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 simplification 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 # layout(location = 0) out vec4 _GLF_color;
31 # layout(set = 0, binding = 0) uniform buf0
38 # // Always selects 1.0.
39 # float f = mix(1.0, 0.0, gl_FragCoord.y < 0.0);
41 # if(determinant(mat3(f)) == one)
42 # _GLF_color = vec4(1, 0, 0, 1);
44 # _GLF_color = vec4(0);
46 SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
49 ; Generator: Khronos Glslang Reference Front End; 8
53 %1 = OpExtInstImport "GLSL.std.450"
54 OpMemoryModel Logical GLSL450
55 OpEntryPoint Fragment %4 "main" %13 %42
56 OpExecutionMode %4 OriginUpperLeft
60 OpName %13 "gl_FragCoord"
62 OpMemberName %30 0 "one"
64 OpName %42 "_GLF_color"
65 OpDecorate %13 BuiltIn FragCoord
66 OpMemberDecorate %30 0 Offset 0
68 OpDecorate %32 DescriptorSet 0
69 OpDecorate %32 Binding 0
70 OpDecorate %42 Location 0
72 %3 = OpTypeFunction %2
74 %7 = OpTypePointer Function %6
77 %11 = OpTypeVector %6 4
78 %12 = OpTypePointer Input %11
79 %13 = OpVariable %12 Input
81 %15 = OpConstant %14 1
82 %16 = OpTypePointer Input %6
84 %23 = OpTypeVector %6 3
85 %24 = OpTypeMatrix %23 3
87 %31 = OpTypePointer Uniform %30
88 %32 = OpVariable %31 Uniform
90 %34 = OpConstant %33 0
91 %35 = OpTypePointer Uniform %6
92 %41 = OpTypePointer Output %11
93 %42 = OpVariable %41 Output
94 %43 = OpConstantComposite %11 %9 %10 %10 %9
95 %45 = OpConstantComposite %11 %10 %10 %10 %10
96 %4 = OpFunction %2 None %3
98 %8 = OpVariable %7 Function
99 %17 = OpAccessChain %16 %13 %15
101 %20 = OpFOrdLessThan %19 %18 %10
102 %21 = OpSelect %6 %20 %10 %9
105 %25 = OpCompositeConstruct %23 %22 %10 %10
106 %26 = OpCompositeConstruct %23 %10 %22 %10
107 %27 = OpCompositeConstruct %23 %10 %10 %22
108 %28 = OpCompositeConstruct %24 %25 %26 %27
109 %29 = OpExtInst %6 %1 Determinant %28
110 %36 = OpAccessChain %35 %32 %34
112 %38 = OpFOrdEqual %19 %29 %37
113 OpSelectionMerge %40 None
114 OpBranchConditional %38 %39 %44
126 # uniforms for variant
129 BUFFER variant_one DATA_TYPE float DATA
133 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
135 PIPELINE graphics variant_pipeline
136 ATTACH variant_vertex_shader
137 ATTACH variant_fragment_shader
138 FRAMEBUFFER_SIZE 256 256
139 BIND BUFFER variant_framebuffer AS color LOCATION 0
140 BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 0
142 CLEAR_COLOR variant_pipeline 0 0 0 255
144 CLEAR variant_pipeline
145 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
147 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255