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
|
/*
* 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 "GrSwizzle.h"
#include "glsl/GrGLSLShaderBuilder.h"
#include "glsl/GrGLSLCaps.h"
#include "glsl/GrGLSLShaderVar.h"
#include "glsl/GrGLSLSampler.h"
#include "glsl/GrGLSLProgramBuilder.h"
GrGLSLShaderBuilder::GrGLSLShaderBuilder(GrGLSLProgramBuilder* program)
: fProgramBuilder(program)
, fInputs(GrGLSLProgramBuilder::kVarsPerBlock)
, fOutputs(GrGLSLProgramBuilder::kVarsPerBlock)
, fFeaturesAddedMask(0)
, fCodeIndex(kCode)
, fFinalized(false) {
// We push back some dummy pointers which will later become our header
for (int i = 0; i <= kCode; i++) {
fShaderStrings.push_back();
fCompilerStrings.push_back(nullptr);
fCompilerStringLengths.push_back(0);
}
this->main() = "void main() {";
}
void GrGLSLShaderBuilder::declAppend(const GrGLSLShaderVar& var) {
SkString tempDecl;
var.appendDecl(fProgramBuilder->glslCaps(), &tempDecl);
this->codeAppendf("%s;", tempDecl.c_str());
}
void GrGLSLShaderBuilder::appendPrecisionModifier(GrSLPrecision precision) {
if (fProgramBuilder->glslCaps()->usesPrecisionModifiers()) {
this->codeAppendf("%s ", GrGLSLPrecisionString(precision));
}
}
void GrGLSLShaderBuilder::emitFunction(GrSLType returnType,
const char* name,
int argCnt,
const GrGLSLShaderVar* args,
const char* body,
SkString* outName) {
this->functions().append(GrGLSLTypeString(returnType));
fProgramBuilder->nameVariable(outName, '\0', name);
this->functions().appendf(" %s", outName->c_str());
this->functions().append("(");
for (int i = 0; i < argCnt; ++i) {
args[i].appendDecl(fProgramBuilder->glslCaps(), &this->functions());
if (i < argCnt - 1) {
this->functions().append(", ");
}
}
this->functions().append(") {\n");
this->functions().append(body);
this->functions().append("}\n\n");
}
void GrGLSLShaderBuilder::appendTextureLookup(SkString* out,
SamplerHandle samplerHandle,
const char* coordName,
GrSLType varyingType) const {
const GrGLSLCaps* glslCaps = fProgramBuilder->glslCaps();
const GrGLSLSampler& sampler = fProgramBuilder->getSampler(samplerHandle);
GrSLType samplerType = sampler.type();
if (samplerType == kSampler2DRect_GrSLType) {
if (varyingType == kVec2f_GrSLType) {
out->appendf("%s(%s, textureSize(%s) * %s)",
GrGLSLTexture2DFunctionName(varyingType, samplerType,
glslCaps->generation()),
sampler.getSamplerNameForTexture2D(),
sampler.getSamplerNameForTexture2D(),
coordName);
} else {
out->appendf("%s(%s, vec3(textureSize(%s) * %s.xy, %s.z))",
GrGLSLTexture2DFunctionName(varyingType, samplerType,
glslCaps->generation()),
sampler.getSamplerNameForTexture2D(),
sampler.getSamplerNameForTexture2D(),
coordName,
coordName);
}
} else {
out->appendf("%s(%s, %s)",
GrGLSLTexture2DFunctionName(varyingType, samplerType, glslCaps->generation()),
sampler.getSamplerNameForTexture2D(),
coordName);
}
this->appendTextureSwizzle(out, sampler.config());
}
void GrGLSLShaderBuilder::appendTextureLookup(SamplerHandle samplerHandle,
const char* coordName,
GrSLType varyingType) {
this->appendTextureLookup(&this->code(), samplerHandle, coordName, varyingType);
}
void GrGLSLShaderBuilder::appendTextureLookupAndModulate(const char* modulation,
SamplerHandle samplerHandle,
