mirror of
https://github.com/Qortal/Brooklyn.git
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114 lines
4.2 KiB
C
114 lines
4.2 KiB
C
/*
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Copyright (c) 2013, Broadcom Europe Ltd
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Copyright (c) 2013, Tim Gover
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the copyright holder nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "tga.h"
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#include <string.h>
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#define TGA_WRITE(FP, F) \
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if (fwrite((&F), sizeof(F), 1, (FP)) != 1) goto write_fail
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int write_tga(FILE *fp, int width, int height,
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uint8_t *buffer, size_t buffer_size)
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{
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struct tga_header header;
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memset(&header, 0, sizeof(header));
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header.image_type = tga_type_true_color;
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header.image_info.width = width;
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header.image_info.y_origin = height;
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header.image_info.height = height;
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header.image_info.bpp = 32;
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TGA_WRITE(fp, header.id_length);
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TGA_WRITE(fp, header.color_map_type);
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TGA_WRITE(fp, header.image_type);
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TGA_WRITE(fp, header.colormap_info.offset);
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TGA_WRITE(fp, header.colormap_info.length);
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TGA_WRITE(fp, header.colormap_info.bpp);
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TGA_WRITE(fp, header.image_info.x_origin);
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TGA_WRITE(fp, header.image_info.y_origin);
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TGA_WRITE(fp, header.image_info.width);
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TGA_WRITE(fp, header.image_info.height);
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TGA_WRITE(fp, header.image_info.bpp);
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TGA_WRITE(fp, header.image_info.descriptor);
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if (fwrite(buffer, 1, buffer_size, fp) != buffer_size)
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goto write_fail;
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return 0;
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write_fail:
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return -1;
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}
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#define TGA_READ(FP, F) if (fread((&F), sizeof(F), 1, (FP)) != 1) goto read_fail
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static int read_header(FILE *fp, struct tga_header *header) {
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TGA_READ(fp, header->id_length);
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TGA_READ(fp, header->color_map_type);
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TGA_READ(fp, header->image_type);
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TGA_READ(fp, header->colormap_info.offset);
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TGA_READ(fp, header->colormap_info.length);
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TGA_READ(fp, header->colormap_info.bpp);
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TGA_READ(fp, header->image_info.x_origin);
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TGA_READ(fp, header->image_info.y_origin);
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TGA_READ(fp, header->image_info.width);
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TGA_READ(fp, header->image_info.height);
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TGA_READ(fp, header->image_info.bpp);
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TGA_READ(fp, header->image_info.descriptor);
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return 0;
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read_fail:
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return -1;
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}
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unsigned char *load_tga(const char *filename, struct tga_header *header) {
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unsigned char *image = NULL;
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FILE *fp = fopen(filename, "r");
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if (fp) {
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if(read_header(fp, header) == 0) {
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if (header->image_type == tga_type_true_color &&
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(header->image_info.bpp == 24 ||
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header->image_info.bpp == 32)) {
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int buflen = header->image_info.width *
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header->image_info.height * (header->image_info.bpp / 8);
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image = malloc(buflen);
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if (image) {
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if (header->id_length)
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fseek(fp, SEEK_CUR, header->id_length);
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if (fread(image, 1, buflen, fp) != buflen) {
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free(image);
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image = NULL;
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}
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}
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}
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}
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fclose(fp);
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}
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return image;
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}
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