/src/freeimage-svn/FreeImage/trunk/Source/FreeImage/Conversion32.cpp

Source
// ==========================================================
// Bitmap conversion routines
//
// Design and implementation by
// - Floris van den Berg (flvdberg@wxs.nl)
// - Herv� Drolon (drolon@infonie.fr)
// - Jani Kajala (janik@remedy.fi)
// - Detlev Vendt (detlev.vendt@brillit.de)
//
// This file is part of FreeImage 3
//
// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
// THIS DISCLAIMER.
//
// Use at your own risk!
// ==========================================================

#include "FreeImage.h"
#include "Utilities.h"

// ----------------------------------------------------------
//  internal conversions X to 32 bits
// ----------------------------------------------------------

void DLL_CALLCONV
FreeImage_ConvertLine1To32(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
  for (int cols = 0; cols < width_in_pixels; cols++) {
    int index = (source[cols>>3] & (0x80 >> (cols & 0x07))) != 0 ? 1 : 0;

    target[FI_RGBA_BLUE] = palette[index].rgbBlue;
    target[FI_RGBA_GREEN] = palette[index].rgbGreen;
    target[FI_RGBA_RED]   = palette[index].rgbRed;
    target[FI_RGBA_ALPHA] = 0xFF;
    target += 4;
  } 
}

void DLL_CALLCONV
FreeImage_ConvertLine4To32(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
  BOOL low_nibble = FALSE;
  int x = 0;

  for (int cols = 0 ; cols < width_in_pixels ; ++cols) {
    if (low_nibble) {
      target[FI_RGBA_BLUE] = palette[LOWNIBBLE(source[x])].rgbBlue;
      target[FI_RGBA_GREEN] = palette[LOWNIBBLE(source[x])].rgbGreen;
      target[FI_RGBA_RED]   = palette[LOWNIBBLE(source[x])].rgbRed;

      x++;
    } else {
      target[FI_RGBA_BLUE] = palette[HINIBBLE(source[x]) >> 4].rgbBlue;
      target[FI_RGBA_GREEN] = palette[HINIBBLE(source[x]) >> 4].rgbGreen;
      target[FI_RGBA_RED]   = palette[HINIBBLE(source[x]) >> 4].rgbRed;
    }

    low_nibble = !low_nibble;

    target[FI_RGBA_ALPHA] = 0xFF;
    target += 4;
  }
}

void DLL_CALLCONV
FreeImage_ConvertLine8To32(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette) {
  for (int cols = 0; cols < width_in_pixels; cols++) {
    target[FI_RGBA_BLUE] = palette[source[cols]].rgbBlue;
    target[FI_RGBA_GREEN] = palette[source[cols]].rgbGreen;
    target[FI_RGBA_RED]   = palette[source[cols]].rgbRed;
    target[FI_RGBA_ALPHA] = 0xFF;
    target += 4;
  }
}

void DLL_CALLCONV
FreeImage_ConvertLine16To32_555(BYTE *target, BYTE *source, int width_in_pixels) {
  WORD *bits = (WORD *)source;

  for (int cols = 0; cols < width_in_pixels; cols++) {
    target[FI_RGBA_RED]   = (BYTE)((((bits[cols] & FI16_555_RED_MASK) >> FI16_555_RED_SHIFT) * 0xFF) / 0x1F);
    target[FI_RGBA_GREEN] = (BYTE)((((bits[cols] & FI16_555_GREEN_MASK) >> FI16_555_GREEN_SHIFT) * 0xFF) / 0x1F);
    target[FI_RGBA_BLUE]  = (BYTE)((((bits[cols] & FI16_555_BLUE_MASK) >> FI16_555_BLUE_SHIFT) * 0xFF) / 0x1F);
    target[FI_RGBA_ALPHA] = 0xFF;
    target += 4;
  }
}

void DLL_CALLCONV
FreeImage_ConvertLine16To32_565(BYTE *target, BYTE *source, int width_in_pixels) {
  WORD *bits = (WORD *)source;

