Index: webkit/tools/webcore_unit_tests/TransparencyWin_unittest.cpp |
=================================================================== |
--- webkit/tools/webcore_unit_tests/TransparencyWin_unittest.cpp (revision 0) |
+++ webkit/tools/webcore_unit_tests/TransparencyWin_unittest.cpp (revision 0) |
@@ -0,0 +1,679 @@ |
+/* |
+ * Copyright (C) 2009 Google Inc. All rights reserved. |
+ * |
+ * Redistribution and use in source and binary forms, with or without |
+ * modification, are permitted provided that the following conditions are |
+ * met: |
+ * |
+ * * Redistributions of source code must retain the above copyright |
+ * notice, this list of conditions and the following disclaimer. |
+ * * Redistributions in binary form must reproduce the above |
+ * copyright notice, this list of conditions and the following disclaimer |
+ * in the documentation and/or other materials provided with the |
+ * distribution. |
+ * * Neither the name of Google Inc. nor the names of its |
+ * contributors may be used to endorse or promote products derived from |
+ * this software without specific prior written permission. |
+ * |
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
+ */ |
+ |
+#include "config.h" |
+#include <windows.h> |
+ |
+#include "ImageBuffer.h" |
+#include "TransformationMatrix.h" |
+#include "TransparencyHelperWin.h" |
+ |
+#include "testing/gtest/include/gtest/gtest.h" |
+ |
+namespace WebCore { |
+ |
+static FloatRect RECTToFloatRect(const RECT* rect) |
+{ |
+ return FloatRect(static_cast<float>(rect->left), |
+ static_cast<float>(rect->top), |
+ static_cast<float>(rect->right - rect->left), |
+ static_cast<float>(rect->bottom - rect->top)); |
+} |
+ |
+static void drawNativeRect(GraphicsContext* context, |
+ int x, int y, int w, int h) |
+{ |
+ skia::PlatformCanvas* canvas = context->platformContext()->canvas(); |
+ HDC dc = canvas->beginPlatformPaint(); |
+ |
+ RECT inner_rc; |
+ inner_rc.left = x; |
+ inner_rc.top = y; |
+ inner_rc.right = x + w; |
+ inner_rc.bottom = y + h; |
+ FillRect(dc, &inner_rc, |
+ reinterpret_cast<HBRUSH>(GetStockObject(BLACK_BRUSH))); |
+ |
+ canvas->endPlatformPaint(); |
+} |
+ |
+static Color getPixelAt(GraphicsContext* context, int x, int y) |
+{ |
+ const SkBitmap& bitmap = context->platformContext()->canvas()-> |
+ getTopPlatformDevice().accessBitmap(false); |
+ return Color(*reinterpret_cast<const RGBA32*>(bitmap.getAddr32(x, y))); |
+} |
+ |
+// Resets the top layer's alpha channel to 0 for each pixel. This simulates |
+// Windows messing it up. |
+static void clearTopLayerAlphaChannel(GraphicsContext* context) |
+{ |
+ SkBitmap& bitmap = const_cast<SkBitmap&>(context->platformContext()-> |
+ canvas()->getTopPlatformDevice().accessBitmap(false)); |
+ for (int y = 0; y < bitmap.height(); y++) { |
+ uint32_t* row = bitmap.getAddr32(0, y); |
+ for (int x = 0; x < bitmap.width(); x++) |
+ row[x] &= 0x00FFFFFF; |
+ } |
+} |
+ |
+// Clears the alpha channel on the specified pixel. |
+static void clearTopLayerAlphaPixel(GraphicsContext* context, int x, int y) |
+{ |
+ SkBitmap& bitmap = const_cast<SkBitmap&>(context->platformContext()-> |
+ canvas()->getTopPlatformDevice().accessBitmap(false)); |
+ *bitmap.getAddr32(x, y) &= 0x00FFFFFF; |
+} |
+ |
+static std::ostream& operator<<(std::ostream& out, const Color& c) |
+{ |
