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
|
/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrMesh_DEFINED
#define GrMesh_DEFINED
#include "GrBuffer.h"
#include "GrGpuResourceRef.h"
class GrPrimitiveProcessor;
/**
* Used to communicate index and vertex buffers, counts, and offsets for a draw from GrOp to
* GrGpu. It also holds the primitive type for the draw. TODO: Consider moving ownership of this
* and draw-issuing responsibility to GrPrimitiveProcessor. The rest of the vertex info lives there
* already (stride, attribute mappings).
*/
class GrMesh {
public:
GrMesh(GrPrimitiveType primitiveType)
: fPrimitiveType(primitiveType)
, fBaseVertex(0) {
SkDEBUGCODE(fNonIndexNonInstanceData.fVertexCount = -1;)
}
GrPrimitiveType primitiveType() const { return fPrimitiveType; }
bool isIndexed() const { return SkToBool(fIndexBuffer.get()); }
bool isInstanced() const { return SkToBool(fInstanceBuffer.get()); }
bool hasVertexData() const { return SkToBool(fVertexBuffer.get()); }
void setNonIndexedNonInstanced(int vertexCount);
void setIndexed(const GrBuffer* indexBuffer, int indexCount, int baseIndex,
uint16_t minIndexValue, uint16_t maxIndexValue);
void setIndexedPatterned(const GrBuffer* indexBuffer, int indexCount, int vertexCount,
int patternRepeatCount, int maxPatternRepetitionsInIndexBuffer);
void setInstanced(const GrBuffer* instanceBuffer, int instanceCount, int baseInstance,
int vertexCount);
void setIndexedInstanced(const GrBuffer* indexBuffer, int indexCount,
const GrBuffer* instanceBuffer, int instanceCount, int baseInstance=0);
void setVertexData(const GrBuffer* vertexBuffer, int baseVertex = 0);
class SendToGpuImpl {
public:
virtual void sendMeshToGpu(const GrPrimitiveProcessor&, GrPrimitiveType,
const GrBuffer* vertexBuffer, int vertexCount,
int baseVertex) = 0;
virtual void sendIndexedMeshToGpu(const GrPrimitiveProcessor&, GrPrimitiveType,
const GrBuffer* indexBuffer, int indexCount,
int baseIndex, uint16_t minIndexValue,
uint16_t maxIndexValue, const GrBuffer* vertexBuffer,
int baseVertex) = 0;
virtual void sendInstancedMeshToGpu(const GrPrimitiveProcessor&, GrPrimitiveType,
const GrBuffer* vertexBuffer, int vertexCount,
int baseVertex, const GrBuffer* instanceBuffer,
int instanceCount, int baseInstance) = 0;
virtual void sendIndexedInstancedMeshToGpu(const GrPrimitiveProcessor&, GrPrimitiveType,
const GrBuffer* indexBuffer, int indexCount,
int baseIndex, const GrBuffer* vertexBuffer,
int baseVertex, const GrBuffer* instanceBuffer,
int instanceCount, int baseInstance) = 0;
virtual ~SendToGpuImpl() {}
};
void sendToGpu(const GrPrimitiveProcessor&, SendToGpuImpl*) const;
struct PatternBatch;
private:
using PendingBuffer = GrPendingIOResource<const GrBuffer, kRead_GrIOType>;
GrPrimitiveType fPrimitiveType;
PendingBuffer fIndexBuffer;
PendingBuffer fInstanceBuffer;
PendingBuffer fVertexBuffer;
int fBaseVertex;
union {
struct { // When fIndexBuffer == nullptr and fInstanceBuffer == nullptr.
int fVertexCount;
} fNonIndexNonInstanceData;
struct { // When fIndexBuffer != nullptr and fInstanceBuffer == nullptr.
struct {
int fIndexCount;
int fPatternRepeatCount;
} fIndexData;
union {
struct { // When fPatternRepeatCount == 0.
int fBaseIndex;
uint16_t fMinIndexValue;
uint16_t fMaxIndexValue;
} fNonPatternIndexData;
struct { // When fPatternRepeatCount != 0.
int fVertexCount;
int fMaxPatternRepetitionsInIndexBuffer;
} fPatternData;
};
};
struct { // When fInstanceBuffer != nullptr.
struct {
int fInstanceCount;
int fBaseInstance;
} fInstanceData;
union { // When fIndexBuffer == nullptr.
struct {
int fVertexCount;
} fInstanceNonIndexData;
struct { // When fIndexBuffer != nullptr.
