| // Copyright 2014 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 "cc/output/overlay_strategy_single_on_top.h" |
| |
| #include <limits> |
| |
| #include "cc/quads/draw_quad.h" |
| #include "cc/quads/solid_color_draw_quad.h" |
| #include "cc/quads/stream_video_draw_quad.h" |
| #include "cc/quads/texture_draw_quad.h" |
| #include "ui/gfx/geometry/point3_f.h" |
| #include "ui/gfx/geometry/rect_conversions.h" |
| #include "ui/gfx/transform.h" |
| |
| namespace cc { |
| |
| OverlayStrategySingleOnTop::OverlayStrategySingleOnTop( |
| OverlayCandidateValidator* capability_checker, |
| ResourceProvider* resource_provider) |
| : capability_checker_(capability_checker), |
| resource_provider_(resource_provider) {} |
| |
| bool OverlayStrategySingleOnTop::IsOverlayQuad(const DrawQuad* draw_quad) { |
| unsigned int resource_id; |
| switch (draw_quad->material) { |
| case DrawQuad::TEXTURE_CONTENT: |
| resource_id = TextureDrawQuad::MaterialCast(draw_quad)->resource_id; |
| break; |
| case DrawQuad::STREAM_VIDEO_CONTENT: |
| resource_id = StreamVideoDrawQuad::MaterialCast(draw_quad)->resource_id; |
| break; |
| default: |
| return false; |
| } |
| return resource_provider_->AllowOverlay(resource_id); |
| } |
| |
| bool OverlayStrategySingleOnTop::GetTextureQuadInfo( |
| const TextureDrawQuad& quad, |
| OverlayCandidate* quad_info) { |
| gfx::OverlayTransform overlay_transform = |
| OverlayCandidate::GetOverlayTransform(quad.quadTransform(), quad.flipped); |
| if (quad.background_color != SK_ColorTRANSPARENT || |
| quad.premultiplied_alpha || |
| overlay_transform == gfx::OVERLAY_TRANSFORM_INVALID) |
| return false; |
| quad_info->resource_id = quad.resource_id; |
| quad_info->transform = overlay_transform; |
| quad_info->uv_rect = BoundingRect(quad.uv_top_left, quad.uv_bottom_right); |
| return true; |
| } |
| |
| bool OverlayStrategySingleOnTop::GetVideoQuadInfo( |
| const StreamVideoDrawQuad& quad, |
| OverlayCandidate* quad_info) { |
| gfx::OverlayTransform overlay_transform = |
| OverlayCandidate::GetOverlayTransform(quad.quadTransform(), false); |
| if (overlay_transform == gfx::OVERLAY_TRANSFORM_INVALID) |
| return false; |
| if (!quad.matrix.IsScaleOrTranslation()) { |
| // We cannot handle anything other than scaling & translation for texture |
| // coordinates yet. |
| return false; |
| } |
| quad_info->resource_id = quad.resource_id; |
| quad_info->transform = overlay_transform; |
| |
| gfx::Point3F uv0 = gfx::Point3F(0, 0, 0); |
| gfx::Point3F uv1 = gfx::Point3F(1, 1, 0); |
| quad.matrix.TransformPoint(&uv0); |
| quad.matrix.TransformPoint(&uv1); |
| gfx::Vector3dF delta = uv1 - uv0; |
| if (delta.x() < 0) { |
| quad_info->transform = OverlayCandidate::ModifyTransform( |
| quad_info->transform, gfx::OVERLAY_TRANSFORM_FLIP_HORIZONTAL); |
| float x0 = uv0.x(); |
| uv0.set_x(uv1.x()); |
| uv1.set_x(x0); |
| delta.set_x(-delta.x()); |
| } |
| |
| if (delta.y() < 0) { |
| // In this situation, uv0y < uv1y. Since we overlay inverted, a request |
| // to invert the source texture means we can just output the texture |
| // normally and it will be correct. |
| quad_info->uv_rect = gfx::RectF(uv0.x(), uv1.y(), delta.x(), -delta.y()); |
| } else { |
| quad_info->transform = OverlayCandidate::ModifyTransform( |
| quad_info->transform, gfx::OVERLAY_TRANSFORM_FLIP_VERTICAL); |
| quad_info->uv_rect = gfx::RectF(uv0.x(), uv0.y(), delta.x(), delta.y()); |
| } |
| return true; |
| } |
| |
| bool OverlayStrategySingleOnTop::GetCandidateQuadInfo( |
