#!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_0 _GLF_uniform_int_values[0]
#
# precision highp int;
# precision highp float;
#
# // Contents of _GLF_uniform_int_values: 0
# layout(set = 0, binding = 0) uniform buf0
# {
#     int _GLF_uniform_int_values[1];
# };
#
# // Contents of one: 1
# layout(set = 0, binding = 1) uniform buf1
# {
#     uint one;
# };
#
# layout(location = 0) out vec4 _GLF_color;
#
# // Function is missing return value at the end,
# // but this function is never called.
# float func()
# {
#     switch(1)
#     {
#         case 0:
#             return 1.0;
#     }
# }
#
# void main()
# {
#     vec4 v = vec4(1.0);
#
#     // Always false.
#     if (gl_FragCoord.y < 0.0)
#     {
#         v = vec4(func());
#     }
#
#     // Always false.
#     if (packUnorm4x8(v) == 1u)
#     {
#         return;
#     }
#
#     // Always true.
#     if ((1u << one) == 2u)
#     {
#         _GLF_color = vec4(1, 0, 0, 1);
#     }
#     else
#     {
#         _GLF_color = vec4(_int_0);
#     }
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 10
; Bound: 67
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %23 %55
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 320
               OpName %4 "main"
               OpName %8 "func("
               OpName %20 "v"
               OpName %23 "gl_FragCoord"
               OpName %42 "buf1"
               OpMemberName %42 0 "one"
               OpName %44 ""
               OpName %55 "_GLF_color"
               OpName %59 "buf0"
               OpMemberName %59 0 "_GLF_uniform_int_values"
               OpName %61 ""
               OpDecorate %23 BuiltIn FragCoord
               OpMemberDecorate %42 0 Offset 0
               OpDecorate %42 Block
               OpDecorate %44 DescriptorSet 0
               OpDecorate %44 Binding 1
               OpDecorate %55 Location 0
               OpDecorate %58 ArrayStride 16
               OpMemberDecorate %59 0 Offset 0
               OpDecorate %59 Block
               OpDecorate %61 DescriptorSet 0
               OpDecorate %61 Binding 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeFunction %6
         %10 = OpTypeInt 32 1
         %11 = OpConstant %10 1
         %14 = OpConstant %6 1
         %18 = OpTypeVector %6 4
         %19 = OpTypePointer Function %18
         %21 = OpConstantComposite %18 %14 %14 %14 %14
         %22 = OpTypePointer Input %18
         %23 = OpVariable %22 Input
         %24 = OpTypeInt 32 0
         %25 = OpConstant %24 1
         %26 = OpTypePointer Input %6
         %29 = OpConstant %6 0
         %30 = OpTypeBool
         %42 = OpTypeStruct %24
         %43 = OpTypePointer Uniform %42
         %44 = OpVariable %43 Uniform
         %45 = OpConstant %10 0
         %46 = OpTypePointer Uniform %24
         %50 = OpConstant %24 2
         %54 = OpTypePointer Output %18
         %55 = OpVariable %54 Output
         %56 = OpConstantComposite %18 %14 %29 %29 %14
         %58 = OpTypeArray %10 %25
         %59 = OpTypeStruct %58
         %60 = OpTypePointer Uniform %59
         %61 = OpVariable %60 Uniform
         %62 = OpTypePointer Uniform %10
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %20 = OpVariable %19 Function
               OpStore %20 %21
         %27 = OpAccessChain %26 %23 %25
         %28 = OpLoad %6 %27
         %31 = OpFOrdLessThan %30 %28 %29
               OpSelectionMerge %33 None
               OpBranchConditional %31 %32 %33
         %32 = OpLabel
         %34 = OpFunctionCall %6 %8
         %35 = OpCompositeConstruct %18 %34 %34 %34 %34
               OpStore %20 %35
               OpBranch %33
         %33 = OpLabel
         %36 = OpLoad %18 %20
         %37 = OpExtInst %24 %1 PackUnorm4x8 %36
         %38 = OpIEqual %30 %37 %25
               OpSelectionMerge %40 None
               OpBranchConditional %38 %39 %40
         %39 = OpLabel
               OpReturn
         %40 = OpLabel
         %47 = OpAccessChain %46 %44 %45
         %48 = OpLoad %24 %47
         %49 = OpShiftLeftLogical %24 %25 %48
         %51 = OpIEqual %30 %49 %50
               OpSelectionMerge %53 None
               OpBranchConditional %51 %52 %57
         %52 = OpLabel
               OpStore %55 %56
               OpBranch %53
         %57 = OpLabel
         %63 = OpAccessChain %62 %61 %45 %45
         %64 = OpLoad %10 %63
         %65 = OpConvertSToF %6 %64
         %66 = OpCompositeConstruct %18 %65 %65 %65 %65
               OpStore %55 %66
               OpBranch %53
         %53 = OpLabel
               OpReturn
               OpFunctionEnd
          %8 = OpFunction %6 None %7
          %9 = OpLabel
               OpSelectionMerge %13 None
               OpSwitch %11 %13 0 %12
         %12 = OpLabel
               OpReturnValue %14
         %13 = OpLabel
         %17 = OpUndef %6
               OpReturnValue %17
               OpFunctionEnd
END

# uniforms for variant

# one
BUFFER variant_one DATA_TYPE uint32 STD140 DATA
 1
END
# _GLF_uniform_int_values
BUFFER variant__GLF_uniform_int_values DATA_TYPE int32[] STD140 DATA
 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_one AS uniform DESCRIPTOR_SET 0 BINDING 1
  BIND BUFFER variant__GLF_uniform_int_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