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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.
*
*/
#include "common/endian.h"
#include "common/savefile.h"
#include "graphics/conversion.h"
#include "gob/gob.h"
#include "gob/video.h"
#include "gob/util.h"
#include "gob/draw.h"
#include "gob/global.h"
namespace Gob {
Video_v6::Video_v6(GobEngine *vm) : Video_v2(vm) {
}
char Video_v6::spriteUncompressor(byte *sprBuf, int16 srcWidth, int16 srcHeight,
int16 x, int16 y, int16 transp, Surface &destDesc) {
if ((sprBuf[0] == 1) && (sprBuf[1] == 3)) {
drawPacked(sprBuf, x, y, destDesc);
return 1;
}
if (srcWidth & 0xC000) {
warning("Playtoons Stub: srcWidth & 0xC000 == %04X", srcWidth & 0xC000);
srcWidth &= 0x3FFF;
}
if ((sprBuf[0] == 1) && (sprBuf[1] == 2)) {
if (Video_v2::spriteUncompressor(sprBuf, srcWidth, srcHeight, x, y, transp, destDesc))
return 1;
Video::drawPacked(sprBuf, srcWidth, srcHeight, x, y, transp, destDesc);
return 1;
}
warning("Urban Stub: spriteUncompressor(), sprBuf[0,1,2] = %d,%d,%d",
sprBuf[0], sprBuf[1], sprBuf[2]);
return 1;
}
void Video_v6::drawPacked(const byte *sprBuf, int16 x, int16 y, Surface &surfDesc) {
const byte *data = sprBuf + 2;
int16 width = READ_LE_UINT16(data);
int16 height = READ_LE_UINT16(data + 2);
data += 4;
const byte *srcData = data;
byte *uncBuf = 0;
if (*srcData++ != 0) {
uint32 size = READ_LE_UINT32(data);
uncBuf = new byte[size];
//spriteUncompressor(data, buf);
warning("Urban Stub: drawPacked: spriteUncompressor(data, uncBuf)");
srcData = uncBuf;
}
drawYUVData(srcData, surfDesc, width, height, x, y);
delete[] uncBuf;
}
void Video_v6::drawYUVData(const byte *srcData, Surface &destDesc,
int16 width, int16 height, int16 x, int16 y) {
int16 dataWidth = width;
int16 dataHeight = height;
if (dataWidth & 0xF)
dataWidth = (dataWidth & 0xFFF0) + 16;
if (dataHeight & 0xF)
dataHeight = (dataHeight & 0xFFF0) + 16;
const byte *dataY = srcData;
const byte *dataU = dataY + (dataWidth * dataHeight);
const byte *dataV = dataU + ((dataWidth * dataHeight) >> 4);
drawYUV(destDesc, x, y, dataWidth, dataHeight, width, height, dataY, dataU, dataV);
}
void Video_v6::drawYUV(Surface &destDesc, int16 x, int16 y,
int16 dataWidth, int16 dataHeight, int16 width, int16 height,
const byte *dataY, const byte *dataU, const byte *dataV) {
const Graphics::PixelFormat &pixelFormat = _vm->getPixelFormat();
if ((x + width - 1) >= destDesc.getWidth())
width = destDesc.getWidth() - x;
if ((y + height - 1) >= destDesc.getHeight())
height = destDesc.getHeight() - y;
Pixel dst = destDesc.get(x, y);
for (int i = 0; i < height; i++) {
Pixel dstRow = dst;
int nextChromaLine = (i < ((height - 1) & ~3) ) ? dataWidth : 0;
for (int j = 0; j < width; j++, dstRow++) {
int nextChromaColumn = (j < ((width - 1) & ~3)) ? 1 : 0;
// Get (7bit) Y data. It is at full res, does not need to be interpolated
byte dY = dataY[j] << 1;
// do linear interpolation on chroma values (7bits)
// to avoid blockiness
byte dU0 = dataU[j >> 2];
byte dV0 = dataV[j >> 2];
byte dU1 = dataU[(j >> 2) + nextChromaColumn];
byte dV1 = dataV[(j >> 2) + nextChromaColumn];
byte dU2 = dataU[(j + nextChromaLine) >> 2];
byte dV2 = dataV[(j + nextChromaLine) >> 2];
byte dU3 = dataU[((j + nextChromaLine) >> 2) + nextChromaColumn];
byte dV3 = dataV[((j + nextChromaLine) >> 2) + nextChromaColumn];
byte tX = j & 3;
byte tY = i & 3;
byte invtX = 4 - tX;
byte invtY = 4 - tY;
int16 dUX1 = dU0 * invtX + dU1 * tX;
int16 dUX2 = dU2 * invtX + dU3 * tX;
byte dU = (dUX1 * invtY + dUX2 * tY) >> 3;
int16 dVY1 = dV0 * invtX + dV1 * tX;
int16 dVY2 = dV2 * invtX + dV3 * tX;
byte dV = (dVY1 * invtY + dVY2 * tY) >> 3;
byte r, g, b;
Graphics::YUV2RGB(dY, dU, dV, r, g, b);
if (dY != 0) {
// Solid pixel
uint32 c = pixelFormat.RGBToColor(r, g, b);
// If the solid pixel's value is 0, we'll fudge it to 1
dstRow.set((c == 0) ? 1 : c);
} else
// Transparent pixel, we'll use pixel value 0
dstRow.set(0);
}
dst += destDesc.getWidth();
dataY += dataWidth;
if ((i & 3) == 3) {
// Next line of chroma data
dataU += dataWidth >> 2;
dataV += dataWidth >> 2;
}
}
}
} // End of namespace Gob
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