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Use the rasterizer's compositor context and texture registry to capture screenshots (flutter/engine#5180)

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Fixes https://github.com/flutter/flutter/issues/16412
This commit is contained in:
Jason Simmons
2018-05-04 16:07:10 -07:00
committed by GitHub
parent 92e3517650
commit dff05ac16e
1 changed files with 14 additions and 9 deletions
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23
engine/src/flutter/shell/common/rasterizer.cc
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@@ -126,13 +126,14 @@ bool Rasterizer::DrawToSurface(flow::LayerTree& layer_tree) {
return false;
}
static sk_sp<SkPicture> ScreenshotLayerTreeAsPicture(flow::LayerTree* tree) {
static sk_sp<SkPicture> ScreenshotLayerTreeAsPicture(
flow::LayerTree* tree,
flow::CompositorContext& compositor_context) {
FXL_DCHECK(tree != nullptr);
SkPictureRecorder recorder;
recorder.beginRecording(
SkRect::MakeWH(tree->frame_size().width(), tree->frame_size().height()));
flow::CompositorContext compositor_context;
auto frame = compositor_context.AcquireFrame(
nullptr, recorder.getRecordingCanvas(), false);
@@ -158,9 +159,11 @@ static sk_sp<SkSurface> CreateSnapshotSurface(GrContext* surface_context,
return SkSurface::MakeRaster(image_info);
}
static sk_sp<SkData> ScreenshotLayerTreeAsImage(flow::LayerTree* tree,
GrContext* surface_context,
bool compressed) {
static sk_sp<SkData> ScreenshotLayerTreeAsImage(
flow::LayerTree* tree,
flow::CompositorContext& compositor_context,
GrContext* surface_context,
bool compressed) {
// Attempt to create a snapshot surface depending on whether we have access to
// a valid GPU rendering context.
auto snapshot_surface =
@@ -170,7 +173,6 @@ static sk_sp<SkData> ScreenshotLayerTreeAsImage(flow::LayerTree* tree,
}
// Draw the current layer tree into the snapshot surface.
flow::CompositorContext compositor_context;
auto canvas = snapshot_surface->getCanvas();
auto frame = compositor_context.AcquireFrame(surface_context, canvas, false);
canvas->clear(SK_ColorBLACK);
@@ -219,13 +221,16 @@ Rasterizer::Screenshot Rasterizer::ScreenshotLastLayerTree(
switch (type) {
case ScreenshotType::SkiaPicture:
data = ScreenshotLayerTreeAsPicture(layer_tree)->serialize();
data = ScreenshotLayerTreeAsPicture(layer_tree, *compositor_context_)
->serialize();
break;
case ScreenshotType::UncompressedImage:
data = ScreenshotLayerTreeAsImage(layer_tree, surface_context, false);
data = ScreenshotLayerTreeAsImage(layer_tree, *compositor_context_,
surface_context, false);
break;
case ScreenshotType::CompressedImage:
data = ScreenshotLayerTreeAsImage(layer_tree, surface_context, true);
data = ScreenshotLayerTreeAsImage(layer_tree, *compositor_context_,
surface_context, true);
break;
}