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1 // Copyright 2011 The Chromium Authors. All rights reserved. | 1 // Copyright 2011 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 #include "cc/trees/layer_tree_host_common.h" | 5 #include "cc/trees/layer_tree_host_common.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 | 8 |
9 #include "base/debug/trace_event.h" | 9 #include "base/debug/trace_event.h" |
10 #include "cc/base/math_util.h" | 10 #include "cc/base/math_util.h" |
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74 if (target_surface_rect.Contains(layer_rect_in_target_space)) | 74 if (target_surface_rect.Contains(layer_rect_in_target_space)) |
75 return layer_bound_rect; | 75 return layer_bound_rect; |
76 | 76 |
77 // If the layer doesn't fill up the entire surface, then find the part of | 77 // If the layer doesn't fill up the entire surface, then find the part of |
78 // the surface rect where the layer could be visible. This avoids trying to | 78 // the surface rect where the layer could be visible. This avoids trying to |
79 // project surface rect points that are behind the projection point. | 79 // project surface rect points that are behind the projection point. |
80 gfx::Rect minimal_surface_rect = target_surface_rect; | 80 gfx::Rect minimal_surface_rect = target_surface_rect; |
81 minimal_surface_rect.Intersect(layer_rect_in_target_space); | 81 minimal_surface_rect.Intersect(layer_rect_in_target_space); |
82 | 82 |
83 if (minimal_surface_rect.IsEmpty()) | 83 if (minimal_surface_rect.IsEmpty()) |
84 return gfx::Rect(); | 84 return gfx::Rect(); |
85 | 85 |
86 // Project the corners of the target surface rect into the layer space. | 86 // Project the corners of the target surface rect into the layer space. |
87 // This bounding rectangle may be larger than it needs to be (being | 87 // This bounding rectangle may be larger than it needs to be (being |
88 // axis-aligned), but is a reasonable filter on the space to consider. | 88 // axis-aligned), but is a reasonable filter on the space to consider. |
89 // Non-invertible transforms will create an empty rect here. | 89 // Non-invertible transforms will create an empty rect here. |
90 | 90 |
91 gfx::Transform surface_to_layer(gfx::Transform::kSkipInitialization); | 91 gfx::Transform surface_to_layer(gfx::Transform::kSkipInitialization); |
92 if (!transform.GetInverse(&surface_to_layer)) { | 92 if (!transform.GetInverse(&surface_to_layer)) { |
93 // Because we cannot use the surface bounds to determine what portion of | 93 // Because we cannot use the surface bounds to determine what portion of |
94 // the layer is visible, we must conservatively assume the full layer is | 94 // the layer is visible, we must conservatively assume the full layer is |
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902 } | 902 } |
903 next_scroll_compensation_matrix = | 903 next_scroll_compensation_matrix = |
904 inverse_surface_draw_transform * next_scroll_compensation_matrix * | 904 inverse_surface_draw_transform * next_scroll_compensation_matrix * |
905 layer->render_surface()->draw_transform(); | 905 layer->render_surface()->draw_transform(); |
906 } | 906 } |
907 | 907 |
908 return next_scroll_compensation_matrix; | 908 return next_scroll_compensation_matrix; |
909 } | 909 } |
910 | 910 |
911 template <typename LayerType> | 911 template <typename LayerType> |
912 static inline void UpdateLayerDrawProperties( | |
danakj
2014/06/12 16:00:46
rename to UpdateLayerScaleDrawProperties, this nam
| |
913 LayerType* layer, | |
914 float ideal_contents_scale, | |
915 float maximum_animation_contents_scale, | |
916 float page_scale_factor, | |
917 float device_scale_factor) { | |
918 layer->draw_properties().ideal_contents_scale = ideal_contents_scale; | |
919 layer->draw_properties().maximum_animation_contents_scale = | |
920 maximum_animation_contents_scale; | |
921 layer->draw_properties().page_scale_factor = page_scale_factor; | |
922 layer->draw_properties().device_scale_factor = device_scale_factor; | |
923 } | |
924 | |
925 template <typename LayerType> | |
912 static inline void CalculateContentsScale( | 926 static inline void CalculateContentsScale( |
913 LayerType* layer, | 927 LayerType* layer, |
914 float contents_scale, | 928 float contents_scale, |
915 float device_scale_factor, | 929 float device_scale_factor, |
