#!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 machine value type 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;
# precision highp int;
#
# layout(location = 0) out vec4 _GLF_color;
#
# layout(set = 0, binding = 0) uniform buf0
# {
#     vec2 injectionSwitch;
# };
#
# void main()
# {
#     int a = 0;
#     for(int i = 0; i < int(injectionSwitch.y); i++)
#     {
#         if (a > 0)
#         {
#             break;
#         }
#         // a becomes 1.
#         a = ((int(injectionSwitch.y) * 2) / 2);
#     }
#
#     if (a == 1) // Always true.
#         _GLF_color = vec4(1, 0, 0, 1);
#     else
#         _GLF_color = vec4(0);
# }
SHADER fragment variant_fragment_shader SPIRV-ASM TARGET_ENV spv1.0
; SPIR-V
; Version: 1.0
; Generator: Khronos Glslang Reference Front End; 8
; Bound: 56
; Schema: 0
               OpCapability Shader
          %1 = OpExtInstImport "GLSL.std.450"
               OpMemoryModel Logical GLSL450
               OpEntryPoint Fragment %4 "main" %50
               OpExecutionMode %4 OriginUpperLeft
               OpSource ESSL 310
               OpName %4 "main"
               OpName %8 "a"
               OpName %10 "i"
               OpName %19 "buf0"
               OpMemberName %19 0 "injectionSwitch"
               OpName %21 ""
               OpName %50 "_GLF_color"
               OpMemberDecorate %19 0 Offset 0
               OpDecorate %19 Block
               OpDecorate %21 DescriptorSet 0
               OpDecorate %21 Binding 0
               OpDecorate %50 Location 0
          %2 = OpTypeVoid
          %3 = OpTypeFunction %2
          %6 = OpTypeInt 32 1
          %7 = OpTypePointer Function %6
          %9 = OpConstant %6 0
         %17 = OpTypeFloat 32
         %18 = OpTypeVector %17 2
         %19 = OpTypeStruct %18
         %20 = OpTypePointer Uniform %19
         %21 = OpVariable %20 Uniform
         %22 = OpTypeInt 32 0
         %23 = OpConstant %22 1
         %24 = OpTypePointer Uniform %17
         %28 = OpTypeBool
         %38 = OpConstant %6 2
         %42 = OpConstant %6 1
         %48 = OpTypeVector %17 4
         %49 = OpTypePointer Output %48
         %50 = OpVariable %49 Output
         %51 = OpConstant %17 1
         %52 = OpConstant %17 0
         %53 = OpConstantComposite %48 %51 %52 %52 %51
         %55 = OpConstantComposite %48 %52 %52 %52 %52
          %4 = OpFunction %2 None %3
          %5 = OpLabel
          %8 = OpVariable %7 Function
         %10 = OpVariable %7 Function
               OpStore %8 %9
               OpStore %10 %9
               OpBranch %11
         %11 = OpLabel
               OpLoopMerge %13 %14 None
               OpBranch %15
         %15 = OpLabel
         %16 = OpLoad %6 %10
         %25 = OpAccessChain %24 %21 %9 %23
         %26 = OpLoad %17 %25
         %27 = OpConvertFToS %6 %26
         %29 = OpSLessThan %28 %16 %27
               OpBranchConditional %29 %12 %13
         %12 = OpLabel
         %30 = OpLoad %6 %8
         %31 = OpSGreaterThan %28 %30 %9
               OpSelectionMerge %33 None
               OpBranchConditional %31 %32 %33
         %32 = OpLabel
               OpBranch %13
         %33 = OpLabel
         %35 = OpAccessChain %24 %21 %9 %23
         %36 = OpLoad %17 %35
         %37 = OpConvertFToS %6 %36
         %39 = OpIMul %6 %37 %38
         %40 = OpSDiv %6 %39 %38
               OpStore %8 %40
               OpBranch %14
         %14 = OpLabel
         %41 = OpLoad %6 %10
         %43 = OpIAdd %6 %41 %42
               OpStore %10 %43
               OpBranch %11
         %13 = OpLabel
         %44 = OpLoad %6 %8
         %45 = OpIEqual %28 %44 %42
               OpSelectionMerge %47 None
               OpBranchConditional %45 %46 %54
         %46 = OpLabel
               OpStore %50 %53
               OpBranch %47
         %54 = OpLabel
               OpStore %50 %55
               OpBranch %47
         %47 = 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 256 256 EQ_RGBA 255 0 0 255