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
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrInOrderDrawBuffer_DEFINED
#define GrInOrderDrawBuffer_DEFINED
#include "GrDrawTarget.h"
#include "GrAllocPool.h"
#include "GrAllocator.h"
#include "GrPath.h"
#include "SkClipStack.h"
#include "SkStrokeRec.h"
#include "SkTemplates.h"
class GrGpu;
class GrIndexBufferAllocPool;
class GrVertexBufferAllocPool;
/**
* GrInOrderDrawBuffer is an implementation of GrDrawTarget that queues up draws for eventual
* playback into a GrGpu. In theory one draw buffer could playback into another. When index or
* vertex buffers are used as geometry sources it is the callers the draw buffer only holds
* references to the buffers. It is the callers responsibility to ensure that the data is still
* valid when the draw buffer is played back into a GrGpu. Similarly, it is the caller's
* responsibility to ensure that all referenced textures, buffers, and render-targets are associated
* in the GrGpu object that the buffer is played back into. The buffer requires VB and IB pools to
* store geometry.
*/
class GrInOrderDrawBuffer : public GrDrawTarget {
public:
/**
* Creates a GrInOrderDrawBuffer
*
* @param gpu the gpu object that this draw buffer flushes to.
* @param vertexPool pool where vertices for queued draws will be saved when
* the vertex source is either reserved or array.
* @param indexPool pool where indices for queued draws will be saved when
* the index source is either reserved or array.
*/
GrInOrderDrawBuffer(GrGpu* gpu,
GrVertexBufferAllocPool* vertexPool,
GrIndexBufferAllocPool* indexPool);
virtual ~GrInOrderDrawBuffer();
/**
* Empties the draw buffer of any queued up draws. This must not be called while inside an
* unbalanced pushGeometrySource(). The current draw state and clip are preserved.
*/
void reset();
/**
* This plays the queued up draws to its GrGpu target. It also resets this object (i.e. flushing
* is destructive). This buffer must not have an active reserved vertex or index source. Any
* reserved geometry on the target will be finalized because it's geometry source will be pushed
* before flushing and popped afterwards.
*
* @return false if the playback trivially drew nothing because nothing was recorded.
*/
bool flush();
bool isFlushing() const { return fFlushing; }
// overrides from GrDrawTarget
virtual bool geometryHints(int* vertexCount,
int* indexCount) const SK_OVERRIDE;
virtual void clear(const GrIRect* rect,
GrColor color,
GrRenderTarget* renderTarget = NULL) SK_OVERRIDE;
virtual void initCopySurfaceDstDesc(const GrSurface* src, GrTextureDesc* desc) SK_OVERRIDE;
protected:
virtual void clipWillBeSet(const GrClipData* newClip) SK_OVERRIDE;
private:
enum Cmd {
kDraw_Cmd = 1,
kStencilPath_Cmd = 2,
kSetState_Cmd = 3,
kSetClip_Cmd = 4,
kClear_Cmd = 5,
kCopySurface_Cmd = 6,
};
class DrawRecord : public DrawInfo {
public:
DrawRecord(const DrawInfo& info) : DrawInfo(info) {}
const GrVertexBuffer* fVertexBuffer;
const GrIndexBuffer* fIndexBuffer;
};
struct StencilPath : GrNoncopyable {
StencilPath();
SkAutoTUnref<const GrPath> fPath;
SkStrokeRec fStroke;
SkPath::FillType fFill;
};
struct Clear : GrNoncopyable {
Clear() : fRenderTarget(NULL) {}
~Clear() { GrSafeUnref(fRenderTarget); }
GrIRect fRect;
GrColor fColor;
GrRenderTarget* fRenderTarget;
};
struct CopySurface : GrNoncopyable {
SkAutoTUnref<GrSurface> fDst;
SkAutoTUnref<GrSurface> fSrc;
SkIRect fSrcRect;
SkIPoint fDstPoint;
};
// overrides from GrDrawTarget
