3 # Copyright 2020 Google LLC
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
9 # http://www.apache.org/licenses/LICENSE-2.0
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.
18 # A test for a coverage-gap found by GraphicsFuzz.
20 # Short description: A fragment shader that covers a specific constant folding code path
22 # The test passes because the shader always writes red.
24 SHADER vertex variant_vertex_shader PASSTHROUGH
26 # variant_fragment_shader is derived from the following GLSL:
28 # precision highp float;
30 # precision highp int;
32 # layout(location = 0) out vec4 _GLF_color;
34 # layout(set = 0, binding = 0) uniform buf0
41 # _GLF_color = vec4(0);
44 # if(one < 0.0 || one < 1.0)
52 # _GLF_color = vec4(1);
58 # _GLF_color = vec4(1, 0, 0, 1);
61 SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
64 ; Generator: Khronos Glslang Reference Front End; 8
68 %1 = OpExtInstImport "GLSL.std.450"
69 OpMemoryModel Logical GLSL450
70 OpEntryPoint Fragment %4 "main" %9
71 OpExecutionMode %4 OriginUpperLeft
74 OpName %9 "_GLF_color"
76 OpMemberName %13 0 "one"
78 OpDecorate %9 Location 0
79 OpMemberDecorate %13 0 Offset 0
81 OpDecorate %15 DescriptorSet 0
82 OpDecorate %15 Binding 0
84 %3 = OpTypeFunction %2
86 %7 = OpTypeVector %6 4
87 %8 = OpTypePointer Output %7
88 %9 = OpVariable %8 Output
90 %11 = OpConstantComposite %7 %10 %10 %10 %10
93 %14 = OpTypePointer Uniform %13
94 %15 = OpVariable %14 Uniform
96 %17 = OpConstant %16 0
97 %18 = OpTypePointer Uniform %6
99 %46 = OpConstantComposite %7 %27 %27 %27 %27
100 %49 = OpConstantComposite %7 %27 %10 %10 %27
101 %4 = OpFunction %2 None %3
104 %19 = OpAccessChain %18 %15 %17
106 %21 = OpFOrdLessThan %12 %20 %10
107 %22 = OpLogicalNot %12 %21
108 OpSelectionMerge %24 None
109 OpBranchConditional %22 %23 %24
111 %25 = OpAccessChain %18 %15 %17
113 %28 = OpFOrdLessThan %12 %26 %27
116 %29 = OpPhi %12 %21 %5 %28 %23
117 OpSelectionMerge %31 None
118 OpBranchConditional %29 %30 %31
122 %33 = OpAccessChain %18 %15 %17
124 %35 = OpFOrdLessThan %12 %34 %10
125 OpSelectionMerge %37 None
126 OpBranchConditional %35 %36 %48
130 OpLoopMerge %40 %41 None
133 %43 = OpAccessChain %18 %15 %17
135 %45 = OpFOrdLessThan %12 %44 %10
136 OpBranchConditional %45 %39 %40
152 # uniforms for variant
155 BUFFER variant_one DATA_TYPE float DATA
159 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
161 PIPELINE graphics variant_pipeline
162 ATTACH variant_vertex_shader
163 ATTACH variant_fragment_shader
164 FRAMEBUFFER_SIZE 256 256
165 BIND BUFFER variant_framebuffer AS color LOCATION 0
166 BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 0
168 CLEAR_COLOR variant_pipeline 0 0 0 255
170 CLEAR variant_pipeline
171 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
173 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255