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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 arbitrary precision float usage.
+
+# 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()
+# {
+#     vec4 v = vec4(1, 2, 3, 4);
+#     float dist1 = distance(tanh(v), sinh(v) / cosh(v));
+#     float dist2 = distance(tanh(v), vec4(0.76159, 0.96403, 0.99505, 0.99933));
+#
+#     // tanh(v) == sinh(v) / cosh(v). Allow some room for precision errors.
+#     if (dist1 < 0.1 && dist2 < 0.1)
+#         _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: 49
+; Schema: 0
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %4 "main" %44
+               OpExecutionMode %4 OriginUpperLeft
+               OpSource ESSL 310
+               OpName %4 "main"
+               OpName %9 "v"
+               OpName %16 "dist1"
+               OpName %25 "dist2"
+               OpName %44 "_GLF_color"
+               OpDecorate %44 Location 0
+          %2 = OpTypeVoid
+          %3 = OpTypeFunction %2
+          %6 = OpTypeFloat 32
+          %7 = OpTypeVector %6 4
+          %8 = OpTypePointer Function %7
+         %10 = OpConstant %6 1
+         %11 = OpConstant %6 2
+         %12 = OpConstant %6 3
+         %13 = OpConstant %6 4
+         %14 = OpConstantComposite %7 %10 %11 %12 %13
+         %15 = OpTypePointer Function %6
+         %28 = OpConstant %6 0.761590004
+         %29 = OpConstant %6 0.964030027
+         %30 = OpConstant %6 0.995050013
+         %31 = OpConstant %6 0.999329984
+         %32 = OpConstantComposite %7 %28 %29 %30 %31
+         %35 = OpConstant %6 0.100000001
+         %36 = OpTypeBool
+         %43 = OpTypePointer Output %7
+         %44 = OpVariable %43 Output
+         %45 = OpConstant %6 0
+         %46 = OpConstantComposite %7 %10 %45 %45 %10
+         %48 = OpConstantComposite %7 %45 %45 %45 %45
+          %4 = OpFunction %2 None %3
+          %5 = OpLabel
+          %9 = OpVariable %8 Function
+         %16 = OpVariable %15 Function
+         %25 = OpVariable %15 Function
+               OpStore %9 %14
+         %17 = OpLoad %7 %9
+         %18 = OpExtInst %7 %1 Tanh %17
+         %19 = OpLoad %7 %9
+         %20 = OpExtInst %7 %1 Sinh %19
+         %21 = OpLoad %7 %9
+         %22 = OpExtInst %7 %1 Cosh %21
+         %23 = OpFDiv %7 %20 %22
+         %24 = OpExtInst %6 %1 Distance %18 %23
+               OpStore %16 %24
+         %26 = OpLoad %7 %9
+         %27 = OpExtInst %7 %1 Tanh %26
+         %33 = OpExtInst %6 %1 Distance %27 %32
+               OpStore %25 %33
+         %34 = OpLoad %6 %16
+         %37 = OpFOrdLessThan %36 %34 %35
+         %38 = OpLoad %6 %25
+         %39 = OpFOrdLessThan %36 %38 %35
+         %40 = OpLogicalAnd %36 %37 %39
+               OpSelectionMerge %42 None
+               OpBranchConditional %40 %41 %47
+         %41 = OpLabel
+               OpStore %44 %46
+               OpBranch %42
+         %47 = OpLabel
+               OpStore %44 %48
+               OpBranch %42
+         %42 = 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