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dsafdsaf132 merged 2 commits into from
Jun 10, 2026
Merged

[codex] Expose small WebGL extensions #19

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2a8d1b5
Expose small WebGL extensions
dsafdsaf132 Jun 10, 2026
72cf9d4
Enable float blend with float extensions
dsafdsaf132 Jun 10, 2026
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2 changes: 2 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -48,9 +48,11 @@ backend.
| `EXT_color_buffer_float` / `WEBGL_color_buffer_float` | Exposed |
| `EXT_color_buffer_half_float` | Exposed |
| `EXT_frag_depth` | Exposed |
| `EXT_float_blend` | Exposed |
| `EXT_sRGB` | Exposed |
| `EXT_shader_texture_lod` | Exposed |
| `EXT_texture_filter_anisotropic` | Exposed |
| `EXT_texture_mirror_clamp_to_edge` | Exposed |
| `OES_element_index_uint` | Exposed |
| `OES_standard_derivatives` | Exposed |
| `OES_texture_float` / `OES_texture_float_linear` | Exposed |
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2 changes: 2 additions & 0 deletions binding/binding.cc
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Expand Up @@ -39,9 +39,11 @@ static napi_value InitBinding(napi_env env, napi_value exports) {
EXTColorBufferFloatExtension::Register(env, exports);
EXTColorBufferHalfFloatExtension::Register(env, exports);
EXTFragDepthExtension::Register(env, exports);
EXTFloatBlendExtension::Register(env, exports);
EXTShaderTextureLodExtension::Register(env, exports);
EXTSRGBExtension::Register(env, exports);
EXTTextureFilterAnisotropicExtension::Register(env, exports);
EXTTextureMirrorClampToEdgeExtension::Register(env, exports);
OESElementIndexUintExtension::Register(env, exports);
OESStandardDerivativesExtension::Register(env, exports);
OESTextureFloatExtension::Register(env, exports);
Expand Down
108 changes: 108 additions & 0 deletions binding/webgl_extensions.cc
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Expand Up @@ -41,6 +41,15 @@ namespace nodejsgl {
egl_context_wrapper->gl_extensions->HasExtension(ext_name);
#endif

static void RequestExtensionIfAvailable(EGLContextWrapper* egl_context_wrapper,
const char* ext_name) {
if (egl_context_wrapper->angle_requestable_extensions->HasExtension(
ext_name) ||
egl_context_wrapper->gl_extensions->HasExtension(ext_name)) {
egl_context_wrapper->glRequestExtensionANGLE(ext_name);
}
}

//==============================================================================
// GLExtensionBase

Expand Down Expand Up @@ -210,6 +219,7 @@ napi_status EXTColorBufferFloatExtension::NewInstance(
ENSURE_NAPI_OK_RETVAL(env, nstatus, nstatus);

egl_context_wrapper->glRequestExtensionANGLE("GL_EXT_color_buffer_float");
RequestExtensionIfAvailable(egl_context_wrapper, "GL_EXT_float_blend");
egl_context_wrapper->RefreshGLExtensions();

return napi_ok;
Expand Down Expand Up @@ -307,6 +317,51 @@ napi_status EXTFragDepthExtension::NewInstance(
return napi_ok;
}

//==============================================================================
// EXTFloatBlendExtension

napi_ref EXTFloatBlendExtension::constructor_ref_;

EXTFloatBlendExtension::EXTFloatBlendExtension(napi_env env)
: GLExtensionBase(env) {}

/* static */
bool EXTFloatBlendExtension::IsSupported(
EGLContextWrapper* egl_context_wrapper) {
IS_EXTENSION_NAME_AVAILABLE("GL_EXT_float_blend");
}

/* static */
napi_status EXTFloatBlendExtension::Register(napi_env env, napi_value exports) {
napi_status nstatus;

napi_value ctor_value;
nstatus = napi_define_class(env, "EXT_float_blend", NAPI_AUTO_LENGTH,
GLExtensionBase::InitStubClass, nullptr, 0,
nullptr, &ctor_value);
ENSURE_NAPI_OK_RETVAL(env, nstatus, nstatus);

nstatus = napi_create_reference(env, ctor_value, 1, &constructor_ref_);
ENSURE_NAPI_OK_RETVAL(env, nstatus, nstatus);

return napi_ok;
}

/* static */
napi_status EXTFloatBlendExtension::NewInstance(
napi_env env, napi_value* instance,
EGLContextWrapper* egl_context_wrapper) {
ENSURE_EXTENSION_IS_SUPPORTED

napi_status nstatus = NewInstanceBase(env, constructor_ref_, instance);
ENSURE_NAPI_OK_RETVAL(env, nstatus, nstatus);

egl_context_wrapper->glRequestExtensionANGLE("GL_EXT_float_blend");
egl_context_wrapper->RefreshGLExtensions();

return napi_ok;
}

//==============================================================================
// EXTShaderTextureLodExtension

