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IMG_PixmapRGBA32.cpp

/**
 * $Id: IMG_PixmapRGBA32.cpp,v 1.4 2002/11/25 09:53:03 mein Exp $
 * ***** BEGIN GPL/BL DUAL LICENSE BLOCK *****
 *
 * 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. The Blender
 * Foundation also sells licenses for use in proprietary software under
 * the Blender License.  See http://www.blender.org/BL/ for information
 * about this.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL/BL DUAL LICENSE BLOCK *****
 */

/**

 * $Id: IMG_PixmapRGBA32.cpp,v 1.4 2002/11/25 09:53:03 mein Exp $
 * Copyright (C) 2001 NaN Technologies B.V.
 * Base class for pixmaps.
 * @author  Maarten Gribnau
 * @date    March 6, 2001
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "IMG_PixmapRGBA32.h"

00047 IMG_PixmapRGBA32::IMG_PixmapRGBA32(GEN_TUns32 width, GEN_TUns32 height)
      : IMG_Pixmap(), m_pixels(width * height)
{
      m_pixelsBase = m_pixels;
      m_width = width;
      m_height = height;
      m_rowBytes = width * sizeof(TPixelRGBA32);
      m_pixelSize = 32;
      m_pixelType = kPixelTypeRGBA32;
}


00059 IMG_PixmapRGBA32::IMG_PixmapRGBA32(void* image, GEN_TUns32 width, GEN_TUns32 height, GEN_TUns32 rowBytes)
      : IMG_Pixmap(), m_pixels(image, width * rowBytes)
{
      m_pixelsBase = m_pixels;
      m_width = width;
      m_height = height;
      m_rowBytes = rowBytes;
      m_pixelSize = 32;
      m_pixelType = kPixelTypeRGBA32;
}


00071 void IMG_PixmapRGBA32::fillRect(const GEN_Rect& r, const IMG_ColorRGB& c)
{
      GEN_Rect t_bnds (0, 0, m_width, m_height); /* Bounds of this pixmap */
      GEN_Rect r_bnds (r);                /* Area to set */

      /* Determine visibility */
      GEN_TVisibility v = t_bnds.getVisibility(r_bnds);
      if (v == GEN_kNotVisible) return;
      if (v == GEN_kPartiallyVisible) {
            /* Clip the destination rectangle to the bounds of this pixmap
            */
            t_bnds.clip(r_bnds);
            if (r_bnds.isEmpty()) {
                  return;
            }
      }

#if 0
      /* Set new pixels using shifting */
      /* Prepare the pixel value to set */
      IMG_ColorRGBA ca (c);
      TPixelRGBA32 pv = getPixelValue(c);
      /* Mask off the alpha bits */
      pv &= 0x00FFFFFF; /* 0xFFFFFF00; */

      /* Set the pixels in the destination rectangle */
      for (GEN_TInt32 y = r.m_t; y < r.m_b; y++) {
            /* Park pixel pointer at the start pixels */
            TPixelPtr desPtr = getPixelPtr(r_bnds.m_l, y);
            for (GEN_TInt32 x = r.m_l; x < r.m_r; x++) {
                  /* Set the new pixel value (retain current alpha) */
                  *(desPtr++) = pv | ((*desPtr) & 0xFF000000); /*0x000000FF); */
            }
      }
#else
      /* Set new values using byte indexing */
      /*IMG_ColorRGBA ca (c); */
      TPixelRGBA32 src = getPixelValue(c);
      TPixelPtr desPtr;
      GEN_TUns8* srcBytes = (GEN_TUns8*) &src;
      
      /* Set the pixels in the destination rectangle */
      for (GEN_TInt32 y = r.m_t; y < r.m_b; y++) {
            /* Park pixel pointer at the start pixels */
            desPtr = getPixelPtr(r_bnds.m_l, y);
            for (GEN_TInt32 x = r.m_l; x < r.m_r; x++) {
                  /* Set the new pixel value (retain current alpha) */
                  ((GEN_TUns8*)desPtr)[bi_r] = srcBytes[bi_r];
                  ((GEN_TUns8*)desPtr)[bi_g] = srcBytes[bi_g];
                  ((GEN_TUns8*)desPtr)[bi_b] = srcBytes[bi_b];
                  desPtr++;
            }
      }
#endif
}


00128 void IMG_PixmapRGBA32::fillRect(const GEN_Rect& r, const IMG_ColorRGBA& c)
{
      GEN_Rect t_bnds (0, 0, m_width, m_height); /* Bounds of this pixmap */
      GEN_Rect r_bnds (r);                /* Area to set */

      /* Determine visibility */
      GEN_TVisibility v = t_bnds.getVisibility(r_bnds);
      if (v == GEN_kNotVisible) return;
      if (v == GEN_kPartiallyVisible) {
            /* Clip the destination rectangle to the bounds of this pixmap
            */
            t_bnds.clip(r_bnds);
            if (r_bnds.isEmpty()) {
                  return;
            }
      }

