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 constant folding 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 # precision highp int;
32 # layout(location = 0) out vec4 _GLF_color;
34 # layout(set = 0, binding = 0) uniform buf0
41 # vec4 v = ceil(vec4(424.113, quarter, 1.3, 19.62));
43 # if (v == vec4(425.0, 1.0, 2.0, 20.0))
44 # _GLF_color = vec4(1, 0, 0, 1);
46 # _GLF_color = vec4(0);
48 SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
51 ; Generator: Khronos Glslang Reference Front End; 8
55 %1 = OpExtInstImport "GLSL.std.450"
56 OpMemoryModel Logical GLSL450
57 OpEntryPoint Fragment %4 "main" %36
58 OpExecutionMode %4 OriginUpperLeft
63 OpMemberName %11 0 "quarter"
65 OpName %36 "_GLF_color"
66 OpMemberDecorate %11 0 Offset 0
68 OpDecorate %13 DescriptorSet 0
69 OpDecorate %13 Binding 0
70 OpDecorate %36 Location 0
72 %3 = OpTypeFunction %2
74 %7 = OpTypeVector %6 4
75 %8 = OpTypePointer Function %7
76 %10 = OpConstant %6 424.113007
78 %12 = OpTypePointer Uniform %11
79 %13 = OpVariable %12 Uniform
81 %15 = OpConstant %14 0
82 %16 = OpTypePointer Uniform %6
83 %19 = OpConstant %6 1.29999995
84 %20 = OpConstant %6 19.6200008
85 %24 = OpConstant %6 425
88 %27 = OpConstant %6 20
89 %28 = OpConstantComposite %7 %24 %25 %26 %27
91 %30 = OpTypeVector %29 4
92 %35 = OpTypePointer Output %7
93 %36 = OpVariable %35 Output
95 %38 = OpConstantComposite %7 %25 %37 %37 %25
96 %40 = OpConstantComposite %7 %37 %37 %37 %37
97 %4 = OpFunction %2 None %3
99 %9 = OpVariable %8 Function
100 %17 = OpAccessChain %16 %13 %15
102 %21 = OpCompositeConstruct %7 %10 %18 %19 %20
103 %22 = OpExtInst %7 %1 Ceil %21
106 %31 = OpFOrdEqual %30 %23 %28
108 OpSelectionMerge %34 None
109 OpBranchConditional %32 %33 %39
121 # uniforms for variant
124 BUFFER variant_quarter DATA_TYPE float DATA
128 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
130 PIPELINE graphics variant_pipeline
131 ATTACH variant_vertex_shader
132 ATTACH variant_fragment_shader
133 FRAMEBUFFER_SIZE 256 256
134 BIND BUFFER variant_framebuffer AS color LOCATION 0
135 BIND BUFFER variant_quarter AS uniform DESCRIPTOR_SET 0 BINDING 0
137 CLEAR_COLOR variant_pipeline 0 0 0 255
139 CLEAR variant_pipeline
140 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
142 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255