graphics/scaler.h

   1 /* ScummVM - Graphic Adventure Engine
   2  *
   3  * ScummVM is the legal property of its developers, whose names
   4  * are too numerous to list here. Please refer to the COPYRIGHT
   5  * file distributed with this source distribution.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  20  *
  21  * $URL$
  22  * $Id$
  23  */
  24
  25 #ifndef GRAPHICS_SCALER_H
  26 #define GRAPHICS_SCALER_H
  27
  28 #include "common/scummsys.h"
  29 #include "graphics/surface.h"
  30
  31 extern void InitScalers(uint32 BitFormat);
  32 extern void DestroyScalers();
  33
  34 typedef void ScalerProc(const uint8 *srcPtr, uint32 srcPitch,
  35                                                         uint8 *dstPtr, uint32 dstPitch, int width, int height);
  36
  37 #define DECLARE_SCALER(x)       \
  38         extern void x(const uint8 *srcPtr, uint32 srcPitch, uint8 *dstPtr, \
  39                                         uint32 dstPitch, int width, int height)
  40
  41 DECLARE_SCALER(_2xSaI);
  42 DECLARE_SCALER(Super2xSaI);
  43 DECLARE_SCALER(SuperEagle);
  44 DECLARE_SCALER(AdvMame2x);
  45 DECLARE_SCALER(AdvMame3x);
  46 DECLARE_SCALER(Normal1x);
  47 DECLARE_SCALER(Normal2x);
  48 #ifdef USE_ARM_SCALER_ASM
  49 DECLARE_SCALER(Normal2xAspect);
  50 #endif
  51 DECLARE_SCALER(Normal3x);
  52 DECLARE_SCALER(Normal1o5x);
  53 DECLARE_SCALER(TV2x);
  54 DECLARE_SCALER(DotMatrix);
  55
  56 #ifndef DISABLE_HQ_SCALERS
  57 DECLARE_SCALER(HQ2x);
  58 DECLARE_SCALER(HQ3x);
  59 #endif
  60
  61 FORCEINLINE int real2Aspect(int y) {
  62         return y + (y + 1) / 5;
  63 }
  64
  65 FORCEINLINE int aspect2Real(int y) {
  66         return (y * 5 + 4) / 6;
  67 }
  68
  69 extern void makeRectStretchable(int &x, int &y, int &w, int &h);
  70
  71 extern int stretch200To240(uint8 *buf, uint32 pitch, int width, int height, int srcX, int srcY, int origSrcY);
  72
  73 // creates a 160x100 thumbnail for 320x200 games
  74 // and 160x120 thumbnail for 320x240 and 640x480 games
  75 // only 565 mode
  76 enum {
  77         kThumbnailWidth = 160,
  78         kThumbnailHeight1 = 100,
  79         kThumbnailHeight2 = 120
  80 };
  81
  82 /**
  83  * Creates a thumbnail from the current screen (without overlay).
  84  *
  85  * @param surf  a surface (will always have 16 bpp after this for now)
  86  * @return              false if a error occured
  87  */
  88 extern bool createThumbnailFromScreen(Graphics::Surface *surf);
  89
  90 /**
  91  * Creates a thumbnail from a buffer.
  92  *
  93  * @param surf      destination surface (will always have 16 bpp after this for now)
  94  * @param pixels    raw pixel data
  95  * @param w         width
  96  * @param h         height
  97  * @param palette   palette in RGB format
  98  */
  99 extern bool createThumbnail(Graphics::Surface *surf, const uint8 *pixels, int w, int h, const uint8 *palette);
 100
 101 #endif