tests/SkSLGLSLTest.cpp - platform/external/skia - Gitiles

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */

 #include "SkSLCompiler.h"

 #include "Test.h"

 #if SK_SUPPORT_GPU

 static void test(skiatest::Reporter* r, const char* src, const SkSL::Program::Settings& settings,
                  const char* expected, SkSL::Program::Inputs* inputs) {
     SkSL::Compiler compiler;
     SkString output;
     std::unique_ptr<SkSL::Program> program = compiler.convertProgram(SkSL::Program::kFragment_Kind,
                                                                      SkString(src),
                                                                      settings);
     if (!program) {
         SkDebugf("Unexpected error compiling %s\n%s", src, compiler.errorText().c_str());
     }
     REPORTER_ASSERT(r, program);
     *inputs = program->fInputs;
     REPORTER_ASSERT(r, compiler.toGLSL(*program, &output));
     if (program) {
         SkString skExpected(expected);
         if (output != skExpected) {
             SkDebugf("GLSL MISMATCH:\nsource:\n%s\n\nexpected:\n'%s'\n\nreceived:\n'%s'", src,
                      expected, output.c_str());
         }
         REPORTER_ASSERT(r, output == skExpected);
     }
 }

 static void test(skiatest::Reporter* r, const char* src, const GrShaderCaps& caps,
                  const char* expected) {
     SkSL::Program::Settings settings;
     settings.fCaps = &caps;
     SkSL::Program::Inputs inputs;
     test(r, src, settings, expected, &inputs);
 }

 DEF_TEST(SkSLHelloWorld, r) {
     test(r,
          "void main() { sk_FragColor = vec4(0.75); }",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    sk_FragColor = vec4(0.75);\n"
          "}\n");
 }

 DEF_TEST(SkSLControl, r) {
     test(r,
          "void main() {"
          "if (sqrt(2) > 5) { sk_FragColor = vec4(0.75); } else { discard; }"
          "int i = 0;"
          "while (i < 10) sk_FragColor *= 0.5;"
          "do { sk_FragColor += 0.01; } while (sk_FragColor.x < 0.75);"
          "for (int i = 0; i < 10; i++) {"
          "if (i % 0 == 1) break; else continue;"
          "}"
          "return;"
          "}",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    if (sqrt(2.0) > 5.0) {\n"
          "        sk_FragColor = vec4(0.75);\n"
          "    } else {\n"
          "        discard;\n"
          "    }\n"
          "    int i = 0;\n"
          "    while (i < 10) sk_FragColor *= 0.5;\n"
          "    do {\n"
          "        sk_FragColor += 0.01;\n"
          "    } while (sk_FragColor.x < 0.75);\n"
          "    for (int i = 0;i < 10; i++) {\n"
          "        if (i % 0 == 1) break; else continue;\n"
          "    }\n"
          "    return;\n"
          "}\n");
 }

 DEF_TEST(SkSLFunctions, r) {
     test(r,
          "float foo(float v[2]) { return v[0] * v[1]; }"
          "void bar(inout float x) { float y[2], z; y[0] = x; y[1] = x * 2; z = foo(y); x = z; }"
          "void main() { float x = 10; bar(x); sk_FragColor = vec4(x); }",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "float foo(in float v[2]) {\n"
          "    return v[0] * v[1];\n"
          "}\n"
          "void bar(inout float x) {\n"
          "    float y[2], z;\n"
          "    y[0] = x;\n"
          "    y[1] = x * 2.0;\n"
          "    z = foo(y);\n"
          "    x = z;\n"
          "}\n"
          "void main() {\n"
          "    float x = 10.0;\n"
          "    bar(x);\n"
          "    sk_FragColor = vec4(x);\n"
          "}\n");
 }

 DEF_TEST(SkSLOperators, r) {
     test(r,
          "void main() {"
          "float x = 1, y = 2;"
          "int z = 3;"
          "x = x + y * z * x * (y - z);"
          "y = x / y / z;"
          "z = (z / 2 % 3 << 4) >> 2 << 1;"
          "bool b = (x > 4) == x < 2 || 2 >= sqrt(2) && y <= z;"
          "x += 12;"
          "x -= 12;"
          "x *= y /= z = 10;"
          "b ||= false;"
          "b &&= true;"
          "b ^^= false;"
          "z |= 0;"
          "z &= -1;"
          "z ^= 0;"
          "z >>= 2;"
          "z <<= 4;"
          "z %= 5;"
          "}",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    float x = 1.0, y = 2.0;\n"
          "    int z = 3;\n"
          "    x = x + ((y * float(z)) * x) * (y - float(z));\n"
          "    y = (x / y) / float(z);\n"
          "    z = (((z / 2) % 3 << 4) >> 2) << 1;\n"
          "    bool b = x > 4.0 == x < 2.0 || 2.0 >= sqrt(2.0) && y <= float(z);\n"
          "    x += 12.0;\n"
          "    x -= 12.0;\n"
          "    x *= (y /= float(z = 10));\n"
          "    b ||= false;\n"
          "    b &&= true;\n"
          "    b ^^= false;\n"
          "    z |= 0;\n"
          "    z &= -1;\n"
          "    z ^= 0;\n"
          "    z >>= 2;\n"
          "    z <<= 4;\n"
          "    z %= 5;\n"
          "}\n");
 }

