1/**************************************************************************/
2/* texture_loader_ktx.cpp */
3/**************************************************************************/
4/* This file is part of: */
5/* GODOT ENGINE */
6/* https://godotengine.org */
7/**************************************************************************/
8/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
9/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
10/* */
11/* Permission is hereby granted, free of charge, to any person obtaining */
12/* a copy of this software and associated documentation files (the */
13/* "Software"), to deal in the Software without restriction, including */
14/* without limitation the rights to use, copy, modify, merge, publish, */
15/* distribute, sublicense, and/or sell copies of the Software, and to */
16/* permit persons to whom the Software is furnished to do so, subject to */
17/* the following conditions: */
18/* */
19/* The above copyright notice and this permission notice shall be */
20/* included in all copies or substantial portions of the Software. */
21/* */
22/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
23/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
24/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
25/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
26/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
27/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
28/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
29/**************************************************************************/
30
31#include "texture_loader_ktx.h"
32
33#include "core/io/file_access.h"
34#include "core/io/file_access_memory.h"
35#include "scene/resources/image_texture.h"
36
37#include <ktx.h>
38#include <vk_format.h>
39
40KTX_error_code ktx_read(ktxStream *stream, void *dst, const ktx_size_t count) {
41 Ref<FileAccess> *f = reinterpret_cast<Ref<FileAccess> *>(stream->data.custom_ptr.address);
42 (*f)->get_buffer(reinterpret_cast<uint8_t *>(dst), count);
43 return KTX_SUCCESS;
44}
45
46KTX_error_code ktx_skip(ktxStream *stream, const ktx_size_t count) {
47 Ref<FileAccess> *f = reinterpret_cast<Ref<FileAccess> *>(stream->data.custom_ptr.address);
48 for (ktx_size_t i = 0; i < count; ++i) {
49 (*f)->get_8();
50 }
51 return KTX_SUCCESS;
52}
53
54KTX_error_code ktx_write(ktxStream *stream, const void *src, const ktx_size_t size, const ktx_size_t count) {
55 Ref<FileAccess> *f = reinterpret_cast<Ref<FileAccess> *>(stream->data.custom_ptr.address);
56 (*f)->store_buffer(reinterpret_cast<const uint8_t *>(src), size * count);
57 return KTX_SUCCESS;
58}
59
60KTX_error_code ktx_getpos(ktxStream *stream, ktx_off_t *const offset) {
61 Ref<FileAccess> *f = reinterpret_cast<Ref<FileAccess> *>(stream->data.custom_ptr.address);
62 *offset = (*f)->get_position();
63 return KTX_SUCCESS;
64}
65
66KTX_error_code ktx_setpos(ktxStream *stream, const ktx_off_t offset) {
67 Ref<FileAccess> *f = reinterpret_cast<Ref<FileAccess> *>(stream->data.custom_ptr.address);
68 (*f)->seek(offset);
69 return KTX_SUCCESS;
70}
71
72KTX_error_code ktx_getsize(ktxStream *stream, ktx_size_t *const size) {
73 Ref<FileAccess> *f = reinterpret_cast<Ref<FileAccess> *>(stream->data.custom_ptr.address);
74 *size = (*f)->get_length();
75 return KTX_SUCCESS;
76}
77
78void ktx_destruct(ktxStream *stream) {
79 (void)stream;
80}
81
82static Ref<Image> load_from_file_access(Ref<FileAccess> f, Error *r_error) {
83 ktxStream ktx_stream;
84 ktx_stream.read = ktx_read;
85 ktx_stream.skip = ktx_skip;
