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404 lines
12 KiB
C++
404 lines
12 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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* 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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* 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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*/
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#include "graphics/scaler/intern.h"
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#include "graphics/scaler/scalebit.h"
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#include "common/util.h"
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#include "common/system.h"
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int gBitFormat = 565;
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#ifndef DISABLE_HQ_SCALERS
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// RGB-to-YUV lookup table
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extern "C" {
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#ifdef USE_NASM
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// NOTE: if your compiler uses different mangled names, add another
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// condition here
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#if !defined(_WIN32) && !defined(MACOSX) && !defined(__OS2__)
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#define RGBtoYUV _RGBtoYUV
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#define hqx_highbits _hqx_highbits
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#define hqx_lowbits _hqx_lowbits
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#define hqx_low2bits _hqx_low2bits
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#define hqx_low3bits _hqx_low3bits
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#define hqx_greenMask _hqx_greenMask
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#define hqx_redBlueMask _hqx_redBlueMask
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#define hqx_green_redBlue_Mask _hqx_green_redBlue_Mask
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#endif
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#endif
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uint32 hqx_highbits = 0xF7DEF7DE;
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uint32 hqx_lowbits = 0x0821;
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uint32 hqx_low2bits = 0x0C63;
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uint32 hqx_low3bits = 0x1CE7;
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uint32 hqx_greenMask = 0;
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uint32 hqx_redBlueMask = 0;
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uint32 hqx_green_redBlue_Mask = 0;
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// FIXME/TODO: The RGBtoYUV table sucks up 256 KB. This is bad.
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// In addition we never free it...
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//
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// Note: a memory lookup table is *not* necessarily faster than computing
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// these things on the fly, because of its size. The table together with
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// the code, plus the input/output GFX data, may not fit in the cache on some
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// systems, so main memory has to be accessed, which is about the worst thing
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// that can happen to code which tries to be fast...
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//
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// So we should think about ways to get this smaller / removed. Maybe we can
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// use the same technique employed by our MPEG code to reduce the size of the
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// lookup table at the cost of some additional computations?
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//
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// Of course, the above is largely a conjecture, and the actual speed
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// differences are likely to vary a lot between different architectures and
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// CPUs.
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uint32 *RGBtoYUV = 0;
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}
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void InitLUT(Graphics::PixelFormat format) {
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uint8 r, g, b;
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int Y, u, v;
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assert(format.bytesPerPixel == 2);
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// Allocate the YUV/LUT buffers on the fly if needed.
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if (RGBtoYUV == 0)
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RGBtoYUV = (uint32 *)malloc(65536 * sizeof(uint32));
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for (int color = 0; color < 65536; ++color) {
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format.colorToRGB(color, r, g, b);
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Y = (r + g + b) >> 2;
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u = 128 + ((r - b) >> 2);
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v = 128 + ((-r + 2 * g - b) >> 3);
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RGBtoYUV[color] = (Y << 16) | (u << 8) | v;
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}
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#ifdef USE_NASM
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hqx_lowbits = (1 << format.rShift) | (1 << format.gShift) | (1 << format.bShift),
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hqx_low2bits = (3 << format.rShift) | (3 << format.gShift) | (3 << format.bShift),
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hqx_low3bits = (7 << format.rShift) | (7 << format.gShift) | (7 << format.bShift),
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hqx_highbits = format.RGBToColor(255,255,255) ^ hqx_lowbits;
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// FIXME: The following code only does the right thing
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// if the color order is RGB or BGR, i.e., green is in the middle.
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hqx_greenMask = format.RGBToColor(0,255,0);
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hqx_redBlueMask = format.RGBToColor(255,0,255);
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hqx_green_redBlue_Mask = (hqx_greenMask << 16) | hqx_redBlueMask;
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#endif
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}
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#endif
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/** Lookup table for the DotMatrix scaler. */
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uint16 g_dotmatrix[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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/** Init the scaler subsystem. */
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void InitScalers(uint32 BitFormat) {
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gBitFormat = BitFormat;
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// FIXME: The pixelformat should be param to this function, not the bitformat.
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// Until then, determine the pixelformat in other ways. Unfortunately,
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// calling OSystem::getOverlayFormat() here might not be safe on all ports.
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Graphics::PixelFormat format;
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if (gBitFormat == 555) {
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format = Graphics::createPixelFormat<555>();
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} else if (gBitFormat == 565) {
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format = Graphics::createPixelFormat<565>();
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} else {
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assert(g_system);
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format = g_system->getOverlayFormat();
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}
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#ifndef DISABLE_HQ_SCALERS
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InitLUT(format);
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#endif
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// Build dotmatrix lookup table for the DotMatrix scaler.
