| // |
| // Copyright (c) 2016 The ANGLE Project Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| // |
| // WEBGL_multiview_test.cpp: |
| // Test that shaders with gl_ViewID_OVR are validated correctly. |
| // |
| |
| #include "angle_gl.h" |
| #include "gtest/gtest.h" |
| #include "GLSLANG/ShaderLang.h" |
| #include "tests/test_utils/ShaderCompileTreeTest.h" |
| |
| using namespace sh; |
| |
| class WEBGLMultiviewVertexShaderTest : public ShaderCompileTreeTest |
| { |
| public: |
| WEBGLMultiviewVertexShaderTest() {} |
| protected: |
| ::GLenum getShaderType() const override { return GL_VERTEX_SHADER; } |
| ShShaderSpec getShaderSpec() const override { return SH_WEBGL3_SPEC; } |
| void initResources(ShBuiltInResources *resources) override |
| { |
| resources->OVR_multiview = 1; |
| resources->MaxViewsOVR = 4; |
| } |
| }; |
| |
| class WEBGLMultiviewFragmentShaderTest : public ShaderCompileTreeTest |
| { |
| public: |
| WEBGLMultiviewFragmentShaderTest() {} |
| protected: |
| ::GLenum getShaderType() const override { return GL_FRAGMENT_SHADER; } |
| ShShaderSpec getShaderSpec() const override { return SH_WEBGL3_SPEC; } |
| void initResources(ShBuiltInResources *resources) override |
| { |
| resources->OVR_multiview = 1; |
| resources->MaxViewsOVR = 4; |
| } |
| }; |
| |
| // Invalid combination of extensions (restricted in the WEBGL_multiview spec). |
| TEST_F(WEBGLMultiviewVertexShaderTest, InvalidBothMultiviewAndMultiview2) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "#extension GL_OVR_multiview2 : enable\n" |
| "layout(num_views = 2) in;\n" |
| "void main()\n" |
| "{\n" |
| " gl_Position.x = (gl_ViewID_OVR == 0u) ? 1.0 : 0.0;\n" |
| " gl_Position.yzw = vec3(0, 0, 1);\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
| |
| // Invalid combination of non-matching num_views declarations. |
| TEST_F(WEBGLMultiviewVertexShaderTest, InvalidNumViewsMismatch) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview2 : require\n" |
| "layout(num_views = 2) in;\n" |
| "layout(num_views = 1) in;\n" |
| "void main()\n" |
| "{\n" |
| " gl_Position.x = (gl_ViewID_OVR == 0u) ? 1.0 : 0.0;\n" |
| " gl_Position.yzw = vec3(0, 0, 1);\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
| |
| // Invalid value zero for num_views. |
| TEST_F(WEBGLMultiviewVertexShaderTest, InvalidNumViewsZero) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview2 : require\n" |
| "layout(num_views = 0) in;\n" |
| "void main()\n" |
| "{\n" |
| " gl_Position.x = (gl_ViewID_OVR == 0u) ? 1.0 : 0.0;\n" |
| " gl_Position.yzw = vec3(0, 0, 1);\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
| |
| // Too large value for num_views. |
| TEST_F(WEBGLMultiviewVertexShaderTest, InvalidNumViewsGreaterThanMax) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview2 : require\n" |
| "layout(num_views = 5) in;\n" |
| "void main()\n" |
| "{\n" |
| " gl_Position.x = (gl_ViewID_OVR == 0u) ? 1.0 : 0.0;\n" |
| " gl_Position.yzw = vec3(0, 0, 1);\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
| |
| // Valid use of gl_ViewID_OVR in a ternary operator. |
| TEST_F(WEBGLMultiviewVertexShaderTest, ValidViewIDInTernary) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "layout(num_views = 2) in;\n" |
| "layout(num_views = 2) in; // Duplicated on purpose\n" |
| "void main()\n" |
| "{\n" |
| " gl_Position.x = (gl_ViewID_OVR == 0u) ? 1.0 : 0.0;\n" |
| " gl_Position.yzw = vec3(0, 0, 1);\n" |
