#!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 shader validation 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;
# };
#
# void main()
# {
#     int a = 0;
#
#     switch(one)
#     {
#         case 2:
#         case 3:
#             a = 1;
#         case 4:
#             break;
#         default:
#             a = 2;
#             break;
#     }
#
#     if (a == 2)
#         _GLF_color = vec4(1, 0, 0, 1);
#     else
#         _GLF_color = vec4(0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 39
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %33
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "a"
               OpName %10 "buf0"
               OpMemberName %10 0 "one"
               OpName %12 ""
               OpName %33 "_GLF_color"
               OpMemberDecorate %10 0 Offset 0
               OpDecorate %10 Block
               OpDecorate %12 DescriptorSet 0
               OpDecorate %12 Binding 0
               OpDecorate %33 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 0
         %10 = OpTypeStruct %6
         %11 = OpTypePointer Uniform %10
         %12 = OpVariable %11 Uniform
         %13 = OpTypePointer Uniform %6
         %20 = OpConstant %6 1
         %22 = OpConstant %6 2
         %26 = OpTypeBool
         %30 = OpTypeFloat 32
         %31 = OpTypeVector %30 4
         %32 = OpTypePointer Output %31
         %33 = OpVariable %32 Output
         %34 = OpConstant %30 1
         %35 = OpConstant %30 0
         %36 = OpConstantComposite %31 %34 %35 %35 %34
         %38 = OpConstantComposite %31 %35 %35 %35 %35
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
               OpStore %8 %9
         %14 = OpAccessChain %13 %12 %9
         %15 = OpLoad %6 %14
               OpSelectionMerge %19 None
               OpSwitch %15 %18 2 %16 3 %16 4 %17
         %18 = OpLabel
               OpStore %8 %22
               OpBranch %19
         %16 = OpLabel
               OpStore %8 %20
               OpBranch %17
         %17 = OpLabel
               OpBranch %19
         %19 = OpLabel
         %25 = OpLoad %6 %8
         %27 = OpIEqual %26 %25 %22
               OpSelectionMerge %29 None
               OpBranchConditional %27 %28 %37
         %28 = OpLabel
               OpStore %33 %36
               OpBranch %29
         %37 = OpLabel
               OpStore %33 %38
               OpBranch %29
         %29 = OpLabel
               OpReturn
               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