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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 that calls modf twice, once with color
21
22# The test passes because the shader always writes the color red using modf.
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(location = 0) out vec4 _GLF_color;
31#
32# void main()
33# {
34#     vec4 temp;
35#     modf(vec4(1.0), temp);
36#     modf(vec4(1.0, 0.0, 0.0, 1.0), _GLF_color);
37# }
38SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
39; SPIR-V
40; Version: 1.0
41; Generator: Khronos Glslang Reference Front End; 7
42; Bound: 18
43; Schema: 0
44               OpCapability Shader
45          %1 = OpExtInstImport "GLSL.std.450"
46               OpMemoryModel Logical GLSL450
47               OpEntryPoint Fragment %4 "main" %16
48               OpExecutionMode %4 OriginUpperLeft
49               OpSource ESSL 310
50               OpName %4 "main"
51               OpName %11 "temp"
52               OpName %16 "_GLF_color"
53               OpDecorate %16 Location 0
54          %2 = OpTypeVoid
55          %3 = OpTypeFunction %2
56          %6 = OpTypeFloat 32
57          %7 = OpTypeVector %6 4
58          %8 = OpConstant %6 1
59          %9 = OpConstantComposite %7 %8 %8 %8 %8
60         %10 = OpTypePointer Function %7
61         %13 = OpConstant %6 0
62         %14 = OpConstantComposite %7 %8 %13 %13 %8
63         %15 = OpTypePointer Output %7
64         %16 = OpVariable %15 Output
65          %4 = OpFunction %2 None %3
66          %5 = OpLabel
67         %11 = OpVariable %10 Function
68         %12 = OpExtInst %7 %1 Modf %9 %11
69         %17 = OpExtInst %7 %1 Modf %14 %16
70               OpReturn
71               OpFunctionEnd
72END
73
74# uniforms for variant
75
76
77BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM
78
79PIPELINE 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
84END
85CLEAR_COLOR variant_pipeline 0 0 0 255
86
87CLEAR variant_pipeline
88RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256
89
90EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255
91