#!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 constant folding code 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(location = 0) out vec4 _GLF_color;
#
# void main()
# {
#     float f = atan(1.0, tanh(1.0));
#
#     if (f > 0.91 && f < 0.93)
#         _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: 29
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %24
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "f"
               OpName %24 "_GLF_color"
               OpDecorate %24 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 1
         %13 = OpConstant %6 0.910000026
         %14 = OpTypeBool
         %17 = OpConstant %6 0.930000007
         %22 = OpTypeVector %6 4
         %23 = OpTypePointer Output %22
         %24 = OpVariable %23 Output
         %25 = OpConstant %6 0
         %26 = OpConstantComposite %22 %9 %25 %25 %9
         %28 = OpConstantComposite %22 %25 %25 %25 %25
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %10 = OpExtInst %6 %1 Tanh %9
         %11 = OpExtInst %6 %1 Atan2 %9 %10
               OpStore %8 %11
         %12 = OpLoad %6 %8
         %15 = OpFOrdGreaterThan %14 %12 %13
         %16 = OpLoad %6 %8
         %18 = OpFOrdLessThan %14 %16 %17
         %19 = OpLogicalAnd %14 %15 %18
               OpSelectionMerge %21 None
               OpBranchConditional %19 %20 %27
         %20 = OpLabel
               OpStore %24 %26
               OpBranch %21
         %27 = OpLabel
               OpStore %24 %28
               OpBranch %21
         %21 = OpLabel
               OpReturn
               OpFunctionEnd
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
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