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PVRParser.js
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PVRParser.js
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/**
* @author Richard Davey <rich@phaser.io>
* @copyright 2021 Photon Storm Ltd.
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
/**
* @ignore
*/
function GetSize (width, height, x, y, dx, dy, mult)
{
if (mult === undefined) { mult = 16; }
return Math.floor((width + x) / dx) * Math.floor((height + y) / dy) * mult;
}
/**
* @ignore
*/
function PVRTC2bppSize (width, height)
{
width = Math.max(width, 16);
height = Math.max(height, 8);
return width * height / 4;
}
/**
* @ignore
*/
function PVRTC4bppSize (width, height)
{
width = Math.max(width, 8);
height = Math.max(height, 8);
return width * height / 2;
}
/**
* @ignore
*/
function BPTCSize (width, height)
{
return Math.ceil(width / 4) * Math.ceil(height / 4) * 16;
}
/**
* @ignore
*/
function DXTEtcSmallSize (width, height)
{
return GetSize(width, height, 3, 3, 4, 4, 8);
}
/**
* @ignore
*/
function DXTEtcAstcBigSize (width, height)
{
return GetSize(width, height, 3, 3, 4, 4);
}
/**
* @ignore
*/
function ATC5x4Size (width, height)
{
return GetSize(width, height, 4, 3, 5, 4);
}
/**
* @ignore
*/
function ATC5x5Size (width, height)
{
return GetSize(width, height, 4, 4, 5, 5);
}
/**
* @ignore
*/
function ATC6x5Size (width, height)
{
return GetSize(width, height, 5, 4, 6, 5);
}
/**
* @ignore
*/
function ATC6x6Size (width, height)
{
return GetSize(width, height, 5, 5, 6, 6);
}
/**
* @ignore
*/
function ATC8x5Size (width, height)
{
return GetSize(width, height, 7, 4, 8, 5);
}
/**
* @ignore
*/
function ATC8x6Size (width, height)
{
return GetSize(width, height, 7, 5, 8, 6);
}
/**
* @ignore
*/
function ATC8x8Size (width, height)
{
return GetSize(width, height, 7, 7, 8, 8);
}
/**
* @ignore
*/
function ATC10x5Size (width, height)
{
return GetSize(width, height, 9, 4, 10, 5);
}
/**
* @ignore
*/
function ATC10x6Size (width, height)
{
return GetSize(width, height, 9, 5, 10, 6);
}
/**
* @ignore
*/
function ATC10x8Size (width, height)
{
return GetSize(width, height, 9, 7, 10, 8);
}
/**
* @ignore
*/
function ATC10x10Size (width, height)
{
return GetSize(width, height, 9, 9, 10, 10);
}
/**
* @ignore
*/
function ATC12x10Size (width, height)
{
return GetSize(width, height, 11, 9, 12, 10);
}
/**
* @ignore
*/
function ATC12x12Size (width, height)
{
return GetSize(width, height, 11, 11, 12, 12);
}
/*
* 0: COMPRESSED_RGB_PVRTC_2BPPV1_IMG
* 1: COMPRESSED_RGBA_PVRTC_2BPPV1_IMG
* 2: COMPRESSED_RGB_PVRTC_4BPPV1_IMG
* 3: COMPRESSED_RGBA_PVRTC_4BPPV1_IMG
* 6: COMPRESSED_RGB_ETC1
* 7: COMPRESSED_RGB_S3TC_DXT1_EXT or COMPRESSED_SRGB_S3TC_DXT1_EXT
* 8: COMPRESSED_RGBA_S3TC_DXT1_EXT or COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
* 9: COMPRESSED_RGBA_S3TC_DXT3_EXT or COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
* 11: COMPRESSED_RGBA_S3TC_DXT5_EXT or COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
* 14: COMPRESSED_RGB_BPTC_SIGNED_FLOAT_EXT or COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT_EXT
* 15: COMPRESSED_RGBA_BPTC_UNORM_EXT or COMPRESSED_SRGB_ALPHA_BPTC_UNORM_EXT
* 22: COMPRESSED_RGB8_ETC2 or COMPRESSED_SRGB8_ETC2
* 23: COMPRESSED_RGBA8_ETC2_EAC or COMPRESSED_SRGB8_ALPHA8_ETC2_EAC
* 24: COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2 or COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2
* 25: COMPRESSED_R11_EAC
* 26: COMPRESSED_RG11_EAC
* 27: COMPRESSED_RGBA_ASTC_4x4_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_4X4_KHR
* 28: COMPRESSED_RGBA_ASTC_5x4_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_5X4_KHR
* 29: COMPRESSED_RGBA_ASTC_5x5_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_5X5_KHR
* 30: COMPRESSED_RGBA_ASTC_6x5_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_6X5_KHR
* 31: COMPRESSED_RGBA_ASTC_6x6_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_6X6_KHR
* 32: COMPRESSED_RGBA_ASTC_8x5_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_8X5_KHR
* 33: COMPRESSED_RGBA_ASTC_8x6_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_8X6_KHR