  for (int cols = 0; cols < width_in_pixels; cols++) {
    target[FI_RGBA_RED]   = (BYTE)((((bits[cols] & FI16_565_RED_MASK) >> FI16_565_RED_SHIFT) * 0xFF) / 0x1F);
    target[FI_RGBA_GREEN] = (BYTE)((((bits[cols] & FI16_565_GREEN_MASK) >> FI16_565_GREEN_SHIFT) * 0xFF) / 0x3F);
    target[FI_RGBA_BLUE]  = (BYTE)((((bits[cols] & FI16_565_BLUE_MASK) >> FI16_565_BLUE_SHIFT) * 0xFF) / 0x1F);
    target[FI_RGBA_ALPHA] = 0xFF;
    target += 4;
  }
}
/*
void DLL_CALLCONV
FreeImage_ConvertLine24To32(BYTE *target, BYTE *source, int width_in_pixels) {
  for (int cols = 0; cols < width_in_pixels; cols++) {
    *(DWORD *)target = (*(DWORD *) source & FI_RGBA_RGB_MASK) | FI_RGBA_ALPHA_MASK;
    target += 4;
    source += 3;
  }
}
*/
/**
This unoptimized version of the conversion function avoid an undetermined bug with VC++ SP6. 
The bug occurs in release mode only, when the image height is equal to 537 
(try e.g. a size of 432x537 to reproduce the bug with the optimized function).
*/
void DLL_CALLCONV
FreeImage_ConvertLine24To32(BYTE *target, BYTE *source, int width_in_pixels) {
  for (int cols = 0; cols < width_in_pixels; cols++) {
    target[FI_RGBA_RED]   = source[FI_RGBA_RED];
    target[FI_RGBA_GREEN] = source[FI_RGBA_GREEN];
    target[FI_RGBA_BLUE]  = source[FI_RGBA_BLUE];
    target[FI_RGBA_ALPHA] = 0xFF;
    target += 4;
    source += 3;
  }
}

// ----------------------------------------------------------

void DLL_CALLCONV
FreeImage_ConvertLine1To32MapTransparency(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette, BYTE *table, int transparent_pixels) {
  for (int cols = 0; cols < width_in_pixels; cols++) {
    int index = (source[cols>>3] & (0x80 >> (cols & 0x07))) != 0 ? 1 : 0;

    target[FI_RGBA_BLUE] = palette[index].rgbBlue;
    target[FI_RGBA_GREEN] = palette[index].rgbGreen;
    target[FI_RGBA_RED]   = palette[index].rgbRed;
    target[FI_RGBA_ALPHA] = (index < transparent_pixels) ? table[index] : 255;   
    target += 4;
  } 
}

void DLL_CALLCONV
FreeImage_ConvertLine4To32MapTransparency(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette, BYTE *table, int transparent_pixels) {
  BOOL low_nibble = FALSE;
  int x = 0;

  for (int cols = 0 ; cols < width_in_pixels ; ++cols) {
    if (low_nibble) {
      target[FI_RGBA_BLUE] = palette[LOWNIBBLE(source[x])].rgbBlue;
      target[FI_RGBA_GREEN] = palette[LOWNIBBLE(source[x])].rgbGreen;
      target[FI_RGBA_RED]   = palette[LOWNIBBLE(source[x])].rgbRed;
      target[FI_RGBA_ALPHA] = (LOWNIBBLE(source[x]) < transparent_pixels) ? table[LOWNIBBLE(source[x])] : 255;

      x++;
    } else {
      target[FI_RGBA_BLUE] = palette[HINIBBLE(source[x]) >> 4].rgbBlue;
      target[FI_RGBA_GREEN] = palette[HINIBBLE(source[x]) >> 4].rgbGreen;
      target[FI_RGBA_RED]   = palette[HINIBBLE(source[x]) >> 4].rgbRed;
      target[FI_RGBA_ALPHA] = (HINIBBLE(source[x] >> 4) < transparent_pixels) ? table[HINIBBLE(source[x]) >> 4] : 255;
    }

