3 # Copyright 2020 Google LLC
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
9 # http://www.apache.org/licenses/LICENSE-2.0
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.
18 # A test for a coverage-gap found by GraphicsFuzz.
20 # Short description: A fragment shader that covers a specific vector log2 and cosh code path.
22 # The test passes because shader always writes red.
24 SHADER vertex variant_vertex_shader PASSTHROUGH
26 # variant_fragment_shader is derived from the following GLSL:
28 # precision highp float;
30 # layout(location = 0) out vec4 _GLF_color;
34 # vec2 v = log2(cosh(vec2(1, 100)));
37 # _GLF_color = vec4(1, 0, 0, 1);
39 # _GLF_color = vec4(0);
41 SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
44 ; Generator: Khronos Glslang Reference Front End; 8
48 %1 = OpExtInstImport "GLSL.std.450"
49 OpMemoryModel Logical GLSL450
50 OpEntryPoint Fragment %4 "main" %29
51 OpExecutionMode %4 OriginUpperLeft
55 OpName %29 "_GLF_color"
56 OpDecorate %29 Location 0
58 %3 = OpTypeFunction %2
60 %7 = OpTypeVector %6 2
61 %8 = OpTypePointer Function %7
63 %11 = OpConstant %6 100
64 %12 = OpConstantComposite %7 %10 %11
66 %16 = OpConstant %15 0
67 %17 = OpTypePointer Function %6
68 %20 = OpConstant %15 1
70 %27 = OpTypeVector %6 4
71 %28 = OpTypePointer Output %27
72 %29 = OpVariable %28 Output
74 %31 = OpConstantComposite %27 %10 %30 %30 %10
75 %33 = OpConstantComposite %27 %30 %30 %30 %30
76 %4 = OpFunction %2 None %3
78 %9 = OpVariable %8 Function
79 %13 = OpExtInst %7 %1 Cosh %12
80 %14 = OpExtInst %7 %1 Log2 %13
82 %18 = OpAccessChain %17 %9 %16
84 %21 = OpAccessChain %17 %9 %20
86 %24 = OpFOrdLessThan %23 %19 %22
87 OpSelectionMerge %26 None
88 OpBranchConditional %24 %25 %32
101 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
103 PIPELINE graphics variant_pipeline
104 ATTACH variant_vertex_shader
105 ATTACH variant_fragment_shader
106 FRAMEBUFFER_SIZE 256 256
107 BIND BUFFER variant_framebuffer AS color LOCATION 0
109 CLEAR_COLOR variant_pipeline 0 0 0 255
111 CLEAR variant_pipeline
112 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
114 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255