86 ktx_stream.write = ktx_write;
87 ktx_stream.getpos = ktx_getpos;
88 ktx_stream.setpos = ktx_setpos;
89 ktx_stream.getsize = ktx_getsize;
90 ktx_stream.destruct = ktx_destruct;
91 ktx_stream.type = eStreamTypeCustom;
92 ktx_stream.data.custom_ptr.address = &f;
93 ktx_stream.data.custom_ptr.allocatorAddress = NULL;
94 ktx_stream.data.custom_ptr.size = 0;
95 ktx_stream.readpos = 0;
96 ktx_stream.closeOnDestruct = false;
97 ktxTexture *ktx_texture;
98 KTX_error_code result = ktxTexture_CreateFromStream(&ktx_stream,
99 KTX_TEXTURE_CREATE_LOAD_IMAGE_DATA_BIT,
100 &ktx_texture);
101 if (result != KTX_SUCCESS) {
102 ERR_FAIL_V_MSG(Ref<Resource>(), "Invalid or unsupported KTX texture file.");
103 }
104
105 if (ktx_texture->numDimensions != 2) {
106 ktxTexture_Destroy(ktx_texture);
107 ERR_FAIL_V_MSG(Ref<Resource>(), "Unsupported non-2D KTX texture file.");
108 }
109
110 if (ktx_texture->isCubemap || ktx_texture->numFaces != 1) {
111 ktxTexture_Destroy(ktx_texture);
112 ERR_FAIL_V_MSG(Ref<Resource>(), "Unsupported cube map KTX texture file.");
113 }
114
115 if (ktx_texture->isArray) {
116 ktxTexture_Destroy(ktx_texture);
117 ERR_FAIL_V_MSG(Ref<Resource>(), "Unsupported array KTX texture file.");
118 }
119
120 uint32_t width = ktx_texture->baseWidth;
121 uint32_t height = ktx_texture->baseHeight;
122 uint32_t mipmaps = ktx_texture->numLevels;
123 Image::Format format;
124 bool srgb = false;
125
126 switch (ktx_texture->classId) {
127 case ktxTexture1_c:
128 switch (((ktxTexture1 *)ktx_texture)->glInternalformat) {
129 case GL_LUMINANCE:
130 format = Image::FORMAT_L8;
131 break;
132 case GL_LUMINANCE_ALPHA:
133 format = Image::FORMAT_LA8;
134 break;
135 case GL_SRGB8:
136 format = Image::FORMAT_RGB8;
137 srgb = true;
138 break;
139 case GL_SRGB8_ALPHA8:
140 format = Image::FORMAT_RGBA8;
141 srgb = true;
142 break;
143 case GL_R8:
144 case GL_R8UI:
145 format = Image::FORMAT_R8;
146 break;
147 case GL_RG8:
148 format = Image::FORMAT_RG8;
149 break;
150 case GL_RGB8:
151 format = Image::FORMAT_RGB8;
152 break;
153 case GL_RGBA8:
154 format = Image::FORMAT_RGBA8;
155 break;
156 case GL_RGBA4:
157 format = Image::FORMAT_RGBA4444;
158 break;
159 case GL_RGB565:
160 format = Image::FORMAT_RGB565;
161 break;
162 case GL_R32F:
163 format = Image::FORMAT_RF;
164 break;
165 case GL_RG32F:
166 format = Image::FORMAT_RGF;
167 break;
168 case GL_RGB32F:
169 format = Image::FORMAT_RGBF;
170 break;
171 case GL_RGBA32F:
172 format = Image::FORMAT_RGBAF;
173 break;
174 case GL_R16F:
175 format = Image::FORMAT_RH;
176 break;
177 case GL_RG16F:
178 format = Image::FORMAT_RGH;
179 break;
180 case GL_RGB16F:
181 format = Image::FORMAT_RGBH;
182 break;
183 case GL_RGBA16F:
184 format = Image::FORMAT_RGBAH;
185 break;
186 case GL_RGB9_E5:
187 format = Image::FORMAT_RGBE9995;
188 break;
189 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
190 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
191 format = Image::FORMAT_DXT1;
192 break;
193 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
194 format = Image::FORMAT_DXT3;
195 break;
196 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
197 format = Image::FORMAT_DXT5;
198 break;
199 case GL_COMPRESSED_RED_RGTC1:
200 format = Image::FORMAT_RGTC_R;
201 break;
202 case GL_COMPRESSED_RG_RGTC2:
203 format = Image::FORMAT_RGTC_RG;
204 break;
205 case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
206 format = Image::FORMAT_BPTC_RGBFU;
207 break;
208 case GL_COMPRESSED_RGBA_BPTC_UNORM:
209 format = Image::FORMAT_BPTC_RGBA;
210 break;
211#if 0 // TODO: ETC compression is bogus.
