[Impeller] Optionally support SamplerAddressMode::kDecal on the OpenGLES backend (#46650)
fix https://github.com/flutter/flutter/issues/129358
diff --git a/impeller/entity/contents/atlas_contents.cc b/impeller/entity/contents/atlas_contents.cc
index f92c3db..34030ac 100644
--- a/impeller/entity/contents/atlas_contents.cc
+++ b/impeller/entity/contents/atlas_contents.cc
@@ -262,6 +262,8 @@
dst_sampler_descriptor.width_address_mode = SamplerAddressMode::kDecal;
dst_sampler_descriptor.height_address_mode = SamplerAddressMode::kDecal;
}
+ frag_info.supports_decal_sampler_address_mode =
+ renderer.GetDeviceCapabilities().SupportsDecalSamplerAddressMode();
auto dst_sampler = renderer.GetContext()->GetSamplerLibrary()->GetSampler(
dst_sampler_descriptor);
FS::BindTextureSamplerDst(cmd, texture_, dst_sampler);
diff --git a/impeller/entity/contents/filters/blend_filter_contents.cc b/impeller/entity/contents/filters/blend_filter_contents.cc
index 7525bda..44c33c5 100644
--- a/impeller/entity/contents/filters/blend_filter_contents.cc
+++ b/impeller/entity/contents/filters/blend_filter_contents.cc
@@ -181,6 +181,8 @@
dst_sampler_descriptor.width_address_mode = SamplerAddressMode::kDecal;
dst_sampler_descriptor.height_address_mode = SamplerAddressMode::kDecal;
}
+ blend_info.supports_decal_sampler_address_mode =
+ renderer.GetDeviceCapabilities().SupportsDecalSamplerAddressMode();
auto dst_sampler = renderer.GetContext()->GetSamplerLibrary()->GetSampler(
dst_sampler_descriptor);
FS::BindTextureSamplerDst(cmd, dst_snapshot->texture, dst_sampler);
@@ -355,6 +357,8 @@
dst_sampler_descriptor.width_address_mode = SamplerAddressMode::kDecal;
dst_sampler_descriptor.height_address_mode = SamplerAddressMode::kDecal;
}
+ blend_info.supports_decal_sampler_address_mode =
+ renderer.GetDeviceCapabilities().SupportsDecalSamplerAddressMode();
auto dst_sampler = renderer.GetContext()->GetSamplerLibrary()->GetSampler(
dst_sampler_descriptor);
FS::BindTextureSamplerDst(cmd, dst_snapshot->texture, dst_sampler);
@@ -479,6 +483,8 @@
dst_sampler_descriptor.width_address_mode = SamplerAddressMode::kDecal;
dst_sampler_descriptor.height_address_mode = SamplerAddressMode::kDecal;
}
+ frag_info.supports_decal_sampler_address_mode =
+ renderer.GetDeviceCapabilities().SupportsDecalSamplerAddressMode();
auto dst_sampler = renderer.GetContext()->GetSamplerLibrary()->GetSampler(
dst_sampler_descriptor);
FS::BindTextureSamplerDst(cmd, dst_snapshot->texture, dst_sampler);
diff --git a/impeller/entity/contents/filters/morphology_filter_contents.cc b/impeller/entity/contents/filters/morphology_filter_contents.cc
index bf7a69e..d8f087a 100644
--- a/impeller/entity/contents/filters/morphology_filter_contents.cc
+++ b/impeller/entity/contents/filters/morphology_filter_contents.cc
@@ -127,6 +127,8 @@
sampler_descriptor.width_address_mode = SamplerAddressMode::kDecal;
sampler_descriptor.height_address_mode = SamplerAddressMode::kDecal;
}
+ frag_info.supports_decal_sampler_address_mode =
+ renderer.GetDeviceCapabilities().SupportsDecalSamplerAddressMode();
FS::BindTextureSampler(
cmd, input_snapshot->texture,
diff --git a/impeller/entity/shaders/blending/advanced_blend.glsl b/impeller/entity/shaders/blending/advanced_blend.glsl
index c2e26d5..9a11dce 100644
--- a/impeller/entity/shaders/blending/advanced_blend.glsl
+++ b/impeller/entity/shaders/blending/advanced_blend.glsl
@@ -12,6 +12,7 @@
float16_t src_input_alpha;
float16_t color_factor;
f16vec4 color; // This color input is expected to be unpremultiplied.