 DEF_TEST(SkSLMatrices, r) {
     test(r,
          "void main() {"
          "mat2x4 x = mat2x4(1);"
          "mat3x2 y = mat3x2(1, 0, 0, 1, vec2(2, 2));"
          "mat3x4 z = x * y;"
          "vec3 v1 = mat3(1) * vec3(1);"
          "vec3 v2 = vec3(1) * mat3(1);"
          "}",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    mat2x4 x = mat2x4(1.0);\n"
          "    mat3x2 y = mat3x2(1.0, 0.0, 0.0, 1.0, vec2(2.0, 2.0));\n"
          "    mat3x4 z = x * y;\n"
          "    vec3 v1 = mat3(1.0) * vec3(1.0);\n"
          "    vec3 v2 = vec3(1.0) * mat3(1.0);\n"
          "}\n");
 }

 DEF_TEST(SkSLInterfaceBlock, r) {
     test(r,
          "uniform testBlock {"
          "float x;"
          "float y[2];"
          "layout(binding=12) mat3x2 z;"
          "bool w;"
          "};"
          "void main() {"
          "}",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "uniform testBlock {\n"
          "    float x;\n"
          "    float[2] y;\n"
          "    layout (binding = 12) mat3x2 z;\n"
          "    bool w;\n"
          "};\n"
          "void main() {\n"
          "}\n");
 }

 DEF_TEST(SkSLStructs, r) {
     test(r,
          "struct A {"
          "int x;"
          "int y;"
          "} a1, a2;"
          "A a3;"
          "struct B {"
          "float x;"
          "float y[2];"
          "layout(binding=1) A z;"
          "};"
          "B b1, b2, b3;"
          "void main() {"
          "}",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "struct A {\n"
          "    int x;\n"
          "    int y;\n"
          "} a1, a2;\n"
          "A a3;\n"
          "struct B {\n"
          "    float x;\n"
          "    float[2] y;\n"
          "    layout (binding = 1) A z;\n"
          "} b1, b2, b3;\n"
          "void main() {\n"
          "}\n");
 }

 DEF_TEST(SkSLVersion, r) {
     test(r,
          "in float test; void main() { sk_FragColor = vec4(0.75); }",
          *SkSL::ShaderCapsFactory::Version450Core(),
          "#version 450 core\n"
          "out vec4 sk_FragColor;\n"
          "in float test;\n"
          "void main() {\n"
          "    sk_FragColor = vec4(0.75);\n"
          "}\n");
     test(r,
          "in float test; void main() { sk_FragColor = vec4(0.75); }",
          *SkSL::ShaderCapsFactory::Version110(),
          "#version 110\n"
          "varying float test;\n"
          "void main() {\n"
          "    gl_FragColor = vec4(0.75);\n"
          "}\n");
 }

 DEF_TEST(SkSLUsesPrecisionModifiers, r) {
     test(r,
          "void main() { float x = 0.75; highp float y = 1; }",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    float x = 0.75;\n"
          "    float y = 1.0;\n"
          "}\n");
     test(r,
          "void main() { float x = 0.75; highp float y = 1; }",
          *SkSL::ShaderCapsFactory::UsesPrecisionModifiers(),
          "#version 400\n"
          "precision highp float;\n"
          "out mediump vec4 sk_FragColor;\n"
          "void main() {\n"
          "    float x = 0.75;\n"
          "    highp float y = 1.0;\n"
          "}\n");
 }

 DEF_TEST(SkSLMinAbs, r) {
     test(r,
          "void main() {"
          "float x = -5;"
          "x = min(abs(x), 6);"
          "}",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    float x = -5.0;\n"
          "    x = min(abs(x), 6.0);\n"
          "}\n");

     test(r,
          "void main() {"
          "float x = -5.0;"
          "x = min(abs(x), 6.0);"
          "}",
          *SkSL::ShaderCapsFactory::CannotUseMinAndAbsTogether(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    float minAbsHackVar0;\n"
          "    float minAbsHackVar1;\n"
          "    float x = -5.0;\n"
          "    x = ((minAbsHackVar0 = abs(x)) < (minAbsHackVar1 = 6.0) ? minAbsHackVar0 : "
                                                                                 "minAbsHackVar1);\n"
          "}\n");
 }

 DEF_TEST(SkSLNegatedAtan, r) {
     test(r,
          "void main() { vec2 x = vec2(1, 2); float y = atan(x.x, -(2 * x.y)); }",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    vec2 x = vec2(1.0, 2.0);\n"
          "    float y = atan(x.x, -(2.0 * x.y));\n"
          "}\n");
     test(r,
          "void main() { vec2 x = vec2(1, 2); float y = atan(x.x, -(2 * x.y)); }",
          *SkSL::ShaderCapsFactory::MustForceNegatedAtanParamToFloat(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    vec2 x = vec2(1.0, 2.0);\n"
          "    float y = atan(x.x, -1.0 * (2.0 * x.y));\n"
          "}\n");
 }

 DEF_TEST(SkSLModifiersDeclaration, r) {
     test(r,
          "layout(blend_support_all_equations) out;"
          "void main() { }",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "layout (blend_support_all_equations) out ;\n"
          "void main() {\n"
          "}\n");
 }

 DEF_TEST(SkSLHex, r) {
     test(r,
          "void main() {"
          "int i1 = 0x0;"
          "int i2 = 0x1234abcd;"
          "int i3 = 0x7fffffff;"
          "int i4 = 0xffffffff;"
          "int i5 = -0xbeef;"
          "uint u1 = 0x0;"
          "uint u2 = 0x1234abcd;"
          "uint u3 = 0x7fffffff;"
          "uint u4 = 0xffffffff;"
          "}",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    int i1 = 0;\n"
          "    int i2 = 305441741;\n"
          "    int i3 = 2147483647;\n"
          "    int i4 = -1;\n"
          "    int i5 = -48879;\n"
          "    uint u1 = 0u;\n"
          "    uint u2 = 305441741u;\n"
          "    uint u3 = 2147483647u;\n"
          "    uint u4 = 4294967295u;\n"
          "}\n");
 }