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g_dotmatrix[0] = g_dotmatrix[10] = format.RGBToColor(0, 63, 0);
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g_dotmatrix[1] = g_dotmatrix[11] = format.RGBToColor(0, 0, 63);
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g_dotmatrix[2] = g_dotmatrix[8] = format.RGBToColor(63, 0, 0);
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g_dotmatrix[4] = g_dotmatrix[6] =
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g_dotmatrix[12] = g_dotmatrix[14] = format.RGBToColor(63, 63, 63);
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}
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void DestroyScalers(){
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#ifndef DISABLE_HQ_SCALERS
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free(RGBtoYUV);
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RGBtoYUV = 0;
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#endif
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}
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/**
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* Trivial 'scaler' - in fact it doesn't do any scaling but just copies the
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* source to the destination.
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*/
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void Normal1x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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// Spot the case when it can all be done in 1 hit
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if ((srcPitch == sizeof(OverlayColor) * (uint)width) && (dstPitch == sizeof(OverlayColor) * (uint)width)) {
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memcpy(dstPtr, srcPtr, sizeof(OverlayColor) * width * height);
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return;
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}
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while (height--) {
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memcpy(dstPtr, srcPtr, sizeof(OverlayColor) * width);
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srcPtr += srcPitch;
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dstPtr += dstPitch;
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}
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}
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#ifndef DISABLE_SCALERS
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#ifdef USE_ARM_SCALER_ASM
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extern "C" void Normal2xAspectMask(const uint8 *srcPtr,
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uint32 srcPitch,
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uint8 *dstPtr,
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uint32 dstPitch,
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int width,
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int height,
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uint32 mask);
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void Normal2xAspect(const uint8 *srcPtr,
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uint32 srcPitch,
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uint8 *dstPtr,
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uint32 dstPitch,
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int width,
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int height) {
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if (gBitFormat == 565) {
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Normal2xAspectMask(srcPtr,
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srcPitch,
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dstPtr,
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dstPitch,
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width,
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height,
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0x07e0F81F);
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} else {
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Normal2xAspectMask(srcPtr,
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srcPitch,
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dstPtr,
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dstPitch,
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width,
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height,
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0x03e07C1F);
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}
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}
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extern "C" void Normal2xARM(const uint8 *srcPtr,
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uint32 srcPitch,
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uint8 *dstPtr,
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uint32 dstPitch,
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int width,
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int height);
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void Normal2x(const uint8 *srcPtr,
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uint32 srcPitch,
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uint8 *dstPtr,
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uint32 dstPitch,
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int width,
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int height) {
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Normal2xARM(srcPtr, srcPitch, dstPtr, dstPitch, width, height);
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}
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#else
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/**
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* Trivial nearest-neighbour 2x scaler.
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*/
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void Normal2x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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uint8 *r;
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assert(IS_ALIGNED(dstPtr, 4));
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assert(sizeof(OverlayColor) == 2);
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while (height--) {
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r = dstPtr;
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for (int i = 0; i < width; ++i, r += 4) {
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uint32 color = *(((const OverlayColor *)srcPtr) + i);
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color |= color << 16;
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*(uint32 *)(r) = color;
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*(uint32 *)(r + dstPitch) = color;
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}
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srcPtr += srcPitch;
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dstPtr += dstPitch << 1;
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}
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}
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#endif
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/**
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* Trivial nearest-neighbour 3x scaler.
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*/
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void Normal3x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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uint8 *r;
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const uint32 dstPitch2 = dstPitch * 2;
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const uint32 dstPitch3 = dstPitch * 3;
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assert(IS_ALIGNED(dstPtr, 2));
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while (height--) {
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r = dstPtr;
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for (int i = 0; i < width; ++i, r += 6) {
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uint16 color = *(((const uint16 *)srcPtr) + i);
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*(uint16 *)(r + 0) = color;
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*(uint16 *)(r + 2) = color;
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*(uint16 *)(r + 4) = color;
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*(uint16 *)(r + 0 + dstPitch) = color;
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*(uint16 *)(r + 2 + dstPitch) = color;
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*(uint16 *)(r + 4 + dstPitch) = color;
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*(uint16 *)(r + 0 + dstPitch2) = color;
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*(uint16 *)(r + 2 + dstPitch2) = color;
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*(uint16 *)(r + 4 + dstPitch2) = color;
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}
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srcPtr += srcPitch;
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dstPtr += dstPitch3;
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}
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}
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#define interpolate_1_1 interpolate16_1_1<Graphics::ColorMasks<bitFormat> >
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#define interpolate_1_1_1_1 interpolate16_1_1_1_1<Graphics::ColorMasks<bitFormat> >
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/**
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* Trivial nearest-neighbour 1.5x scaler.