    low_nibble = !low_nibble;
        
    target += 4;
  }
}

void DLL_CALLCONV
FreeImage_ConvertLine8To32MapTransparency(BYTE *target, BYTE *source, int width_in_pixels, RGBQUAD *palette, BYTE *table, int transparent_pixels) {
  for (int cols = 0; cols < width_in_pixels; cols++) {
    target[FI_RGBA_BLUE] = palette[source[cols]].rgbBlue;
    target[FI_RGBA_GREEN] = palette[source[cols]].rgbGreen;
    target[FI_RGBA_RED]   = palette[source[cols]].rgbRed;
    target[FI_RGBA_ALPHA] = (source[cols] < transparent_pixels) ? table[source[cols]] : 255;
    target += 4;    
  }
}

// ----------------------------------------------------------

FIBITMAP * DLL_CALLCONV
FreeImage_ConvertTo32Bits(FIBITMAP *dib) {
  if(!FreeImage_HasPixels(dib)) return NULL;

  const int bpp = FreeImage_GetBPP(dib);
  const FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
  
  if((image_type != FIT_BITMAP) && (image_type != FIT_RGB16) && (image_type != FIT_RGBA16)) {
    return NULL;
  }
  
  const int width = FreeImage_GetWidth(dib);
  const int height = FreeImage_GetHeight(dib);

  if(image_type == FIT_BITMAP) {

    if(bpp == 32) {
      return FreeImage_Clone(dib);
    }

    FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
    if(new_dib == NULL) {
      return NULL;
    }

    // copy metadata from src to dst
    FreeImage_CloneMetadata(new_dib, dib);

    BOOL bIsTransparent = FreeImage_IsTransparent(dib);

    switch(bpp) {
      case 1:
      {
        if(bIsTransparent) {
          for (int rows = 0; rows < height; rows++) {
            FreeImage_ConvertLine1To32MapTransparency(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib));
          }
        } else {
          for (int rows = 0; rows < height; rows++) {
            FreeImage_ConvertLine1To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
          }          
        }

        return new_dib;
      }

      case 4:
      {
        if(bIsTransparent) {
          for (int rows = 0; rows < height; rows++) {
            FreeImage_ConvertLine4To32MapTransparency(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib));
          }
        } else {
          for (int rows = 0; rows < height; rows++) {
            FreeImage_ConvertLine4To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
          }          
        }

        return new_dib;
      }
        
      case 8:
      {
        if(bIsTransparent) {
          for (int rows = 0; rows < height; rows++) {
            FreeImage_ConvertLine8To32MapTransparency(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib));
          }
        } else {
          for (int rows = 0; rows < height; rows++) {
            FreeImage_ConvertLine8To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
          }          
        }

        return new_dib;
      }

      case 16:
      {
        for (int rows = 0; rows < height; rows++) {
          if ((FreeImage_GetRedMask(dib) == FI16_565_RED_MASK) && (FreeImage_GetGreenMask(dib) == FI16_565_GREEN_MASK) && (FreeImage_GetBlueMask(dib) == FI16_565_BLUE_MASK)) {
            FreeImage_ConvertLine16To32_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
          } else {
            // includes case where all the masks are 0
            FreeImage_ConvertLine16To32_555(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
          }
        }

        return new_dib;
      }

      case 24:
      {
        for (int rows = 0; rows < height; rows++) {
          FreeImage_ConvertLine24To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
        }

        return new_dib;
      }
    }

  } else if(image_type == FIT_RGB16) {
    FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
    if(new_dib == NULL) {
      return NULL;
    }

