diff options
Diffstat (limited to 'src/gpu/gl/GrGLSL.cpp')
| -rw-r--r-- | src/gpu/gl/GrGLSL.cpp | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/gpu/gl/GrGLSL.cpp b/src/gpu/gl/GrGLSL.cpp index c995a34652..079c08232f 100644 --- a/src/gpu/gl/GrGLSL.cpp +++ b/src/gpu/gl/GrGLSL.cpp @@ -115,6 +115,7 @@ GrSLConstantVec GrGLSLModulate4f(SkString* outAppend, outAppend->append(GrGLSLZerosVecf(4)); return kZeros_GrSLConstantVec; } else { + // both inputs are ones vectors outAppend->append(GrGLSLOnesVecf(4)); return kOnes_GrSLConstantVec; } @@ -142,6 +143,43 @@ GrSLConstantVec GrGLSLModulate4f(SkString* outAppend, } } +namespace { +void append_tabs(SkString* outAppend, int tabCnt) { + static const char kTabs[] = "\t\t\t\t\t\t\t\t"; + while (tabCnt) { + int cnt = GrMin((int)GR_ARRAY_COUNT(kTabs), tabCnt); + outAppend->append(kTabs, cnt); + tabCnt -= cnt; + } +} +} + +GrSLConstantVec GrGLSLMulVarBy4f(SkString* outAppend, + int tabCnt, + const char* vec4VarName, + const char* mulFactor, + GrSLConstantVec mulFactorDefault) { + bool haveFactor = NULL != mulFactor && '\0' != *mulFactor; + + GrAssert(NULL != outAppend); + GrAssert(NULL != vec4VarName); + GrAssert(kNone_GrSLConstantVec != mulFactorDefault || haveFactor); + + if (!haveFactor) { + if (kOnes_GrSLConstantVec == mulFactorDefault) { + return kNone_GrSLConstantVec; + } else { + GrAssert(kZeros_GrSLConstantVec == mulFactorDefault); + append_tabs(outAppend, tabCnt); + outAppend->appendf("%s = vec4(0, 0, 0, 0);\n", vec4VarName); + return kZeros_GrSLConstantVec; + } + } + append_tabs(outAppend, tabCnt); + outAppend->appendf("%s *= %s;\n", vec4VarName, mulFactor); + return kNone_GrSLConstantVec; +} + GrSLConstantVec GrGLSLAdd4f(SkString* outAppend, const char* in0, const char* in1, |