| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/ui/gtk/nine_box.h" |
| |
| #include "base/basictypes.h" |
| #include "base/i18n/rtl.h" |
| #include "base/logging.h" |
| #include "ui/base/resource/resource_bundle.h" |
| #include "ui/gfx/gtk_util.h" |
| #include "ui/gfx/image/cairo_cached_surface.h" |
| #include "ui/gfx/image/image.h" |
| #include "ui/gfx/point.h" |
| |
| namespace { |
| |
| // Draw pixbuf |src| into |dst| at position (x, y). |
| void DrawImage(cairo_t* cr, GtkWidget* widget, gfx::Image* src, |
| int x, int y, double alpha) { |
| if (!src) |
| return; |
| |
| src->ToCairo()->SetSource(cr, widget, x, y); |
| cairo_paint_with_alpha(cr, alpha); |
| } |
| |
| // Tile pixbuf |src| across |cr| at |x|, |y| for |width| and |height|. |
| void TileImage(cairo_t* cr, GtkWidget* widget, gfx::Image* src, |
| int x, int y, int width, int height, double alpha) { |
| if (!src) |
| return; |
| |
| if (alpha == 1.0) { |
| src->ToCairo()->SetSource(cr, widget, x, y); |
| cairo_pattern_set_extend(cairo_get_source(cr), CAIRO_EXTEND_REPEAT); |
| cairo_rectangle(cr, x, y, width, height); |
| cairo_fill(cr); |
| } else { |
| // Since there is no easy way to apply a mask to a fill operation, we create |
| // a secondary surface and tile into that, then paint it with |alpha|. |
| cairo_surface_t* target = cairo_get_target(cr); |
| cairo_surface_t* surface = cairo_surface_create_similar( |
| target, CAIRO_CONTENT_COLOR_ALPHA, width, height); |
| cairo_t* tiled = cairo_create(surface); |
| src->ToCairo()->SetSource(tiled, widget, 0, 0); |
| cairo_pattern_set_extend(cairo_get_source(tiled), CAIRO_EXTEND_REPEAT); |
| cairo_rectangle(tiled, 0, 0, width, height); |
| cairo_fill(tiled); |
| |
| cairo_set_source_surface(cr, surface, x, y); |
| cairo_paint_with_alpha(cr, alpha); |
| |
| cairo_destroy(tiled); |
| cairo_surface_destroy(surface); |
| } |
| } |
| |
| } // namespace |
| |
| NineBox::NineBox(int top_left, int top, int top_right, int left, int center, |
| int right, int bottom_left, int bottom, int bottom_right) |
| : unref_images_on_destroy_(false) { |
| ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance(); |
| |
| images_[0] = top_left ? &rb.GetNativeImageNamed(top_left) : NULL; |
| images_[1] = top ? &rb.GetNativeImageNamed(top) : NULL; |
| images_[2] = top_right ? &rb.GetNativeImageNamed(top_right) : NULL; |
| images_[3] = left ? &rb.GetNativeImageNamed(left) : NULL; |
| images_[4] = center ? &rb.GetNativeImageNamed(center) : NULL; |
| images_[5] = right ? &rb.GetNativeImageNamed(right) : NULL; |
| images_[6] = bottom_left ? &rb.GetNativeImageNamed(bottom_left) : NULL; |
| images_[7] = bottom ? &rb.GetNativeImageNamed(bottom) : NULL; |
| images_[8] = bottom_right ? &rb.GetNativeImageNamed(bottom_right) : NULL; |
| } |
| |
| NineBox::NineBox(int image, int top_margin, int bottom_margin, int left_margin, |
| int right_margin) |
| : unref_images_on_destroy_(true) { |
| ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance(); |
| GdkPixbuf* pixbuf = rb.GetNativeImageNamed(image).ToGdkPixbuf(); |
| int width = gdk_pixbuf_get_width(pixbuf); |
| int height = gdk_pixbuf_get_height(pixbuf); |
