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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 AP float code 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# precision highp int;
30#
31# layout(location = 0) out vec4 _GLF_color;
32# layout(set = 0, binding = 0) uniform buf0
33# {
34#     int two;
35# };
36#
37# void main()
38# {
39#     vec2 v = acos(ldexp(vec2(0.1), ivec2(two, 3)));
40#     float d = distance(v, vec2(1.15928, 0.64350));
41#
42#     if (d < 0.01)
43#         _GLF_color = vec4(1, 0, 0, 1);
44#     else
45#         _GLF_color = vec4(0);
46# }
47SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
48; SPIR-V
49; Version: 1.0
50; Generator: Khronos Glslang Reference Front End; 8
51; Bound: 46
52; Schema: 0
53               OpCapability Shader
54          %1 = OpExtInstImport "GLSL.std.450"
55               OpMemoryModel Logical GLSL450
56               OpEntryPoint Fragment %4 "main" %40
57               OpExecutionMode %4 OriginUpperLeft
58               OpSource ESSL 310
59               OpName %4 "main"
60               OpName %9 "v"
61               OpName %13 "buf0"
62               OpMemberName %13 0 "two"
63               OpName %15 ""
64               OpName %26 "d"
65               OpName %40 "_GLF_color"
66               OpMemberDecorate %13 0 Offset 0
67               OpDecorate %13 Block
68               OpDecorate %15 DescriptorSet 0
69               OpDecorate %15 Binding 0
70               OpDecorate %40 Location 0
71          %2 = OpTypeVoid
72          %3 = OpTypeFunction %2
73          %6 = OpTypeFloat 32
74          %7 = OpTypeVector %6 2
75          %8 = OpTypePointer Function %7
76         %10 = OpConstant %6 0.100000001
77         %11 = OpConstantComposite %7 %10 %10
78         %12 = OpTypeInt 32 1
79         %13 = OpTypeStruct %12
80         %14 = OpTypePointer Uniform %13
81         %15 = OpVariable %14 Uniform
82         %16 = OpConstant %12 0
83         %17 = OpTypePointer Uniform %12
84         %20 = OpConstant %12 3
85         %21 = OpTypeVector %12 2
86         %25 = OpTypePointer Function %6
87         %28 = OpConstant %6 1.15927994
88         %29 = OpConstant %6 0.64349997
89         %30 = OpConstantComposite %7 %28 %29
90         %33 = OpConstant %6 0.00999999978
91         %34 = OpTypeBool
92         %38 = OpTypeVector %6 4
93         %39 = OpTypePointer Output %38
94         %40 = OpVariable %39 Output
95         %41 = OpConstant %6 1
96         %42 = OpConstant %6 0
97         %43 = OpConstantComposite %38 %41 %42 %42 %41
98         %45 = OpConstantComposite %38 %42 %42 %42 %42
99          %4 = OpFunction %2 None %3
100          %5 = OpLabel
101          %9 = OpVariable %8 Function
102         %26 = OpVariable %25 Function
103         %18 = OpAccessChain %17 %15 %16
104         %19 = OpLoad %12 %18
105         %22 = OpCompositeConstruct %21 %19 %20
106         %23 = OpExtInst %7 %1 Ldexp %11 %22
107         %24 = OpExtInst %7 %1 Acos %23
108               OpStore %9 %24
109         %27 = OpLoad %7 %9
110         %31 = OpExtInst %6 %1 Distance %27 %30
111               OpStore %26 %31
112         %32 = OpLoad %6 %26
113         %35 = OpFOrdLessThan %34 %32 %33
114               OpSelectionMerge %37 None
115               OpBranchConditional %35 %36 %44
116         %36 = OpLabel
117               OpStore %40 %43
118               OpBranch %37
119         %44 = OpLabel
120               OpStore %40 %45
121               OpBranch %37
122         %37 = OpLabel
123               OpReturn
124               OpFunctionEnd
125END
126
127# uniforms for variant
128
129# two
130BUFFER variant_two DATA_TYPE int32 DATA
131 2
132END
133
134BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
135
136PIPELINE graphics variant_pipeline
137  ATTACH variant_vertex_shader
138  ATTACH variant_fragment_shader
139  FRAMEBUFFER_SIZE 256 256
140  BIND BUFFER variant_framebuffer AS color LOCATION 0
141  BIND BUFFER variant_two AS uniform DESCRIPTOR_SET 0 BINDING 0
142END
143CLEAR_COLOR variant_pipeline 0 0 0 255
144
145CLEAR variant_pipeline
146RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
147
148EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
149