File Source for gd.class.php

<?php
/*
* This work is hereby released into the Public Domain.
* To view a copy of the public domain dedication,
* visit http://creativecommons.org/licenses/publicdomain/ or send a letter to
* Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
*
*/
require_once dirname(__FILE__)."/../Driver.class.php";
/**
* Draw your objects
*
* @package linea21.externals
* @subpackage artichow
*/
class awGDDriver extends Driver {
/**
* A GD resource
*
* @var $resource
*/
var $resource;
function awGDDriver() {
parent::Driver();
$this->driverString = 'gd';
}
function init(&$image) {
if($this->resource === NULL) {
$this->setImageSize($image->width, $image->height);
// Create image
$this->resource = imagecreatetruecolor($this->imageWidth, $this->imageHeight);
if(!$this->resource) {
awImage::drawError("Class Image: Unable to create a graph.");
}
imagealphablending($this->resource, TRUE);
// Antialiasing is now handled by the Driver object
$this->setAntiAliasing($image->getAntiAliasing());
// Original color
$this->filledRectangle(
new awWhite,
new awLine(
new awPoint(0, 0),
new awPoint($this->imageWidth, $this->imageHeight)
)
);
$shadow = $image->shadow;
if($shadow !== NULL) {
$shadow = $shadow->getSpace();
$p1 = new awPoint($shadow->left, $shadow->top);
$p2 = new awPoint($this->imageWidth - $shadow->right - 1, $this->imageHeight - $shadow->bottom - 1);
// Draw image background
$this->filledRectangle($image->getBackground(), new awLine($p1, $p2));
// Draw image border
$image->border->rectangle($this, $p1, $p2);
}
}
}
function initFromFile(&$fileImage, $file) {
$image = @getimagesize((string)$file);
if($image and in_array($image[2], array(2, 3))) {
$fileImage->setSize($image[0], $image[1]);
switch($image[2]) {
case 2 :
$this->resource = imagecreatefromjpeg($file);
break;
case 3 :
$this->resource = imagecreatefrompng($file);
break;
}
$this->setImageSize($fileImage->width, $fileImage->height);
} else {
awImage::drawError("Class FileImage: Artichow does not support the format of this image (must be in PNG or JPEG)");
}
}
function setImageSize($width, $height) {
$this->imageWidth = $width;
$this->imageHeight = $height;
}
function setPosition($x, $y) {
// Calculate absolute position
$this->x = round($x * $this->imageWidth - $this->w / 2);
$this->y = round($y * $this->imageHeight - $this->h / 2);
}
function setAbsPosition($x, $y) {
$this->x = $x;
$this->y = $y;
}
function movePosition($x, $y) {
$this->x += (int)$x;
$this->y += (int)$y;
}
function setSize($w, $h) {
// Calcul absolute size
$this->w = round($w * $this->imageWidth);
$this->h = round($h * $this->imageHeight);
return $this->getSize();
}
function setAbsSize($w, $h) {
$this->w = $w;
$this->h = $h;
return $this->getSize();
}
function getSize() {
return array($this->w, $this->h);
}
function setAntiAliasing($bool) {
if(function_exists('imageantialias')) {
imageantialias($this->resource, (bool)$bool);
$this->antiAliasing = (bool)$bool;
} elseif($bool == true) {
awImage::drawErrorFile('missing-anti-aliasing');
}
}
function getColor($color) {
if($color->alpha === 0 or function_exists('imagecolorallocatealpha') === FALSE) {
$gdColor = imagecolorallocate($this->resource, $color->red, $color->green, $color->blue);
} else {
$gdColor = imagecolorallocatealpha($this->resource, $color->red, $color->green, $color->blue, $color->alpha);
}
return $gdColor;
}
function copyImage(&$image, $p1, $p2) {
list($x1, $y1) = $p1->getLocation();
list($x2, $y2) = $p2->getLocation();
$driver = $image->getDriver();
imagecopy($this->resource, $driver->resource, $this->x + $x1, $this->y + $y1, 0, 0, $x2 - $x1, $y2 - $y1);
}
function copyResizeImage(&$image, $d1, $d2, $s1, $s2, $resample = TRUE) {
if($resample) {
$function = 'imagecopyresampled';
} else {
$function = 'imagecopyresized';
}
$driver = $image->getDriver();
$function(
$this->resource,
$driver->resource,
$this->x + $d1->x, $this->y + $d1->y,
$s1->x, $s1->y,
$d2->x - $d1->x, $d2->y - $d1->y,
$s2->x - $s1->x, $s2->y - $s1->y
);
}
function string(&$text, $point, $width = NULL) {
$font = $text->getFont();
// Can we deal with that font?
