cc: Nine patch layer.

cc/nine_patch_layer_impl_unittest.cc

+// Copyright 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 "config.h"
+
+#include "cc/nine_patch_layer_impl.h"
+
+#include "cc/append_quads_data.h"
+#include "cc/test/geometry_test_utils.h"
+#include "cc/test/layer_test_common.h"
+#include "cc/test/mock_quad_culler.h"
+#include "cc/texture_draw_quad.h"
+#include "ui/gfx/rect_conversions.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include <public/WebTransformationMatrix.h>
+
+using namespace cc;
+
+namespace {
+
+TEST(NinePatchLayerImplTest, verifyDrawQuads)
+{
+    // Input is a 100x100 bitmap with a 20x20 aperture at x=20, y=20.
+    // The bounds of the layer are set to 400x400, so the draw quads
+    // generated should leave the border width (20) intact.
+    MockQuadCuller quadCuller;
+    gfx::Size bitmapSize(100, 100);
+    gfx::Size layerSize(400, 400);
+    gfx::Rect visibleContentRect(gfx::Point(), layerSize);
+    gfx::Rect apertureRect(20, 20, 20, 20);

[jamesr, 2012/11/05 23:10:53]

would you mind making these values not equal to each other so it breaks if
somebody transposes (for instance) a top/bottom or left/right pair somewhere in
the math?

[aelias_OOO_until_Jul13, 2012/11/06 01:15:00]

Done.

+    gfx::Rect scaledApertureNonUniform(20, 20, 320, 320);
+
+    scoped_ptr<NinePatchLayerImpl> layer = NinePatchLayerImpl::create(1);
+    layer->setVisibleContentRect(visibleContentRect);
+    layer->setBounds(layerSize);
+    layer->setContentBounds(layerSize);
+    layer->createRenderSurface();
+    layer->setRenderTarget(layer.get());
+    layer->setLayout(bitmapSize, apertureRect);
+    layer->setResourceId(1);
+
+    // This scale should not affect the generated quad geometry, but only
+    // the shared draw transform.
+    WebKit::WebTransformationMatrix transform;
+    transform.scale(10);
+    layer->setDrawTransform(transform);
+
+    AppendQuadsData data;
+    layer->appendQuads(quadCuller, data);
+
+    // Verify quad rects
+    const QuadList& quads = quadCuller.quadList();
+    EXPECT_EQ(quads.size(), 8);
+    Region remaining(visibleContentRect);
+    for (size_t i = 0; i < quads.size(); ++i) {
+        DrawQuad* quad = quads[i];
+        gfx::Rect quadRect = quad->quadRect();
+
+        EXPECT_TRUE(visibleContentRect.Contains(quadRect)) << i;
+        EXPECT_TRUE(remaining.Contains(quadRect)) << i;
+        EXPECT_EQ(quad->sharedQuadState()->quadTransform, transform) << i;
+        remaining.Subtract(Region(quadRect));
+    }
+    EXPECT_EQ(remaining.rects().size(), 1);
+    EXPECT_RECT_EQ(remaining.bounds(), scaledApertureNonUniform);
+
+    // Verify UV rects
+    gfx::Rect bitmapRect(gfx::Point(), bitmapSize);
+    Region texRemaining(bitmapRect);
+    for (size_t i = 0; i < quads.size(); ++i) {
+        DrawQuad* quad = quads[i];
+        ASSERT_EQ(quad->material(), DrawQuad::TextureContent);
+        TextureDrawQuad* texQuad = static_cast<TextureDrawQuad*>(quad);
+        gfx::RectF texRect = texQuad->uvRect();
+        texRect.Scale(bitmapSize.width(), bitmapSize.height());
+        texRemaining.Subtract(Region(gfx::ToEnclosingRect(texRect)));
+    }
+    EXPECT_EQ(texRemaining.rects().size(), 1);
+    EXPECT_RECT_EQ(texRemaining.bounds(), apertureRect);
+}
+
+}