    // copy metadata from src to dst
    FreeImage_CloneMetadata(new_dib, dib);

    const unsigned src_pitch = FreeImage_GetPitch(dib);
    const unsigned dst_pitch = FreeImage_GetPitch(new_dib);
    const BYTE *src_bits = FreeImage_GetBits(dib);
    BYTE *dst_bits = FreeImage_GetBits(new_dib);
    for (int rows = 0; rows < height; rows++) {
      const FIRGB16 *src_pixel = (FIRGB16*)src_bits;
      RGBQUAD *dst_pixel = (RGBQUAD*)dst_bits;
      for(int cols = 0; cols < width; cols++) {
        dst_pixel[cols].rgbRed    = (BYTE)(src_pixel[cols].red   >> 8);
        dst_pixel[cols].rgbGreen  = (BYTE)(src_pixel[cols].green >> 8);
        dst_pixel[cols].rgbBlue   = (BYTE)(src_pixel[cols].blue  >> 8);
        dst_pixel[cols].rgbReserved = (BYTE)0xFF;
      }
      src_bits += src_pitch;
      dst_bits += dst_pitch;
    }

    return new_dib;

  } else if(image_type == FIT_RGBA16) {
    FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
    if(new_dib == NULL) {
      return NULL;
    }

    // copy metadata from src to dst
    FreeImage_CloneMetadata(new_dib, dib);

    const unsigned src_pitch = FreeImage_GetPitch(dib);
    const unsigned dst_pitch = FreeImage_GetPitch(new_dib);
    const BYTE *src_bits = FreeImage_GetBits(dib);
    BYTE *dst_bits = FreeImage_GetBits(new_dib);
    for (int rows = 0; rows < height; rows++) {
      const FIRGBA16 *src_pixel = (FIRGBA16*)src_bits;
      RGBQUAD *dst_pixel = (RGBQUAD*)dst_bits;
      for(int cols = 0; cols < width; cols++) {
        dst_pixel[cols].rgbRed    = (BYTE)(src_pixel[cols].red   >> 8);
        dst_pixel[cols].rgbGreen  = (BYTE)(src_pixel[cols].green >> 8);
        dst_pixel[cols].rgbBlue   = (BYTE)(src_pixel[cols].blue  >> 8);
        dst_pixel[cols].rgbReserved = (BYTE)(src_pixel[cols].alpha >> 8);
      }
      src_bits += src_pitch;
      dst_bits += dst_pitch;
    }   

