1#!amber
2
3# Copyright 2020 Google LLC
4#
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
8#
9#     http://www.apache.org/licenses/LICENSE-2.0
10#
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.
16
17
18# A test for a coverage-gap found by GraphicsFuzz.
19
20# Short description: A fragment shader that covers a specific instruction folding path.
21
22# The test passes because shader always writes red.
23
24SHADER vertex variant_vertex_shader PASSTHROUGH
25
26# variant_fragment_shader is derived from the following GLSL:
27# #version 310 es
28# precision highp float;
29#
30# layout(set = 0, binding = 0) uniform buf0
31# {
32#     vec2 injectionSwitch;
33# };
34# layout(location = 0) out vec4 _GLF_color;
35#
36# void main()
37# {
38#     // Always true.
39#     if(mix(injectionSwitch, vec2(1), vec2(0)) == vec2(0, 1))
40#         _GLF_color = vec4(1, 0, 0, 1);
41#     else
42#         _GLF_color = vec4(0);
43# }
44SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
45; SPIR-V
46; Version: 1.0
47; Generator: Khronos Glslang Reference Front End; 8
48; Bound: 34
49; Schema: 0
50               OpCapability Shader
51          %1 = OpExtInstImport "GLSL.std.450"
52               OpMemoryModel Logical GLSL450
53               OpEntryPoint Fragment %4 "main" %30
54               OpExecutionMode %4 OriginUpperLeft
55               OpSource ESSL 310
56               OpName %4 "main"
57               OpName %8 "buf0"
58               OpMemberName %8 0 "injectionSwitch"
59               OpName %10 ""
60               OpName %30 "_GLF_color"
61               OpMemberDecorate %8 0 Offset 0
62               OpDecorate %8 Block
63               OpDecorate %10 DescriptorSet 0
64               OpDecorate %10 Binding 0
65               OpDecorate %30 Location 0
66          %2 = OpTypeVoid
67          %3 = OpTypeFunction %2
68          %6 = OpTypeFloat 32
69          %7 = OpTypeVector %6 2
70          %8 = OpTypeStruct %7
71          %9 = OpTypePointer Uniform %8
72         %10 = OpVariable %9 Uniform
73         %11 = OpTypeInt 32 1
74         %12 = OpConstant %11 0
75         %13 = OpTypePointer Uniform %7
76         %16 = OpConstant %6 1
77         %17 = OpConstantComposite %7 %16 %16
78         %18 = OpConstant %6 0
79         %19 = OpConstantComposite %7 %18 %18
80         %21 = OpConstantComposite %7 %18 %16
81         %22 = OpTypeBool
82         %23 = OpTypeVector %22 2
83         %28 = OpTypeVector %6 4
84         %29 = OpTypePointer Output %28
85         %30 = OpVariable %29 Output
86         %31 = OpConstantComposite %28 %16 %18 %18 %16
87         %33 = OpConstantComposite %28 %18 %18 %18 %18
88          %4 = OpFunction %2 None %3
89          %5 = OpLabel
90         %14 = OpAccessChain %13 %10 %12
91         %15 = OpLoad %7 %14
92         %20 = OpExtInst %7 %1 FMix %15 %17 %19
93         %24 = OpFOrdEqual %23 %20 %21
94         %25 = OpAll %22 %24
95               OpSelectionMerge %27 None
96               OpBranchConditional %25 %26 %32
97         %26 = OpLabel
98               OpStore %30 %31
99               OpBranch %27
100         %32 = OpLabel
101               OpStore %30 %33
102               OpBranch %27
103         %27 = OpLabel
104               OpReturn
105               OpFunctionEnd
106END
107
108# uniforms for variant
109
110# injectionSwitch
111BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
112 0.0 1.0
113END
114
115BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
116
117PIPELINE graphics variant_pipeline
118  ATTACH variant_vertex_shader
119  ATTACH variant_fragment_shader
120  FRAMEBUFFER_SIZE 256 256
121  BIND BUFFER variant_framebuffer AS color LOCATION 0
122  BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 0
123END
124CLEAR_COLOR variant_pipeline 0 0 0 255
125
126CLEAR variant_pipeline
127RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
128
129EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
130