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 shader validation 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 one;
35# };
36#
37# void main()
38# {
39#     int a = 0;
40#
41#     switch(one)
42#     {
43#         case 2:
44#         case 3:
45#             a = 1;
46#         case 4:
47#             break;
48#         default:
49#             a = 2;
50#             break;
51#     }
52#
53#     if (a == 2)
54#         _GLF_color = vec4(1, 0, 0, 1);
55#     else
56#         _GLF_color = vec4(0);
57# }
58SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
59; SPIR-V
60; Version: 1.0
61; Generator: Khronos Glslang Reference Front End; 8
62; Bound: 39
63; Schema: 0
64               OpCapability Shader
65          %1 = OpExtInstImport "GLSL.std.450"
66               OpMemoryModel Logical GLSL450
67               OpEntryPoint Fragment %4 "main" %33
68               OpExecutionMode %4 OriginUpperLeft
69               OpSource ESSL 310
70               OpName %4 "main"
71               OpName %8 "a"
72               OpName %10 "buf0"
73               OpMemberName %10 0 "one"
74               OpName %12 ""
75               OpName %33 "_GLF_color"
76               OpMemberDecorate %10 0 Offset 0
77               OpDecorate %10 Block
78               OpDecorate %12 DescriptorSet 0
79               OpDecorate %12 Binding 0
80               OpDecorate %33 Location 0
81          %2 = OpTypeVoid
82          %3 = OpTypeFunction %2
83          %6 = OpTypeInt 32 1
84          %7 = OpTypePointer Function %6
85          %9 = OpConstant %6 0
86         %10 = OpTypeStruct %6
87         %11 = OpTypePointer Uniform %10
88         %12 = OpVariable %11 Uniform
89         %13 = OpTypePointer Uniform %6
90         %20 = OpConstant %6 1
91         %22 = OpConstant %6 2
92         %26 = OpTypeBool
93         %30 = OpTypeFloat 32
94         %31 = OpTypeVector %30 4
95         %32 = OpTypePointer Output %31
96         %33 = OpVariable %32 Output
97         %34 = OpConstant %30 1
98         %35 = OpConstant %30 0
99         %36 = OpConstantComposite %31 %34 %35 %35 %34
100         %38 = OpConstantComposite %31 %35 %35 %35 %35
101          %4 = OpFunction %2 None %3
102          %5 = OpLabel
103          %8 = OpVariable %7 Function
104               OpStore %8 %9
105         %14 = OpAccessChain %13 %12 %9
106         %15 = OpLoad %6 %14
107               OpSelectionMerge %19 None
108               OpSwitch %15 %18 2 %16 3 %16 4 %17
109         %18 = OpLabel
110               OpStore %8 %22
111               OpBranch %19
112         %16 = OpLabel
113               OpStore %8 %20
114               OpBranch %17
115         %17 = OpLabel
116               OpBranch %19
117         %19 = OpLabel
118         %25 = OpLoad %6 %8
119         %27 = OpIEqual %26 %25 %22
120               OpSelectionMerge %29 None
121               OpBranchConditional %27 %28 %37
122         %28 = OpLabel
123               OpStore %33 %36
124               OpBranch %29
125         %37 = OpLabel
126               OpStore %33 %38
127               OpBranch %29
128         %29 = OpLabel
129               OpReturn
130               OpFunctionEnd
131END
132
133# uniforms for variant
134
135# one
136BUFFER variant_one DATA_TYPE int32 DATA
137 1
138END
139
140BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
141
142PIPELINE graphics variant_pipeline
143  ATTACH variant_vertex_shader
144  ATTACH variant_fragment_shader
145  FRAMEBUFFER_SIZE 256 256
146  BIND BUFFER variant_framebuffer AS color LOCATION 0
147  BIND BUFFER variant_one AS uniform DESCRIPTOR_SET 0 BINDING 0
148END
149CLEAR_COLOR variant_pipeline 0 0 0 255
150
151CLEAR variant_pipeline
152RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
153
154EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
155