+ std::ios_base::fmtflags oldFlags = out.flags(std::ios_base::hex | |
+ std::ios_base::showbase); |
+ out << c.rgb(); |
+ out.flags(oldFlags); |
+ return out; |
+} |
+ |
+TEST(TransparencyHelperWin, NoLayer) |
+{ |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ |
+ // KeepTransform |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::NoLayer, |
+ TransparencyHelperWin::KeepTransform, |
+ IntRect(1, 1, 14, 12)); |
+ |
+ EXPECT_TRUE(src->context() == helper.context()); |
+ EXPECT_TRUE(IntSize(14, 12) == helper.m_layerSize); |
+ EXPECT_TRUE(IntRect(1, 1, 14, 12) == helper.drawRect()); |
+ } |
+ |
+ // Untransform is not allowed for NoLayer. |
+ |
+ // ScaleTransform |
+ src->context()->save(); |
+ src->context()->scale(FloatSize(2.0, 0.5)); |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::NoLayer, |
+ TransparencyHelperWin::ScaleTransform, |
+ IntRect(2, 2, 6, 6)); |
+ |
+ // The coordinate system should be based in the upper left of our box. |
+ // It should be post-transformed. |
+ EXPECT_TRUE(src->context() == helper.context()); |
+ EXPECT_TRUE(IntSize(12, 3) == helper.m_layerSize); |
+ EXPECT_TRUE(IntRect(4, 1, 12, 3) == helper.drawRect()); |
+ } |
+ src->context()->restore(); |
+} |
+ |
+TEST(TransparencyHelperWin, WhiteLayer) |
+{ |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ |
+ // KeepTransform |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::WhiteLayer, |
+ TransparencyHelperWin::KeepTransform, |
+ IntRect(1, 1, 14, 12)); |
+ |
+ EXPECT_TRUE(src->context() != helper.context()); |
+ EXPECT_TRUE(IntSize(14, 12) == helper.m_layerSize); |
+ EXPECT_TRUE(IntRect(1, 1, 14, 12) == helper.drawRect()); |
+ } |
+ |
+ // Untransform |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::WhiteLayer, |
+ TransparencyHelperWin::Untransform, |
+ IntRect(1, 1, 14, 12)); |
+ |
+ EXPECT_TRUE(src->context() != helper.context()); |
+ EXPECT_TRUE(IntSize(14, 12) == helper.m_layerSize); |
+ EXPECT_TRUE(IntRect(0, 0, 14, 12) == helper.drawRect()); |
+ } |
+ |
+ // ScaleTransform |
+ src->context()->save(); |
+ src->context()->scale(FloatSize(2.0, 0.5)); |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::WhiteLayer, |
+ TransparencyHelperWin::ScaleTransform, |
+ IntRect(2, 2, 6, 6)); |
+ |
+ // The coordinate system should be based in the upper left of our box. |
+ // It should be post-transformed. |
+ EXPECT_TRUE(src->context() != helper.context()); |
+ EXPECT_TRUE(IntSize(12, 3) == helper.m_layerSize); |
+ EXPECT_TRUE(IntRect(0, 0, 12, 3) == helper.drawRect()); |
+ } |
+ src->context()->restore(); |
+} |
+ |
+TEST(TransparencyHelperWin, TextComposite) |
+{ |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ |
+ // KeepTransform is the only valid transform mode for TextComposite. |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::TextComposite, |
+ TransparencyHelperWin::KeepTransform, |
+ IntRect(1, 1, 14, 12)); |
+ |
+ EXPECT_TRUE(src->context() != helper.context()); |
+ EXPECT_TRUE(IntSize(14, 12) == helper.m_layerSize); |
+ EXPECT_TRUE(IntRect(1, 1, 14, 12) == helper.drawRect()); |
+ } |
+} |
+ |
+TEST(TransparencyHelperWin, OpaqueCompositeLayer) |
+{ |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ |
+ // KeepTransform |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::OpaqueCompositeLayer, |
+ TransparencyHelperWin::KeepTransform, |
+ IntRect(1, 1, 14, 12)); |
+ |
