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Diffstat (limited to 'WebKit/chromium/tests/TransparencyWinTest.cpp')
| -rw-r--r-- | WebKit/chromium/tests/TransparencyWinTest.cpp | 693 |
1 files changed, 0 insertions, 693 deletions
diff --git a/WebKit/chromium/tests/TransparencyWinTest.cpp b/WebKit/chromium/tests/TransparencyWinTest.cpp deleted file mode 100644 index ed7f12f..0000000 --- a/WebKit/chromium/tests/TransparencyWinTest.cpp +++ /dev/null @@ -1,693 +0,0 @@ -/* - * Copyright (C) 2010 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 "TransparencyWin.h" - -#include "AffineTransform.h" -#include "ImageBuffer.h" - -#include <gtest/gtest.h> -#include <windows.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 innerRc; - innerRc.left = x; - innerRc.top = y; - innerRc.right = x + w; - innerRc.bottom = y + h; - FillRect(dc, &innerRc, - 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(TransparencyWin, NoLayer) -{ - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(17, 16), ColorSpaceDeviceRGB)); - - // KeepTransform - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::NoLayer, - TransparencyWin::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)); - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::NoLayer, - TransparencyWin::ScaleTransform, - IntRect(2, 2, 6, 6)); - helper.composite(); - - // 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(TransparencyWin, WhiteLayer) -{ - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), ColorSpaceDeviceRGB)); - - // KeepTransform - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::WhiteLayer, - TransparencyWin::KeepTransform, - IntRect(1, 1, 14, 12)); - helper.composite(); - - EXPECT_TRUE(src->context() != helper.context()); - EXPECT_TRUE(IntSize(14, 12) == helper.m_layerSize); - EXPECT_TRUE(IntRect(1, 1, 14, 12) == helper.drawRect()); - } - - // Untransform - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::WhiteLayer, - TransparencyWin::Untransform, - IntRect(1, 1, 14, 12)); - helper.composite(); - - 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)); - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::WhiteLayer, - TransparencyWin::ScaleTransform, - IntRect(2, 2, 6, 6)); - helper.composite(); - - // 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(TransparencyWin, TextComposite) -{ - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), ColorSpaceDeviceRGB)); - - // KeepTransform is the only valid transform mode for TextComposite. - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::TextComposite, - TransparencyWin::KeepTransform, - IntRect(1, 1, 14, 12)); - helper.composite(); - - EXPECT_TRUE(src->context() != helper.context()); - EXPECT_TRUE(IntSize(14, 12) == helper.m_layerSize); - EXPECT_TRUE(IntRect(1, 1, 14, 12) == helper.drawRect()); - } -} - -TEST(TransparencyWin, OpaqueCompositeLayer) -{ - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), ColorSpaceDeviceRGB)); - - // KeepTransform - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::OpaqueCompositeLayer, - TransparencyWin::KeepTransform, - IntRect(1, 1, 14, 12)); - helper.composite(); - - 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); - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::OpaqueCompositeLayer, - TransparencyWin::KeepTransform, - IntRect(1, 1, 14, 14)); - helper.composite(); - - 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 - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::OpaqueCompositeLayer, - TransparencyWin::Untransform, - IntRect(1, 1, 14, 12)); - helper.composite(); - - 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)); - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::OpaqueCompositeLayer, - TransparencyWin::ScaleTransform, - IntRect(2, 2, 6, 6)); - helper.composite(); - - // 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(TransparencyWin, WhiteLayerPixelTest) -{ - // Make a total transparent buffer, and draw the white layer inset by 1 px. - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), ColorSpaceDeviceRGB)); - - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::WhiteLayer, - TransparencyWin::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()); - helper.composite(); - } - - // 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(TransparencyWin, OpaqueCompositeLayerPixel) -{ - Color red(0xFFFF0000), darkRed(0xFFBF0000); - Color green(0xFF00FF00); - - // Make a red bottom layer, followed by a half green next layer @ 50%. - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), ColorSpaceDeviceRGB)); - - FloatRect fullRect(0, 0, 16, 16); - src->context()->fillRect(fullRect, red, ColorSpaceDeviceRGB); - src->context()->beginTransparencyLayer(0.5); - FloatRect rightHalf(8, 0, 8, 16); - src->context()->fillRect(rightHalf, green, ColorSpaceDeviceRGB); - - // Make a transparency layer inset by one pixel, and fill it inset by - // another pixel with 50% black. - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::OpaqueCompositeLayer, - TransparencyWin::KeepTransform, - IntRect(1, 1, 14, 14)); - - FloatRect inner(2, 2, 12, 12); - helper.context()->fillRect(inner, Color(0x7f000000), ColorSpaceDeviceRGB); - // 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); - helper.composite(); - } - - // 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(0xFF803f00); - EXPECT_EQ(darkGreenRed, getPixelAt(src->context(), 13, 13)); - - // 50% green on top of red = FF808000 (rounded to what Skia will produce). - Color greenRed(0xFF807F00); - 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(TransparencyWin, TranslateOpaqueCompositeLayer) -{ - // Fill with white. - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), ColorSpaceDeviceRGB)); - Color