1#!amber 2 3# Copyright 2020 Google LLC 4# 5# Licensed under the Apache License, Version 2.0 (the "License"); 6# you may not use this file except in compliance with the License. 7# You may obtain a copy of the License at 8# 9# http://www.apache.org/licenses/LICENSE-2.0 10# 11# Unless required by applicable law or agreed to in writing, software 12# distributed under the License is distributed on an "AS IS" BASIS, 13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14# See the License for the specific language governing permissions and 15# limitations under the License. 16 17 18# A test for a coverage-gap found by GraphicsFuzz. 19 20# Short description: A fragment shader that covers a specific constant folding path 21 22# The test passes because shader always writes red. 23 24SHADER vertex variant_vertex_shader PASSTHROUGH 25 26# variant_fragment_shader is derived from the following GLSL: 27# #version 310 es 28# precision highp float; 29# 30# layout(location = 0) out vec4 _GLF_color; 31# 32# layout(set = 0, binding = 0) uniform buf0 33# { 34# float one; 35# }; 36# 37# void main() 38# { 39# _GLF_color = vec4(0); 40# 41# float f = clamp(one, 1.0, 1.0); 42# 43# if (f > one) // Always false. 44# _GLF_color = vec4(0); 45# else 46# _GLF_color = vec4(f, 0, 0, 1); 47# } 48SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0 49; SPIR-V 50; Version: 1.0 51; Generator: Khronos Glslang Reference Front End; 8 52; Bound: 34 53; Schema: 0 54 OpCapability Shader 55 %1 = OpExtInstImport "GLSL.std.450" 56 OpMemoryModel Logical GLSL450 57 OpEntryPoint Fragment %4 "main" %9 58 OpExecutionMode %4 OriginUpperLeft 59 OpSource ESSL 310 60 OpName %4 "main" 61 OpName %9 "_GLF_color" 62 OpName %13 "f" 63 OpName %14 "buf0" 64 OpMemberName %14 0 "one" 65 OpName %16 "" 66 OpDecorate %9 Location 0 67 OpMemberDecorate %14 0 Offset 0 68 OpDecorate %14 Block 69 OpDecorate %16 DescriptorSet 0 70 OpDecorate %16 Binding 0 71 %2 = OpTypeVoid 72 %3 = OpTypeFunction %2 73 %6 = OpTypeFloat 32 74 %7 = OpTypeVector %6 4 75 %8 = OpTypePointer Output %7 76 %9 = OpVariable %8 Output 77 %10 = OpConstant %6 0 78 %11 = OpConstantComposite %7 %10 %10 %10 %10 79 %12 = OpTypePointer Function %6 80 %14 = OpTypeStruct %6 81 %15 = OpTypePointer Uniform %14 82 %16 = OpVariable %15 Uniform 83 %17 = OpTypeInt 32 1 84 %18 = OpConstant %17 0 85 %19 = OpTypePointer Uniform %6 86 %22 = OpConstant %6 1 87 %27 = OpTypeBool 88 %4 = OpFunction %2 None %3 89 %5 = OpLabel 90 %13 = OpVariable %12 Function 91 OpStore %9 %11 92 %20 = OpAccessChain %19 %16 %18 93 %21 = OpLoad %6 %20 94 %23 = OpExtInst %6 %1 FClamp %21 %22 %22 95 OpStore %13 %23 96 %24 = OpLoad %6 %13 97 %25 = OpAccessChain %19 %16 %18 98 %26 = OpLoad %6 %25 99 %28 = OpFOrdGreaterThan %27 %24 %26 100 OpSelectionMerge %30 None 101 OpBranchConditional %28 %29 %31 102 %29 = OpLabel 103 OpStore %9 %11 104 OpBranch %30 105 %31 = OpLabel 106 %32 = OpLoad %6 %13 107 %33 = OpCompositeConstruct %7 %32 %10 %10 %22 108 OpStore %9 %33 109 OpBranch %30 110 %30 = OpLabel 111 OpReturn 112 OpFunctionEnd 113END 114 115# uniforms for variant 116 117# one 118BUFFER variant_one DATA_TYPE float DATA 119 1.0 120END 121 122BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM 123 124PIPELINE graphics variant_pipeline 125 ATTACH variant_vertex_shader 126 ATTACH variant_fragment_shader 127 FRAMEBUFFER_SIZE 256 256 128 BIND BUFFER variant_framebuffer AS color LOCATION 0 129 BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 0 130END 131CLEAR_COLOR variant_pipeline 0 0 0 255 132 133CLEAR variant_pipeline 134RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256 135 136EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255 137