| "}\n"; |
| if (!compile(shaderString)) |
| { |
| FAIL() << "Shader compilation failed, expecting success:\n" << mInfoLog; |
| } |
| } |
| |
| // Valid use of gl_ViewID_OVR in an if statement. |
| TEST_F(WEBGLMultiviewVertexShaderTest, ValidViewIDInIf) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "layout(num_views = 2) in;\n" |
| "void main()\n" |
| "{\n" |
| " if (gl_ViewID_OVR == 0u)\n" |
| " {\n" |
| " gl_Position.x = 1.0;\n" |
| " }\n" |
| " else\n" |
| " {\n" |
| " gl_Position.x = 1.0;\n" |
| " }\n" |
| " gl_Position.yzw = vec3(0, 0, 1);\n" |
| "}\n"; |
| if (!compile(shaderString)) |
| { |
| FAIL() << "Shader compilation failed, expecting success:\n" << mInfoLog; |
| } |
| } |
| |
| // Valid normal write of gl_Position in addition to the write that's dependent on gl_ViewID_OVR. |
| TEST_F(WEBGLMultiviewVertexShaderTest, ValidWriteOfGlPosition) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "layout(num_views = 2) in;\n" |
| "void main()\n" |
| "{\n" |
| " if (0u == gl_ViewID_OVR)\n" |
| " {\n" |
| " gl_Position.x = 1.0;\n" |
| " }\n" |
| " else\n" |
| " {\n" |
| " gl_Position.x = 1.0;\n" |
| " }\n" |
| " gl_Position = vec4(1, 1, 1, 1);\n" |
| "}\n"; |
| if (!compile(shaderString)) |
| { |
| FAIL() << "Shader compilation failed, expecting success:\n" << mInfoLog; |
| } |
| } |
| |
| // Invalid assignment to gl_Position.y inside if dependent on gl_ViewID_OVR. |
| TEST_F(WEBGLMultiviewVertexShaderTest, InvalidGlPositionAssignmentInIf) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "layout(num_views = 2) in;\n" |
| "void main()\n" |
| "{\n" |
| " if (gl_ViewID_OVR == 0u)\n" |
| " {\n" |
| " gl_Position.y = 1.0;\n" |
| " }\n" |
| " else\n" |
| " {\n" |
| " gl_Position.y = 1.0;\n" |
| " }\n" |
| " gl_Position.xzw = vec3(0, 0, 1);\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
| |
| // Invalid multiple assignments inside if dependent on gl_ViewID_OVR. |
| TEST_F(WEBGLMultiviewVertexShaderTest, InvalidMultipleGlPositionXAssignmentsInIf) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "layout(num_views = 2) in;\n" |
| "void main()\n" |
| "{\n" |
| " if (gl_ViewID_OVR == 0u)\n" |
| " {\n" |
| " gl_Position.x = 1.0;\n" |
| " gl_Position.x = 2.0;\n" |
| " }\n" |
| " else\n" |
| " {\n" |
| " gl_Position.x = 1.0;\n" |
| " }\n" |
| " gl_Position.yzw = vec3(0, 0, 1);\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
| |
| // Invalid read of gl_Position |
| TEST_F(WEBGLMultiviewVertexShaderTest, InvalidReadOfGlPosition) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "layout(num_views = 2) in;\n" |
| "void main()\n" |
| "{\n" |
| " if (gl_ViewID_OVR == 0u) {\n" |
| " gl_Position.x = 1.0;\n" |
| " } else {\n" |
| " gl_Position.x = 1.0;\n" |
| " }\n" |
| " gl_Position.yzw = vec3(0, 0, 1);\n" |
| " float f = gl_Position.y;\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
| |
| // Read gl_Position when the shader does not refer to gl_ViewID_OVR. |
| TEST_F(WEBGLMultiviewVertexShaderTest, ValidReadOfGlPosition) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "layout(num_views = 2) in;\n" |
| "uniform float u;\n" |
| "void main()\n" |
| "{\n" |
| " gl_Position = vec4(0, 0, 0, 1);\n" |
| " gl_Position.y = gl_Position.x * u;\n" |
| "}\n"; |
| if (!compile(shaderString)) |
| { |
| FAIL() << "Shader compilation failed, expecting success:\n" << mInfoLog; |
| } |
| } |
| |
| // Read gl_FragCoord in a OVR_multiview fragment shader. |