virtual void onDraw(const DrawInfo&) SK_OVERRIDE;
virtual void onDrawRect(const GrRect& rect,
const SkMatrix* matrix,
const GrRect* localRect,
const SkMatrix* localMatrix) SK_OVERRIDE;
virtual void onStencilPath(const GrPath*, const SkStrokeRec& stroke, SkPath::FillType) SK_OVERRIDE;
virtual bool onReserveVertexSpace(size_t vertexSize,
int vertexCount,
void** vertices) SK_OVERRIDE;
virtual bool onReserveIndexSpace(int indexCount,
void** indices) SK_OVERRIDE;
virtual void releaseReservedVertexSpace() SK_OVERRIDE;
virtual void releaseReservedIndexSpace() SK_OVERRIDE;
virtual void onSetVertexSourceToArray(const void* vertexArray,
int vertexCount) SK_OVERRIDE;
virtual void onSetIndexSourceToArray(const void* indexArray,
int indexCount) SK_OVERRIDE;
virtual void releaseVertexArray() SK_OVERRIDE;
virtual void releaseIndexArray() SK_OVERRIDE;
virtual void geometrySourceWillPush() SK_OVERRIDE;
virtual void geometrySourceWillPop(const GeometrySrcState& restoredState) SK_OVERRIDE;
virtual void willReserveVertexAndIndexSpace(int vertexCount,
int indexCount) SK_OVERRIDE;
virtual bool onCopySurface(GrSurface* dst,
GrSurface* src,
const SkIRect& srcRect,
const SkIPoint& dstPoint) SK_OVERRIDE;
virtual bool onCanCopySurface(GrSurface* dst,
GrSurface* src,
const SkIRect& srcRect,
const SkIPoint& dstPoint) SK_OVERRIDE;
bool quickInsideClip(const SkRect& devBounds);
// Attempts to concat instances from info onto the previous draw. info must represent an
// instanced draw. The caller must have already recorded a new draw state and clip if necessary.
int concatInstancedDraw(const DrawInfo& info);
// we lazily record state and clip changes in order to skip clips and states that have no
// effect.
bool needsNewState() const;
bool needsNewClip() const;
// these functions record a command
void recordState();
void recordClip();
DrawRecord* recordDraw(const DrawInfo&);
StencilPath* recordStencilPath();
Clear* recordClear();
CopySurface* recordCopySurface();
// TODO: Use a single allocator for commands and records
enum {
kCmdPreallocCnt = 32,
kDrawPreallocCnt = 8,
kStencilPathPreallocCnt = 8,
kStatePreallocCnt = 8,
kClipPreallocCnt = 8,
kClearPreallocCnt = 4,
kGeoPoolStatePreAllocCnt = 4,
kCopySurfacePreallocCnt = 4,
};
SkSTArray<kCmdPreallocCnt, uint8_t, true> fCmds;
GrSTAllocator<kDrawPreallocCnt, DrawRecord> fDraws;
GrSTAllocator<kStatePreallocCnt, StencilPath> fStencilPaths;
GrSTAllocator<kStatePreallocCnt, GrDrawState::DeferredState> fStates;
GrSTAllocator<kClearPreallocCnt, Clear> fClears;
GrSTAllocator<kCopySurfacePreallocCnt, CopySurface> fCopySurfaces;
GrSTAllocator<kClipPreallocCnt, SkClipStack> fClips;
GrSTAllocator<kClipPreallocCnt, SkIPoint> fClipOrigins;
GrDrawTarget* fDstGpu;
bool fClipSet;
enum ClipProxyState {
kUnknown_ClipProxyState,
kValid_ClipProxyState,
kInvalid_ClipProxyState
};
ClipProxyState fClipProxyState;
SkRect fClipProxy;
GrVertexBufferAllocPool& fVertexPool;
GrIndexBufferAllocPool& fIndexPool;
struct GeometryPoolState {
const GrVertexBuffer* fPoolVertexBuffer;
int fPoolStartVertex;
const GrIndexBuffer* fPoolIndexBuffer;
int fPoolStartIndex;
// caller may conservatively over reserve vertices / indices.
// we release unused space back to allocator if possible
// can only do this if there isn't an intervening pushGeometrySource()
size_t fUsedPoolVertexBytes;
size_t fUsedPoolIndexBytes;
};
SkSTArray<kGeoPoolStatePreAllocCnt, GeometryPoolState> fGeoPoolStateStack;
bool fFlushing;
typedef GrDrawTarget INHERITED;
};
#endif
|
