| // Copyright 2012 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/software_renderer.h" |
| |
| #include "base/memory/ptr_util.h" |
| #include "base/trace_event/trace_event.h" |
| #include "cc/base/math_util.h" |
| #include "cc/output/copy_output_request.h" |
| #include "cc/output/output_surface.h" |
| #include "cc/output/output_surface_frame.h" |
| #include "cc/output/render_surface_filters.h" |
| #include "cc/output/renderer_settings.h" |
| #include "cc/output/software_output_device.h" |
| #include "cc/quads/debug_border_draw_quad.h" |
| #include "cc/quads/picture_draw_quad.h" |
| #include "cc/quads/render_pass_draw_quad.h" |
| #include "cc/quads/solid_color_draw_quad.h" |
| #include "cc/quads/texture_draw_quad.h" |
| #include "cc/quads/tile_draw_quad.h" |
| #include "cc/resources/scoped_resource.h" |
| #include "skia/ext/opacity_filter_canvas.h" |
| #include "third_party/skia/include/core/SkCanvas.h" |
| #include "third_party/skia/include/core/SkColor.h" |
| #include "third_party/skia/include/core/SkImageFilter.h" |
| #include "third_party/skia/include/core/SkMatrix.h" |
| #include "third_party/skia/include/core/SkPath.h" |
| #include "third_party/skia/include/core/SkPoint.h" |
| #include "third_party/skia/include/core/SkShader.h" |
| #include "third_party/skia/include/effects/SkLayerRasterizer.h" |
| #include "ui/gfx/geometry/rect_conversions.h" |
| #include "ui/gfx/skia_util.h" |
| #include "ui/gfx/transform.h" |
| |
| namespace cc { |
| namespace { |
| |
| static inline bool IsScalarNearlyInteger(SkScalar scalar) { |
| return SkScalarNearlyZero(scalar - SkScalarRoundToScalar(scalar)); |
| } |
| |
| bool IsScaleAndIntegerTranslate(const SkMatrix& matrix) { |
| return IsScalarNearlyInteger(matrix[SkMatrix::kMTransX]) && |
| IsScalarNearlyInteger(matrix[SkMatrix::kMTransY]) && |
| SkScalarNearlyZero(matrix[SkMatrix::kMSkewX]) && |
| SkScalarNearlyZero(matrix[SkMatrix::kMSkewY]) && |
| SkScalarNearlyZero(matrix[SkMatrix::kMPersp0]) && |
| SkScalarNearlyZero(matrix[SkMatrix::kMPersp1]) && |
| SkScalarNearlyZero(matrix[SkMatrix::kMPersp2] - 1.0f); |
| } |
| |
| } // anonymous namespace |
| |
| SoftwareRenderer::SoftwareRenderer(const RendererSettings* settings, |
| OutputSurface* output_surface, |
| ResourceProvider* resource_provider) |
| : DirectRenderer(settings, output_surface, resource_provider), |
| output_device_(output_surface->software_device()) { |
| } |
| |
| SoftwareRenderer::~SoftwareRenderer() {} |
| |
| bool SoftwareRenderer::CanPartialSwap() { |
| return true; |
| } |
| |
| ResourceFormat SoftwareRenderer::BackbufferFormat() const { |
| return resource_provider_->best_texture_format(); |
| } |
| |
| void SoftwareRenderer::BeginDrawingFrame() { |
| TRACE_EVENT0("cc", "SoftwareRenderer::BeginDrawingFrame"); |
| root_canvas_ = output_device_->BeginPaint(current_frame()->root_damage_rect); |
| } |
| |
| void SoftwareRenderer::FinishDrawingFrame() { |
| TRACE_EVENT0("cc", "SoftwareRenderer::FinishDrawingFrame"); |
| current_framebuffer_lock_ = nullptr; |
| current_framebuffer_canvas_.reset(); |
| current_canvas_ = nullptr; |
| root_canvas_ = nullptr; |
| |
| output_device_->EndPaint(); |
| } |
| |
| void SoftwareRenderer::SwapBuffers(std::vector<ui::LatencyInfo> latency_info) { |
| DCHECK(visible_); |
| TRACE_EVENT0("cc", "SoftwareRenderer::SwapBuffers"); |
| OutputSurfaceFrame output_frame; |