    return new_dib;
  }
  
  return NULL;
}

Coverage Report

Created: 2025-10-28 06:24

Line	Count	Source
1		// ==========================================================
2		// Bitmap conversion routines
3		//
4		// Design and implementation by
5		// - Floris van den Berg (flvdberg@wxs.nl)
6		// - Herv� Drolon (drolon@infonie.fr)
7		// - Jani Kajala (janik@remedy.fi)
8		// - Detlev Vendt (detlev.vendt@brillit.de)
9		//
10		// This file is part of FreeImage 3
11		//
12		// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY
13		// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES
14		// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE
15		// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED
16		// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT
17		// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY
18		// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL
19		// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER
20		// THIS DISCLAIMER.
21		//
22		// Use at your own risk!
23		// ==========================================================
24
25		#include "FreeImage.h"
26		#include "Utilities.h"
27
28		// ----------------------------------------------------------
29		// internal conversions X to 32 bits
30		// ----------------------------------------------------------
31
32		void DLL_CALLCONV
33	0	FreeImage_ConvertLine1To32(BYTE target, BYTE source, int width_in_pixels, RGBQUAD *palette) {
34	0	for (int cols = 0; cols < width_in_pixels; cols++) {
35	0	int index = (source[cols>>3] & (0x80 >> (cols & 0x07))) != 0 ? 1 : 0;
36
37	0	target[FI_RGBA_BLUE] = palette[index].rgbBlue;
38	0	target[FI_RGBA_GREEN] = palette[index].rgbGreen;
39	0	target[FI_RGBA_RED] = palette[index].rgbRed;
40	0	target[FI_RGBA_ALPHA] = 0xFF;
41	0	target += 4;
42	0	}
43	0	}
44
45		void DLL_CALLCONV
46	0	FreeImage_ConvertLine4To32(BYTE target, BYTE source, int width_in_pixels, RGBQUAD *palette) {
47	0	BOOL low_nibble = FALSE;
48	0	int x = 0;
49
50	0	for (int cols = 0 ; cols < width_in_pixels ; ++cols) {
51	0	if (low_nibble) {
52	0	target[FI_RGBA_BLUE] = palette[LOWNIBBLE(source[x])].rgbBlue;
53	0	target[FI_RGBA_GREEN] = palette[LOWNIBBLE(source[x])].rgbGreen;
54	0	target[FI_RGBA_RED] = palette[LOWNIBBLE(source[x])].rgbRed;
55
56	0	x++;
57	0	} else {
58	0	target[FI_RGBA_BLUE] = palette[HINIBBLE(source[x]) >> 4].rgbBlue;
59	0	target[FI_RGBA_GREEN] = palette[HINIBBLE(source[x]) >> 4].rgbGreen;
60	0	target[FI_RGBA_RED] = palette[HINIBBLE(source[x]) >> 4].rgbRed;
61	0	}
62
63	0	low_nibble = !low_nibble;
64
65	0	target[FI_RGBA_ALPHA] = 0xFF;
66	0	target += 4;
67	0	}
68	0	}
69
70		void DLL_CALLCONV
71	0	FreeImage_ConvertLine8To32(BYTE target, BYTE source, int width_in_pixels, RGBQUAD *palette) {
72	0	for (int cols = 0; cols < width_in_pixels; cols++) {
73	0	target[FI_RGBA_BLUE] = palette[source[cols]].rgbBlue;
74	0	target[FI_RGBA_GREEN] = palette[source[cols]].rgbGreen;
75	0	target[FI_RGBA_RED] = palette[source[cols]].rgbRed;
76	0	target[FI_RGBA_ALPHA] = 0xFF;
77	0	target += 4;
78	0	}
79	0	}
80
81		void DLL_CALLCONV
82	0	FreeImage_ConvertLine16To32_555(BYTE target, BYTE source, int width_in_pixels) {
83	0	WORD bits = (WORD )source;
84
