// Draws a filled rectangle with a stroked border.
void GraphicsContext::drawRect(const IntRect& rect)
{
// FIXME: this function does not handle patterns and gradients
// like drawPath does, it probably should.
if (paintingDisabled())
return;
CGContextRef context = platformContext();
CGContextFillRect(context, rect);
if (strokeStyle() != NoStroke) {
// We do a fill of four rects to simulate the stroke of a border.
Color oldFillColor = fillColor();
if (oldFillColor != strokeColor())
setCGFillColor(context, strokeColor(), strokeColorSpace());
CGRect rects[4] = {
FloatRect(rect.x(), rect.y(), rect.width(), 1),
FloatRect(rect.x(), rect.bottom() - 1, rect.width(), 1),
FloatRect(rect.x(), rect.y() + 1, 1, rect.height() - 2),
FloatRect(rect.right() - 1, rect.y() + 1, 1, rect.height() - 2)
};
CGContextFillRects(context, rects, 4);
if (oldFillColor != strokeColor())
setCGFillColor(context, oldFillColor, fillColorSpace());
}
}
// Draws a filled rectangle with a stroked border.
void GraphicsContext::drawRect(const IntRect& rect)
{
if (paintingDisabled())
return;
CGContextRef context = platformContext();
if (fillColor().alpha())
CGContextFillRect(context, rect);
if (strokeStyle() != NoStroke && strokeColor().alpha()) {
// We do a fill of four rects to simulate the stroke of a border.
Color oldFillColor = fillColor();
if (oldFillColor != strokeColor())
setCGFillColor(context, strokeColor());
CGRect rects[4] = {
FloatRect(rect.x(), rect.y(), rect.width(), 1),
FloatRect(rect.x(), rect.bottom() - 1, rect.width(), 1),
FloatRect(rect.x(), rect.y() + 1, 1, rect.height() - 2),
FloatRect(rect.right() - 1, rect.y() + 1, 1, rect.height() - 2)
};
CGContextFillRects(context, rects, 4);
if (oldFillColor != strokeColor())
setCGFillColor(context, oldFillColor);
}
}
void GraphicsContext::fillRect(const FloatRect& rect, const Color& color)
{
if (paintingDisabled())
return;
if (color.alpha()) {
CGContextRef context = platformContext();
Color oldFillColor = fillColor();
if (oldFillColor != color)
setCGFillColor(context, color);
CGContextFillRect(context, rect);
if (oldFillColor != color)
setCGFillColor(context, oldFillColor);
}
}
void GraphicsContext::drawLineForText(const IntPoint& point, int width, bool printing)
{
if (paintingDisabled())
return;
if (width <= 0)
return;
float x = point.x();
float y = point.y();
float lineLength = width;
// Use a minimum thickness of 0.5 in user space.
// See http://bugs.webkit.org/show_bug.cgi?id=4255 for details of why 0.5 is the right minimum thickness to use.
float thickness = max(strokeThickness(), 0.5f);
bool restoreAntialiasMode = false;
if (!printing) {
// On screen, use a minimum thickness of 1.0 in user space (later rounded to an integral number in device space).
float adjustedThickness = max(thickness, 1.0f);
// FIXME: This should be done a better way.
// We try to round all parameters to integer boundaries in device space. If rounding pixels in device space
// makes our thickness more than double, then there must be a shrinking-scale factor and rounding to pixels
// in device space will make the underlines too thick.
