279 lines
10 KiB
C++
Executable File
279 lines
10 KiB
C++
Executable File
//
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// KRTextureKTX.cpp
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// KREngine
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//
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// Copyright 2012 Kearwood Gilbert. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other materials
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// provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY KEARWOOD GILBERT ''AS IS'' AND ANY EXPRESS OR IMPLIED
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// WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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// FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL KEARWOOD GILBERT OR
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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// ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// The views and conclusions contained in the software and documentation are those of the
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// authors and should not be interpreted as representing official policies, either expressed
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// or implied, of Kearwood Gilbert.
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//
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#include "KRTextureKTX.h"
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#include "KRTextureManager.h"
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#include "KREngine-common.h"
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__uint8_t _KTXFileIdentifier[12] = {
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0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A
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};
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KRTextureKTX::KRTextureKTX(KRContext &context, KRDataBlock *data, std::string name) : KRTexture2D(context, data, name) {
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m_pData->copy(&m_header, 0, sizeof(KTXHeader));
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if(memcmp(_KTXFileIdentifier, m_header.identifier, 12) != 0) {
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assert(false); // Header not recognized
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}
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if(m_header.endianness != 0x04030201) {
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assert(false); // Endianness not (yet) supported
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}
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if(m_header.pixelDepth != 0) {
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assert(false); // 3d textures not (yet) supported
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}
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if(m_header.numberOfArrayElements != 0) {
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assert(false); // Array textures not (yet) supported
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}
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if(m_header.numberOfFaces != 1) {
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assert(false); // Cube-map textures are only supported as a file for each separate face (for now)
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}
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uint32_t blockStart = sizeof(KTXHeader) + m_header.bytesOfKeyValueData;
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uint32_t width = m_header.pixelWidth, height = m_header.pixelHeight;
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for(int mipmap_level=0; mipmap_level < KRMAX(m_header.numberOfMipmapLevels, 1); mipmap_level++) {
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uint32_t blockLength;
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data->copy(&blockLength, blockStart, 4);
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blockStart += 4;
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m_blocks.push_back(m_pData->getSubBlock(blockStart, blockLength));
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blockStart += blockLength;
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blockStart = KRALIGN(blockStart);
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width = width >> 1;
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if(width < 1) {
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width = 1;
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}
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height = height >> 1;
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if(height < 1) {
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height = 1;
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}
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}
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m_max_lod_max_dim = KRMAX(m_header.pixelWidth, m_header.pixelHeight);
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m_min_lod_max_dim = KRMAX(width, height);
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}
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KRTextureKTX::KRTextureKTX(KRContext &context, std::string name, GLenum internal_format, GLenum base_internal_format, int width, int height, const std::list<KRDataBlock *> &blocks) : KRTexture2D(context, new KRDataBlock(), name)
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{
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memcpy(m_header.identifier, _KTXFileIdentifier, 12);
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m_header.endianness = 0x04030201;
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m_header.glType = 0;
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m_header.glTypeSize = 1;
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m_header.glFormat = 0;
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m_header.glInternalFormat = internal_format;
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m_header.glBaseInternalFormat = base_internal_format;
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m_header.pixelWidth = width;
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m_header.pixelHeight = height;
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m_header.pixelDepth = 0;
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m_header.numberOfArrayElements = 0;
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m_header.numberOfFaces = 1;
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m_header.numberOfMipmapLevels = (__uint32_t)blocks.size();
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m_header.bytesOfKeyValueData = 0;
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m_pData->append(&m_header, sizeof(m_header));
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for(auto block_itr = blocks.begin(); block_itr != blocks.end(); block_itr++) {
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KRDataBlock *source_block = *block_itr;
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__uint32_t block_size = (__uint32_t)source_block->getSize();
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m_pData->append(&block_size, 4);
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m_pData->append(*source_block);
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m_blocks.push_back(m_pData->getSubBlock((int)m_pData->getSize() - (int)block_size, (int)block_size));
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size_t alignment_padding_size = KRALIGN(m_pData->getSize()) - m_pData->getSize();
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__uint8_t alignment_padding[4] = {0, 0, 0, 0};
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if(alignment_padding_size > 0) {
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m_pData->append(&alignment_padding, alignment_padding_size);
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}
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}
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}
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KRTextureKTX::~KRTextureKTX() {
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for(std::list<KRDataBlock *>::iterator itr = m_blocks.begin(); itr != m_blocks.end(); itr++) {
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KRDataBlock *block = *itr;
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delete block;
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}
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m_blocks.clear();
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}
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long KRTextureKTX::getMemRequiredForSize(int max_dim)
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{
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int target_dim = max_dim;
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if(target_dim < m_min_lod_max_dim) target_dim = target_dim;
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// Determine how much memory will be consumed
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int width = m_header.pixelWidth;
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int height = m_header.pixelHeight;
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long memoryRequired = 0;
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for(std::list<KRDataBlock *>::iterator itr = m_blocks.begin(); itr != m_blocks.end(); itr++) {
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KRDataBlock *block = *itr;
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if(width <= target_dim && height <= target_dim) {
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memoryRequired += block->getSize();
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}