| output_frame.latency_info = std::move(latency_info); |
| output_surface_->SwapBuffers(std::move(output_frame)); |
| } |
| |
| bool SoftwareRenderer::FlippedFramebuffer() const { |
| return false; |
| } |
| |
| void SoftwareRenderer::EnsureScissorTestEnabled() { |
| is_scissor_enabled_ = true; |
| SetClipRect(scissor_rect_); |
| } |
| |
| void SoftwareRenderer::EnsureScissorTestDisabled() { |
| // There is no explicit notion of enabling/disabling scissoring in software |
| // rendering, but the underlying effect we want is to clear any existing |
| // clipRect on the current SkCanvas. This is done by setting clipRect to |
| // the viewport's dimensions. |
| if (!current_canvas_) |
| return; |
| is_scissor_enabled_ = false; |
| SkISize size = current_canvas_->getBaseLayerSize(); |
| SetClipRect(gfx::Rect(size.width(), size.height())); |
| } |
| |
| void SoftwareRenderer::BindFramebufferToOutputSurface() { |
| DCHECK(!output_surface_->HasExternalStencilTest()); |
| current_framebuffer_lock_ = nullptr; |
| current_framebuffer_canvas_.reset(); |
| current_canvas_ = root_canvas_; |
| } |
| |
| bool SoftwareRenderer::BindFramebufferToTexture( |
| const ScopedResource* texture) { |
| DCHECK(texture->id()); |
| |
| // Explicitly release lock, otherwise we can crash when try to lock |
| // same texture again. |
| current_framebuffer_lock_ = nullptr; |
| current_framebuffer_lock_ = |
| base::MakeUnique<ResourceProvider::ScopedWriteLockSoftware>( |
| resource_provider_, texture->id()); |
| current_framebuffer_canvas_ = |
| base::MakeUnique<SkCanvas>(current_framebuffer_lock_->sk_bitmap()); |
| current_canvas_ = current_framebuffer_canvas_.get(); |
| return true; |
| } |
| |
| void SoftwareRenderer::SetScissorTestRect(const gfx::Rect& scissor_rect) { |
| is_scissor_enabled_ = true; |
| scissor_rect_ = scissor_rect; |
| SetClipRect(scissor_rect); |
| } |
| |
| void SoftwareRenderer::SetClipRect(const gfx::Rect& rect) { |
| if (!current_canvas_) |
| return; |
| // Skia applies the current matrix to clip rects so we reset it temporary. |
| SkMatrix current_matrix = current_canvas_->getTotalMatrix(); |
| current_canvas_->resetMatrix(); |
| // TODO(fmalita) stop using kReplace (see crbug.com/673851) |
| current_canvas_->clipRect(gfx::RectToSkRect(rect), |
| SkClipOp::kReplace_private_internal_do_not_use); |
| current_canvas_->setMatrix(current_matrix); |
| } |
| |
| void SoftwareRenderer::ClearCanvas(SkColor color) { |
| if (!current_canvas_) |
| return; |
| current_canvas_->clear(color); |
| } |
| |
| void SoftwareRenderer::ClearFramebuffer() { |
| if (current_frame()->current_render_pass->has_transparent_background) { |
| ClearCanvas(SkColorSetARGB(0, 0, 0, 0)); |
| } else { |
| #ifndef NDEBUG |
| // On DEBUG builds, opaque render passes are cleared to blue |
| // to easily see regions that were not drawn on the screen. |
| ClearCanvas(SkColorSetARGB(255, 0, 0, 255)); |
| #endif |
| } |
| } |
| |
| void SoftwareRenderer::PrepareSurfaceForPass( |
| SurfaceInitializationMode initialization_mode, |
| const gfx::Rect& render_pass_scissor) { |
| switch (initialization_mode) { |
| case SURFACE_INITIALIZATION_MODE_PRESERVE: |
| EnsureScissorTestDisabled(); |
| return; |
| case SURFACE_INITIALIZATION_MODE_FULL_SURFACE_CLEAR: |
| EnsureScissorTestDisabled(); |
| ClearFramebuffer(); |
| break; |
| case SURFACE_INITIALIZATION_MODE_SCISSORED_CLEAR: |