Expand Down Expand Up @@ -460,6 +515,58 @@ napi_status EXTTextureFilterAnisotropicExtension::NewInstance(
return napi_ok;
}

//==============================================================================
// EXTTextureMirrorClampToEdgeExtension

napi_ref EXTTextureMirrorClampToEdgeExtension::constructor_ref_;

EXTTextureMirrorClampToEdgeExtension::EXTTextureMirrorClampToEdgeExtension(
napi_env env)
: GLExtensionBase(env) {}

/* static */
bool EXTTextureMirrorClampToEdgeExtension::IsSupported(
EGLContextWrapper* egl_context_wrapper) {
IS_EXTENSION_NAME_AVAILABLE("GL_EXT_texture_mirror_clamp_to_edge");
}

/* static */
napi_status EXTTextureMirrorClampToEdgeExtension::Register(napi_env env,
napi_value exports) {
napi_status nstatus;

napi_property_descriptor properties[] = {NapiDefineIntProperty(
env, GL_MIRROR_CLAMP_TO_EDGE_EXT, "MIRROR_CLAMP_TO_EDGE_EXT")};

napi_value ctor_value;
nstatus = napi_define_class(env, "EXT_texture_mirror_clamp_to_edge",
NAPI_AUTO_LENGTH, GLExtensionBase::InitStubClass,
nullptr, ARRAY_SIZE(properties), properties,
&ctor_value);
ENSURE_NAPI_OK_RETVAL(env, nstatus, nstatus);

nstatus = napi_create_reference(env, ctor_value, 1, &constructor_ref_);
ENSURE_NAPI_OK_RETVAL(env, nstatus, nstatus);

return napi_ok;
}

/* static */
napi_status EXTTextureMirrorClampToEdgeExtension::NewInstance(
napi_env env, napi_value* instance,
EGLContextWrapper* egl_context_wrapper) {
ENSURE_EXTENSION_IS_SUPPORTED

napi_status nstatus = NewInstanceBase(env, constructor_ref_, instance);
ENSURE_NAPI_OK_RETVAL(env, nstatus, nstatus);

egl_context_wrapper->glRequestExtensionANGLE(
"GL_EXT_texture_mirror_clamp_to_edge");
egl_context_wrapper->RefreshGLExtensions();

return napi_ok;
}

//==============================================================================
// OESElementIndexUintExtension

Expand Down Expand Up @@ -601,6 +708,7 @@ napi_status OESTextureFloatExtension::NewInstance(
"GL_CHROMIUM_color_buffer_float_rgba");
egl_context_wrapper->glRequestExtensionANGLE(
"GL_CHROMIUM_color_buffer_float_rgb");
RequestExtensionIfAvailable(egl_context_wrapper, "GL_EXT_float_blend");
egl_context_wrapper->RefreshGLExtensions();

return napi_ok;
Expand Down
20 changes: 20 additions & 0 deletions binding/webgl_extensions.h
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Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,16 @@ class EXTFragDepthExtension : public GLExtensionBase {
virtual ~EXTFragDepthExtension() {}
};

// Provides 'EXT_float_blend':
// https://registry.khronos.org/webgl/extensions/EXT_float_blend/
class EXTFloatBlendExtension : public GLExtensionBase {
NAPI_BOOTSTRAP_METHODS

protected:
EXTFloatBlendExtension(napi_env env);
virtual ~EXTFloatBlendExtension() {}
};

// Provides 'EXT_shader_texture_lod':
// https://www.khronos.org/registry/webgl/extensions/EXT_shader_texture_lod/
class EXTShaderTextureLodExtension : public GLExtensionBase {
Expand Down Expand Up @@ -141,6 +151,16 @@ class EXTTextureFilterAnisotropicExtension : public GLExtensionBase {
virtual ~EXTTextureFilterAnisotropicExtension() {}
};

// Provides 'EXT_texture_mirror_clamp_to_edge':
// https://registry.khronos.org/webgl/extensions/EXT_texture_mirror_clamp_to_edge/
class EXTTextureMirrorClampToEdgeExtension : public GLExtensionBase {
NAPI_BOOTSTRAP_METHODS

protected:
EXTTextureMirrorClampToEdgeExtension(napi_env env);
virtual ~EXTTextureMirrorClampToEdgeExtension() {}
};

