| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (image_texture.c). |
| 5 | * --------------------------------------------------------------------------------------- |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation the rights to |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <stdint.h> |
| 24 | #include <stdlib.h> |
| 25 | #include <string.h> |
| 26 | #include <stddef.h> |
| 27 | |
| 28 | #include <boolean.h> |
| 29 | #include <formats/image.h> |
| 30 | #include <file/nbio.h> |
| 31 | #include <string/stdstring.h> |
| 32 | |
| 33 | enum image_type_enum image_texture_get_type(const char *path) |
| 34 | { |
| 35 | /* We are comparing against a fixed list of file |
| 36 | * extensions, the longest (jpeg) being 4 characters |
| 37 | * in length. We therefore only need to extract the first |
| 38 | * 5 characters from the extension of the input path |
| 39 | * to correctly validate a match */ |
| 40 | const char *ext = NULL; |
| 41 | char ext_lower[6]; |
| 42 | |
| 43 | ext_lower[0] = '\0'; |
| 44 | |
| 45 | if (string_is_empty(path)) |
| 46 | return IMAGE_TYPE_NONE; |
| 47 | |
| 48 | /* Get file extension */ |
| 49 | ext = strrchr(path, '.'); |
| 50 | |
| 51 | if (!ext || (*(++ext) == '\0')) |
| 52 | return IMAGE_TYPE_NONE; |
| 53 | |
| 54 | /* Copy and convert to lower case */ |
| 55 | strlcpy(ext_lower, ext, sizeof(ext_lower)); |
| 56 | string_to_lower(ext_lower); |
| 57 | |
| 58 | #ifdef HAVE_RPNG |
| 59 | if (string_is_equal(ext_lower, "png")) |
| 60 | return IMAGE_TYPE_PNG; |
| 61 | #endif |
| 62 | #ifdef HAVE_RJPEG |
| 63 | if (string_is_equal(ext_lower, "jpg") || |
| 64 | string_is_equal(ext_lower, "jpeg")) |
| 65 | return IMAGE_TYPE_JPEG; |
| 66 | #endif |
| 67 | #ifdef HAVE_RBMP |
| 68 | if (string_is_equal(ext_lower, "bmp")) |
| 69 | return IMAGE_TYPE_BMP; |
| 70 | #endif |
| 71 | #ifdef HAVE_RTGA |
| 72 | if (string_is_equal(ext_lower, "tga")) |
| 73 | return IMAGE_TYPE_TGA; |
| 74 | #endif |
| 75 | |
| 76 | return IMAGE_TYPE_NONE; |
| 77 | } |
| 78 | |
| 79 | bool image_texture_set_color_shifts( |
| 80 | unsigned *r_shift, unsigned *g_shift, unsigned *b_shift, |
| 81 | unsigned *a_shift, |
| 82 | struct texture_image *out_img |
| 83 | ) |
| 84 | { |
| 85 | *a_shift = 24; |
| 86 | *r_shift = 16; |
| 87 | *g_shift = 8; |
| 88 | *b_shift = 0; |
| 89 | |
| 90 | if (out_img->supports_rgba) |
| 91 | { |
| 92 | *r_shift = 0; |
| 93 | *b_shift = 16; |
| 94 | return true; |
| 95 | } |
| 96 | |
| 97 | return false; |
| 98 | } |
| 99 | |
| 100 | bool image_texture_color_convert(unsigned r_shift, |
| 101 | unsigned g_shift, unsigned b_shift, unsigned a_shift, |
| 102 | struct texture_image *out_img) |
| 103 | { |
| 104 | /* This is quite uncommon. */ |
| 105 | if (a_shift != 24 || r_shift != 16 || g_shift != 8 || b_shift != 0) |
| 106 | { |
| 107 | uint32_t i; |
| 108 | uint32_t num_pixels = out_img->width * out_img->height; |
| 109 | uint32_t *pixels = (uint32_t*)out_img->pixels; |
| 110 | |
| 111 | for (i = 0; i < num_pixels; i++) |
| 112 | { |
| 113 | uint32_t col = pixels[i]; |
| 114 | uint8_t a = (uint8_t)(col >> 24); |
| 115 | uint8_t r = (uint8_t)(col >> 16); |
| 116 | uint8_t g = (uint8_t)(col >> 8); |
