3 # Copyright 2019 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 # precision highp int;
32 # layout(set = 0, binding = 0) uniform buf0
36 # layout(location = 0) out vec4 _GLF_color;
40 # // If condition is always true.
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" %22
56 OpExecutionMode %4 OriginUpperLeft
60 OpMemberName %7 0 "one"
62 OpName %22 "_GLF_color"
63 OpMemberDecorate %7 0 Offset 0
65 OpDecorate %9 DescriptorSet 0
66 OpDecorate %9 Binding 0
67 OpDecorate %22 Location 0
69 %3 = OpTypeFunction %2
72 %8 = OpTypePointer Uniform %7
73 %9 = OpVariable %8 Uniform
75 %11 = OpTypePointer Uniform %6
78 %20 = OpTypeVector %19 4
79 %21 = OpTypePointer Output %20
80 %22 = OpVariable %21 Output
81 %23 = OpConstant %19 1
82 %24 = OpConstant %19 0
83 %25 = OpConstantComposite %20 %23 %24 %24 %23
84 %27 = OpConstantComposite %20 %24 %24 %24 %24
85 %4 = OpFunction %2 None %3
87 %12 = OpAccessChain %11 %9 %10
89 %14 = OpBitwiseAnd %6 %13 %10
90 %16 = OpIEqual %15 %14 %10
91 OpSelectionMerge %18 None
92 OpBranchConditional %16 %17 %26
104 # uniforms for variant
107 BUFFER variant_one DATA_TYPE int32 DATA
111 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
113 PIPELINE graphics variant_pipeline
114 ATTACH variant_vertex_shader
115 ATTACH variant_fragment_shader
116 FRAMEBUFFER_SIZE 256 256
117 BIND BUFFER variant_framebuffer AS color LOCATION 0
118 BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 0
120 CLEAR_COLOR variant_pipeline 0 0 0 255
122 CLEAR variant_pipeline
123 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
125 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255