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2026-05-06 23:44:13 +02:00
parent a5f787d80f
commit fd7038b853
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+#!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 target lowering 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;
+# layout(set = 0, binding = 0) uniform buf0
+# {
+#     float two;
+# };
+#
+# void main()
+# {
+#     float a = dFdx(cos(gl_FragCoord.x));
+#
+#     // The weight value doesn't matter since two equals 2.
+#     float b = mix(2.0, two, a);
+#
+#     // Always true.
+#     if (b >= 1.9 && b <= 2.1)
+#         _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: 48
+; Schema: 0
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main" %11 %42
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %4 "main"
+               OpName %8 "a"
+               OpName %11 "gl_FragCoord"
+               OpName %19 "b"
+               OpName %21 "buf0"
+               OpMemberName %21 0 "two"
+               OpName %23 ""
+               OpName %42 "_GLF_color"
+               OpDecorate %11 BuiltIn FragCoord
+               OpMemberDecorate %21 0 Offset 0
+               OpDecorate %21 Block
+               OpDecorate %23 DescriptorSet 0
+               OpDecorate %23 Binding 0
+               OpDecorate %42 Location 0
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %6 = OpTypeFloat 32
+          %7 = OpTypePointer Function %6
+          %9 = OpTypeVector %6 4
+         %10 = OpTypePointer Input %9
+         %11 = OpVariable %10 Input
+         %12 = OpTypeInt 32 0
+         %13 = OpConstant %12 0
+         %14 = OpTypePointer Input %6
+         %20 = OpConstant %6 2
+         %21 = OpTypeStruct %6
+         %22 = OpTypePointer Uniform %21
+         %23 = OpVariable %22 Uniform
+         %24 = OpTypeInt 32 1
+         %25 = OpConstant %24 0
+         %26 = OpTypePointer Uniform %6
+         %32 = OpConstant %6 1.89999998
+         %33 = OpTypeBool
+         %36 = OpConstant %6 2.0999999
+         %41 = OpTypePointer Output %9
+         %42 = OpVariable %41 Output
+         %43 = OpConstant %6 1
+         %44 = OpConstant %6 0
+         %45 = OpConstantComposite %9 %43 %44 %44 %43
+         %47 = OpConstantComposite %9 %44 %44 %44 %44
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+          %8 = OpVariable %7 Function
+         %19 = OpVariable %7 Function
+         %15 = OpAccessChain %14 %11 %13
+         %16 = OpLoad %6 %15
+         %17 = OpExtInst %6 %1 Cos %16
+         %18 = OpDPdx %6 %17
+               OpStore %8 %18
+         %27 = OpAccessChain %26 %23 %25
+         %28 = OpLoad %6 %27
+         %29 = OpLoad %6 %8
+         %30 = OpExtInst %6 %1 FMix %20 %28 %29
+               OpStore %19 %30
+         %31 = OpLoad %6 %19
+         %34 = OpFOrdGreaterThanEqual %33 %31 %32
+         %35 = OpLoad %6 %19
+         %37 = OpFOrdLessThanEqual %33 %35 %36
+         %38 = OpLogicalAnd %33 %34 %37
+               OpSelectionMerge %40 None
+               OpBranchConditional %38 %39 %46
+         %39 = OpLabel
+               OpStore %42 %45
+               OpBranch %40
+         %46 = OpLabel
+               OpStore %42 %47
+               OpBranch %40
+         %40 = OpLabel
+               OpReturn
+               OpFunctionEnd
+END
+
+# uniforms for variant
+
+# two
+BUFFER variant_two DATA_TYPE float DATA
+ 2.0
+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_two 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