#!amber

# Copyright 2019 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 const folding rule 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
# {
#     float zero;
# };
#
# void main()
# {
#     if (vec4(clamp(2.0, zero, 1.0), clamp(-1.0, 0.0, zero), 0, 1) != vec4(1, 0, 0, 1))
#         _GLF_color = vec4(0);
#     else
#         _GLF_color = vec4(1, 0, 0, 1);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 36
; 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 "buf0"
               OpMemberName %8 0 "zero"
               OpName %10 ""
               OpName %33 "_GLF_color"
               OpMemberDecorate %8 0 Offset 0
               OpDecorate %8 Block
               OpDecorate %10 DescriptorSet 0
               OpDecorate %10 Binding 0
               OpDecorate %33 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpConstant %6 2
          %8 = OpTypeStruct %6
          %9 = OpTypePointer Uniform %8
         %10 = OpVariable %9 Uniform
         %11 = OpTypeInt 32 1
         %12 = OpConstant %11 0
         %13 = OpTypePointer Uniform %6
         %16 = OpConstant %6 1
         %18 = OpConstant %6 -1
         %19 = OpConstant %6 0
         %23 = OpTypeVector %6 4
         %25 = OpConstantComposite %23 %16 %19 %19 %16
         %26 = OpTypeBool
         %27 = OpTypeVector %26 4
         %32 = OpTypePointer Output %23
         %33 = OpVariable %32 Output
         %34 = OpConstantComposite %23 %19 %19 %19 %19
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %14 = OpAccessChain %13 %10 %12
         %15 = OpLoad %6 %14
         %17 = OpExtInst %6 %1 FClamp %7 %15 %16
         %20 = OpAccessChain %13 %10 %12
         %21 = OpLoad %6 %20
         %22 = OpExtInst %6 %1 FClamp %18 %19 %21
         %24 = OpCompositeConstruct %23 %17 %22 %19 %16
         %28 = OpFOrdNotEqual %27 %24 %25
         %29 = OpAny %26 %28
               OpSelectionMerge %31 None
               OpBranchConditional %29 %30 %35
         %30 = OpLabel
               OpStore %33 %34
               OpBranch %31
         %35 = OpLabel
               OpStore %33 %25
               OpBranch %31
         %31 = OpLabel
               OpReturn
               OpFunctionEnd
END

# uniforms for variant

# zero
BUFFER variant_zero DATA_TYPE float DATA
 0.0
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_zero 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