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 const folding rule 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(location = 0) out vec4 _GLF_color;
34 # layout(set = 0, binding = 0) uniform buf0
41 # if (vec4(clamp(2.0, zero, 1.0), clamp(-1.0, 0.0, zero), 0, 1) != vec4(1, 0, 0, 1))
42 # _GLF_color = vec4(0);
44 # _GLF_color = vec4(1, 0, 0, 1);
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" %33
56 OpExecutionMode %4 OriginUpperLeft
60 OpMemberName %8 0 "zero"
62 OpName %33 "_GLF_color"
63 OpMemberDecorate %8 0 Offset 0
65 OpDecorate %10 DescriptorSet 0
66 OpDecorate %10 Binding 0
67 OpDecorate %33 Location 0
69 %3 = OpTypeFunction %2
73 %9 = OpTypePointer Uniform %8
74 %10 = OpVariable %9 Uniform
76 %12 = OpConstant %11 0
77 %13 = OpTypePointer Uniform %6
79 %18 = OpConstant %6 -1
81 %23 = OpTypeVector %6 4
82 %25 = OpConstantComposite %23 %16 %19 %19 %16
84 %27 = OpTypeVector %26 4
85 %32 = OpTypePointer Output %23
86 %33 = OpVariable %32 Output
87 %34 = OpConstantComposite %23 %19 %19 %19 %19
88 %4 = OpFunction %2 None %3
90 %14 = OpAccessChain %13 %10 %12
92 %17 = OpExtInst %6 %1 FClamp %7 %15 %16
93 %20 = OpAccessChain %13 %10 %12
95 %22 = OpExtInst %6 %1 FClamp %18 %19 %21
96 %24 = OpCompositeConstruct %23 %17 %22 %19 %16
97 %28 = OpFOrdNotEqual %27 %24 %25
99 OpSelectionMerge %31 None
100 OpBranchConditional %29 %30 %35
112 # uniforms for variant
115 BUFFER variant_zero DATA_TYPE float DATA
119 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
121 PIPELINE graphics variant_pipeline
122 ATTACH variant_vertex_shader
123 ATTACH variant_fragment_shader
124 FRAMEBUFFER_SIZE 256 256
125 BIND BUFFER variant_framebuffer AS color LOCATION 0
126 BIND BUFFER variant_zero AS uniform DESCRIPTOR_SET 0 BINDING 0
128 CLEAR_COLOR variant_pipeline 0 0 0 255
130 CLEAR variant_pipeline
131 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
133 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255