+ EXPECT_TRUE(src->context() != helper.context()); |
+ EXPECT_TRUE(IntSize(14, 12) == helper.m_layerSize); |
+ EXPECT_TRUE(IntRect(1, 1, 14, 12) == helper.drawRect()); |
+ } |
+ |
+ // KeepTransform with scroll applied. |
+ src->context()->save(); |
+ src->context()->translate(0, -1); |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::OpaqueCompositeLayer, |
+ TransparencyHelperWin::KeepTransform, |
+ IntRect(1, 1, 14, 14)); |
+ |
+ EXPECT_TRUE(src->context() != helper.context()); |
+ EXPECT_TRUE(IntSize(14, 14) == helper.m_layerSize); |
+ EXPECT_TRUE(IntRect(1, 1, 14, 14) == helper.drawRect()); |
+ } |
+ src->context()->restore(); |
+ |
+ // Untransform |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::OpaqueCompositeLayer, |
+ TransparencyHelperWin::Untransform, |
+ IntRect(1, 1, 14, 12)); |
+ |
+ EXPECT_TRUE(src->context() != helper.context()); |
+ EXPECT_TRUE(IntSize(14, 12) == helper.m_layerSize); |
+ EXPECT_TRUE(IntRect(0, 0, 14, 12) == helper.drawRect()); |
+ } |
+ |
+ // ScaleTransform |
+ src->context()->save(); |
+ src->context()->scale(FloatSize(2.0, 0.5)); |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::OpaqueCompositeLayer, |
+ TransparencyHelperWin::ScaleTransform, |
+ IntRect(2, 2, 6, 6)); |
+ |
+ // The coordinate system should be based in the upper left of our box. |
+ // It should be post-transformed. |
+ EXPECT_TRUE(src->context() != helper.context()); |
+ EXPECT_TRUE(IntSize(12, 3) == helper.m_layerSize); |
+ EXPECT_TRUE(IntRect(0, 0, 12, 3) == helper.drawRect()); |
+ } |
+ src->context()->restore(); |
+} |
+ |
+TEST(TransparencyHelperWin, WhiteLayerPixelTest) |
+{ |
+ // Make a total transparent buffer, and draw the white layer inset by 1 px. |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::WhiteLayer, |
+ TransparencyHelperWin::KeepTransform, |
+ IntRect(1, 1, 14, 14)); |
+ |
+ // Coordinates should be in the original space, not the layer. |
+ drawNativeRect(helper.context(), 3, 3, 1, 1); |
+ clearTopLayerAlphaChannel(helper.context()); |
+ } |
+ |
+ // The final image should be transparent around the edges for 1 px, white |
+ // in the middle, with (3,3) (what we drew above) being opaque black. |
+ EXPECT_EQ(Color(Color::transparent), getPixelAt(src->context(), 0, 0)); |
+ EXPECT_EQ(Color(Color::white), getPixelAt(src->context(), 2, 2)); |
+ EXPECT_EQ(Color(Color::black), getPixelAt(src->context(), 3, 3)); |
+ EXPECT_EQ(Color(Color::white), getPixelAt(src->context(), 4, 4)); |
+} |
+ |
+TEST(TransparencyHelperWin, OpaqueCompositeLayerPixel) |
+{ |
+ Color red(0xFFFF0000), darkRed(0xFFC00000); |
+ Color green(0xFF00FF00); |
+ |
+ // Make a red bottom layer, followed by a half green next layer @ 50%. |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ |
+ FloatRect fullRect(0, 0, 16, 16); |
+ src->context()->fillRect(fullRect, red); |
+ src->context()->beginTransparencyLayer(0.5); |
+ FloatRect rightHalf(8, 0, 8, 16); |
+ src->context()->fillRect(rightHalf, green); |
+ |
+ // Make a transparency layer inset by one pixel, and fill it inset by |
+ // another pixel with 50% black. |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::OpaqueCompositeLayer, |
+ TransparencyHelperWin::KeepTransform, |
+ IntRect(1, 1, 14, 14)); |
+ |
+ FloatRect inner(2, 2, 12, 12); |
+ helper.context()->fillRect(inner, Color(0x7f000000)); |