CGRect lineRect = roundToDevicePixels(FloatRect(x, y, lineLength, adjustedThickness));
if (lineRect.size.height < thickness * 2.0) {
x = lineRect.origin.x;
y = lineRect.origin.y;
lineLength = lineRect.size.width;
thickness = lineRect.size.height;
if (shouldAntialias()) {
CGContextSetShouldAntialias(platformContext(), false);
restoreAntialiasMode = true;
}
}
}
if (fillColor() != strokeColor())
setCGFillColor(platformContext(), strokeColor(), strokeColorSpace());
CGContextFillRect(platformContext(), CGRectMake(x, y, lineLength, thickness));
if (fillColor() != strokeColor())
setCGFillColor(platformContext(), fillColor(), fillColorSpace());
if (restoreAntialiasMode)
CGContextSetShouldAntialias(platformContext(), true);
}
void GraphicsContext::fillRect(const FloatRect& rect, const Color& color, ColorSpace colorSpace)
{
if (paintingDisabled())
return;
CGContextRef context = platformContext();
Color oldFillColor = fillColor();
ColorSpace oldColorSpace = fillColorSpace();
if (oldFillColor != color || oldColorSpace != colorSpace)
setCGFillColor(context, color, colorSpace);
CGContextFillRect(context, rect);
if (oldFillColor != color || oldColorSpace != colorSpace)
setCGFillColor(context, oldFillColor, oldColorSpace);
}
void GraphicsContext::fillRoundedRect(const IntRect& rect, const IntSize& topLeft, const IntSize& topRight, const IntSize& bottomLeft, const IntSize& bottomRight, const Color& color)
{
if (paintingDisabled() || !color.alpha())
return;
CGContextRef context = platformContext();
Color oldFillColor = fillColor();
if (oldFillColor != color)
setCGFillColor(context, color);
// Add the four ellipses to the path. Technically this really isn't good enough, since we could end up
// not clipping the other 3/4 of the ellipse we don't care about. We're relying on the fact that for
// normal use cases these ellipses won't overlap one another (or when they do the curvature of one will
// be subsumed by the other).
CGContextAddEllipseInRect(context, CGRectMake(rect.x(), rect.y(), topLeft.width() * 2, topLeft.height() * 2));
CGContextAddEllipseInRect(context, CGRectMake(rect.right() - topRight.width() * 2, rect.y(),
topRight.width() * 2, topRight.height() * 2));
CGContextAddEllipseInRect(context, CGRectMake(rect.x(), rect.bottom() - bottomLeft.height() * 2,
bottomLeft.width() * 2, bottomLeft.height() * 2));
CGContextAddEllipseInRect(context, CGRectMake(rect.right() - bottomRight.width() * 2,
rect.bottom() - bottomRight.height() * 2,
bottomRight.width() * 2, bottomRight.height() * 2));
// Now add five rects (one for each edge rect in between the rounded corners and one for the interior).
CGContextAddRect(context, CGRectMake(rect.x() + topLeft.width(), rect.y(),
rect.width() - topLeft.width() - topRight.width(),
max(topLeft.height(), topRight.height())));
CGContextAddRect(context, CGRectMake(rect.x() + bottomLeft.width(),
rect.bottom() - max(bottomLeft.height(), bottomRight.height()),
rect.width() - bottomLeft.width() - bottomRight.width(),
max(bottomLeft.height(), bottomRight.height())));
CGContextAddRect(context, CGRectMake(rect.x(), rect.y() + topLeft.height(),
max(topLeft.width(), bottomLeft.width()), rect.height() - topLeft.height() - bottomLeft.height()));
CGContextAddRect(context, CGRectMake(rect.right() - max(topRight.width(), bottomRight.width()),
rect.y() + topRight.height(),
max(topRight.width(), bottomRight.width()), rect.height() - topRight.height() - bottomRight.height()));
CGContextAddRect(context, CGRectMake(rect.x() + max(topLeft.width(), bottomLeft.width()),
rect.y() + max(topLeft.height(), topRight.height()),
rect.width() - max(topLeft.width(), bottomLeft.width()) - max(topRight.width(), bottomRight.width()),
rect.height() - max(topLeft.height(), topRight.height()) - max(bottomLeft.height(), bottomRight.height())));
CGContextFillPath(context);
if (oldFillColor != color)
setCGFillColor(context, oldFillColor);
}
void GraphicsContext::fillRoundedRect(const IntRect& rect, const IntSize& topLeft, const IntSize& topRight, const IntSize& bottomLeft, const IntSize& bottomRight, const Color& color, ColorSpace colorSpace)
{
if (paintingDisabled())
return;
CGContextRef context = platformContext();
Color oldFillColor = fillColor();
ColorSpace oldColorSpace = fillColorSpace();
if (oldFillColor != color || oldColorSpace != colorSpace)
setCGFillColor(context, color, colorSpace);
Path path;
path.addRoundedRect(rect, topLeft, topRight, bottomLeft, bottomRight);
fillPath(path);
if (oldFillColor != color || oldColorSpace != colorSpace)
setCGFillColor(context, oldFillColor, oldColorSpace);
}
// This is only used to draw borders.
