Index: ui/gfx/nine_image_painter.cc |
diff --git a/ui/gfx/nine_image_painter.cc b/ui/gfx/nine_image_painter.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d54dac95738d83091ce71070a7ec55b206b8fb05 |
--- /dev/null |
+++ b/ui/gfx/nine_image_painter.cc |
@@ -0,0 +1,104 @@ |
+// Copyright 2014 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 "ui/gfx/nine_image_painter.h" |
+ |
+#include "ui/gfx/canvas.h" |
+#include "ui/gfx/image/image_skia_operations.h" |
+#include "ui/gfx/insets.h" |
+#include "ui/gfx/rect.h" |
+#include "ui/gfx/scoped_canvas.h" |
+ |
+namespace gfx { |
+ |
+NineImagePainter::NineImagePainter(const std::vector<ImageSkia>& images) { |
+ DCHECK_EQ(arraysize(images_), images.size()); |
+ for (size_t i = 0; i < arraysize(images_); ++i) |
+ images_[i] = images[i]; |
+} |
+ |
+NineImagePainter::NineImagePainter(const ImageSkia& image, |
+ const Insets& insets) { |
+ DCHECK_GE(image.width(), insets.width()); |
+ DCHECK_GE(image.height(), insets.height()); |
+ |
+ // Extract subsets of the original image to match the |images_| format. |
+ const int x[] = |
+ { 0, insets.left(), image.width() - insets.right(), image.width() }; |
+ const int y[] = |
+ { 0, insets.top(), image.height() - insets.bottom(), image.height() }; |
+ |
+ for (size_t j = 0; j < 3; ++j) { |
+ for (size_t i = 0; i < 3; ++i) { |
+ images_[i + j * 3] = ImageSkiaOperations::ExtractSubset(image, |
+ Rect(x[i], y[j], x[i + 1] - x[i], y[j + 1] - y[j])); |
+ } |
+ } |
+} |
+ |
+NineImagePainter::~NineImagePainter() { |
+} |
+ |
+bool NineImagePainter::IsEmpty() const { |
+ return images_[0].isNull(); |
+} |
+ |
+Size NineImagePainter::GetMinimumSize() const { |
+ return IsEmpty() ? Size() : Size( |
+ images_[0].width() + images_[1].width() + images_[2].width(), |
+ images_[0].height() + images_[3].height() + images_[6].height()); |
+} |
+ |
+void NineImagePainter::Paint(Canvas* canvas, const Rect& bounds) { |
+ if (IsEmpty()) |
+ return; |
+ |
+ ScopedCanvas scoped_canvas(canvas); |
+ canvas->Translate(bounds.OffsetFromOrigin()); |
+ |
+ // 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 w = bounds.width(); |
+ int i0w = images_[0].width(); |
+ int i2w = images_[2].width(); |
+ int i3w = images_[3].width(); |
+ int i5w = images_[5].width(); |
+ int i6w = images_[6].width(); |
+ int i8w = images_[8].width(); |
+ int i4x = std::min(std::min(i0w, i3w), i6w); |
+ int i4w = w - i4x - std::min(std::min(i2w, i5w), i8w); |
+ int h = bounds.height(); |
+ int i0h = images_[0].height(); |
+ int i1h = images_[1].height(); |
+ int i2h = images_[2].height(); |
+ int i6h = images_[6].height(); |
+ int i7h = images_[7].height(); |
+ int i8h = images_[8].height(); |
+ int i4y = std::min(std::min(i0h, i1h), i2h); |
+ int i4h = h - i4y - std::min(std::min(i6h, i7h), i8h); |
+ if (!images_[4].isNull()) |
+ Fill(canvas, images_[4], i4x, i4y, i4w, i4h); |
+ canvas->DrawImageInt(images_[0], 0, 0); |
+ Fill(canvas, images_[1], i0w, 0, w - i0w - i2w, i1h); |
+ canvas->DrawImageInt(images_[2], w - i2w, 0); |
+ Fill(canvas, images_[3], 0, i0h, i3w, h - i0h - i6h); |
+ Fill(canvas, images_[5], w - i5w, i2h, i5w, h - i2h - i8h); |
+ canvas->DrawImageInt(images_[6], 0, h - i6h); |
+ Fill(canvas, images_[7], i6w, h - i7h, w - i6w - i8w, i7h); |
+ canvas->DrawImageInt(images_[8], w - i8w, h - i8h); |
+} |
+ |
+// static |
+void NineImagePainter::Fill(Canvas* c, |
+ const ImageSkia& i, |
+ int x, |
+ int y, |
+ int w, |
+ int h) { |
+ c->DrawImageInt(i, 0, 0, i.width(), i.height(), x, y, w, h, false); |
+} |
+ |
+} // namespace gfx |