OVERRIDE;
147
148    virtual bool concat(const SkMatrix& matrix) SK_OVERRIDE;
149
150    virtual void drawBitmap(const SkBitmap&, SkScalar left, SkScalar top,
151                            const SkPaint*) SK_OVERRIDE;
152
153    virtual void drawBitmapRectToRect(const SkBitmap&, const SkRect* src,
154                                      const SkRect& dst, const SkPaint* paint,
155                                      DrawBitmapRectFlags flags) SK_OVERRIDE;
156
157    virtual void drawBitmapMatrix(const SkBitmap&, const SkMatrix&,
158                                  const SkPaint*) SK_OVERRIDE;
159
160    virtual void drawBitmapNine(const SkBitmap& bitmap, const SkIRect& center,
161                                const SkRect& dst, const SkPaint*) SK_OVERRIDE;
162
163    virtual void drawData(const void*, size_t) SK_OVERRIDE;
164
165    virtual void beginCommentGroup(const char* description) SK_OVERRIDE;
166
167    virtual void addComment(const char* kywd, const char* value) SK_OVERRIDE;
168
169    virtual void endCommentGroup() SK_OVERRIDE;
170
171    virtual void drawOval(const SkRect& oval, const SkPaint&) SK_OVERRIDE;
172
173    virtual void drawPaint(const SkPaint& paint) SK_OVERRIDE;
174
175    virtual void drawPath(const SkPath& path, const SkPaint&) SK_OVERRIDE;
176
177    virtual void drawPicture(SkPicture& picture) SK_OVERRIDE;
178
179    virtual void drawPoints(PointMode, size_t count, const SkPoint pts[],
180                            const SkPaint&) SK_OVERRIDE;
181
182    virtual void drawPosText(const void* text, size_t byteLength,
183                             const SkPoint pos[], const SkPaint&) SK_OVERRIDE;
184
185    virtual void drawPosTextH(const void* text, size_t byteLength,
186                              const SkScalar xpos[], SkScalar constY,
187                              const SkPaint&) SK_OVERRIDE;
188
189    virtual void drawRect(const SkRect& rect, const SkPaint&) SK_OVERRIDE;
190
191    virtual void drawRRect(const SkRRect& rrect, const SkPaint& paint) SK_OVERRIDE;
192
193    virtual void drawSprite(const SkBitmap&, int left, int top,
194                            const SkPaint*) SK_OVERRIDE;
195
196    virtual void drawText(const void* text, size_t byteLength, SkScalar x,
197                          SkScalar y, const SkPaint&) SK_OVERRIDE;
198
199    virtual void drawTextOnPath(const void* text, size_t byteLength,
200                                const SkPath& path, const SkMatrix* matrix,
201                                const SkPaint&) SK_OVERRIDE;
202
203    virtual void drawVertices(VertexMode, int vertexCount,
204                              const SkPoint vertices[], const SkPoint texs[],
205                              const SkColor colors[], SkXfermode*,
206                              const uint16_t indices[], int indexCount,
207                              const SkPaint&) SK_OVERRIDE;
208
209    virtual bool rotate(SkScalar degrees) SK_OVERRIDE;
210
211    virtual bool scale(SkScalar sx, SkScalar sy) SK_OVERRIDE;
212
213    virtual void setMatrix(const SkMatrix& matrix) SK_OVERRIDE;
214
215    virtual bool skew(SkScalar sx, SkScalar sy) SK_OVERRIDE;
216
217    virtual bool translate(SkScalar dx, SkScalar dy) SK_OVERRIDE;
218
219    static const int kVizImageHeight = 256;
220    static const int kVizImageWidth = 256;
221
222    virtual bool isClipEmpty() const SK_OVERRIDE { return false; }
223    virtual bool isClipRect() const SK_OVERRIDE { return true; }
224#ifdef SK_SUPPORT_LEGACY_GETCLIPTYPE
225    virtual ClipType getClipType() const SK_OVERRIDE {
226        return kRect_ClipType;
227    }
228#endif
229    virtual bool getClipBounds(SkRect* bounds) const SK_OVERRIDE {
230        if (NULL != bounds) {
231            bounds->setXYWH(0, 0,
232                            SkIntToScalar(this->imageInfo().fWidth),
233                            SkIntToScalar(this->imageInfo().fHeight));
234        }
235        return true;
236    }
237    virtual bool getClipDeviceBounds(SkIRect* bounds) const SK_OVERRIDE {
238        if (NULL != bounds) {
239            bounds->setLargest();
240        }
241        return true;
242    }
243
244protected:
245    virtual void onSave(SaveFlags) SK_OVERRIDE;
246    virtual bool onSaveLayer(const SkRect*, const SkPaint*, SaveFlags) SK_OVERRIDE;
247    virtual void onRestore() SK_OVERRIDE;
248
249    virtual void onDrawDRRect(const SkRRect&, const SkRRect&, const SkPaint&) SK_OVERRIDE;
250    virtual void onPushCull(const SkRect& cullRect) SK_OVERRIDE;
251    virtual void onPopCull() SK_OVERRIDE;
252
253    virtual void onClipRect(const SkRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
254    virtual void onClipRRect(const SkRRect&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
255    virtual void onClipPath(const SkPath&, SkRegion::Op, ClipEdgeStyle) SK_OVERRIDE;
256    virtual void onClipRegion(const SkRegion& region, SkRegion::Op) SK_OVERRIDE;
257
258    void markActiveCommands(int index);
259
260private:
261    SkTDArray<SkDrawCommand*> fCommandVector;
262    int fWidth;
263    int fHeight;
264    bool fFilter;
265    bool fMegaVizMode;
266    int fIndex;
267    SkMatrix fUserMatrix;
268    SkMatrix fMatrix;
269    SkIRect fClip;
270
271    bool fOverdrawViz;
272    SkDrawFilter* fOverdrawFilter;
273
274    bool fOverrideTexFiltering;
275    SkTexOverrideFilter* fTexOverrideFilter;
276
277    /**
278        Number of unmatched save() calls at any point during a draw.
279        If there are any saveLayer() calls outstanding, we need to resolve
280        all of them, which in practice means resolving all save() calls,
281        to avoid corruption of our canvas.
282    */
283    int fOutstandingSaveCount;
284
285    /**
286        The active saveLayer commands at a given point in the renderering.
287        Only used when "mega" visualization is enabled.
288    */
289    SkTDArray<SkDrawCommand*> fActiveLayers;
290
291    /**
292        The active cull commands at a given point in the rendering.
293        Only used when "mega" visualization is enabled.
294    */
295    SkTDArray<SkDrawCommand*> fActiveCulls;
296
297    /**
298        Adds the command to the classes vector of commands.
299        @param command  The draw command for execution
300     */
301    void addDrawCommand(SkDrawCommand* command);
302
303    /**
304        Applies any panning and zooming the user has specified before
305        drawing anything else into the canvas.
306     */
307    void applyUserTransform(SkCanvas* canvas);
308
309    typedef SkCanvas INHERITED;
310};
311
312#endif
313