| 117 | uint8_t b = (uint8_t)(col >> 0); |
| 118 | /* Explicitly cast these to uint32_t to prevent |
| 119 | * ASAN runtime error: left shift of 255 by 24 places |
| 120 | * cannot be represented in type 'int' */ |
| 121 | pixels[i] = ((uint32_t)a << a_shift) | |
| 122 | ((uint32_t)r << r_shift) | |
| 123 | ((uint32_t)g << g_shift) | |
| 124 | ((uint32_t)b << b_shift); |
| 125 | } |
| 126 | |
| 127 | return true; |
| 128 | } |
| 129 | |
| 130 | return false; |
| 131 | } |
| 132 | |
| 133 | #ifdef GEKKO |
| 134 | |
| 135 | #define GX_BLIT_LINE_32(off) \ |
| 136 | { \ |
| 137 | unsigned x; \ |
| 138 | const uint16_t *tmp_src = src; \ |
| 139 | uint16_t *tmp_dst = dst; \ |
| 140 | for (x = 0; x < width2 >> 3; x++, tmp_src += 8, tmp_dst += 32) \ |
| 141 | { \ |
| 142 | tmp_dst[ 0 + off] = tmp_src[0]; \ |
| 143 | tmp_dst[ 16 + off] = tmp_src[1]; \ |
| 144 | tmp_dst[ 1 + off] = tmp_src[2]; \ |
| 145 | tmp_dst[ 17 + off] = tmp_src[3]; \ |
| 146 | tmp_dst[ 2 + off] = tmp_src[4]; \ |
| 147 | tmp_dst[ 18 + off] = tmp_src[5]; \ |
| 148 | tmp_dst[ 3 + off] = tmp_src[6]; \ |
| 149 | tmp_dst[ 19 + off] = tmp_src[7]; \ |
| 150 | } \ |
| 151 | src += tmp_pitch; \ |
| 152 | } |
| 153 | |
| 154 | static bool image_texture_internal_gx_convert_texture32( |
| 155 | struct texture_image *image) |
| 156 | { |
| 157 | unsigned tmp_pitch, width2, i; |
| 158 | const uint16_t *src = NULL; |
| 159 | uint16_t *dst = NULL; |
| 160 | /* Memory allocation in libogc is extremely primitive so try |
| 161 | * to avoid gaps in memory when converting by copying over to |
| 162 | * a temporary buffer first, then converting over into |
| 163 | * main buffer again. */ |
| 164 | void *tmp = malloc(image->width |
| 165 | * image->height * sizeof(uint32_t)); |
| 166 | |
| 167 | if (!tmp) |
| 168 | return false; |
| 169 | |
| 170 | memcpy(tmp, image->pixels, image->width |
| 171 | * image->height * sizeof(uint32_t)); |
| 172 | tmp_pitch = (image->width * sizeof(uint32_t)) >> 1; |
| 173 | |
| 174 | image->width &= ~3; |
| 175 | image->height &= ~3; |
| 176 | width2 = image->width << 1; |
| 177 | src = (uint16_t*)tmp; |
| 178 | dst = (uint16_t*)image->pixels; |
| 179 | |
| 180 | for (i = 0; i < image->height; i += 4, dst += 4 * width2) |
| 181 | { |
| 182 | GX_BLIT_LINE_32(0) |
| 183 | GX_BLIT_LINE_32(4) |
| 184 | GX_BLIT_LINE_32(8) |
| 185 | GX_BLIT_LINE_32(12) |
| 186 | } |
| 187 | |
| 188 | free(tmp); |
| 189 | return true; |
| 190 | } |
| 191 | #endif |
| 192 | |
| 193 | static bool image_texture_load_internal( |
| 194 | enum image_type_enum type, |
| 195 | void *ptr, |
| 196 | size_t len, |
| 197 | struct texture_image *out_img, |
| 198 | unsigned a_shift, unsigned r_shift, |
| 199 | unsigned g_shift, unsigned b_shift) |
| 200 | { |
| 201 | int ret; |
| 202 | bool success = false; |
| 203 | void *img = image_transfer_new(type); |
| 204 | |
| 205 | if (!img) |
| 206 | goto end; |
| 207 | |
| 208 | image_transfer_set_buffer_ptr(img, type, (uint8_t*)ptr, len); |
| 209 | |
| 210 | if (!image_transfer_start(img, type)) |
| 211 | goto end; |
| 212 | |
| 213 | while (image_transfer_iterate(img, type)); |
| 214 | |
| 215 | if (!image_transfer_is_valid(img, type)) |
| 216 | goto end; |
| 217 | |
| 218 | do |
| 219 | { |