 DEF_TEST(SkSLVectorConstructors, r) {
     test(r,
          "vec2 v1 = vec2(1);"
          "vec2 v2 = vec2(1, 2);"
          "vec2 v3 = vec2(vec2(1));"
          "vec2 v4 = vec2(vec3(1));"
          "vec3 v5 = vec3(vec2(1), 1.0);"
          "vec3 v6 = vec3(vec4(1, 2, 3, 4));"
          "ivec2 v7 = ivec2(1);"
          "ivec2 v8 = ivec2(vec2(1, 2));"
          "vec2 v9 = vec2(ivec2(1, 2));",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "vec2 v1 = vec2(1.0);\n"
          "vec2 v2 = vec2(1.0, 2.0);\n"
          "vec2 v3 = vec2(1.0);\n"
          "vec2 v4 = vec2(vec3(1.0));\n"
          "vec3 v5 = vec3(vec2(1.0), 1.0);\n"
          "vec3 v6 = vec3(vec4(1.0, 2.0, 3.0, 4.0));\n"
          "ivec2 v7 = ivec2(1);\n"
          "ivec2 v8 = ivec2(vec2(1.0, 2.0));\n"
          "vec2 v9 = vec2(ivec2(1, 2));\n");
 }

 DEF_TEST(SkSLArrayConstructors, r) {
     test(r,
          "float test1[] = float[](1, 2, 3, 4);"
          "vec2 test2[] = vec2[](vec2(1, 2), vec2(3, 4));"
          "mat4 test3[] = mat4[]();",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "float test1[] = float[](1.0, 2.0, 3.0, 4.0);\n"
          "vec2 test2[] = vec2[](vec2(1.0, 2.0), vec2(3.0, 4.0));\n"
          "mat4 test3[] = mat4[]();\n");
 }

 DEF_TEST(SkSLDerivatives, r) {
     test(r,
          "void main() { float x = dFdx(1); }",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    float x = dFdx(1.0);\n"
          "}\n");
     test(r,
          "void main() { float x = 1; }",
          *SkSL::ShaderCapsFactory::ShaderDerivativeExtensionString(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    float x = 1.0;\n"
          "}\n");
     test(r,
          "void main() { float x = dFdx(1); }",
          *SkSL::ShaderCapsFactory::ShaderDerivativeExtensionString(),
          "#version 400\n"
          "#extension GL_OES_standard_derivatives : require\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    float x = dFdx(1.0);\n"
          "}\n");
 }

 DEF_TEST(SkSLConstantFolding, r) {
     test(r,
          "void main() {"
          "float f_add = 32 + 2;"
          "float f_sub = 32 - 2;"
          "float f_mul = 32 * 2;"
          "float f_div = 32 / 2;"
          "float mixed = (12 > 2.0) ? (10 * 2 / 5 + 18 - 3) : 0;"
          "int i_add = 32 + 2;"
          "int i_sub = 32 - 2;"
          "int i_mul = 32 * 2;"
          "int i_div = 32 / 2;"
          "int i_or = 12 | 6;"
          "int i_and = 254 & 7;"
          "int i_xor = 2 ^ 7;"
          "int i_shl = 1 << 4;"
          "int i_shr = 128 >> 2;"
          "bool gt_it = 6 > 5;"
          "bool gt_if = 6 > 6;"
          "bool gt_ft = 6.0 > 5.0;"
          "bool gt_ff = 6.0 > 6.0;"
          "bool gte_it = 6 >= 6;"
          "bool gte_if = 6 >= 7;"
          "bool gte_ft = 6.0 >= 6.0;"
          "bool gte_ff = 6.0 >= 7.0;"
          "bool lte_it = 6 <= 6;"
          "bool lte_if = 6 <= 5;"
          "bool lte_ft = 6.0 <= 6.0;"
          "bool lte_ff = 6.0 <= 5.0;"
          "bool or_t = 1 == 1 || 2 == 8;"
          "bool or_f = 1 > 1 || 2 == 8;"
          "bool and_t = 1 == 1 && 2 <= 8;"
          "bool and_f = 1 == 2 && 2 == 8;"
          "bool xor_t = 1 == 1 ^^ 1 != 1;"
          "bool xor_f = 1 == 1 ^^ 1 == 1;"
          "int ternary = 10 > 5 ? 10 : 5;"
          "}",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    float f_add = 34.0;\n"
          "    float f_sub = 30.0;\n"
          "    float f_mul = 64.0;\n"
          "    float f_div = 16.0;\n"
          "    float mixed = 19.0;\n"
          "    int i_add = 34;\n"
          "    int i_sub = 30;\n"
          "    int i_mul = 64;\n"
          "    int i_div = 16;\n"
          "    int i_or = 14;\n"
          "    int i_and = 6;\n"
          "    int i_xor = 5;\n"
          "    int i_shl = 16;\n"
          "    int i_shr = 32;\n"
          "    bool gt_it = true;\n"
          "    bool gt_if = false;\n"
          "    bool gt_ft = true;\n"
          "    bool gt_ff = false;\n"
          "    bool gte_it = true;\n"
          "    bool gte_if = false;\n"
          "    bool gte_ft = true;\n"
          "    bool gte_ff = false;\n"
          "    bool lte_it = true;\n"
          "    bool lte_if = false;\n"
          "    bool lte_ft = true;\n"
          "    bool lte_ff = false;\n"
          "    bool or_t = true;\n"
          "    bool or_f = false;\n"
          "    bool and_t = true;\n"
          "    bool and_f = false;\n"
          "    bool xor_t = true;\n"
          "    bool xor_f = false;\n"
          "    int ternary = 10;\n"
          "}\n");
 }