| const DrawQuad& draw_quad, |
| OverlayCandidate* quad_info) { |
| // All quad checks. |
| if (draw_quad.needs_blending || draw_quad.shared_quad_state->opacity != 1.f || |
| draw_quad.shared_quad_state->blend_mode != SkXfermode::kSrcOver_Mode) |
| return false; |
| |
| if (draw_quad.material == DrawQuad::TEXTURE_CONTENT) { |
| const TextureDrawQuad& quad = *TextureDrawQuad::MaterialCast(&draw_quad); |
| if (!GetTextureQuadInfo(quad, quad_info)) |
| return false; |
| } else if (draw_quad.material == DrawQuad::STREAM_VIDEO_CONTENT) { |
| const StreamVideoDrawQuad& quad = |
| *StreamVideoDrawQuad::MaterialCast(&draw_quad); |
| if (!GetVideoQuadInfo(quad, quad_info)) |
| return false; |
| } |
| |
| quad_info->format = RGBA_8888; |
| quad_info->display_rect = OverlayCandidate::GetOverlayRect( |
| draw_quad.quadTransform(), draw_quad.rect); |
| return true; |
| } |
| |
| bool OverlayStrategySingleOnTop::IsInvisibleQuad(const DrawQuad* draw_quad) { |
| if (draw_quad->material == DrawQuad::SOLID_COLOR) { |
| const SolidColorDrawQuad* solid_quad = |
| SolidColorDrawQuad::MaterialCast(draw_quad); |
| SkColor color = solid_quad->color; |
| float opacity = solid_quad->opacity(); |
| float alpha = (SkColorGetA(color) * (1.0f / 255.0f)) * opacity; |
| // Ignore transparent solid color quads. |
| return solid_quad->ShouldDrawWithBlending() && |
| alpha < std::numeric_limits<float>::epsilon(); |
| } |
| return false; |
| } |
| |
| bool OverlayStrategySingleOnTop::Attempt( |
| RenderPassList* render_passes_in_draw_order, |
| OverlayCandidateList* candidate_list) { |
| // Only attempt to handle very simple case for now. |
| if (!capability_checker_) |
| return false; |
| |
| RenderPass* root_render_pass = render_passes_in_draw_order->back(); |
| DCHECK(root_render_pass); |
| |
| OverlayCandidate candidate; |
| QuadList& quad_list = root_render_pass->quad_list; |
| auto candidate_iterator = quad_list.end(); |
| for (auto it = quad_list.begin(); it != quad_list.end(); ++it) { |
| const DrawQuad* draw_quad = *it; |
| if (IsOverlayQuad(draw_quad)) { |
| // Check that no prior quads overlap it. |
| bool intersects = false; |
| gfx::RectF rect = draw_quad->rect; |
| draw_quad->quadTransform().TransformRect(&rect); |
| for (auto overlap_iter = quad_list.cbegin(); overlap_iter != it; |
| ++overlap_iter) { |
| gfx::RectF overlap_rect = overlap_iter->rect; |
| overlap_iter->quadTransform().TransformRect(&overlap_rect); |
| if (rect.Intersects(overlap_rect) && !IsInvisibleQuad(*overlap_iter)) { |
| intersects = true; |
| break; |
| } |
| } |
| if (intersects || !GetCandidateQuadInfo(*draw_quad, &candidate)) |
| continue; |
| candidate_iterator = it; |
| break; |
| } |
| } |
| if (candidate_iterator == quad_list.end()) |
| return false; |
| |
| // Add our primary surface. |
| OverlayCandidateList candidates; |
| OverlayCandidate main_image; |
| main_image.display_rect = root_render_pass->output_rect; |
| candidates.push_back(main_image); |
| |
| // Add the overlay. |
| candidate.plane_z_order = 1; |
| candidates.push_back(candidate); |
| |
| // Check for support. |
| capability_checker_->CheckOverlaySupport(&candidates); |
| |
| // If the candidate can be handled by an overlay, create a pass for it. |
| if (candidates[1].overlay_handled) { |
| quad_list.EraseAndInvalidateAllPointers(candidate_iterator); |
| candidate_list->swap(candidates); |
| return true; |
| } |
| return false; |
| } |
| |
| } // namespace cc |