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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/awt/peer/gtk/BufferedImageGraphics.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/awt/peer/gtk/BufferedImageGraphics.java')
-rw-r--r-- | libjava/classpath/gnu/java/awt/peer/gtk/BufferedImageGraphics.java | 538 |
1 files changed, 538 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/awt/peer/gtk/BufferedImageGraphics.java b/libjava/classpath/gnu/java/awt/peer/gtk/BufferedImageGraphics.java new file mode 100644 index 000000000..f9609bff6 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/peer/gtk/BufferedImageGraphics.java @@ -0,0 +1,538 @@ +/* BufferedImageGraphics.java + Copyright (C) 2006 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.awt.peer.gtk; + +import java.awt.AlphaComposite; +import java.awt.Color; +import java.awt.Composite; +import java.awt.Graphics; +import java.awt.Graphics2D; +import java.awt.GraphicsConfiguration; +import java.awt.Image; +import java.awt.Rectangle; +import java.awt.Shape; +import java.awt.Toolkit; +import java.awt.font.GlyphVector; +import java.awt.geom.AffineTransform; +import java.awt.geom.Rectangle2D; +import java.awt.image.BufferedImage; +import java.awt.image.ColorModel; +import java.awt.image.DataBufferInt; +import java.awt.image.ImageObserver; +import java.awt.image.ImageProducer; +import java.awt.image.Raster; +import java.awt.image.RenderedImage; +import java.awt.image.SinglePixelPackedSampleModel; +import java.util.WeakHashMap; + +/** + * Implementation of Graphics2D on a Cairo surface. + * + * Simutanously maintains a CairoSurface and updates the + * BufferedImage from that after each drawing operation. + */ +public class BufferedImageGraphics extends CairoGraphics2D +{ + /** + * the buffered Image. + */ + private BufferedImage image, buffer; + + /** + * Image size. + */ + private int imageWidth, imageHeight; + + /** + * The cairo surface that we actually draw on. + */ + CairoSurface surface; + + /** + * Cache BufferedImageGraphics surfaces. + */ + static WeakHashMap<BufferedImage, CairoSurface> bufferedImages + = new WeakHashMap<BufferedImage, CairoSurface>(); + + /** + * Its corresponding cairo_t. + */ + private long cairo_t; + + private boolean hasFastCM; + private boolean hasAlpha; + + + public BufferedImageGraphics(BufferedImage bi) + { + this.image = bi; + imageWidth = bi.getWidth(); + imageHeight = bi.getHeight(); + + if (!(image.getSampleModel() instanceof SinglePixelPackedSampleModel)) + hasFastCM = false; + else if(bi.getColorModel().equals(CairoSurface.cairoCM_opaque)) + { + hasFastCM = true; + hasAlpha = false; + } + else if(bi.getColorModel().equals(CairoSurface.cairoColorModel) + || bi.getColorModel().equals(CairoSurface.cairoCM_pre)) + { + hasFastCM = true; + hasAlpha = true; + } + else + hasFastCM = false; + + // Cache surfaces. + if( bufferedImages.get( bi ) != null ) + surface = bufferedImages.get( bi ); + else + { + surface = new CairoSurface( imageWidth, imageHeight ); + bufferedImages.put(bi, surface); + } + + cairo_t = surface.newCairoContext(); + + // Get pixels out of buffered image and set in cairo surface + Raster raster = bi.getRaster(); + int[] pixels; + + if (hasFastCM) + { + SinglePixelPackedSampleModel sm = (SinglePixelPackedSampleModel)image.getSampleModel(); + int minX = image.getRaster().getSampleModelTranslateX(); + int minY = image.getRaster().getSampleModelTranslateY(); + + // Pull pixels directly out of data buffer + pixels = ((DataBufferInt)raster.getDataBuffer()).getData(); + + // Discard pixels that fall outside of the image's bounds + // (ie, this image is actually a subimage of a different image) + if (!(sm.getScanlineStride() == imageWidth && minX == 0 && minY == 0)) + { + int[] pixels2 = new int[imageWidth * imageHeight]; + int scanline = sm.getScanlineStride(); + + for (int i = 0; i < imageHeight; i++) + System.arraycopy(pixels, (i - minY) * scanline - minX, pixels2, + i * imageWidth, imageWidth); + + pixels = pixels2; + } + + // Fill the alpha channel as opaque if image does not have alpha + if( !hasAlpha ) + for(int i = 0; i < pixels.length; i++) + pixels[i] &= 0xFFFFFFFF; + } + else + { + pixels = CairoGraphics2D.findSimpleIntegerArray(image.getColorModel(), + image.getData()); + if (pixels != null) + System.arraycopy(pixels, 0, surface.getData(), + 0, pixels.length); + } + + setup( cairo_t ); + setClip(0, 0, imageWidth, imageHeight); + } + + BufferedImageGraphics(BufferedImageGraphics copyFrom) + { + image = copyFrom.image; + surface = copyFrom.surface; + cairo_t = surface.newCairoContext(); + imageWidth = copyFrom.imageWidth; + imageHeight = copyFrom.imageHeight; + + hasFastCM = copyFrom.hasFastCM; + hasAlpha = copyFrom.hasAlpha; + + copy( copyFrom, cairo_t ); + } + + /** + * Update a rectangle of the bufferedImage. This can be improved upon a lot. + */ + private void updateBufferedImage(int x, int y, int width, int height) + { + Rectangle bounds = new Rectangle(x, y, width, height); + bounds = getTransformedBounds(bounds, transform).getBounds(); + x = bounds.x; + y = bounds.y; + width = bounds.width; + height = bounds.height; + + int[] pixels = surface.getData(); + + if( x > imageWidth || y > imageHeight ) + return; + + // Deal with negative width/height. + if (height < 0) + { + y += height; + height = -height; + } + if (width < 0) + { + x += width; + width = -width; + } + + // Clip edges. + if( x < 0 ) + x = 0; + if( y < 0 ) + y = 0; + + if( x + width > imageWidth ) + width = imageWidth - x; + if( y + height > imageHeight ) + height = imageHeight - y; + + if(!hasFastCM) + { + image.setRGB(x, y, width, height, pixels, + x + y * imageWidth, imageWidth); + // The setRGB method assumes (or should assume) that pixels are NOT + // alpha-premultiplied, but Cairo stores data with premultiplication + // (thus the pixels returned in getPixels are premultiplied). + // This is ignored for consistency, however, since in + // CairoGrahpics2D.drawImage we also use non-premultiplied data + + } + else + { + int[] db = ((DataBufferInt)image.getRaster().getDataBuffer()). + getData(); + + // This should not fail, as we check the image sample model when we + // set the hasFastCM flag + SinglePixelPackedSampleModel sm = (SinglePixelPackedSampleModel)image.getSampleModel() ; + + int minX = image.getRaster().getSampleModelTranslateX(); + int minY = image.getRaster().getSampleModelTranslateY(); + + if (sm.getScanlineStride() == imageWidth && minX == 0) + { + System.arraycopy(pixels, y * imageWidth, + db, (y - minY) * imageWidth, + height * imageWidth); + } + else + { + int scanline = sm.getScanlineStride(); + for (int i = y; i < (height + y); i++) + System.arraycopy(pixels, i * imageWidth + x, db, + (i - minY) * scanline + x - minX, width); + + } + } + } + + /** + * Abstract methods. + */ + public Graphics create() + { + return new BufferedImageGraphics(this); + } + + public GraphicsConfiguration getDeviceConfiguration() + { + return null; + } + + protected Rectangle2D getRealBounds() + { + return new Rectangle2D.Double(0.0, 0.0, imageWidth, imageHeight); + } + + public void copyAreaImpl(int x, int y, int width, int height, int dx, int dy) + { + surface.copyAreaNative(x, y, width, height, dx, dy, surface.width); + updateBufferedImage(x + dx, y + dy, width, height); + } + + /** + * Overloaded methods that do actual drawing need to enter the gdk threads + * and also do certain things before and after. + */ + public void draw(Shape s) + { + // Find total bounds of shape + Rectangle r = findStrokedBounds(s); + if (shiftDrawCalls) + { + r.width++; + r.height++; + } + + // Do the drawing + if (comp == null || comp instanceof AlphaComposite) + { + super.draw(s); + updateBufferedImage(r.x, r.y, r.width, r.height); + } + else + { + createBuffer(); + + Graphics2D g2d = (Graphics2D)buffer.getGraphics(); + g2d.setStroke(this.getStroke()); + g2d.setColor(this.getColor()); + g2d.setTransform(transform); + g2d.draw(s); + + drawComposite(r.getBounds2D(), null); + } + } + + public void fill(Shape s) + { + if (comp == null || comp instanceof AlphaComposite) + { + super.fill(s); + Rectangle r = s.getBounds(); + updateBufferedImage(r.x, r.y, r.width, r.height); + } + else + { + createBuffer(); + + Graphics2D g2d = (Graphics2D)buffer.getGraphics(); + g2d.setPaint(this.getPaint()); + g2d.setColor(this.getColor()); + g2d.setTransform(transform); + g2d.fill(s); + + drawComposite(s.getBounds2D(), null); + } + } + + public void drawRenderedImage(RenderedImage image, AffineTransform xform) + { + if (comp == null || comp instanceof AlphaComposite) + { + super.drawRenderedImage(image, xform); + updateBufferedImage(0, 0, imageWidth, imageHeight); + } + else + { + createBuffer(); + + Graphics2D g2d = (Graphics2D)buffer.getGraphics(); + g2d.setRenderingHints(this.getRenderingHints()); + g2d.setTransform(transform); + g2d.drawRenderedImage(image, xform); + + drawComposite(buffer.getRaster().getBounds(), null); + } + + } + + protected boolean drawImage(Image img, AffineTransform xform, + Color bgcolor, ImageObserver obs) + { + if (comp == null || comp instanceof AlphaComposite) + { + boolean rv = super.drawImage(img, xform, bgcolor, obs); + updateBufferedImage(0, 0, imageWidth, imageHeight); + return rv; + } + else + { + // Get buffered image of source + if( !