 DEF_TEST(SkSLStaticIf, r) {
     test(r,
          "void main() {"
          "int x;"
          "if (true) x = 1;"
          "if (2 > 1) x = 2; else x = 3;"
          "if (1 > 2) x = 4; else x = 5;"
          "if (false) x = 6;"
          "}",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    int x;\n"
          "    x = 1;\n"
          "    x = 2;\n"
          "    x = 5;\n"
          "    {\n"
          "    }\n"
          "}\n");
 }

 DEF_TEST(SkSLCaps, r) {
     test(r,
          "void main() {"
          "int x;"
          "if (sk_Caps.externalTextureSupport) x = 1;"
          "if (sk_Caps.fbFetchSupport) x = 2;"
          "if (sk_Caps.dropsTileOnZeroDivide && sk_Caps.texelFetchSupport) x = 3;"
          "if (sk_Caps.dropsTileOnZeroDivide && sk_Caps.canUseAnyFunctionInShader) x = 4;"
          "}",
          *SkSL::ShaderCapsFactory::VariousCaps(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    int x;\n"
          "    x = 1;\n"
          "    {\n"
          "    }\n"
          "    x = 3;\n"
          "    {\n"
          "    }\n"
          "}\n");
 }

 DEF_TEST(SkSLTexture, r) {
     test(r,
          "uniform sampler1D one;"
          "uniform sampler2D two;"
          "void main() {"
          "vec4 a = texture(one, 0);"
          "vec4 b = texture(two, vec2(0));"
          "vec4 c = texture(one, vec2(0));"
          "vec4 d = texture(two, vec3(0));"
          "}",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "uniform sampler1D one;\n"
          "uniform sampler2D two;\n"
          "void main() {\n"
          "    vec4 a = texture(one, 0.0);\n"
          "    vec4 b = texture(two, vec2(0.0));\n"
          "    vec4 c = textureProj(one, vec2(0.0));\n"
          "    vec4 d = textureProj(two, vec3(0.0));\n"
          "}\n");
     test(r,
          "uniform sampler1D one;"
          "uniform sampler2D two;"
          "void main() {"
          "vec4 a = texture(one, 0);"
          "vec4 b = texture(two, vec2(0));"
          "vec4 c = texture(one, vec2(0));"
          "vec4 d = texture(two, vec3(0));"
          "}",
          *SkSL::ShaderCapsFactory::Version110(),
          "#version 110\n"
          "uniform sampler1D one;\n"
          "uniform sampler2D two;\n"
          "void main() {\n"
          "    vec4 a = texture1D(one, 0.0);\n"
          "    vec4 b = texture2D(two, vec2(0.0));\n"
          "    vec4 c = texture1DProj(one, vec2(0.0));\n"
          "    vec4 d = texture2DProj(two, vec3(0.0));\n"
          "}\n");
 }

 DEF_TEST(SkSLOffset, r) {
     test(r,
          "struct Test {"
          "layout(offset = 0) int x;"
          "layout(offset = 4) int y;"
          "int z;"
          "} test;",
          *SkSL::ShaderCapsFactory::Default(),
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "struct Test {\n"
          "    layout (offset = 0) int x;\n"
          "    layout (offset = 4) int y;\n"
          "    int z;\n"
          "} test;\n");
 }

 DEF_TEST(SkSLFragCoord, r) {
     SkSL::Program::Settings settings;
     settings.fFlipY = true;
     sk_sp<GrShaderCaps> caps = SkSL::ShaderCapsFactory::FragCoordsOld();
     settings.fCaps = caps.get();
     SkSL::Program::Inputs inputs;
     test(r,
          "void main() { sk_FragColor.xy = sk_FragCoord.xy; }",
          settings,
          "#version 110\n"
          "#extension GL_ARB_fragment_coord_conventions : require\n"
          "layout(origin_upper_left) in vec4 gl_FragCoord;\n"
          "void main() {\n"
          "    gl_FragColor.xy = gl_FragCoord.xy;\n"
          "}\n",
          &inputs);
     REPORTER_ASSERT(r, !inputs.fRTHeight);

     caps = SkSL::ShaderCapsFactory::FragCoordsNew();
     settings.fCaps = caps.get();
     test(r,
          "void main() { sk_FragColor.xy = sk_FragCoord.xy; }",
          settings,
          "#version 400\n"
          "layout(origin_upper_left) in vec4 gl_FragCoord;\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    sk_FragColor.xy = gl_FragCoord.xy;\n"
          "}\n",
          &inputs);
     REPORTER_ASSERT(r, !inputs.fRTHeight);

     caps = SkSL::ShaderCapsFactory::Default();
     settings.fCaps = caps.get();
     test(r,
          "void main() { sk_FragColor.xy = sk_FragCoord.xy; }",
          settings,
          "#version 400\n"
          "uniform float u_skRTHeight;\n"
          "highp vec2 _sktmpCoord = gl_FragCoord.xy;\n"
          "highp vec4 sk_FragCoord = vec4(_sktmpCoord.x, u_skRTHeight - _sktmpCoord.y, 1.0, 1.0);\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    sk_FragColor.xy = sk_FragCoord.xy;\n"
          "}\n",
          &inputs);
     REPORTER_ASSERT(r, inputs.fRTHeight);

     settings.fFlipY = false;
     test(r,
          "void main() { sk_FragColor.xy = sk_FragCoord.xy; }",
          settings,
          "#version 400\n"
          "out vec4 sk_FragColor;\n"
          "void main() {\n"
          "    sk_FragColor.xy = gl_FragCoord.xy;\n"
          "}\n",
          &inputs);
     REPORTER_ASSERT(r, !inputs.fRTHeight);
 }

