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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #import <Cocoa/Cocoa.h> | 5 #import <Cocoa/Cocoa.h> |
6 | 6 |
7 #include "chrome/browser/renderer_host/backing_store_mac.h" | 7 #include "chrome/browser/renderer_host/backing_store_mac.h" |
8 | 8 |
9 #include "app/surface/transport_dib.h" | 9 #include "app/surface/transport_dib.h" |
10 #include "base/logging.h" | 10 #include "base/logging.h" |
11 #include "base/mac_util.h" | 11 #include "base/mac_util.h" |
12 #include "base/sys_info.h" | |
12 #include "chrome/browser/renderer_host/render_process_host.h" | 13 #include "chrome/browser/renderer_host/render_process_host.h" |
13 #include "chrome/browser/renderer_host/render_widget_host.h" | 14 #include "chrome/browser/renderer_host/render_widget_host.h" |
14 #include "chrome/browser/renderer_host/render_widget_host_view.h" | 15 #include "chrome/browser/renderer_host/render_widget_host_view.h" |
15 #include "skia/ext/platform_canvas.h" | 16 #include "skia/ext/platform_canvas.h" |
16 #include "third_party/skia/include/core/SkBitmap.h" | 17 #include "third_party/skia/include/core/SkBitmap.h" |
17 #include "third_party/skia/include/core/SkCanvas.h" | 18 #include "third_party/skia/include/core/SkCanvas.h" |
18 | 19 |
19 // Mac Backing Stores: | 20 // Mac Backing Stores: |
20 // | 21 // |
21 // Since backing stores are only ever written to or drawn into windows, we keep | 22 // Since backing stores are only ever written to or drawn into windows, we keep |
22 // our backing store in a CGLayer that can get cached in GPU memory. This | 23 // our backing store in a CGLayer that can get cached in GPU memory. This |
23 // allows acclerated drawing into the layer and lets scrolling and such happen | 24 // allows acclerated drawing into the layer and lets scrolling and such happen |
24 // all or mostly on the GPU, which is good for performance. | 25 // all or mostly on the GPU, which is good for performance. |
25 | 26 |
27 namespace { | |
28 | |
29 // Returns if this version of OS X has broken CGLayers, see | |
Mark Mentovai
2010/06/10 20:05:51
“Returns if” implies that this function doesn’t re
Nico
2010/06/10 20:10:30
Done.
| |
30 // http://crbug.com/45553 , comments 5 and 6. | |
31 bool NeedsLayerWorkaround() { | |
32 int32 os_major, os_minor, os_bugfix; | |
33 base::SysInfo::OperatingSystemVersionNumbers( | |
34 &os_major, &os_minor, &os_bugfix); | |
35 return os_major == 10 && os_minor == 5; | |
Mark Mentovai
2010/06/10 20:05:51
For paranoia’s sake:
return os_major < 10 || (o
Nico
2010/06/10 20:10:30
Uh, no :-)
rohitrao (ping after 24h)
2010/06/10 20:55:08
Why not? The specificity of checking for 10.5 sca
Nico
2010/06/10 21:08:04
'cause Chrome won't run on 10.4 (or OS 9 for that
| |
36 } | |
37 | |
38 } // namespace | |
39 | |
26 BackingStoreMac::BackingStoreMac(RenderWidgetHost* widget, | 40 BackingStoreMac::BackingStoreMac(RenderWidgetHost* widget, |
27 const gfx::Size& size) | 41 const gfx::Size& size) |
28 : BackingStore(widget, size) { | 42 : BackingStore(widget, size) { |
29 cg_layer_.reset(CreateCGLayer()); | 43 cg_layer_.reset(CreateCGLayer()); |
30 if (!cg_layer_) { | 44 if (!cg_layer_) { |
31 // The view isn't in a window yet. Use a CGBitmapContext for now. | 45 // The view isn't in a window yet. Use a CGBitmapContext for now. |
32 cg_bitmap_.reset(CreateCGBitmapContext()); | 46 cg_bitmap_.reset(CreateCGBitmapContext()); |
33 } | 47 } |
34 } | 48 } |
35 | 49 |
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137 // scroll. Thus, we only have to worry about pixels which will end up inside | 151 // scroll. Thus, we only have to worry about pixels which will end up inside |
138 // the clipping rectangle. (Note that the clipping rectangle is not | 152 // the clipping rectangle. (Note that the clipping rectangle is not |
139 // translated by the scroll.) | 153 // translated by the scroll.) |
140 | 154 |
141 // We assume |clip_rect| is contained within the backing store. | 155 // We assume |clip_rect| is contained within the backing store. |
142 DCHECK(clip_rect.bottom() <= size().height()); | 156 DCHECK(clip_rect.bottom() <= size().height()); |
143 DCHECK(clip_rect.right() <= size().width()); | 157 DCHECK(clip_rect.right() <= size().width()); |
144 | 158 |
145 if ((dx || dy) && abs(dx) < size().width() && abs(dy) < size().height()) { | 159 if ((dx || dy) && abs(dx) < size().width() && abs(dy) < size().height()) { |
146 if (cg_layer()) { | 160 if (cg_layer()) { |
