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IMG_PixmapRGBA32.cpp

/**
 * $Id: IMG_PixmapRGBA32.cpp,v 1.3 2002/11/25 15:29:38 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 *****
 */

#include "IMG_PixmapRGBA32.h"

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

00038 IMG_PixmapRGBA32::IMG_PixmapRGBA32(TUns32 width, TUns32 height)
      : IMG_Pixmap(), m_mem(width * height)
{
      m_image = m_mem;
      m_width = width;
      m_height = height;
      m_rowBytes = width * sizeof(TPixelRGBA32);
      m_pixelSize = 8 * sizeof(TPixelRGBA32);
      m_pixelType = kPixelTypeRGBA32;
}


00050 IMG_PixmapRGBA32::IMG_PixmapRGBA32(void* image, TUns32 width, TUns32 height, TUns32 rowBytes)
      : IMG_Pixmap(), m_mem(image, width * rowBytes)
{
      m_image = m_mem;
      m_width = width;
      m_height = height;
      m_rowBytes = rowBytes;
      m_pixelSize = 8 * sizeof(TPixelRGBA32);
      m_pixelType = kPixelTypeRGBA32;
}


00062 void IMG_PixmapRGBA32::fillRect(const IMG_Rect& r, const IMG_ColorRGB& c)
{
      IMG_Rect t_bnds (0, 0, m_width, m_height);      // Bounds of this pixmap
      IMG_Rect r_bnds (r);                                  // Area to set

      // Determine visibility
      TVisibility v = t_bnds.getVisibility(r_bnds);
      if (v == kNotVisible) return;
      if (v == 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 (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 (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;
      TUns8* srcBytes = (TUns8*) &src;
      
      // Set the pixels in the destination rectangle
      for (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 (TInt32 x = r.m_l; x < r.m_r; x++) {
                  // Set the new pixel value (retain current alpha)
                  ((TUns8*)desPtr)[bi_r] = srcBytes[bi_r];
                  ((TUns8*)desPtr)[bi_g] = srcBytes[bi_g];
                  ((TUns8*)desPtr)[bi_b] = srcBytes[bi_b];
                  desPtr++;
            }
      }
#endif
}


00118 void IMG_PixmapRGBA32::fillRect(const IMG_Rect& r, const IMG_ColorRGBA& c)
{
      IMG_Rect t_bnds (0, 0, m_width, m_height);      // Bounds of this pixmap
      IMG_Rect r_bnds (r);                                  // Area to set

      // Determine visibility
      TVisibility v = t_bnds.getVisibility(r_bnds);
      if (v == kNotVisible) return;
      if (v == 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 (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 (TInt32 x = r.m_l; x < r.m_r; x++) {
                  *(desPtr++) = pixel;
            }
      }
}


00146 void IMG_PixmapRGBA32::setPixmap(TUns32 x, TUns32 y, const IMG_PixmapRGBA32& pixmap, const IMG_Rect& bnds)
{
      IMG_Rect i_bnds (bnds);                               // Bounds of input pixmap
      IMG_Rect t_bnds (0, 0, m_width, m_height);      // Bounds of this pixmap
      IMG_Rect p_bnds (bnds);                               // Bounds of the paste area
      p_bnds.setCenter(x, y);
      
      // 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
      TVisibility v = t_bnds.getVisibility(p_bnds);
      if (v == kNotVisible) return;
      if (v == 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;
            }
            TInt32 d = p_bnds.getWidth();
            if (p_bnds.m_r > d) {
                  i_bnds.m_t -= d - p_bnds.m_r;
                  p_bnds.m_t = d;
            }
            d = p_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 (TInt32 r = 0; r < p_bnds.getHeight(); r++) {
            // Park pixel pointers at the start pixels
            TPixelPtr srcPtr = 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++);
            }
      }
}


00197 void IMG_PixmapRGBA32::blendPixmap(TUns32 x, TUns32 y, const IMG_PixmapRGBA32& pixmap, const IMG_Rect& bnds)
{
      IMG_Rect i_bnds (bnds);                               // Bounds of input pixmap
      IMG_Rect t_bnds (0, 0, m_width, m_height);      // Bounds of this pixmap
      IMG_Rect p_bnds (bnds);                               // Bounds of the paste area
      p_bnds.setCenter(x, y);
      
      // 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
      TVisibility v = t_bnds.getVisibility(p_bnds);
      if (v == kNotVisible) return;
      if (v == 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;
            }
            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 = pixmap.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++;
            }
      }
}


00259 void IMG_PixmapRGBA32::blendPixmap(float u, float v, const IMG_PixmapRGBA32& pixmap)
{
      TUns32 x, y;
      getPixelAddress(u, v, x, y);
      blendPixmap(x, y, pixmap);
}

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