 #endif
	/*
	* Copyright 2016 Google Inc.
	*
	* Use of this source code is governed by a BSD-style license that can be
	* found in the LICENSE file.
	*/

	#include "SkSLCompiler.h"

	#include "Test.h"

	#if SK_SUPPORT_GPU

	static void test(skiatest::Reporter* r, const char* src, const SkSL::Program::Settings& settings,
	const char* expected, SkSL::Program::Inputs* inputs) {
	SkSL::Compiler compiler;
	SkString output;
	std::unique_ptr<SkSL::Program> program = compiler.convertProgram(SkSL::Program::kFragment_Kind,
	SkString(src),
	settings);
	if (!program) {
	SkDebugf("Unexpected error compiling %s\n%s", src, compiler.errorText().c_str());
	}
	REPORTER_ASSERT(r, program);
	*inputs = program->fInputs;
	REPORTER_ASSERT(r, compiler.toGLSL(*program, &output));
	if (program) {
	SkString skExpected(expected);
	if (output != skExpected) {
	SkDebugf("GLSL MISMATCH:\nsource:\n%s\n\nexpected:\n'%s'\n\nreceived:\n'%s'", src,
	expected, output.c_str());
	}
	REPORTER_ASSERT(r, output == skExpected);
	}
	}

	static void test(skiatest::Reporter* r, const char* src, const GrShaderCaps& caps,
	const char* expected) {
	SkSL::Program::Settings settings;
	settings.fCaps = &caps;
	SkSL::Program::Inputs inputs;
	test(r, src, settings, expected, &inputs);
	}

	DEF_TEST(SkSLHelloWorld, r) {
	test(r,
	"void main() { sk_FragColor = vec4(0.75); }",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" sk_FragColor = vec4(0.75);\n"
	"}\n");
	}

	DEF_TEST(SkSLControl, r) {
	test(r,
	"void main() {"
	"if (sqrt(2) > 5) { sk_FragColor = vec4(0.75); } else { discard; }"
	"int i = 0;"
	"while (i < 10) sk_FragColor *= 0.5;"
	"do { sk_FragColor += 0.01; } while (sk_FragColor.x < 0.75);"
	"for (int i = 0; i < 10; i++) {"
	"if (i % 0 == 1) break; else continue;"
	"}"
	"return;"
	"}",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" if (sqrt(2.0) > 5.0) {\n"
	" sk_FragColor = vec4(0.75);\n"
	" } else {\n"
	" discard;\n"
	" }\n"
	" int i = 0;\n"
	" while (i < 10) sk_FragColor *= 0.5;\n"
	" do {\n"
	" sk_FragColor += 0.01;\n"
	" } while (sk_FragColor.x < 0.75);\n"
	" for (int i = 0;i < 10; i++) {\n"
	" if (i % 0 == 1) break; else continue;\n"
	" }\n"
	" return;\n"
	"}\n");
	}

	DEF_TEST(SkSLFunctions, r) {
	test(r,
	"float foo(float v[2]) { return v[0] * v[1]; }"
	"void bar(inout float x) { float y[2], z; y[0] = x; y[1] = x * 2; z = foo(y); x = z; }"
	"void main() { float x = 10; bar(x); sk_FragColor = vec4(x); }",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"float foo(in float v[2]) {\n"
	" return v[0] * v[1];\n"
	"}\n"
	"void bar(inout float x) {\n"
	" float y[2], z;\n"
	" y[0] = x;\n"
	" y[1] = x * 2.0;\n"
	" z = foo(y);\n"
	" x = z;\n"
	"}\n"
	"void main() {\n"
	" float x = 10.0;\n"
	" bar(x);\n"
	" sk_FragColor = vec4(x);\n"
	"}\n");
	}

	DEF_TEST(SkSLOperators, r) {
	test(r,
	"void main() {"
	"float x = 1, y = 2;"
	"int z = 3;"
	"x = x + y * z * x * (y - z);"
	"y = x / y / z;"
	"z = (z / 2 % 3 << 4) >> 2 << 1;"
	"bool b = (x > 4) == x < 2 \|\| 2 >= sqrt(2) && y <= z;"
	"x += 12;"
	"x -= 12;"
	"x *= y /= z = 10;"
	"b \|\|= false;"
	"b &&= true;"
	"b ^^= false;"
	"z \|= 0;"
	"z &= -1;"
	"z ^= 0;"
	"z >>= 2;"
	"z <<= 4;"
	"z %= 5;"
	"}",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" float x = 1.0, y = 2.0;\n"
	" int z = 3;\n"
	" x = x + ((y * float(z)) * x) * (y - float(z));\n"
	" y = (x / y) / float(z);\n"
	" z = (((z / 2) % 3 << 4) >> 2) << 1;\n"
	" bool b = x > 4.0 == x < 2.0 \|\| 2.0 >= sqrt(2.0) && y <= float(z);\n"
	" x += 12.0;\n"
	" x -= 12.0;\n"
	" x *= (y /= float(z = 10));\n"
	" b \|\|= false;\n"
	" b &&= true;\n"
	" b ^^= false;\n"
	" z \|= 0;\n"
	" z &= -1;\n"
	" z ^= 0;\n"
	" z >>= 2;\n"
	" z <<= 4;\n"
	" z %= 5;\n"
	"}\n");
	}

