#!amber

# Copyright 2021 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.


# A test for a coverage-gap found by the GraphicsFuzz project.

# Short description: A fragment shader that covers specific BRW code paths

# The test passes because the shader always writes red.

SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 320 es
# #define _int_100 _GLF_uniform_int_values[0]
# #define _int_0 _GLF_uniform_int_values[1]
# #define _float_10_0 _GLF_uniform_float_values[0]
#
# precision highp int;
# precision highp float;
#
# // Contents of _GLF_uniform_float_values: 10.0
# layout(set = 0, binding = 0) uniform buf0
# {
#     float _GLF_uniform_float_values[1];
# };
# // Contents of _GLF_uniform_int_values: [100, 0]
# layout(set = 0, binding = 1) uniform buf1
# {
#     int _GLF_uniform_int_values[2];
# };
# // Contents of injectionSwitch: [0.0, 1.0]
# layout(set = 0, binding = 2) uniform buf2
# {
#     vec2 injectionSwitch;
# };
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     // To hit the coverage points this value cannot
#     // be changed later.
#     _GLF_color = vec4(1, 0, 0, 1);
#
#     for (int i = _int_0; i < _int_100; i++)
#     {
#         if (i != _int_0)
#         {
#             return;
#         }
#     }
#
#     // Execution never reaches this point.
#     if (gl_FragCoord.y < _float_10_0)
#     {
#         return;
#     }
#     _GLF_color = vec4(vec3(1.0), injectionSwitch.y);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 10
; Bound: 75
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %9 %47
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %9 "_GLF_color"
               OpName %15 "i"
               OpName %19 "buf1"
               OpMemberName %19 0 "_GLF_uniform_int_values"
               OpName %21 ""
               OpName %47 "gl_FragCoord"
               OpName %53 "buf0"
               OpMemberName %53 0 "_GLF_uniform_float_values"
               OpName %55 ""
               OpName %66 "buf2"
               OpMemberName %66 0 "injectionSwitch"
               OpName %68 ""
               OpDecorate %9 Location 0
               OpDecorate %18 ArrayStride 16
               OpMemberDecorate %19 0 Offset 0
               OpDecorate %19 Block
               OpDecorate %21 DescriptorSet 0
               OpDecorate %21 Binding 1
               OpDecorate %47 BuiltIn FragCoord
               OpDecorate %52 ArrayStride 16
               OpMemberDecorate %53 0 Offset 0
               OpDecorate %53 Block
               OpDecorate %55 DescriptorSet 0
               OpDecorate %55 Binding 0
               OpMemberDecorate %66 0 Offset 0
               OpDecorate %66 Block
               OpDecorate %68 DescriptorSet 0
               OpDecorate %68 Binding 2
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 4
          %8 = OpTypePointer Output %7
          %9 = OpVariable %8 Output
         %10 = OpConstant %6 1
         %11 = OpConstant %6 0
         %12 = OpConstantComposite %7 %10 %11 %11 %10
         %13 = OpTypeInt 32 1
         %14 = OpTypePointer Function %13
         %16 = OpTypeInt 32 0
         %17 = OpConstant %16 2
         %18 = OpTypeArray %13 %17
         %19 = OpTypeStruct %18
         %20 = OpTypePointer Uniform %19
         %21 = OpVariable %20 Uniform
         %22 = OpConstant %13 0
         %23 = OpConstant %13 1
         %24 = OpTypePointer Uniform %13
         %35 = OpTypeBool
         %46 = OpTypePointer Input %7
         %47 = OpVariable %46 Input
         %48 = OpConstant %16 1
         %49 = OpTypePointer Input %6
         %52 = OpTypeArray %6 %48
         %53 = OpTypeStruct %52
         %54 = OpTypePointer Uniform %53
         %55 = OpVariable %54 Uniform
         %56 = OpTypePointer Uniform %6
         %63 = OpTypeVector %6 3
         %64 = OpConstantComposite %63 %10 %10 %10
         %65 = OpTypeVector %6 2
         %66 = OpTypeStruct %65
         %67 = OpTypePointer Uniform %66
         %68 = OpVariable %67 Uniform
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %15 = OpVariable %14 Function
               OpStore %9 %12
         %25 = OpAccessChain %24 %21 %22 %23
         %26 = OpLoad %13 %25
               OpStore %15 %26
               OpBranch %27
         %27 = OpLabel
               OpLoopMerge %29 %30 None
               OpBranch %31
         %31 = OpLabel
         %32 = OpLoad %13 %15
         %33 = OpAccessChain %24 %21 %22 %22
         %34 = OpLoad %13 %33
         %36 = OpSLessThan %35 %32 %34
               OpBranchConditional %36 %28 %29
         %28 = OpLabel
         %37 = OpLoad %13 %15
         %38 = OpAccessChain %24 %21 %22 %23
         %39 = OpLoad %13 %38
         %40 = OpINotEqual %35 %37 %39
               OpSelectionMerge %42 None
               OpBranchConditional %40 %41 %42
         %41 = OpLabel
               OpReturn
         %42 = OpLabel
               OpBranch %30
         %30 = OpLabel
         %44 = OpLoad %13 %15
         %45 = OpIAdd %13 %44 %23
               OpStore %15 %45
               OpBranch %27
         %29 = OpLabel
         %50 = OpAccessChain %49 %47 %48
         %51 = OpLoad %6 %50
         %57 = OpAccessChain %56 %55 %22 %22
         %58 = OpLoad %6 %57
         %59 = OpFOrdLessThan %35 %51 %58
               OpSelectionMerge %61 None
               OpBranchConditional %59 %60 %61
         %60 = OpLabel
               OpReturn
         %61 = OpLabel
         %69 = OpAccessChain %56 %68 %22 %48
         %70 = OpLoad %6 %69
         %71 = OpCompositeExtract %6 %64 0
         %72 = OpCompositeExtract %6 %64 1
         %73 = OpCompositeExtract %6 %64 2
         %74 = OpCompositeConstruct %7 %71 %72 %73 %70
               OpStore %9 %74
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# injectionSwitch
BUFFER variant_injectionSwitch DATA_TYPE vec2<float> STD140 DATA
 0.0 1.0
END
# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
 100 0
END
# _GLF_uniform_float_values
BUFFER variant__GLF_uniform_float_values DATA_TYPE float[] STD140 DATA
 10.0
END

BUFFER variant_framebuffer FORMAT B8G8R8A8_UNORM

PIPELINE graphics variant_pipeline
  ATTACH variant_vertex_shader
  ATTACH variant_fragment_shader
  FRAMEBUFFER_SIZE 256 256
  BIND BUFFER variant_framebuffer AS color LOCATION 0
  BIND BUFFER variant_injectionSwitch AS uniform DESCRIPTOR_SET 0 BINDING 2
  BIND BUFFER variant__GLF_uniform_int_values AS uniform DESCRIPTOR_SET 0 BINDING 1
  BIND BUFFER variant__GLF_uniform_float_values AS uniform DESCRIPTOR_SET 0 BINDING 0
END
CLEAR_COLOR variant_pipeline 0 0 0 255

CLEAR variant_pipeline
RUN variant_pipeline DRAW_RECT POS 0 0 SIZE 256 256

EXPECT variant_framebuffer IDX 0 0 SIZE 256 256 EQ_RGBA 255 0 0 255