1 /* 2 * 2010 Igalia S.L 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with this library; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19 #include "config.h" 20 #include "DragImage.h" 21 22 #include "CachedImage.h" 23 #include "Image.h" 24 #include "RefPtrCairo.h" 25 #include <cairo.h> 26 27 namespace WebCore { 28 29 IntSize dragImageSize(DragImageRef image) 30 { 31 if (image) 32 return IntSize(cairo_image_surface_get_width(image), cairo_image_surface_get_height(image)); 33 34 return IntSize(0, 0); 35 } 36 37 void deleteDragImage(DragImageRef image) 38 { 39 if (image) 40 cairo_surface_destroy(image); 41 } 42 43 DragImageRef scaleDragImage(DragImageRef image, FloatSize scale) 44 { 45 if (!image) 46 return 0; 47 48 int newWidth = scale.width() * cairo_image_surface_get_width(image); 49 int newHeight = scale.height() * cairo_image_surface_get_height(image); 50 cairo_surface_t* scaledSurface = cairo_surface_create_similar(image, CAIRO_CONTENT_COLOR_ALPHA, newWidth, newHeight); 51 52 RefPtr<cairo_t> context = adoptRef(cairo_create(scaledSurface)); 53 cairo_scale(context.get(), scale.width(), scale.height()); 54 cairo_pattern_set_extend(cairo_get_source(context.get()), CAIRO_EXTEND_PAD); 55 cairo_pattern_set_filter(cairo_get_source(context.get()), CAIRO_FILTER_BEST); 56 cairo_set_operator(context.get(), CAIRO_OPERATOR_SOURCE); 57 cairo_set_source_surface(context.get(), image, 0, 0); 58 cairo_paint(context.get()); 59 60 deleteDragImage(image); 61 return scaledSurface; 62 } 63 64 DragImageRef dissolveDragImageToFraction(DragImageRef image, float fraction) 65 { 66 if (!image) 67 return 0; 68 69 RefPtr<cairo_t> context = adoptRef(cairo_create(image)); 70 cairo_set_operator(context.get(), CAIRO_OPERATOR_DEST_IN); 71 cairo_set_source_rgba(context.get(), 0, 0, 0, fraction); 72 cairo_paint(context.get()); 73 return image; 74 } 75 76 DragImageRef createDragImageFromImage(Image* image) 77 { 78 return cairo_surface_reference(image->nativeImageForCurrentFrame()); 79 } 80 81 DragImageRef createDragImageIconForCachedImage(CachedImage*) 82 { 83 return 0; 84 } 85 86 } 87