	DEF_TEST(SkSLMatrices, r) {
	test(r,
	"void main() {"
	"mat2x4 x = mat2x4(1);"
	"mat3x2 y = mat3x2(1, 0, 0, 1, vec2(2, 2));"
	"mat3x4 z = x * y;"
	"vec3 v1 = mat3(1) * vec3(1);"
	"vec3 v2 = vec3(1) * mat3(1);"
	"}",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" mat2x4 x = mat2x4(1.0);\n"
	" mat3x2 y = mat3x2(1.0, 0.0, 0.0, 1.0, vec2(2.0, 2.0));\n"
	" mat3x4 z = x * y;\n"
	" vec3 v1 = mat3(1.0) * vec3(1.0);\n"
	" vec3 v2 = vec3(1.0) * mat3(1.0);\n"
	"}\n");
	}

	DEF_TEST(SkSLInterfaceBlock, r) {
	test(r,
	"uniform testBlock {"
	"float x;"
	"float y[2];"
	"layout(binding=12) mat3x2 z;"
	"bool w;"
	"};"
	"void main() {"
	"}",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"uniform testBlock {\n"
	" float x;\n"
	" float[2] y;\n"
	" layout (binding = 12) mat3x2 z;\n"
	" bool w;\n"
	"};\n"
	"void main() {\n"
	"}\n");
	}

	DEF_TEST(SkSLStructs, r) {
	test(r,
	"struct A {"
	"int x;"
	"int y;"
	"} a1, a2;"
	"A a3;"
	"struct B {"
	"float x;"
	"float y[2];"
	"layout(binding=1) A z;"
	"};"
	"B b1, b2, b3;"
	"void main() {"
	"}",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"struct A {\n"
	" int x;\n"
	" int y;\n"
	"} a1, a2;\n"
	"A a3;\n"
	"struct B {\n"
	" float x;\n"
	" float[2] y;\n"
	" layout (binding = 1) A z;\n"
	"} b1, b2, b3;\n"
	"void main() {\n"
	"}\n");
	}

	DEF_TEST(SkSLVersion, r) {
	test(r,
	"in float test; void main() { sk_FragColor = vec4(0.75); }",
	*SkSL::ShaderCapsFactory::Version450Core(),
	"#version 450 core\n"
	"out vec4 sk_FragColor;\n"
	"in float test;\n"
	"void main() {\n"
	" sk_FragColor = vec4(0.75);\n"
	"}\n");
	test(r,
	"in float test; void main() { sk_FragColor = vec4(0.75); }",
	*SkSL::ShaderCapsFactory::Version110(),
	"#version 110\n"
	"varying float test;\n"
	"void main() {\n"
	" gl_FragColor = vec4(0.75);\n"
	"}\n");
	}

	DEF_TEST(SkSLUsesPrecisionModifiers, r) {
	test(r,
	"void main() { float x = 0.75; highp float y = 1; }",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" float x = 0.75;\n"
	" float y = 1.0;\n"
	"}\n");
	test(r,
	"void main() { float x = 0.75; highp float y = 1; }",
	*SkSL::ShaderCapsFactory::UsesPrecisionModifiers(),
	"#version 400\n"
	"precision highp float;\n"
	"out mediump vec4 sk_FragColor;\n"
	"void main() {\n"
	" float x = 0.75;\n"
	" highp float y = 1.0;\n"
	"}\n");
	}

	DEF_TEST(SkSLMinAbs, r) {
	test(r,
	"void main() {"
	"float x = -5;"
	"x = min(abs(x), 6);"
	"}",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" float x = -5.0;\n"
	" x = min(abs(x), 6.0);\n"
	"}\n");

	test(r,
	"void main() {"
	"float x = -5.0;"
	"x = min(abs(x), 6.0);"
	"}",
	*SkSL::ShaderCapsFactory::CannotUseMinAndAbsTogether(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" float minAbsHackVar0;\n"
	" float minAbsHackVar1;\n"
	" float x = -5.0;\n"
	" x = ((minAbsHackVar0 = abs(x)) < (minAbsHackVar1 = 6.0) ? minAbsHackVar0 : "
	"minAbsHackVar1);\n"
	"}\n");
	}

	DEF_TEST(SkSLNegatedAtan, r) {
	test(r,
	"void main() { vec2 x = vec2(1, 2); float y = atan(x.x, -(2 * x.y)); }",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" vec2 x = vec2(1.0, 2.0);\n"
	" float y = atan(x.x, -(2.0 * x.y));\n"
	"}\n");
	test(r,
	"void main() { vec2 x = vec2(1, 2); float y = atan(x.x, -(2 * x.y)); }",
	*SkSL::ShaderCapsFactory::MustForceNegatedAtanParamToFloat(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" vec2 x = vec2(1.0, 2.0);\n"
	" float y = atan(x.x, -1.0 * (2.0 * x.y));\n"
	"}\n");
	}

	DEF_TEST(SkSLModifiersDeclaration, r) {
	test(r,
	"layout(blend_support_all_equations) out;"
	"void main() { }",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"layout (blend_support_all_equations) out ;\n"
	"void main() {\n"
	"}\n");
	}

	DEF_TEST(SkSLHex, r) {
	test(r,
	"void main() {"
	"int i1 = 0x0;"
	"int i2 = 0x1234abcd;"
	"int i3 = 0x7fffffff;"
	"int i4 = 0xffffffff;"
	"int i5 = -0xbeef;"
	"uint u1 = 0x0;"
	"uint u2 = 0x1234abcd;"
	"uint u3 = 0x7fffffff;"
	"uint u4 = 0xffffffff;"
	"}",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" int i1 = 0;\n"
	" int i2 = 305441741;\n"
	" int i3 = 2147483647;\n"
	" int i4 = -1;\n"
	" int i5 = -48879;\n"
	" uint u1 = 0u;\n"
	" uint u2 = 305441741u;\n"
	" uint u3 = 2147483647u;\n"
	" uint u4 = 4294967295u;\n"
	"}\n");
	}