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*/
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template<int bitFormat>
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void Normal1o5xTemplate(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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uint8 *r;
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const uint32 dstPitch2 = dstPitch * 2;
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const uint32 dstPitch3 = dstPitch * 3;
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const uint32 srcPitch2 = srcPitch * 2;
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assert(IS_ALIGNED(dstPtr, 2));
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while (height > 0) {
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r = dstPtr;
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for (int i = 0; i < width; i += 2, r += 6) {
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uint16 color0 = *(((const uint16 *)srcPtr) + i);
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uint16 color1 = *(((const uint16 *)srcPtr) + i + 1);
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uint16 color2 = *(((const uint16 *)(srcPtr + srcPitch)) + i);
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uint16 color3 = *(((const uint16 *)(srcPtr + srcPitch)) + i + 1);
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*(uint16 *)(r + 0) = color0;
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*(uint16 *)(r + 2) = interpolate_1_1(color0, color1);
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*(uint16 *)(r + 4) = color1;
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*(uint16 *)(r + 0 + dstPitch) = interpolate_1_1(color0, color2);
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*(uint16 *)(r + 2 + dstPitch) = interpolate_1_1_1_1(color0, color1, color2, color3);
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*(uint16 *)(r + 4 + dstPitch) = interpolate_1_1(color1, color3);
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*(uint16 *)(r + 0 + dstPitch2) = color2;
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*(uint16 *)(r + 2 + dstPitch2) = interpolate_1_1(color2, color3);
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*(uint16 *)(r + 4 + dstPitch2) = color3;
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}
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srcPtr += srcPitch2;
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dstPtr += dstPitch3;
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height -= 2;
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}
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}
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MAKE_WRAPPER(Normal1o5x)
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/**
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* The Scale2x filter, also known as AdvMame2x.
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* See also http://scale2x.sourceforge.net
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*/
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void AdvMame2x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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scale(2, dstPtr, dstPitch, srcPtr - srcPitch, srcPitch, 2, width, height);
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}
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/**
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* The Scale3x filter, also known as AdvMame3x.
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* See also http://scale2x.sourceforge.net
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*/
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void AdvMame3x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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scale(3, dstPtr, dstPitch, srcPtr - srcPitch, srcPitch, 2, width, height);
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}
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template<int bitFormat>
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void TV2xTemplate(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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const uint32 nextlineSrc = srcPitch / sizeof(uint16);
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const uint16 *p = (const uint16 *)srcPtr;
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const uint32 nextlineDst = dstPitch / sizeof(uint16);
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uint16 *q = (uint16 *)dstPtr;
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while (height--) {
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for (int i = 0, j = 0; i < width; ++i, j += 2) {
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uint16 p1 = *(p + i);
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uint32 pi;
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pi = (((p1 & redblueMask) * 7) >> 3) & redblueMask;
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pi |= (((p1 & greenMask) * 7) >> 3) & greenMask;
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*(q + j) = p1;
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*(q + j + 1) = p1;
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*(q + j + nextlineDst) = (uint16)pi;
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*(q + j + nextlineDst + 1) = (uint16)pi;
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}
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p += nextlineSrc;
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q += nextlineDst << 1;
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}
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}
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MAKE_WRAPPER(TV2x)
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static inline uint16 DOT_16(const uint16 *dotmatrix, uint16 c, int j, int i) {
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return c - ((c >> 2) & dotmatrix[((j & 3) << 2) + (i & 3)]);
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}
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// FIXME: This scaler doesn't quite work. Either it needs to know where on the
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// screen it's drawing, or the dirty rects will have to be adjusted so that
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// access to the dotmatrix array are made in a consistent way. (Doing that in
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// a way that also works together with aspect-ratio correction is left as an
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// exercise for the reader.)
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void DotMatrix(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, uint32 dstPitch,
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int width, int height) {
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const uint16 *dotmatrix = g_dotmatrix;
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const uint32 nextlineSrc = srcPitch / sizeof(uint16);
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const uint16 *p = (const uint16 *)srcPtr;
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const uint32 nextlineDst = dstPitch / sizeof(uint16);
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uint16 *q = (uint16 *)dstPtr;
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for (int j = 0, jj = 0; j < height; ++j, jj += 2) {
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for (int i = 0, ii = 0; i < width; ++i, ii += 2) {
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uint16 c = *(p + i);
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*(q + ii) = DOT_16(dotmatrix, c, jj, ii);
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*(q + ii + 1) = DOT_16(dotmatrix, c, jj, ii + 1);
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*(q + ii + nextlineDst) = DOT_16(dotmatrix, c, jj + 1, ii);
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*(q + ii + nextlineDst + 1) = DOT_16(dotmatrix, c, jj + 1, ii + 1);
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}
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p += nextlineSrc;
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q += nextlineDst << 1;
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}
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}
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#endif
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