// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_RENDERER_PEPPER_PEPPER_GRAPHICS_2D_HOST_H_
#define CONTENT_RENDERER_PEPPER_PEPPER_GRAPHICS_2D_HOST_H_
#include <stdint.h>
#include <vector>
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "cc/paint/paint_canvas.h"
#include "cc/resources/shared_bitmap_id_registrar.h"
#include "components/viz/common/resources/release_callback.h"
#include "content/common/content_export.h"
#include "gpu/command_buffer/common/mailbox.h"
#include "gpu/command_buffer/common/sync_token.h"
#include "ppapi/c/ppb_graphics_2d.h"
#include "ppapi/host/host_message_context.h"
#include "ppapi/host/resource_host.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/geometry/point_f.h"
#include "ui/gfx/geometry/size.h"
namespace cc {
class CrossThreadSharedBitmap;
}
namespace gfx {
class Rect;
}
namespace gpu {
class ClientSharedImage;
}
namespace viz {
class RasterContextProvider;
struct TransferableResource;
}
namespace content {
class PepperPluginInstanceImpl;
class PPB_ImageData_Impl;
class RendererPpapiHost;
class CONTENT_EXPORT PepperGraphics2DHost final
: public ppapi::host::ResourceHost {
public:
static PepperGraphics2DHost* Create(
RendererPpapiHost* host,
PP_Instance instance,
PP_Resource resource,
const PP_Size& size,
PP_Bool is_always_opaque,
scoped_refptr<PPB_ImageData_Impl> backing_store);
PepperGraphics2DHost(const PepperGraphics2DHost&) = delete;
PepperGraphics2DHost& operator=(const PepperGraphics2DHost&) = delete;
~PepperGraphics2DHost() override;
// ppapi::host::ResourceHost override.
int32_t OnResourceMessageReceived(
const IPC::Message& msg,
ppapi::host::HostMessageContext* context) override;
bool IsGraphics2DHost() override;
bool ReadImageData(PP_Resource image, const PP_Point* top_left);
// Assciates this device with the given plugin instance. You can pass NULL
// to clear the existing device. Returns true on success. In this case, a
// repaint of the page will also be scheduled. Failure means that the device
// is already bound to a different instance, and nothing will happen.
bool BindToInstance(PepperPluginInstanceImpl* new_instance);
// Paints the current backing store to the web page.
void Paint(cc::PaintCanvas* canvas,
const gfx::Rect& plugin_rect,
const gfx::Rect& paint_rect);
bool PrepareTransferableResource(
cc::SharedBitmapIdRegistrar* bitmap_registrar,
viz::TransferableResource* transferable_resource,
viz::ReleaseCallback* release_callback);
void AttachedToNewLayer();
// Notifications about the view's progress painting. See PluginInstance.
// These messages are used to send Flush callbacks to the plugin.
void ViewInitiatedPaint();
float GetScale() const;
void SetLayerTransform(float scale, const PP_Point& transform);
bool IsAlwaysOpaque() const;
gfx::Size Size() const;
void ClearCache();
void set_viewport_to_dip_scale(float viewport_to_dip_scale) {
DCHECK_LT(0, viewport_to_dip_scale_);
viewport_to_dip_scale_ = viewport_to_dip_scale;
}
private:
PepperGraphics2DHost(RendererPpapiHost* host,
PP_Instance instance,
PP_Resource resource);
bool Init(int width,
int height,
bool is_always_opaque,
scoped_refptr<PPB_ImageData_Impl> backing_store);
int32_t OnHostMsgPaintImageData(ppapi::host::HostMessageContext* context,
const ppapi::HostResource& image_data,
const PP_Point& top_left,
bool src_rect_specified,
const PP_Rect& src_rect);
int32_t OnHostMsgScroll(ppapi::host::HostMessageContext* context,
bool clip_specified,
const PP_Rect& clip,
const PP_Point& amount);
int32_t OnHostMsgReplaceContents(ppapi::host::HostMessageContext* context,
const ppapi::HostResource& image_data);
int32_t OnHostMsgFlush(ppapi::host::HostMessageContext* context);
int32_t OnHostMsgSetScale(ppapi::host::HostMessageContext* context,
float scale);
int32_t OnHostMsgSetLayerTransform(ppapi::host::HostMessageContext* context,
float Scale,
const PP_FloatPoint& Transform);
int32_t OnHostMsgReadImageData(ppapi::host::HostMessageContext* context,
PP_Resource image,
const PP_Point& top_left);
// If |old_image_data| is not NULL, a previous used ImageData object will be
// reused. This is used by ReplaceContents.
int32_t Flush(PP_Resource* old_image_data);
// Called internally to execute the different queued commands. The
// parameters to these functions will have already been validated. The last
// rect argument will be filled by each function with the area affected by
// the update that requires invalidation. If there were no pixels changed,
// this rect can be untouched.