white(0xFFFFFFFF); - FloatRect fullRect(0, 0, 16, 16); - src->context()->fillRect(fullRect, white, ColorSpaceDeviceRGB); - - // 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. - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::OpaqueCompositeLayer, - TransparencyWin::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, ColorSpaceDeviceRGB); - helper.composite(); - } - - 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(TransparencyWin, RotateOpaqueCompositeLayer) -{ - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), ColorSpaceDeviceRGB)); - - // The background is white. - Color white(0xFFFFFFFF); - FloatRect fullRect(0, 0, 16, 16); - src->context()->fillRect(fullRect, white, ColorSpaceDeviceRGB); - - // 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(); - AffineTransform cw90(0, 1, -1, 0, 0, 0); - 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, ColorSpaceDeviceRGB); - - // 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). - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::OpaqueCompositeLayer, - TransparencyWin::Untransform, - IntRect(1, -15, 14, 14)); - - // Fill with red. - helper.context()->fillRect(helper.drawRect(), Color(0x7f7f0000), ColorSpaceDeviceRGB); - clearTopLayerAlphaChannel(helper.context()); - helper.composite(); - } - - // 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(0xFF808080); - 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(0xFFdfbfbf); - Color redgray(0xFF9f8080); - 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(TransparencyWin, TranslateScaleOpaqueCompositeLayer) -{ - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), ColorSpaceDeviceRGB)); - - // The background is white on top with red on bottom. - Color white(0xFFFFFFFF); - FloatRect topRect(0, 0, 16, 8); - src->context()->fillRect(topRect, white, ColorSpaceDeviceRGB); - Color red(0xFFFF0000); - FloatRect bottomRect(0, 8, 16, 8); - src->context()->fillRect(bottomRect, red, ColorSpaceDeviceRGB); - - src->context()->save(); - - // Translate left by one pixel. - AffineTransform left; - left.translate(-1, 0); - - // Scale by 2x. - AffineTransform scale; - scale.scale(2.0); - src->context()->concatCTM(scale); - - // Then translate up by one pixel (which will actually be 2 due to scaling). - AffineTransform 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). - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::OpaqueCompositeLayer, - TransparencyWin::KeepTransform, - IntRect(1, -15, 14, 14)); - - // Fill with red. - helper.context()->fillRect(helper.drawRect(), Color(0x7f7f0000), ColorSpaceDeviceRGB); - clearTopLayerAlphaChannel(helper.context()); - helper.composite(); - } -} - -// Tests scale mode with no additional copy. -TEST(TransparencyWin, Scale) -{ - // Create an opaque white buffer. - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), ColorSpaceDeviceRGB)); - FloatRect fullBuffer(0, 0, 16, 16); - src->context()->fillRect(fullBuffer, Color::white, ColorSpaceDeviceRGB); - - // Scale by 2x. - src->context()->save(); - AffineTransform scale; - scale.scale(2.0); - src->context()->concatCTM(scale); - - // Start drawing a rectangle from 1->4. This should get scaled to 2->8. - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::NoLayer, - TransparencyWin::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; - helper.composite(); - } - - 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(TransparencyWin, ScaleTransparency) -{ - // Create an opaque white buffer. - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), ColorSpaceDeviceRGB)); - FloatRect fullBuffer(0, 0, 16, 16); - src->context()->fillRect(fullBuffer, Color::white, ColorSpaceDeviceRGB); - - // 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), ColorSpaceDeviceRGB); - - // Scale by 2x. - src->context()->save(); - AffineTransform 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. - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::OpaqueCompositeLayer, - TransparencyWin::ScaleTransform, - IntRect(1, 1, 6, 6)); - - helper.context()->fillRect(helper.drawRect(), Color(0x7f000000), ColorSpaceDeviceRGB); - clearTopLayerAlphaChannel(helper.context()); - helper.composite(); - } - - // Finish the layer. - src->context()->restore(); - src->context()->endTransparencyLayer(); - - Color redBackground(0xFFFF8080); // 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(0xFFBF8080); - 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(0xFFBFBFBF); - 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(TransparencyWin, Text) -{ - OwnPtr<ImageBuffer> src(ImageBuffer::create(IntSize(16, 16), ColorSpaceDeviceRGB)); - - // Our text should end up 50% transparent blue-green. - Color fullResult(0x80008080); - - { - TransparencyWin helper; - helper.init(src->context(), - TransparencyWin::TextComposite, - TransparencyWin::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, ColorSpaceDeviceRGB); - pixel.move(1.0f, 0.0f); - helper.context()->fillRect(pixel, 0xFF00FF00, ColorSpaceDeviceRGB); - pixel.move(1.0f, 0.0f); - helper.context()->fillRect(pixel, 0xFF0000FF, ColorSpaceDeviceRGB); - pixel.move(1.0f, 0.0f); - helper.context()->fillRect(pixel, 0xFF008080, ColorSpaceDeviceRGB); - pixel.move(1.0f, 0.0f); - helper.context()->fillRect(pixel, 0xFF800080, ColorSpaceDeviceRGB); - pixel.move(1.0f, 0.0f); - helper.context()->fillRect(pixel, 0xFF808000, ColorSpaceDeviceRGB); - - // Try one with 100% coverage (opaque black). - pixel.move(1.0f, 0.0f); - helper.context()->fillRect(pixel, 0xFF000000, ColorSpaceDeviceRGB); - - // Now mess with the alpha channel. - clearTopLayerAlphaChannel(helper.context()); - helper.composite(); - } - - 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 |