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1 : /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 : * vim: set ts=8 sts=2 et sw=2 tw=80:
3 : * This Source Code Form is subject to the terms of the Mozilla Public
4 : * License, v. 2.0. If a copy of the MPL was not distributed with this
5 : * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 :
7 : #ifndef MOZILLA_GFX_DRAWTARGETWRAPANDRECORD_H_
8 : #define MOZILLA_GFX_DRAWTARGETWRAPANDRECORD_H_
9 :
10 : #include "2D.h"
11 : #include "DrawEventRecorder.h"
12 :
13 : namespace mozilla {
14 : namespace gfx {
15 :
16 : class DrawTargetWrapAndRecord : public DrawTarget
17 : {
18 : public:
19 0 : MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawTargetWrapAndRecord, override)
20 : DrawTargetWrapAndRecord(DrawEventRecorder *aRecorder, DrawTarget *aDT, bool aHasData = false);
21 :
22 : ~DrawTargetWrapAndRecord();
23 :
24 0 : virtual DrawTargetType GetType() const override { return mFinalDT->GetType(); }
25 0 : virtual BackendType GetBackendType() const override { return mFinalDT->GetBackendType(); }
26 0 : virtual bool IsRecording() const override { return true; }
27 :
28 : virtual already_AddRefed<SourceSurface> Snapshot() override;
29 : virtual already_AddRefed<SourceSurface> IntoLuminanceSource(LuminanceType aLuminanceType, float aOpacity) override;
30 :
31 : virtual void DetachAllSnapshots() override;
32 :
33 0 : virtual IntSize GetSize() override { return mFinalDT->GetSize(); }
34 :
35 : /* Ensure that the DrawTarget backend has flushed all drawing operations to
36 : * this draw target. This must be called before using the backing surface of
37 : * this draw target outside of GFX 2D code.
38 : */
39 0 : virtual void Flush() override { mFinalDT->Flush(); }
40 :
41 : /*
42 : * Draw a surface to the draw target. Possibly doing partial drawing or
43 : * applying scaling. No sampling happens outside the source.
44 : *
45 : * aSurface Source surface to draw
46 : * aDest Destination rectangle that this drawing operation should draw to
47 : * aSource Source rectangle in aSurface coordinates, this area of aSurface
48 : * will be stretched to the size of aDest.
49 : * aOptions General draw options that are applied to the operation
50 : * aSurfOptions DrawSurface options that are applied
51 : */
52 : virtual void DrawSurface(SourceSurface *aSurface,
53 : const Rect &aDest,
54 : const Rect &aSource,
55 : const DrawSurfaceOptions &aSurfOptions = DrawSurfaceOptions(),
56 : const DrawOptions &aOptions = DrawOptions()) override;
57 :
58 : virtual void DrawFilter(FilterNode *aNode,
59 : const Rect &aSourceRect,
60 : const Point &aDestPoint,
61 : const DrawOptions &aOptions = DrawOptions()) override;
62 :
63 : /*
64 : * Blend a surface to the draw target with a shadow. The shadow is drawn as a
65 : * gaussian blur using a specified sigma. The shadow is clipped to the size
66 : * of the input surface, so the input surface should contain a transparent
67 : * border the size of the approximate coverage of the blur (3 * aSigma).
68 : * NOTE: This function works in device space!
69 : *
70 : * aSurface Source surface to draw.
71 : * aDest Destination point that this drawing operation should draw to.
72 : * aColor Color of the drawn shadow
73 : * aOffset Offset of the shadow
74 : * aSigma Sigma used for the guassian filter kernel
75 : * aOperator Composition operator used
76 : */
77 : virtual void DrawSurfaceWithShadow(SourceSurface *aSurface,
78 : const Point &aDest,
79 : const Color &aColor,
80 : const Point &aOffset,
81 : Float aSigma,
82 : CompositionOp aOperator) override;
83 :
84 : /*
85 : * Clear a rectangle on the draw target to transparent black. This will
86 : * respect the clipping region and transform.
87 : *
88 : * aRect Rectangle to clear
89 : */
90 : virtual void ClearRect(const Rect &aRect) override;
91 :
92 : /*
93 : * This is essentially a 'memcpy' between two surfaces. It moves a pixel
94 : * aligned area from the source surface unscaled directly onto the
95 : * drawtarget. This ignores both transform and clip.
96 : *
97 : * aSurface Surface to copy from
98 : * aSourceRect Source rectangle to be copied
99 : * aDest Destination point to copy the surface to
100 : */
101 : virtual void CopySurface(SourceSurface *aSurface,
102 : const IntRect &aSourceRect,
103 : const IntPoint &aDestination) override;
104 :
105 : /*
106 : * Fill a rectangle on the DrawTarget with a certain source pattern.
