mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-23 02:11:38 +00:00
422 lines
11 KiB
C++
422 lines
11 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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*
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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., 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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#include "scumm/scumm.h"
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#include "scumm/file.h"
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#include "scumm/nut_renderer.h"
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#include "scumm/util.h"
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namespace Scumm {
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NutRenderer::NutRenderer(ScummEngine *vm, const char *filename) :
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_vm(vm),
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_numChars(0),
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_maxCharSize(0),
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_charBuffer(0),
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_decodedData(0) {
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memset(_chars, 0, sizeof(_chars));
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loadFont(filename);
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}
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NutRenderer::~NutRenderer() {
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delete[] _charBuffer;
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delete[] _decodedData;
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}
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void smush_decode_codec1(byte *dst, const byte *src, int left, int top, int width, int height, int pitch);
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void NutRenderer::codec1(byte *dst, const byte *src, int width, int height, int pitch) {
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smush_decode_codec1(dst, src, 0, 0, width, height, pitch);
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for (int i = 0; i < width * height; i++)
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_paletteMap[dst[i]] = 1;
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}
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void NutRenderer::codec21(byte *dst, const byte *src, int width, int height, int pitch) {
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while (height--) {
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byte *dstPtrNext = dst + pitch;
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const byte *srcPtrNext = src + 2 + READ_LE_UINT16(src);
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src += 2;
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int len = width;
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do {
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int offs = READ_LE_UINT16(src); src += 2;
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dst += offs;
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len -= offs;
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if (len <= 0) {
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break;
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}
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int w = READ_LE_UINT16(src) + 1; src += 2;
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len -= w;
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if (len < 0) {
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w += len;
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}
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// the original codec44 handles this part slightly differently (this is the only difference with codec21) :
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// src bytes equal to 255 are replaced by 0 in dst
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// src bytes equal to 1 are replaced by a color passed as an argument in the original function
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// other src bytes values are copied as-is
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for (int i = 0; i < w; i++) {
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_paletteMap[src[i]] = 1;
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}
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memcpy(dst, src, w);
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dst += w;
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src += w;
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} while (len > 0);
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dst = dstPtrNext;
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src = srcPtrNext;
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}
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}
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void NutRenderer::loadFont(const char *filename) {
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ScummFile file;
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_vm->openFile(file, filename);
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if (!file.isOpen()) {
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error("NutRenderer::loadFont() Can't open font file: %s", filename);
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}
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uint32 tag = file.readUint32BE();
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if (tag != MKID_BE('ANIM')) {
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error("NutRenderer::loadFont() there is no ANIM chunk in font header");
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}
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uint32 length = file.readUint32BE();
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byte *dataSrc = new byte[length];
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file.read(dataSrc, length);
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file.close();
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if (READ_BE_UINT32(dataSrc) != MKID_BE('AHDR')) {
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error("NutRenderer::loadFont() there is no AHDR chunk in font header");
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}
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// We pre-decode the font, which may seem wasteful at first. Actually,
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// the memory needed for just the decoded glyphs is smaller than the
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// whole of the undecoded font file.
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_numChars = READ_LE_UINT16(dataSrc + 10);
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assert(_numChars <= ARRAYSIZE(_chars));
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uint32 offset = 0;
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uint32 decodedLength = 0;
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int l;
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_paletteMap = new byte[256];
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for (l = 0; l < 256; l++) {
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_paletteMap[l] = 0;
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}
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for (l = 0; l < _numChars; l++) {
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offset += READ_BE_UINT32(dataSrc + offset + 4) + 16;
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int width = READ_LE_UINT16(dataSrc + offset + 14);
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int height = READ_LE_UINT16(dataSrc + offset + 16);
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int size = width * height;
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decodedLength += size;
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if (size > _maxCharSize)
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_maxCharSize = size;
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}
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debug(1, "NutRenderer::loadFont('%s') - decodedLength = %d", filename, decodedLength);
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_decodedData = new byte[decodedLength];
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byte *decodedPtr = _decodedData;
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offset = 0;
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for (l = 0; l < _numChars; l++) {
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offset += READ_BE_UINT32(dataSrc + offset + 4) + 8;
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if (READ_BE_UINT32(dataSrc + offset) != MKID_BE('FRME')) {
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error("NutRenderer::loadFont(%s) there is no FRME chunk %d (offset %x)", filename, l, offset);
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break;
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}
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offset += 8;
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if (READ_BE_UINT32(dataSrc + offset) != MKID_BE('FOBJ')) {
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error("NutRenderer::loadFont(%s) there is no FOBJ chunk in FRME chunk %d (offset %x)", filename, l, offset);
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break;
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}
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int codec = READ_LE_UINT16(dataSrc + offset + 8);
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// _chars[l].xoffs = READ_LE_UINT16(dataSrc + offset + 10);
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// _chars[l].yoffs = READ_LE_UINT16(dataSrc + offset + 12);
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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 = decodedPtr;
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decodedPtr += (_chars[l].width * _chars[l].height);
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// If characters have transparency, then bytes just get skipped and
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// so there may appear some garbage. That's why we have to fill it
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// with a default color first.