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width = width >> 1;
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if(width < 1) {
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width = 1;
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}
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height = height >> 1;
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if(height < 1) {
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height = 1;
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}
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}
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return memoryRequired;
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}
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bool KRTextureKTX::uploadTexture(GLenum target, int lod_max_dim, int ¤t_lod_max_dim, bool compress, bool premultiply_alpha)
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{
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int target_dim = lod_max_dim;
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if(target_dim < m_min_lod_max_dim) target_dim = m_min_lod_max_dim;
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if(m_blocks.size() == 0) {
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return false;
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}
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// Determine how much memory will be consumed
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int width = m_header.pixelWidth;
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int height = m_header.pixelHeight;
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long memoryRequired = 0;
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long memoryTransferred = 0;
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#if GL_EXT_texture_storage
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if(target == GL_TEXTURE_CUBE_MAP_POSITIVE_X || target == GL_TEXTURE_2D) {
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// Call glTexStorage2DEXT only for the first uploadTexture used when creating a texture
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int level_count=0;
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int max_lod_width=0;
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int max_lod_height=0;
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for(std::list<KRDataBlock *>::iterator itr = m_blocks.begin(); itr != m_blocks.end(); itr++) {
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if(width <= target_dim && height <= target_dim) {
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if(max_lod_width == 0) {
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max_lod_width = width;
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max_lod_height = height;
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}
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level_count++;
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}
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width = width >> 1;
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if(width < 1) {
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width = 1;
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}
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height = height >> 1;
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if(height < 1) {
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height = 1;
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}
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}
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width = m_header.pixelWidth;
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height = m_header.pixelHeight;
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if(target == GL_TEXTURE_CUBE_MAP_POSITIVE_X) {
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glTexStorage2DEXT(GL_TEXTURE_CUBE_MAP, level_count, (GLenum)m_header.glInternalFormat, max_lod_width, max_lod_height);
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} else if(target == GL_TEXTURE_2D) {
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glTexStorage2DEXT(target, level_count, (GLenum)m_header.glInternalFormat, max_lod_width, max_lod_height);
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}
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}
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#endif
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// Upload texture data
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int destination_level=0;
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int source_level = 0;
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for(std::list<KRDataBlock *>::iterator itr = m_blocks.begin(); itr != m_blocks.end(); itr++) {
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KRDataBlock *block = *itr;
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if(width <= target_dim && height <= target_dim) {
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if(width > current_lod_max_dim) {
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current_lod_max_dim = width;
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}
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if(height > current_lod_max_dim) {
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current_lod_max_dim = height;
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}
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#if GL_APPLE_copy_texture_levels && GL_EXT_texture_storage
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if(target == GL_TEXTURE_2D && width <= m_current_lod_max_dim && height <= m_current_lod_max_dim) {
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//GLDEBUG(glCompressedTexImage2D(target, i, (GLenum)m_header.glInternalFormat, width, height, 0, block.length, NULL)); // Allocate, but don't copy
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// GLDEBUG(glTexImage2D(target, 0, GL_RGBA, width, height, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL));
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GLDEBUG(glCopyTextureLevelsAPPLE(m_iNewHandle, m_iHandle, source_level, 1));
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} else {
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block->lock();
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GLDEBUG(glCompressedTexSubImage2D(target, destination_level, 0, 0, width, height, (GLenum)m_header.glInternalFormat, (GLsizei)block->getSize(), block->getStart()));
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block->unlock();
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memoryTransferred += block->getSize(); // memoryTransferred does not include throughput of mipmap levels copied through glCopyTextureLevelsAPPLE
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}
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#else
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block->lock();
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#if GL_EXT_texture_storage
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GLDEBUG(glCompressedTexSubImage2D(target, destination_level, 0, 0, width, height, (GLenum)m_header.glInternalFormat, (GLsizei)block->getSize(), block->getStart()));
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#else
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GLDEBUG(glCompressedTexImage2D(target, destination_level, (GLenum)m_header.glInternalFormat, width, height, 0, (GLsizei)block->getSize(), block->getStart()));
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#endif
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block->unlock();
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memoryTransferred += block->getSize(); // memoryTransferred does not include throughput of mipmap levels copied through glCopyTextureLevelsAPPLE
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#endif
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memoryRequired += block->getSize();
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//
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// err = glGetError();
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// if (err != GL_NO_ERROR) {
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// assert(false);
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// return false;
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// }
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//
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destination_level++;
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}
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if(width <= m_current_lod_max_dim && height <= m_current_lod_max_dim) {
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source_level++;
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}
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width = width >> 1;
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if(width < 1) {
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width = 1;
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}
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height = height >> 1;
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if(height < 1) {
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height = 1;
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}
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}
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return true;
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}
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std::string KRTextureKTX::getExtension()
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{
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return "ktx";
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}
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