if($this->isCompatibleWithFont($font) === FALSE) {
awImage::drawError('Class GDDriver: Incompatible font type (\''.get_class($font).'\')');
}
// Check which FontDriver to use
if(is_a($font, 'awPHPFont')) {
$fontDriver = $this->phpFontDriver;
} else {
$fontDriver = $this->fileFontDriver;
}
if($text->getBackground() !== NULL or $text->border->visible()) {
list($left, $right, $top, $bottom) = $text->getPadding();
$textWidth = $fontDriver->getTextWidth($text, $this);
$textHeight = $fontDriver->getTextHeight($text, $this);
$x1 = floor($point->x - $left);
$y1 = floor($point->y - $top);
$x2 = $x1 + $textWidth + $left + $right;
$y2 = $y1 + $textHeight + $top + $bottom;
$this->filledRectangle(
$text->getBackground(),
awLine::build($x1, $y1, $x2, $y2)
);
$text->border->rectangle(
$this,
new awPoint($x1 - 1, $y1 - 1),
new awPoint($x2 + 1, $y2 + 1)
);
}
$fontDriver->string($this, $text, $point, $width);
}
function point($color, $p) {
if($p->isHidden() === FALSE) {
$rgb = $this->getColor($color);
imagesetpixel($this->resource, $this->x + round($p->x), $this->y + round($p->y), $rgb);
}
}
function line($color, $line) {
if($line->thickness > 0 and $line->isHidden() === FALSE) {
$rgb = $this->getColor($color);
$thickness = $line->thickness;
list($p1, $p2) = $line->getLocation();
$this->startThickness($thickness);
switch($line->getStyle()) {
case LINE_SOLID :
imageline($this->resource, $this->x + round($p1->x), $this->y + round($p1->y), $this->x + round($p2->x), $this->y + round($p2->y), $rgb);
break;
case LINE_DOTTED :
$size = sqrt(pow($p2->y - $p1->y, 2) + pow($p2->x - $p1->x, 2));
$cos = ($p2->x - $p1->x) / $size;
$sin = ($p2->y - $p1->y) / $size;
for($i = 0; $i <= $size; $i += 2) {
$p = new awPoint(
round($i * $cos + $p1->x),
round($i * $sin + $p1->y)
);
$this->point($color, $p);
}
break;
case LINE_DASHED :
$width = $p2->x - $p1->x;
$height = $p2->y - $p1->y;
$size = sqrt(pow($height, 2) + pow($width, 2));
if($size == 0) {
return;
}
$cos = $width / $size;
$sin = $height / $size;
$functionX = ($width > 0) ? 'min' : 'max';
$functionY = ($height > 0) ? 'min' : 'max';
for($i = 0; $i <= $size; $i += 6) {
$t1 = new awPoint(
round($i * $cos + $p1->x),
round($i * $sin + $p1->y)
);
$t2 = new awPoint(
round($functionX(($i + 3) * $cos, $width) + $p1->x),
round($functionY(($i + 3) * $sin, $height) + $p1->y)
);
$this->line($color, new awLine($t1, $t2));
}
break;
}
$this->stopThickness($thickness);
}
}
function arc($color, $center, $width, $height, $from, $to) {
imagefilledarc(
$this->resource,
$this->x + $center->x, $this->y + $center->y,
$width, $height,
$from, $to,
$this->getColor($color),
IMG_ARC_EDGED | IMG_ARC_NOFILL
);
}
function filledArc($color, $center, $width, $height, $from, $to) {
imagefilledarc(
$this->resource,
$this->x + $center->x, $this->y + $center->y,
$width, $height,
$from, $to,
$this->getColor($color),
IMG_ARC_PIE
);
}
function ellipse($color, $center, $width, $height) {
list($x, $y) = $center->getLocation();
$rgb = $this->getColor($color);
imageellipse(
$this->resource,
$this->x + $x,
$this->y + $y,
$width,
$height,
$rgb
);
}
function filledEllipse($background, $center, $width, $height) {
if(is_a($background, 'awColor')) {
list($x, $y) = $center->getLocation();
$rgb = $this->getColor($background);
imagefilledellipse(
