401 lines
9.2 KiB
C
401 lines
9.2 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/datatoc/datatoc_icon.c
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* \ingroup datatoc
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <errno.h>
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/* for bool */
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#include "../blenlib/BLI_sys_types.h"
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/* for DIR */
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#if !defined(WIN32) || defined(FREEWINDOWS)
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# include <dirent.h>
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#endif
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#include "png.h"
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/* for Win32 DIR functions */
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#ifdef WIN32
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# include "../blenlib/BLI_winstuff.h"
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#endif
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#ifdef WIN32
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# define SEP '\\'
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#else
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# define SEP '/'
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#endif
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#if defined(_MSC_VER)
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# define __func__ __FUNCTION__
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#endif
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/* -------------------------------------------------------------------- */
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/* Utility functions */
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static int path_ensure_slash(char *string)
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{
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int len = strlen(string);
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if (len == 0 || string[len - 1] != SEP) {
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string[len] = SEP;
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string[len + 1] = '\0';
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return len + 1;
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}
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return len;
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}
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static bool path_test_extension(const char *str, const char *ext)
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{
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const size_t a = strlen(str);
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const size_t b = strlen(ext);
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return !(a == 0 || b == 0 || b >= a) && (strcmp(ext, str + a - b) == 0);
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}
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static void endian_switch_uint32(unsigned int *val)
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{
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unsigned int tval = *val;
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*val = ((tval >> 24)) |
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((tval << 8) & 0x00ff0000) |
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((tval >> 8) & 0x0000ff00) |
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((tval << 24));
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}
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/* -------------------------------------------------------------------- */
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/* Write a PNG from RGBA pixels */
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static bool write_png(const char *name, const unsigned int *pixels,
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const int width, const int height)
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{
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png_structp png_ptr;
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png_infop info_ptr;
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png_bytepp row_pointers = NULL;
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FILE *fp;
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const int bytesperpixel = 4;
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const int compression = 9;
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int i;
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fp = fopen(name, "wb");
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if (fp == NULL) {
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printf("%s: Cannot open file for writing '%s'\n", __func__, name);
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return false;
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}
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png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,
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NULL, NULL, NULL);
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if (png_ptr == NULL) {
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printf("%s: Cannot png_create_write_struct for file: '%s'\n", __func__, name);
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fclose(fp);
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return false;
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}
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info_ptr = png_create_info_struct(png_ptr);
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if (info_ptr == NULL) {
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png_destroy_write_struct(&png_ptr, (png_infopp)NULL);
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printf("%s: Cannot png_create_info_struct for file: '%s'\n", __func__, name);
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fclose(fp);
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return false;
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}
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if (setjmp(png_jmpbuf(png_ptr))) {
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png_destroy_write_struct(&png_ptr, &info_ptr);
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printf("%s: Cannot setjmp for file: '%s'\n", __func__, name);
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fclose(fp);
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return false;
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}
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/* write the file */
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png_init_io(png_ptr, fp);
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png_set_compression_level(png_ptr, compression);
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/* png image settings */
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png_set_IHDR(png_ptr,
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info_ptr,
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width,
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height,
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8,
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PNG_COLOR_TYPE_RGBA,
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PNG_INTERLACE_NONE,
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PNG_COMPRESSION_TYPE_DEFAULT,
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PNG_FILTER_TYPE_DEFAULT);
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/* write the file header information */
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png_write_info(png_ptr, info_ptr);
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#ifdef __LITTLE_ENDIAN__
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png_set_swap(png_ptr);
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#endif
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/* allocate memory for an array of row-pointers */
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row_pointers = (png_bytepp) malloc(height * sizeof(png_bytep));
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if (row_pointers == NULL) {
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printf("%s: Cannot allocate row-pointers array for file '%s'\n", __func__, name);
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png_destroy_write_struct(&png_ptr, &info_ptr);
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if (fp) {
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fclose(fp);
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}
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return false;
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}
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/* set the individual row-pointers to point at the correct offsets */
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for (i = 0; i < height; i++) {
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row_pointers[height - 1 - i] = (png_bytep)
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(((const unsigned char *)pixels) +
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(i * width) * bytesperpixel * sizeof(unsigned char));
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}
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/* write out the entire image data in one call */
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png_write_image(png_ptr, row_pointers);
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/* write the additional chunks to the PNG file (not really needed) */
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png_write_end(png_ptr, info_ptr);
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/* clean up */
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free(row_pointers);
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png_destroy_write_struct(&png_ptr, &info_ptr);
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fflush(fp);
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fclose(fp);
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return true;
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}
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/* -------------------------------------------------------------------- */
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/* Merge icon-data from files */
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struct IconHead {
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unsigned int icon_w, icon_h;
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unsigned int orig_x, orig_y;
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unsigned int canvas_w, canvas_h;
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};
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static bool icon_decode_head(FILE *f_src,
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struct IconHead *r_head)
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{
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if (fread(r_head, 1, sizeof(*r_head), f_src) == sizeof(*r_head)) {
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#ifndef __LITTLE_ENDIAN__
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endian_switch_uint32(&r_head->icon_w);
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endian_switch_uint32(&r_head->icon_h);
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endian_switch_uint32(&r_head->orig_x);
