1 /*
2 * Copyright 2014 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "src/gpu/GrPrimitiveProcessor.h"
9
10 #include "src/gpu/GrCoordTransform.h"
11
12 /**
13 * We specialize the vertex code for each of these matrix types.
14 */
15 enum MatrixType {
16 kNoPersp_MatrixType = 0,
17 kGeneral_MatrixType = 1,
18 };
19
GrPrimitiveProcessor(ClassID classID)20 GrPrimitiveProcessor::GrPrimitiveProcessor(ClassID classID) : GrProcessor(classID) {}
21
textureSampler(int i) const22 const GrPrimitiveProcessor::TextureSampler& GrPrimitiveProcessor::textureSampler(int i) const {
23 SkASSERT(i >= 0 && i < this->numTextureSamplers());
24 return this->onTextureSampler(i);
25 }
26
27 uint32_t
getTransformKey(const SkTArray<const GrCoordTransform *,true> & coords,int numCoords) const28 GrPrimitiveProcessor::getTransformKey(const SkTArray<const GrCoordTransform*, true>& coords,
29 int numCoords) const {
30 uint32_t totalKey = 0;
31 for (int t = 0; t < numCoords; ++t) {
32 uint32_t key = 0;
33 const GrCoordTransform* coordTransform = coords[t];
34 if (coordTransform->getMatrix().hasPerspective()) {
35 key |= kGeneral_MatrixType;
36 } else {
37 key |= kNoPersp_MatrixType;
38 }
39 key <<= t;
40 SkASSERT(0 == (totalKey & key)); // keys for each transform ought not to overlap
41 totalKey |= key;
42 }
43 return totalKey;
44 }
45
46 ///////////////////////////////////////////////////////////////////////////////////////////////////
47
clamp_filter(GrTextureType type,GrSamplerState::Filter requestedFilter)48 static inline GrSamplerState::Filter clamp_filter(GrTextureType type,
49 GrSamplerState::Filter requestedFilter) {
50 if (GrTextureTypeHasRestrictedSampling(type)) {
51 return SkTMin(requestedFilter, GrSamplerState::Filter::kBilerp);
52 }
53 return requestedFilter;
54 }
55
TextureSampler(GrTextureType textureType,const GrSamplerState & samplerState,const GrSwizzle & swizzle,uint32_t extraSamplerKey)56 GrPrimitiveProcessor::TextureSampler::TextureSampler(GrTextureType textureType,
57 const GrSamplerState& samplerState,
58 const GrSwizzle& swizzle,
59 uint32_t extraSamplerKey) {
60 this->reset(textureType, samplerState, swizzle, extraSamplerKey);
61 }
62
TextureSampler(GrTextureType textureType,GrSamplerState::Filter filterMode,GrSamplerState::WrapMode wrapXAndY,const GrSwizzle & swizzle)63 GrPrimitiveProcessor::TextureSampler::TextureSampler(GrTextureType textureType,
64 GrSamplerState::Filter filterMode,
65 GrSamplerState::WrapMode wrapXAndY,
66 const GrSwizzle& swizzle) {
67 this->reset(textureType, filterMode, wrapXAndY, swizzle);
68 }
69
reset(GrTextureType textureType,const GrSamplerState & samplerState,const GrSwizzle & swizzle,uint32_t extraSamplerKey)70 void GrPrimitiveProcessor::TextureSampler::reset(GrTextureType textureType,
71 const GrSamplerState& samplerState,
72 const GrSwizzle& swizzle,
73 uint32_t extraSamplerKey) {
74 fSamplerState = samplerState;
75 fSamplerState.setFilterMode(clamp_filter(textureType, samplerState.filter()));
76 fSwizzle = swizzle;
77 fTextureType = textureType;
78 fExtraSamplerKey = extraSamplerKey;
79 fIsInitialized = true;
80 }
81
reset(GrTextureType textureType,GrSamplerState::Filter filterMode,GrSamplerState::WrapMode wrapXAndY,const GrSwizzle & swizzle)82 void GrPrimitiveProcessor::TextureSampler::reset(GrTextureType textureType,
83 GrSamplerState::Filter filterMode,
84 GrSamplerState::WrapMode wrapXAndY,
85 const GrSwizzle& swizzle) {
86 filterMode = clamp_filter(textureType, filterMode);
87 fSamplerState = GrSamplerState(wrapXAndY, filterMode);
88 fSwizzle = swizzle;
89 fTextureType = textureType;
90 fIsInitialized = true;
91 }
92