void UndoTransaction::autocropSprite(int bgcolor)
{
int old_frame = m_sprite->getCurrentFrame();
int x1, y1, x2, y2;
int u1, v1, u2, v2;
x1 = y1 = INT_MAX;
x2 = y2 = INT_MIN;
Image* image = Image::create(m_sprite->getPixelFormat(),
m_sprite->getWidth(),
m_sprite->getHeight());
for (int frame=0; frame<m_sprite->getTotalFrames(); ++frame) {
m_sprite->setCurrentFrame(frame);
m_sprite->render(image, 0, 0);
// TODO configurable (what color pixel to use as "refpixel",
// here we are using the top-left pixel by default)
if (image_shrink_rect(image, &u1, &v1, &u2, &v2,
image_getpixel(image, 0, 0))) {
x1 = MIN(x1, u1);
y1 = MIN(y1, v1);
x2 = MAX(x2, u2);
y2 = MAX(y2, v2);
}
}
m_sprite->setCurrentFrame(old_frame);
image_free(image);
// do nothing
if (x1 > x2 || y1 > y2)
return;
cropSprite(gfx::Rect(x1, y1, x2-x1+1, y2-y1+1), bgcolor);
}
void DocumentApi::trimSprite(Sprite* sprite, int bgcolor)
{
gfx::Rect bounds;
UniquePtr<Image> image_wrap(Image::create(sprite->getPixelFormat(),
sprite->getWidth(),
sprite->getHeight()));
Image* image = image_wrap.get();
for (FrameNumber frame(0); frame<sprite->getTotalFrames(); ++frame) {
image->clear(0);
sprite->render(image, 0, 0, frame);
// TODO configurable (what color pixel to use as "refpixel",
// here we are using the top-left pixel by default)
gfx::Rect frameBounds;
if (image_shrink_rect(image, frameBounds, image_getpixel(image, 0, 0)))
bounds = bounds.createUnion(frameBounds);
}
if (!bounds.isEmpty())
cropSprite(sprite, bounds, bgcolor);
}
