| #!amber |
| |
| # Copyright 2019 Google LLC |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| |
| # A test for a bug found by GraphicsFuzz. |
| |
| # Short description: A fragment shader that uses an uninitialized variable |
| |
| # The test passes because the shader always writes the color red. |
| # The update to _GLF_color.x has no effect on visible pixels. |
| |
| SHADER vertex variant_vertex_shader PASSTHROUGH |
| |
| # variant_fragment_shader is derived from the following GLSL: |
| # #version 310 es |
| # precision highp float; |
| # |
| # layout(location = 0) out vec4 _GLF_color; |
| # |
| # void main() |
| # { |
| # _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); |
| # |
| # uint foo; |
| # |
| # // For visible pixels, this is equivalent to: _GLF_color.x = _GLF_color.x; |
| # _GLF_color.x = gl_FragCoord.x > -1.0 ? _GLF_color.x : float(178493u + (--foo)); |
| # } |
| SHADER fragment variant_fragment_shader SPIRV-ASM |
| ; SPIR-V |
| ; Version: 1.0 |
| ; Generator: Khronos Glslang Reference Front End; 7 |
| ; Bound: 42 |
| ; Schema: 0 |
| OpCapability Shader |
| %1 = OpExtInstImport "GLSL.std.450" |
| OpMemoryModel Logical GLSL450 |
| OpEntryPoint Fragment %4 "main" %9 %14 |
| OpExecutionMode %4 OriginUpperLeft |
| OpSource ESSL 310 |
| OpName %4 "main" |
| OpName %9 "_GLF_color" |
| OpName %14 "gl_FragCoord" |
| OpName %33 "foo" |
| OpDecorate %9 Location 0 |
| OpDecorate %14 BuiltIn FragCoord |
| OpDecorate %33 RelaxedPrecision |
| OpDecorate %34 RelaxedPrecision |
| OpDecorate %37 RelaxedPrecision |
| OpDecorate %38 RelaxedPrecision |
| %2 = OpTypeVoid |
| %3 = OpTypeFunction %2 |
| %6 = OpTypeFloat 32 |
| %7 = OpTypeVector %6 4 |
| %8 = OpTypePointer Output %7 |
| %9 = OpVariable %8 Output |
| %10 = OpConstant %6 1 |
| %11 = OpConstant %6 0 |
| %12 = OpConstantComposite %7 %10 %11 %11 %10 |
| %13 = OpTypePointer Input %7 |
| %14 = OpVariable %13 Input |
| %15 = OpTypeInt 32 0 |
| %16 = OpConstant %15 0 |
| %17 = OpTypePointer Input %6 |
| %20 = OpConstant %6 -1 |
| %21 = OpTypeBool |
| %23 = OpTypePointer Function %6 |
| %27 = OpTypePointer Output %6 |
| %31 = OpConstant %15 178493 |
| %32 = OpTypePointer Function %15 |
| %35 = OpTypeInt 32 1 |
| %36 = OpConstant %35 1 |
| %4 = OpFunction %2 None %3 |
| %5 = OpLabel |
| %24 = OpVariable %23 Function |
| %33 = OpVariable %32 Function |
| OpStore %9 %12 |
| %18 = OpAccessChain %17 %14 %16 |
| %19 = OpLoad %6 %18 |
| %22 = OpFOrdGreaterThan %21 %19 %20 |
| OpSelectionMerge %26 None |
| OpBranchConditional %22 %25 %30 |
| %25 = OpLabel |
| %28 = OpAccessChain %27 %9 %16 |
| %29 = OpLoad %6 %28 |
| OpStore %24 %29 |
| OpBranch %26 |
| %30 = OpLabel |
| %34 = OpLoad %15 %33 |
| %37 = OpISub %15 %34 %36 |
| OpStore %33 %37 |
| %38 = OpIAdd %15 %31 %37 |
| %39 = OpConvertUToF %6 %38 |
| OpStore %24 %39 |
| OpBranch %26 |
| %26 = OpLabel |
| %40 = OpLoad %6 %24 |
| %41 = OpAccessChain %27 %9 %16 |
| OpStore %41 %40 |
| OpReturn |
| OpFunctionEnd |
| END |
| |
| # uniforms for variant |
| |
| |
| BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM |
| |
| PIPELINE graphics variant_pipeline |
| ATTACH variant_vertex_shader |
| ATTACH variant_fragment_shader |
| FRAMEBUFFER_SIZE 256 256 |
| BIND BUFFER variant_framebuffer AS color LOCATION 0 |
| END |
| CLEAR_COLOR variant_pipeline 0 0 0 255 |
| |
| CLEAR variant_pipeline |
| RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256 |
| |
| EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255 |