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WebGLTextures.js
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import { LinearFilter, LinearMipmapLinearFilter, LinearMipmapNearestFilter, NearestFilter, NearestMipmapLinearFilter, NearestMipmapNearestFilter, RGBAFormat, DepthFormat, DepthStencilFormat, UnsignedIntType, FloatType, MirroredRepeatWrapping, ClampToEdgeWrapping, RepeatWrapping, UnsignedByteType, NoColorSpace, LinearSRGBColorSpace, NeverCompare, AlwaysCompare, LessCompare, LessEqualCompare, EqualCompare, GreaterEqualCompare, GreaterCompare, NotEqualCompare, SRGBTransfer, LinearTransfer, UnsignedShortType, UnsignedInt248Type } from '../../constants.js';
import { createElementNS } from '../../utils.js';
import { ColorManagement } from '../../math/ColorManagement.js';
import { Vector2 } from '../../math/Vector2.js';
import { getByteLength } from '../../extras/TextureUtils.js';
function WebGLTextures( _gl, extensions, state, properties, capabilities, utils, info ) {
const multisampledRTTExt = extensions.has( 'WEBGL_multisampled_render_to_texture' ) ? extensions.get( 'WEBGL_multisampled_render_to_texture' ) : null;
const supportsInvalidateFramebuffer = typeof navigator === 'undefined' ? false : /OculusBrowser/g.test( navigator.userAgent );
const _imageDimensions = new Vector2();
const _videoTextures = new WeakMap();
let _canvas;
const _sources = new WeakMap(); // maps WebglTexture objects to instances of Source
// cordova iOS (as of 5.0) still uses UIWebView, which provides OffscreenCanvas,
// also OffscreenCanvas.getContext("webgl"), but not OffscreenCanvas.getContext("2d")!
// Some implementations may only implement OffscreenCanvas partially (e.g. lacking 2d).
let useOffscreenCanvas = false;
try {
useOffscreenCanvas = typeof OffscreenCanvas !== 'undefined'
// eslint-disable-next-line compat/compat
&& ( new OffscreenCanvas( 1, 1 ).getContext( '2d' ) ) !== null;
} catch ( err ) {
// Ignore any errors
}
function createCanvas( width, height ) {
// Use OffscreenCanvas when available. Specially needed in web workers
return useOffscreenCanvas ?
// eslint-disable-next-line compat/compat
new OffscreenCanvas( width, height ) : createElementNS( 'canvas' );
}
function resizeImage( image, needsNewCanvas, maxSize ) {
let scale = 1;
const dimensions = getDimensions( image );
// handle case if texture exceeds max size
if ( dimensions.width > maxSize || dimensions.height > maxSize ) {
scale = maxSize / Math.max( dimensions.width, dimensions.height );
}
// only perform resize if necessary
if ( scale < 1 ) {
// only perform resize for certain image types
if ( ( typeof HTMLImageElement !== 'undefined' && image instanceof HTMLImageElement ) ||
( typeof HTMLCanvasElement !== 'undefined' && image instanceof HTMLCanvasElement ) ||
( typeof ImageBitmap !== 'undefined' && image instanceof ImageBitmap ) ||
( typeof VideoFrame !== 'undefined' && image instanceof VideoFrame ) ) {
const width = Math.floor( scale * dimensions.width );
const height = Math.floor( scale * dimensions.height );
if ( _canvas === undefined ) _canvas = createCanvas( width, height );
// cube textures can't reuse the same canvas
const canvas = needsNewCanvas ? createCanvas( width, height ) : _canvas;
canvas.width = width;
canvas.height = height;
const context = canvas.getContext( '2d' );
context.drawImage( image, 0, 0, width, height );
console.warn( 'THREE.WebGLRenderer: Texture has been resized from (' + dimensions.width + 'x' + dimensions.height + ') to (' + width + 'x' + height + ').' );
return canvas;
} else {
if ( 'data' in image ) {
console.warn( 'THREE.WebGLRenderer: Image in DataTexture is too big (' + dimensions.width + 'x' + dimensions.height + ').' );
}
return image;
}
}
return image;
}
function textureNeedsGenerateMipmaps( texture ) {
return texture.generateMipmaps;
}
function generateMipmap( target ) {