85	0	for (int cols = 0; cols < width_in_pixels; cols++) {
86	0	target[FI_RGBA_RED] = (BYTE)((((bits[cols] & FI16_555_RED_MASK) >> FI16_555_RED_SHIFT) * 0xFF) / 0x1F);
87	0	target[FI_RGBA_GREEN] = (BYTE)((((bits[cols] & FI16_555_GREEN_MASK) >> FI16_555_GREEN_SHIFT) * 0xFF) / 0x1F);
88	0	target[FI_RGBA_BLUE] = (BYTE)((((bits[cols] & FI16_555_BLUE_MASK) >> FI16_555_BLUE_SHIFT) * 0xFF) / 0x1F);
89	0	target[FI_RGBA_ALPHA] = 0xFF;
90	0	target += 4;
91	0	}
92	0	}
93
94		void DLL_CALLCONV
95	0	FreeImage_ConvertLine16To32_565(BYTE target, BYTE source, int width_in_pixels) {
96	0	WORD bits = (WORD )source;
97
98	0	for (int cols = 0; cols < width_in_pixels; cols++) {
99	0	target[FI_RGBA_RED] = (BYTE)((((bits[cols] & FI16_565_RED_MASK) >> FI16_565_RED_SHIFT) * 0xFF) / 0x1F);
100	0	target[FI_RGBA_GREEN] = (BYTE)((((bits[cols] & FI16_565_GREEN_MASK) >> FI16_565_GREEN_SHIFT) * 0xFF) / 0x3F);
101	0	target[FI_RGBA_BLUE] = (BYTE)((((bits[cols] & FI16_565_BLUE_MASK) >> FI16_565_BLUE_SHIFT) * 0xFF) / 0x1F);
102	0	target[FI_RGBA_ALPHA] = 0xFF;
103	0	target += 4;
104	0	}
105	0	}
106		/*
107		void DLL_CALLCONV
108		FreeImage_ConvertLine24To32(BYTE target, BYTE source, int width_in_pixels) {
109		for (int cols = 0; cols < width_in_pixels; cols++) {
110		(DWORD )target = ((DWORD ) source & FI_RGBA_RGB_MASK) \| FI_RGBA_ALPHA_MASK;
111		target += 4;
112		source += 3;
113		}
114		}
115		*/
116		/**
117		This unoptimized version of the conversion function avoid an undetermined bug with VC++ SP6.
118		The bug occurs in release mode only, when the image height is equal to 537
119		(try e.g. a size of 432x537 to reproduce the bug with the optimized function).
120		*/
121		void DLL_CALLCONV
122	0	FreeImage_ConvertLine24To32(BYTE target, BYTE source, int width_in_pixels) {
123	0	for (int cols = 0; cols < width_in_pixels; cols++) {
124	0	target[FI_RGBA_RED] = source[FI_RGBA_RED];
125	0	target[FI_RGBA_GREEN] = source[FI_RGBA_GREEN];
126	0	target[FI_RGBA_BLUE] = source[FI_RGBA_BLUE];
127	0	target[FI_RGBA_ALPHA] = 0xFF;
128	0	target += 4;
129	0	source += 3;
130	0	}
131	0	}
132
133		// ----------------------------------------------------------
134
135		void DLL_CALLCONV
136	0	FreeImage_ConvertLine1To32MapTransparency(BYTE target, BYTE source, int width_in_pixels, RGBQUAD palette, BYTE table, int transparent_pixels) {
137	0	for (int cols = 0; cols < width_in_pixels; cols++) {
138	0	int index = (source[cols>>3] & (0x80 >> (cols & 0x07))) != 0 ? 1 : 0;
139
140	0	target[FI_RGBA_BLUE] = palette[index].rgbBlue;
141	0	target[FI_RGBA_GREEN] = palette[index].rgbGreen;
142	0	target[FI_RGBA_RED] = palette[index].rgbRed;
143	0	target[FI_RGBA_ALPHA] = (index < transparent_pixels) ? table[index] : 255;
144	0	target += 4;
145	0	}
146	0	}
147
148		void DLL_CALLCONV
149	0	FreeImage_ConvertLine4To32MapTransparency(BYTE target, BYTE source, int width_in_pixels, RGBQUAD palette, BYTE table, int transparent_pixels) {
150	0	BOOL low_nibble = FALSE;
151	0	int x = 0;
152
153	0	for (int cols = 0 ; cols < width_in_pixels ; ++cols) {
154	0	if (low_nibble) {
155	0	target[FI_RGBA_BLUE] = palette[LOWNIBBLE(source[x])].rgbBlue;
156	0	target[FI_RGBA_GREEN] = palette[LOWNIBBLE(source[x])].rgbGreen;
157	0	target[FI_RGBA_RED] = palette[LOWNIBBLE(source[x])].rgbRed;