      /* Set the pixels in the destination rectangle */
      TPixelRGBA32 pixel = getPixelValue(c);
      for (GEN_TInt32 y = r.m_t; y < r.m_b; y++) {
            /* Park pixel pointer at the start pixels */
            TPixelPtr desPtr = getPixelPtr(r_bnds.m_l, y);
            for (GEN_TInt32 x = r.m_l; x < r.m_r; x++) {
                  *(desPtr++) = pixel;
            }
      }
}


00157 void IMG_PixmapRGBA32::setPixmap(const IMG_PixmapRGBA32& src, const GEN_Rect& srcBnds, const GEN_Rect& destBnds)
{
      GEN_Rect i_bnds (srcBnds);    /* Bounds of input pixmap */
      GEN_Rect t_bnds (0, 0, m_width, m_height); /* Bounds of this pixmap */
      GEN_Rect p_bnds (destBnds);   /* Bounds of the paste area */
      
      /* The next check could be removed if the caller is made 
            responsible for handing us non-empty rectangles */
      if (i_bnds.isEmpty()) {
            /* Nothing to do */
            return;
      }

      /* Determine visibility of the paste area */
      GEN_TVisibility v = t_bnds.getVisibility(p_bnds);
      if (v == GEN_kNotVisible) return;
      if (v == GEN_kPartiallyVisible) {
            /* Clipping is needed */
            if (p_bnds.m_l < 0) {
                  i_bnds.m_l += -p_bnds.m_l;
                  p_bnds.m_l = 0;
            }
            if (p_bnds.m_t < 0) {
                  i_bnds.m_t += -p_bnds.m_t;
                  p_bnds.m_t = 0;
            }
            GEN_TInt32 d = t_bnds.getWidth();
            if (p_bnds.m_r > d) {
                  i_bnds.m_r -= d - p_bnds.m_r;
                  p_bnds.m_r = d;
            }
            d = t_bnds.getHeight();
            if (p_bnds.m_b > d) {
                  i_bnds.m_b -= d - p_bnds.m_b;
                  p_bnds.m_b = d;
            }
      }

      /* Iterate through the rows */
      for (GEN_TInt32 r = 0; r < p_bnds.getHeight(); r++) {
            /* Park pixel pointers at the start pixels */
            TPixelPtr srcPtr = src.getPixelPtr(i_bnds.m_l, i_bnds.m_t + r);
            TPixelPtr desPtr = getPixelPtr(p_bnds.m_l, p_bnds.m_t + r);
            /* Iterate through the columns */
            for (int c = 0; c < p_bnds.getWidth(); c++) {
                  *(desPtr++) = *(srcPtr++);
            }
      }
}


00208 void IMG_PixmapRGBA32::blendPixmap(const IMG_PixmapRGBA32& src, const GEN_Rect& srcBnds, const GEN_Rect& destBnds)
{
      GEN_Rect i_bnds (srcBnds);    /* Bounds of input pixmap */
      GEN_Rect t_bnds (0, 0, m_width, m_height); /* Bounds of this pixmap */
      GEN_Rect p_bnds (destBnds);   /* Bounds of the paste area */
      
      /* The next check could be removed if the caller is made responsible 
            for handing us non-empty rectangles */
      if (i_bnds.isEmpty()) {
            /* Nothing to do */
            return;
      }

      /* Determine visibility of the paste area */
      GEN_TVisibility v = t_bnds.getVisibility(p_bnds);
      if (v == GEN_kNotVisible) return;
      if (v == GEN_kPartiallyVisible) {
            /* Clipping is needed */
            if (p_bnds.m_l < 0) {
                  i_bnds.m_l += -p_bnds.m_l;
                  p_bnds.m_l = 0;
            }
            if (p_bnds.m_t < 0) {
                  i_bnds.m_t += -p_bnds.m_t;
                  p_bnds.m_t = 0;
            }
            GEN_TInt32 d = t_bnds.getWidth();
            if (p_bnds.m_r > d) {
                  i_bnds.m_r -= p_bnds.m_r - d;
                  p_bnds.m_r = d;
            }
            d = t_bnds.getHeight();
            if (p_bnds.m_b > d) {
                  i_bnds.m_b -= p_bnds.m_b - d;
                  p_bnds.m_b = d;
            }
      }

      IMG_ColorRGBA srcColor;
      IMG_ColorRGBA desColor;

      /* Iterate through the rows */
      for (int r = 0; r < p_bnds.getHeight(); r++) {
            /* Park pixel pointers at the start pixels */
            TPixelPtr srcPtr = src.getPixelPtr(i_bnds.m_l, i_bnds.m_t + r);
            TPixelPtr desPtr = getPixelPtr(p_bnds.m_l, p_bnds.m_t + r);
            /* Iterate through the columns */
            for (int c = 0; c < p_bnds.getWidth(); c++) {
                  /* Retrieve colors from source and destination pixmaps*/
                  getColor(*srcPtr, srcColor);
                  getColor(*desPtr, desColor);
                  /* Blend the colors */
                  desColor.blendColor(srcColor);
                  /* Write color back to destination pixmap */
                  *desPtr = getPixelValue(desColor);
                  srcPtr++;
                  desPtr++;
            }
      }
}

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