#!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 instruction folding 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;
#
# layout(set = 0, binding = 0) uniform buf0
# {
#     vec2 injectionSwitch;
# };
# layout(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     // Always true.
#     if(mix(injectionSwitch, vec2(1), vec2(0)) == vec2(0, 1))
#         _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: 34
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %30
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "buf0"
               OpMemberName %8 0 "injectionSwitch"
               OpName %10 ""
               OpName %30 "_GLF_color"
               OpMemberDecorate %8 0 Offset 0
               OpDecorate %8 Block
               OpDecorate %10 DescriptorSet 0
               OpDecorate %10 Binding 0
               OpDecorate %30 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 2
          %8 = OpTypeStruct %7
          %9 = OpTypePointer Uniform %8
         %10 = OpVariable %9 Uniform
         %11 = OpTypeInt 32 1
         %12 = OpConstant %11 0
         %13 = OpTypePointer Uniform %7
         %16 = OpConstant %6 1
         %17 = OpConstantComposite %7 %16 %16
         %18 = OpConstant %6 0
         %19 = OpConstantComposite %7 %18 %18
         %21 = OpConstantComposite %7 %18 %16
         %22 = OpTypeBool
         %23 = OpTypeVector %22 2
         %28 = OpTypeVector %6 4
         %29 = OpTypePointer Output %28
         %30 = OpVariable %29 Output
         %31 = OpConstantComposite %28 %16 %18 %18 %16
         %33 = OpConstantComposite %28 %18 %18 %18 %18
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %14 = OpAccessChain %13 %10 %12
         %15 = OpLoad %7 %14
         %20 = OpExtInst %7 %1 FMix %15 %17 %19
         %24 = OpFOrdEqual %23 %20 %21
         %25 = OpAll %22 %24
               OpSelectionMerge %27 None
               OpBranchConditional %25 %26 %32
         %26 = OpLabel
               OpStore %30 %31
               OpBranch %27
         %32 = OpLabel
               OpStore %30 %33
               OpBranch %27
         %27 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# injectionSwitch
BUFFER variant_injectionSwitch DATA_TYPE vec2<float> DATA
 0.0 1.0
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 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