158	0	target[FI_RGBA_ALPHA] = (LOWNIBBLE(source[x]) < transparent_pixels) ? table[LOWNIBBLE(source[x])] : 255;
159
160	0	x++;
161	0	} else {
162	0	target[FI_RGBA_BLUE] = palette[HINIBBLE(source[x]) >> 4].rgbBlue;
163	0	target[FI_RGBA_GREEN] = palette[HINIBBLE(source[x]) >> 4].rgbGreen;
164	0	target[FI_RGBA_RED] = palette[HINIBBLE(source[x]) >> 4].rgbRed;
165	0	target[FI_RGBA_ALPHA] = (HINIBBLE(source[x] >> 4) < transparent_pixels) ? table[HINIBBLE(source[x]) >> 4] : 255;
166	0	}
167
168	0	low_nibble = !low_nibble;
169
170	0	target += 4;
171	0	}
172	0	}
173
174		void DLL_CALLCONV
175	0	FreeImage_ConvertLine8To32MapTransparency(BYTE target, BYTE source, int width_in_pixels, RGBQUAD palette, BYTE table, int transparent_pixels) {
176	0	for (int cols = 0; cols < width_in_pixels; cols++) {
177	0	target[FI_RGBA_BLUE] = palette[source[cols]].rgbBlue;
178	0	target[FI_RGBA_GREEN] = palette[source[cols]].rgbGreen;
179	0	target[FI_RGBA_RED] = palette[source[cols]].rgbRed;
180	0	target[FI_RGBA_ALPHA] = (source[cols] < transparent_pixels) ? table[source[cols]] : 255;
181	0	target += 4;
182	0	}
183	0	}
184
185		// ----------------------------------------------------------
186
187		FIBITMAP * DLL_CALLCONV
188	0	FreeImage_ConvertTo32Bits(FIBITMAP *dib) {
189	0	if(!FreeImage_HasPixels(dib)) return NULL;
190
191	0	const int bpp = FreeImage_GetBPP(dib);
192	0	const FREE_IMAGE_TYPE image_type = FreeImage_GetImageType(dib);
193
194	0	if((image_type != FIT_BITMAP) && (image_type != FIT_RGB16) && (image_type != FIT_RGBA16)) {
195	0	return NULL;
196	0	}
197
198	0	const int width = FreeImage_GetWidth(dib);
199	0	const int height = FreeImage_GetHeight(dib);
200
201	0	if(image_type == FIT_BITMAP) {
202
203	0	if(bpp == 32) {
204	0	return FreeImage_Clone(dib);
205	0	}
206
207	0	FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
208	0	if(new_dib == NULL) {
209	0	return NULL;
210	0	}
211
212		// copy metadata from src to dst
213	0	FreeImage_CloneMetadata(new_dib, dib);
214
215	0	BOOL bIsTransparent = FreeImage_IsTransparent(dib);
216
217	0	switch(bpp) {
218	0	case 1:
219	0	{
220	0	if(bIsTransparent) {
221	0	for (int rows = 0; rows < height; rows++) {
222	0	FreeImage_ConvertLine1To32MapTransparency(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib));
223	0	}
224	0	} else {
225	0	for (int rows = 0; rows < height; rows++) {
226	0	FreeImage_ConvertLine1To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
227	0	}
228	0	}
229
230	0	return new_dib;
231	0	}
232
233	0	case 4:
234	0	{
235	0	if(bIsTransparent) {
236	0	for (int rows = 0; rows < height; rows++) {
237	0	FreeImage_ConvertLine4To32MapTransparency(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib));
238	0	}
239	0	} else {
240	0	for (int rows = 0; rows < height; rows++) {
241	0	FreeImage_ConvertLine4To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
242	0	}
243	0	}
244
245	0	return new_dib;
246	0	}
247
248	0	case 8:
249	0	{
250	0	if(bIsTransparent) {
251	0	for (int rows = 0; rows < height; rows++) {
252	0	FreeImage_ConvertLine8To32MapTransparency(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib), FreeImage_GetTransparencyTable(dib), FreeImage_GetTransparencyCount(dib));