_gl.generateMipmap( target );
}
function getTargetType( texture ) {
if ( texture.isWebGLCubeRenderTarget ) return _gl.TEXTURE_CUBE_MAP;
if ( texture.isWebGL3DRenderTarget ) return _gl.TEXTURE_3D;
if ( texture.isWebGLArrayRenderTarget || texture.isCompressedArrayTexture ) return _gl.TEXTURE_2D_ARRAY;
return _gl.TEXTURE_2D;
}
function getInternalFormat( internalFormatName, glFormat, glType, colorSpace, forceLinearTransfer = false ) {
if ( internalFormatName !== null ) {
if ( _gl[ internalFormatName ] !== undefined ) return _gl[ internalFormatName ];
console.warn( 'THREE.WebGLRenderer: Attempt to use non-existing WebGL internal format \'' + internalFormatName + '\'' );
}
let internalFormat = glFormat;
if ( glFormat === _gl.RED ) {
if ( glType === _gl.FLOAT ) internalFormat = _gl.R32F;
if ( glType === _gl.HALF_FLOAT ) internalFormat = _gl.R16F;
if ( glType === _gl.UNSIGNED_BYTE ) internalFormat = _gl.R8;
}
if ( glFormat === _gl.RED_INTEGER ) {
if ( glType === _gl.UNSIGNED_BYTE ) internalFormat = _gl.R8UI;
if ( glType === _gl.UNSIGNED_SHORT ) internalFormat = _gl.R16UI;
if ( glType === _gl.UNSIGNED_INT ) internalFormat = _gl.R32UI;
if ( glType === _gl.BYTE ) internalFormat = _gl.R8I;
if ( glType === _gl.SHORT ) internalFormat = _gl.R16I;
if ( glType === _gl.INT ) internalFormat = _gl.R32I;
}
if ( glFormat === _gl.RG ) {
if ( glType === _gl.FLOAT ) internalFormat = _gl.RG32F;
if ( glType === _gl.HALF_FLOAT ) internalFormat = _gl.RG16F;
if ( glType === _gl.UNSIGNED_BYTE ) internalFormat = _gl.RG8;
}
if ( glFormat === _gl.RG_INTEGER ) {
if ( glType === _gl.UNSIGNED_BYTE ) internalFormat = _gl.RG8UI;
if ( glType === _gl.UNSIGNED_SHORT ) internalFormat = _gl.RG16UI;
if ( glType === _gl.UNSIGNED_INT ) internalFormat = _gl.RG32UI;
if ( glType === _gl.BYTE ) internalFormat = _gl.RG8I;
if ( glType === _gl.SHORT ) internalFormat = _gl.RG16I;
if ( glType === _gl.INT ) internalFormat = _gl.RG32I;
}
if ( glFormat === _gl.RGB_INTEGER ) {
if ( glType === _gl.UNSIGNED_BYTE ) internalFormat = _gl.RGB8UI;
if ( glType === _gl.UNSIGNED_SHORT ) internalFormat = _gl.RGB16UI;
if ( glType === _gl.UNSIGNED_INT ) internalFormat = _gl.RGB32UI;
if ( glType === _gl.BYTE ) internalFormat = _gl.RGB8I;
if ( glType === _gl.SHORT ) internalFormat = _gl.RGB16I;
if ( glType === _gl.INT ) internalFormat = _gl.RGB32I;
}
if ( glFormat === _gl.RGBA_INTEGER ) {
if ( glType === _gl.UNSIGNED_BYTE ) internalFormat = _gl.RGBA8UI;
if ( glType === _gl.UNSIGNED_SHORT ) internalFormat = _gl.RGBA16UI;
if ( glType === _gl.UNSIGNED_INT ) internalFormat = _gl.RGBA32UI;
if ( glType === _gl.BYTE ) internalFormat = _gl.RGBA8I;
if ( glType === _gl.SHORT ) internalFormat = _gl.RGBA16I;
if ( glType === _gl.INT ) internalFormat = _gl.RGBA32I;
}
if ( glFormat === _gl.RGB ) {
if ( glType === _gl.UNSIGNED_INT_5_9_9_9_REV ) internalFormat = _gl.RGB9_E5;
}
if ( glFormat === _gl.RGBA ) {
const transfer = forceLinearTransfer ? LinearTransfer : ColorManagement.getTransfer( colorSpace );
if ( glType === _gl.FLOAT ) internalFormat = _gl.RGBA32F;
if ( glType === _gl.HALF_FLOAT ) internalFormat = _gl.RGBA16F;
if ( glType === _gl.UNSIGNED_BYTE ) internalFormat = ( transfer === SRGBTransfer ) ? _gl.SRGB8_ALPHA8 : _gl.RGBA8;
if ( glType === _gl.UNSIGNED_SHORT_4_4_4_4 ) internalFormat = _gl.RGBA4;
if ( glType === _gl.UNSIGNED_SHORT_5_5_5_1 ) internalFormat = _gl.RGB5_A1;
}
if ( internalFormat === _gl.R16F || internalFormat === _gl.R32F ||
internalFormat === _gl.RG16F || internalFormat === _gl.RG32F ||
internalFormat === _gl.RGBA16F || internalFormat === _gl.RGBA32F ) {
extensions.get( 'EXT_color_buffer_float' );
}
return internalFormat;
}
function getInternalDepthFormat( useStencil, depthType ) {
let glInternalFormat;
if ( useStencil ) {
if ( depthType === null || depthType === UnsignedIntType || depthType === UnsignedInt248Type ) {