+ // These coordinates are relative to the layer, whish is inset by 1x1 |
+ // pixels from the top left. So we're actually clearing (2, 2) and |
+ // (13,13), which are the extreme corners of the black area (and which |
+ // we check below). |
+ clearTopLayerAlphaPixel(helper.context(), 1, 1); |
+ clearTopLayerAlphaPixel(helper.context(), 12, 12); |
+ } |
+ |
+ // Finish the compositing. |
+ src->context()->endTransparencyLayer(); |
+ |
+ // Check that we got the right values, it should be like the rectangle was |
+ // drawn with half opacity even though the alpha channel got messed up. |
+ EXPECT_EQ(red, getPixelAt(src->context(), 0, 0)); |
+ EXPECT_EQ(red, getPixelAt(src->context(), 1, 1)); |
+ EXPECT_EQ(darkRed, getPixelAt(src->context(), 2, 2)); |
+ |
+ // The dark result is: |
+ // (black @ 50% atop green) @ 50% atop red = 0xFF804000 |
+ // which is 0xFFA02000 (Skia computes 0xFFA11F00 due to rounding). |
+ Color darkGreenRed(0xFF813f00); |
+ EXPECT_EQ(darkGreenRed, getPixelAt(src->context(), 13, 13)); |
+ |
+ // 50% green on top of red = FF808000 (rounded to what Skia will produce). |
+ Color greenRed(0xFF817E00); |
+ EXPECT_EQ(greenRed, getPixelAt(src->context(), 14, 14)); |
+ EXPECT_EQ(greenRed, getPixelAt(src->context(), 15, 15)); |
+} |
+ |
+// Tests that translations are properly handled when using KeepTransform. |
+TEST(TransparencyHelperWin, TranslateOpaqueCompositeLayer) |
+{ |
+ // Fill with white. |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ Color white(0xFFFFFFFF); |
+ FloatRect fullRect(0, 0, 16, 16); |
+ src->context()->fillRect(fullRect, white); |
+ |
+ // Scroll down by 8 (coordinate system goes up). |
+ src->context()->save(); |
+ src->context()->translate(0, -8); |
+ |
+ Color red(0xFFFF0000); |
+ Color green(0xFF00FF00); |
+ { |
+ // Make the transparency layer after translation will be @ (0, -8) with |
+ // size 16x16. |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::OpaqueCompositeLayer, |
+ TransparencyHelperWin::KeepTransform, |
+ IntRect(0, 0, 16, 16)); |
+ |
+ // Draw a red pixel at (15, 15). This should be the at (15, 7) after |
+ // the transform. |
+ FloatRect bottomRight(15, 15, 1, 1); |
+ helper.context()->fillRect(bottomRight, green); |
+ } |
+ |
+ src->context()->restore(); |
+ |
+ // Check the pixel we wrote. |
+ EXPECT_EQ(green, getPixelAt(src->context(), 15, 7)); |
+} |
+ |
+// Same as OpaqueCompositeLayer, but the canvas has a rotation applied. This |
+// tests that the propert transform is applied to the copied layer. |
+TEST(TransparencyHelperWin, RotateOpaqueCompositeLayer) |
+{ |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ |
+ // The background is white. |
+ Color white(0xFFFFFFFF); |
+ FloatRect fullRect(0, 0, 16, 16); |
+ src->context()->fillRect(fullRect, white); |
+ |
+ // Rotate the image by 90 degrees. This matrix is the same as |
+ // cw90.rotate(90); but avoids rounding errors. Rounding errors can cause |
+ // Skia to think that !rectStaysRect() and it will fall through to path |
+ // drawing mode, which in turn gives us antialiasing. We want no |
+ // antialiasing or other rounding problems since we're testing exact pixel |
+ // values. |
+ src->context()->save(); |
+ TransformationMatrix cw90( 0, 1, 0, 0, |
+ -1, 0, 0, 0, |
+ 0, 0, 1, 0, |
+ 0, 0, 0, 1); |
+ src->context()->concatCTM(cw90); |
+ |