916 float page_scale_factor, | 930 float page_scale_factor, |
917 float maximum_animation_contents_scale, | 931 float maximum_animation_contents_scale, |
918 bool animating_transform_to_screen) { | 932 bool animating_transform_to_screen) { |
919 layer->CalculateContentsScale(contents_scale, | 933 layer->CalculateContentsScale(contents_scale, |
920 device_scale_factor, | 934 device_scale_factor, |
921 page_scale_factor, | 935 page_scale_factor, |
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1733 layer, | 1747 layer, |
1734 globals.can_adjust_raster_scales, | 1748 globals.can_adjust_raster_scales, |
1735 ideal_contents_scale, | 1749 ideal_contents_scale, |
1736 globals.device_scale_factor, | 1750 globals.device_scale_factor, |
1737 data_from_ancestor.in_subtree_of_page_scale_application_layer | 1751 data_from_ancestor.in_subtree_of_page_scale_application_layer |
1738 ? globals.page_scale_factor | 1752 ? globals.page_scale_factor |
1739 : 1.f, | 1753 : 1.f, |
1740 combined_maximum_animation_contents_scale, | 1754 combined_maximum_animation_contents_scale, |
1741 animating_transform_to_screen); | 1755 animating_transform_to_screen); |
1742 | 1756 |
1757 UpdateLayerDrawProperties( | |
1758 layer, | |
1759 ideal_contents_scale, | |
1760 combined_maximum_animation_contents_scale, | |
1761 data_from_ancestor.in_subtree_of_page_scale_application_layer | |
1762 ? globals.page_scale_factor | |
1763 : 1.f, | |
1764 globals.device_scale_factor); | |
1765 | |
1766 LayerType* mask_layer = layer->mask_layer(); | |
1767 if (mask_layer) { | |
1768 UpdateLayerDrawProperties( | |
1769 mask_layer, | |
1770 ideal_contents_scale, | |
1771 combined_maximum_animation_contents_scale, | |
1772 data_from_ancestor.in_subtree_of_page_scale_application_layer | |
1773 ? globals.page_scale_factor | |
1774 : 1.f, | |
1775 globals.device_scale_factor); | |
1776 } | |
1777 | |
1778 LayerType* replica_mask_layer = | |
1779 layer->replica_layer() ? layer->replica_layer()->mask_layer() : NULL; | |
1780 if (replica_mask_layer) { | |
1781 UpdateLayerDrawProperties( | |
1782 replica_mask_layer, | |
1783 ideal_contents_scale, | |
1784 combined_maximum_animation_contents_scale, | |
1785 data_from_ancestor.in_subtree_of_page_scale_application_layer | |
1786 ? globals.page_scale_factor | |
1787 : 1.f, | |
1788 globals.device_scale_factor); | |
1789 } | |
1790 | |
1743 // The draw_transform that gets computed below is effectively the layer's | 1791 // The draw_transform that gets computed below is effectively the layer's |
1744 // draw_transform, unless the layer itself creates a render_surface. In that | 1792 // draw_transform, unless the layer itself creates a render_surface. In that |
1745 // case, the render_surface re-parents the transforms. | 1793 // case, the render_surface re-parents the transforms. |
1746 layer_draw_properties.target_space_transform = combined_transform; | 1794 layer_draw_properties.target_space_transform = combined_transform; |
1747 // M[draw] = M[parent] * LT * S[layer2content] | 1795 // M[draw] = M[parent] * LT * S[layer2content] |
1748 layer_draw_properties.target_space_transform.Scale( | 1796 layer_draw_properties.target_space_transform.Scale( |
1749 SK_MScalar1 / layer->contents_scale_x(), | 1797 SK_MScalar1 / layer->contents_scale_x(), |
1750 SK_MScalar1 / layer->contents_scale_y()); | 1798 SK_MScalar1 / layer->contents_scale_y()); |
1751 | 1799 |
1752 // The layer's screen_space_transform represents the transform between root | 1800 // The layer's screen_space_transform represents the transform between root |
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2407 inputs->current_render_surface_layer_list_id); | 2455 inputs->current_render_surface_layer_list_id); |
2408 | 2456 |
2409 // The dummy layer list should not have been used. | 2457 // The dummy layer list should not have been used. |
2410 DCHECK_EQ(0u, dummy_layer_list.size()); | 2458 DCHECK_EQ(0u, dummy_layer_list.size()); |
2411 // A root layer render_surface should always exist after | 2459 // A root layer render_surface should always exist after |
2412 // CalculateDrawProperties. | 2460 // CalculateDrawProperties. |
2413 DCHECK(inputs->root_layer->render_surface()); | 2461 DCHECK(inputs->root_layer->render_surface()); |
2414 } | 2462 } |
2415 | 2463 |
2416 } // namespace cc | 2464 } // namespace cc |
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