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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Contributor(s): none yet.
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file blender/imbuf/intern/ktx.c
* \ingroup imbuf
*/
#include "ktx.h"
#include "IMB_imbuf.h"
#include "IMB_imbuf_types.h"
#include "IMB_filetype.h"
#include "BLI_utildefines.h"
#include "BLI_path_util.h"
#include "BLI_sys_types.h"
#include <string.h>
#include <stdlib.h>
static char KTX_HEAD[] = {0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A};
bool check_ktx(const unsigned char *mem, size_t size)
{
return memcmp(KTX_HEAD, mem, sizeof(KTX_HEAD)) == 0;
}
struct ImBuf *imb_loadktx(const unsigned char *mem, size_t size, int flags, char * UNUSED(colorspace))
{
ktxTexture *tex;
KTX_error_code ktxerror = ktxTexture_CreateFromMemory(mem, size, 0, &tex);
if (ktxerror != KTX_SUCCESS) {
return NULL;
}
ktx_size_t offset;
ktxerror = ktxTexture_GetImageOffset(tex, 0, 0, 0, &offset);
if (ktxerror != KTX_SUCCESS) {
ktxTexture_Destroy(tex);
return NULL;
}
ktx_uint8_t *image = ktxTexture_GetData(tex) + offset;
ktx_uint32_t xsize = tex->baseWidth;
ktx_uint32_t ysize = tex->baseHeight;
ImBuf *ibuf = IMB_allocImBuf(xsize, ysize, 32, (int)IB_rect);
bool flipx = false, flipy = false;
for (ktx_uint32_t i = 0; i < xsize + ysize; ++i)
ibuf->rect[i] = image[i];
char *pValue;
uint32_t valueLen;
ktxerror = ktxHashList_FindValue(&tex->kvDataHead, KTX_ORIENTATION_KEY, &valueLen, (void **)&pValue);
if (ktxerror != KTX_SUCCESS) {
char cx, cy;
if (sscanf(pValue, KTX_ORIENTATION2_FMT, &cx, &cy) == 2) {
flipx = (cx == 'd');
flipy = (cy == 'd');
}
}
if (flipx && flipy) {
int i;
size_t imbuf_size = ibuf->x * ibuf->y;
for (i = 0; i < imbuf_size / 2; i++) {
SWAP(unsigned int, ibuf->rect[i], ibuf->rect[imbuf_size - i - 1]);
}
}
else if (flipy) {
size_t i, j;
for (j = 0; j < ibuf->y / 2; j++) {
for (i = 0; i < ibuf->x; i++) {
SWAP(unsigned int,
ibuf->rect[i + j * ibuf->x],
ibuf->rect[i + (ibuf->y - j - 1) * ibuf->x]);
}
}
}
ktxTexture_Destroy(tex);
return ibuf;
}
bool imb_savektx(struct ImBuf *ibuf, const char *name, int UNUSED(flags))
{
ktxTextureCreateInfo createInfo;
createInfo.glInternalformat = 0x8058; // GL_RGBA8
createInfo.baseWidth = ibuf->x;
createInfo.baseHeight = ibuf->y;
createInfo.baseDepth = 0;
createInfo.numDimensions = 2;
// Note: it is not necessary to provide a full mipmap pyramid.
createInfo.numLevels = 1;
createInfo.numLayers = 1;
createInfo.numFaces = 1;
createInfo.isArray = KTX_FALSE;
createInfo.generateMipmaps = KTX_FALSE;
KTX_error_code result;
ktxTexture2 *tex;
result = ktxTexture2_Create(&createInfo, KTX_TEXTURE_CREATE_ALLOC_STORAGE, &tex);
if (KTX_SUCCESS != result) {
return false;
}
ktxTexture *texture = ktxTexture(tex);
ktx_uint32_t level, layer, faceSlice;
level = 0;
layer = 0;
faceSlice = 0;
result = ktxTexture_SetImageFromMemory(
texture, level, layer, faceSlice, (ktx_uint8_t*)ibuf->rect, (size_t)ibuf->x * (size_t)ibuf->y * (size_t) 4);
if (KTX_SUCCESS != result) {
ktxTexture_Destroy(texture);
return false;
}
result = ktxTexture_WriteToNamedFile(texture, name);
ktxTexture_Destroy(texture);
return KTX_SUCCESS == result;
}
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