$this->resource,
$this->x + $x,
$this->y + $y,
$width,
$height,
$rgb
);
} else if(is_a($background, 'awGradient')) {
list($x, $y) = $center->getLocation();
$x1 = $x - round($width / 2);
$y1 = $y - round($height / 2);
$x2 = $x1 + $width;
$y2 = $y1 + $height;
$gradientDriver = new awGDGradientDriver($this);
$gradientDriver->filledEllipse(
$background,
$x1, $y1,
$x2, $y2
);
}
}
function rectangle($color, $line) {
list($p1, $p2) = $line->getLocation();
switch($line->getStyle()) {
case LINE_SOLID :
$thickness = $line->getThickness();
$this->startThickness($thickness);
$rgb = $this->getColor($color);
imagerectangle($this->resource, $this->x + $p1->x, $this->y + $p1->y, $this->x + $p2->x, $this->y + $p2->y, $rgb);
$this->stopThickness($thickness);
break;
default :
$side = new Line($p1, $p2);
// Top side
$side->setLocation(
new awPoint($p1->x, $p1->y),
new awPoint($p2->x, $p1->y)
);
$this->line($color, $side);
// Right side
$side->setLocation(
new awPoint($p2->x, $p1->y),
new awPoint($p2->x, $p2->y)
);
$this->line($color, $side);
// Bottom side
$side->setLocation(
new awPoint($p1->x, $p2->y),
new awPoint($p2->x, $p2->y)
);
$this->line($color, $side);
// Left side
$side->setLocation(
new awPoint($p1->x, $p1->y),
new awPoint($p1->x, $p2->y)
);
$this->line($color, $side);
break;
}
}
function filledRectangle($background, $line) {
$p1 = $line->p1;
$p2 = $line->p2;
if(is_a($background, 'awColor')) {
$rgb = $this->getColor($background);
imagefilledrectangle($this->resource, $this->x + $p1->x, $this->y + $p1->y, $this->x + $p2->x, $this->y + $p2->y, $rgb);
} else if(is_a($background, 'awGradient')) {
$gradientDriver = new awGDGradientDriver($this);
$gradientDriver->filledRectangle($background, $p1, $p2);
}
}
function polygon($color, &$polygon) {
switch($polygon->getStyle()) {
case POLYGON_SOLID :
$thickness = $polygon->getThickness();
$this->startThickness($thickness);
$points = $this->getPolygonPoints($polygon);
$rgb = $this->getColor($color);
imagepolygon($this->resource, $points, $polygon->count(), $rgb);
$this->stopThickness($thickness);
break;
default :
if($polygon->count() > 1) {
$prev = $polygon->get(0);
$line = new awLine;
$line->setStyle($polygon->getStyle());
$line->setThickness($polygon->getThickness());
for($i = 1; $i < $polygon->count(); $i++) {
$current = $polygon->get($i);
$line->setLocation($prev, $current);
$this->line($color, $line);
$prev = $current;
}
// Close the polygon
$line->setLocation($prev, $polygon->get(0));
$this->line($color, $line);
}
}
}
function filledPolygon($background, &$polygon) {
if(is_a($background, 'awColor')) {
$points = $this->getPolygonPoints($polygon);
$rgb = $this->getColor($background);
imagefilledpolygon($this->resource, $points, $polygon->count(), $rgb);
} else if(is_a($background, 'awGradient')) {
$gradientDriver = new awGDGradientDriver($this);
$gradientDriver->filledPolygon($background, $polygon);
}
}
function send(&$image) {
$this->drawImage($image);
}
function get(&$image) {
return $this->drawImage($image, TRUE, FALSE);
}
function getTextWidth(&$text) {
$font = $text->getFont();
if(is_a($font, 'awPHPFont')) {
$fontDriver = $this->phpFontDriver;
} else {
$fontDriver = $this->fileFontDriver;
}
return $fontDriver->getTextWidth($text, $this);
}
function getTextHeight(&$text) {