212 case GL_ETC1_RGB8_OES:
213 format = Image::FORMAT_ETC;
214 break;
215 case GL_COMPRESSED_R11_EAC:
216 format = Image::FORMAT_ETC2_R11;
217 break;
218 case GL_COMPRESSED_SIGNED_R11_EAC:
219 format = Image::FORMAT_ETC2_R11S;
220 break;
221 case GL_COMPRESSED_RG11_EAC:
222 format = Image::FORMAT_ETC2_RG11;
223 break;
224 case GL_COMPRESSED_SIGNED_RG11_EAC:
225 format = Image::FORMAT_ETC2_RG11S;
226 break;
227 case GL_COMPRESSED_RGB8_ETC2:
228 format = Image::FORMAT_ETC2_RGB8;
229 break;
230 case GL_COMPRESSED_RGBA8_ETC2_EAC:
231 format = Image::FORMAT_ETC2_RGBA8;
232 break;
233 case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
234 format = Image::FORMAT_ETC2_RGB8A1;
235 break;
236#endif
237 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR:
238 format = Image::FORMAT_ASTC_4x4;
239 break;
240 case GL_COMPRESSED_RGBA_ASTC_4x4_KHR:
241 format = Image::FORMAT_ASTC_4x4_HDR;
242 break;
243 case GL_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR:
244 format = Image::FORMAT_ASTC_8x8;
245 break;
246 case GL_COMPRESSED_RGBA_ASTC_8x8_KHR:
247 format = Image::FORMAT_ASTC_8x8_HDR;
248 break;
249 default:
250 ktxTexture_Destroy(ktx_texture);
251 ERR_FAIL_V_MSG(Ref<Resource>(), "Unsupported format " + itos(((ktxTexture1 *)ktx_texture)->glInternalformat) + " of KTX1 texture file.");
252 }
253 break;
254 case ktxTexture2_c: {
255 ktxTexture2 *ktx_texture2 = reinterpret_cast<ktxTexture2 *>(ktx_texture);
256 if (ktx_texture2->vkFormat == VK_FORMAT_UNDEFINED) {
257 if (!ktxTexture2_NeedsTranscoding(ktx_texture2)) {
258 ktxTexture_Destroy(ktx_texture);
259 ERR_FAIL_V_MSG(Ref<Resource>(), "Invalid VK_FORMAT_UNDEFINED of KTX2 texture file.");
260 }
261 ktx_transcode_fmt_e ktxfmt;
262 switch (ktxTexture2_GetNumComponents(ktx_texture2)) {
263 case 1: {
264 if (ktxTexture2_GetOETF_e(ktx_texture2) == KHR_DF_TRANSFER_SRGB) { // TODO srgb native support
265 ktxfmt = KTX_TTF_RGBA32;
266 } else if (RS::get_singleton()->has_os_feature("rgtc")) {
267 ktxfmt = KTX_TTF_BC4_R;
268 } else {
269 ktxfmt = KTX_TTF_RGBA32;
270 }
271 break;
272 }
273 case 2: {
274 if (ktxTexture2_GetOETF_e(ktx_texture2) == KHR_DF_TRANSFER_SRGB) { // TODO srgb native support
275 ktxfmt = KTX_TTF_RGBA32;
276 } else if (RS::get_singleton()->has_os_feature("rgtc")) {
277 ktxfmt = KTX_TTF_BC5_RG;
278 } else {
279 ktxfmt = KTX_TTF_RGBA32;
280 }
281 break;
282 }
283 case 3: {
284 if (ktxTexture2_GetOETF_e(ktx_texture2) == KHR_DF_TRANSFER_SRGB) { // TODO: srgb native support
285 ktxfmt = KTX_TTF_RGBA32;
286 } else if (RS::get_singleton()->has_os_feature("bptc")) {
287 ktxfmt = KTX_TTF_BC7_RGBA;
288 } else if (RS::get_singleton()->has_os_feature("s3tc")) {
289 ktxfmt = KTX_TTF_BC1_RGB;
290 } else if (RS::get_singleton()->has_os_feature("etc")) {