| SetScissorTestRect(render_pass_scissor); |
| ClearFramebuffer(); |
| break; |
| } |
| } |
| |
| bool SoftwareRenderer::IsSoftwareResource(ResourceId resource_id) const { |
| switch (resource_provider_->GetResourceType(resource_id)) { |
| case ResourceProvider::RESOURCE_TYPE_GPU_MEMORY_BUFFER: |
| case ResourceProvider::RESOURCE_TYPE_GL_TEXTURE: |
| return false; |
| case ResourceProvider::RESOURCE_TYPE_BITMAP: |
| return true; |
| } |
| |
| LOG(FATAL) << "Invalid resource type."; |
| return false; |
| } |
| |
| void SoftwareRenderer::DoDrawQuad(const DrawQuad* quad, |
| const gfx::QuadF* draw_region) { |
| if (!current_canvas_) |
| return; |
| if (draw_region) { |
| current_canvas_->save(); |
| } |
| |
| TRACE_EVENT0("cc", "SoftwareRenderer::DoDrawQuad"); |
| gfx::Transform quad_rect_matrix; |
| QuadRectTransform(&quad_rect_matrix, |
| quad->shared_quad_state->quad_to_target_transform, |
| gfx::RectF(quad->rect)); |
| gfx::Transform contents_device_transform = |
| current_frame()->window_matrix * current_frame()->projection_matrix * |
| quad_rect_matrix; |
| contents_device_transform.FlattenTo2d(); |
| SkMatrix sk_device_matrix; |
| gfx::TransformToFlattenedSkMatrix(contents_device_transform, |
| &sk_device_matrix); |
| current_canvas_->setMatrix(sk_device_matrix); |
| |
| current_paint_.reset(); |
| if (settings_->force_antialiasing || |
| !IsScaleAndIntegerTranslate(sk_device_matrix)) { |
| // TODO(danakj): Until we can enable AA only on exterior edges of the |
| // layer, disable AA if any interior edges are present. crbug.com/248175 |
| bool all_four_edges_are_exterior = quad->IsTopEdge() && |
| quad->IsLeftEdge() && |
| quad->IsBottomEdge() && |
| quad->IsRightEdge(); |
| if (settings_->allow_antialiasing && |
| (settings_->force_antialiasing || all_four_edges_are_exterior)) |
| current_paint_.setAntiAlias(true); |
| current_paint_.setFilterQuality(kLow_SkFilterQuality); |
| } |
| |
| if (quad->ShouldDrawWithBlending() || |
| quad->shared_quad_state->blend_mode != SkBlendMode::kSrcOver) { |
| current_paint_.setAlpha(quad->shared_quad_state->opacity * 255); |
| current_paint_.setBlendMode(quad->shared_quad_state->blend_mode); |
| } else { |
| current_paint_.setBlendMode(SkBlendMode::kSrc); |
| } |
| |
| if (draw_region) { |
| gfx::QuadF local_draw_region(*draw_region); |
| SkPath draw_region_clip_path; |
| local_draw_region -= |
| gfx::Vector2dF(quad->visible_rect.x(), quad->visible_rect.y()); |
| local_draw_region.Scale(1.0f / quad->visible_rect.width(), |
| 1.0f / quad->visible_rect.height()); |
| local_draw_region -= gfx::Vector2dF(0.5f, 0.5f); |
| |
| SkPoint clip_points[4]; |
| QuadFToSkPoints(local_draw_region, clip_points); |
| draw_region_clip_path.addPoly(clip_points, 4, true); |
| |
| current_canvas_->clipPath(draw_region_clip_path); |
| } |
| |
| switch (quad->material) { |
| case DrawQuad::DEBUG_BORDER: |
| DrawDebugBorderQuad(DebugBorderDrawQuad::MaterialCast(quad)); |
| break; |
| case DrawQuad::PICTURE_CONTENT: |
| DrawPictureQuad(PictureDrawQuad::MaterialCast(quad)); |
| break; |
| case DrawQuad::RENDER_PASS: |
| DrawRenderPassQuad(RenderPassDrawQuad::MaterialCast(quad)); |
| break; |
| case DrawQuad::SOLID_COLOR: |
| DrawSolidColorQuad(SolidColorDrawQuad::MaterialCast(quad)); |
| break; |
| case DrawQuad::TEXTURE_CONTENT: |
| DrawTextureQuad(TextureDrawQuad::MaterialCast(quad)); |
| break; |