$font = $text->getFont();
if(is_a($font, 'awPHPFont')) {
$fontDriver = $this->phpFontDriver;
} else {
$fontDriver = $this->fileFontDriver;
}
return $fontDriver->getTextHeight($text, $this);
}
function isCompatibleWithFont(&$font) {
if(is_a($font, 'awFDBFont')) {
return FALSE;
} else {
return TRUE;
}
}
function drawImage(&$image, $return = FALSE, $header = TRUE) {
$format = $image->getFormatString();
// Test if format is available
if((imagetypes() & $image->getFormat()) === FALSE) {
awImage::drawError("Class Image: Format '".$format."' is not available on your system. Check that your PHP has been compiled with the good libraries.");
}
// Get some infos about this image
switch($format) {
case 'jpeg' :
$function = 'imagejpeg';
break;
case 'png' :
$function = 'imagepng';
break;
case 'gif' :
$function = 'imagegif';
break;
}
// Send headers to the browser
if($header === TRUE) {
$image->sendHeaders();
}
if($return) {
ob_start();
}
$function($this->resource);
if($return) {
return ob_get_clean();
}
}
function getPolygonPoints(&$polygon) {
$points = array();
foreach($polygon->all() as $point) {
$points[] = $point->x + $this->x;
$points[] = $point->y + $this->y;
}
return $points;
}
function startThickness($thickness) {
if($thickness > 1) {
// Beurk :'(
if($this->antiAliasing and function_exists('imageantialias')) {
imageantialias($this->resource, FALSE);
}
imagesetthickness($this->resource, $thickness);
}
}
function stopThickness($thickness) {
if($thickness > 1) {
if($this->antiAliasing and function_exists('imageantialias')) {
imageantialias($this->resource, TRUE);
}
imagesetthickness($this->resource, 1);
}
}
}
registerClass('GDDriver');
/**
* To your gradients
*
* @package linea21.externals
* @subpackage artichow
*/
class awGDGradientDriver {
/**
* A driver
*
* @var awGDDriver
*/
var $driver;
/**
* Build your GDGradientDriver
*
* @var $driver
*/
function awGDGradientDriver($driver) {
$this->driver = $driver;
}
function drawFilledFlatTriangle($gradient, $a, $b, $c) {
if($gradient->angle !== 0) {
awImage::drawError("Class GDGradientDriver: Flat triangles can only be used with 0 degree gradients.");
}
// Look for right-angled triangle
if($a->x !== $b->x and $b->x !== $c->x) {
awImage::drawError("Class GDGradientDriver: Not right-angled flat triangles are not supported yet.");
}
if($a->x === $b->x) {
$d = $a;
$e = $c;
} else {
$d = $c;
$e = $a;
}
$this->init($gradient, $b->y - $d->y);
for($i = $c->y + 1; $i < $b->y; $i++) {
$color = $this->color($i - $d->y);
$pos = ($i - $d->y) / ($b->y - $d->y);
$p1 = new awPoint($e->x, $i);
$p2 = new awPoint(1 + floor($e->x - $pos * ($e->x - $d->x)), $i);
$this->driver->filledRectangle($color, new awLine($p1, $p2));
unset($color);
}
}
function drawFilledTriangle($gradient, &$polygon) {
if($gradient->angle === 0) {
$this->drawFilledTriangleVertically($gradient, $polygon);
} elseif($gradient->angle === 90) {
$this->drawFilledTriangleHorizontally($gradient, $polygon);
}
}
function drawFilledTriangleVertically($gradient, &$polygon) {
list($yMin, $yMax) = $polygon->getBoxYRange();
$this->init($gradient, $yMax - $yMin);
// Get the triangle line we will draw our lines from
$fromLine = NULL;
$lines = $polygon->getLines();
$count = count($lines);
// Pick the side of the triangle going from the top
