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Side by Side Diff: ui/compositor/layer.h

Issue 10915140: Add the partial screen magnifier to Chrome OS. (Closed) Base URL: http://git.chromium.org/chromium/src.git@master
Patch Set: Rebase Created 8 years, 1 month ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 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 #ifndef UI_COMPOSITOR_LAYER_H_ 5 #ifndef UI_COMPOSITOR_LAYER_H_
6 #define UI_COMPOSITOR_LAYER_H_ 6 #define UI_COMPOSITOR_LAYER_H_
7 7
8 #include <string> 8 #include <string>
9 #include <vector> 9 #include <vector>
10 10
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161 // Change the grayscale of all pixels from this layer by this amount. 161 // Change the grayscale of all pixels from this layer by this amount.
162 // This effect will get "combined" with the inverted, saturate 162 // This effect will get "combined" with the inverted, saturate
163 // and brightness setting. 163 // and brightness setting.
164 float layer_grayscale() const { return layer_grayscale_; } 164 float layer_grayscale() const { return layer_grayscale_; }
165 void SetLayerGrayscale(float grayscale); 165 void SetLayerGrayscale(float grayscale);
166 166
167 // Return the target grayscale if animator is running, or the current 167 // Return the target grayscale if animator is running, or the current
168 // grayscale otherwise. 168 // grayscale otherwise.
169 float GetTargetGrayscale() const; 169 float GetTargetGrayscale() const;
170 170
171 // Zoom the background by a factor of |zoom|. The upper left corner of the
172 // zoomed area is offset from the top left corner of the layer by |x_offset|
173 // and |y_offset|. The effect is blended along the edge across |inset|
174 // pixels.
175 void SetBackgroundZoom(float x_offset, float y_offset, float zoom, int inset);
176
171 // Invert the layer. 177 // Invert the layer.
172 bool layer_inverted() const { return layer_inverted_; } 178 bool layer_inverted() const { return layer_inverted_; }
173 void SetLayerInverted(bool inverted); 179 void SetLayerInverted(bool inverted);
174 180
175 // Return the target opacity if animator is running, or the current opacity 181 // Return the target opacity if animator is running, or the current opacity
176 // otherwise. 182 // otherwise.
177 float GetTargetOpacity() const; 183 float GetTargetOpacity() const;
178 184
179 // Set a layer mask for a layer. 185 // Set a layer mask for a layer.
180 // Note the provided layer mask can neither have a layer mask itself nor can 186 // Note the provided layer mask can neither have a layer mask itself nor can
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327 virtual SkColor GetColorForAnimation() const OVERRIDE; 333 virtual SkColor GetColorForAnimation() const OVERRIDE;
328 334
329 void CreateWebLayer(); 335 void CreateWebLayer();
330 void RecomputeTransform(); 336 void RecomputeTransform();
331 void RecomputeDrawsContentAndUVRect(); 337 void RecomputeDrawsContentAndUVRect();
332 void RecomputeDebugBorderColor(); 338 void RecomputeDebugBorderColor();
333 339
334 // Set all filters which got applied to the layer. 340 // Set all filters which got applied to the layer.
335 void SetLayerFilters(); 341 void SetLayerFilters();
336 342
343 // Set all filters which got applied to the layer background.
344 void SetLayerBackgroundFilters();
345
337 const LayerType type_; 346 const LayerType type_;
338 347
339 Compositor* compositor_; 348 Compositor* compositor_;
340 349
341 scoped_refptr<ui::Texture> texture_; 350 scoped_refptr<ui::Texture> texture_;
342 351
343 Layer* parent_; 352 Layer* parent_;
344 353
345 // This layer's children, in bottom-to-top stacking order. 354 // This layer's children, in bottom-to-top stacking order.
346 std::vector<Layer*> children_; 355 std::vector<Layer*> children_;
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373 float layer_grayscale_; 382 float layer_grayscale_;
374 bool layer_inverted_; 383 bool layer_inverted_;
375 384
376 // The associated mask layer with this layer. 385 // The associated mask layer with this layer.
377 Layer* layer_mask_; 386 Layer* layer_mask_;
378 // The back link from the mask layer to it's associated masked layer. 387 // The back link from the mask layer to it's associated masked layer.
379 // We keep this reference for the case that if the mask layer gets deleted 388 // We keep this reference for the case that if the mask layer gets deleted
380 // while attached to the main layer before the main layer is deleted. 389 // while attached to the main layer before the main layer is deleted.
381 Layer* layer_mask_back_link_; 390 Layer* layer_mask_back_link_;
382 391
392 // When the layer is zoomed, this is the offset to the upper left corner of
393 // the area in the layer that is zoomed.
394 float zoom_x_offset_;
395 float zoom_y_offset_;
396
397 // The zoom factor to scale the layer by. Zooming is disabled when this is
398 // set to 1.
399 float zoom_;
400
401 // Width of the border in pixels, where the scaling is blended.
402 int zoom_inset_;
403
383 std::string name_; 404 std::string name_;
384 405
385 LayerDelegate* delegate_; 406 LayerDelegate* delegate_;
386 407
387 scoped_refptr<LayerAnimator> animator_; 408 scoped_refptr<LayerAnimator> animator_;
388 409
389 // Ownership of the layer is held through one of the strongly typed layer 410 // Ownership of the layer is held through one of the strongly typed layer
390 // pointers, depending on which sort of layer this is. 411 // pointers, depending on which sort of layer this is.
391 scoped_ptr<WebKit::WebContentLayer> content_layer_; 412 scoped_ptr<WebKit::WebContentLayer> content_layer_;
392 scoped_ptr<WebKit::WebExternalTextureLayer> texture_layer_; 413 scoped_ptr<WebKit::WebExternalTextureLayer> texture_layer_;
393 scoped_ptr<WebKit::WebSolidColorLayer> solid_color_layer_; 414 scoped_ptr<WebKit::WebSolidColorLayer> solid_color_layer_;
394 WebKit::WebLayer* web_layer_; 415 WebKit::WebLayer* web_layer_;
395 bool web_layer_is_accelerated_; 416 bool web_layer_is_accelerated_;
396 bool show_debug_borders_; 417 bool show_debug_borders_;
397 418
398 // If true, the layer scales the canvas and the texture with the device scale 419 // If true, the layer scales the canvas and the texture with the device scale
399 // factor as appropriate. When true, the texture size is in DIP. 420 // factor as appropriate. When true, the texture size is in DIP.
400 bool scale_content_; 421 bool scale_content_;
401 422
402 // A cached copy of |Compositor::device_scale_factor()|. 423 // A cached copy of |Compositor::device_scale_factor()|.
403 float device_scale_factor_; 424 float device_scale_factor_;
404 425
405 DISALLOW_COPY_AND_ASSIGN(Layer); 426 DISALLOW_COPY_AND_ASSIGN(Layer);
406 }; 427 };
407 428
408 } // namespace ui 429 } // namespace ui
409 430
410 #endif // UI_COMPOSITOR_LAYER_H_ 431 #endif // UI_COMPOSITOR_LAYER_H_
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