147 scoped_cftyperef<CGLayerRef> new_layer(CreateCGLayer()); | 161 // See http://crbug.com/45553 , comments 5 and 6. |
162 static bool needs_layer_workaround = NeedsLayerWorkaround(); | |
148 | 163 |
149 // If the current view is in a window, the replacement must be too. | 164 scoped_cftyperef<CGLayerRef> new_layer; |
150 DCHECK(new_layer); | 165 CGContextRef layer; |
151 | 166 |
152 CGContextRef layer = CGLayerGetContext(new_layer); | 167 if (needs_layer_workaround) { |
153 CGContextDrawLayerAtPoint(layer, CGPointMake(0, 0), cg_layer()); | 168 new_layer.reset(CreateCGLayer()); |
169 // If the current view is in a window, the replacement must be too. | |
170 DCHECK(new_layer); | |
171 | |
172 layer = CGLayerGetContext(new_layer); | |
173 CGContextDrawLayerAtPoint(layer, CGPointMake(0, 0), cg_layer()); | |
174 } else { | |
175 layer = CGLayerGetContext(cg_layer()); | |
176 } | |
177 | |
154 CGContextSaveGState(layer); | 178 CGContextSaveGState(layer); |
155 CGContextClipToRect(layer, | 179 CGContextClipToRect(layer, |
156 CGRectMake(clip_rect.x(), | 180 CGRectMake(clip_rect.x(), |
157 size().height() - clip_rect.bottom(), | 181 size().height() - clip_rect.bottom(), |
158 clip_rect.width(), | 182 clip_rect.width(), |
159 clip_rect.height())); | 183 clip_rect.height())); |
160 CGContextDrawLayerAtPoint(layer, CGPointMake(dx, -dy), cg_layer()); | 184 CGContextDrawLayerAtPoint(layer, CGPointMake(dx, -dy), cg_layer()); |
161 CGContextRestoreGState(layer); | 185 CGContextRestoreGState(layer); |
162 cg_layer_.swap(new_layer); | 186 |
187 if (needs_layer_workaround) | |
188 cg_layer_.swap(new_layer); | |
163 } else { | 189 } else { |
164 // We don't have a layer, so scroll the contents of the CGBitmapContext. | 190 // We don't have a layer, so scroll the contents of the CGBitmapContext. |
165 scoped_cftyperef<CGContextRef> new_bitmap(CreateCGBitmapContext()); | |
166 scoped_cftyperef<CGImageRef> bitmap_image( | 191 scoped_cftyperef<CGImageRef> bitmap_image( |
167 CGBitmapContextCreateImage(cg_bitmap_)); | 192 CGBitmapContextCreateImage(cg_bitmap_)); |
168 CGContextDrawImage(new_bitmap, | 193 CGContextSaveGState(cg_bitmap_); |
169 CGRectMake(0, 0, size().width(), size().height()), | 194 CGContextClipToRect(cg_bitmap_, |
170 bitmap_image); | |
171 CGContextSaveGState(new_bitmap); | |
172 CGContextClipToRect(new_bitmap, | |
173 CGRectMake(clip_rect.x(), | 195 CGRectMake(clip_rect.x(), |
174 size().height() - clip_rect.bottom(), | 196 size().height() - clip_rect.bottom(), |
175 clip_rect.width(), | 197 clip_rect.width(), |
176 clip_rect.height())); | 198 clip_rect.height())); |
177 CGContextDrawImage(new_bitmap, | 199 CGContextDrawImage(cg_bitmap_, |
178 CGRectMake(dx, -dy, size().width(), size().height()), | 200 CGRectMake(dx, -dy, size().width(), size().height()), |
179 bitmap_image); | 201 bitmap_image); |
180 CGContextRestoreGState(new_bitmap); | 202 CGContextRestoreGState(cg_bitmap_); |
181 cg_bitmap_.swap(new_bitmap); | |
182 } | 203 } |
183 } | 204 } |
184 } | 205 } |
185 | 206 |
186 CGLayerRef BackingStoreMac::CreateCGLayer() { | 207 CGLayerRef BackingStoreMac::CreateCGLayer() { |
187 // The CGLayer should be optimized for drawing into the containing window, | 208 // The CGLayer should be optimized for drawing into the containing window, |
188 // so extract a CGContext corresponding to the window to be passed to | 209 // so extract a CGContext corresponding to the window to be passed to |
189 // CGLayerCreateWithContext. | 210 // CGLayerCreateWithContext. |
190 NSWindow* window = [render_widget_host()->view()->GetNativeView() window]; | 211 NSWindow* window = [render_widget_host()->view()->GetNativeView() window]; |
191 if ([window windowNumber] <= 0) { | 212 if ([window windowNumber] <= 0) { |
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215 CGContextRef context = CGBitmapContextCreate(NULL, | 236 CGContextRef context = CGBitmapContextCreate(NULL, |
216 size().width(), size().height(), | 237 size().width(), size().height(), |
217 8, size().width() * 4, | 238 8, size().width() * 4, |
218 mac_util::GetSystemColorSpace(), | 239 mac_util::GetSystemColorSpace(), |
219 kCGImageAlphaPremultipliedFirst | | 240 kCGImageAlphaPremultipliedFirst | |
220 kCGBitmapByteOrder32Host); | 241 kCGBitmapByteOrder32Host); |
221 DCHECK(context); | 242 DCHECK(context); |
222 | 243 |
223 return context; | 244 return context; |
224 } | 245 } |
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