+ float supports_decal_sampler_address_mode;
}
blend_info;
@@ -24,9 +25,12 @@
out f16vec4 frag_color;
f16vec4 Sample(f16sampler2D texture_sampler, vec2 texture_coords) {
-// gles 2.0 is the only backend without native decal support.
#ifdef IMPELLER_TARGET_OPENGLES
- return IPSampleDecal(texture_sampler, texture_coords);
+ if (blend_info.supports_decal_sampler_address_mode > 0.0) {
+ return texture(texture_sampler, texture_coords);
+ } else {
+ return IPHalfSampleDecal(texture_sampler, texture_coords);
+ }
#else
return texture(texture_sampler, texture_coords);
#endif
diff --git a/impeller/entity/shaders/blending/porter_duff_blend.frag b/impeller/entity/shaders/blending/porter_duff_blend.frag
index a24b523..7e3498f 100644
--- a/impeller/entity/shaders/blending/porter_duff_blend.frag
+++ b/impeller/entity/shaders/blending/porter_duff_blend.frag
@@ -19,6 +19,7 @@
float16_t dst_coeff_src_color;
float16_t input_alpha;
float16_t output_alpha;
+ float supports_decal_sampler_address_mode;
}
frag_info;
@@ -28,9 +29,12 @@
out f16vec4 frag_color;
f16vec4 Sample(f16sampler2D texture_sampler, vec2 texture_coords) {
-// gles 2.0 is the only backend without native decal support.
#ifdef IMPELLER_TARGET_OPENGLES
- return IPSampleDecal(texture_sampler, texture_coords);
+ if (frag_info.supports_decal_sampler_address_mode > 0.0) {
+ return texture(texture_sampler, texture_coords);
+ } else {
+ return IPHalfSampleDecal(texture_sampler, texture_coords);
+ }
#else
return texture(texture_sampler, texture_coords);
#endif
diff --git a/impeller/entity/shaders/morphology_filter.frag b/impeller/entity/shaders/morphology_filter.frag
index 8f2d01f..29428d0 100644
--- a/impeller/entity/shaders/morphology_filter.frag
+++ b/impeller/entity/shaders/morphology_filter.frag
@@ -19,6 +19,7 @@
f16vec2 uv_offset;
float16_t radius;
float16_t morph_type;
+ float supports_decal_sampler_address_mode;
}
frag_info;
@@ -32,11 +33,15 @@
for (float16_t i = -frag_info.radius; i <= frag_info.radius; i++) {
vec2 texture_coords = v_texture_coords + frag_info.uv_offset * i;
-// gles 2.0 is the only backend without native decal support.
+ f16vec4 color;
#ifdef IMPELLER_TARGET_OPENGLES
- f16vec4 color = IPHalfSampleDecal(texture_sampler, texture_coords);
+ if (frag_info.supports_decal_sampler_address_mode > 0.0) {
+ color = texture(texture_sampler, texture_coords);
+ } else {
+ color = IPHalfSampleDecal(texture_sampler, texture_coords);
+ }
#else
- f16vec4 color = texture(texture_sampler, texture_coords);
+ color = texture(texture_sampler, texture_coords);
#endif
if (frag_info.morph_type == kMorphTypeDilate) {
diff --git a/impeller/renderer/backend/gles/capabilities_gles.cc b/impeller/renderer/backend/gles/capabilities_gles.cc
index e639b14..45ad42e 100644
--- a/impeller/renderer/backend/gles/capabilities_gles.cc
+++ b/impeller/renderer/backend/gles/capabilities_gles.cc
