mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-24 18:56:33 +00:00
136 lines
3.7 KiB
C++
136 lines
3.7 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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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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* 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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* 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
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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#include "common/endian.h"
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#include "sci/gfx/gfx_system.h"
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#include "sci/gfx/gfx_resource.h"
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#include "sci/gfx/gfx_tools.h"
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#include "sci/gui32/font.h"
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namespace Sci {
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extern int font_counter;
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#define FONT_HEIGHT_OFFSET 4
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#define FONT_MAXCHAR_OFFSET 2
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static void calc_char(byte *dest, int total_width, int total_height, byte *src, int size) {
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int width = src[0];
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int height = src[1];
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int byte_width = (width + 7) >> 3;
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int y;
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src += 2;
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if ((width >> 3) > total_width || height > total_height) {
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error("Weird character: width=%d/%d, height=%d/%d", width, total_width, height, total_height);
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}
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if (byte_width * height + 2 > size) {
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error("Character extends to %d of %d allowed bytes", byte_width * height + 2, size);
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}
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for (y = 0; y < height; y++) {
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memcpy(dest, src, byte_width);
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src += byte_width;
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dest += total_width;
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}
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}
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gfx_bitmap_font_t *gfxr_read_font(int id, byte *resource, int size) {
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gfx_bitmap_font_t *font = (gfx_bitmap_font_t*)calloc(sizeof(gfx_bitmap_font_t), 1);
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int chars_nr;
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int max_width = 0, max_height;
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int i;
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++font_counter;
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if (size < 6) {
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error("Font %04x size is %d", id, size);
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gfxr_free_font(font);
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return NULL;
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}
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font->chars_nr = chars_nr = READ_LE_UINT16(resource + FONT_MAXCHAR_OFFSET);
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font->line_height = max_height = READ_LE_UINT16(resource + FONT_HEIGHT_OFFSET);
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if (chars_nr < 0 || chars_nr > 256 || max_height < 0) {
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if (chars_nr < 0 || chars_nr > 256)
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error("Font %04x: Invalid number of characters: %d", id, chars_nr);
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if (max_height < 0)
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error("Font %04x: Invalid font height: %d", id, max_height);
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gfxr_free_font(font);
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return NULL;
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}
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if (size < 6 + chars_nr * 2) {
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error("Font %04x: Insufficient space for %d characters in font", id, chars_nr);
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gfxr_free_font(font);
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return NULL;
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}
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font->ID = id;
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font->widths = (int*)malloc(sizeof(int) * chars_nr);
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for (i = 0; i < chars_nr; i++) {
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int offset = READ_LE_UINT16(resource + (i << 1) + 6);
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if (offset >= size) {
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error("Font %04x: Error: Character 0x%02x is at offset 0x%04x (beyond 0x%04x)", id, i, offset, size);
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gfxr_free_font(font);
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return NULL;
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}
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if ((resource[offset]) > max_width)
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max_width = resource[offset];
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if ((resource[offset + 1]) > max_height)
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max_height = resource[offset + 1];
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font->widths[i] = resource[offset];
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}
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font->height = max_height;
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font->row_size = (max_width + 7) >> 3;
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if (font->row_size == 3)
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font->row_size = 4;
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if (font->row_size > 4)
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font->row_size = (font->row_size + 3) & ~3;
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font->char_size = font->row_size * max_height;
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font->data = (byte *)calloc(font->char_size, chars_nr);
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for (i = 0; i < chars_nr; i++) {
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int offset = READ_LE_UINT16(resource + (i << 1) + 6);
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calc_char(font->data + (font->char_size * i), font->row_size, max_height, resource + offset, size - offset);
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}
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return font;
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}
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} // End of namespace Sci
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