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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef FLUTTER_SHELL_PLATFORM_LINUX_FL_RENDERER_H_
#define FLUTTER_SHELL_PLATFORM_LINUX_FL_RENDERER_H_
#include <gtk/gtk.h>
#include "flutter/shell/platform/linux/public/flutter_linux/fl_dart_project.h"
#include "flutter/shell/platform/linux/public/flutter_linux/fl_view.h"
#include "flutter/shell/platform/embedder/embedder.h"
G_BEGIN_DECLS
/**
* FlRendererError:
* Errors for #FlRenderer objects to set on failures.
*/
typedef enum {
FL_RENDERER_ERROR_FAILED,
} FlRendererError;
GQuark fl_renderer_error_quark(void) G_GNUC_CONST;
G_DECLARE_DERIVABLE_TYPE(FlRenderer, fl_renderer, FL, RENDERER, GObject)
/**
* FlRenderer:
*
* #FlRenderer is an abstract class that allows Flutter to draw pixels.
*/
struct _FlRendererClass {
GObjectClass parent_class;
/**
* Virtual method called when Flutter needs #GdkGLContext to render.
* @renderer: an #FlRenderer.
* @widget: the widget being rendered on.
* @visible: (out): the GL context for visible surface.
* @resource: (out): the GL context for resource loading.
* @error: (allow-none): #GError location to store the error occurring, or
* %NULL to ignore.
*
* Returns: %TRUE if both contexts were created, %FALSE if there was an error.
*/
gboolean (*create_contexts)(FlRenderer* renderer,
GtkWidget* widget,
GdkGLContext** visible,
GdkGLContext** resource,
GError** error);
/**
* Virtual method called when Flutter needs OpenGL proc address.
* @renderer: an #FlRenderer.
* @name: proc name.
*
* Returns: OpenGL proc address.
*/
void* (*get_proc_address)();
/**
* Virtual method called when Flutter needs a backing store for a specific
* #FlutterLayer.
* @renderer: an #FlRenderer.
* @config: backing store config.
* @backing_store_out: saves created backing store.
*
* Returns %TRUE if successful.
*/
gboolean (*create_backing_store)(FlRenderer* renderer,
const FlutterBackingStoreConfig* config,
FlutterBackingStore* backing_store_out);
/**
* Virtual method called when Flutter wants to release the backing store.
* @renderer: an #FlRenderer.
* @backing_store: backing store to be released.
*
* Returns %TRUE if successful.
*/
gboolean (*collect_backing_store)(FlRenderer* renderer,
const FlutterBackingStore* backing_store);
/**
* Virtual method called when Flutter wants to composite layers onto the
* screen.
* @renderer: an #FlRenderer.
* @layers: layers to be composited.
* @layers_count: number of layers.
*
* Returns %TRUE if successful.
*/
gboolean (*present_layers)(FlRenderer* renderer,
const FlutterLayer** layers,
size_t layers_count);
};
/**
* fl_renderer_start:
* @renderer: an #FlRenderer.
* @view: the view Flutter is renderering to.
* @error: (allow-none): #GError location to store the error occurring, or %NULL
* to ignore.
*
* Start the renderer.
*
* Returns: %TRUE if successfully started.
*/
gboolean fl_renderer_start(FlRenderer* renderer, FlView* view, GError** error);
/**
* fl_renderer_get_view:
* @renderer: an #FlRenderer.
*
* Returns: targeted #FlView or %NULL if headless.
*/
FlView* fl_renderer_get_view(FlRenderer* renderer);
/**
* fl_renderer_get_context:
* @renderer: an #FlRenderer.
*
* Returns: GL context for GLAreas or %NULL if headless.
*/
GdkGLContext* fl_renderer_get_context(FlRenderer* renderer);
/**
* fl_renderer_get_proc_address:
* @renderer: an #FlRenderer.
* @name: a function name.
*
* Gets the rendering API function that matches the given name.
*
* Returns: a function pointer.
*/
void* fl_renderer_get_proc_address(FlRenderer* renderer, const char* name);
/**
* fl_renderer_make_current:
* @renderer: an #FlRenderer.
* @error: (allow-none): #GError location to store the error occurring, or %NULL
* to ignore.
*
* Makes the rendering context current.
*
* Returns %TRUE if successful.
*/
gboolean fl_renderer_make_current(FlRenderer* renderer, GError** error);
/**
* fl_renderer_make_resource_current:
* @renderer: an #FlRenderer.
* @error: (allow-none): #GError location to store the error occurring, or %NULL
* to ignore.
*
* Makes the resource rendering context current.
*
* Returns %TRUE if successful.
*/
gboolean fl_renderer_make_resource_current(FlRenderer* renderer,
GError** error);
/**
* fl_renderer_clear_current:
* @renderer: an #FlRenderer.
* @error: (allow-none): #GError location to store the error occurring, or %NULL
* to ignore.
*
* Clears the current rendering context.
*
* Returns %TRUE if successful.
*/
gboolean fl_renderer_clear_current(FlRenderer* renderer, GError** error);
/**
* fl_renderer_get_fbo:
* @renderer: an #FlRenderer.
*
* Gets the frame buffer object to render to.
*
* Returns: a frame buffer object index.
*/
guint32 fl_renderer_get_fbo(FlRenderer* renderer);
/**
* fl_renderer_create_backing_store:
* @renderer: an #FlRenderer.
* @config: backing store config.
* @backing_store_out: saves created backing store.
*
* Obtain a backing store for a specific #FlutterLayer.
*
* Returns %TRUE if successful.
*/
gboolean fl_renderer_create_backing_store(
FlRenderer* renderer,
const FlutterBackingStoreConfig* config,
FlutterBackingStore* backing_store_out);
/**
* fl_renderer_collect_backing_store:
* @renderer: an #FlRenderer.
* @backing_store: backing store to be released.
*
* A callback invoked by the engine to release the backing store. The
* embedder may collect any resources associated with the backing store.
*
* Returns %TRUE if successful.
*/
gboolean fl_renderer_collect_backing_store(
FlRenderer* renderer,
const FlutterBackingStore* backing_store);
/**
* fl_renderer_present_layers:
* @renderer: an #FlRenderer.
* @layers: layers to be composited.
* @layers_count: number of layers.
*
* Callback invoked by the engine to composite the contents of each layer
* onto the screen.
*
* Returns %TRUE if successful.
*/
gboolean fl_renderer_present_layers(FlRenderer* renderer,
const FlutterLayer** layers,
size_t layers_count);
/**
* fl_renderer_wait_for_frame:
* @renderer: an #FlRenderer.
* @target_width: width of frame being waited for
* @target_height: height of frame being waited for
*
* Holds the thread until frame with requested dimensions is presented.
* While waiting for frame Flutter platform and raster tasks are being
* processed.
*/
void fl_renderer_wait_for_frame(FlRenderer* renderer,
int target_width,
int target_height);
G_END_DECLS
#endif // FLUTTER_SHELL_PLATFORM_LINUX_FL_RENDERER_H_