@@ -86,6 +86,12 @@
gl.GetIntegerv(GL_NUM_SHADER_BINARY_FORMATS, &value);
num_shader_binary_formats = value;
}
+
+ if (gl.GetDescription()->HasExtension("GL_EXT_texture_border_clamp") ||
+ gl.GetDescription()->HasExtension("GL_NV_texture_border_clamp") ||
+ gl.GetDescription()->HasExtension("GL_OES_texture_border_clamp")) {
+ supports_decal_sampler_address_mode_ = true;
+ }
}
size_t CapabilitiesGLES::GetMaxTextureUnits(ShaderStage stage) const {
@@ -140,7 +146,7 @@
}
bool CapabilitiesGLES::SupportsDecalSamplerAddressMode() const {
- return false;
+ return supports_decal_sampler_address_mode_;
}
bool CapabilitiesGLES::SupportsDeviceTransientTextures() const {
diff --git a/impeller/renderer/backend/gles/capabilities_gles.h b/impeller/renderer/backend/gles/capabilities_gles.h
index b6ba085..20685f1 100644
--- a/impeller/renderer/backend/gles/capabilities_gles.h
+++ b/impeller/renderer/backend/gles/capabilities_gles.h
@@ -114,6 +114,9 @@
// |Capabilities|
PixelFormat GetDefaultDepthStencilFormat() const override;
+
+ private:
+ bool supports_decal_sampler_address_mode_ = false;
};
} // namespace impeller
diff --git a/impeller/renderer/backend/gles/context_gles.cc b/impeller/renderer/backend/gles/context_gles.cc
index 8d98d41..6896d66 100644
--- a/impeller/renderer/backend/gles/context_gles.cc
+++ b/impeller/renderer/backend/gles/context_gles.cc
@@ -53,13 +53,15 @@
}
}
+ device_capabilities_ = reactor_->GetProcTable().GetCapabilities();
+
// Create the sampler library.
{
sampler_library_ =
- std::shared_ptr<SamplerLibraryGLES>(new SamplerLibraryGLES());
+ std::shared_ptr<SamplerLibraryGLES>(new SamplerLibraryGLES(
+ device_capabilities_->SupportsDecalSamplerAddressMode()));
}
- device_capabilities_ = reactor_->GetProcTable().GetCapabilities();
is_valid_ = true;
}
diff --git a/impeller/renderer/backend/gles/gles.h b/impeller/renderer/backend/gles/gles.h
index 9bacfc8..e14116e 100644
--- a/impeller/renderer/backend/gles/gles.h
+++ b/impeller/renderer/backend/gles/gles.h
@@ -6,6 +6,7 @@
// IWYU pragma: begin_exports
#include "GLES3/gl3.h"
+#define GL_CLAMP_TO_BORDER 0x812D
#define GL_GLEXT_PROTOTYPES
#include "GLES2/gl2ext.h"
// IWYU pragma: end_exports
diff --git a/impeller/renderer/backend/gles/sampler_gles.cc b/impeller/renderer/backend/gles/sampler_gles.cc
index f1a54de..19d4e0f 100644
--- a/impeller/renderer/backend/gles/sampler_gles.cc
+++ b/impeller/renderer/backend/gles/sampler_gles.cc
@@ -53,7 +53,8 @@
FML_UNREACHABLE();
}
-static GLint ToAddressMode(SamplerAddressMode mode) {
+static GLint ToAddressMode(SamplerAddressMode mode,
+ bool supports_decal_sampler_address_mode) {
switch (mode) {
case SamplerAddressMode::kClampToEdge:
return GL_CLAMP_TO_EDGE;
@@ -62,7 +63,10 @@
case SamplerAddressMode::kMirror:
return GL_MIRRORED_REPEAT;
case SamplerAddressMode::kDecal:
- break; // Unsupported.