glInternalFormat = _gl.DEPTH24_STENCIL8;
} else if ( depthType === FloatType ) {
glInternalFormat = _gl.DEPTH32F_STENCIL8;
} else if ( depthType === UnsignedShortType ) {
glInternalFormat = _gl.DEPTH24_STENCIL8;
console.warn( 'DepthTexture: 16 bit depth attachment is not supported with stencil. Using 24-bit attachment.' );
}
} else {
if ( depthType === null || depthType === UnsignedIntType || depthType === UnsignedInt248Type ) {
glInternalFormat = _gl.DEPTH_COMPONENT24;
} else if ( depthType === FloatType ) {
glInternalFormat = _gl.DEPTH_COMPONENT32F;
} else if ( depthType === UnsignedShortType ) {
glInternalFormat = _gl.DEPTH_COMPONENT16;
}
}
return glInternalFormat;
}
function getMipLevels( texture, image ) {
if ( textureNeedsGenerateMipmaps( texture ) === true || ( texture.isFramebufferTexture && texture.minFilter !== NearestFilter && texture.minFilter !== LinearFilter ) ) {
return Math.log2( Math.max( image.width, image.height ) ) + 1;
} else if ( texture.mipmaps !== undefined && texture.mipmaps.length > 0 ) {
// user-defined mipmaps
return texture.mipmaps.length;
} else if ( texture.isCompressedTexture && Array.isArray( texture.image ) ) {
return image.mipmaps.length;
} else {
// texture without mipmaps (only base level)
return 1;
}
}
//
function onTextureDispose( event ) {
const texture = event.target;
texture.removeEventListener( 'dispose', onTextureDispose );
deallocateTexture( texture );
if ( texture.isVideoTexture ) {
_videoTextures.delete( texture );
}
}
function onRenderTargetDispose( event ) {
const renderTarget = event.target;
renderTarget.removeEventListener( 'dispose', onRenderTargetDispose );
deallocateRenderTarget( renderTarget );
}
//
function deallocateTexture( texture ) {
const textureProperties = properties.get( texture );
if ( textureProperties.__webglInit === undefined ) return;
// check if it's necessary to remove the WebGLTexture object
const source = texture.source;
const webglTextures = _sources.get( source );
if ( webglTextures ) {
const webglTexture = webglTextures[ textureProperties.__cacheKey ];
webglTexture.usedTimes --;
// the WebGLTexture object is not used anymore, remove it
if ( webglTexture.usedTimes === 0 ) {
deleteTexture( texture );
}
// remove the weak map entry if no WebGLTexture uses the source anymore
if ( Object.keys( webglTextures ).length === 0 ) {
_sources.delete( source );
}
}
properties.remove( texture );
}
function deleteTexture( texture ) {
const textureProperties = properties.get( texture );
_gl.deleteTexture( textureProperties.__webglTexture );
const source = texture.source;
const webglTextures = _sources.get( source );
delete webglTextures[ textureProperties.__cacheKey ];
info.memory.textures --;
}
function deallocateRenderTarget( renderTarget ) {
const renderTargetProperties = properties.get( renderTarget );
if ( renderTarget.depthTexture ) {
renderTarget.depthTexture.dispose();
properties.remove( renderTarget.depthTexture );
}
if ( renderTarget.isWebGLCubeRenderTarget ) {
for ( let i = 0; i < 6; i ++ ) {
if ( Array.isArray( renderTargetProperties.__webglFramebuffer[ i ] ) ) {
for ( let level = 0; level < renderTargetProperties.__webglFramebuffer[ i ].length; level ++ ) _gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ][ level ] );
} else {
_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ i ] );
}
if ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer[ i ] );
}
} else {
if ( Array.isArray( renderTargetProperties.__webglFramebuffer ) ) {
for ( let level = 0; level < renderTargetProperties.__webglFramebuffer.length; level ++ ) _gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer[ level ] );
} else {
_gl.deleteFramebuffer( renderTargetProperties.__webglFramebuffer );
}
if ( renderTargetProperties.__webglDepthbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthbuffer );
if ( renderTargetProperties.__webglMultisampledFramebuffer ) _gl.deleteFramebuffer( renderTargetProperties.__webglMultisampledFramebuffer );
if ( renderTargetProperties.__webglColorRenderbuffer ) {
for ( let i = 0; i < renderTargetProperties.__webglColorRenderbuffer.length; i ++ ) {
if ( renderTargetProperties.__webglColorRenderbuffer[ i ] ) _gl.deleteRenderbuffer( renderTargetProperties.__webglColorRenderbuffer[ i ] );
}
}
if ( renderTargetProperties.__webglDepthRenderbuffer ) _gl.deleteRenderbuffer( renderTargetProperties.__webglDepthRenderbuffer );
}
const textures = renderTarget.textures;
for ( let i = 0, il = textures.length; i < il; i ++ ) {
const attachmentProperties = properties.get( textures[ i ] );
if ( attachmentProperties.__webglTexture ) {
_gl.deleteTexture( attachmentProperties.__webglTexture );
info.memory.textures --;
}
properties.remove( textures[ i ] );
}
properties.remove( renderTarget );
}
//
let textureUnits = 0;
function resetTextureUnits() {
textureUnits = 0;
}
function allocateTextureUnit() {
const textureUnit = textureUnits;
if ( textureUnit >= capabilities.maxTextures ) {
console.warn( 'THREE.WebGLTextures: Trying to use ' + textureUnit + ' texture units while this GPU supports only ' + capabilities.maxTextures );
}
textureUnits += 1;
return textureUnit;
}
function getTextureCacheKey( texture ) {
const array = [];
array.push( texture.wrapS );
array.push( texture.wrapT );
array.push( texture.wrapR || 0 );
array.push( texture.magFilter );
array.push( texture.minFilter );
array.push( texture.anisotropy );
array.push( texture.internalFormat );
array.push( texture.format );
array.push( texture.type );
array.push( texture.generateMipmaps );
array.push( texture.premultiplyAlpha );
array.push( texture.flipY );
array.push( texture.unpackAlignment );
array.push( texture.colorSpace );
return array.join();
}
//
function setTexture2D( texture, slot ) {
const textureProperties = properties.get( texture );
if ( texture.isVideoTexture ) updateVideoTexture( texture );
if ( texture.isRenderTargetTexture === false && texture.version > 0 && textureProperties.__version !== texture.version ) {
const image = texture.image;
if ( image === null ) {
console.warn( 'THREE.WebGLRenderer: Texture marked for update but no image data found.' );
} else if ( image.complete === false ) {
console.warn( 'THREE.WebGLRenderer: Texture marked for update but image is incomplete' );
} else {
uploadTexture( textureProperties, texture, slot );
return;
}
}
state.bindTexture( _gl.TEXTURE_2D, textureProperties.__webglTexture, _gl.TEXTURE0 + slot );
}
function setTexture2DArray( texture, slot ) {
const textureProperties = properties.get( texture );
if ( texture.version > 0 && textureProperties.__version !== texture.version ) {
uploadTexture( textureProperties, texture, slot );
return;
}
state.bindTexture( _gl.TEXTURE_2D_ARRAY, textureProperties.__webglTexture, _gl.TEXTURE0 + slot );
}
function setTexture3D( texture, slot ) {
const textureProperties = properties.get( texture );
if ( texture.version > 0 && textureProperties.__version !== texture.version ) {
uploadTexture( textureProperties, texture, slot );
return;
}
state.bindTexture( _gl.TEXTURE_3D, textureProperties.__webglTexture, _gl.TEXTURE0 + slot );
}
function setTextureCube( texture, slot ) {
const textureProperties = properties.get( texture );
if ( texture.version > 0 && textureProperties.__version !== texture.version ) {
uploadCubeTexture( textureProperties, texture, slot );
return;
}
state.bindTexture( _gl.TEXTURE_CUBE_MAP, textureProperties.__webglTexture, _gl.TEXTURE0 + slot );
}
const wrappingToGL = {
[ RepeatWrapping ]: _gl.REPEAT,
[ ClampToEdgeWrapping ]: _gl.CLAMP_TO_EDGE,
[ MirroredRepeatWrapping ]: _gl.MIRRORED_REPEAT
};
const filterToGL = {
[ NearestFilter ]: _gl.NEAREST,
[ NearestMipmapNearestFilter ]: _gl.NEAREST_MIPMAP_NEAREST,
[ NearestMipmapLinearFilter ]: _gl.NEAREST_MIPMAP_LINEAR,
