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
|
/*
* Copyright 2010 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrBatchedTextContext.h"
#include "GrContext.h"
#include "GrDrawTarget.h"
#include "GrIndexBuffer.h"
#include "GrTextContext.h"
GrBatchedTextContext::GrBatchedTextContext() {
}
GrBatchedTextContext::~GrBatchedTextContext() {
}
void GrBatchedTextContext::init(GrContext* context,
const GrPaint& grPaint,
const GrMatrix* extMatrix) {
this->INHERITED::init(context, grPaint, extMatrix);
fGrPaint = grPaint;
fDrawTarget = NULL;
fMaxVertices = 0;
fCurrTexture = NULL;
fCurrVertex = 0;
}
void GrBatchedTextContext::finish() {
GrAssert(fDrawTarget);
if (fDrawTarget) {
fDrawTarget->drawState()->disableStages();
}
fDrawTarget = NULL;
this->INHERITED::finish();
}
void GrBatchedTextContext::reset() {
GrAssert(this->isValid());
GrAssert(fDrawTarget);
fDrawTarget->resetVertexSource();
fMaxVertices = 0;
fCurrVertex = 0;
GrSafeSetNull(fCurrTexture);
}
void GrBatchedTextContext::prepareForGlyph(GrTexture* texture) {
GrAssert(this->isValid());
GrAssert(texture);
if (fCurrTexture != texture || fCurrVertex + 4 > fMaxVertices) {
this->flush();
fCurrTexture = texture;
fCurrTexture->ref();
}
}
void GrBatchedTextContext::setupVertexBuff(void** vertexBuff,
GrVertexLayout vertexLayout) {
GrAssert(this->isValid());
GrAssert(fDrawTarget);
if (NULL == *vertexBuff) {
// If we need to reserve vertices allow the draw target to suggest
// a number of verts to reserve and whether to perform a flush.
fMaxVertices = kMinRequestedVerts;
bool flush = fDrawTarget->geometryHints(vertexLayout,
&fMaxVertices,
NULL);
if (flush) {
this->flush();
fContext->flush();
fDrawTarget = fContext->getTextTarget(fGrPaint);
fMaxVertices = kDefaultRequestedVerts;
// ignore return, no point in flushing again.
fDrawTarget->geometryHints(vertexLayout,
&fMaxVertices,
NULL);
}
int maxQuadVertices = 4 * fContext->getQuadIndexBuffer()->maxQuads();
if (fMaxVertices < kMinRequestedVerts) {
fMaxVertices = kDefaultRequestedVerts;
} else if (fMaxVertices > maxQuadVertices) {
// don't exceed the limit of the index buffer
fMaxVertices = maxQuadVertices;
}
bool success = fDrawTarget->reserveVertexAndIndexSpace(
vertexLayout,
fMaxVertices,
0,
vertexBuff,
NULL);
GrAlwaysAssert(success);
}
}
|
