mirror of
https://github.com/libretro/RetroArch
synced 2025-01-29 18:32:44 +00:00
104 lines
3.2 KiB
C
104 lines
3.2 KiB
C
/* Copyright (C) 2010-2016 The RetroArch team
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*
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* ---------------------------------------------------------------------------------------
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* The following license statement only applies to this file (rtga.c).
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* ---------------------------------------------------------------------------------------
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*
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* Permission is hereby granted, free of charge,
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* to any person obtaining a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <formats/tga.h>
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#include <formats/image.h>
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bool rtga_image_load_shift(uint8_t *buf,
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void *data,
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unsigned a_shift, unsigned r_shift,
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unsigned g_shift, unsigned b_shift)
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{
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unsigned i, bits, size, bits_mul;
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uint8_t info[6] = {0};
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unsigned width = 0;
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unsigned height = 0;
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const uint8_t *tmp = NULL;
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struct texture_image *out_img = (struct texture_image*)data;
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if (!buf || buf[2] != 2)
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{
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fprintf(stderr, "TGA image is not uncompressed RGB.\n");
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goto error;
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}
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memcpy(info, buf + 12, 6);
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width = info[0] + ((unsigned)info[1] * 256);
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height = info[2] + ((unsigned)info[3] * 256);
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bits = info[4];
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fprintf(stderr, "Loaded TGA: (%ux%u @ %u bpp)\n", width, height, bits);
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size = width * height * sizeof(uint32_t);
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out_img->pixels = (uint32_t*)malloc(size);
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out_img->width = width;
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out_img->height = height;
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if (!out_img->pixels)
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{
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fprintf(stderr, "Failed to allocate TGA pixels.\n");
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goto error;
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}
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tmp = buf + 18;
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bits_mul = 3;
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if (bits != 32 && bits != 24)
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{
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fprintf(stderr, "Bit depth of TGA image is wrong. Only 32-bit and 24-bit supported.\n");
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goto error;
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}
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if (bits == 32)
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bits_mul = 4;
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for (i = 0; i < width * height; i++)
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{
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uint32_t b = tmp[i * bits_mul + 0];
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uint32_t g = tmp[i * bits_mul + 1];
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uint32_t r = tmp[i * bits_mul + 2];
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uint32_t a = tmp[i * bits_mul + 3];
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if (bits == 24)
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a = 0xff;
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out_img->pixels[i] = (a << a_shift) |
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(r << r_shift) | (g << g_shift) | (b << b_shift);
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}
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return true;
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error:
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if (out_img->pixels)
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free(out_img->pixels);
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out_img->pixels = NULL;
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out_img->width = out_img->height = 0;
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return false;
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}
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