mirror of
https://github.com/libretro/scummvm.git
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285 lines
7.2 KiB
C++
285 lines
7.2 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 2002-2003 The ScummVM project
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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
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*/
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#include "stdafx.h"
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#include "scumm.h"
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#include "nut_renderer.h"
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NutRenderer::NutRenderer(Scumm *vm) :
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_vm(vm),
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_initialized(false),
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_loaded(false),
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_nbChars(0) {
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for (int i = 0; i < 256; i++)
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_chars[i].src = NULL;
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}
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NutRenderer::~NutRenderer() {
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for (int i = 0; i < _nbChars; i++) {
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if (_chars[i].src)
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delete []_chars[i].src;
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}
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}
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void NutRenderer::decodeCodec44(byte *dst, const byte *src, uint32 length) {
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byte val;
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uint16 size_line, num;
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do {
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size_line = READ_LE_UINT16(src);
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src += 2;
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length -= 2;
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while (size_line != 0) {
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num = *src++;
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val = *src++;
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memset(dst, val, num);
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dst += num;
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length -= 2;
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size_line -= 2;
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if (size_line != 0) {
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num = READ_LE_UINT16(src) + 1;
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src += 2;
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memcpy(dst, src, num);
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dst += num;
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src += num;
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length -= num + 2;
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size_line -= num + 2;
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}
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}
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dst--;
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} while (length > 1);
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}
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bool NutRenderer::loadFont(const char *filename, const char *directory) {
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debug(8, "NutRenderer::loadFont() called");
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if (_loaded) {
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warning("NutRenderer::loadFont() Font already loaded, ok, loading...");
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}
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File file;
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file.open(filename, directory);
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if (file.isOpen() == false) {
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warning("NutRenderer::loadFont() Can't open font file: %s/%s", directory, filename);
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return false;
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}
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uint32 tag = file.readUint32BE();
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if (tag != 'ANIM') {
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warning("NutRenderer::loadFont() there is no ANIM chunk in font header");
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return false;
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}
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uint32 length = file.readUint32BE();
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byte *dataSrc = (byte *)malloc(length);
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file.read(dataSrc, length);
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file.close();
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if (READ_BE_UINT32(dataSrc) != 'AHDR') {
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warning("NutRenderer::loadFont() there is no AHDR chunk in font header");
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free(dataSrc);
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return false;
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}
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_nbChars = READ_LE_UINT16(dataSrc + 10);
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uint32 offset = READ_BE_UINT32(dataSrc + 4) + 8;
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for (int l = 0; l < _nbChars; l++) {
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if (READ_BE_UINT32(dataSrc + offset) == 'FRME') {
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offset += 8;
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if (READ_BE_UINT32(dataSrc + offset) == 'FOBJ') {
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_chars[l].width = READ_LE_UINT16(dataSrc + offset + 14);
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_chars[l].height = READ_LE_UINT16(dataSrc + offset + 16);
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_chars[l].src = new byte[_chars[l].width * _chars[l].height + 1000];
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decodeCodec44(_chars[l].src, dataSrc + offset + 22, READ_BE_UINT32(dataSrc + offset + 4) - 14);
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offset += READ_BE_UINT32(dataSrc + offset + 4) + 8;
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} else {
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warning("NutRenderer::loadFont(%s, %s) there is no FOBJ chunk in FRME chunk %d (offset %x)", filename, directory, l, offset);
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break;
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}
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} else {
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warning("NutRenderer::loadFont(%s, %s) there is no FRME chunk %d (offset %x)", filename, directory, l, offset);
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break;
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}
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}
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free(dataSrc);
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_loaded = true;
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return true;
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}
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int NutRenderer::getCharWidth(byte c) {
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debug(8, "NutRenderer::getCharWidth() called");
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if (!_loaded) {
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warning("NutRenderer::getCharWidth() Font is not loaded");
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return 0;
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}
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if (c >= 0x80 && _vm->_CJKMode) {
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if (_vm->_gameId == GID_CMI)
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return 8;
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if (_vm->_gameId == GID_DIG)
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return 6;
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return 0;
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}
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if (c >= _nbChars)
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error("invalid character in NutRenderer::getCharWidth : %d (%d)", c, _nbChars);
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return _chars[c].width;
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}
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int NutRenderer::getCharHeight(byte c) {
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debug(8, "NutRenderer::getCharHeight() called");
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if (!_loaded) {
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warning("NutRenderer::getCharHeight() Font is not loaded");
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return 0;
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}
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if (c >= 0x80 && _vm->_CJKMode) {
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if (_vm->_gameId == GID_CMI)
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return 16;
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if (_vm->_gameId == GID_DIG)
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return 10;
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return 0;
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}
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if (c >= _nbChars)
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error("invalid character in NutRenderer::getCharHeight : %d (%d)", c, _nbChars);
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return _chars[c].height;
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}
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void NutRenderer::drawShadowChar(int c, int x, int y, byte color, bool useMask) {
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debug(8, "NutRenderer::drawChar('%c', %d, %d, %d, %d) called", c, x, y, (int)color, useMask);
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if (!_loaded) {
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warning("NutRenderer::drawChar() Font is not loaded");
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return;
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}
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byte *dst, *mask = NULL;
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// HACK: we draw the character a total of 7 times: 6 times shifted
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// and in black for the shadow, and once in the right color and position.
