src/BarShader.cpp

   1 //
   2 // This file is part of the aMule Project.
   3 //
   4 // Copyright (c) 2003-2008 aMule Team ( admin@amule.org / http://www.amule.org )
   5 // Copyright (c) 2002-2008 Merkur ( devs@emule-project.net / http://www.emule-project.net )
   6 //
   7 // Any parts of this program derived from the xMule, lMule or eMule project,
   8 // or contributed by third-party developers are copyrighted by their
   9 // respective authors.
  10 //
  11 // This program is free software; you can redistribute it and/or modify
  12 // it under the terms of the GNU General Public License as published by
  13 // the Free Software Foundation; either version 2 of the License, or
  14 // (at your option) any later version.
  15 //
  16 // This program is distributed in the hope that it will be useful,
  17 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 // GNU General Public License for more details.
  20 //
  21 // You should have received a copy of the GNU General Public License
  22 // along with this program; if not, write to the Free Software
  23 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
  24 //
  25
  26 #include <wx/dc.h>
  27 #include <wx/image.h>
  28 #include "BarShader.h"          // Interface declarations.
  29 #include <cstring>              // Needed for std::memcpy
  30
  31 const double Pi = 3.14159265358979323846264338328;
  32
  33 #define HALF(X) (((X) + 1) / 2)
  34 #define DEFAULT_DEPTH 10
  35
  36 CBarShader::CBarShader(unsigned height, unsigned width)
  37 : m_Width( width ),
  38   m_Height( height ),
  39   m_FileSize( 1 ),
  40   m_Modifiers( NULL ),
  41   m_used3dlevel( DEFAULT_DEPTH ),
  42   m_Content(width, 0)
  43 {
  44 }
  45
  46
  47 CBarShader::~CBarShader()
  48 {
  49         if ( m_Modifiers ) {
  50                 delete[] m_Modifiers;
  51         }
  52 }
  53
  54
  55 void CBarShader::SetHeight(unsigned height)
  56 {
  57         if( m_Height != height ) {
  58                 m_Height = height;
  59
  60                 // Reset the modifers
  61                 if ( m_Modifiers ) {
  62                         delete[] m_Modifiers;
  63                         m_Modifiers = NULL;
  64                 }
  65         }
  66 }
  67
  68
  69 void CBarShader::SetWidth(int width)
  70 {
  71         if (width > 0) {
  72                 m_Width = width;
  73                 Fill(CMuleColour(0,0,0));
  74         }
  75 }
  76
  77
  78 void CBarShader::Set3dDepth(unsigned depth)
  79 {
  80         if ( depth < 1 ) {
  81                 depth = 1;
  82         } else if ( depth > 5 ) {
  83                 depth = 5;
  84         }
  85
  86         if ( m_used3dlevel != depth ) {
  87                 m_used3dlevel = depth;
  88
  89                 // Reset the modifers
  90                 if ( m_Modifiers ) {
  91                         delete[] m_Modifiers;
  92                         m_Modifiers = NULL;
  93                 }
  94         }
  95 }
  96
  97
  98 void CBarShader::BuildModifiers()
  99 {
 100         wxASSERT(m_used3dlevel < 7);
 101
 102         if ( m_Modifiers ) {
 103                 delete[] m_Modifiers;
 104         }
 105
 106         unsigned depth = (7 - m_used3dlevel);
 107         unsigned count = HALF(m_Height);
 108         double piOverDepth = Pi/depth;
 109         double base = piOverDepth * ((depth / 2.0) - 1);
 110         double increment = piOverDepth / (count - 1);
 111
 112         m_Modifiers = new double[count];
 113         for (unsigned i = 0; i < count; i++)
 114                 m_Modifiers[i] = (double)(sin(base + i * increment));
 115 }
 116
 117
 118 void CBarShader::FillRange(uint64 start, uint64 end, const CMuleColour& colour)
 119 {
 120         wxASSERT(m_FileSize > 0);
 121
 122         if (start >= end || start >= m_FileSize) {
 123                 return;
 124         }
 125
 126         // precision for small files: end must be increased by one
 127         // think of each byte as a visible block, then start points to
 128         // the beginning of its block, but end points to the END of its block
 129         end++;
 130
 131         if (end > m_FileSize) {
 132                 end = m_FileSize;
 133         }
 134
 135         unsigned firstPixel = start * m_Width / m_FileSize;
 136         unsigned lastPixel  = end   * m_Width / m_FileSize;
 137         if (lastPixel == m_Width) {
 138                 lastPixel--;
 139         }
 140
 141         double f_Width = m_Width;
 142         // calculate how much of this pixels is to be covered with the fill
 143         double firstCovered = firstPixel + 1 - start * f_Width / m_FileSize;
 144         double lastCovered  = end * f_Width / m_FileSize - lastPixel;
 145         // all inside one pixel ?
