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 bug found by GraphicsFuzz.
19
20# Short description: Nested switches with break and discard
21
22# The test passes because the 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#
35# layout(location = 0) out vec4 _GLF_color;
36#
37# void main()
38# {
39#   _GLF_color = vec4(0.0, 0.0, 0.0, 1.0);
40#
41#   switch (int(injectionSwitch.x)) // 0
42#   {
43#   case 0:
44#     switch (1)
45#     {
46#     case 1:
47#       if (gl_FragCoord.y >= 0.0) // Always true.
48#       {
49#         _GLF_color = vec4(1.0, 0.0, 0.0, 1.0); // Red.
50#         break;
51#       }
52#       discard;
53#     }
54#   case 42:
55#     break;
56#   }
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: 47
63; Schema: 0
64               OpCapability Shader
65          %1 = OpExtInstImport "GLSL.std.450"
66               OpMemoryModel Logical GLSL450
67               OpEntryPoint Fragment %4 "main" %9 %32
68               OpExecutionMode %4 OriginUpperLeft
69               OpSource ESSL 310
70               OpName %4 "main"
71               OpName %9 "_GLF_color"
72               OpName %14 "buf0"
73               OpMemberName %14 0 "injectionSwitch"
74               OpName %16 ""
75               OpName %32 "gl_FragCoord"
76               OpDecorate %9 Location 0
77               OpMemberDecorate %14 0 Offset 0
78               OpDecorate %14 Block
79               OpDecorate %16 DescriptorSet 0
80               OpDecorate %16 Binding 0
81               OpDecorate %32 BuiltIn FragCoord
82          %2 = OpTypeVoid
83          %3 = OpTypeFunction %2
84          %6 = OpTypeFloat 32
85          %7 = OpTypeVector %6 4
86          %8 = OpTypePointer Output %7
87          %9 = OpVariable %8 Output
88         %10 = OpConstant %6 0
89         %11 = OpConstant %6 1
90         %12 = OpConstantComposite %7 %10 %10 %10 %11
91         %13 = OpTypeVector %6 2
92         %14 = OpTypeStruct %13
93         %15 = OpTypePointer Uniform %14
94         %16 = OpVariable %15 Uniform
95         %17 = OpTypeInt 32 1
96         %18 = OpConstant %17 0
97         %19 = OpTypeInt 32 0
98         %20 = OpConstant %19 0
99         %21 = OpTypePointer Uniform %6
100         %28 = OpConstant %17 1
101         %31 = OpTypePointer Input %7
102         %32 = OpVariable %31 Input
103         %33 = OpConstant %19 1
104         %34 = OpTypePointer Input %6
105         %37 = OpTypeBool
106         %41 = OpConstantComposite %7 %11 %10 %10 %11
107          %4 = OpFunction %2 None %3
108          %5 = OpLabel
109               OpStore %9 %12
110         %22 = OpAccessChain %21 %16 %18 %20
111         %23 = OpLoad %6 %22
112         %24 = OpConvertFToS %17 %23
113               OpSelectionMerge %27 None
114               OpSwitch %24 %27 0 %25 42 %26
115         %25 = OpLabel
116               OpSelectionMerge %30 None
117               OpSwitch %28 %30 1 %29
118         %29 = OpLabel
119         %35 = OpAccessChain %34 %32 %33
120         %36 = OpLoad %6 %35
121         %38 = OpFOrdGreaterThanEqual %37 %36 %10
122               OpSelectionMerge %40 None
123               OpBranchConditional %38 %39 %40
124         %39 = OpLabel
125               OpStore %9 %41
126               OpBranch %30
127         %40 = OpLabel
128               OpKill
129         %30 = OpLabel
130               OpBranch %26
131         %26 = OpLabel
132               OpBranch %27
133         %27 = OpLabel
134               OpReturn
135               OpFunctionEnd
136END
137
138# uniforms for variant
139
140# injectionSwitch
141BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
142 0.0 1.0
143END
144
145BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
146
147PIPELINE graphics variant_pipeline
148  ATTACH variant_vertex_shader
149  ATTACH variant_fragment_shader
150  FRAMEBUFFER_SIZE 256 256
151  BIND BUFFER variant_framebuffer AS color LOCATION 0
152  BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 0
153END
154CLEAR_COLOR variant_pipeline 0 0 0 255
155
156CLEAR variant_pipeline
157RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
158
159EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
160