* 34: COMPRESSED_RGBA_ASTC_8x8_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_8X8_KHR
* 35: COMPRESSED_RGBA_ASTC_10x5_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_10X5_KHR
* 36: COMPRESSED_RGBA_ASTC_10x6_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_10X6_KHR
* 37: COMPRESSED_RGBA_ASTC_10x8_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_10X8_KHR
* 38: COMPRESSED_RGBA_ASTC_10x10_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_10X10_KHR
* 39: COMPRESSED_RGBA_ASTC_12x10_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_12X10_KHR
* 40: COMPRESSED_RGBA_ASTC_12x12_KHR or COMPRESSED_SRGB8_ALPHA8_ASTC_12X12_KHR
*/
/**
* @ignore
*/
var FORMATS = {
0: { sizeFunc: PVRTC2bppSize, glFormat: [ 0x8C01 ] },
1: { sizeFunc: PVRTC2bppSize, glFormat: [ 0x8C03 ] },
2: { sizeFunc: PVRTC4bppSize, glFormat: [ 0x8C00 ] },
3: { sizeFunc: PVRTC4bppSize, glFormat: [ 0x8C02 ] },
6: { sizeFunc: DXTEtcSmallSize , glFormat: [ 0x8D64 ] },
7: { sizeFunc: DXTEtcSmallSize, glFormat: [ 0x83F0, 0x8C4C ] },
8: { sizeFunc: DXTEtcAstcBigSize, glFormat: [ 0x83F1, 0x8C4D ] },
9: { sizeFunc: DXTEtcAstcBigSize, glFormat: [ 0x83F2, 0x8C4E ] },
11: { sizeFunc: DXTEtcAstcBigSize, glFormat: [ 0x83F3, 0x8C4F ] },
14: { sizeFunc: BPTCSize, glFormat: [ 0x8E8E, 0x8E8F ] },
15: { sizeFunc: BPTCSize, glFormat: [ 0x8E8C, 0x8E8D ] },
22: { sizeFunc: DXTEtcSmallSize , glFormat: [ 0x9274, 0x9275 ] },
23: { sizeFunc: DXTEtcAstcBigSize, glFormat: [ 0x9278, 0x9279 ] },
24: { sizeFunc: DXTEtcSmallSize, glFormat: [ 0x9276, 0x9277 ] },
25: { sizeFunc: DXTEtcSmallSize, glFormat: [ 0x9270 ] },
26: { sizeFunc: DXTEtcAstcBigSize, glFormat: [ 0x9272 ] },
27: { sizeFunc: DXTEtcAstcBigSize, glFormat: [ 0x93B0, 0x93D0 ] },
28: { sizeFunc: ATC5x4Size, glFormat: [ 0x93B1, 0x93D1 ] },
29: { sizeFunc: ATC5x5Size, glFormat: [ 0x93B2, 0x93D2 ] },
30: { sizeFunc: ATC6x5Size, glFormat: [ 0x93B3, 0x93D3 ] },
31: { sizeFunc: ATC6x6Size, glFormat: [ 0x93B4, 0x93D4 ] },
32: { sizeFunc: ATC8x5Size, glFormat: [ 0x93B5, 0x93D5 ] },
33: { sizeFunc: ATC8x6Size, glFormat: [ 0x93B6, 0x93D6 ] },
34: { sizeFunc: ATC8x8Size, glFormat: [ 0x93B7, 0x93D7 ] },
35: { sizeFunc: ATC10x5Size, glFormat: [ 0x93B8, 0x93D8 ] },
36: { sizeFunc: ATC10x6Size, glFormat: [ 0x93B9, 0x93D9 ] },
37: { sizeFunc: ATC10x8Size, glFormat: [ 0x93BA, 0x93DA ] },
38: { sizeFunc: ATC10x10Size, glFormat: [ 0x93BB, 0x93DB ] },
39: { sizeFunc: ATC12x10Size, glFormat: [ 0x93BC, 0x93DC ] },
40: { sizeFunc: ATC12x12Size, glFormat: [ 0x93BD, 0x93DD ] }
};
/**
* Parses a PVR format Compressed Texture file and generates texture data suitable for WebGL from it.
*
* @function Phaser.Textures.Parsers.PVRParser
* @memberof Phaser.Textures.Parsers
* @since 3.60.0
*
* @param {ArrayBuffer} data - The data object created by the Compressed Texture File Loader.
*
* @return {Phaser.Types.Textures.CompressedTextureData} The Compressed Texture data.
*/
var PVRParser = function (data)
{
var header = new Uint32Array(data, 0, 13);
// VERSION
var version = header[0];
var versionMatch = version === 0x03525650;
// PIXEL_FORMAT_INDEX
var pvrFormat = versionMatch ? header[2] : header[3];
// Colour Space
var colorSpace = header[4];
var internalFormat = FORMATS[pvrFormat].glFormat[colorSpace];
var sizeFunction = FORMATS[pvrFormat].sizeFunc;
// MIPMAPCOUNT_INDEX
var mipmapLevels = header[11];
// WIDTH_INDEX
var width = header[7];
// HEIGHT_INDEX
var height = header[6];
// HEADER_SIZE + METADATA_SIZE_INDEX
var dataOffset = 52 + header[12];
var image = new Uint8Array(data, dataOffset);
var mipmaps = new Array(mipmapLevels);
var offset = 0;
var levelWidth = width;
var levelHeight = height;
for (var i = 0; i < mipmapLevels; i++)
{
var levelSize = sizeFunction(levelWidth, levelHeight);
mipmaps[i] = {
data: new Uint8Array(image.buffer, image.byteOffset + offset, levelSize),
width: levelWidth,
height: levelHeight
};
levelWidth = Math.max(1, levelWidth >> 1);
levelHeight = Math.max(1, levelHeight >> 1);
offset += levelSize;
}
return {
mipmaps: mipmaps,
width: width,
height: height,
internalFormat: internalFormat,
compressed: true,
generateMipmap: false
};
};
module.exports = PVRParser;