291 ktxfmt = KTX_TTF_ETC1_RGB;
292 } else {
293 ktxfmt = KTX_TTF_RGBA32;
294 }
295 break;
296 }
297 case 4: {
298 if (ktxTexture2_GetOETF_e(ktx_texture2) == KHR_DF_TRANSFER_SRGB) { // TODO srgb native support
299 ktxfmt = KTX_TTF_RGBA32;
300 } else if (RS::get_singleton()->has_os_feature("astc")) {
301 ktxfmt = KTX_TTF_ASTC_4x4_RGBA;
302 } else if (RS::get_singleton()->has_os_feature("bptc")) {
303 ktxfmt = KTX_TTF_BC7_RGBA;
304 } else if (RS::get_singleton()->has_os_feature("s3tc")) {
305 ktxfmt = KTX_TTF_BC3_RGBA;
306 } else if (RS::get_singleton()->has_os_feature("etc2")) {
307 ktxfmt = KTX_TTF_ETC2_RGBA;
308 } else {
309 ktxfmt = KTX_TTF_RGBA32;
310 }
311 break;
312 }
313 default: {
314 ktxTexture_Destroy(ktx_texture);
315 ERR_FAIL_V_MSG(Ref<Resource>(), "Invalid components of KTX2 texture file.");
316 }
317 }
318 result = ktxTexture2_TranscodeBasis(ktx_texture2, ktxfmt, 0);
319 if (result != KTX_SUCCESS) {
320 ktxTexture_Destroy(ktx_texture);
321 ERR_FAIL_V_MSG(Ref<Resource>(), "Failed to transcode KTX2 texture file.");
322 }
323 }
324 switch (ktx_texture2->vkFormat) {
325 case VK_FORMAT_R8_UNORM:
326 format = Image::FORMAT_L8;
327 break;
328 case VK_FORMAT_R8G8_UNORM:
329 format = Image::FORMAT_LA8;
330 break;
331 case VK_FORMAT_R8G8B8_SRGB:
332 format = Image::FORMAT_RGB8;
333 srgb = true;
334 break;
335 case VK_FORMAT_R8G8B8A8_SRGB:
336 format = Image::FORMAT_RGBA8;
337 srgb = true;
338 break;
339 case VK_FORMAT_R8_UINT:
340 format = Image::FORMAT_R8;
341 break;
342 case VK_FORMAT_R8G8_UINT:
343 format = Image::FORMAT_RG8;
344 break;
345 case VK_FORMAT_R8G8B8_UINT:
346 format = Image::FORMAT_RGB8;
347 break;
348 case VK_FORMAT_R8G8B8A8_UINT:
349 format = Image::FORMAT_RGBA8;
350 break;
351 case VK_FORMAT_R4G4B4A4_UNORM_PACK16:
352 format = Image::FORMAT_RGBA4444;
353 break;
354 case VK_FORMAT_R5G6B5_UNORM_PACK16:
355 format = Image::FORMAT_RGB565;
356 break;
357 case VK_FORMAT_R32_SFLOAT:
358 format = Image::FORMAT_RF;
359 break;
360 case VK_FORMAT_R32G32_SFLOAT:
361 format = Image::FORMAT_RGF;
362 break;
363 case VK_FORMAT_R32G32B32_SFLOAT:
364 format = Image::FORMAT_RGBF;
365 break;
366 case VK_FORMAT_R32G32B32A32_SFLOAT:
367 format = Image::FORMAT_RGBAF;
368 break;
369 case VK_FORMAT_R16_SFLOAT:
370 format = Image::FORMAT_RH;
371 break;
372 case VK_FORMAT_R16G16_SFLOAT:
373 format = Image::FORMAT_RGH;
374 break;
375 case VK_FORMAT_R16G16B16_SFLOAT:
376 format = Image::FORMAT_RGBH;
377 break;
378 case VK_FORMAT_R16G16B16A16_SFLOAT:
379 format = Image::FORMAT_RGBAH;
380 break;
381 case VK_FORMAT_E5B9G9R9_UFLOAT_PACK32:
382 format = Image::FORMAT_RGBE9995;
383 break;
384 case VK_FORMAT_BC1_RGB_UNORM_BLOCK:
385 case VK_FORMAT_BC1_RGBA_UNORM_BLOCK:
386 format = Image::FORMAT_DXT1;
387 break;
388 case VK_FORMAT_BC2_UNORM_BLOCK:
389 format = Image::FORMAT_DXT3;
390 break;
391 case VK_FORMAT_BC3_UNORM_BLOCK:
392 format = Image::FORMAT_DXT5;
393 break;
394 case VK_FORMAT_BC4_UNORM_BLOCK:
395 format = Image::FORMAT_RGTC_R;
396 break;
397 case VK_FORMAT_BC5_UNORM_BLOCK:
398 format = Image::FORMAT_RGTC_RG;
399 break;
400 case VK_FORMAT_BC6H_UFLOAT_BLOCK:
401 format = Image::FORMAT_BPTC_RGBFU;
402 break;
403 case VK_FORMAT_BC6H_SFLOAT_BLOCK:
404 format = Image::FORMAT_BPTC_RGBF;
405 break;
406 case VK_FORMAT_BC7_UNORM_BLOCK:
407 format = Image::FORMAT_BPTC_RGBA;
408 break;
409#if 0 // TODO: ETC compression is bogus.
410 case VK_FORMAT_EAC_R11_UNORM_BLOCK:
411 format = Image::FORMAT_ETC2_R11;
412 break;
413 case VK_FORMAT_EAC_R11_SNORM_BLOCK:
414 format = Image::FORMAT_ETC2_R11S;
415 break;
416 case VK_FORMAT_EAC_R11G11_UNORM_BLOCK:
417 format = Image::FORMAT_ETC2_RG11;
418 break;
419 case VK_FORMAT_EAC_R11G11_SNORM_BLOCK:
420 format = Image::FORMAT_ETC2_RG11S;
421 break;
422 case VK_FORMAT_ETC2_R8G8B8_UNORM_BLOCK:
423 format = Image::FORMAT_ETC2_RGB8;
424 break;
425 case VK_FORMAT_ETC2_R8G8B8A8_UNORM_BLOCK:
426 format = Image::FORMAT_ETC2_RGBA8;
427 break;
428 case VK_FORMAT_ETC2_R8G8B8A1_UNORM_BLOCK:
429 format = Image::FORMAT_ETC2_RGB8A1;
430 break;
431#endif
432 case VK_FORMAT_ASTC_4x4_SRGB_BLOCK:
433 format = Image::FORMAT_ASTC_4x4;
434 break;
435 case VK_FORMAT_ASTC_4x4_UNORM_BLOCK:
436 format = Image::FORMAT_ASTC_4x4_HDR;
437 break;
438 case VK_FORMAT_ASTC_8x8_SRGB_BLOCK:
439 format = Image::FORMAT_ASTC_8x8;
440 break;
441 case VK_FORMAT_ASTC_8x8_UNORM_BLOCK:
442 format = Image::FORMAT_ASTC_8x8_HDR;
443 break;
444 default:
445 ktxTexture_Destroy(ktx_texture);
446 ERR_FAIL_V_MSG(Ref<Resource>(), "Unsupported format " + itos(((ktxTexture2 *)ktx_texture)->vkFormat) + " of KTX2 texture file.");
447 break;
448 }
449 break;
450 }
451 default:
452 ktxTexture_Destroy(ktx_texture);
453 ERR_FAIL_V_MSG(Ref<Resource>(), "Unsupported version KTX texture file.");
454 break;
455 }
456
457 Vector<uint8_t> src_data;
458
459 // KTX use 4-bytes padding, don't use mipmaps if padding is effective
460 // TODO: unpad dynamically
461 int pixel_size = Image::get_format_pixel_size(format);
462 int pixel_rshift = Image::get_format_pixel_rshift(format);
463 int block = Image::get_format_block_size(format);
464 int minw, minh;
465 Image::get_format_min_pixel_size(format, minw, minh);
466 int w = width;
467 int h = height;
468 for (uint32_t i = 0; i < mipmaps; ++i) {
469 ktx_size_t mip_size = ktxTexture_GetImageSize(ktx_texture, i);
470 size_t bw = w % block != 0 ? w + (block - w % block) : w;
471 size_t bh = h % block != 0 ? h + (block - h % block) : h;