[ LinearFilter ]: _gl.LINEAR,
[ LinearMipmapNearestFilter ]: _gl.LINEAR_MIPMAP_NEAREST,
[ LinearMipmapLinearFilter ]: _gl.LINEAR_MIPMAP_LINEAR
};
const compareToGL = {
[ NeverCompare ]: _gl.NEVER,
[ AlwaysCompare ]: _gl.ALWAYS,
[ LessCompare ]: _gl.LESS,
[ LessEqualCompare ]: _gl.LEQUAL,
[ EqualCompare ]: _gl.EQUAL,
[ GreaterEqualCompare ]: _gl.GEQUAL,
[ GreaterCompare ]: _gl.GREATER,
[ NotEqualCompare ]: _gl.NOTEQUAL
};
function setTextureParameters( textureType, texture ) {
if ( texture.type === FloatType && extensions.has( 'OES_texture_float_linear' ) === false &&
( texture.magFilter === LinearFilter || texture.magFilter === LinearMipmapNearestFilter || texture.magFilter === NearestMipmapLinearFilter || texture.magFilter === LinearMipmapLinearFilter ||
texture.minFilter === LinearFilter || texture.minFilter === LinearMipmapNearestFilter || texture.minFilter === NearestMipmapLinearFilter || texture.minFilter === LinearMipmapLinearFilter ) ) {
console.warn( 'THREE.WebGLRenderer: Unable to use linear filtering with floating point textures. OES_texture_float_linear not supported on this device.' );
}
_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_S, wrappingToGL[ texture.wrapS ] );
_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_T, wrappingToGL[ texture.wrapT ] );
if ( textureType === _gl.TEXTURE_3D || textureType === _gl.TEXTURE_2D_ARRAY ) {
_gl.texParameteri( textureType, _gl.TEXTURE_WRAP_R, wrappingToGL[ texture.wrapR ] );
}
_gl.texParameteri( textureType, _gl.TEXTURE_MAG_FILTER, filterToGL[ texture.magFilter ] );
_gl.texParameteri( textureType, _gl.TEXTURE_MIN_FILTER, filterToGL[ texture.minFilter ] );
if ( texture.compareFunction ) {
_gl.texParameteri( textureType, _gl.TEXTURE_COMPARE_MODE, _gl.COMPARE_REF_TO_TEXTURE );
_gl.texParameteri( textureType, _gl.TEXTURE_COMPARE_FUNC, compareToGL[ texture.compareFunction ] );
}
if ( extensions.has( 'EXT_texture_filter_anisotropic' ) === true ) {
if ( texture.magFilter === NearestFilter ) return;
if ( texture.minFilter !== NearestMipmapLinearFilter && texture.minFilter !== LinearMipmapLinearFilter ) return;
if ( texture.type === FloatType && extensions.has( 'OES_texture_float_linear' ) === false ) return; // verify extension
if ( texture.anisotropy > 1 || properties.get( texture ).__currentAnisotropy ) {
const extension = extensions.get( 'EXT_texture_filter_anisotropic' );
_gl.texParameterf( textureType, extension.TEXTURE_MAX_ANISOTROPY_EXT, Math.min( texture.anisotropy, capabilities.getMaxAnisotropy() ) );
properties.get( texture ).__currentAnisotropy = texture.anisotropy;
}
}
}
function initTexture( textureProperties, texture ) {
let forceUpload = false;
if ( textureProperties.__webglInit === undefined ) {
textureProperties.__webglInit = true;
texture.addEventListener( 'dispose', onTextureDispose );
}
// create Source <-> WebGLTextures mapping if necessary
const source = texture.source;
let webglTextures = _sources.get( source );
if ( webglTextures === undefined ) {
webglTextures = {};
_sources.set( source, webglTextures );
}
// check if there is already a WebGLTexture object for the given texture parameters
const textureCacheKey = getTextureCacheKey( texture );
if ( textureCacheKey !== textureProperties.__cacheKey ) {
// if not, create a new instance of WebGLTexture
if ( webglTextures[ textureCacheKey ] === undefined ) {
// create new entry
webglTextures[ textureCacheKey ] = {
texture: _gl.createTexture(),
usedTimes: 0
};
info.memory.textures ++;
// when a new instance of WebGLTexture was created, a texture upload is required
// even if the image contents are identical
forceUpload = true;
}
webglTextures[ textureCacheKey ].usedTimes ++;
// every time the texture cache key changes, it's necessary to check if an instance of
// WebGLTexture can be deleted in order to avoid a memory leak.
