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 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;
29 # precision highp int;
31 # layout(location = 0) out vec4 _GLF_color;
33 # layout(set = 0, binding = 0) uniform buf0
42 # for(int i = 3; i > (i & 1); i -= one)
51 # _GLF_color = vec4(1, 0, 0, 1);
53 # _GLF_color = vec4(0);
55 SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
58 ; Generator: Khronos Glslang Reference Front End; 8
62 %1 = OpExtInstImport "GLSL.std.450"
63 OpMemoryModel Logical GLSL450
64 OpEntryPoint Fragment %4 "main" %47
65 OpExecutionMode %4 OriginUpperLeft
72 OpMemberName %28 0 "one"
74 OpName %47 "_GLF_color"
75 OpMemberDecorate %28 0 Offset 0
77 OpDecorate %30 DescriptorSet 0
78 OpDecorate %30 Binding 0
79 OpDecorate %47 Location 0
81 %3 = OpTypeFunction %2
83 %7 = OpTypeFunction %6
84 %10 = OpTypePointer Function %6
90 %29 = OpTypePointer Uniform %28
91 %30 = OpVariable %29 Uniform
92 %31 = OpTypePointer Uniform %6
95 %45 = OpTypeVector %44 4
96 %46 = OpTypePointer Output %45
97 %47 = OpVariable %46 Output
98 %48 = OpConstant %44 1
99 %49 = OpConstant %44 0
100 %50 = OpConstantComposite %45 %48 %49 %49 %48
101 %52 = OpConstantComposite %45 %49 %49 %49 %49
102 %4 = OpFunction %2 None %3
104 %39 = OpFunctionCall %6 %8
105 %41 = OpIEqual %24 %39 %40
106 OpSelectionMerge %43 None
107 OpBranchConditional %41 %42 %51
117 %8 = OpFunction %6 None %7
119 %11 = OpVariable %10 Function
120 %13 = OpVariable %10 Function
125 OpLoopMerge %17 %18 None
130 %23 = OpBitwiseAnd %6 %21 %22
131 %25 = OpSGreaterThan %24 %20 %23
132 OpBranchConditional %25 %16 %17
135 %27 = OpIAdd %6 %26 %22
139 %32 = OpAccessChain %31 %30 %12
142 %35 = OpISub %6 %34 %33
151 # uniforms for variant
154 BUFFER variant_one DATA_TYPE int32 DATA
158 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
160 PIPELINE graphics variant_pipeline
161 ATTACH variant_vertex_shader
162 ATTACH variant_fragment_shader
163 FRAMEBUFFER_SIZE 256 256
164 BIND BUFFER variant_framebuffer AS color LOCATION 0
165 BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 0
167 CLEAR_COLOR variant_pipeline 0 0 0 255
169 CLEAR variant_pipeline
170 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
172 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255