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 . $BMP; }
public function WhiteBalance(&$gdimg, $targetColor = '') { if (phpthumb_functions::IsHexColor($targetColor)) { $targetPixel = array('red' => hexdec(substr($targetColor, 0, 2)), 'green' => hexdec(substr($targetColor, 2, 2)), 'blue' => hexdec(substr($targetColor, 4, 2))); } else { $Analysis = phpthumb_filters::HistogramAnalysis($gdimg, false); $targetPixel = array('red' => max(array_keys($Analysis['red'])), 'green' => max(array_keys($Analysis['green'])), 'blue' => max(array_keys($Analysis['blue']))); } $grayValue = phpthumb_functions::GrayscaleValue($targetPixel['red'], $targetPixel['green'], $targetPixel['blue']); $scaleR = $grayValue / $targetPixel['red']; $scaleG = $grayValue / $targetPixel['green']; $scaleB = $grayValue / $targetPixel['blue']; for ($x = 0; $x < ImageSX($gdimg); $x++) { for ($y = 0; $y < ImageSY($gdimg); $y++) { $currentPixel = phpthumb_functions::GetPixelColor($gdimg, $x, $y); $newColor = phpthumb_functions::ImageColorAllocateAlphaSafe($gdimg, max(0, min(255, round($currentPixel['red'] * $scaleR))), max(0, min(255, round($currentPixel['green'] * $scaleG))), max(0, min(255, round($currentPixel['blue'] * $scaleB))), $currentPixel['alpha']); ImageSetPixel($gdimg, $x, $y, $newColor); } } return true; }
function GD2ICOstring(&$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 $icondata; }
function ImageCopyRespectAlpha(&$dst_im, &$src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $opacity_pct = 100) { $opacipct = $opacity_pct / 100; for ($x = $src_x; $x < $src_w; $x++) { for ($y = $src_y; $y < $src_h; $y++) { $RealPixel = phpthumb_functions::GetPixelColor($dst_im, $dst_x + $x, $dst_y + $y); $OverlayPixel = phpthumb_functions::GetPixelColor($src_im, $x, $y); $alphapct = $OverlayPixel['alpha'] / 127; $overlaypct = (1 - $alphapct) * $opacipct; $newcolor = phpthumb_functions::ImageColorAllocateAlphaSafe($dst_im, round($RealPixel['red'] * (1 - $overlaypct)) + $OverlayPixel['red'] * $overlaypct, round($RealPixel['green'] * (1 - $overlaypct)) + $OverlayPixel['green'] * $overlaypct, round($RealPixel['blue'] * (1 - $overlaypct)) + $OverlayPixel['blue'] * $overlaypct, 0); ImageSetPixel($dst_im, $dst_x + $x, $dst_y + $y, $newcolor); } } return true; }
function AlphaChannelFlatten() { if (!$this->is_alpha) { // image doesn't have alpha transparency, no need to flatten $this->DebugMessage('skipping AlphaChannelFlatten() because !$this->is_alpha', __FILE__, __LINE__); return false; } switch ($this->thumbnailFormat) { case 'png': case 'ico': // image has alpha transparency, but output as PNG or ICO which can handle it $this->DebugMessage('skipping AlphaChannelFlatten() because ($this->thumbnailFormat == "' . $this->thumbnailFormat . '")', __FILE__, __LINE__); return false; break; case 'gif': // image has alpha transparency, but output as GIF which can handle only single-color transparency $CurrentImageColorTransparent = ImageColorTransparent($this->gdimg_output); if ($CurrentImageColorTransparent == -1) { // no transparent color defined if (phpthumb_functions::gd_version() < 2.0) { $this->DebugMessage('AlphaChannelFlatten() failed because GD version is "' . phpthumb_functions::gd_version() . '"', __FILE__, __LINE__); return false; } if ($img_alpha_mixdown_dither = @ImageCreateTrueColor(ImageSX($this->gdimg_output), ImageSY($this->gdimg_output))) { for ($i = 0; $i <= 255; $i++) { $dither_color[$i] = ImageColorAllocate($img_alpha_mixdown_dither, $i, $i, $i); } // scan through current truecolor image copy alpha channel to temp image as grayscale for ($x = 0; $x < $this->thumbnail_width; $x++) { for ($y = 0; $y < $this->thumbnail_height; $y++) { $PixelColor = phpthumb_functions::GetPixelColor($this->gdimg_output, $x, $y); ImageSetPixel($img_alpha_mixdown_dither, $x, $y, $dither_color[$PixelColor['alpha'] * 2]); } } // dither alpha channel grayscale version down to 2 colors ImageTrueColorToPalette($img_alpha_mixdown_dither, true, 2); // reduce color palette to 256-1 colors (leave one palette position for transparent color) ImageTrueColorToPalette($this->gdimg_output, true, 255); // allocate a new color for transparent color index $TransparentColor = ImageColorAllocate($this->gdimg_output, 1, 254, 253); ImageColorTransparent($this->gdimg_output, $TransparentColor); // scan through alpha channel image and note pixels with >50% transparency $TransparentPixels = array(); for ($x = 0; $x < $this->thumbnail_width; $x++) { for ($y = 0; $y < $this->thumbnail_height; $y++) { $AlphaChannelPixel = phpthumb_functions::GetPixelColor($img_alpha_mixdown_dither, $x, $y); if ($AlphaChannelPixel['red'] > 127) { ImageSetPixel($this->gdimg_output, $x, $y, $TransparentColor); } } } ImageDestroy($img_alpha_mixdown_dither); $this->DebugMessage('AlphaChannelFlatten() set image to 255+1 colors with transparency for GIF output', __FILE__, __LINE__); return true; } else { $this->DebugMessage('AlphaChannelFlatten() failed ImageCreate(' . ImageSX($this->gdimg_output) . ', ' . ImageSY($this->gdimg_output) . ')', __FILE__, __LINE__); return false; } } else { // a single transparent color already defined, leave as-is $this->DebugMessage('skipping AlphaChannelFlatten() because ($this->thumbnailFormat == "' . $this->thumbnailFormat . '") and ImageColorTransparent returned "' . $CurrentImageColorTransparent . '"', __FILE__, __LINE__); return true; } break; } $this->DebugMessage('continuing AlphaChannelFlatten() for output format "' . $this->thumbnailFormat . '"', __FILE__, __LINE__); // image has alpha transparency, and is being output in a format that doesn't support it -- flatten if ($gdimg_flatten_temp = phpthumb_functions::ImageCreateFunction($this->thumbnail_width, $this->thumbnail_height)) { $this->config_background_hexcolor = $this->bg ? $this->bg : $this->config_background_hexcolor; if (!phpthumb_functions::IsHexColor($this->config_background_hexcolor)) { return $this->ErrorImage('Invalid hex color string "' . $this->config_background_hexcolor . '" for parameter "bg"'); } $background_color = phpthumb_functions::ImageHexColorAllocate($this->gdimg_output, $this->config_background_hexcolor); ImageFilledRectangle($gdimg_flatten_temp, 0, 0, $this->thumbnail_width, $this->thumbnail_height, $background_color); ImageCopy($gdimg_flatten_temp, $this->gdimg_output, 0, 0, 0, 0, $this->thumbnail_width, $this->thumbnail_height); ImageAlphaBlending($this->gdimg_output, true); ImageSaveAlpha($this->gdimg_output, false); ImageColorTransparent($this->gdimg_output, -1); ImageCopy($this->gdimg_output, $gdimg_flatten_temp, 0, 0, 0, 0, $this->thumbnail_width, $this->thumbnail_height); ImageDestroy($gdimg_flatten_temp); return true; } else { $this->DebugMessage('ImageCreateFunction() failed', __FILE__, __LINE__); } return false; }
function Threshold(&$gdimg, $cutoff) { $cutoff = $cutoff ? $cutoff : 128; for ($x = 0; $x < ImageSX($gdimg); $x++) { for ($y = 0; $y < ImageSY($gdimg); $y++) { $currentPixel = phpthumb_functions::GetPixelColor($gdimg, $x, $y); $grayPixel = phpthumb_functions::GrayscalePixel($currentPixel); if ($grayPixel['red'] < $cutoff) { $newColor = phpthumb_functions::ImageColorAllocateAlphaSafe($gdimg, 0x0, 0x0, 0x0, $currentPixel['alpha']); } else { $newColor = phpthumb_functions::ImageColorAllocateAlphaSafe($gdimg, 0xff, 0xff, 0xff, $currentPixel['alpha']); } ImageSetPixel($gdimg, $x, $y, $newColor); } } return true; }