+ // Make a transparency layer consisting of a horizontal line of 50% black. |
+ // Since the rotation is applied, this will actually be a vertical line |
+ // down the middle of the image. |
+ src->context()->beginTransparencyLayer(0.5); |
+ FloatRect blackRect(0, -9, 16, 2); |
+ Color black(0xFF000000); |
+ src->context()->fillRect(blackRect, black); |
+ |
+ // Now draw 50% red square. |
+ { |
+ // Create a transparency helper inset one pixel in the buffer. The |
+ // coordinates are before transforming into this space, and maps to |
+ // IntRect(1, 1, 14, 14). |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::OpaqueCompositeLayer, |
+ TransparencyHelperWin::Untransform, |
+ IntRect(1, -15, 14, 14)); |
+ |
+ // Fill with red. |
+ helper.context()->fillRect(helper.drawRect(), Color(0x7f7f0000)); |
+ clearTopLayerAlphaChannel(helper.context()); |
+ } |
+ |
+ // Finish the compositing. |
+ src->context()->endTransparencyLayer(); |
+ |
+ // Top corner should be the original background. |
+ EXPECT_EQ(white, getPixelAt(src->context(), 0, 0)); |
+ |
+ // Check the stripe down the middle, first at the top... |
+ Color gray(0xFF818181); |
+ EXPECT_EQ(white, getPixelAt(src->context(), 6, 0)); |
+ EXPECT_EQ(gray, getPixelAt(src->context(), 7, 0)); |
+ EXPECT_EQ(gray, getPixelAt(src->context(), 8, 0)); |
+ EXPECT_EQ(white, getPixelAt(src->context(), 9, 0)); |
+ |
+ // ...now at the bottom. |
+ EXPECT_EQ(white, getPixelAt(src->context(), 6, 15)); |
+ EXPECT_EQ(gray, getPixelAt(src->context(), 7, 15)); |
+ EXPECT_EQ(gray, getPixelAt(src->context(), 8, 15)); |
+ EXPECT_EQ(white, getPixelAt(src->context(), 9, 15)); |
+ |
+ // Our red square should be 25% red over the top of those two. |
+ Color redwhite(0xFFdfc0c0); |
+ Color redgray(0xFFa08181); |
+ EXPECT_EQ(white, getPixelAt(src->context(), 0, 1)); |
+ EXPECT_EQ(redwhite, getPixelAt(src->context(), 1, 1)); |
+ EXPECT_EQ(redwhite, getPixelAt(src->context(), 6, 1)); |
+ EXPECT_EQ(redgray, getPixelAt(src->context(), 7, 1)); |
+ EXPECT_EQ(redgray, getPixelAt(src->context(), 8, 1)); |
+ EXPECT_EQ(redwhite, getPixelAt(src->context(), 9, 1)); |
+ EXPECT_EQ(redwhite, getPixelAt(src->context(), 14, 1)); |
+ EXPECT_EQ(white, getPixelAt(src->context(), 15, 1)); |
+ |
+ // Complete the 50% transparent layer. |
+ src->context()->restore(); |
+} |
+ |
+TEST(TransparencyHelperWin, TranslateScaleOpaqueCompositeLayer) |
+{ |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ |
+ // The background is white on top with red on bottom. |
+ Color white(0xFFFFFFFF); |
+ FloatRect topRect(0, 0, 16, 8); |
+ src->context()->fillRect(topRect, white); |
+ Color red(0xFFFF0000); |
+ FloatRect bottomRect(0, 8, 16, 8); |
+ src->context()->fillRect(bottomRect, red); |
+ |
+ src->context()->save(); |
+ |
+ // Translate left by one pixel. |
+ TransformationMatrix left; |
+ left.translate(-1, 0); |
+ |
+ // Scale by 2x. |
+ TransformationMatrix scale; |
+ scale.scale(2.0); |
+ src->context()->concatCTM(scale); |
+ |
+ // Then translate up by one pixel (which will actually be 2 due to scaling). |
+ TransformationMatrix up; |
+ up.translate(0, -1); |
+ src->context()->concatCTM(up); |
+ |
+ // Now draw 50% red square. |
+ { |
+ // Create a transparency helper inset one pixel in the buffer. The |
+ // coordinates are before transforming into this space, and maps to |