253	0	}
254	0	} else {
255	0	for (int rows = 0; rows < height; rows++) {
256	0	FreeImage_ConvertLine8To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width, FreeImage_GetPalette(dib));
257	0	}
258	0	}
259
260	0	return new_dib;
261	0	}
262
263	0	case 16:
264	0	{
265	0	for (int rows = 0; rows < height; rows++) {
266	0	if ((FreeImage_GetRedMask(dib) == FI16_565_RED_MASK) && (FreeImage_GetGreenMask(dib) == FI16_565_GREEN_MASK) && (FreeImage_GetBlueMask(dib) == FI16_565_BLUE_MASK)) {
267	0	FreeImage_ConvertLine16To32_565(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
268	0	} else {
269		// includes case where all the masks are 0
270	0	FreeImage_ConvertLine16To32_555(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
271	0	}
272	0	}
273
274	0	return new_dib;
275	0	}
276
277	0	case 24:
278	0	{
279	0	for (int rows = 0; rows < height; rows++) {
280	0	FreeImage_ConvertLine24To32(FreeImage_GetScanLine(new_dib, rows), FreeImage_GetScanLine(dib, rows), width);
281	0	}
282
283	0	return new_dib;
284	0	}
285	0	}
286
287	0	} else if(image_type == FIT_RGB16) {
288	0	FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
289	0	if(new_dib == NULL) {
290	0	return NULL;
291	0	}
292
293		// copy metadata from src to dst
294	0	FreeImage_CloneMetadata(new_dib, dib);
295
296	0	const unsigned src_pitch = FreeImage_GetPitch(dib);
297	0	const unsigned dst_pitch = FreeImage_GetPitch(new_dib);
298	0	const BYTE *src_bits = FreeImage_GetBits(dib);
299	0	BYTE *dst_bits = FreeImage_GetBits(new_dib);
300	0	for (int rows = 0; rows < height; rows++) {
301	0	const FIRGB16 src_pixel = (FIRGB16)src_bits;
302	0	RGBQUAD dst_pixel = (RGBQUAD)dst_bits;
303	0	for(int cols = 0; cols < width; cols++) {
304	0	dst_pixel[cols].rgbRed = (BYTE)(src_pixel[cols].red >> 8);
305	0	dst_pixel[cols].rgbGreen = (BYTE)(src_pixel[cols].green >> 8);
306	0	dst_pixel[cols].rgbBlue = (BYTE)(src_pixel[cols].blue >> 8);
307	0	dst_pixel[cols].rgbReserved = (BYTE)0xFF;
308	0	}
309	0	src_bits += src_pitch;
310	0	dst_bits += dst_pitch;
311	0	}
312
313	0	return new_dib;
314
315	0	} else if(image_type == FIT_RGBA16) {
316	0	FIBITMAP *new_dib = FreeImage_Allocate(width, height, 32, FI_RGBA_RED_MASK, FI_RGBA_GREEN_MASK, FI_RGBA_BLUE_MASK);
317	0	if(new_dib == NULL) {
318	0	return NULL;
319	0	}
320
321		// copy metadata from src to dst
322	0	FreeImage_CloneMetadata(new_dib, dib);
323
324	0	const unsigned src_pitch = FreeImage_GetPitch(dib);
325	0	const unsigned dst_pitch = FreeImage_GetPitch(new_dib);
326	0	const BYTE *src_bits = FreeImage_GetBits(dib);
327	0	BYTE *dst_bits = FreeImage_GetBits(new_dib);
328	0	for (int rows = 0; rows < height; rows++) {
329	0	const FIRGBA16 src_pixel = (FIRGBA16)src_bits;
330	0	RGBQUAD dst_pixel = (RGBQUAD)dst_bits;
331	0	for(int cols = 0; cols < width; cols++) {
332	0	dst_pixel[cols].rgbRed = (BYTE)(src_pixel[cols].red >> 8);
333	0	dst_pixel[cols].rgbGreen = (BYTE)(src_pixel[cols].green >> 8);
334	0	dst_pixel[cols].rgbBlue = (BYTE)(src_pixel[cols].blue >> 8);
335	0	dst_pixel[cols].rgbReserved = (BYTE)(src_pixel[cols].alpha >> 8);
336	0	}
337	0	src_bits += src_pitch;
338	0	dst_bits += dst_pitch;
339	0	}
340
341	0	return new_dib;
342	0	}
343
344	0	return NULL;
345	0	}