472 size_t s = bw * bh;
473 s *= pixel_size;
474 s >>= pixel_rshift;
475 if (mip_size != static_cast<ktx_size_t>(s)) {
476 if (!i) {
477 ktxTexture_Destroy(ktx_texture);
478 ERR_FAIL_V_MSG(Ref<Resource>(), "Unsupported padded KTX texture file.");
479 }
480 mipmaps = 1;
481 break;
482 }
483 w = MAX(minw, w >> 1);
484 h = MAX(minh, h >> 1);
485 }
486
487 for (uint32_t i = 0; i < mipmaps; ++i) {
488 ktx_size_t mip_size = ktxTexture_GetImageSize(ktx_texture, i);
489 ktx_size_t offset;
490 if (ktxTexture_GetImageOffset(ktx_texture, i, 0, 0, &offset) != KTX_SUCCESS) {
491 ktxTexture_Destroy(ktx_texture);
492 ERR_FAIL_V_MSG(Ref<Resource>(), "Invalid KTX texture file.");
493 }
494 int prev_size = src_data.size();
495 src_data.resize(prev_size + mip_size);
496 memcpy(src_data.ptrw() + prev_size, ktxTexture_GetData(ktx_texture) + offset, mip_size);
497 }
498
499 Ref<Image> img = memnew(Image(width, height, mipmaps - 1, format, src_data));
500 if (srgb) {
501 img->srgb_to_linear();
502 }
503
504 if (r_error) {
505 *r_error = OK;
506 }
507
508 ktxTexture_Destroy(ktx_texture);
509 return img;
510}
511
512Ref<Resource> ResourceFormatKTX::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, CacheMode p_cache_mode) {
513 if (r_error) {
514 *r_error = ERR_CANT_OPEN;
515 }
516
517 Error err;
518 Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ, &err);
519 if (f.is_null()) {
520 return Ref<Resource>();
521 }
522
523 Ref<FileAccess> fref(f);
524 if (r_error) {
525 *r_error = ERR_FILE_CORRUPT;
526 }
527
528 ERR_FAIL_COND_V_MSG(err != OK, Ref<Resource>(), "Unable to open KTX texture file '" + p_path + "'.");
529 Ref<Image> img = load_from_file_access(f, r_error);
530 Ref<ImageTexture> texture = ImageTexture::create_from_image(img);
531 return texture;
532}
533
534static Ref<Image> _ktx_mem_loader_func(const uint8_t *p_ktx, int p_size) {
535 Ref<FileAccessMemory> f;
536 f.instantiate();
537 f->open_custom(p_ktx, p_size);
538 Error err;
539 Ref<Image> img = load_from_file_access(f, &err);
540 ERR_FAIL_COND_V(err, Ref<Image>());
541 return img;
542}
543
544void ResourceFormatKTX::get_recognized_extensions(List<String> *p_extensions) const {
545 p_extensions->push_back("ktx");
546 p_extensions->push_back("ktx2");
547}
548
549bool ResourceFormatKTX::handles_type(const String &p_type) const {
550 return ClassDB::is_parent_class(p_type, "Texture2D");
551}
552
553String ResourceFormatKTX::get_resource_type(const String &p_path) const {
554 if (p_path.get_extension().to_lower() == "ktx" || p_path.get_extension().to_lower() == "ktx2") {
555 return "ImageTexture";
556 }
557 return "";
558}
559
560ResourceFormatKTX::ResourceFormatKTX() {
561 Image::_ktx_mem_loader_func = _ktx_mem_loader_func;
562}
563