| case DrawQuad::TILED_CONTENT: |
| DrawTileQuad(TileDrawQuad::MaterialCast(quad)); |
| break; |
| case DrawQuad::SURFACE_CONTENT: |
| // Surface content should be fully resolved to other quad types before |
| // reaching a direct renderer. |
| NOTREACHED(); |
| break; |
| case DrawQuad::INVALID: |
| case DrawQuad::YUV_VIDEO_CONTENT: |
| case DrawQuad::STREAM_VIDEO_CONTENT: |
| DrawUnsupportedQuad(quad); |
| NOTREACHED(); |
| break; |
| } |
| |
| current_canvas_->resetMatrix(); |
| if (draw_region) { |
| current_canvas_->restore(); |
| } |
| } |
| |
| void SoftwareRenderer::DrawDebugBorderQuad(const DebugBorderDrawQuad* quad) { |
| // We need to apply the matrix manually to have pixel-sized stroke width. |
| SkPoint vertices[4]; |
| gfx::RectFToSkRect(QuadVertexRect()).toQuad(vertices); |
| SkPoint transformed_vertices[4]; |
| current_canvas_->getTotalMatrix().mapPoints(transformed_vertices, |
| vertices, |
| 4); |
| current_canvas_->resetMatrix(); |
| |
| current_paint_.setColor(quad->color); |
| current_paint_.setAlpha(quad->shared_quad_state->opacity * |
| SkColorGetA(quad->color)); |
| current_paint_.setStyle(SkPaint::kStroke_Style); |
| current_paint_.setStrokeWidth(quad->width); |
| current_canvas_->drawPoints(SkCanvas::kPolygon_PointMode, |
| 4, transformed_vertices, current_paint_); |
| } |
| |
| void SoftwareRenderer::DrawPictureQuad(const PictureDrawQuad* quad) { |
| SkMatrix content_matrix; |
| content_matrix.setRectToRect( |
| gfx::RectFToSkRect(quad->tex_coord_rect), |
| gfx::RectFToSkRect(QuadVertexRect()), |
| SkMatrix::kFill_ScaleToFit); |
| current_canvas_->concat(content_matrix); |
| |
| const bool needs_transparency = |
| SkScalarRoundToInt(quad->shared_quad_state->opacity * 255) < 255; |
| const bool disable_image_filtering = |
| disable_picture_quad_image_filtering_ || quad->nearest_neighbor; |
| |
| TRACE_EVENT0("cc", "SoftwareRenderer::DrawPictureQuad"); |
| |
| RasterSource::PlaybackSettings playback_settings; |
| playback_settings.playback_to_shared_canvas = true; |
| // Indicates whether content rasterization should happen through an |
| // ImageHijackCanvas, which causes image decodes to be managed by an |
| // ImageDecodeCache. PictureDrawQuads are used for resourceless software |
| // draws, while a GPU ImageDecodeCache may be in use by the compositor |
| // providing the RasterSource. So we disable the image hijack canvas to avoid |
| // trying to use the GPU ImageDecodeCache while doing a software draw. |
| playback_settings.use_image_hijack_canvas = false; |
| if (needs_transparency || disable_image_filtering) { |
| // TODO(aelias): This isn't correct in all cases. We should detect these |
| // cases and fall back to a persistent bitmap backing |
| // (http://crbug.com/280374). |
| // TODO(vmpstr): Fold this canvas into playback and have raster source |
| // accept a set of settings on playback that will determine which canvas to |
| // apply. (http://crbug.com/594679) |
| skia::OpacityFilterCanvas filtered_canvas(current_canvas_, |
| quad->shared_quad_state->opacity, |
| disable_image_filtering); |
| quad->raster_source->PlaybackToCanvas( |
| &filtered_canvas, quad->content_rect, quad->content_rect, |
| quad->contents_scale, playback_settings); |
| } else { |
| quad->raster_source->PlaybackToCanvas( |
| current_canvas_, quad->content_rect, quad->content_rect, |
| quad->contents_scale, playback_settings); |