+ if (supports_decal_sampler_address_mode) {
+ return GL_CLAMP_TO_BORDER;
+ }
+ break;
}
FML_UNREACHABLE();
}
@@ -96,10 +100,14 @@
ToParam(desc.min_filter, mip_filter));
gl.TexParameteri(target.value(), GL_TEXTURE_MAG_FILTER,
ToParam(desc.mag_filter));
- gl.TexParameteri(target.value(), GL_TEXTURE_WRAP_S,
- ToAddressMode(desc.width_address_mode));
- gl.TexParameteri(target.value(), GL_TEXTURE_WRAP_T,
- ToAddressMode(desc.height_address_mode));
+ gl.TexParameteri(
+ target.value(), GL_TEXTURE_WRAP_S,
+ ToAddressMode(desc.width_address_mode,
+ gl.GetCapabilities()->SupportsDecalSamplerAddressMode()));
+ gl.TexParameteri(
+ target.value(), GL_TEXTURE_WRAP_T,
+ ToAddressMode(desc.height_address_mode,
+ gl.GetCapabilities()->SupportsDecalSamplerAddressMode()));
return true;
}
diff --git a/impeller/renderer/backend/gles/sampler_library_gles.cc b/impeller/renderer/backend/gles/sampler_library_gles.cc
index 7f4cd3d..6012203 100644
--- a/impeller/renderer/backend/gles/sampler_library_gles.cc
+++ b/impeller/renderer/backend/gles/sampler_library_gles.cc
@@ -11,7 +11,9 @@
namespace impeller {
-SamplerLibraryGLES::SamplerLibraryGLES() = default;
+SamplerLibraryGLES::SamplerLibraryGLES(bool supports_decal_sampler_address_mode)
+ : supports_decal_sampler_address_mode_(
+ supports_decal_sampler_address_mode) {}
// |SamplerLibrary|
SamplerLibraryGLES::~SamplerLibraryGLES() = default;
@@ -19,14 +21,12 @@
// |SamplerLibrary|
std::shared_ptr<const Sampler> SamplerLibraryGLES::GetSampler(
SamplerDescriptor descriptor) {
- // TODO(bdero): Change this validation once optional support for kDecal is
- // added to the OpenGLES backend:
- // https://github.com/flutter/flutter/issues/129358
- if (descriptor.width_address_mode == SamplerAddressMode::kDecal ||
- descriptor.height_address_mode == SamplerAddressMode::kDecal ||
- descriptor.depth_address_mode == SamplerAddressMode::kDecal) {
+ if (!supports_decal_sampler_address_mode_ &&
+ (descriptor.width_address_mode == SamplerAddressMode::kDecal ||
+ descriptor.height_address_mode == SamplerAddressMode::kDecal ||
+ descriptor.depth_address_mode == SamplerAddressMode::kDecal)) {
VALIDATION_LOG << "SamplerAddressMode::kDecal is not supported by the "
- "OpenGLES backend.";
+ "current OpenGLES backend.";
return nullptr;
}
diff --git a/impeller/renderer/backend/gles/sampler_library_gles.h b/impeller/renderer/backend/gles/sampler_library_gles.h
index 4379442..e23af54 100644
--- a/impeller/renderer/backend/gles/sampler_library_gles.h
+++ b/impeller/renderer/backend/gles/sampler_library_gles.h
@@ -12,6 +12,7 @@
class SamplerLibraryGLES final : public SamplerLibrary {
public:
+ explicit SamplerLibraryGLES(bool supports_decal_sampler_address_mode);
// |SamplerLibrary|
~SamplerLibraryGLES() override;
@@ -26,6 +27,8 @@
std::shared_ptr<const Sampler> GetSampler(
SamplerDescriptor descriptor) override;
+ bool supports_decal_sampler_address_mode_ = false;
+
FML_DISALLOW_COPY_AND_ASSIGN(SamplerLibraryGLES);
};
diff --git a/impeller/renderer/backend/gles/test/capabilities_unittests.cc b/impeller/renderer/backend/gles/test/capabilities_unittests.cc
index 0bbc1b9..189f54c 100644
--- a/impeller/renderer/backend/gles/test/capabilities_unittests.cc
+++ b/impeller/renderer/backend/gles/test/capabilities_unittests.cc
@@ -34,5 +34,15 @@
PixelFormat::kD24UnormS8Uint);
}
+TEST(CapabilitiesGLES, SupportsDecalSamplerAddressMode) {
+ auto const extensions = std::vector<const unsigned char*>{
+ reinterpret_cast<const unsigned char*>("GL_KHR_debug"), //
+ reinterpret_cast<const unsigned char*>("GL_EXT_texture_border_clamp"), //
+ };
+ auto mock_gles = MockGLES::Init(extensions);
+ auto capabilities = mock_gles->GetProcTable().GetCapabilities();
+ EXPECT_TRUE(capabilities->SupportsDecalSamplerAddressMode());
+}
+
} // namespace testing
} // namespace impeller
diff --git a/impeller/renderer/backend/gles/test/mock_gles.cc b/impeller/renderer/backend/gles/test/mock_gles.cc
index 3d4f980..1abf7e8 100644
--- a/impeller/renderer/backend/gles/test/mock_gles.cc
+++ b/impeller/renderer/backend/gles/test/mock_gles.cc
@@ -19,6 +19,8 @@
static std::weak_ptr<MockGLES> g_mock_gles;
+static std::vector<const unsigned char*> g_extensions;
+
// Has friend visibility into MockGLES to record calls.
