mirror of https://github.com/axmolengine/axmol.git
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
#include "Texture.h"
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#include <cassert>
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CC_BACKEND_BEGIN
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#define byte(n) ((n) * 8)
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#define bit(n) (n)
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namespace
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{
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uint8_t computeBitsPerElement(TextureFormat textureFormat)
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{
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switch (textureFormat)
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{
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case TextureFormat::R8G8B8A8:
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return byte(4);
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case TextureFormat::R8G8B8:
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return byte(3);
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case TextureFormat::RGBA4444:
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return byte(2);
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case TextureFormat::A8:
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return byte(1);
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case TextureFormat::I8:
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return byte(1);
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case TextureFormat::RGB565:
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return byte(2);
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case TextureFormat::RGB5A1:
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return byte(2);
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case TextureFormat::AI88:
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return byte(2);
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case TextureFormat::ETC1:
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return bit(4);
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case TextureFormat::ATC_RGB:
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return bit(4);
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case TextureFormat::ATC_EXPLICIT_ALPHA:
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return byte(1);
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case TextureFormat::ATC_INTERPOLATED_ALPHA:
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return byte(1);
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case TextureFormat::PVRTC2:
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return bit(2);
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case TextureFormat::PVRTC2A:
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return bit(2);
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case TextureFormat::PVRTC4:
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return bit(4);
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case TextureFormat::PVRTC4A:
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return bit(4);
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case TextureFormat::S3TC_DXT1:
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return bit(4);
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case TextureFormat::S3TC_DXT3:
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return byte(1);
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case TextureFormat::S3TC_DXT5:
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return byte(1);
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case TextureFormat::MTL_BGR5A1:
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return byte(2);
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case TextureFormat::MTL_B5G6R5:
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return byte(2);
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case TextureFormat::MTL_ABGR4:
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return byte(2);
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default:
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assert(false); //"textureFormat pixel size in bytes not defined!";
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break;
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}
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return 0;
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}
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}
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Texture::Texture(const TextureDescriptor& descriptor)
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: _width(descriptor.width)
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, _height(descriptor.height)
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, _textureType(descriptor.textureType)
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, _textureFormat(descriptor.textureFormat)
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, _bitsPerElement(computeBitsPerElement(descriptor.textureFormat))
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, _isMipmapEnabled(descriptor.samplerDescriptor.mipmapEnabled)
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, _textureUsage(descriptor.textureUsage)
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, _isCompressed(descriptor.compressed)
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{
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}
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Texture::~Texture()
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{}
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CC_BACKEND_END
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