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surface.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2002-2005 The ScummVM project
 *
 * 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.
 *
 * $Header: /cvsroot/scummvm/scummvm/graphics/surface.cpp,v 1.9.2.1 2005/10/18 02:11:18 sev Exp $
 */

#include "common/stdafx.h"
#include "common/util.h"
#include "graphics/primitives.h"
#include "graphics/surface.h"

namespace Graphics {

static void plotPoint1(int x, int y, int color, void *data) {
      Surface *s = (Surface *)data;
      if (x >= 0 && x < s->w && y >= 0 && y < s->h) {
            byte *ptr = (byte *)s->getBasePtr(x, y);
            *ptr = (byte)color;
      }
}

static void plotPoint2(int x, int y, int color, void *data) {
      Surface *s = (Surface *)data;
      if (x >= 0 && x < s->w && y >= 0 && y < s->h) {
            uint16 *ptr = (uint16 *)s->getBasePtr(x, y);
            *ptr = (uint16)color;
      }
}

void Surface::drawLine(int x0, int y0, int x1, int y1, uint32 color) {
      if (bytesPerPixel == 1)
            Graphics::drawLine(x0, y0, x1, y1, color, &plotPoint1, this);
      else if (bytesPerPixel == 2)
            Graphics::drawLine(x0, y0, x1, y1, color, &plotPoint2, this);
      else
            error("Surface::drawLine: bytesPerPixel must be 1 or 2");
}

00053 void Surface::create(uint16 width, uint16 height, uint8 bytesPP) {
      free();

      w = width;
      h = height;
      bytesPerPixel = bytesPP;
      pitch = w * bytesPP;

      pixels = calloc(width * height, bytesPP);
      assert(pixels);
}

00065 void Surface::free() {
 	::free(pixels);
      pixels = 0;
      w = h = pitch = 0;
      bytesPerPixel = 0;
}

void Surface::hLine(int x, int y, int x2, uint32 color) {
      // Clipping
      if (y < 0 || y >= h)
            return;

      if (x2 < x)
            SWAP(x2, x);

      if (x < 0)
            x = 0;
      if (x2 >= w)
            x2 = w - 1;

      if (bytesPerPixel == 1) {
            byte *ptr = (byte *)getBasePtr(x, y);
            if (x2 >= x)
                  memset(ptr, (byte)color, x2-x+1);
      } else if (bytesPerPixel == 2) {
            uint16 *ptr = (uint16 *)getBasePtr(x, y);
            while (x++ <= x2) {
                  *ptr++ = (uint16)color;
            }
      } else {
            error("Surface::hLine: bytesPerPixel must be 1 or 2");
      }
}

void Surface::vLine(int x, int y, int y2, uint32 color) {
      // Clipping
      if (x < 0 || x >= w)
            return;

      if (y2 < y)
            SWAP(y2, y);

      if (y < 0)
            y = 0;
      if (y2 >= h)
            y2 = h - 1;

      if (bytesPerPixel == 1) {
            byte *ptr = (byte *)getBasePtr(x, y);
            while (y++ <= y2) {
                  *ptr = (byte)color;
                  ptr += pitch;
            }
      } else if (bytesPerPixel == 2) {
            uint16 *ptr = (uint16 *)getBasePtr(x, y);
            while (y++ <= y2) {
                  *ptr = (uint16)color;
                  ptr += pitch/2;
            }
      } else {
            error("Surface::vLine: bytesPerPixel must be 1 or 2");
      }
}

void Surface::fillRect(const Common::Rect &rOld, uint32 color) {
      Common::Rect r(rOld);
      r.clip(w, h);

      if (!r.isValidRect())
            return;

      int width = r.width();
      int height = r.height();
      int i;

      if (bytesPerPixel == 1) {
            byte *ptr = (byte *)getBasePtr(r.left, r.top);
            while (height--) {
                  memset(ptr, (byte)color, width);
                  ptr += pitch;
            }
      } else if (bytesPerPixel == 2) {
            uint16 *ptr = (uint16 *)getBasePtr(r.left, r.top);
            while (height--) {
                  for (i = 0; i < width; i++) {
                        ptr[i] = (uint16)color;
                  }
                  ptr += pitch/2;
            }
      } else {
            error("Surface::fillRect: bytesPerPixel must be 1 or 2");
      }
}

void Surface::frameRect(const Common::Rect &r, uint32 color) {
      hLine(r.left, r.top, r.right-1, color);
      hLine(r.left, r.bottom-1, r.right-1, color);
      vLine(r.left, r.top, r.bottom-1, color);
      vLine(r.right-1, r.top, r.bottom-1, color);
}

} // End of namespace Graphics

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