107 : *
108 : * aRect Rectangle that forms the mask of this filling operation
109 : * aPattern Pattern that forms the source of this filling operation
110 : * aOptions Options that are applied to this operation
111 : */
112 : virtual void FillRect(const Rect &aRect,
113 : const Pattern &aPattern,
114 : const DrawOptions &aOptions = DrawOptions()) override;
115 :
116 : /*
117 : * Stroke a rectangle on the DrawTarget with a certain source pattern.
118 : *
119 : * aRect Rectangle that forms the mask of this stroking operation
120 : * aPattern Pattern that forms the source of this stroking operation
121 : * aOptions Options that are applied to this operation
122 : */
123 : virtual void StrokeRect(const Rect &aRect,
124 : const Pattern &aPattern,
125 : const StrokeOptions &aStrokeOptions = StrokeOptions(),
126 : const DrawOptions &aOptions = DrawOptions()) override;
127 :
128 : /*
129 : * Stroke a line on the DrawTarget with a certain source pattern.
130 : *
131 : * aStart Starting point of the line
132 : * aEnd End point of the line
133 : * aPattern Pattern that forms the source of this stroking operation
134 : * aOptions Options that are applied to this operation
135 : */
136 : virtual void StrokeLine(const Point &aStart,
137 : const Point &aEnd,
138 : const Pattern &aPattern,
139 : const StrokeOptions &aStrokeOptions = StrokeOptions(),
140 : const DrawOptions &aOptions = DrawOptions()) override;
141 :
142 : /*
143 : * Stroke a path on the draw target with a certain source pattern.
144 : *
145 : * aPath Path that is to be stroked
146 : * aPattern Pattern that should be used for the stroke
147 : * aStrokeOptions Stroke options used for this operation
148 : * aOptions Draw options used for this operation
149 : */
150 : virtual void Stroke(const Path *aPath,
151 : const Pattern &aPattern,
152 : const StrokeOptions &aStrokeOptions = StrokeOptions(),
153 : const DrawOptions &aOptions = DrawOptions()) override;
154 :
155 : /*
156 : * Fill a path on the draw target with a certain source pattern.
157 : *
158 : * aPath Path that is to be filled
159 : * aPattern Pattern that should be used for the fill
160 : * aOptions Draw options used for this operation
161 : */
162 : virtual void Fill(const Path *aPath,
163 : const Pattern &aPattern,
164 : const DrawOptions &aOptions = DrawOptions()) override;
165 :
166 : /*
167 : * Fill a series of clyphs on the draw target with a certain source pattern.
168 : */
169 : virtual void FillGlyphs(ScaledFont *aFont,
170 : const GlyphBuffer &aBuffer,
171 : const Pattern &aPattern,
172 : const DrawOptions &aOptions = DrawOptions(),
173 : const GlyphRenderingOptions *aRenderingOptions = nullptr) override;
174 :
175 : /*
176 : * This takes a source pattern and a mask, and composites the source pattern
177 : * onto the destination surface using the alpha channel of the mask pattern
178 : * as a mask for the operation.
179 : *
180 : * aSource Source pattern
181 : * aMask Mask pattern
182 : * aOptions Drawing options
183 : */
184 : virtual void Mask(const Pattern &aSource,
185 : const Pattern &aMask,
186 : const DrawOptions &aOptions = DrawOptions()) override;
187 :
188 : virtual void MaskSurface(const Pattern &aSource,
189 : SourceSurface *aMask,
190 : Point aOffset,
191 : const DrawOptions &aOptions = DrawOptions()) override;
192 :
193 : /*
194 : * Push a clip to the DrawTarget.
195 : *
196 : * aPath The path to clip to
197 : */
198 : virtual void PushClip(const Path *aPath) override;
199 :
200 : /*
201 : * Push an axis-aligned rectangular clip to the DrawTarget. This rectangle
202 : * is specified in user space.
203 : *
204 : * aRect The rect to clip to
205 : */
206 : virtual void PushClipRect(const Rect &aRect) override;
207 :
208 : /* Pop a clip from the DrawTarget. A pop without a corresponding push will
209 : * be ignored.
210 : */
211 : virtual void PopClip() override;
212 :
213 : /**
214 : * Push a 'layer' to the DrawTarget, a layer is a temporary surface that all
215 : * drawing will be redirected to, this is used for example to support group
216 : * opacity or the masking of groups. Clips must be balanced within a layer,
217 : * i.e. between a matching PushLayer/PopLayer pair there must be as many
218 : * PushClip(Rect) calls as there are PopClip calls.
219 : *
220 : * @param aOpaque Whether the layer will be opaque
221 : * @param aOpacity Opacity of the layer
222 : * @param aMask Mask applied to the layer
223 : * @param aMaskTransform Transform applied to the layer mask
224 : * @param aBounds Optional bounds in device space to which the layer is
225 : * limited in size.
226 : * @param aCopyBackground Whether to copy the background into the layer, this
227 : * is only supported when aOpaque is true.