const webglTexture = webglTextures[ textureProperties.__cacheKey ];
if ( webglTexture !== undefined ) {
webglTextures[ textureProperties.__cacheKey ].usedTimes --;
if ( webglTexture.usedTimes === 0 ) {
deleteTexture( texture );
}
}
// store references to cache key and WebGLTexture object
textureProperties.__cacheKey = textureCacheKey;
textureProperties.__webglTexture = webglTextures[ textureCacheKey ].texture;
}
return forceUpload;
}
function uploadTexture( textureProperties, texture, slot ) {
let textureType = _gl.TEXTURE_2D;
if ( texture.isDataArrayTexture || texture.isCompressedArrayTexture ) textureType = _gl.TEXTURE_2D_ARRAY;
if ( texture.isData3DTexture ) textureType = _gl.TEXTURE_3D;
const forceUpload = initTexture( textureProperties, texture );
const source = texture.source;
state.bindTexture( textureType, textureProperties.__webglTexture, _gl.TEXTURE0 + slot );
const sourceProperties = properties.get( source );
if ( source.version !== sourceProperties.__version || forceUpload === true ) {
state.activeTexture( _gl.TEXTURE0 + slot );
const workingPrimaries = ColorManagement.getPrimaries( ColorManagement.workingColorSpace );
const texturePrimaries = texture.colorSpace === NoColorSpace ? null : ColorManagement.getPrimaries( texture.colorSpace );
const unpackConversion = texture.colorSpace === NoColorSpace || workingPrimaries === texturePrimaries ? _gl.NONE : _gl.BROWSER_DEFAULT_WEBGL;
_gl.pixelStorei( _gl.UNPACK_FLIP_Y_WEBGL, texture.flipY );
_gl.pixelStorei( _gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, texture.premultiplyAlpha );
_gl.pixelStorei( _gl.UNPACK_ALIGNMENT, texture.unpackAlignment );
_gl.pixelStorei( _gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, unpackConversion );
let image = resizeImage( texture.image, false, capabilities.maxTextureSize );
image = verifyColorSpace( texture, image );
const glFormat = utils.convert( texture.format, texture.colorSpace );
const glType = utils.convert( texture.type );
let glInternalFormat = getInternalFormat( texture.internalFormat, glFormat, glType, texture.colorSpace, texture.isVideoTexture );
setTextureParameters( textureType, texture );
let mipmap;
const mipmaps = texture.mipmaps;
const useTexStorage = ( texture.isVideoTexture !== true );
const allocateMemory = ( sourceProperties.__version === undefined ) || ( forceUpload === true );
const dataReady = source.dataReady;
const levels = getMipLevels( texture, image );
if ( texture.isDepthTexture ) {
glInternalFormat = getInternalDepthFormat( texture.format === DepthStencilFormat, texture.type );
//
if ( allocateMemory ) {
if ( useTexStorage ) {
state.texStorage2D( _gl.TEXTURE_2D, 1, glInternalFormat, image.width, image.height );
} else {
state.texImage2D( _gl.TEXTURE_2D, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, null );
}
}
} else if ( texture.isDataTexture ) {
// use manually created mipmaps if available
// if there are no manual mipmaps
// set 0 level mipmap and then use GL to generate other mipmap levels
if ( mipmaps.length > 0 ) {
if ( useTexStorage && allocateMemory ) {
state.texStorage2D( _gl.TEXTURE_2D, levels, glInternalFormat, mipmaps[ 0 ].width, mipmaps[ 0 ].height );
}
for ( let i = 0, il = mipmaps.length; i < il; i ++ ) {
mipmap = mipmaps[ i ];
if ( useTexStorage ) {
if ( dataReady ) {