	DEF_TEST(SkSLVectorConstructors, r) {
	test(r,
	"vec2 v1 = vec2(1);"
	"vec2 v2 = vec2(1, 2);"
	"vec2 v3 = vec2(vec2(1));"
	"vec2 v4 = vec2(vec3(1));"
	"vec3 v5 = vec3(vec2(1), 1.0);"
	"vec3 v6 = vec3(vec4(1, 2, 3, 4));"
	"ivec2 v7 = ivec2(1);"
	"ivec2 v8 = ivec2(vec2(1, 2));"
	"vec2 v9 = vec2(ivec2(1, 2));",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"vec2 v1 = vec2(1.0);\n"
	"vec2 v2 = vec2(1.0, 2.0);\n"
	"vec2 v3 = vec2(1.0);\n"
	"vec2 v4 = vec2(vec3(1.0));\n"
	"vec3 v5 = vec3(vec2(1.0), 1.0);\n"
	"vec3 v6 = vec3(vec4(1.0, 2.0, 3.0, 4.0));\n"
	"ivec2 v7 = ivec2(1);\n"
	"ivec2 v8 = ivec2(vec2(1.0, 2.0));\n"
	"vec2 v9 = vec2(ivec2(1, 2));\n");
	}

	DEF_TEST(SkSLArrayConstructors, r) {
	test(r,
	"float test1[] = float[](1, 2, 3, 4);"
	"vec2 test2[] = vec2[](vec2(1, 2), vec2(3, 4));"
	"mat4 test3[] = mat4[]();",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"float test1[] = float[](1.0, 2.0, 3.0, 4.0);\n"
	"vec2 test2[] = vec2[](vec2(1.0, 2.0), vec2(3.0, 4.0));\n"
	"mat4 test3[] = mat4[]();\n");
	}

	DEF_TEST(SkSLDerivatives, r) {
	test(r,
	"void main() { float x = dFdx(1); }",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" float x = dFdx(1.0);\n"
	"}\n");
	test(r,
	"void main() { float x = 1; }",
	*SkSL::ShaderCapsFactory::ShaderDerivativeExtensionString(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" float x = 1.0;\n"
	"}\n");
	test(r,
	"void main() { float x = dFdx(1); }",
	*SkSL::ShaderCapsFactory::ShaderDerivativeExtensionString(),
	"#version 400\n"
	"#extension GL_OES_standard_derivatives : require\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" float x = dFdx(1.0);\n"
	"}\n");
	}

	DEF_TEST(SkSLConstantFolding, r) {
	test(r,
	"void main() {"
	"float f_add = 32 + 2;"
	"float f_sub = 32 - 2;"
	"float f_mul = 32 * 2;"
	"float f_div = 32 / 2;"
	"float mixed = (12 > 2.0) ? (10 * 2 / 5 + 18 - 3) : 0;"
	"int i_add = 32 + 2;"
	"int i_sub = 32 - 2;"
	"int i_mul = 32 * 2;"
	"int i_div = 32 / 2;"
	"int i_or = 12 \| 6;"
	"int i_and = 254 & 7;"
	"int i_xor = 2 ^ 7;"
	"int i_shl = 1 << 4;"
	"int i_shr = 128 >> 2;"
	"bool gt_it = 6 > 5;"
	"bool gt_if = 6 > 6;"
	"bool gt_ft = 6.0 > 5.0;"
	"bool gt_ff = 6.0 > 6.0;"
	"bool gte_it = 6 >= 6;"
	"bool gte_if = 6 >= 7;"
	"bool gte_ft = 6.0 >= 6.0;"
	"bool gte_ff = 6.0 >= 7.0;"
	"bool lte_it = 6 <= 6;"
	"bool lte_if = 6 <= 5;"
	"bool lte_ft = 6.0 <= 6.0;"
	"bool lte_ff = 6.0 <= 5.0;"
	"bool or_t = 1 == 1 \|\| 2 == 8;"
	"bool or_f = 1 > 1 \|\| 2 == 8;"
	"bool and_t = 1 == 1 && 2 <= 8;"
	"bool and_f = 1 == 2 && 2 == 8;"
	"bool xor_t = 1 == 1 ^^ 1 != 1;"
	"bool xor_f = 1 == 1 ^^ 1 == 1;"
	"int ternary = 10 > 5 ? 10 : 5;"
	"}",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" float f_add = 34.0;\n"
	" float f_sub = 30.0;\n"
	" float f_mul = 64.0;\n"
	" float f_div = 16.0;\n"
	" float mixed = 19.0;\n"
	" int i_add = 34;\n"
	" int i_sub = 30;\n"
	" int i_mul = 64;\n"
	" int i_div = 16;\n"
	" int i_or = 14;\n"
	" int i_and = 6;\n"
	" int i_xor = 5;\n"
	" int i_shl = 16;\n"
	" int i_shr = 32;\n"
	" bool gt_it = true;\n"
	" bool gt_if = false;\n"
	" bool gt_ft = true;\n"
	" bool gt_ff = false;\n"
	" bool gte_it = true;\n"
	" bool gte_if = false;\n"
	" bool gte_ft = true;\n"
	" bool gte_ff = false;\n"
	" bool lte_it = true;\n"
	" bool lte_if = false;\n"
	" bool lte_ft = true;\n"
	" bool lte_ff = false;\n"
	" bool or_t = true;\n"
	" bool or_f = false;\n"
	" bool and_t = true;\n"
	" bool and_f = false;\n"
	" bool xor_t = true;\n"
	" bool xor_f = false;\n"
	" int ternary = 10;\n"
	"}\n");
	}