| } |
| } |
| |
| void SoftwareRenderer::DrawSolidColorQuad(const SolidColorDrawQuad* quad) { |
| gfx::RectF visible_quad_vertex_rect = MathUtil::ScaleRectProportional( |
| QuadVertexRect(), gfx::RectF(quad->rect), gfx::RectF(quad->visible_rect)); |
| current_paint_.setColor(quad->color); |
| current_paint_.setAlpha(quad->shared_quad_state->opacity * |
| SkColorGetA(quad->color)); |
| current_canvas_->drawRect(gfx::RectFToSkRect(visible_quad_vertex_rect), |
| current_paint_); |
| } |
| |
| void SoftwareRenderer::DrawTextureQuad(const TextureDrawQuad* quad) { |
| if (!IsSoftwareResource(quad->resource_id())) { |
| DrawUnsupportedQuad(quad); |
| return; |
| } |
| |
| // TODO(skaslev): Add support for non-premultiplied alpha. |
| ResourceProvider::ScopedReadLockSkImage lock(resource_provider_, |
| quad->resource_id()); |
| if (!lock.valid()) |
| return; |
| const SkImage* image = lock.sk_image(); |
| gfx::RectF uv_rect = gfx::ScaleRect( |
| gfx::BoundingRect(quad->uv_top_left, quad->uv_bottom_right), |
| image->width(), image->height()); |
| gfx::RectF visible_uv_rect = MathUtil::ScaleRectProportional( |
| uv_rect, gfx::RectF(quad->rect), gfx::RectF(quad->visible_rect)); |
| SkRect sk_uv_rect = gfx::RectFToSkRect(visible_uv_rect); |
| gfx::RectF visible_quad_vertex_rect = MathUtil::ScaleRectProportional( |
| QuadVertexRect(), gfx::RectF(quad->rect), gfx::RectF(quad->visible_rect)); |
| SkRect quad_rect = gfx::RectFToSkRect(visible_quad_vertex_rect); |
| |
| if (quad->y_flipped) |
| current_canvas_->scale(1, -1); |
| |
| bool blend_background = |
| quad->background_color != SK_ColorTRANSPARENT && !image->isOpaque(); |
| bool needs_layer = blend_background && (current_paint_.getAlpha() != 0xFF); |
| if (needs_layer) { |
| current_canvas_->saveLayerAlpha(&quad_rect, current_paint_.getAlpha()); |
| current_paint_.setAlpha(0xFF); |
| } |
| if (blend_background) { |
| SkPaint background_paint; |
| background_paint.setColor(quad->background_color); |
| current_canvas_->drawRect(quad_rect, background_paint); |
| } |
| current_paint_.setFilterQuality( |
| quad->nearest_neighbor ? kNone_SkFilterQuality : kLow_SkFilterQuality); |
| current_canvas_->drawImageRect(image, sk_uv_rect, quad_rect, ¤t_paint_); |
| if (needs_layer) |
| current_canvas_->restore(); |
| } |
| |
| void SoftwareRenderer::DrawTileQuad(const TileDrawQuad* quad) { |
| // |resource_provider_| can be NULL in resourceless software draws, which |
| // should never produce tile quads in the first place. |
| DCHECK(resource_provider_); |
| DCHECK(IsSoftwareResource(quad->resource_id())); |
| |
| ResourceProvider::ScopedReadLockSkImage lock(resource_provider_, |
| quad->resource_id()); |
| if (!lock.valid()) |
| return; |
| |
| gfx::RectF visible_tex_coord_rect = MathUtil::ScaleRectProportional( |
| quad->tex_coord_rect, gfx::RectF(quad->rect), |
| gfx::RectF(quad->visible_rect)); |
| gfx::RectF visible_quad_vertex_rect = MathUtil::ScaleRectProportional( |
| QuadVertexRect(), gfx::RectF(quad->rect), gfx::RectF(quad->visible_rect)); |
| |
| SkRect uv_rect = gfx::RectFToSkRect(visible_tex_coord_rect); |
| current_paint_.setFilterQuality( |
| quad->nearest_neighbor ? kNone_SkFilterQuality : kLow_SkFilterQuality); |
| current_canvas_->drawImageRect(lock.sk_image(), uv_rect, |
| gfx::RectFToSkRect(visible_quad_vertex_rect), |
| ¤t_paint_); |
| } |
| |
