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Side by Side Diff: src/gpu/glsl/GrGLSL.cpp

Issue 1403373012: Make appending default precision be controled by GLSL (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: rebase Created 5 years, 1 month ago
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1 /* 1 /*
2 * Copyright 2011 Google Inc. 2 * Copyright 2011 Google Inc.
3 * 3 *
4 * Use of this source code is governed by a BSD-style license that can be 4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file. 5 * found in the LICENSE file.
6 */ 6 */
7 7
8 #include "GrGLSL.h" 8 #include "GrGLSL.h"
9 #include "GrGLSLCaps.h"
9 #include "SkString.h" 10 #include "SkString.h"
10 11
11 bool GrGLSLSupportsNamedFragmentShaderOutputs(GrGLSLGeneration gen) { 12 bool GrGLSLSupportsNamedFragmentShaderOutputs(GrGLSLGeneration gen) {
12 switch (gen) { 13 switch (gen) {
13 case k110_GrGLSLGeneration: 14 case k110_GrGLSLGeneration:
14 return false; 15 return false;
15 case k130_GrGLSLGeneration: 16 case k130_GrGLSLGeneration:
16 case k140_GrGLSLGeneration: 17 case k140_GrGLSLGeneration:
17 case k150_GrGLSLGeneration: 18 case k150_GrGLSLGeneration:
18 case k330_GrGLSLGeneration: 19 case k330_GrGLSLGeneration:
19 case k310es_GrGLSLGeneration: 20 case k310es_GrGLSLGeneration:
20 return true; 21 return true;
21 } 22 }
22 return false; 23 return false;
23 } 24 }
24 25
26 void GrGLSLAppendDefaultFloatPrecisionDeclaration(GrSLPrecision p,
27 const GrGLSLCaps& glslCaps,
28 SkString* out) {
29 if (glslCaps.usesPrecisionModifiers()) {
30 switch (p) {
31 case kHigh_GrSLPrecision:
32 out->append("precision highp float;\n");
33 break;
34 case kMedium_GrSLPrecision:
35 out->append("precision mediump float;\n");
36 break;
37 case kLow_GrSLPrecision:
38 out->append("precision lowp float;\n");
39 break;
40 default:
41 SkFAIL("Unknown precision value.");
42 }
43 }
44 }
45
25 void GrGLSLMulVarBy4f(SkString* outAppend, const char* vec4VarName, const GrGLSL Expr4& mulFactor) { 46 void GrGLSLMulVarBy4f(SkString* outAppend, const char* vec4VarName, const GrGLSL Expr4& mulFactor) {
26 if (mulFactor.isOnes()) { 47 if (mulFactor.isOnes()) {
27 *outAppend = SkString(); 48 *outAppend = SkString();
28 } 49 }
29 50
30 if (mulFactor.isZeros()) { 51 if (mulFactor.isZeros()) {
31 outAppend->appendf("%s = vec4(0);", vec4VarName); 52 outAppend->appendf("%s = vec4(0);", vec4VarName);
32 } else { 53 } else {
33 outAppend->appendf("%s *= %s;", vec4VarName, mulFactor.c_str()); 54 outAppend->appendf("%s *= %s;", vec4VarName, mulFactor.c_str());
34 } 55 }
35 } 56 }
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