void RecordGLCall(const char* name) {
if (auto mock_gles = g_mock_gles.lock()) {
@@ -37,7 +39,7 @@
auto const kMockVendor = (unsigned char*)"MockGLES";
auto const kMockVersion = (unsigned char*)"3.0";
-auto const kExtensions = std::vector<unsigned char*>{
+auto const kExtensions = std::vector<const unsigned char*>{
(unsigned char*)"GL_KHR_debug" //
};
@@ -60,7 +62,7 @@
const unsigned char* mockGetStringi(GLenum name, GLuint index) {
switch (name) {
case GL_EXTENSIONS:
- return kExtensions[index];
+ return g_extensions[index];
default:
return (unsigned char*)"";
}
@@ -72,7 +74,7 @@
void mockGetIntegerv(GLenum name, int* value) {
switch (name) {
case GL_NUM_EXTENSIONS: {
- *value = kExtensions.size();
+ *value = g_extensions.size();
} break;
case GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS:
*value = 8;
@@ -110,10 +112,12 @@
static_assert(CheckSameSignature<decltype(mockPushDebugGroupKHR), //
decltype(glPushDebugGroupKHR)>::value);
-std::shared_ptr<MockGLES> MockGLES::Init() {
+std::shared_ptr<MockGLES> MockGLES::Init(
+ const std::optional<std::vector<const unsigned char*>>& extensions) {
// If we cannot obtain a lock, MockGLES is already being used elsewhere.
FML_CHECK(g_test_lock.try_lock())
<< "MockGLES is already being used by another test.";
+ g_extensions = extensions.value_or(kExtensions);
auto mock_gles = std::shared_ptr<MockGLES>(new MockGLES());
g_mock_gles = mock_gles;
return mock_gles;
diff --git a/impeller/renderer/backend/gles/test/mock_gles.h b/impeller/renderer/backend/gles/test/mock_gles.h
index ec548ed..fb29715 100644
--- a/impeller/renderer/backend/gles/test/mock_gles.h
+++ b/impeller/renderer/backend/gles/test/mock_gles.h
@@ -3,6 +3,7 @@
// found in the LICENSE file.
#include <memory>
+#include <optional>
#include "fml/macros.h"
#include "impeller/renderer/backend/gles/proc_table_gles.h"
@@ -24,7 +25,9 @@
/// This method overwrites mocked global GLES function pointers to record
/// invocations on this instance of |MockGLES|. As such, it should only be
/// called once per test.
- static std::shared_ptr<MockGLES> Init();
+ static std::shared_ptr<MockGLES> Init(
+ const std::optional<std::vector<const unsigned char*>>& extensions =
+ std::nullopt);
/// @brief Returns a configured |ProcTableGLES| instance.
const ProcTableGLES& GetProcTable() const { return proc_table_; }
diff --git a/impeller/tools/malioc.json b/impeller/tools/malioc.json
index 3924493..3f20eb4 100644
--- a/impeller/tools/malioc.json
+++ b/impeller/tools/malioc.json
@@ -3820,7 +3820,7 @@
"longest_path_cycles": [
0.609375,
0.609375,
- 0.4375,
+ 0.46875,
0.5,
0.0,
0.5,
@@ -3842,24 +3842,23 @@
"shortest_path_cycles": [
0.34375,
0.34375,
- 0.3125,
- 0.1875,
+ 0.265625,
+ 0.0,
0.0,
0.25,
- 0.0
+ 0.25
],
"total_bound_pipelines": [
- "arith_total",
- "arith_fma"
+ "texture"
],
"total_cycles": [
0.609375,
0.609375,
- 0.484375,
+ 0.578125,
0.5,
0.0,
0.5,
- 0.5
+ 1.0