// to the bottom of the surrounding box
for($i = 0; $i < $count; $i++) {
if($lines[$i]->isTopToBottom($polygon)) {
list($fromLine) = array_splice($lines, $i, 1);
break;
}
}
// If for some reason the three points are aligned,
// $fromLine will still be NULL
if($fromLine === NULL) {
return;
}
$fillLine = NULL;
for($y = round($yMin); $y < round($yMax); $y++) {
$fromX = $fromLine->getXFrom($y);
$toX = array();
foreach($lines as $line) {
$xValue = $line->getXFrom($y);
if(!is_null($xValue)) {
$toX[] = $xValue;
}
}
if(count($toX) === 1) {
$fillLine = new Line(
new Point($fromX, $y),
new Point($toX[0], $y)
);
} else {
$line1 = new Line(
new Point($fromX, $y),
new Point($toX[0], $y)
);
$line2 = new Line(
new Point($fromX, $y),
new Point($toX[1], $y)
);
if($line1->getSize() < $line2->getSize()) {
$fillLine = $line1;
} else {
$fillLine = $line2;
}
}
if(!$fillLine->isPoint()) {
$color = $this->color($y - $yMin);
$this->driver->line($color, $fillLine);
unset($color);
}
}
}
function drawFilledTriangleHorizontally($gradient, &$polygon) {
list($xMin, $xMax) = $polygon->getBoxXRange();
$this->init($gradient, $xMax - $xMin);
// Get the triangle line we will draw our lines from
$fromLine = NULL;
$lines = $polygon->getLines();
$count = count($lines);
// Pick the side of the triangle going all the way
// from the left side to the right side of the surrounding box
for($i = 0; $i < $count; $i++) {
if($lines[$i]->isLeftToRight($polygon)) {
list($fromLine) = array_splice($lines, $i, 1);
break;
}
}
// If for some reason the three points are aligned,
// $fromLine will still be NULL
if($fromLine === NULL) {
return;
}
$fillLine = NULL;
for($x = round($xMin); $x < round($xMax); $x++) {
$fromY = floor($fromLine->getYFrom($x));
$toY = array();
foreach($lines as $line) {
$yValue = $line->getYFrom($x);
if(!is_null($yValue)) {
$toY[] = floor($yValue);
}
}
if(count($toY) === 1) {
$fillLine = new Line(
new Point($x, $fromY),
new Point($x, $toY[0])
);
} else {
$line1 = new Line(
new Point($x, $fromY),
new Point($x, $toY[0])
);
$line2 = new Line(
new Point($x, $fromY),
new Point($x, $toY[1])
);
if($line1->getSize() < $line2->getSize()) {
$fillLine = $line1;
} else {
$fillLine = $line2;
}
}
$color = $this->color($x - $xMin);
if($fillLine->isPoint()) {
$this->driver->point($color, $fillLine->p1);
} elseif($fillLine->getSize() >= 1) {
$this->driver->line($color, $fillLine);
}
unset($color);
}
}
function filledRectangle($gradient, $p1, $p2) {
list($x1, $y1) = $p1->getLocation();
list($x2, $y2) = $p2->getLocation();
if($y1 < $y2) {
$y1 ^= $y2 ^= $y1 ^= $y2;
}
if($x2 < $x1) {
$x1 ^= $x2 ^= $x1 ^= $x2;
}
if(is_a($gradient, 'awLinearGradient')) {
$this->rectangleLinearGradient($gradient, new awPoint($x1, $y1), new awPoint($x2, $y2));
} else {
awImage::drawError("Class GDGradientDriver: This gradient is not supported by rectangles.");
}
}
function filledPolygon($gradient, &$polygon) {
if(is_a($gradient, 'awLinearGradient')) {
$this->polygonLinearGradient($gradient, $polygon);
} else {
awImage::drawError("Class GDGradientDriver: This gradient is not supported by polygons.");
}
}
function rectangleLinearGradient(&$gradient, $p1, $p2) {
list($x1, $y1) = $p1->getLocation();
list($x2, $y2) = $p2->getLocation();
if($y1 - $y2 > 0) {
if($gradient->angle === 0) {
