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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
 * 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: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-11-1/engines/saga/gfx.h $
 * $Id: gfx.h 30944 2008-02-23 22:50:18Z sev $

// Graphics maniuplation routines - private header file

#ifndef SAGA_GFX_H
#define SAGA_GFX_H

#include "graphics/surface.h"

namespace Saga {

using Common::Point;
using Common::Rect;

enum CursorType {

struct ClipData {
      // input members
      Rect sourceRect;
      Rect destRect;
      Point destPoint;

      // output members
      Point drawSource;
      Point drawDest;
      int drawWidth;
      int drawHeight;

      bool calcClip() {
            Common::Rect s;

            // Adjust the rect to draw to its screen coordinates
            s = sourceRect;
            s.left += destPoint.x;
            s.right += destPoint.x;
            s.top += destPoint.y;
            s.bottom += destPoint.y;


            if ((s.width() <= 0) || (s.height() <= 0)) {
                  return false;

            drawSource.x = s.left - sourceRect.left - destPoint.x;
            drawSource.y = s.top - sourceRect.top - destPoint.y;
            drawDest.x = s.left;
            drawDest.y = s.top;
            drawWidth = s.width();
            drawHeight = s.height();

            return true;

#include "common/pack-start.h"      // START STRUCT PACKING

struct PalEntry {
      byte red;
      byte green;
      byte blue;

#include "common/pack-end.h"  // END STRUCT PACKING

struct Color {
      int red;
      int green;
      int blue;
      int alpha;

struct Surface : Graphics::Surface {

      void transitionDissolve(const byte *sourceBuffer, const Common::Rect &sourceRect, int flags, double percent);
      void drawPalette();
      void drawPolyLine(const Point *points, int count, int color);
      void blit(const Common::Rect &destRect, const byte *sourceBuffer);

      void getRect(Common::Rect &rect) {
            rect.left = rect.top = 0;
            rect.right = w;
            rect.bottom = h;
      void drawFrame(const Common::Point &p1, const Common::Point &p2, int color) {
            Common::Rect rect(MIN(p1.x, p2.x), MIN(p1.y, p2.y), MAX(p1.x, p2.x) + 1, MAX(p1.y, p2.y) + 1);
            frameRect(rect, color);
      void drawRect(const Common::Rect &destRect, int color) {
            Common::Rect rect(w , h);

            if (rect.isValidRect()) {
                  fillRect(rect, color);

#define PAL_ENTRIES 256

#define CURSOR_W 7
#define CURSOR_H 7


bool hitTestPoly(const Point *points, unsigned int npoints, const Point& test_point);
class SagaEngine;

class Gfx {

      Gfx(SagaEngine *vm, OSystem *system, int width, int height);
      Surface *getBackBuffer() {
            return &_backBuffer;

      void initPalette();
      void setPalette(const PalEntry *pal, bool full = false);
      void setPaletteColor(int n, int r, int g, int b);
      void getCurrentPal(PalEntry *src_pal);
      void savePalette() { getCurrentPal(_savedPalette); }
      void restorePalette() { setPalette(_savedPalette, true); }
      void palToBlack(PalEntry *src_pal, double percent);
      void blackToPal(PalEntry *src_pal, double percent);
      void palFade(PalEntry *srcPal, int16 from, int16 to, int16 start, int16 numColors, double percent);
      void showCursor(bool state);
      void setCursor(CursorType cursorType = kCursorNormal);

      int _init;
      Surface _backBuffer;
      byte _currentPal[PAL_ENTRIES * 4];
      OSystem *_system;
      SagaEngine *_vm;

      PalEntry _globalPalette[PAL_ENTRIES];
      PalEntry _savedPalette[PAL_ENTRIES];

} // End of namespace Saga


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