228 : */
229 : virtual void PushLayer(bool aOpaque, Float aOpacity,
230 : SourceSurface* aMask,
231 : const Matrix& aMaskTransform,
232 : const IntRect& aBounds = IntRect(),
233 : bool aCopyBackground = false) override;
234 :
235 : /**
236 : * This balances a call to PushLayer and proceeds to blend the layer back
237 : * onto the background. This blend will blend the temporary surface back
238 : * onto the target in device space using POINT sampling and operator over.
239 : */
240 : virtual void PopLayer() override;
241 :
242 : /*
243 : * Create a SourceSurface optimized for use with this DrawTarget from
244 : * existing bitmap data in memory.
245 : *
246 : * The SourceSurface does not take ownership of aData, and may be freed at any time.
247 : */
248 : virtual already_AddRefed<SourceSurface> CreateSourceSurfaceFromData(unsigned char *aData,
249 : const IntSize &aSize,
250 : int32_t aStride,
251 : SurfaceFormat aFormat) const override;
252 :
253 : /*
254 : * Create a SourceSurface optimized for use with this DrawTarget from
255 : * an arbitrary other SourceSurface. This may return aSourceSurface or some
256 : * other existing surface.
257 : */
258 : virtual already_AddRefed<SourceSurface> OptimizeSourceSurface(SourceSurface *aSurface) const override;
259 :
260 : /*
261 : * Create a SourceSurface for a type of NativeSurface. This may fail if the
262 : * draw target does not know how to deal with the type of NativeSurface passed
263 : * in.
264 : */
265 : virtual already_AddRefed<SourceSurface>
266 : CreateSourceSurfaceFromNativeSurface(const NativeSurface &aSurface) const override;
267 :
268 : /*
269 : * Create a DrawTarget whose snapshot is optimized for use with this DrawTarget.
270 : */
271 : virtual already_AddRefed<DrawTarget>
272 : CreateSimilarDrawTarget(const IntSize &aSize, SurfaceFormat aFormat) const override;
273 :
274 : /*
275 : * Create a path builder with the specified fillmode.
276 : *
277 : * We need the fill mode up front because of Direct2D.
278 : * ID2D1SimplifiedGeometrySink requires the fill mode
279 : * to be set before calling BeginFigure().
280 : */
281 : virtual already_AddRefed<PathBuilder> CreatePathBuilder(FillRule aFillRule = FillRule::FILL_WINDING) const override;
282 :
283 : /*
284 : * Create a GradientStops object that holds information about a set of
285 : * gradient stops, this object is required for linear or radial gradient
286 : * patterns to represent the color stops in the gradient.
287 : *
288 : * aStops An array of gradient stops
289 : * aNumStops Number of stops in the array aStops
290 : * aExtendNone This describes how to extend the stop color outside of the
291 : * gradient area.
292 : */
293 : virtual already_AddRefed<GradientStops>
294 : CreateGradientStops(GradientStop *aStops,
295 : uint32_t aNumStops,
296 : ExtendMode aExtendMode = ExtendMode::CLAMP) const override;
297 :
298 : virtual already_AddRefed<FilterNode> CreateFilter(FilterType aType) override;
299 :
300 : /*
301 : * Set a transform on the surface, this transform is applied at drawing time
302 : * to both the mask and source of the operation.
303 : */
304 : virtual void SetTransform(const Matrix &aTransform) override;
305 :
306 : /* Tries to get a native surface for a DrawTarget, this may fail if the
307 : * draw target cannot convert to this surface type.
308 : */
309 0 : virtual void *GetNativeSurface(NativeSurfaceType aType) override { return mFinalDT->GetNativeSurface(aType); }
310 :
311 0 : virtual bool IsCurrentGroupOpaque() override {
312 0 : return mFinalDT->IsCurrentGroupOpaque();
313 : }
314 :
315 : private:
316 : /**
317 : * Used for creating a DrawTargetWrapAndRecord for a CreateSimilarDrawTarget call.
318 : * We have to call CreateSimilarDrawTarget on mFinalDT up front and pass it in
319 : * as it can fail.
320 : *
321 : * @param aDT DrawTargetWrapAndRecord on which CreateSimilarDrawTarget was called
322 : * @param aSimilarDT Similar DrawTarget created from aDT.mFinalDT.
323 : */
324 : DrawTargetWrapAndRecord(const DrawTargetWrapAndRecord *aDT,
325 : DrawTarget *aSimilarDT);
326 :
327 : Path *GetPathForPathRecording(const Path *aPath) const;
328 : already_AddRefed<PathRecording> EnsurePathStored(const Path *aPath);
329 : void EnsurePatternDependenciesStored(const Pattern &aPattern);
330 :
331 : RefPtr<DrawEventRecorderPrivate> mRecorder;
332 : RefPtr<DrawTarget> mFinalDT;
333 : };
334 :
335 : } // namespace gfx
336 : } // namespace mozilla
337 :
338 : #endif /* MOZILLA_GFX_DRAWTARGETWRAPANDRECORD_H_ */
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