#!amber

# Copyright 2020 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 GraphicsFuzz.

# Short description: A fragment shader that covers a specific pattern matching path.

# The test passes because shader always writes red.

SHADER vertex variant_vertex_shader PASSTHROUGH

# variant_fragment_shader is derived from the following GLSL:
# #version 310 es
# precision highp float;
# precision highp int;
#
# layout(location = 0) out vec4 _GLF_color;
#
# layout(set = 0, binding = 0) uniform buf0
# {
#     int one;
# };
#
# int func(int x)
# {
#     // Always true.
#     if (one == 1)
#         return x;
#
#     return one;
# }
#
# void main()
# {
#     if(func(-1) <= 0)
#         _GLF_color = vec4(1, 0, 0, 1);
#     else
#         _GLF_color = vec4(0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 45
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %39
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %10 "func(i1;"
               OpName %9 "x"
               OpName %12 "buf0"
               OpMemberName %12 0 "one"
               OpName %14 ""
               OpName %31 "param"
               OpName %39 "_GLF_color"
               OpMemberDecorate %12 0 Offset 0
               OpDecorate %12 Block
               OpDecorate %14 DescriptorSet 0
               OpDecorate %14 Binding 0
               OpDecorate %39 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %8 = OpTypeFunction %6 %7
         %12 = OpTypeStruct %6
         %13 = OpTypePointer Uniform %12
         %14 = OpVariable %13 Uniform
         %15 = OpConstant %6 0
         %16 = OpTypePointer Uniform %6
         %19 = OpConstant %6 1
         %20 = OpTypeBool
         %30 = OpConstant %6 -1
         %36 = OpTypeFloat 32
         %37 = OpTypeVector %36 4
         %38 = OpTypePointer Output %37
         %39 = OpVariable %38 Output
         %40 = OpConstant %36 1
         %41 = OpConstant %36 0
         %42 = OpConstantComposite %37 %40 %41 %41 %40
         %44 = OpConstantComposite %37 %41 %41 %41 %41
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %31 = OpVariable %7 Function
               OpStore %31 %30
         %32 = OpFunctionCall %6 %10 %31
         %33 = OpSLessThanEqual %20 %32 %15
               OpSelectionMerge %35 None
               OpBranchConditional %33 %34 %43
         %34 = OpLabel
               OpStore %39 %42
               OpBranch %35
         %43 = OpLabel
               OpStore %39 %44
               OpBranch %35
         %35 = OpLabel
               OpReturn
               OpFunctionEnd
         %10 = OpFunction %6 None %8
          %9 = OpFunctionParameter %7
         %11 = OpLabel
         %17 = OpAccessChain %16 %14 %15
         %18 = OpLoad %6 %17
         %21 = OpIEqual %20 %18 %19
               OpSelectionMerge %23 None
               OpBranchConditional %21 %22 %23
         %22 = OpLabel
         %24 = OpLoad %6 %9
               OpReturnValue %24
         %23 = OpLabel
         %26 = OpAccessChain %16 %14 %15
         %27 = OpLoad %6 %26
               OpReturnValue %27
               OpFunctionEnd
END

# uniforms for variant

# one
BUFFER variant_one DATA_TYPE int32 DATA
 1
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 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