 146         if (firstPixel == lastPixel) {
 147                 m_Content[firstPixel].BlendWith(colour, firstCovered + lastCovered - 1.0);
 148         } else {
 149                 m_Content[firstPixel].BlendWith(colour, firstCovered);
 150                 m_Content[lastPixel].BlendWith(colour, lastCovered);
 151                 // fill pixels between (if any)
 152                 for (unsigned i = firstPixel + 1; i < lastPixel; i++) {
 153                         m_Content[i] = colour;
 154                 }
 155         }
 156 }
 157
 158
 159 void CBarShader::Draw( wxDC* dc, int iLeft, int iTop, bool bFlat )
 160 {
 161         wxASSERT( dc );
 162
 163         // Do we need to rebuild the modifiers?
 164         if ( !bFlat && !m_Modifiers ) {
 165                 BuildModifiers();
 166         }
 167
 168         // Render the bar into a raw buffer
 169         unsigned char * buf = (unsigned char *) malloc(m_Width * m_Height * 3);
 170
 171         if (bFlat) {
 172                 // draw flat bar
 173                 unsigned idx = 0;
 174                 for (unsigned x = 0; x < m_Width; x++) {
 175                         unsigned cRed   = m_Content[x].Red();
 176                         unsigned cGreen = m_Content[x].Green();
 177                         unsigned cBlue  = m_Content[x].Blue();
 178                         buf[idx++] = cRed;
 179                         buf[idx++] = cGreen;
 180                         buf[idx++] = cBlue;
 181                 }
 182                 unsigned linelength = idx;
 183                 unsigned y = 1;
 184                 for (; y < m_Height >> 1; y <<= 1, idx <<= 1) {
 185                         std::memcpy(buf + idx, buf, idx);
 186                 }
 187                 if (y < m_Height) {
 188                         std::memcpy(buf + idx, buf, (m_Height - y) * linelength);
 189                 }
 190         } else {
 191                 // draw rounded bar
 192                 unsigned Max = HALF(m_Height);
 193                 unsigned idx = 0;
 194                 for (unsigned y = 0; y < Max; y++) {
 195                         for (unsigned x = 0; x < m_Width; x++) {
 196                                 unsigned cRed   = (unsigned)(m_Content[x].Red()   * m_Modifiers[y] + .5f);
 197                                 unsigned cGreen = (unsigned)(m_Content[x].Green() * m_Modifiers[y] + .5f);
 198                                 unsigned cBlue  = (unsigned)(m_Content[x].Blue()  * m_Modifiers[y] + .5f);
 199                                 cRed   = std::min(255u, cRed);
 200                                 cGreen = std::min(255u, cGreen);
 201                                 cBlue  = std::min(255u, cBlue);
 202                                 buf[idx++] = cRed;
 203                                 buf[idx++] = cGreen;
 204                                 buf[idx++] = cBlue;
 205                         }
 206                 }
 207                 unsigned linelength = m_Width * 3;
 208                 for (unsigned y = std::max(Max, m_Height - Max); y < m_Height; y++) {
 209                         std::memcpy(buf + y * linelength, buf + (m_Height - 1 - y) * linelength, linelength);
 210                 }
 211         }
 212         wxImage image(m_Width, m_Height);
 213         image.SetData(buf);
 214         wxBitmap bitmap(image);
 215         dc->DrawBitmap(bitmap, iLeft, iTop);
 216 }
 217 // File_checked_for_headers