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endian_switch_uint32(&r_head->orig_y);
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endian_switch_uint32(&r_head->canvas_w);
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endian_switch_uint32(&r_head->canvas_h);
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#endif
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return true;
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}
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/* quiet warning */
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(void)endian_switch_uint32;
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return false;
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}
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static bool icon_decode(FILE *f_src,
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struct IconHead *r_head, unsigned int **r_pixels)
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{
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unsigned int *pixels;
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unsigned int pixels_size;
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if (!icon_decode_head(f_src, r_head)) {
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printf("%s: failed to read header\n", __func__);
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return false;
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}
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pixels_size = sizeof(char[4]) * r_head->icon_w * r_head->icon_h;
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pixels = malloc(pixels_size);
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if (pixels == NULL) {
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printf("%s: failed to allocate pixels\n", __func__);
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return false;
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}
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if (fread(pixels, 1, pixels_size, f_src) != pixels_size) {
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printf("%s: failed to read pixels\n", __func__);
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free(pixels);
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return false;
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}
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*r_pixels = pixels;
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return true;
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}
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static bool icon_read(const char *file_src,
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struct IconHead *r_head, unsigned int **r_pixels)
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{
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FILE *f_src;
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bool success;
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f_src = fopen(file_src, "rb");
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if (f_src == NULL) {
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printf("%s: failed to open '%s'\n", __func__, file_src);
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return false;
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}
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success = icon_decode(f_src, r_head, r_pixels);
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fclose(f_src);
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return success;
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}
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static bool icon_merge(const char *file_src,
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unsigned int **r_pixels_canvas,
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unsigned int *r_canvas_w, unsigned int *r_canvas_h)
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{
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struct IconHead head;
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unsigned int *pixels;
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unsigned int x, y;
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/* canvas */
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unsigned int *pixels_canvas;
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unsigned int canvas_w, canvas_h;
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if (!icon_read(file_src, &head, &pixels)) {
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return false;
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}
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if (*r_canvas_w == 0) {
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/* init once */
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*r_canvas_w = head.canvas_w;
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*r_canvas_h = head.canvas_h;
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*r_pixels_canvas = calloc(1, (head.canvas_w * head.canvas_h) * sizeof(unsigned char[4]));
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}
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canvas_w = *r_canvas_w;
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canvas_h = *r_canvas_h;
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pixels_canvas = *r_pixels_canvas;
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assert(head.canvas_w == canvas_w);
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assert(head.canvas_h == canvas_h);
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for (x = 0; x < head.icon_w; x++) {
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for (y = 0; y < head.icon_h; y++) {
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unsigned int pixel;
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unsigned int dst_x, dst_y;
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unsigned int pixel_xy_dst;
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/* get pixel */
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pixel = pixels[(y * head.icon_w) + x];
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/* set pixel */
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dst_x = head.orig_x + x;
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dst_y = head.orig_y + y;
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pixel_xy_dst = (dst_y * canvas_w) + dst_x;
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assert(pixel_xy_dst < (canvas_w * canvas_h));
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pixels_canvas[pixel_xy_dst] = pixel;
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}
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}
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free(pixels);
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/* only for bounds check */
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(void)canvas_h;
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return true;
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}
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static bool icondir_to_png(const char *path_src, const char *file_dst)
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{
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/* Takes a path full of 'dat' files and writes out */
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DIR *dir;
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const struct dirent *fname;
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char filepath[1024];
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char *filename;
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int path_str_len;
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int found = 0, fail = 0;
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unsigned int *pixels_canvas = NULL;
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unsigned int canvas_w = 0, canvas_h = 0;
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errno = 0;
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dir = opendir(path_src);
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if (dir == NULL) {
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printf("%s: failed to dir '%s', (%s)\n", __func__, path_src, errno ? strerror(errno) : "unknown");
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return false;
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}
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strcpy(filepath, path_src);
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path_str_len = path_ensure_slash(filepath);
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filename = &filepath[path_str_len];
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while ((fname = readdir(dir)) != NULL) {
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if (path_test_extension(fname->d_name, ".dat")) {
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strcpy(filename, fname->d_name);
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if (icon_merge(filepath, &pixels_canvas, &canvas_w, &canvas_h)) {
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found++;
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}
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else {
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fail++;
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}
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}
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}
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closedir(dir);
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if (found == 0) {
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printf("%s: dir '%s' has no icons\n", __func__, path_src);
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}
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if (fail != 0) {
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printf("%s: dir '%s' failed %d icons\n", __func__, path_src, fail);
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}
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/* write pixels */
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write_png(file_dst, pixels_canvas, canvas_w, canvas_h);
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free(pixels_canvas);
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return true;
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}
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/* -------------------------------------------------------------------- */
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/* Main and parse args */
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int main(int argc, char **argv)
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{
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const char *path_src;
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const char *file_dst;
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if (argc < 3) {
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printf("Usage: datatoc_icon <dir_icons> <data_icon_to.png>\n");
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exit(1);
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}
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path_src = argv[1];
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file_dst = argv[2];
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return (icondir_to_png(path_src, file_dst) == true) ? 0 : 1;
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}
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