The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/skia/trunk/src/gpu/gl/GrGLSL.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,92 @@
     1.4 +/*
     1.5 + * Copyright 2011 Google Inc.
     1.6 + *
     1.7 + * Use of this source code is governed by a BSD-style license that can be
     1.8 + * found in the LICENSE file.
     1.9 + */
    1.10 +
    1.11 +#include "GrGLSL.h"
    1.12 +#include "GrGLShaderVar.h"
    1.13 +#include "SkString.h"
    1.14 +
    1.15 +GrGLSLGeneration GrGetGLSLGeneration(const GrGLInterface* gl) {
    1.16 +    GrGLSLVersion ver = GrGLGetGLSLVersion(gl);
    1.17 +    switch (gl->fStandard) {
    1.18 +        case kGL_GrGLStandard:
    1.19 +            SkASSERT(ver >= GR_GLSL_VER(1,10));
    1.20 +            if (ver >= GR_GLSL_VER(1,50)) {
    1.21 +                return k150_GrGLSLGeneration;
    1.22 +            } else if (ver >= GR_GLSL_VER(1,40)) {
    1.23 +                return k140_GrGLSLGeneration;
    1.24 +            } else if (ver >= GR_GLSL_VER(1,30)) {
    1.25 +                return k130_GrGLSLGeneration;
    1.26 +            } else {
    1.27 +                return k110_GrGLSLGeneration;
    1.28 +            }
    1.29 +        case kGLES_GrGLStandard:
    1.30 +            // version 1.00 of ES GLSL based on ver 1.20 of desktop GLSL
    1.31 +            SkASSERT(ver >= GR_GL_VER(1,00));
    1.32 +            return k110_GrGLSLGeneration;
    1.33 +        default:
    1.34 +            GrCrash("Unknown GL Standard");
    1.35 +            return k110_GrGLSLGeneration; // suppress warning
    1.36 +    }
    1.37 +}
    1.38 +
    1.39 +const char* GrGetGLSLVersionDecl(const GrGLContextInfo& info) {
    1.40 +    switch (info.glslGeneration()) {
    1.41 +        case k110_GrGLSLGeneration:
    1.42 +            if (kGLES_GrGLStandard == info.standard()) {
    1.43 +                // ES2s shader language is based on version 1.20 but is version
    1.44 +                // 1.00 of the ES language.
    1.45 +                return "#version 100\n";
    1.46 +            } else {
    1.47 +                SkASSERT(kGL_GrGLStandard == info.standard());
    1.48 +                return "#version 110\n";
    1.49 +            }
    1.50 +        case k130_GrGLSLGeneration:
    1.51 +            SkASSERT(kGL_GrGLStandard == info.standard());
    1.52 +            return "#version 130\n";
    1.53 +        case k140_GrGLSLGeneration:
    1.54 +            SkASSERT(kGL_GrGLStandard == info.standard());
    1.55 +            return "#version 140\n";
    1.56 +        case k150_GrGLSLGeneration:
    1.57 +            SkASSERT(kGL_GrGLStandard == info.standard());
    1.58 +            if (info.caps()->isCoreProfile()) {
    1.59 +                return "#version 150\n";
    1.60 +            } else {
    1.61 +                return "#version 150 compatibility\n";
    1.62 +            }
    1.63 +        default:
    1.64 +            GrCrash("Unknown GL version.");
    1.65 +            return ""; // suppress warning
    1.66 +    }
    1.67 +}
    1.68 +
    1.69 +namespace {
    1.70 +    void append_tabs(SkString* outAppend, int tabCnt) {
    1.71 +        static const char kTabs[] = "\t\t\t\t\t\t\t\t";
    1.72 +        while (tabCnt) {
    1.73 +            int cnt = GrMin((int)GR_ARRAY_COUNT(kTabs), tabCnt);
    1.74 +            outAppend->append(kTabs, cnt);
    1.75 +            tabCnt -= cnt;
    1.76 +        }
    1.77 +    }
    1.78 +}
    1.79 +
    1.80 +void GrGLSLMulVarBy4f(SkString* outAppend,
    1.81 +                      unsigned tabCnt,
    1.82 +                      const char* vec4VarName,
    1.83 +                      const GrGLSLExpr4& mulFactor) {
    1.84 +    if (mulFactor.isOnes()) {
    1.85 +        *outAppend = SkString();
    1.86 +    }
    1.87 +
    1.88 +    append_tabs(outAppend, tabCnt);
    1.89 +
    1.90 +    if (mulFactor.isZeros()) {
    1.91 +        outAppend->appendf("%s = vec4(0);\n", vec4VarName);
    1.92 +    } else {
    1.93 +        outAppend->appendf("%s *= %s;\n", vec4VarName, mulFactor.c_str());
    1.94 +    }
    1.95 +}