	DEF_TEST(SkSLStaticIf, r) {
	test(r,
	"void main() {"
	"int x;"
	"if (true) x = 1;"
	"if (2 > 1) x = 2; else x = 3;"
	"if (1 > 2) x = 4; else x = 5;"
	"if (false) x = 6;"
	"}",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" int x;\n"
	" x = 1;\n"
	" x = 2;\n"
	" x = 5;\n"
	" {\n"
	" }\n"
	"}\n");
	}

	DEF_TEST(SkSLCaps, r) {
	test(r,
	"void main() {"
	"int x;"
	"if (sk_Caps.externalTextureSupport) x = 1;"
	"if (sk_Caps.fbFetchSupport) x = 2;"
	"if (sk_Caps.dropsTileOnZeroDivide && sk_Caps.texelFetchSupport) x = 3;"
	"if (sk_Caps.dropsTileOnZeroDivide && sk_Caps.canUseAnyFunctionInShader) x = 4;"
	"}",
	*SkSL::ShaderCapsFactory::VariousCaps(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" int x;\n"
	" x = 1;\n"
	" {\n"
	" }\n"
	" x = 3;\n"
	" {\n"
	" }\n"
	"}\n");
	}

	DEF_TEST(SkSLTexture, r) {
	test(r,
	"uniform sampler1D one;"
	"uniform sampler2D two;"
	"void main() {"
	"vec4 a = texture(one, 0);"
	"vec4 b = texture(two, vec2(0));"
	"vec4 c = texture(one, vec2(0));"
	"vec4 d = texture(two, vec3(0));"
	"}",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"uniform sampler1D one;\n"
	"uniform sampler2D two;\n"
	"void main() {\n"
	" vec4 a = texture(one, 0.0);\n"
	" vec4 b = texture(two, vec2(0.0));\n"
	" vec4 c = textureProj(one, vec2(0.0));\n"
	" vec4 d = textureProj(two, vec3(0.0));\n"
	"}\n");
	test(r,
	"uniform sampler1D one;"
	"uniform sampler2D two;"
	"void main() {"
	"vec4 a = texture(one, 0);"
	"vec4 b = texture(two, vec2(0));"
	"vec4 c = texture(one, vec2(0));"
	"vec4 d = texture(two, vec3(0));"
	"}",
	*SkSL::ShaderCapsFactory::Version110(),
	"#version 110\n"
	"uniform sampler1D one;\n"
	"uniform sampler2D two;\n"
	"void main() {\n"
	" vec4 a = texture1D(one, 0.0);\n"
	" vec4 b = texture2D(two, vec2(0.0));\n"
	" vec4 c = texture1DProj(one, vec2(0.0));\n"
	" vec4 d = texture2DProj(two, vec3(0.0));\n"
	"}\n");
	}

	DEF_TEST(SkSLOffset, r) {
	test(r,
	"struct Test {"
	"layout(offset = 0) int x;"
	"layout(offset = 4) int y;"
	"int z;"
	"} test;",
	*SkSL::ShaderCapsFactory::Default(),
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"struct Test {\n"
	" layout (offset = 0) int x;\n"
	" layout (offset = 4) int y;\n"
	" int z;\n"
	"} test;\n");
	}

	DEF_TEST(SkSLFragCoord, r) {
	SkSL::Program::Settings settings;
	settings.fFlipY = true;
	sk_sp<GrShaderCaps> caps = SkSL::ShaderCapsFactory::FragCoordsOld();
	settings.fCaps = caps.get();
	SkSL::Program::Inputs inputs;
	test(r,
	"void main() { sk_FragColor.xy = sk_FragCoord.xy; }",
	settings,
	"#version 110\n"
	"#extension GL_ARB_fragment_coord_conventions : require\n"
	"layout(origin_upper_left) in vec4 gl_FragCoord;\n"
	"void main() {\n"
	" gl_FragColor.xy = gl_FragCoord.xy;\n"
	"}\n",
	&inputs);
	REPORTER_ASSERT(r, !inputs.fRTHeight);

	caps = SkSL::ShaderCapsFactory::FragCoordsNew();
	settings.fCaps = caps.get();
	test(r,
	"void main() { sk_FragColor.xy = sk_FragCoord.xy; }",
	settings,
	"#version 400\n"
	"layout(origin_upper_left) in vec4 gl_FragCoord;\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" sk_FragColor.xy = gl_FragCoord.xy;\n"
	"}\n",
	&inputs);
	REPORTER_ASSERT(r, !inputs.fRTHeight);

	caps = SkSL::ShaderCapsFactory::Default();
	settings.fCaps = caps.get();
	test(r,
	"void main() { sk_FragColor.xy = sk_FragCoord.xy; }",
	settings,
	"#version 400\n"
	"uniform float u_skRTHeight;\n"
	"highp vec2 _sktmpCoord = gl_FragCoord.xy;\n"
	"highp vec4 sk_FragCoord = vec4(_sktmpCoord.x, u_skRTHeight - _sktmpCoord.y, 1.0, 1.0);\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" sk_FragColor.xy = sk_FragCoord.xy;\n"
	"}\n",
	&inputs);
	REPORTER_ASSERT(r, inputs.fRTHeight);

	settings.fFlipY = false;
	test(r,
	"void main() { sk_FragColor.xy = sk_FragCoord.xy; }",
	settings,
	"#version 400\n"
	"out vec4 sk_FragColor;\n"
	"void main() {\n"
	" sk_FragColor.xy = gl_FragCoord.xy;\n"
	"}\n",
	&inputs);
	REPORTER_ASSERT(r, !inputs.fRTHeight);
	}

	#endif