+ // IntRect(1, 1, 14, 14). |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::OpaqueCompositeLayer, |
+ TransparencyHelperWin::KeepTransform, |
+ IntRect(1, -15, 14, 14)); |
+ |
+ // Fill with red. |
+ helper.context()->fillRect(helper.drawRect(), Color(0x7f7f0000)); |
+ clearTopLayerAlphaChannel(helper.context()); |
+ } |
+} |
+ |
+// Tests scale mode with no additional copy. |
+TEST(TransparencyHelperWin, Scale) |
+{ |
+ // Create an opaque white buffer. |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ FloatRect fullBuffer(0, 0, 16, 16); |
+ src->context()->fillRect(fullBuffer, Color::white); |
+ |
+ // Scale by 2x. |
+ src->context()->save(); |
+ TransformationMatrix scale; |
+ scale.scale(2.0); |
+ src->context()->concatCTM(scale); |
+ |
+ // Start drawing a rectangle from 1->4. This should get scaled to 2->8. |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::NoLayer, |
+ TransparencyHelperWin::ScaleTransform, |
+ IntRect(1, 1, 3, 3)); |
+ |
+ // The context should now have the identity transform and the returned |
+ // rect should be scaled. |
+ EXPECT_TRUE(helper.context()->getCTM().isIdentity()); |
+ EXPECT_EQ(2, helper.drawRect().x()); |
+ EXPECT_EQ(2, helper.drawRect().y()); |
+ EXPECT_EQ(8, helper.drawRect().right()); |
+ EXPECT_EQ(8, helper.drawRect().bottom()); |
+ |
+ // Set the pixel at (2, 2) to be transparent. This should be fixed when |
+ // the helper goes out of scope. We don't want to call |
+ // clearTopLayerAlphaChannel because that will actually clear the whole |
+ // canvas (since we have no extra layer!). |
+ SkBitmap& bitmap = const_cast<SkBitmap&>(helper.context()-> |
+ platformContext()->canvas()->getTopPlatformDevice(). |
+ accessBitmap(false)); |
+ *bitmap.getAddr32(2, 2) &= 0x00FFFFFF; |
+ } |
+ |
+ src->context()->restore(); |
+ |
+ // Check the pixel we previously made transparent, it should have gotten |
+ // fixed back up to white. |
+ |
+ // The current version doesn't fixup transparency when there is no layer. |
+ // This seems not to be necessary, so we don't bother, but if it becomes |
+ // necessary, this line should be uncommented. |
+ //EXPECT_EQ(Color(Color::white), getPixelAt(src->context(), 2, 2)); |
+} |
+ |
+// Tests scale mode with an additional copy for transparency. This will happen |
+// if we have a scaled textbox, for example. WebKit will create a new |
+// transparency layer, draw the text field, then draw the text into it, then |
+// composite this down with an opacity. |
+TEST(TransparencyHelperWin, ScaleTransparency) |
+{ |
+ // Create an opaque white buffer. |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ FloatRect fullBuffer(0, 0, 16, 16); |
+ src->context()->fillRect(fullBuffer, Color::white); |
+ |
+ // Make another layer (which duplicates how WebKit will make this). We fill |
+ // the top half with red, and have the layer be 50% opaque. |
+ src->context()->beginTransparencyLayer(0.5); |
+ FloatRect topHalf(0, 0, 16, 8); |
+ src->context()->fillRect(topHalf, Color(0xFFFF0000)); |
+ |
+ // Scale by 2x. |
+ src->context()->save(); |
+ TransformationMatrix scale; |
+ scale.scale(2.0); |
+ src->context()->concatCTM(scale); |
+ |
+ // Make a layer inset two pixels (because of scaling, this is 2->14). And |
+ // will it with 50% black. |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::OpaqueCompositeLayer, |
+ TransparencyHelperWin::ScaleTransform, |