// Provides 'OES_element_index_uint':
// https://www.khronos.org/registry/webgl/extensions/OES_element_index_uint/
class OESElementIndexUintExtension : public GLExtensionBase {
Expand Down
6 changes: 6 additions & 0 deletions binding/webgl_rendering_context.cc
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Expand Up @@ -6229,11 +6229,14 @@ DEFINE_EXTENSION_DESCRIPTOR_HELPERS(EXTColorBufferFloat,
DEFINE_EXTENSION_DESCRIPTOR_HELPERS(EXTColorBufferHalfFloat,
EXTColorBufferHalfFloatExtension)
DEFINE_EXTENSION_DESCRIPTOR_HELPERS(EXTFragDepth, EXTFragDepthExtension)
DEFINE_EXTENSION_DESCRIPTOR_HELPERS(EXTFloatBlend, EXTFloatBlendExtension)
DEFINE_EXTENSION_DESCRIPTOR_HELPERS(EXTSRGB, EXTSRGBExtension)
DEFINE_EXTENSION_DESCRIPTOR_HELPERS(EXTShaderTextureLod,
EXTShaderTextureLodExtension)
DEFINE_EXTENSION_DESCRIPTOR_HELPERS(EXTTextureFilterAnisotropic,
EXTTextureFilterAnisotropicExtension)
DEFINE_EXTENSION_DESCRIPTOR_HELPERS(EXTTextureMirrorClampToEdge,
EXTTextureMirrorClampToEdgeExtension)
DEFINE_EXTENSION_DESCRIPTOR_HELPERS(OESElementIndexUint,
OESElementIndexUintExtension)
DEFINE_EXTENSION_DESCRIPTOR_HELPERS(OESStandardDerivatives,
Expand Down Expand Up @@ -6276,11 +6279,14 @@ static const WebGLExtensionDescriptor kKnownWebGLExtensions[] = {
{"EXT_color_buffer_half_float", SupportsEXTColorBufferHalfFloat,
NewEXTColorBufferHalfFloat},
{"EXT_frag_depth", SupportsEXTFragDepth, NewEXTFragDepth},
{"EXT_float_blend", SupportsEXTFloatBlend, NewEXTFloatBlend},
Comment thread
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{"EXT_sRGB", SupportsEXTSRGB, NewEXTSRGB},
{"EXT_shader_texture_lod", SupportsEXTShaderTextureLod,
NewEXTShaderTextureLod},
{"EXT_texture_filter_anisotropic", SupportsEXTTextureFilterAnisotropic,
NewEXTTextureFilterAnisotropic},
{"EXT_texture_mirror_clamp_to_edge", SupportsEXTTextureMirrorClampToEdge,
NewEXTTextureMirrorClampToEdge},
{"OES_element_index_uint", SupportsOESElementIndexUint,
NewOESElementIndexUint},
{"OES_standard_derivatives", SupportsOESStandardDerivatives,
Expand Down
10 changes: 10 additions & 0 deletions src/binding.ts
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Expand Up @@ -77,6 +77,12 @@ export type NodeGlesWEBGLDrawBuffers = {
drawBuffersWEBGL(buffers: number[] | Uint32Array): void;
};

export type NodeGlesEXTFloatBlend = {};

export type NodeGlesEXTTextureMirrorClampToEdge = {
readonly MIRROR_CLAMP_TO_EDGE_EXT: number;
};

export type NodeGlesWebGL2RenderingContext = WebGL2RenderingContext & {
drawingBufferColorSpace: "srgb" | "display-p3";
readonly drawingBufferFormat: number;
Expand Down Expand Up @@ -183,6 +189,10 @@ export type NodeGlesWebGL2RenderingContext = WebGL2RenderingContext & {
srcOffsetOrOffset?: number, srcLengthOverride?: number): void;
getExtension(extensionName: "ANGLE_instanced_arrays"):
NodeGlesANGLEInstancedArrays | null;
getExtension(extensionName: "EXT_float_blend"):
NodeGlesEXTFloatBlend | null;
getExtension(extensionName: "EXT_texture_mirror_clamp_to_edge"):
NodeGlesEXTTextureMirrorClampToEdge | null;
getExtension(extensionName: "OES_vertex_array_object"):
NodeGlesOESVertexArrayObject | null;
getExtension(extensionName: "WEBGL_draw_buffers"):
Expand Down
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