#!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 bug found by GraphicsFuzz.

# Short description: A fragment shader with a switch, if, and discard

# The test passes because the shader always writes the color red;
# the switch is always skipped.

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()
# {
#   switch (int(injectionSwitch.y)) // always 1
#   {
#   case -1:
#     if (injectionSwitch.y > injectionSwitch.x)
#     {
#       discard;
#     }
#   }
#   _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 7
; Bound: 38
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %34
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "buf0"
               OpMemberName %8 0 "injectionSwitch"
               OpName %10 ""
               OpName %34 "_GLF_color"
               OpMemberDecorate %8 0 Offset 0
               OpDecorate %8 Block
               OpDecorate %10 DescriptorSet 0
               OpDecorate %10 Binding 0
               OpDecorate %34 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 = OpTypeInt 32 0
         %14 = OpConstant %13 1
         %15 = OpTypePointer Uniform %6
         %23 = OpConstant %13 0
         %26 = OpTypeBool
         %32 = OpTypeVector %6 4
         %33 = OpTypePointer Output %32
         %34 = OpVariable %33 Output
         %35 = OpConstant %6 1
         %36 = OpConstant %6 0
         %37 = OpConstantComposite %32 %35 %36 %36 %35
          %4 = OpFunction %2 None %3
          %5 = OpLabel
         %16 = OpAccessChain %15 %10 %12 %14
         %17 = OpLoad %6 %16
         %18 = OpConvertFToS %11 %17
               OpSelectionMerge %20 None
               OpSwitch %18 %20 -1 %19
         %19 = OpLabel
         %21 = OpAccessChain %15 %10 %12 %14
         %22 = OpLoad %6 %21
         %24 = OpAccessChain %15 %10 %12 %23
         %25 = OpLoad %6 %24
         %27 = OpFOrdGreaterThan %26 %22 %25
               OpSelectionMerge %29 None
               OpBranchConditional %27 %28 %29
         %28 = OpLabel
               OpKill
         %29 = OpLabel
               OpBranch %20
         %20 = OpLabel
               OpStore %34 %37
               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