1#!amber
2
3# Copyright 2019 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 bug found by GraphicsFuzz.
19
20# Short description: A fragment shader with a switch, if, and discard
21
22# The test passes because the shader always writes the color red;
23# the switch is always skipped.
24
25SHADER vertex variant_vertex_shader PASSTHROUGH
26
27# variant_fragment_shader is derived from the following GLSL:
28# #version 310 es
29# precision highp float;
30#
31# layout(set = 0, binding = 0) uniform buf0
32# {
33#   vec2 injectionSwitch;
34# };
35#
36# layout(location = 0) out vec4 _GLF_color;
37#
38# void main()
39# {
40#   switch (int(injectionSwitch.y)) // always 1
41#   {
42#   case -1:
43#     if (injectionSwitch.y > injectionSwitch.x)
44#     {
45#       discard;
46#     }
47#   }
48#   _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
49# }
50SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
51; SPIR-V
52; Version: 1.0
53; Generator: Khronos Glslang Reference Front End; 7
54; Bound: 38
55; Schema: 0
56               OpCapability Shader
57          %1 = OpExtInstImport "GLSL.std.450"
58               OpMemoryModel Logical GLSL450
59               OpEntryPoint Fragment %4 "main" %34
60               OpExecutionMode %4 OriginUpperLeft
61               OpSource ESSL 310
62               OpName %4 "main"
63               OpName %8 "buf0"
64               OpMemberName %8 0 "injectionSwitch"
65               OpName %10 ""
66               OpName %34 "_GLF_color"
67               OpMemberDecorate %8 0 Offset 0
68               OpDecorate %8 Block
69               OpDecorate %10 DescriptorSet 0
70               OpDecorate %10 Binding 0
71               OpDecorate %34 Location 0
72          %2 = OpTypeVoid
73          %3 = OpTypeFunction %2
74          %6 = OpTypeFloat 32
75          %7 = OpTypeVector %6 2
76          %8 = OpTypeStruct %7
77          %9 = OpTypePointer Uniform %8
78         %10 = OpVariable %9 Uniform
79         %11 = OpTypeInt 32 1
80         %12 = OpConstant %11 0
81         %13 = OpTypeInt 32 0
82         %14 = OpConstant %13 1
83         %15 = OpTypePointer Uniform %6
84         %23 = OpConstant %13 0
85         %26 = OpTypeBool
86         %32 = OpTypeVector %6 4
87         %33 = OpTypePointer Output %32
88         %34 = OpVariable %33 Output
89         %35 = OpConstant %6 1
90         %36 = OpConstant %6 0
91         %37 = OpConstantComposite %32 %35 %36 %36 %35
92          %4 = OpFunction %2 None %3
93          %5 = OpLabel
94         %16 = OpAccessChain %15 %10 %12 %14
95         %17 = OpLoad %6 %16
96         %18 = OpConvertFToS %11 %17
97               OpSelectionMerge %20 None
98               OpSwitch %18 %20 -1 %19
99         %19 = OpLabel
100         %21 = OpAccessChain %15 %10 %12 %14
101         %22 = OpLoad %6 %21
102         %24 = OpAccessChain %15 %10 %12 %23
103         %25 = OpLoad %6 %24
104         %27 = OpFOrdGreaterThan %26 %22 %25
105               OpSelectionMerge %29 None
106               OpBranchConditional %27 %28 %29
107         %28 = OpLabel
108               OpKill
109         %29 = OpLabel
110               OpBranch %20
111         %20 = OpLabel
112               OpStore %34 %37
113               OpReturn
114               OpFunctionEnd
115END
116
117# uniforms for variant
118
119# injectionSwitch
120BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
121 0.0 1.0
122END
123
124BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
125
126PIPELINE graphics variant_pipeline
127  ATTACH variant_vertex_shader
128  ATTACH variant_fragment_shader
129  FRAMEBUFFER_SIZE 256 256
130  BIND BUFFER variant_framebuffer AS color LOCATION 0
131  BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 0
132END
133CLEAR_COLOR variant_pipeline 0 0 0 255
134
135CLEAR variant_pipeline
136RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
137
138EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
139