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// This way we achieve the exact look as the original CMI had. However,
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// the question remains whether they did it this way, too, or if there is
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// some "font shadow" resource we don't know yet.
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// One problem remains: the fonts on the save/load screen don't have a
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// shadow. So how do we know whether to draw text with or without shadow?
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int offsetX[7] = { -1, 0, 1, 0, 1, 2, 0 };
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int offsetY[7] = { 0, -1, 0, 1, 2, 1, 0 };
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int cTable[7] = { 0, 0, 0, 0, 0, 0, color };
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for (int i = 0; i < 7; i++) {
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x += offsetX[i];
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y += offsetY[i];
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color = cTable[i];
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dst = _vm->virtscr[0].screenPtr + y * _vm->_screenWidth + x + _vm->virtscr[0].xstart;
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if (useMask)
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mask = _vm->getMaskBuffer(x, y, 0);
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if (c >= 256 && _vm->_CJKMode)
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draw2byte(dst, mask, c, x, y, color);
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else
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drawChar(dst, mask, (byte)c, x, y, color);
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x -= offsetX[i];
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y -= offsetY[i];
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}
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}
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void NutRenderer::drawChar(byte *dst, byte *mask, byte c, int x, int y, byte color) {
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const int width = _chars[c].width;
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const int height = _chars[c].height;
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const byte *src = _chars[c].src;
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byte bits = 0;
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byte maskmask;
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int maskpos;
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for (int ty = 0; ty < height; ty++) {
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maskmask = revBitMask[x & 7];
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maskpos = 0;
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for (int tx = 0; tx < width; tx++) {
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bits = *src++;
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if (x + tx < 0 || x + tx >= _vm->_screenWidth || y + ty < 0 || y + ty >= _vm->_screenHeight)
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continue;
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if (bits != 0) {
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dst[tx] = color;
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if (mask)
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mask[maskpos] |= maskmask;
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}
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maskmask >>= 1;
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if (maskmask == 0) {
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maskmask = 0x80;
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maskpos++;
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}
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}
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dst += _vm->_screenWidth;
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if (mask)
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mask += _vm->gdi._numStrips;
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}
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}
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void NutRenderer::draw2byte(byte *dst, byte *mask, int c, int x, int y, byte color) {
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if (!_loaded) {
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debug(2, "NutRenderer::draw2byte() Font is not loaded");
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return;
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}
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int width = _vm->_2byteWidth;
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int height = _vm->_2byteHeight;
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byte *src = _vm->get2byteCharPtr(c);
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byte bits = 0;
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byte maskmask;
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int maskpos;
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for (int ty = 0; ty < height; ty++) {
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maskmask = revBitMask[x & 7];
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maskpos = 0;
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for (int tx = 0; tx < width; tx++) {
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if ((tx % 8) == 0)
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bits = *src++;
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if (x + tx < 0 || x + tx >= _vm->_screenWidth || y + ty < 0 || y + ty >= _vm->_screenHeight)
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continue;
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if (bits & revBitMask[tx % 8]) {
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dst[tx] = color;
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if (mask) {
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mask[maskpos] |= maskmask;
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}
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}
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maskmask >>= 1;
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if (maskmask == 0) {
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maskmask = 0x80;
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maskpos++;
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}
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}
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dst += _vm->_screenWidth;
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if (mask)
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mask += _vm->gdi._numStrips;
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}
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}
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