void GraphicsContext::drawLine(const IntPoint& point1, const IntPoint& point2)
{
if (paintingDisabled())
return;
if (strokeStyle() == NoStroke)
return;
float width = strokeThickness();
FloatPoint p1 = point1;
FloatPoint p2 = point2;
bool isVerticalLine = (p1.x() == p2.x());
// For odd widths, we add in 0.5 to the appropriate x/y so that the float arithmetic
// works out. For example, with a border width of 3, KHTML will pass us (y1+y2)/2, e.g.,
// (50+53)/2 = 103/2 = 51 when we want 51.5. It is always true that an even width gave
// us a perfect position, but an odd width gave us a position that is off by exactly 0.5.
if (strokeStyle() == DottedStroke || strokeStyle() == DashedStroke) {
if (isVerticalLine) {
p1.move(0, width);
p2.move(0, -width);
} else {
p1.move(width, 0);
p2.move(-width, 0);
}
}
if (((int)width) % 2) {
if (isVerticalLine) {
// We're a vertical line. Adjust our x.
p1.move(0.5f, 0.0f);
p2.move(0.5f, 0.0f);
} else {
// We're a horizontal line. Adjust our y.
p1.move(0.0f, 0.5f);
p2.move(0.0f, 0.5f);
}
}
int patWidth = 0;
switch (strokeStyle()) {
case NoStroke:
case SolidStroke:
break;
case DottedStroke:
patWidth = (int)width;
break;
case DashedStroke:
patWidth = 3 * (int)width;
break;
}
CGContextRef context = platformContext();
if (shouldAntialias())
CGContextSetShouldAntialias(context, false);
if (patWidth) {
CGContextSaveGState(context);
// Do a rect fill of our endpoints. This ensures we always have the
// appearance of being a border. We then draw the actual dotted/dashed line.
setCGFillColor(context, strokeColor(), strokeColorSpace()); // The save/restore make it safe to mutate the fill color here without setting it back to the old color.
if (isVerticalLine) {
CGContextFillRect(context, FloatRect(p1.x() - width / 2, p1.y() - width, width, width));
CGContextFillRect(context, FloatRect(p2.x() - width / 2, p2.y(), width, width));
} else {
CGContextFillRect(context, FloatRect(p1.x() - width, p1.y() - width / 2, width, width));
CGContextFillRect(context, FloatRect(p2.x(), p2.y() - width / 2, width, width));
}
// Example: 80 pixels with a width of 30 pixels.
// Remainder is 20. The maximum pixels of line we could paint
// will be 50 pixels.
int distance = (isVerticalLine ? (point2.y() - point1.y()) : (point2.x() - point1.x())) - 2*(int)width;
int remainder = distance % patWidth;
int coverage = distance - remainder;
int numSegments = coverage / patWidth;
float patternOffset = 0.0f;
// Special case 1px dotted borders for speed.
if (patWidth == 1)
patternOffset = 1.0f;
else {
bool evenNumberOfSegments = !(numSegments % 2);
if (remainder)
evenNumberOfSegments = !evenNumberOfSegments;
if (evenNumberOfSegments) {
if (remainder) {
patternOffset += patWidth - remainder;
patternOffset += remainder / 2;
} else
patternOffset = patWidth / 2;
} else {
if (remainder)
patternOffset = (patWidth - remainder)/2;
}
}
const CGFloat dottedLine[2] = { patWidth, patWidth };
CGContextSetLineDash(context, patternOffset, dottedLine, 2);
}
CGContextBeginPath(context);
CGContextMoveToPoint(context, p1.x(), p1.y());
CGContextAddLineToPoint(context, p2.x(), p2.y());
CGContextStrokePath(context);
if (patWidth)
CGContextRestoreGState(context);
if (shouldAntialias())
CGContextSetShouldAntialias(context, true);
}
void GraphicsContext::setPlatformFillColor(const Color& color, ColorSpace colorSpace)
{
if (paintingDisabled())
return;
setCGFillColor(platformContext(), color, colorSpace);
}