$this->init($gradient, $y1 - $y2);
for($i = $y2; $i <= $y1; $i++) {
$color = $this->color($i - $y2);
$p1 = new awPoint($x1, $i);
$p2 = new awPoint($x2, $i);
$this->driver->filledRectangle($color, new awLine($p1, $p2));
unset($color);
}
} else if($gradient->angle === 90) {
$this->init($gradient, $x2 - $x1);
for($i = $x1; $i <= $x2; $i++) {
$color = $this->color($i - $x1);
$p1 = new awPoint($i, $y2);
$p2 = new awPoint($i, $y1);
$this->driver->filledRectangle($color, new awLine($p1, $p2));
unset($color);
}
}
}
}
function filledEllipse($gradient, $x1, $y1, $x2, $y2) {
if($y1 < $y2) {
$y1 ^= $y2 ^= $y1 ^= $y2;
}
if($x2 < $x1) {
$x1 ^= $x2 ^= $x1 ^= $x2;
}
if(is_a($gradient, 'awRadialGradient')) {
$this->ellipseRadialGradient($gradient, $x1, $y1, $x2, $y2);
} else if(is_a($gradient, 'awLinearGradient')) {
$this->ellipseLinearGradient($gradient, $x1, $y1, $x2, $y2);
} else {
awImage::drawError("Class GDGradientDriver: This gradient is not supported by ellipses.");
}
}
function ellipseRadialGradient($gradient, $x1, $y1, $x2, $y2) {
if($y1 - $y2 > 0) {
if($y1 - $y2 != $x2 - $x1) {
awImage::drawError("Class GDGradientDriver: Radial gradients are only implemented on circle, not ellipses.");
}
$c = new awPoint($x1 + ($x2 - $x1) / 2, $y1 + ($y2 - $y1) / 2);
$r = ($x2 - $x1) / 2;
$ok = array();
// Init gradient
$this->init($gradient, $r);
for($i = 0; $i <= $r; $i += 0.45) {
$p = ceil((2 * M_PI * $i));
if($p > 0) {
$interval = 360 / $p;
} else {
$interval = 360;
}
$color = $this->color($i);
for($j = 0; $j < 360; $j += $interval) {
$rad = ($j / 360) * (2 * M_PI);
$x = round($i * cos($rad));
$y = round($i * sin($rad));
$l = sqrt($x * $x + $y * $y);
if($l <= $r) {
if(
array_key_exists((int)$x, $ok) === FALSE or
array_key_exists((int)$y, $ok[$x]) === FALSE
) {
// Print the point
$this->driver->point($color, new awPoint($c->x + $x, $c->y + $y));
$ok[(int)$x][(int)$y] = TRUE;
}
}
}
unset($color);
}
}
}
function ellipseLinearGradient($gradient, $x1, $y1, $x2, $y2) {
// Gauche->droite : 90°
if($y1 - $y2 > 0) {
if($y1 - $y2 != $x2 - $x1) {
awImage::drawError("Class GDGradientDriver: Linear gradients are only implemented on circle, not ellipses.");
}
$r = ($x2 - $x1) / 2;
// Init gradient
$this->init($gradient, $x2 - $x1);
for($i = -$r; $i <= $r; $i++) {
$h = sin(acos($i / $r)) * $r;
$color = $this->color($i + $r);
if($gradient->angle === 90) {
// Print the line
$p1 = new awPoint(
$x1 + $i + $r,
round(max($y2 + $r - $h + 1, $y2))
);
$p2 = new awPoint(
$x1 + $i + $r,
round(min($y1 - $r + $h - 1, $y1))
);
} else {
// Print the line
$p1 = new awPoint(
round(max($x1 + $r - $h + 1, $x1)),
$y2 + $i + $r
);
$p2 = new awPoint(
round(min($x2 - $r + $h - 1, $x2)),
$y2 + $i + $r
);
}
$this->driver->filledRectangle($color, new awLine($p1, $p2));
unset($color);
}
}
}
function polygonLinearGradient(&$gradient, &$polygon) {
$count = $polygon->count();
if($count >= 4) {
$left = $polygon->get(0);
$right = $polygon->get($count - 1);
if($gradient->angle === 0) {
// Get polygon maximum and minimum
$offset = $polygon->get(0);
$max = $min = $offset->y;
for($i = 1; $i < $count - 1; $i++) {
$offset = $polygon->get($i);
$max = max($max, $offset->y);
$min = min($min, $offset->y);
}
$this->init($gradient, $max - $min);
$prev = $polygon->get(1);
$sum = 0;
