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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "common/endian.h"
#include "graphics/primitives.h"
#include "gob/driver_vga.h"
namespace Gob {
static void plotPixel(int x, int y, int color, void *data) {
SurfaceDesc *dest = (SurfaceDesc *)data;
if ((x >= 0) && (x < dest->getWidth()) &&
(y >= 0) && (y < dest->getHeight()))
dest->getVidMem()[(y * dest->getWidth()) + x] = color;
}
void VGAVideoDriver::putPixel(int16 x, int16 y, byte color, SurfaceDesc *dest) {
if ((x >= 0) && (x < dest->getWidth()) &&
(y >= 0) && (y < dest->getHeight()))
dest->getVidMem()[(y * dest->getWidth()) + x] = color;
}
void VGAVideoDriver::drawLine(SurfaceDesc *dest, int16 x0, int16 y0, int16 x1,
int16 y1, byte color) {
Graphics::drawLine(x0, y0, x1, y1, color, &plotPixel, dest);
}
void VGAVideoDriver::fillRect(SurfaceDesc *dest, int16 left, int16 top,
int16 right, int16 bottom, byte color) {
if ((left >= dest->getWidth()) || (right >= dest->getWidth()) ||
(top >= dest->getHeight()) || (bottom >= dest->getHeight()))
return;
byte *pos = dest->getVidMem() + (top * dest->getWidth()) + left;
int16 width = (right - left) + 1;
int16 height = (bottom - top) + 1;
while (height--) {
for (int16 i = 0; i < width; ++i)
pos[i] = color;
pos += dest->getWidth();
}
}
void VGAVideoDriver::drawLetter(unsigned char item, int16 x, int16 y,
Video::FontDesc *fontDesc, byte color1, byte color2,
byte transp, SurfaceDesc *dest) {
byte *src, *dst;
uint16 data;
src = fontDesc->dataPtr +
(item - fontDesc->startItem) * (fontDesc->itemSize & 0xFF);
dst = dest->getVidMem() + x + dest->getWidth() * y;
int nWidth = fontDesc->itemWidth;
if (nWidth & 7)
nWidth = (nWidth & 0xF8) + 8;
nWidth >>= 3;
for (int i = 0; i < fontDesc->itemHeight; i++) {
int width = fontDesc->itemWidth;
for (int k = 0; k < nWidth; k++) {
data = *src++;
for (int j = 0; j < MIN(8, width); j++) {
if (data & 0x80)
*dst = color2;
else if (color1 == 0)
*dst = transp;
dst++;
data <<= 1;
}
width -= 8;
}
dst += dest->getWidth() - fontDesc->itemWidth;
}
}
void VGAVideoDriver::drawSprite(SurfaceDesc *source, SurfaceDesc *dest,
int16 left, int16 top, int16 right, int16 bottom,
int16 x, int16 y, int16 transp) {
if ((x >= dest->getWidth()) || (x < 0) ||
(y >= dest->getHeight()) || (y < 0))
return;
int16 width = MIN((right - left) + 1, (int) dest->getWidth());
int16 height = MIN((bottom - top) + 1, (int) dest->getHeight());
if ((width < 1) || (height < 1))
return;
const byte *srcPos = source->getVidMem() + (top * source->getWidth()) + left;
byte *destPos = dest->getVidMem() + (y * dest->getWidth()) + x;
uint32 size = width * height;
if (transp) {
while (height--) {
for (int16 i = 0; i < width; ++i) {
if (srcPos[i])
destPos[i] = srcPos[i];
}
srcPos += source->getWidth();
destPos += dest->getWidth();
}
} else if (((srcPos >= destPos) && (srcPos <= (destPos + size))) ||
((destPos >= srcPos) && (destPos <= (srcPos + size)))) {
while (height--) {
memmove(destPos, srcPos, width);
srcPos += source->getWidth();
destPos += dest->getWidth();
}
} else {
while (height--) {
memcpy(destPos, srcPos, width);
srcPos += source->getWidth();
destPos += dest->getWidth();
}
}
}
void VGAVideoDriver::drawPackedSprite(byte *sprBuf, int16 width, int16 height,
int16 x, int16 y, byte transp, SurfaceDesc *dest) {
int destRight = x + width;
int destBottom = y + height;
byte *dst = dest->getVidMem() + x + dest->getWidth() * y;
int curx = x;
int cury = y;
while (1) {
uint8 val = *sprBuf++;
unsigned int repeat = val & 7;
val &= 0xF8;
if (!(val & 8)) {
repeat <<= 8;
repeat |= *sprBuf++;
}
repeat++;
val >>= 4;
for (unsigned int i = 0; i < repeat; ++i) {
if (curx < dest->getWidth() && cury < dest->getHeight())
if (!transp || val)
*dst = val;
dst++;
curx++;
if (curx == destRight) {
dst += dest->getWidth() + x - curx;
curx = x;
cury++;
if (cury == destBottom)
return;
}
}
}
}
}
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