From cb100b891482c42e5d4d6a234e6d0bf60f2e416f Mon Sep 17 00:00:00 2001
From: "tc@google.com" <tc@google.com@0039d316-1c4b-4281-b951-d872f2087c98>
Date: Wed, 5 Aug 2009 18:00:42 +0000
Subject: Copy files to preserve version history.  Will be edited when I land
 Min-Yu's changes in http://codereview.chromium.org/160347 .

TBR=evan


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@22494 0039d316-1c4b-4281-b951-d872f2087c98
---
 skia/ext/vector_canvas_win.cc | 91 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 91 insertions(+)
 create mode 100644 skia/ext/vector_canvas_win.cc

(limited to 'skia/ext/vector_canvas_win.cc')

diff --git a/skia/ext/vector_canvas_win.cc b/skia/ext/vector_canvas_win.cc
new file mode 100644
index 0000000..75b7310
--- /dev/null
+++ b/skia/ext/vector_canvas_win.cc
@@ -0,0 +1,91 @@
+// Copyright (c) 2006-2008 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 "skia/ext/vector_canvas.h"
+
+#include "skia/ext/bitmap_platform_device_win.h"
+#include "skia/ext/vector_platform_device_win.h"
+
+namespace skia {
+
+VectorCanvas::VectorCanvas() {
+}
+
+VectorCanvas::VectorCanvas(HDC dc, int width, int height) {
+  bool initialized = initialize(dc, width, height);
+  if (!initialized)
+    __debugbreak();
+}
+
+VectorCanvas::~VectorCanvas() {
+}
+
+bool VectorCanvas::initialize(HDC context, int width, int height) {
+  SkDevice* device = createPlatformDevice(width, height, true, context);
+  if (!device)
+    return false;
+
+  setDevice(device);
+  device->unref();  // was created with refcount 1, and setDevice also refs
+  return true;
+}
+
+SkBounder* VectorCanvas::setBounder(SkBounder* bounder) {
+  if (!IsTopDeviceVectorial())
+    return PlatformCanvas::setBounder(bounder);
+
+  // This function isn't used in the code. Verify this assumption.
+  SkASSERT(false);
+  return NULL;
+}
+
+SkDevice* VectorCanvas::createDevice(SkBitmap::Config config,
+                                     int width, int height,
+                                     bool is_opaque, bool isForLayer) {
+  SkASSERT(config == SkBitmap::kARGB_8888_Config);
+  return createPlatformDevice(width, height, is_opaque, NULL);
+}
+
+SkDrawFilter* VectorCanvas::setDrawFilter(SkDrawFilter* filter) {
+  // This function isn't used in the code. Verify this assumption.
+  SkASSERT(false);
+  return NULL;
+}
+
+SkDevice* VectorCanvas::createPlatformDevice(int width,
+                                             int height, bool is_opaque,
+                                             HANDLE shared_section) {
+  if (!is_opaque) {
+    // TODO(maruel):  http://b/1184002 1184002 When restoring a semi-transparent
+    // layer, i.e. merging it, we need to rasterize it because GDI doesn't
+    // support transparency except for AlphaBlend(). Right now, a
+    // BitmapPlatformDevice is created when VectorCanvas think a saveLayers()
+    // call is being done. The way to save a layer would be to create an
+    // EMF-based VectorDevice and have this device registers the drawing. When
+    // playing back the device into a bitmap, do it at the printer's dpi instead
+    // of the layout's dpi (which is much lower).
+    return BitmapPlatformDevice::create(width, height,
+                                        is_opaque, shared_section);
+  }
+
+  // TODO(maruel):  http://b/1183870 Look if it would be worth to increase the
+  // resolution by ~10x (any worthy factor) to increase the rendering precision
+  // (think about printing) while using a relatively low dpi. This happens
+  // because we receive float as input but the GDI functions works with
+  // integers. The idea is to premultiply the matrix with this factor and
+  // multiply each SkScalar that are passed to SkScalarRound(value) as
+  // SkScalarRound(value * 10). Safari is already doing the same for text
+  // rendering.
+  SkASSERT(shared_section);
+  PlatformDevice* device = VectorPlatformDevice::create(
+      reinterpret_cast<HDC>(shared_section), width, height);
+  return device;
+}
+
+bool VectorCanvas::IsTopDeviceVectorial() const {
+  return getTopPlatformDevice().IsVectorial();
+}
+
+}  // namespace skia
+
-- 
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