| TEST_F(WEBGLMultiviewFragmentShaderTest, InvalidReadOfFragCoord) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "precision highp float;\n" |
| "out vec4 outColor;\n" |
| "void main()\n" |
| "{\n" |
| " outColor = vec4(gl_FragCoord.xy, 0, 1);\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
| |
| // Read gl_ViewID_OVR in an OVR_multiview fragment shader. |
| TEST_F(WEBGLMultiviewFragmentShaderTest, InvalidReadOfViewID) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "precision highp float;\n" |
| "out vec4 outColor;\n" |
| "void main()\n" |
| "{\n" |
| " outColor = vec4(gl_ViewID_OVR, 0, 0, 1);\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
| |
| // Tricky invalid read of view ID. |
| TEST_F(WEBGLMultiviewVertexShaderTest, InvalidConsumingExpressionForAssignGLPositionX) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "layout(num_views = 2) in;\n" |
| "void main()\n" |
| "{\n" |
| " float f = (gl_Position.x = (gl_ViewID_OVR == 0u) ? 1.0 : 0.0);\n" |
| " gl_Position.yzw = vec3(f, f, f);\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
| |
| // Using the OVR_multiview2 extension directive lifts restrictions of OVR_multiview. |
| TEST_F(WEBGLMultiviewVertexShaderTest, RestrictionsLiftedMultiview2) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview2 : require\n" |
| "layout(num_views = 2) in;\n" |
| "out float out_f;\n" |
| "void main()\n" |
| "{\n" |
| " if (gl_ViewID_OVR == 0u)\n" |
| " {\n" |
| " gl_Position.x = 1.0;\n" |
| " gl_Position.x = 2.0;\n" |
| " }\n" |
| " else\n" |
| " {\n" |
| " gl_Position.x = 1.0;\n" |
| " }\n" |
| " gl_Position.yzw = vec3(0, 0, 1);\n" |
| " gl_Position += vec4(1, 0, 0, 1);\n" |
| " out_f = float(gl_ViewID_OVR * 2u);\n" |
| "}\n"; |
| if (!compile(shaderString)) |
| { |
| FAIL() << "Shader compilation failed, expecting success:\n" << mInfoLog; |
| } |
| } |
| |
| // Correct use of GL_OVR_multiview macros. |
| TEST_F(WEBGLMultiviewVertexShaderTest, ValidUseOfExtensionMacros) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#ifdef GL_OVR_multiview\n" |
| "#ifdef GL_OVR_multiview2\n" |
| "#if (GL_OVR_multiview == 1) && (GL_OVR_multiview2 == 1)\n" |
| "void main()\n" |
| "{\n" |
| " gl_Position = vec4(0.0, 0.0, 0.0, 1.0);\n" |
| "}\n" |
| "#endif\n" |
| "#endif\n" |
| "#endif\n"; |
| if (!compile(shaderString)) |
| { |
| FAIL() << "Shader compilation failed, expecting success:\n" << mInfoLog; |
| } |
| } |
| |
| // Test that the parent node is tracked correctly when validating assignment to gl_Position. |
| TEST_F(WEBGLMultiviewVertexShaderTest, AssignmentWithViewIDInsideAssignment) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview : require\n" |
| "void main()\n" |
| "{\n" |
| " gl_Position.y = (gl_Position.x = (gl_ViewID_OVR == 0u) ? 1.0 : 0.0);\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
| |
| // Test that gl_ViewID_OVR can't be used as an l-value. |
| TEST_F(WEBGLMultiviewVertexShaderTest, ViewIdAsLValue) |
| { |
| const std::string &shaderString = |
| "#version 300 es\n" |
| "#extension GL_OVR_multiview2 : require\n" |
| "void foo(out uint u)\n" |
| "{\n" |
| " u = 3u;\n" |
| "}\n" |
| "void main()\n" |
| "{\n" |
| " foo(gl_ViewID_OVR);\n" |
| " gl_Position = vec4(0.0, 0.0, 0.0, 1.0);\n" |
| "}\n"; |
| if (compile(shaderString)) |
| { |
| FAIL() << "Shader compilation succeeded, expecting failure:\n" << mInfoLog; |
| } |
| } |
