blob: b981977af3746a3f27b08a2e145bb808607ccc62 (
plain)
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
|
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "GrPrimitiveProcessor.h"
#include "GrCoordTransform.h"
/**
* The key for an individual coord transform is made up of a matrix type, and a bit that indicates
* the source of the input coords.
*/
enum {
kMatrixTypeKeyBits = 1,
kPositionCoords_Flag = 1 << kMatrixTypeKeyBits,
kTransformKeyBits = kMatrixTypeKeyBits + 1,
};
/**
* We specialize the vertex code for each of these matrix types.
*/
enum MatrixType {
kNoPersp_MatrixType = 0,
kGeneral_MatrixType = 1,
};
uint32_t
GrPrimitiveProcessor::getTransformKey(const SkTArray<const GrCoordTransform*, true>& coords,
int numCoords) const {
uint32_t totalKey = 0;
for (int t = 0; t < numCoords; ++t) {
uint32_t key = 0;
const GrCoordTransform* coordTransform = coords[t];
if (coordTransform->getMatrix().hasPerspective()) {
key |= kGeneral_MatrixType;
} else {
key |= kNoPersp_MatrixType;
}
if (!this->hasExplicitLocalCoords()) {
key |= kPositionCoords_Flag;
}
key <<= kTransformKeyBits * t;
SkASSERT(0 == (totalKey & key)); // keys for each transform ought not to overlap
totalKey |= key;
}
return totalKey;
}
|