const char* coordName,
GrSLType varyingType) {
SkString lookup;
this->appendTextureLookup(&lookup, samplerHandle, coordName, varyingType);
this->codeAppend((GrGLSLExpr4(modulation) * GrGLSLExpr4(lookup)).c_str());
}
void GrGLSLShaderBuilder::appendTexelFetch(SkString* out,
SamplerHandle samplerHandle,
const char* coordExpr) const {
const GrGLSLSampler& sampler = fProgramBuilder->getSampler(samplerHandle);
SkASSERT(fProgramBuilder->glslCaps()->texelFetchSupport());
SkASSERT(GrSLTypeIsSamplerType(sampler.type()));
out->appendf("texelFetch(%s, %s)", sampler.getSamplerNameForTexelFetch(), coordExpr);
this->appendTextureSwizzle(out, sampler.config());
}
void GrGLSLShaderBuilder::appendTexelFetch(SamplerHandle samplerHandle, const char* coordExpr) {
this->appendTexelFetch(&this->code(), samplerHandle, coordExpr);
}
void GrGLSLShaderBuilder::appendTextureSwizzle(SkString* out, GrPixelConfig config) const {
const GrSwizzle& configSwizzle = fProgramBuilder->glslCaps()->configTextureSwizzle(config);
if (configSwizzle != GrSwizzle::RGBA()) {
out->appendf(".%s", configSwizzle.c_str());
}
}
bool GrGLSLShaderBuilder::addFeature(uint32_t featureBit, const char* extensionName) {
if (featureBit & fFeaturesAddedMask) {
return false;
}
this->extensions().appendf("#extension %s: require\n", extensionName);
fFeaturesAddedMask |= featureBit;
return true;
}
void GrGLSLShaderBuilder::appendDecls(const VarArray& vars, SkString* out) const {
for (int i = 0; i < vars.count(); ++i) {
vars[i].appendDecl(fProgramBuilder->glslCaps(), out);
out->append(";\n");
}
}
void GrGLSLShaderBuilder::addLayoutQualifier(const char* param, InterfaceQualifier interface) {
SkASSERT(fProgramBuilder->glslCaps()->generation() >= k330_GrGLSLGeneration ||
fProgramBuilder->glslCaps()->mustEnableAdvBlendEqs());
fLayoutParams[interface].push_back() = param;
}
void GrGLSLShaderBuilder::compileAndAppendLayoutQualifiers() {
static const char* interfaceQualifierNames[] = {
"out"
};
for (int interface = 0; interface <= kLastInterfaceQualifier; ++interface) {
const SkTArray<SkString>& params = fLayoutParams[interface];
if (params.empty()) {
continue;
}
this->layoutQualifiers().appendf("layout(%s", params[0].c_str());
for (int i = 1; i < params.count(); ++i) {
this->layoutQualifiers().appendf(", %s", params[i].c_str());
}
this->layoutQualifiers().appendf(") %s;\n", interfaceQualifierNames[interface]);
}
GR_STATIC_ASSERT(0 == GrGLSLShaderBuilder::kOut_InterfaceQualifier);
GR_STATIC_ASSERT(SK_ARRAY_COUNT(interfaceQualifierNames) == kLastInterfaceQualifier + 1);
}
void GrGLSLShaderBuilder::finalize(uint32_t visibility) {
SkASSERT(!fFinalized);
this->versionDecl() = fProgramBuilder->glslCaps()->versionDeclString();
this->compileAndAppendLayoutQualifiers();
SkASSERT(visibility);
fProgramBuilder->appendUniformDecls((GrShaderFlags) visibility, &this->uniforms());
this->appendDecls(fInputs, &this->inputs());
this->appendDecls(fOutputs, &this->outputs());
this->onFinalize();
// append the 'footer' to code
this->code().append("}");
for (int i = 0; i <= fCodeIndex; i++) {
fCompilerStrings[i] = fShaderStrings[i].c_str();
fCompilerStringLengths[i] = (int)fShaderStrings[i].size();
}
fFinalized = true;
}
|
