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/* ScummVM - Scumm Interpreter
* Copyright (C) 2001/2002 The ScummVM project
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*/
#include "stdafx.h"
#include "scumm.h"
#include "nut_renderer.h"
NutRenderer::NutRenderer(Scumm *vm) {
_vm = vm;
_initialized = false;
_loaded = false;
_dataSrc = NULL;
}
NutRenderer::~NutRenderer() {
if (_dataSrc != NULL)
free(_dataSrc);
}
void NutRenderer::decodeCodec44(byte *dst, byte *src, uint32 length) {
byte val;
uint16 size_line;
uint16 num;
do {
size_line = READ_LE_UINT16(src);
src += 2;
length -= 2;
while (size_line != 0) {
num = *src++;
val = *src++;
memset(dst, val, num);
dst += num;
length -= 2;
size_line -= 2;
if (size_line == 0) break;
num = READ_LE_UINT16(src) + 1;
src += 2;
memcpy(dst, src, num);
dst += num;
src += num;
length -= num + 2;
size_line -= num + 2;
}
dst--;
} while (length > 1);
}
bool NutRenderer::loadFont(const char *filename, const char *dir) {
debug(2, "NutRenderer::loadFont() called");
if (_loaded == true) {
debug(2, "NutRenderer::loadFont() Font already loaded, ok, loading...");
}
File file;
file.open(filename, dir);
if (file.isOpen() == false) {
error("NutRenderer::loadFont() Can't open font file: %s/%s", dir, filename);
return false;
}
uint32 tag = file.readUint32BE();
if (tag != 'ANIM') {
debug(2, "NutRenderer::loadFont() there is no ANIM chunk in font header");
return false;
}
if (_dataSrc != NULL)
free(_dataSrc);
uint32 length = file.readUint32BE();
_dataSrc = (byte *)malloc(length);
file.read(_dataSrc, length);
file.close();
if (READ_BE_UINT32(_dataSrc) != 'AHDR') {
debug(2, "NutRenderer::loadFont() there is no AHDR chunk in font header");
free(_dataSrc);
return false;
}
int32 l;
uint32 offset = READ_BE_UINT32(_dataSrc + 4) + 8;
for (l = 0; l < 256; l++) {
if (READ_BE_UINT32(_dataSrc + offset) == 'FRME') {
offset += 8;
if (READ_BE_UINT32(_dataSrc + offset) == 'FOBJ') {
_offsets[l] = offset + 8;
offset += READ_BE_UINT32(_dataSrc + offset + 4) + 8;
}
else {
debug(2, "NutRenderer::loadFont() there is no FRME chunk");
free(_dataSrc);
return false;
}
}
else {
debug(2, "NutRenderer::loadFont() there is no FOBJ chunk in FRME chunk");
free(_dataSrc);
return false;
}
}
_loaded = true;
return true;
}
int32 NutRenderer::getCharWidth(char c) {
debug(2, "NutRenderer::getCharWidth() called");
if (_loaded == false) {
debug(2, "NutRenderer::getCharWidth() Font is not loaded");
return 0;
}
return READ_LE_UINT16(_dataSrc + _offsets[c] + 6);
}
int32 NutRenderer::getCharHeight(char c) {
debug(2, "NutRenderer::getCharHeight() called");
if (_loaded == false) {
debug(2, "NutRenderer::getCharHeight() Font is not loaded");
return 0;
}
return READ_LE_UINT16(_dataSrc + _offsets[c] + 8);
}
int32 NutRenderer::getStringWidth(char *string) {
debug(2, "NutRenderer::getStringWidth() called");
if (_loaded == false) {
debug(2, "NutRenderer::getStringWidth() Font is not loaded");
return 0;
}
int32 length = 0;
int32 l = 0;
do {
length += getCharWidth(string[l]);
l++;
} while (string[l] != 0);
return length;
}
void NutRenderer::drawString(const char *string, int32 x, int32 y, byte color, int32 mode) {
debug(2, "NutRenderer::drawString() called");
if (_loaded == false) {
debug(2, "NutRenderer::drawString() Font is not loaded");
return;
}
int l = 0;
int left = x;
int height = 0, tmp;
do {
if ((x < 0) || (y < 0) || (x > _vm->_realWidth) || (y > _vm->_realHeight)) {
debug(2, "NutRenderer::drawString() position x, y out of range");
return;
}
drawChar(string[l], x, y, color);
x += getCharWidth(string[l]);
tmp = getCharHeight(string[l]);
if (height < tmp)
height = tmp;
l++;
} while (string[l] != 0);
_vm->updateDirtyRect(0, left, x, y, y + height, 0);
}
void NutRenderer::drawChar(char c, int32 x, int32 y, byte color) {
debug(2, "NutRenderer::drawChar('%c', %d, %d, %d) called", c, x, y, (int)color);
if (_loaded == false) {
debug(2, "NutRenderer::drawChar() Font is not loaded");
return;
}
byte * src = (byte*)(_dataSrc + _offsets[c] + 14);
byte * dst = _vm->virtscr[0].screenPtr + y * _vm->_realWidth + x + _vm->virtscr[0].xstart;
byte *mask = _vm->getResourceAddress(rtBuffer, 9)
+ (y * _vm->_realWidth + x) / 8 + _vm->_screenStartStrip;
byte maskmask;
int maskpos;
uint32 length = READ_BE_UINT32(_dataSrc + _offsets[c] - 4) - 14;
decodeCodec44(_tmpCodecBuffer, src, length);
src = _tmpCodecBuffer;
int32 width = READ_LE_UINT16(_dataSrc + _offsets[c] + 6);
int32 height = READ_LE_UINT16(_dataSrc + _offsets[c] + 8);
for (int32 ty = 0; ty < height; ty++) {
maskmask = revBitMask[x & 7];
maskpos = 0;
for (int32 tx = 0; tx < width; tx++) {
byte pixel = *src++;
#if 1
// FIXME: This way, at least the actor speech colors are done right.
// However, we still don't draw any "shadows" behind the text, and indeed
// the character data doesn't seem to contain it. So how does CMI draw the
// font shadows? Either they are stored seperatly and we have to render them
// in addition to the normal font. Or maybe the created the shadows dynamically
// on the fly: if we draw the character several times in black, moved a bit
// each time, that would mostly create the shadow effect. But why would they
// do this, as it would increase the char drawing time by factor 5-6 ? And in
// fact, even then the shadow would not be 100% right.
if (pixel != 0) {
mask[maskpos] |= maskmask;
dst[tx] = color;
}
#else
if (pixel != 0) {
if (pixel == 0x01)
pixel = (color == 0) ? 0xf : color;
if (pixel == 0xff)
pixel = 0x0;
dst[tx] = pixel;
}
#endif
maskmask >>= 1;
if (maskmask == 0) {
maskmask = 0x80;
maskpos++;
}
}
dst += _vm->_realWidth;
mask += _vm->gdi._numStrips;
}
}
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