| void SoftwareRenderer::DrawRenderPassQuad(const RenderPassDrawQuad* quad) { |
| ScopedResource* content_texture = |
| render_pass_textures_[quad->render_pass_id].get(); |
| DCHECK(content_texture); |
| DCHECK(content_texture->id()); |
| DCHECK(IsSoftwareResource(content_texture->id())); |
| |
| ResourceProvider::ScopedReadLockSoftware lock(resource_provider_, |
| content_texture->id()); |
| if (!lock.valid()) |
| return; |
| |
| SkRect dest_rect = gfx::RectFToSkRect(QuadVertexRect()); |
| SkRect dest_visible_rect = gfx::RectFToSkRect( |
| MathUtil::ScaleRectProportional(QuadVertexRect(), gfx::RectF(quad->rect), |
| gfx::RectF(quad->visible_rect))); |
| // TODO(sunxd): make this never be empty. |
| SkRect content_rect = |
| quad->tex_coord_rect.IsEmpty() |
| ? SkRect::MakeWH(quad->rect.width(), quad->rect.height()) |
| : RectFToSkRect(quad->tex_coord_rect); |
| |
| const SkBitmap* content = lock.sk_bitmap(); |
| |
| sk_sp<SkImage> filter_image; |
| const FilterOperations* filters = FiltersForPass(quad->render_pass_id); |
| if (filters) { |
| DCHECK(!filters->IsEmpty()); |
| sk_sp<SkImageFilter> image_filter = RenderSurfaceFilters::BuildImageFilter( |
| *filters, gfx::SizeF(content_texture->size())); |
| if (image_filter) { |
| SkIRect result_rect; |
| // TODO(ajuma): Apply the filter in the same pass as the content where |
| // possible (e.g. when there's no origin offset). See crbug.com/308201. |
| filter_image = |
| ApplyImageFilter(image_filter.get(), quad, *content, &result_rect); |
| if (result_rect.isEmpty()) { |
| return; |
| } |
| if (filter_image) { |
| gfx::RectF rect = gfx::SkRectToRectF(SkRect::Make(result_rect)); |
| dest_rect = dest_visible_rect = |
| gfx::RectFToSkRect(MathUtil::ScaleRectProportional( |
| QuadVertexRect(), gfx::RectF(quad->rect), rect)); |
| content_rect = |
| SkRect::MakeWH(result_rect.width(), result_rect.height()); |
| } |
| } |
| } |
| |
| SkMatrix content_mat; |
| content_mat.setRectToRect(content_rect, dest_rect, |
| SkMatrix::kFill_ScaleToFit); |
| |
| sk_sp<SkShader> shader; |
| if (!filter_image) { |
| shader = |
| SkShader::MakeBitmapShader(*content, SkShader::kClamp_TileMode, |
| SkShader::kClamp_TileMode, &content_mat); |
| } else { |
| shader = filter_image->makeShader(SkShader::kClamp_TileMode, |
| SkShader::kClamp_TileMode, &content_mat); |
| } |
| |
| std::unique_ptr<ResourceProvider::ScopedReadLockSoftware> mask_lock; |
| if (quad->mask_resource_id()) { |
| mask_lock = std::unique_ptr<ResourceProvider::ScopedReadLockSoftware>( |
| new ResourceProvider::ScopedReadLockSoftware(resource_provider_, |
| quad->mask_resource_id())); |
| |
| if (!mask_lock->valid()) |
| return; |
| |
| const SkBitmap* mask = mask_lock->sk_bitmap(); |
| |
| // Scale normalized uv rect into absolute texel coordinates. |
| SkRect mask_rect = gfx::RectFToSkRect( |
| gfx::ScaleRect(quad->mask_uv_rect, quad->mask_texture_size.width(), |
| quad->mask_texture_size.height())); |
| |
| SkMatrix mask_mat; |
| mask_mat.setRectToRect(mask_rect, dest_rect, SkMatrix::kFill_ScaleToFit); |
| |
| SkPaint mask_paint; |
| mask_paint.setShader( |
| SkShader::MakeBitmapShader(*mask, SkShader::kClamp_TileMode, |
| SkShader::kClamp_TileMode, &mask_mat)); |
| |
| SkLayerRasterizer::Builder builder; |
| builder.addLayer(mask_paint); |
| |
| current_paint_.setRasterizer(builder.detach()); |
| } |
| |
| // If we have a background filter shader, render its results first. |
