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/*
* Copyright (C) 2008 Emweb bvba, Kessel-Lo, Belgium.
*
* See the LICENSE file for terms of use.
*/
#include <stdio.h>
#include "gd.h"
#include <Wt/WMemoryResource>
#include "CornerImage.h"
CornerImage::CornerImage(Corner c, WColor fg, WColor bg,
int radius, WContainerWidget *parent)
: WImage(parent),
corner_(c),
fg_(fg),
bg_(bg),
radius_(radius),
resource_(0)
{
compute();
}
CornerImage::~CornerImage()
{
if (resource_) {
delete resource_;
}
}
void CornerImage::setRadius(int radius)
{
if (radius != radius_) {
radius_ = radius;
compute();
}
}
void CornerImage::setForeground(WColor color)
{
if (fg_ != color) {
fg_ = color;
compute();
}
}
void CornerImage::compute()
{
/* We want an anti-aliased image: oversample twice */
int AA = 2;
gdImagePtr imBig = gdImageCreate(radius_ * AA, radius_ * AA);
/* automatically becomes the background color -- gd documentation */
gdImageColorAllocate(imBig, bg_.red(), bg_.green(), bg_.blue());
int fgColor
= gdImageColorAllocate(imBig, fg_.red(), fg_.green(), fg_.blue());
int cx, cy;
if (corner_ & Top)
cy = radius_ * AA - 1;
else
cy = 0;
if (corner_ & Left)
cx = radius_ * AA - 1;
else
cx = 0;
gdImageFilledArc(imBig, cx, cy, (radius_*2 - 1) * AA, (radius_*2 - 1) * AA,
0, 360, fgColor, gdArc);
/* now create the real image, downsampled by a factor of 2 */
gdImagePtr im = gdImageCreateTrueColor(radius_, radius_);
gdImageCopyResampled(im, imBig, 0, 0, 0, 0, im->sx, im->sy,
imBig->sx, imBig->sy);
/* and generate an in-memory png file */
int size;
unsigned char *data;
data = (unsigned char *) gdImagePngPtr(im, &size);
if (!data) {
return;
/* Error */
}
std::vector<unsigned char> vdata(data, data + size);
if (resource_) {
resource_->setData(vdata);
} else {
/* create and set the memory resource that contains the image */
resource_ = new WMemoryResource("image/png", vdata);
setResource(resource_);
}
gdFree(data);
gdImageDestroy(im);
gdImageDestroy(imBig);
}
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