| int inset_width = left_margin + right_margin; |
| int inset_height = top_margin + bottom_margin; |
| |
| images_[0] = new gfx::Image(gdk_pixbuf_new_subpixbuf( |
| pixbuf, 0, 0, left_margin, top_margin)); |
| images_[1] = new gfx::Image(gdk_pixbuf_new_subpixbuf( |
| pixbuf, left_margin, 0, width - inset_width, top_margin)); |
| images_[2] = new gfx::Image(gdk_pixbuf_new_subpixbuf( |
| pixbuf, width - right_margin, 0, right_margin, top_margin)); |
| images_[3] = new gfx::Image(gdk_pixbuf_new_subpixbuf( |
| pixbuf, 0, top_margin, left_margin, height - inset_height)); |
| images_[4] = new gfx::Image(gdk_pixbuf_new_subpixbuf( |
| pixbuf, left_margin, top_margin, width - inset_width, |
| height - inset_height)); |
| images_[5] = new gfx::Image(gdk_pixbuf_new_subpixbuf( |
| pixbuf, width - right_margin, top_margin, right_margin, |
| height - inset_height)); |
| images_[6] = new gfx::Image(gdk_pixbuf_new_subpixbuf( |
| pixbuf, 0, height - bottom_margin, left_margin, bottom_margin)); |
| images_[7] = new gfx::Image(gdk_pixbuf_new_subpixbuf( |
| pixbuf, left_margin, height - bottom_margin, |
| width - inset_width, bottom_margin)); |
| images_[8] = new gfx::Image(gdk_pixbuf_new_subpixbuf( |
| pixbuf, width - right_margin, height - bottom_margin, |
| right_margin, bottom_margin)); |
| } |
| |
| NineBox::~NineBox() { |
| if (unref_images_on_destroy_) { |
| for (int i = 0; i < 9; i++) { |
| delete images_[i]; |
| } |
| } |
| } |
| |
| void NineBox::RenderToWidget(GtkWidget* dst) const { |
| RenderToWidgetWithOpacity(dst, 1.0); |
| } |
| |
| void NineBox::RenderToWidgetWithOpacity(GtkWidget* dst, double opacity) const { |
| GtkAllocation allocation; |
| gtk_widget_get_allocation(dst, &allocation); |
| int w = allocation.width; |
| int h = allocation.height; |
| |
| // In case the corners and edges don't all have the same width/height, we draw |
| // the center first, and extend it out in all directions to the edges of the |
| // images with the smallest widths/heights. This way there will be no |
| // unpainted areas, though some corners or edges might overlap the center. |
| int i0w = images_[0] ? images_[0]->Width() : 0; |
| int i2w = images_[2] ? images_[2]->Width() : 0; |
| int i3w = images_[3] ? images_[3]->Width() : 0; |
| int i5w = images_[5] ? images_[5]->Width() : 0; |
| int i6w = images_[6] ? images_[6]->Width() : 0; |
| int i8w = images_[8] ? images_[8]->Width() : 0; |
| int i4x = std::min(std::min(i0w, i3w), i6w); |
| int i4w = w - i4x - std::min(std::min(i2w, i5w), i8w); |
| int i0h = images_[0] ? images_[0]->Height() : 0; |
| int i1h = images_[1] ? images_[1]->Height() : 0; |
| int i2h = images_[2] ? images_[2]->Height() : 0; |
| int i6h = images_[6] ? images_[6]->Height() : 0; |
| int i7h = images_[7] ? images_[7]->Height() : 0; |
| int i8h = images_[8] ? images_[8]->Height() : 0; |
| int i4y = std::min(std::min(i0h, i1h), i2h); |
| int i4h = h - i4y - std::min(std::min(i6h, i7h), i8h); |
| |
| cairo_t* cr = gdk_cairo_create(GDK_DRAWABLE(gtk_widget_get_window(dst))); |
| // For widgets that have their own window, the allocation (x,y) coordinates |
