#!amber

# Copyright 2018 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.

# A fragment shader that uses vector swizzles, struct initializers, and min.
# Derived from the following GLSL fragment shader.
# We check that the top-left pixel is red. The test passes because the
# first if statement checks if the x coordinate is less than 10 and if so writes
# red to _GLF_color and then returns.

# #version 310 es
#
# precision highp float;
# precision highp int;
#
# struct S {
#  vec2 s2;
# };
#
# layout(location=0) out vec4 _GLF_color;
#
# layout(set = 0, binding = 0) uniform buf0 {
#   vec2 injectionSwitch;
# };
#
# void main()
# {
#  if (gl_FragCoord.x < 10.0) {
#   _GLF_color = vec4(1.0, 0.0, 0.0, 1.0);
#   return;
#  }
#  vec4 v4 = vec4(injectionSwitch.y);
#  vec2 p = S(v4.xy).s2;
#  v4.xy = p;
#  v4.xy = (min(vec4(1.0), v4)).xy;
#  _GLF_color = vec4(v4.x, 0.0, 0.0, 1.0);
# }

SHADER vertex variant_vertex_shader PASSTHROUGH

SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos SPIR-V Tools Assembler; 0
; Bound: 45
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %2 "main" %3 %4
               OpExecutionMode %2 OriginUpperLeft
               OpSource ESSL 310
               OpName %2 "main"
               OpName %3 "gl_FragCoord"
               OpName %4 "_GLF_color"
               OpName %5 "buf0"
               OpMemberName %5 0 "injectionSwitch"
               OpName %6 ""
               OpDecorate %3 BuiltIn FragCoord
               OpDecorate %4 Location 0
               OpMemberDecorate %5 0 Offset 0
               OpDecorate %5 Block
               OpDecorate %6 DescriptorSet 0
               OpDecorate %6 Binding 0
          %7 = OpTypeVoid
          %8 = OpTypeFunction %7
          %9 = OpTypeFloat 32
         %10 = OpTypeVector %9 4
         %11 = OpTypePointer Input %10
          %3 = OpVariable %11 Input
         %12 = OpTypeInt 32 0
         %13 = OpConstant %12 0
         %14 = OpTypePointer Input %9
         %15 = OpConstant %9 10
         %16 = OpTypeBool
         %17 = OpTypePointer Output %10
          %4 = OpVariable %17 Output
         %18 = OpConstant %9 1
         %19 = OpConstant %9 0
         %20 = OpConstantComposite %10 %18 %19 %19 %18
         %21 = OpTypeVector %9 2
          %5 = OpTypeStruct %21
         %22 = OpTypePointer Uniform %5
          %6 = OpVariable %22 Uniform
         %23 = OpTypeInt 32 1
         %24 = OpConstant %23 0
         %25 = OpConstant %12 1
         %26 = OpTypePointer Uniform %9
         %27 = OpConstantComposite %10 %18 %18 %18 %18
          %2 = OpFunction %7 None %8
         %28 = OpLabel
               OpBranch %29
         %29 = OpLabel
               OpLoopMerge %30 %31 None
               OpBranch %32
         %32 = OpLabel
         %33 = OpAccessChain %14 %3 %13
         %34 = OpLoad %9 %33
         %35 = OpFOrdLessThan %16 %34 %15
               OpSelectionMerge %36 None
               OpBranchConditional %35 %37 %36
         %37 = OpLabel
               OpStore %4 %20
               OpBranch %30
         %36 = OpLabel
         %38 = OpAccessChain %26 %6 %24 %25
         %39 = OpLoad %9 %38
         %40 = OpCompositeConstruct %10 %39 %39 %39 %39
         %41 = OpVectorShuffle %10 %40 %40 4 5 2 3
         %42 = OpExtInst %10 %1 FMin %27 %41
         %43 = OpCompositeExtract %9 %42 0
         %44 = OpCompositeConstruct %10 %43 %19 %19 %18
               OpStore %4 %44
               OpBranch %30
         %31 = OpLabel
               OpBranch %29
         %30 = 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 1 1 EQ_RGBA 255 0 0 255