(img instanceof BufferedImage) ) + { + ImageProducer source = img.getSource(); + if (source == null) + return false; + img = Toolkit.getDefaultToolkit().createImage(source); + } + BufferedImage bImg = (BufferedImage) img; + + // Find translated bounds + Rectangle2D bounds = new Rectangle(bImg.getMinX(), bImg.getMinY(), + bImg.getWidth(), bImg.getHeight()); + if (xform != null) + bounds = getTransformedBounds(bounds, xform); + + // Create buffer and draw image + createBuffer(); + + Graphics2D g2d = (Graphics2D)buffer.getGraphics(); + g2d.setRenderingHints(this.getRenderingHints()); + g2d.drawImage(img, xform, obs); + + // Perform compositing + return drawComposite(bounds, obs); + } + } + + public void drawGlyphVector(GlyphVector gv, float x, float y) + { + // Find absolute bounds, in user-space, of this glyph vector + Rectangle2D bounds = gv.getLogicalBounds(); + bounds = new Rectangle2D.Double(x + bounds.getX(), y + bounds.getY(), + bounds.getWidth(), bounds.getHeight()); + + // Perform draw operation + if (comp == null || comp instanceof AlphaComposite) + { + super.drawGlyphVector(gv, x, y); + + // this returns an integer-based Rectangle (rather than a + // Rectangle2D), which takes care of any necessary rounding for us. + bounds = bounds.getBounds(); + + updateBufferedImage((int)bounds.getX(), (int)bounds.getY(), + (int)bounds.getWidth(), (int)bounds.getHeight()); + } + else + { + createBuffer(); + + Graphics2D g2d = (Graphics2D)buffer.getGraphics(); + g2d.setPaint(this.getPaint()); + g2d.setStroke(this.getStroke()); + g2d.setTransform(transform); + g2d.drawGlyphVector(gv, x, y); + + drawComposite(bounds, null); + } + } + + /** + * Perform composite drawing from the buffer onto the main image. + * + * The image to be composited should already be drawn into the buffer, in the + * proper place, after all necessary transforms have been applied. + * + * @param bounds The bounds to draw, in user-space. + * @param observer The image observer, if any (may be null). + * @return True on success, false on failure. + */ + private boolean drawComposite(Rectangle2D bounds, ImageObserver observer) + { + // Find bounds in device space + bounds = getTransformedBounds(bounds, transform); + + // Clip bounds by the stored clip, and by the internal buffer + Rectangle2D devClip = this.getClipInDevSpace(); + Rectangle2D.intersect(bounds, devClip, bounds); + devClip = new Rectangle(buffer.getMinX(), buffer.getMinY(), + buffer.getWidth(), buffer.getHeight()); + Rectangle2D.intersect(bounds, devClip, bounds); + + // Round bounds as needed, but be careful in our rounding + // (otherwise it may leave unpainted stripes) + double x = bounds.getX(); + double y = bounds.getY(); + double maxX = x + bounds.getWidth(); + double maxY = y + bounds.getHeight(); + x = Math.round(x); + y = Math.round(y); + bounds.setRect(x, y, Math.round(maxX - x), Math.round(maxY - y)); + + // Find subimage of internal buffer for updating + BufferedImage buffer2 = buffer; + if (!bounds.equals(buffer2.getRaster().getBounds())) + buffer2 = buffer2.getSubimage((int)bounds.getX(), (int)bounds.getY(), + (int)bounds.getWidth(), + (int)bounds.getHeight()); + + // Find subimage of main image for updating + BufferedImage current = image; + current = current.getSubimage((int)bounds.getX(), (int)bounds.getY(), + (int)bounds.getWidth(), + (int)bounds.getHeight()); + + // Perform actual composite operation + compCtx.compose(buffer2.getRaster(), current.getRaster(), + current.getRaster()); + + // Set cairo's composite to direct SRC, since we've already done our own + // compositing + Composite oldcomp = comp; + setComposite(AlphaComposite.Src); + + // This MUST call directly into the "action" method in CairoGraphics2D, + // not one of the wrappers, to ensure that the composite isn't processed + // more than once! + boolean rv = super.drawImage(current, + AffineTransform.getTranslateInstance(bounds.getX(), + bounds.getY()), + null, null); + setComposite(oldcomp); + updateColor(); + return rv; + } + + private void createBuffer() + { + if (buffer == null) + { + buffer = new BufferedImage(image.getWidth(), image.getHeight(), + BufferedImage.TYPE_INT_ARGB); + } + else + { + Graphics2D g2d = ((Graphics2D)buffer.getGraphics()); + + g2d.setBackground(new Color(0,0,0,0)); + g2d.clearRect(0, 0, buffer.getWidth(), buffer.getHeight()); + } + } + + protected ColorModel getNativeCM() + { + return image.getColorModel(); + } + + protected ColorModel getBufferCM() + { + return ColorModel.getRGBdefault(); + } +} |