for($i = 2; $i < $count - 1; $i++) {
$current = $polygon->get($i);
$interval = 1;
if($i !== $count - 2) {
$current->x -= $interval;
}
if($current->x - $prev->x > 0) {
// Draw rectangle
$x1 = $prev->x;
$x2 = $current->x;
$y1 = max($prev->y, $current->y);
$y2 = $left->y;
$gradient = new awLinearGradient(
$this->color($max - $min - ($y2 - $y1)),
$this->color($max - $min),
0
);
if($y1 > $y2) {
$y2 = $y1;
}
$this->driver->filledRectangle(
$gradient,
awLine::build($x1, $y1, $x2, $y2)
);
$top = ($prev->y < $current->y) ? $current : $prev;
$bottom = ($prev->y >= $current->y) ? $current : $prev;
$gradient = new awLinearGradient(
$this->color($bottom->y - $min),
$this->color($max - $min - ($y2 - $y1)),
0
);
$gradientDriver = new awGDGradientDriver($this->driver);
$gradientDriver->drawFilledFlatTriangle(
$gradient,
new awPoint($prev->x, min($prev->y, $current->y)),
$top,
new awPoint($current->x, min($prev->y, $current->y))
);
unset($gradientDriver);
$sum += $current->x - $prev->x;
}
$prev = $current;
$prev->x += $interval;
}
} else if($gradient->angle === 90) {
$width = $right->x - $left->x;
$this->init($gradient, $width);
$pos = 1;
$next = $polygon->get($pos++);
$this->next($polygon, $pos, $prev, $next);
for($i = 0; $i <= $width; $i++) {
$x = $left->x + $i;
$y1 = round($prev->y + ($next->y - $prev->y) * (($i + $left->x - $prev->x) / ($next->x - $prev->x)));
$y2 = $left->y;
// Draw line
$color = $this->color($i);
// YaPB : PHP does not handle alpha on lines
$this->driver->filledRectangle($color, awLine::build($x, $y1, $x, $y2));
unset($color);
// Jump to next point
if($next->x == $i + $left->x) {
$this->next($polygon, $pos, $prev, $next);
}
}
}
} else if($count === 3) {
$this->drawFilledTriangle(
$gradient,
$polygon
);
}
}
function next($polygon, &$pos, &$prev, &$next) {
do {
$prev = $next;
$next = $polygon->get($pos++);
}
while($next->x - $prev->x == 0 and $pos < $polygon->count());
}
/**
* Start colors
*
* @var int
*/
var $r1, $g1, $b1, $a1;
/**
* Stop colors
*
* @var int
*/
var $r2, $g2, $b2, $a2;
/**
* Gradient size in pixels
*
* @var int
*/
var $size;
function init($gradient, $size) {
list(
$this->r1, $this->g1, $this->b1, $this->a1
) = $gradient->from->rgba();
list(
$this->r2, $this->g2, $this->b2, $this->a2
) = $gradient->to->rgba();
$this->size = $size;
}
function color($pos) {
return new awColor(
$this->getRed($pos),
$this->getGreen($pos),
$this->getBlue($pos),
$this->getAlpha($pos)
);
}
function getRed($pos) {
if((float)$this->size !== 0.0) {
return (int)round($this->r1 + ($pos / $this->size) * ($this->r2 - $this->r1));
} else {
return 0;
}
}
function getGreen($pos) {
if((float)$this->size !== 0.0) {
return (int)round($this->g1 + ($pos / $this->size) * ($this->g2 - $this->g1));
} else {
return 0;
}
}
function getBlue($pos) {
if((float)$this->size !== 0.0) {
return (int)round($this->b1 + ($pos / $this->size) * ($this->b2 - $this->b1));
} else {
return 0;
}
}
function getAlpha($pos) {
if((float)$this->size !== 0.0) {
return (int)round(($this->a1 + ($pos / $this->size) * ($this->a2 - $this->a1)) / 127 * 100);
} else {
return 0;
}
}
}
registerClass('GDGradientDriver');
/*
* Check for GD2
*/
if(function_exists('imagecreatetruecolor') === FALSE) {
awImage::drawErrorFile('missing-gd2');
}
?>

Source for file gd.class.php