void ExecuteTransform(const float& scale,
const gfx::PointF& translate,
gfx::Rect* invalidated_rect);
void ExecutePaintImageData(PPB_ImageData_Impl* image,
int x,
int y,
const gfx::Rect& src_rect,
gfx::Rect* invalidated_rect);
void ExecuteScroll(const gfx::Rect& clip,
int dx,
int dy,
gfx::Rect* invalidated_rect);
void ExecuteReplaceContents(PPB_ImageData_Impl* image,
gfx::Rect* invalidated_rect,
PP_Resource* old_image_data);
void SendFlushAck();
// Function scheduled to execute by ScheduleOffscreenFlushAck that actually
// issues the offscreen callbacks.
void SendOffscreenFlushAck();
// Schedules the offscreen flush ACK at a future time.
void ScheduleOffscreenFlushAck();
// Returns true if there is any type of flush callback pending.
bool HasPendingFlush() const;
// Scale |op_rect| to logical pixels, taking care to include partially-
// covered logical pixels (aka DIPs). Also scale optional |delta| to logical
// pixels as well for scrolling cases. Returns false for scrolling cases where
// scaling either |op_rect| or |delta| would require scrolling to fall back to
// invalidation due to rounding errors, true otherwise.
static bool ConvertToLogicalPixels(float scale,
gfx::Rect* op_rect,
gfx::Point* delta);
// Callback when compositor is done with a software resource given to it.
void ReleaseSoftwareCallback(
scoped_refptr<cc::CrossThreadSharedBitmap> bitmap,
cc::SharedBitmapIdRegistration registration,
const gpu::SyncToken& sync_token,
bool lost_resource);
// Callback when compositor is done with a gpu resource given to it. Static
// for speed. Just kidding, it's so this can clean up the texture if the host
// has been destroyed.
static void ReleaseTextureCallback(
base::WeakPtr<PepperGraphics2DHost> host,
scoped_refptr<viz::RasterContextProvider> context,
const gfx::Size& size,
scoped_refptr<gpu::ClientSharedImage> shared_image,
const gpu::SyncToken& sync_token,
bool lost);
raw_ptr<RendererPpapiHost> renderer_ppapi_host_;
scoped_refptr<PPB_ImageData_Impl> image_data_;
// Non-owning pointer to the plugin instance this context is currently bound
// to, if any. If the context is currently unbound, this will be NULL.
raw_ptr<PepperPluginInstanceImpl> bound_instance_;
// Keeps track of all drawing commands queued before a Flush call.
struct QueuedOperation;
typedef std::vector<QueuedOperation> OperationQueue;
OperationQueue queued_operations_;
// True if we need to send an ACK to plugin.
bool need_flush_ack_;
// When doing offscreen flushes, we issue a task that issues the callback
// later. This is set when one of those tasks is pending so that we can
// enforce the "only one pending flush at a time" constraint in the API.
bool offscreen_flush_pending_;
// Set to true if the plugin declares that this device will always be opaque.
// This allows us to do more optimized painting in some cases.
bool is_always_opaque_;
// Set to the scale between what the plugin considers to be one pixel and one
// DIP
float scale_;
// The scale between the viewport and dip.
float viewport_to_dip_scale_ = 1.0f;
ppapi::host::ReplyMessageContext flush_reply_context_;
bool is_running_in_process_;
bool composited_output_modified_ = true;
// Local cache of the compositing mode. This is sticky, once true it stays
// that way.
bool is_gpu_compositing_disabled_ = false;
// The shared main thread context provider, used to upload 2d pepper frames
// if the compositor is expecting gpu content.
scoped_refptr<viz::RasterContextProvider> main_thread_context_;
struct SharedImageInfo {
SharedImageInfo(gpu::SyncToken sync_token,
scoped_refptr<gpu::ClientSharedImage> shared_image,
gfx::Size size);
SharedImageInfo(const SharedImageInfo& shared_image_info);
~SharedImageInfo();
gpu::SyncToken sync_token;
scoped_refptr<gpu::ClientSharedImage> shared_image;
gfx::Size size;
};
// Shared images that are available for recycling.
std::vector<SharedImageInfo> recycled_shared_images_;
// This is a bitmap that was recently released by the compositor and may be
// used to transfer bytes to the compositor again, along with the registration
// of the SharedBitmapId that is kept alive as long as the bitmap is, in order
// to give the bitmap to the compositor.
scoped_refptr<cc::CrossThreadSharedBitmap> cached_bitmap_;
cc::SharedBitmapIdRegistration cached_bitmap_registration_;
// Whether to use gpu memory for compositor resources.
const bool enable_gpu_memory_buffer_;
base::WeakPtrFactory<PepperGraphics2DHost> weak_ptr_factory_{this};
friend class PepperGraphics2DHostTest;
};
} // namespace content
#endif // CONTENT_RENDERER_PEPPER_PEPPER_GRAPHICS_2D_HOST_H_
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