state.texSubImage2D( _gl.TEXTURE_2D, i, 0, 0, mipmap.width, mipmap.height, glFormat, glType, mipmap.data );
}
} else {
state.texImage2D( _gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );
}
}
texture.generateMipmaps = false;
} else {
if ( useTexStorage ) {
if ( allocateMemory ) {
state.texStorage2D( _gl.TEXTURE_2D, levels, glInternalFormat, image.width, image.height );
}
if ( dataReady ) {
state.texSubImage2D( _gl.TEXTURE_2D, 0, 0, 0, image.width, image.height, glFormat, glType, image.data );
}
} else {
state.texImage2D( _gl.TEXTURE_2D, 0, glInternalFormat, image.width, image.height, 0, glFormat, glType, image.data );
}
}
} else if ( texture.isCompressedTexture ) {
if ( texture.isCompressedArrayTexture ) {
if ( useTexStorage && allocateMemory ) {
state.texStorage3D( _gl.TEXTURE_2D_ARRAY, levels, glInternalFormat, mipmaps[ 0 ].width, mipmaps[ 0 ].height, image.depth );
}
for ( let i = 0, il = mipmaps.length; i < il; i ++ ) {
mipmap = mipmaps[ i ];
if ( texture.format !== RGBAFormat ) {
if ( glFormat !== null ) {
if ( useTexStorage ) {
if ( dataReady ) {
if ( texture.layerUpdates.size > 0 ) {
const layerByteLength = getByteLength( mipmap.width, mipmap.height, texture.format, texture.type );
for ( const layerIndex of texture.layerUpdates ) {
const layerData = mipmap.data.subarray(
layerIndex * layerByteLength / mipmap.data.BYTES_PER_ELEMENT,
( layerIndex + 1 ) * layerByteLength / mipmap.data.BYTES_PER_ELEMENT
);
state.compressedTexSubImage3D( _gl.TEXTURE_2D_ARRAY, i, 0, 0, layerIndex, mipmap.width, mipmap.height, 1, glFormat, layerData );
}
texture.clearLayerUpdates();
} else {
state.compressedTexSubImage3D( _gl.TEXTURE_2D_ARRAY, i, 0, 0, 0, mipmap.width, mipmap.height, image.depth, glFormat, mipmap.data );
}
}
} else {
state.compressedTexImage3D( _gl.TEXTURE_2D_ARRAY, i, glInternalFormat, mipmap.width, mipmap.height, image.depth, 0, mipmap.data, 0, 0 );
}
} else {
console.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()' );
}
} else {
if ( useTexStorage ) {
if ( dataReady ) {
state.texSubImage3D( _gl.TEXTURE_2D_ARRAY, i, 0, 0, 0, mipmap.width, mipmap.height, image.depth, glFormat, glType, mipmap.data );
}
} else {
state.texImage3D( _gl.TEXTURE_2D_ARRAY, i, glInternalFormat, mipmap.width, mipmap.height, image.depth, 0, glFormat, glType, mipmap.data );
}
}
}
} else {
if ( useTexStorage && allocateMemory ) {
state.texStorage2D( _gl.TEXTURE_2D, levels, glInternalFormat, mipmaps[ 0 ].width, mipmaps[ 0 ].height );
}
for ( let i = 0, il = mipmaps.length; i < il; i ++ ) {
mipmap = mipmaps[ i ];
if ( texture.format !== RGBAFormat ) {
if ( glFormat !== null ) {
if ( useTexStorage ) {
if ( dataReady ) {
state.compressedTexSubImage2D( _gl.TEXTURE_2D, i, 0, 0, mipmap.width, mipmap.height, glFormat, mipmap.data );
}
} else {
state.compressedTexImage2D( _gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, mipmap.data );
}
} else {
console.warn( 'THREE.WebGLRenderer: Attempt to load unsupported compressed texture format in .uploadTexture()' );
}
} else {
if ( useTexStorage ) {
if ( dataReady ) {
state.texSubImage2D( _gl.TEXTURE_2D, i, 0, 0, mipmap.width, mipmap.height, glFormat, glType, mipmap.data );
}
} else {
state.texImage2D( _gl.TEXTURE_2D, i, glInternalFormat, mipmap.width, mipmap.height, 0, glFormat, glType, mipmap.data );
}
}
}