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if (codec == 44) {
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memset(_chars[l].src, kSmush44TransparentColor, _chars[l].width * _chars[l].height);
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_paletteMap[kSmush44TransparentColor] = 1;
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_chars[l].transparency = kSmush44TransparentColor;
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} else {
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memset(_chars[l].src, kDefaultTransparentColor, _chars[l].width * _chars[l].height);
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_paletteMap[kDefaultTransparentColor] = 1;
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_chars[l].transparency = kDefaultTransparentColor;
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}
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const uint8 *fobjptr = dataSrc + offset + 22;
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switch (codec) {
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case 1:
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codec1(_chars[l].src, fobjptr, _chars[l].width, _chars[l].height, _chars[l].width);
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break;
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case 21:
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case 44:
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codec21(_chars[l].src, fobjptr, _chars[l].width, _chars[l].height, _chars[l].width);
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break;
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default:
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error("NutRenderer::loadFont: unknown codec: %d", codec);
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}
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}
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// We have decoded the font. Now let's see if we can re-compress it to
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// a more compact format. Start by counting the number of colors.
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int numColors = 0;
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for (l = 0; l < 256; l++) {
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if (_paletteMap[l]) {
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if (numColors < ARRAYSIZE(_palette)) {
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_paletteMap[l] = numColors;
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_palette[numColors] = l;
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}
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numColors++;
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}
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}
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// Now _palette contains all the used colors, and _paletteMap maps the
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// real color to the palette index.
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if (numColors <= 2)
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_bpp = 1;
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else if (numColors <= 4)
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_bpp = 2;
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else if (numColors <= 16)
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_bpp = 4;
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else
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_bpp = 8;
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if (_bpp < 8) {
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int compressedLength = 0;
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for (l = 0; l < 256; l++) {
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compressedLength += (((_bpp * _chars[l].width + 7) / 8) * _chars[l].height);
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}
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debug(1, "NutRenderer::loadFont('%s') - compressedLength = %d (%d bpp)", filename, compressedLength, _bpp);
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byte *compressedData = new byte[compressedLength];
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memset(compressedData, 0, compressedLength);
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offset = 0;
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for (l = 0; l < 256; l++) {
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byte *src = _chars[l].src;
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byte *dst = compressedData + offset;
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int srcPitch = _chars[l].width;
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int dstPitch = (_bpp * _chars[l].width + 7) / 8;
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for (int h = 0; h < _chars[l].height; h++) {
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byte bit = 0x80;
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byte *nextDst = dst + dstPitch;
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for (int w = 0; w < srcPitch; w++) {
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byte color = _paletteMap[src[w]];
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for (int i = 0; i < _bpp; i++) {
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if (color & (1 << i))
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*dst |= bit;
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bit >>= 1;
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}
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if (!bit) {
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bit = 0x80;
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dst++;
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}
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}
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src += srcPitch;
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dst = nextDst;
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}
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_chars[l].src = compressedData + offset;
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offset += (dstPitch * _chars[l].height);
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}
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delete[] _decodedData;
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_decodedData = compressedData;
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_charBuffer = new byte[_maxCharSize];
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}
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delete[] dataSrc;
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delete[] _paletteMap;
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}
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int NutRenderer::getCharWidth(byte c) const {
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if (c >= 0x80 && _vm->_useCJKMode)
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return _vm->_2byteWidth / 2;
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if (c >= _numChars)
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error("invalid character in NutRenderer::getCharWidth : %d (%d)", c, _numChars);
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return _chars[c].width;
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}
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int NutRenderer::getCharHeight(byte c) const {
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if (c >= 0x80 && _vm->_useCJKMode)
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return _vm->_2byteHeight;
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if (c >= _numChars)
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error("invalid character in NutRenderer::getCharHeight : %d (%d)", c, _numChars);
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return _chars[c].height;
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}
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byte *NutRenderer::unpackChar(byte c) {
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if (_bpp == 8)
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return _chars[c].src;
