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Improve NSDrawThreePartImage implementation

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@36827 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
ericwa 2013-07-03 22:03:59 +00:00
parent f9a2310183
commit 242003a698
1 changed files with 103 additions and 17 deletions
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120
Source/Functions.m
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@ -349,8 +349,8 @@ void NSDrawBitmap(NSRect rect,
/**
* Tiles an image in a rect, starting from the lower-left-hand corner
*/
static void GSDrawRepeatingImage(NSRect aRect, NSImage *image, NSCompositingOperation op,
CGFloat fraction, BOOL flipped)
static void GSDrawRepeatingImage2D(NSRect aRect, NSImage *image, NSCompositingOperation op,
CGFloat fraction, BOOL flipped)
{
const NSSize imageSize = [image size];
if (imageSize.width <= 0 ||
@ -393,26 +393,112 @@ static void GSDrawRepeatingImage(NSRect aRect, NSImage *image, NSCompositingOper
[NSGraphicsContext restoreGraphicsState];
}
static void GSDrawRepeatingImage1D(NSRect aRect, NSImage *image, BOOL isVertical,
NSCompositingOperation op,
CGFloat fraction, BOOL flipped)
{
const NSSize imageSize = [image size];
if (imageSize.width <= 0 ||
imageSize.height <= 0)
{
return;
}
[NSGraphicsContext saveGraphicsState];
NSRectClip(aRect);
{
const NSInteger num = isVertical ?
ceil(aRect.size.height / imageSize.height)
: ceil(aRect.size.width / imageSize.width);
NSInteger i;
if (num > 0)
{
for (i = 0; i < num; i++)
{
NSRect drawRect;
if (isVertical)
{
drawRect.size = NSMakeSize(aRect.size.width, imageSize.height);
drawRect.origin = NSMakePoint(aRect.origin.x,
flipped ? (NSMaxY(aRect) - ((i + 1) * imageSize.height))
: (aRect.origin.y + (i * imageSize.height)));
}
else
{
drawRect.size = NSMakeSize(imageSize.width, aRect.size.height);
drawRect.origin = NSMakePoint(aRect.origin.x + (i * imageSize.width),
aRect.origin.y);
}
[image drawInRect: drawRect
fromRect: NSZeroRect
operation: op
fraction: fraction
respectFlipped: YES
hints: nil];
}
}
}
[NSGraphicsContext restoreGraphicsState];
}
void NSDrawThreePartImage(NSRect aRect, NSImage *start, NSImage *middle,
NSImage *end, BOOL isVertical, NSCompositingOperation op,
CGFloat fraction, BOOL flipped)
{
NSRect startRect, middleRect, endRect;
NSView *focusView = [NSView focusView];
if (nil != focusView)
{
aRect = [focusView centerScanRect: aRect];
}
[NSGraphicsContext saveGraphicsState];
// Protects against the case when the smallest source image is larger than aRect
NSRectClip(aRect);
if (isVertical)
{
NSDrawNinePartImage(aRect,
nil, start, nil,
nil, middle, nil,
nil, end, nil,
op, fraction, flipped);
startRect.size = NSMakeSize(aRect.size.width,
[start size].height);
endRect.size = NSMakeSize(aRect.size.width,
[end size].height);
middleRect.size = NSMakeSize(aRect.size.width,
MAX(0, aRect.size.height -
startRect.size.height -
endRect.size.height));
endRect.origin = aRect.origin;
middleRect.origin = NSMakePoint(aRect.origin.x, NSMaxY(endRect));
startRect.origin = NSMakePoint(aRect.origin.x, NSMaxY(middleRect));
}
else
{
NSDrawNinePartImage(aRect,
nil, nil, nil,
start, middle, end,
nil, nil, nil,
op, fraction, flipped);
startRect.size = NSMakeSize([start size].width,
aRect.size.height);
endRect.size = NSMakeSize([end size].width,
aRect.size.height);
middleRect.size = NSMakeSize(MAX(0, aRect.size.width -
startRect.size.width -
endRect.size.width),
aRect.size.height);
startRect.origin = aRect.origin;
middleRect.origin = NSMakePoint(NSMaxX(startRect), aRect.origin.y);
endRect.origin = NSMakePoint(NSMaxX(middleRect), aRect.origin.y);
}
[start drawInRect: startRect fromRect: NSZeroRect operation: op fraction: fraction respectFlipped: YES hints: nil];
GSDrawRepeatingImage1D(middleRect, middle, isVertical, op, fraction, flipped);
[end drawInRect: endRect fromRect: NSZeroRect operation: op fraction: fraction respectFlipped: YES hints: nil];
[NSGraphicsContext restoreGraphicsState]; // Restore clipping region
}
@ -516,13 +602,13 @@ void NSDrawNinePartImage(NSRect aRect, NSImage *topLeft, NSImage *topMiddle,
// Draw the images left-to-right, bottom-to-top
[bottomLeft drawInRect: bottomLeftRect fromRect: NSZeroRect operation: op fraction: fraction respectFlipped: YES hints: nil];
GSDrawRepeatingImage(bottomMiddleRect, bottomMiddle, op, fraction, flipped);
GSDrawRepeatingImage2D(bottomMiddleRect, bottomMiddle, op, fraction, flipped);
[bottomRight drawInRect: bottomRightRect fromRect: NSZeroRect operation: op fraction: fraction respectFlipped: YES hints: nil];
GSDrawRepeatingImage(centerLeftRect, centerLeft, op, fraction, flipped);
GSDrawRepeatingImage(centerMiddleRect, centerMiddle, op, fraction, flipped);
GSDrawRepeatingImage(centerRightRect, centerRight, op, fraction, flipped);
GSDrawRepeatingImage2D(centerLeftRect, centerLeft, op, fraction, flipped);
GSDrawRepeatingImage2D(centerMiddleRect, centerMiddle, op, fraction, flipped);
GSDrawRepeatingImage2D(centerRightRect, centerRight, op, fraction, flipped);
[topLeft drawInRect: topLeftRect fromRect: NSZeroRect operation: op fraction: fraction respectFlipped: YES hints: nil];
GSDrawRepeatingImage(topMiddleRect, topMiddle, op, fraction, flipped);
GSDrawRepeatingImage2D(topMiddleRect, topMiddle, op, fraction, flipped);
[topRight drawInRect: topRightRect fromRect: NSZeroRect operation: op fraction: fraction respectFlipped: YES hints: nil];
}