]
},
"stack_spill_bytes": 0,
@@ -3882,7 +3881,7 @@
"arithmetic"
],
"longest_path_cycles": [
- 8.90999984741211,
+ 9.569999694824219,
2.0,
2.0
],
@@ -3895,7 +3894,7 @@
"arithmetic"
],
"shortest_path_cycles": [
- 5.28000020980835,
+ 4.949999809265137,
1.0,
0.0
],
@@ -3903,13 +3902,13 @@
"arithmetic"
],
"total_cycles": [
- 9.666666984558105,
+ 11.0,
2.0,
- 2.0
+ 4.0
]
},
"thread_occupancy": 100,
- "uniform_registers_used": 1,
+ "uniform_registers_used": 2,
"work_registers_used": 3
}
}
@@ -3936,9 +3935,9 @@
"arith_cvt"
],
"longest_path_cycles": [
- 0.578125,
+ 0.637499988079071,
0.28125,
- 0.578125,
+ 0.637499988079071,
0.5625,
0.0,
0.5,
@@ -3958,26 +3957,25 @@
"arith_cvt"
],
"shortest_path_cycles": [
- 0.453125,
+ 0.40625,
0.25,
- 0.453125,
- 0.375,
+ 0.40625,
+ 0.1875,
0.0,
0.25,
- 0.0
+ 0.25
],
"total_bound_pipelines": [
- "arith_total",
- "arith_cvt"
+ "texture"
],
"total_cycles": [
- 0.625,
+ 0.75,
0.28125,
- 0.625,
+ 0.75,
0.5625,
0.0,
0.5,
- 0.5
+ 1.0
]
},
"stack_spill_bytes": 0,
@@ -4000,7 +3998,7 @@
"arithmetic"
],
"longest_path_cycles": [
- 9.569999694824219,
+ 10.229999542236328,
2.0,
2.0
],
@@ -4013,7 +4011,7 @@
"arithmetic"
],
"shortest_path_cycles": [
- 7.920000076293945,
+ 7.590000152587891,
1.0,
0.0
],
@@ -4021,13 +4019,13 @@
"arithmetic"
],
"total_cycles": [
- 10.333333015441895,
+ 11.666666984558105,
2.0,
- 2.0
+ 4.0
]
},
"thread_occupancy": 100,
- "uniform_registers_used": 1,
+ "uniform_registers_used": 2,
"work_registers_used": 2
}
}
@@ -4051,13 +4049,12 @@
"performance": {
"longest_path_bound_pipelines": [
"arith_total",
- "arith_cvt",
- "arith_sfu"
+ "arith_cvt"
],
"longest_path_cycles": [
- 0.5625,
+ 0.625,
0.25,
- 0.5625,
+ 0.625,
0.5625,
0.0,
0.5,
@@ -4077,26 +4074,25 @@
"arith_cvt"
],
"shortest_path_cycles": [
- 0.4375,
+ 0.390625,
0.21875,
- 0.4375,
- 0.375,
+ 0.390625,
+ 0.1875,
0.0,
0.25,
- 0.0
+ 0.25
],
"total_bound_pipelines": [
- "arith_total",
- "arith_cvt"
+ "texture"
],
"total_cycles": [
- 0.609375,
+ 0.737500011920929,
0.25,
- 0.609375,
+ 0.737500011920929,
0.5625,
0.0,
0.5,
- 0.5
+ 1.0
]
},
"stack_spill_bytes": 0,
@@ -4119,7 +4115,7 @@
"arithmetic"
],
"longest_path_cycles": [
- 9.569999694824219,
+ 10.229999542236328,
2.0,
2.0
],
@@ -4132,7 +4128,7 @@
"arithmetic"
],
"shortest_path_cycles": [
- 7.920000076293945,
+ 7.590000152587891,
1.0,
0.0
],
@@ -4140,13 +4136,13 @@
"arithmetic"
],
"total_cycles": [
- 10.333333015441895,
+ 11.666666984558105,
2.0,
- 2.0
+ 4.0
]
},
"thread_occupancy": 100,
- "uniform_registers_used": 1,
+ "uniform_registers_used": 2,
"work_registers_used": 2
}
}
@@ -4173,9 +4169,9 @@
"texture"
],
"longest_path_cycles": [
- 0.375,
+ 0.40625,
0.1875,
- 0.34375,
+ 0.40625,
0.375,
0.0,
0.5,
@@ -4191,29 +4187,29 @@
"texture"
],
"shortest_path_bound_pipelines": [
- "varying"
- ],
- "shortest_path_cycles": [
- 0.21875,
- 0.15625,
- 0.21875,
- 0.1875,
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