Wire up windowless plugins. Mostly Mac related, some cross

app/gfx/canvas_mac.mm

+// 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.
+
+#import <Cocoa/Cocoa.h>
+
+#include "app/gfx/canvas.h"
+
+#include "app/gfx/font.h"
+#include "app/l10n_util.h"
+#include "base/gfx/rect.h"
+#include "base/scoped_cftyperef.h"
+#include "base/sys_string_conversions.h"
+#include "third_party/skia/include/core/SkShader.h"
+
+namespace gfx {
+
+Canvas::Canvas(int width, int height, bool is_opaque)
+    : skia::PlatformCanvas(width, height, is_opaque) {
+}
+
+Canvas::Canvas() : skia::PlatformCanvas() {
+}
+
+Canvas::~Canvas() {
+}
+
+// static
+void Canvas::SizeStringInt(const std::wstring& text,
+                           const gfx::Font& font,
+                           int *width, int *height, int flags) {
+  *width = font.GetStringWidth(text);
+  *height = font.height();
+}
+
+void Canvas::DrawStringInt(const std::wstring& text, const gfx::Font& font,
+                           const SkColor& color, int x, int y, int w, int h,
+                           int flags) {
+  if (!IntersectsClipRectInt(x, y, w, h))
+    return;
+
+  CGContextRef context = beginPlatformPaint();
+  CGContextSaveGState(context);
+
+  NSColor* ns_color = [NSColor colorWithDeviceRed:SkColorGetR(color) / 255.0
+                                            green:SkColorGetG(color) / 255.0
+                                             blue:SkColorGetB(color) / 255.0
+                                            alpha:1.0];
+  NSMutableParagraphStyle *ns_style =
+      [[[NSParagraphStyle alloc] init] autorelease];
+  if (flags & TEXT_ALIGN_CENTER)
+    [ns_style setAlignment:NSCenterTextAlignment];
+  // TODO(awalker): Implement the rest of the Canvas text flags
+
+  NSDictionary* attributes =
+      [NSDictionary dictionaryWithObjectsAndKeys:
+          font.nativeFont(), NSFontAttributeName,
+          ns_color, NSForegroundColorAttributeName,
+          ns_style, NSParagraphStyleAttributeName,
+          nil];
+
+  NSAttributedString* ns_string =
+      [[[NSAttributedString alloc] initWithString:base::SysWideToNSString(text)
+                                        attributes:attributes] autorelease];
+  scoped_cftyperef<CTFramesetterRef> framesetter(
+      CTFramesetterCreateWithAttributedString(reinterpret_cast<CFAttributedStringRef>(ns_string)));
+
+  CGRect text_bounds = CGRectMake(x, y, w, h);
+  CGMutablePathRef path = CGPathCreateMutable();
+  CGPathAddRect(path, NULL, text_bounds);
+
+  scoped_cftyperef<CTFrameRef> frame(
+      CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), path, NULL));
+  CTFrameDraw(frame, context);
+  CGContextRestoreGState(context);
+  endPlatformPaint();
+}
+
+}  // namespace gfx