| sk_sp<SkShader> background_filter_shader = |
| GetBackgroundFilterShader(quad, SkShader::kClamp_TileMode); |
| if (background_filter_shader) { |
| SkPaint paint; |
| paint.setShader(std::move(background_filter_shader)); |
| paint.setRasterizer(current_paint_.refRasterizer()); |
| current_canvas_->drawRect(dest_visible_rect, paint); |
| } |
| current_paint_.setShader(std::move(shader)); |
| current_canvas_->drawRect(dest_visible_rect, current_paint_); |
| } |
| |
| void SoftwareRenderer::DrawUnsupportedQuad(const DrawQuad* quad) { |
| #ifdef NDEBUG |
| current_paint_.setColor(SK_ColorWHITE); |
| #else |
| current_paint_.setColor(SK_ColorMAGENTA); |
| #endif |
| current_paint_.setAlpha(quad->shared_quad_state->opacity * 255); |
| current_canvas_->drawRect(gfx::RectFToSkRect(QuadVertexRect()), |
| current_paint_); |
| } |
| |
| void SoftwareRenderer::CopyCurrentRenderPassToBitmap( |
| std::unique_ptr<CopyOutputRequest> request) { |
| gfx::Rect copy_rect = current_frame()->current_render_pass->output_rect; |
| if (request->has_area()) |
| copy_rect.Intersect(request->area()); |
| gfx::Rect window_copy_rect = MoveFromDrawToWindowSpace(copy_rect); |
| |
| std::unique_ptr<SkBitmap> bitmap(new SkBitmap); |
| bitmap->setInfo(SkImageInfo::MakeN32Premul(window_copy_rect.width(), |
| window_copy_rect.height())); |
| current_canvas_->readPixels( |
| bitmap.get(), window_copy_rect.x(), window_copy_rect.y()); |
| |
| request->SendBitmapResult(std::move(bitmap)); |
| } |
| |
| void SoftwareRenderer::DidChangeVisibility() { |
| if (visible_) |
| output_surface_->EnsureBackbuffer(); |
| else |
| output_surface_->DiscardBackbuffer(); |
| } |
| |
| bool SoftwareRenderer::ShouldApplyBackgroundFilters( |
| const RenderPassDrawQuad* quad, |
| const FilterOperations* background_filters) const { |
| if (!background_filters) |
| return false; |
| DCHECK(!background_filters->IsEmpty()); |
| |
| // TODO(hendrikw): Look into allowing background filters to see pixels from |
| // other render targets. See crbug.com/314867. |
| |
| return true; |
| } |
| |
| // If non-null, auto_bounds will be filled with the automatically-computed |
| // destination bounds. If null, the output will be the same size as the |
| // input bitmap. |
| sk_sp<SkImage> SoftwareRenderer::ApplyImageFilter( |
| SkImageFilter* filter, |
| const RenderPassDrawQuad* quad, |
| const SkBitmap& to_filter, |
| SkIRect* auto_bounds) const { |
| if (!filter) |
| return nullptr; |
| |
| SkMatrix local_matrix; |
| local_matrix.setTranslate(quad->filters_origin.x(), quad->filters_origin.y()); |
| local_matrix.postScale(quad->filters_scale.x(), quad->filters_scale.y()); |
| SkIRect dst_rect; |
| if (auto_bounds) { |
| dst_rect = |
| filter->filterBounds(gfx::RectToSkIRect(quad->rect), local_matrix, |
| SkImageFilter::kForward_MapDirection); |
| *auto_bounds = dst_rect; |
| } else { |
| dst_rect = to_filter.bounds(); |
| } |
| |
| SkImageInfo dst_info = |
| SkImageInfo::MakeN32Premul(dst_rect.width(), dst_rect.height()); |
| sk_sp<SkSurface> surface = SkSurface::MakeRaster(dst_info); |
| |
| if (!surface) { |
| return nullptr; |
| } |
| |
| SkPaint paint; |
| // Treat subnormal float values as zero for performance. |
| ScopedSubnormalFloatDisabler disabler; |
| paint.setImageFilter(filter->makeWithLocalMatrix(local_matrix)); |
| surface->getCanvas()->translate(-dst_rect.x(), -dst_rect.y()); |