| // are GdkWindow relative. For other widgets, the coordinates are relative |
| // to their container. |
| if (!gtk_widget_get_has_window(dst)) { |
| // Transform our cairo from window to widget coordinates. |
| cairo_translate(cr, allocation.x, allocation.y); |
| } |
| |
| if (base::i18n::IsRTL()) { |
| cairo_translate(cr, w, 0.0f); |
| cairo_scale(cr, -1.0f, 1.0f); |
| } |
| |
| // Top row, center image is horizontally tiled. |
| DrawImage(cr, dst, images_[0], 0, 0, opacity); |
| TileImage(cr, dst, images_[1], i0w, 0, w - i0w - i2w, i1h, opacity); |
| DrawImage(cr, dst, images_[2], w - i2w, 0, opacity); |
| |
| // Center row, all images are vertically tiled, center is horizontally tiled. |
| TileImage(cr, dst, images_[3], 0, i0h, i3w, h - i0h - i6h, opacity); |
| TileImage(cr, dst, images_[4], i4x, i4y, i4w, i4h, opacity); |
| TileImage(cr, dst, images_[5], w - i5w, i2h, i5w, h - i2h - i8h, opacity); |
| |
| // Bottom row, center image is horizontally tiled. |
| DrawImage(cr, dst, images_[6], 0, h - i6h, opacity); |
| TileImage(cr, dst, images_[7], i6w, h - i7h, w - i6w - i8w, i7h, opacity); |
| DrawImage(cr, dst, images_[8], w - i8w, h - i8h, opacity); |
| |
| cairo_destroy(cr); |
| } |
| |
| void NineBox::ContourWidget(GtkWidget* widget) const { |
| GtkAllocation allocation; |
| gtk_widget_get_allocation(widget, &allocation); |
| int width = allocation.width; |
| int height = allocation.height; |
| int x1 = gdk_pixbuf_get_width(images_[0]->ToGdkPixbuf()); |
| int x2 = width - gdk_pixbuf_get_width(images_[2]->ToGdkPixbuf()); |
| |
| // TODO(erg): Far in the future, when we're doing the real gtk3 porting, this |
| // all needs to be switchted to pure cairo operations. |
| |
| // Paint the left and right sides. |
| GdkBitmap* mask = gdk_pixmap_new(NULL, width, height, 1); |
| gdk_pixbuf_render_threshold_alpha(images_[0]->ToGdkPixbuf(), mask, |
| 0, 0, |
| 0, 0, -1, -1, |
| 1); |
| gdk_pixbuf_render_threshold_alpha(images_[2]->ToGdkPixbuf(), mask, |
| 0, 0, |
| x2, 0, -1, -1, |
| 1); |
| |
| // Assume no transparency in the middle rectangle. |
| cairo_t* cr = gdk_cairo_create(mask); |
| cairo_rectangle(cr, x1, 0, x2 - x1, height); |
| cairo_fill(cr); |
| cairo_destroy(cr); |
| |
| // Mask the widget's window's shape. |
| if (!base::i18n::IsRTL()) { |
| gtk_widget_shape_combine_mask(widget, mask, 0, 0); |
| } else { |
| GdkBitmap* flipped_mask = gdk_pixmap_new(NULL, width, height, 1); |
| cairo_t* flipped_cr = gdk_cairo_create(flipped_mask); |
| |
| // Clear the target bitmap. |
| cairo_set_operator(flipped_cr, CAIRO_OPERATOR_CLEAR); |
| cairo_paint(flipped_cr); |
| |
| // Apply flipping transformation. |
| cairo_translate(flipped_cr, width, 0.0f); |
| cairo_scale(flipped_cr, -1.0f, 1.0f); |
| |
| // Paint the source bitmap onto the target. |
| cairo_set_operator(flipped_cr, CAIRO_OPERATOR_SOURCE); |
| gdk_cairo_set_source_pixmap(flipped_cr, mask, 0, 0); |
| cairo_paint(flipped_cr); |
| cairo_destroy(flipped_cr); |
| |
| // Mask the widget. |
| gtk_widget_shape_combine_mask(widget, flipped_mask, 0, 0); |
| g_object_unref(flipped_mask); |
| } |
| |
| g_object_unref(mask); |
| } |