3 # Copyright 2019 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 bug found by GraphicsFuzz.
20 # Short description: A fragment shader that calls modf twice, once with color
22 # The test passes because the shader always writes the color red using modf.
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;
35 # modf(vec4(1.0), temp);
36 # modf(vec4(1.0, 0.0, 0.0, 1.0), _GLF_color);
38 SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
41 ; Generator: Khronos Glslang Reference Front End; 7
45 %1 = OpExtInstImport "GLSL.std.450"
46 OpMemoryModel Logical GLSL450
47 OpEntryPoint Fragment %4 "main" %16
48 OpExecutionMode %4 OriginUpperLeft
52 OpName %16 "_GLF_color"
53 OpDecorate %16 Location 0
55 %3 = OpTypeFunction %2
57 %7 = OpTypeVector %6 4
59 %9 = OpConstantComposite %7 %8 %8 %8 %8
60 %10 = OpTypePointer Function %7
62 %14 = OpConstantComposite %7 %8 %13 %13 %8
63 %15 = OpTypePointer Output %7
64 %16 = OpVariable %15 Output
65 %4 = OpFunction %2 None %3
67 %11 = OpVariable %10 Function
68 %12 = OpExtInst %7 %1 Modf %9 %11
69 %17 = OpExtInst %7 %1 Modf %14 %16
74 # uniforms for variant
77 BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
79 PIPELINE graphics variant_pipeline
80 ATTACH variant_vertex_shader
81 ATTACH variant_fragment_shader
82 FRAMEBUFFER_SIZE 256 256
83 BIND BUFFER variant_framebuffer AS color LOCATION 0
85 CLEAR_COLOR variant_pipeline 0 0 0 255
87 CLEAR variant_pipeline
88 RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
90 EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255