int fIndexCount;
} fInstanceIndexData;
};
};
};
};
inline void GrMesh::setNonIndexedNonInstanced(int vertexCount) {
fIndexBuffer.reset(nullptr);
fInstanceBuffer.reset(nullptr);
fNonIndexNonInstanceData.fVertexCount = vertexCount;
}
inline void GrMesh::setIndexed(const GrBuffer* indexBuffer, int indexCount, int baseIndex,
uint16_t minIndexValue, uint16_t maxIndexValue) {
SkASSERT(indexBuffer);
SkASSERT(indexCount >= 1);
SkASSERT(baseIndex >= 0);
SkASSERT(maxIndexValue > minIndexValue);
fIndexBuffer.reset(indexBuffer);
fInstanceBuffer.reset(nullptr);
fIndexData.fIndexCount = indexCount;
fIndexData.fPatternRepeatCount = 0;
fNonPatternIndexData.fBaseIndex = baseIndex;
fNonPatternIndexData.fMinIndexValue = minIndexValue;
fNonPatternIndexData.fMaxIndexValue = maxIndexValue;
}
inline void GrMesh::setIndexedPatterned(const GrBuffer* indexBuffer, int indexCount,
int vertexCount, int patternRepeatCount,
int maxPatternRepetitionsInIndexBuffer) {
SkASSERT(indexBuffer);
SkASSERT(indexCount >= 1);
SkASSERT(vertexCount >= 1);
SkASSERT(patternRepeatCount >= 1);
SkASSERT(maxPatternRepetitionsInIndexBuffer >= 1);
fIndexBuffer.reset(indexBuffer);
fInstanceBuffer.reset(nullptr);
fIndexData.fIndexCount = indexCount;
fIndexData.fPatternRepeatCount = patternRepeatCount;
fPatternData.fVertexCount = vertexCount;
fPatternData.fMaxPatternRepetitionsInIndexBuffer = maxPatternRepetitionsInIndexBuffer;
}
inline void GrMesh::setInstanced(const GrBuffer* instanceBuffer, int instanceCount,
int baseInstance, int vertexCount) {
SkASSERT(instanceBuffer);
SkASSERT(instanceCount >= 1);
SkASSERT(baseInstance >= 0);
fIndexBuffer.reset(nullptr);
fInstanceBuffer.reset(instanceBuffer);
fInstanceData.fInstanceCount = instanceCount;
fInstanceData.fBaseInstance = baseInstance;
fInstanceNonIndexData.fVertexCount = vertexCount;
}
inline void GrMesh::setIndexedInstanced(const GrBuffer* indexBuffer, int indexCount,
const GrBuffer* instanceBuffer, int instanceCount,
int baseInstance) {
SkASSERT(indexBuffer);
SkASSERT(indexCount >= 1);
SkASSERT(instanceBuffer);
SkASSERT(instanceCount >= 1);
SkASSERT(baseInstance >= 0);
fIndexBuffer.reset(indexBuffer);
fInstanceBuffer.reset(instanceBuffer);
fInstanceData.fInstanceCount = instanceCount;
fInstanceData.fBaseInstance = baseInstance;
fInstanceIndexData.fIndexCount = indexCount;
}
inline void GrMesh::setVertexData(const GrBuffer* vertexBuffer, int baseVertex) {
SkASSERT(baseVertex >= 0);
fVertexBuffer.reset(vertexBuffer);
fBaseVertex = baseVertex;
}
inline void GrMesh::sendToGpu(const GrPrimitiveProcessor& primProc, SendToGpuImpl* impl) const {
if (this->isInstanced()) {
if (!this->isIndexed()) {
impl->sendInstancedMeshToGpu(primProc, fPrimitiveType, fVertexBuffer.get(),
fInstanceNonIndexData.fVertexCount, fBaseVertex,
fInstanceBuffer.get(), fInstanceData.fInstanceCount,
fInstanceData.fBaseInstance);
} else {
impl->sendIndexedInstancedMeshToGpu(primProc, fPrimitiveType, fIndexBuffer.get(),
fInstanceIndexData.fIndexCount, 0,
fVertexBuffer.get(), fBaseVertex,
fInstanceBuffer.get(), fInstanceData.fInstanceCount,
fInstanceData.fBaseInstance);
}
return;
}
if (!this->isIndexed()) {
SkASSERT(fNonIndexNonInstanceData.fVertexCount > 0);
impl->sendMeshToGpu(primProc, fPrimitiveType, fVertexBuffer.get(),
fNonIndexNonInstanceData.fVertexCount, fBaseVertex);
return;
}
if (0 == fIndexData.fPatternRepeatCount) {
impl->sendIndexedMeshToGpu(primProc, fPrimitiveType, fIndexBuffer.get(),
fIndexData.fIndexCount, fNonPatternIndexData.fBaseIndex,
fNonPatternIndexData.fMinIndexValue,
fNonPatternIndexData.fMaxIndexValue, fVertexBuffer.get(),
fBaseVertex);
return;
}
SkASSERT(fIndexData.fPatternRepeatCount > 0);
int baseRepetition = 0;
do {
int repeatCount = SkTMin(fPatternData.fMaxPatternRepetitionsInIndexBuffer,
fIndexData.fPatternRepeatCount - baseRepetition);
// A patterned index buffer must contain indices in the range [0..vertexCount].
int minIndexValue = 0;
int maxIndexValue = fPatternData.fVertexCount * repeatCount - 1;
impl->sendIndexedMeshToGpu(primProc, fPrimitiveType, fIndexBuffer.get(),
fIndexData.fIndexCount * repeatCount, 0, minIndexValue,
maxIndexValue, fVertexBuffer.get(),
fBaseVertex + fPatternData.fVertexCount * baseRepetition);
baseRepetition += repeatCount;
} while (baseRepetition < fIndexData.fPatternRepeatCount);
}
#endif
|
