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 instruction folding path.
22 # The test passes because 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 # layout(set = 0, binding = 0) uniform buf0
32 # vec2 injectionSwitch;
34 # layout(location = 0) out vec4 _GLF_color;
39 # if(mix(injectionSwitch, vec2(1), vec2(0)) == vec2(0, 1))
40 # _GLF_color = vec4(1, 0, 0, 1);
42 # _GLF_color = vec4(0);
44 SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
47 ; Generator: Khronos Glslang Reference Front End; 8
51 %1 = OpExtInstImport "GLSL.std.450"
52 OpMemoryModel Logical GLSL450
53 OpEntryPoint Fragment %4 "main" %30
54 OpExecutionMode %4 OriginUpperLeft
58 OpMemberName %8 0 "injectionSwitch"
60 OpName %30 "_GLF_color"
61 OpMemberDecorate %8 0 Offset 0
63 OpDecorate %10 DescriptorSet 0
64 OpDecorate %10 Binding 0
65 OpDecorate %30 Location 0
67 %3 = OpTypeFunction %2
69 %7 = OpTypeVector %6 2
71 %9 = OpTypePointer Uniform %8
72 %10 = OpVariable %9 Uniform
74 %12 = OpConstant %11 0
75 %13 = OpTypePointer Uniform %7
77 %17 = OpConstantComposite %7 %16 %16
79 %19 = OpConstantComposite %7 %18 %18
80 %21 = OpConstantComposite %7 %18 %16
82 %23 = OpTypeVector %22 2
83 %28 = OpTypeVector %6 4
84 %29 = OpTypePointer Output %28
85 %30 = OpVariable %29 Output
86 %31 = OpConstantComposite %28 %16 %18 %18 %16
87 %33 = OpConstantComposite %28 %18 %18 %18 %18
88 %4 = OpFunction %2 None %3
90 %14 = OpAccessChain %13 %10 %12
92 %20 = OpExtInst %7 %1 FMix %15 %17 %19
93 %24 = OpFOrdEqual %23 %20 %21
95 OpSelectionMerge %27 None
96 OpBranchConditional %25 %26 %32
108 # uniforms for variant
111 BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
115 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
117 PIPELINE graphics variant_pipeline
118 ATTACH variant_vertex_shader
119 ATTACH variant_fragment_shader
120 FRAMEBUFFER_SIZE 256 256
121 BIND BUFFER variant_framebuffer AS color LOCATION 0
122 BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 0
124 CLEAR_COLOR variant_pipeline 0 0 0 255
126 CLEAR variant_pipeline
127 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
129 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255