function GD2ICOstring(&$gd_image_array)
{
foreach ($gd_image_array as $key => $gd_image) {
$ImageWidths[$key] = ImageSX($gd_image);
$ImageHeights[$key] = ImageSY($gd_image);
$bpp[$key] = ImageIsTrueColor($gd_image) ? 32 : 24;
$totalcolors[$key] = ImageColorsTotal($gd_image);
$icXOR[$key] = '';
for ($y = $ImageHeights[$key] - 1; $y >= 0; $y--) {
for ($x = 0; $x < $ImageWidths[$key]; $x++) {
$argb = phpthumb_functions::GetPixelColor($gd_image, $x, $y);
$a = round(255 * ((127 - $argb['alpha']) / 127));
$r = $argb['red'];
$g = $argb['green'];
$b = $argb['blue'];
if ($bpp[$key] == 32) {
$icXOR[$key] .= chr($b) . chr($g) . chr($r) . chr($a);
} elseif ($bpp[$key] == 24) {
$icXOR[$key] .= chr($b) . chr($g) . chr($r);
}
if ($a < 128) {
@($icANDmask[$key][$y] .= '1');
} else {
@($icANDmask[$key][$y] .= '0');
}
}
// mask bits are 32-bit aligned per scanline
while (strlen($icANDmask[$key][$y]) % 32) {
$icANDmask[$key][$y] .= '0';
}
}
$icAND[$key] = '';
foreach ($icANDmask[$key] as $y => $scanlinemaskbits) {
for ($i = 0; $i < strlen($scanlinemaskbits); $i += 8) {
$icAND[$key] .= chr(bindec(str_pad(substr($scanlinemaskbits, $i, 8), 8, '0', STR_PAD_LEFT)));
}
}
}
foreach ($gd_image_array as $key => $gd_image) {
$biSizeImage = $ImageWidths[$key] * $ImageHeights[$key] * ($bpp[$key] / 8);
// BITMAPINFOHEADER - 40 bytes
$BitmapInfoHeader[$key] = '';
$BitmapInfoHeader[$key] .= "(";
// DWORD biSize;
$BitmapInfoHeader[$key] .= phpthumb_functions::LittleEndian2String($ImageWidths[$key], 4);
// LONG biWidth;
// The biHeight member specifies the combined
// height of the XOR and AND masks.
$BitmapInfoHeader[$key] .= phpthumb_functions::LittleEndian2String($ImageHeights[$key] * 2, 4);
// LONG biHeight;
$BitmapInfoHeader[$key] .= "";
// WORD biPlanes;
$BitmapInfoHeader[$key] .= chr($bpp[$key]) . "";
// wBitCount;
$BitmapInfoHeader[$key] .= "";
// DWORD biCompression;
$BitmapInfoHeader[$key] .= phpthumb_functions::LittleEndian2String($biSizeImage, 4);
// DWORD biSizeImage;
$BitmapInfoHeader[$key] .= "";
// LONG biXPelsPerMeter;
$BitmapInfoHeader[$key] .= "";
// LONG biYPelsPerMeter;
$BitmapInfoHeader[$key] .= "";
// DWORD biClrUsed;
$BitmapInfoHeader[$key] .= "";
// DWORD biClrImportant;
}
$icondata = "";
// idReserved; // Reserved (must be 0)
$icondata .= "";
// idType; // Resource Type (1 for icons)
$icondata .= phpthumb_functions::LittleEndian2String(count($gd_image_array), 2);
// idCount; // How many images?
$dwImageOffset = 6 + count($gd_image_array) * 16;
foreach ($gd_image_array as $key => $gd_image) {
// ICONDIRENTRY idEntries[1]; // An entry for each image (idCount of 'em)
$icondata .= chr($ImageWidths[$key]);
// bWidth; // Width, in pixels, of the image
$icondata .= chr($ImageHeights[$key]);
// bHeight; // Height, in pixels, of the image
$icondata .= chr($totalcolors[$key]);
// bColorCount; // Number of colors in image (0 if >=8bpp)
$icondata .= "";
// bReserved; // Reserved ( must be 0)
$icondata .= "";
// wPlanes; // Color Planes
$icondata .= chr($bpp[$key]) . "";
// wBitCount; // Bits per pixel
$dwBytesInRes = 40 + strlen($icXOR[$key]) + strlen($icAND[$key]);
$icondata .= phpthumb_functions::LittleEndian2String($dwBytesInRes, 4);
// dwBytesInRes; // How many bytes in this resource?
$icondata .= phpthumb_functions::LittleEndian2String($dwImageOffset, 4);
// dwImageOffset; // Where in the file is this image?
$dwImageOffset += strlen($BitmapInfoHeader[$key]);
$dwImageOffset += strlen($icXOR[$key]);
$dwImageOffset += strlen($icAND[$key]);
}
foreach ($gd_image_array as $key => $gd_image) {
$icondata .= $BitmapInfoHeader[$key];
$icondata .= $icXOR[$key];
$icondata .= $icAND[$key];
}
return $icondata;
}
function GD2BMPstring(&$gd_image)
{
$imageX = ImageSX($gd_image);
$imageY = ImageSY($gd_image);
$BMP = '';
for ($y = $imageY - 1; $y >= 0; $y--) {
$thisline = '';
for ($x = 0; $x < $imageX; $x++) {
$argb = phpthumb_functions::GetPixelColor($gd_image, $x, $y);
$thisline .= chr($argb['blue']) . chr($argb['green']) . chr($argb['red']);
}
while (strlen($thisline) % 4) {
$thisline .= "";
}
$BMP .= $thisline;
}
$bmpSize = strlen($BMP) + 14 + 40;
// BITMAPFILEHEADER [14 bytes] - http://msdn.microsoft.com/library/en-us/gdi/bitmaps_62uq.asp
$BITMAPFILEHEADER = 'BM';
// WORD bfType;
$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String($bmpSize, 4);
// DWORD bfSize;
$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String(0, 2);
// WORD bfReserved1;
$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String(0, 2);
// WORD bfReserved2;
$BITMAPFILEHEADER .= phpthumb_functions::LittleEndian2String(54, 4);
// DWORD bfOffBits;
// BITMAPINFOHEADER - [40 bytes] http://msdn.microsoft.com/library/en-us/gdi/bitmaps_1rw2.asp
$BITMAPINFOHEADER = phpthumb_functions::LittleEndian2String(40, 4);
// DWORD biSize;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String($imageX, 4);
// LONG biWidth;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String($imageY, 4);
// LONG biHeight;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String(1, 2);
// WORD biPlanes;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String(24, 2);
// WORD biBitCount;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String(0, 4);
// DWORD biCompression;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String(0, 4);
// DWORD biSizeImage;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String(2835, 4);
// LONG biXPelsPerMeter;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String(2835, 4);
// LONG biYPelsPerMeter;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String(0, 4);
// DWORD biClrUsed;
$BITMAPINFOHEADER .= phpthumb_functions::LittleEndian2String(0, 4);
// DWORD biClrImportant;
return $BITMAPFILEHEADER . $BITMAPINFOHEADER . $BMP;
}
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