+ IntRect(1, 1, 6, 6)); |
+ |
+ helper.context()->fillRect(helper.drawRect(), Color(0x7f000000)); |
+ clearTopLayerAlphaChannel(helper.context()); |
+ } |
+ |
+ // Finish the layer. |
+ src->context()->restore(); |
+ src->context()->endTransparencyLayer(); |
+ |
+ Color redBackground(0xFFFF8181); // 50% red composited on white. |
+ EXPECT_EQ(redBackground, getPixelAt(src->context(), 0, 0)); |
+ EXPECT_EQ(redBackground, getPixelAt(src->context(), 1, 1)); |
+ |
+ // Top half (minus two pixel border) should be 50% gray atop opaque |
+ // red = 0xFF804141. Then that's composited with 50% transparency on solid |
+ // white = 0xFFC0A1A1. |
+ Color darkRed(0xFFC08181); |
+ EXPECT_EQ(darkRed, getPixelAt(src->context(), 2, 2)); |
+ EXPECT_EQ(darkRed, getPixelAt(src->context(), 7, 7)); |
+ |
+ // Bottom half (minus a two pixel border) should be a layer with 5% gray |
+ // with another 50% opacity composited atop white. |
+ Color darkWhite(0xFFC0C0C0); |
+ EXPECT_EQ(darkWhite, getPixelAt(src->context(), 8, 8)); |
+ EXPECT_EQ(darkWhite, getPixelAt(src->context(), 13, 13)); |
+ |
+ Color white(0xFFFFFFFF); // Background in the lower-right. |
+ EXPECT_EQ(white, getPixelAt(src->context(), 14, 14)); |
+ EXPECT_EQ(white, getPixelAt(src->context(), 15, 15)); |
+} |
+ |
+TEST(TransparencyHelperWin, Text) |
+{ |
+ std::auto_ptr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), false)); |
+ |
+ // Our text should end up 50% transparent blue-green. |
+ Color fullResult(0x80008080); |
+ |
+ { |
+ TransparencyHelperWin helper; |
+ helper.init(src->context(), |
+ TransparencyHelperWin::TextComposite, |
+ TransparencyHelperWin::KeepTransform, |
+ IntRect(0, 0, 16, 16)); |
+ helper.setTextCompositeColor(fullResult); |
+ |
+ // Write several different squares to simulate ClearType. These should |
+ // all reduce to 2/3 coverage. |
+ FloatRect pixel(0, 0, 1, 1); |
+ helper.context()->fillRect(pixel, 0xFFFF0000); |
+ pixel.move(1.0f, 0.0f); |
+ helper.context()->fillRect(pixel, 0xFF00FF00); |
+ pixel.move(1.0f, 0.0f); |
+ helper.context()->fillRect(pixel, 0xFF0000FF); |
+ pixel.move(1.0f, 0.0f); |
+ helper.context()->fillRect(pixel, 0xFF008080); |
+ pixel.move(1.0f, 0.0f); |
+ helper.context()->fillRect(pixel, 0xFF800080); |
+ pixel.move(1.0f, 0.0f); |
+ helper.context()->fillRect(pixel, 0xFF808000); |
+ |
+ // Try one with 100% coverage (opaque black). |
+ pixel.move(1.0f, 0.0f); |
+ helper.context()->fillRect(pixel, 0xFF000000); |
+ |
+ // Now mess with the alpha channel. |
+ clearTopLayerAlphaChannel(helper.context()); |
+ } |
+ |
+ Color oneThirdResult(0x55005555); // = fullResult * 2 / 3 |
+ EXPECT_EQ(oneThirdResult, getPixelAt(src->context(), 0, 0)); |
+ EXPECT_EQ(oneThirdResult, getPixelAt(src->context(), 1, 0)); |
+ EXPECT_EQ(oneThirdResult, getPixelAt(src->context(), 2, 0)); |
+ EXPECT_EQ(oneThirdResult, getPixelAt(src->context(), 3, 0)); |
+ EXPECT_EQ(oneThirdResult, getPixelAt(src->context(), 4, 0)); |
+ EXPECT_EQ(oneThirdResult, getPixelAt(src->context(), 5, 0)); |
+ EXPECT_EQ(fullResult, getPixelAt(src->context(), 6, 0)); |
+ EXPECT_EQ(Color::transparent, getPixelAt(src->context(), 7, 0)); |
+} |
+ |
+} // namespace WebCore |
Property changes on: webkit\tools\webcore_unit_tests\TransparencyWin_unittest.cpp |
___________________________________________________________________ |
Added: svn:mergeinfo |