| 220 | ret = image_transfer_process(img, type, |
| 221 | (uint32_t**)&out_img->pixels, len, &out_img->width, |
| 222 | &out_img->height); |
| 223 | } while (ret == IMAGE_PROCESS_NEXT); |
| 224 | |
| 225 | if (ret == IMAGE_PROCESS_ERROR || ret == IMAGE_PROCESS_ERROR_END) |
| 226 | goto end; |
| 227 | |
| 228 | image_texture_color_convert(r_shift, g_shift, b_shift, |
| 229 | a_shift, out_img); |
| 230 | |
| 231 | #ifdef GEKKO |
| 232 | if (!image_texture_internal_gx_convert_texture32(out_img)) |
| 233 | { |
| 234 | image_texture_free(out_img); |
| 235 | goto end; |
| 236 | } |
| 237 | #endif |
| 238 | |
| 239 | success = true; |
| 240 | |
| 241 | end: |
| 242 | if (img) |
| 243 | image_transfer_free(img, type); |
| 244 | |
| 245 | return success; |
| 246 | } |
| 247 | |
| 248 | void image_texture_free(struct texture_image *img) |
| 249 | { |
| 250 | if (!img) |
| 251 | return; |
| 252 | |
| 253 | if (img->pixels) |
| 254 | free(img->pixels); |
| 255 | img->width = 0; |
| 256 | img->height = 0; |
| 257 | img->pixels = NULL; |
| 258 | } |
| 259 | |
| 260 | bool image_texture_load_buffer(struct texture_image *out_img, |
| 261 | enum image_type_enum type, void *buffer, size_t buffer_len) |
| 262 | { |
| 263 | unsigned r_shift, g_shift, b_shift, a_shift; |
| 264 | image_texture_set_color_shifts(&r_shift, &g_shift, &b_shift, |
| 265 | &a_shift, out_img); |
| 266 | |
| 267 | if (type != IMAGE_TYPE_NONE) |
| 268 | { |
| 269 | if (image_texture_load_internal( |
| 270 | type, buffer, buffer_len, out_img, |
| 271 | a_shift, r_shift, g_shift, b_shift)) |
| 272 | { |
| 273 | return true; |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | out_img->supports_rgba = false; |
| 278 | out_img->pixels = NULL; |
| 279 | out_img->width = 0; |
| 280 | out_img->height = 0; |
| 281 | |
| 282 | return false; |
| 283 | } |
| 284 | |
| 285 | bool image_texture_load(struct texture_image *out_img, |
| 286 | const char *path) |
| 287 | { |
| 288 | unsigned r_shift, g_shift, b_shift, a_shift; |
| 289 | size_t file_len = 0; |
| 290 | struct nbio_t *handle = NULL; |
| 291 | void *ptr = NULL; |
| 292 | enum image_type_enum type = image_texture_get_type(path); |
| 293 | |
| 294 | image_texture_set_color_shifts(&r_shift, &g_shift, &b_shift, |
| 295 | &a_shift, out_img); |
| 296 | |
| 297 | if (type != IMAGE_TYPE_NONE) |
| 298 | { |
| 299 | handle = (struct nbio_t*)nbio_open(path, NBIO_READ); |
| 300 | if (!handle) |
| 301 | goto error; |
| 302 | nbio_begin_read(handle); |
| 303 | |
| 304 | while (!nbio_iterate(handle)); |
| 305 | |
| 306 | ptr = nbio_get_ptr(handle, &file_len); |
| 307 | |
| 308 | if (!ptr) |
| 309 | goto error; |
| 310 | |
| 311 | if (image_texture_load_internal( |
| 312 | type, |
| 313 | ptr, file_len, out_img, |
| 314 | a_shift, r_shift, g_shift, b_shift)) |
| 315 | goto success; |
| 316 | } |
| 317 | |
| 318 | error: |
| 319 | out_img->supports_rgba = false; |
| 320 | out_img->pixels = NULL; |
| 321 | out_img->width = 0; |
| 322 | out_img->height = 0; |
| 323 | if (handle) |
| 324 | nbio_free(handle); |
| 325 | |
| 326 | return false; |
| 327 | |
| 328 | success: |
| 329 | if (handle) |
| 330 | nbio_free(handle); |
| 331 | |
| 332 | return true; |
| 333 | } |