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byte *src = _chars[c].src;
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int pitch = (_bpp * _chars[c].width + 7) / 8;
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for (int ty = 0; ty < _chars[c].height; ty++) {
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for (int tx = 0; tx < _chars[c].width; tx++) {
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byte val;
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int offset;
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byte bit;
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switch (_bpp) {
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case 1:
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offset = tx / 8;
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bit = 0x80 >> (tx % 8);
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break;
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case 2:
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offset = tx / 4;
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bit = 0x80 >> (2 * (tx % 4));
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break;
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default:
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offset = tx / 2;
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bit = 0x80 >> (4 * (tx % 2));
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break;
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}
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val = 0;
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for (int i = 0; i < _bpp; i++) {
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if (src[offset] & (bit >> i))
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val |= (1 << i);
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}
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_charBuffer[ty * _chars[c].width + tx] = _palette[val];
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}
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src += pitch;
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}
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return _charBuffer;
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}
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void NutRenderer::drawFrame(byte *dst, int c, int x, int y) {
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const int width = MIN((int)_chars[c].width, _vm->_screenWidth - x);
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const int height = MIN((int)_chars[c].height, _vm->_screenHeight - y);
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const byte *src = unpackChar(c);
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const int srcPitch = _chars[c].width;
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byte bits = 0;
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const int minX = x < 0 ? -x : 0;
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const int minY = y < 0 ? -y : 0;
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if (height <= 0 || width <= 0) {
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return;
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}
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dst += _vm->_screenWidth * y + x;
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if (minY) {
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src += minY * srcPitch;
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dst += minY * _vm->_screenWidth;
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}
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for (int ty = minY; ty < height; ty++) {
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for (int tx = minX; tx < width; tx++) {
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bits = src[tx];
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if (bits != 231 && bits) {
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dst[tx] = bits;
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}
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}
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src += srcPitch;
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dst += _vm->_screenWidth;
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}
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}
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void NutRenderer::drawChar(const Graphics::Surface &s, byte c, int x, int y, byte color) {
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byte *dst = (byte *)s.pixels + y * s.pitch + x;
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const int width = MIN((int)_chars[c].width, s.w - x);
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const int height = MIN((int)_chars[c].height, s.h - y);
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const byte *src = unpackChar(c);
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int srcPitch = _chars[c].width;
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const int minX = x < 0 ? -x : 0;
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const int minY = y < 0 ? -y : 0;
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if (height <= 0 || width <= 0) {
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return;
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}
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if (minY) {
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src += minY * srcPitch;
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dst += minY * s.pitch;
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}
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for (int ty = minY; ty < height; ty++) {
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for (int tx = minX; tx < width; tx++) {
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if (src[tx] != _chars[c].transparency) {
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if (src[tx] == 1) {
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dst[tx] = color;
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} else {
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dst[tx] = src[tx];
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}
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}
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}
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src += srcPitch;
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dst += s.pitch;
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}
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}
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void NutRenderer::draw2byte(const Graphics::Surface &s, int c, int x, int y, byte color) {
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byte *dst = (byte *)s.pixels + y * s.pitch + x;
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const int width = _vm->_2byteWidth;
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const int height = MIN(_vm->_2byteHeight, s.h - y);
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const byte *src = _vm->get2byteCharPtr(c);
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byte bits = 0;
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if (height <= 0 || width <= 0) {
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return;
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}
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for (int ty = 0; ty < height; ty++) {
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for (int tx = 0; tx < width; tx++) {
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if ((tx & 7) == 0)
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bits = *src++;
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if (x + tx < 0 || x + tx >= s.w || y + ty < 0)
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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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}
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}
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dst += s.pitch;
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}
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}
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} // End of namespace Scumm
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