| surface->getCanvas()->drawBitmap(to_filter, quad->rect.x(), quad->rect.y(), |
| &paint); |
| |
| return surface->makeImageSnapshot(); |
| } |
| |
| SkBitmap SoftwareRenderer::GetBackdropBitmap( |
| const gfx::Rect& bounding_rect) const { |
| SkBitmap bitmap; |
| bitmap.setInfo(SkImageInfo::MakeN32Premul(bounding_rect.width(), |
| bounding_rect.height())); |
| current_canvas_->readPixels(&bitmap, bounding_rect.x(), bounding_rect.y()); |
| return bitmap; |
| } |
| |
| gfx::Rect SoftwareRenderer::GetBackdropBoundingBoxForRenderPassQuad( |
| const RenderPassDrawQuad* quad, |
| const gfx::Transform& contents_device_transform, |
| const FilterOperations* background_filters, |
| gfx::Rect* unclipped_rect) const { |
| DCHECK(ShouldApplyBackgroundFilters(quad, background_filters)); |
| gfx::Rect backdrop_rect = gfx::ToEnclosingRect( |
| MathUtil::MapClippedRect(contents_device_transform, QuadVertexRect())); |
| |
| SkMatrix matrix; |
| matrix.setScale(quad->filters_scale.x(), quad->filters_scale.y()); |
| backdrop_rect = background_filters->MapRectReverse(backdrop_rect, matrix); |
| |
| *unclipped_rect = backdrop_rect; |
| backdrop_rect.Intersect(MoveFromDrawToWindowSpace( |
| current_frame()->current_render_pass->output_rect)); |
| |
| return backdrop_rect; |
| } |
| |
| sk_sp<SkShader> SoftwareRenderer::GetBackgroundFilterShader( |
| const RenderPassDrawQuad* quad, |
| SkShader::TileMode content_tile_mode) const { |
| const FilterOperations* background_filters = |
| BackgroundFiltersForPass(quad->render_pass_id); |
| if (!ShouldApplyBackgroundFilters(quad, background_filters)) |
| return nullptr; |
| |
| gfx::Transform quad_rect_matrix; |
| QuadRectTransform(&quad_rect_matrix, |
| quad->shared_quad_state->quad_to_target_transform, |
| gfx::RectF(quad->rect)); |
| gfx::Transform contents_device_transform = |
| current_frame()->window_matrix * current_frame()->projection_matrix * |
| quad_rect_matrix; |
| contents_device_transform.FlattenTo2d(); |
| |
| gfx::Rect unclipped_rect; |
| gfx::Rect backdrop_rect = GetBackdropBoundingBoxForRenderPassQuad( |
| quad, contents_device_transform, background_filters, &unclipped_rect); |
| |
| // Figure out the transformations to move it back to pixel space. |
| gfx::Transform contents_device_transform_inverse; |
| if (!contents_device_transform.GetInverse(&contents_device_transform_inverse)) |
| return nullptr; |
| |
| SkMatrix filter_backdrop_transform = |
| contents_device_transform_inverse.matrix(); |
| filter_backdrop_transform.preTranslate(backdrop_rect.x(), backdrop_rect.y()); |
| |
| // Draw what's behind, and apply the filter to it. |
| SkBitmap backdrop_bitmap = GetBackdropBitmap(backdrop_rect); |
| |
| gfx::Vector2dF clipping_offset = |
| (unclipped_rect.top_right() - backdrop_rect.top_right()) + |
| (backdrop_rect.bottom_left() - unclipped_rect.bottom_left()); |
| sk_sp<SkImageFilter> filter = RenderSurfaceFilters::BuildImageFilter( |
| *background_filters, |
| gfx::SizeF(backdrop_bitmap.width(), backdrop_bitmap.height()), |
| clipping_offset); |
| sk_sp<SkImage> filter_backdrop_image = |
| ApplyImageFilter(filter.get(), quad, backdrop_bitmap, nullptr); |
| |
| if (!filter_backdrop_image) |
| return nullptr; |
| |
| return filter_backdrop_image->makeShader(content_tile_mode, content_tile_mode, |
| &filter_backdrop_transform); |
| } |
| |
| } // namespace cc |