#!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 vector log2 and cosh 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()
# {
#     vec2 v = log2(cosh(vec2(1, 100)));
#
#     if (v.x < v.y)
#         _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: 34
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %29
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %9 "v"
               OpName %29 "_GLF_color"
               OpDecorate %29 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeFloat 32
          %7 = OpTypeVector %6 2
          %8 = OpTypePointer Function %7
         %10 = OpConstant %6 1
         %11 = OpConstant %6 100
         %12 = OpConstantComposite %7 %10 %11
         %15 = OpTypeInt 32 0
         %16 = OpConstant %15 0
         %17 = OpTypePointer Function %6
         %20 = OpConstant %15 1
         %23 = OpTypeBool
         %27 = OpTypeVector %6 4
         %28 = OpTypePointer Output %27
         %29 = OpVariable %28 Output
         %30 = OpConstant %6 0
         %31 = OpConstantComposite %27 %10 %30 %30 %10
         %33 = OpConstantComposite %27 %30 %30 %30 %30
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %9 = OpVariable %8 Function
         %13 = OpExtInst %7 %1 Cosh %12
         %14 = OpExtInst %7 %1 Log2 %13
               OpStore %9 %14
         %18 = OpAccessChain %17 %9 %16
         %19 = OpLoad %6 %18
         %21 = OpAccessChain %17 %9 %20
         %22 = OpLoad %6 %21
         %24 = OpFOrdLessThan %23 %19 %22
               OpSelectionMerge %26 None
               OpBranchConditional %24 %25 %32
         %25 = OpLabel
               OpStore %29 %31
               OpBranch %26
         %32 = OpLabel
               OpStore %29 %33
               OpBranch %26
         %26 = 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