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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_MULTITOUCH_SCREEN_H_
#define ANDROID_MULTITOUCH_SCREEN_H_
#include "android/sdk-controller-socket.h"
#include "android/multitouch-port.h"
/*
* Encapsulates functionality of multi-touch screen. Main task of this component
* is to report touch events to the emulated system via event device (see
* hw/goldfish_events_device.c) The source of touch events can be a mouse, or an
* actual android device that is used for multi-touch emulation. Note that since
* we need to simultaneousely support a mouse and a device as event source, we
* need to know which one has sent us a touch event. This is important for proper
* tracking of pointer IDs when multitouch is in play.
*/
/* Defines a source of multi-touch event. This is used to properly track
* pointer IDs.
*/
typedef enum MTESource {
/* The event is associated with a mouse. */
MTES_MOUSE,
/* The event is associated with an actual android device. */
MTES_DEVICE,
} MTESource;
/* Initializes MTSState instance.
* Param:
* mtsp - Instance of the multi-touch port connected to the device.
*/
extern void multitouch_init(AndroidMTSPort* mtsp);
/* Handles a MT pointer event.
* Param:
* source - Identifies the source of the event (mouse or a device).
* tracking_id - Tracking ID of the pointer.
* x, y - Pointer coordinates,
* pressure - Pressure value for the pointer.
*/
extern void multitouch_update_pointer(MTESource source,
int tracking_id,
int x,
int y,
int pressure);
/* Gets maximum slot index available for the multi-touch emulation. */
extern int multitouch_get_max_slot();
/* A callback set to monitor OpenGLES framebuffer updates.
* This callback is called by the renderer just before each new frame is
* displayed, providing a copy of the framebuffer contents.
* The callback will be called from one of the renderer's threads, so it may
* require synchronization on any data structures it modifies. The pixels buffer
* may be overwritten as soon as the callback returns.
* The pixels buffer is intentionally not const: the callback may modify the data
* without copying to another buffer if it wants, e.g. in-place RGBA to RGB
* conversion, or in-place y-inversion.
* Param:
* context The pointer optionally provided when the callback was
* registered. The client can use this to pass whatever
* information it wants to the callback.
* width, height Dimensions of the image, in pixels. Rows are tightly packed;
* there is no inter-row padding.
* ydir Indicates row order: 1 means top-to-bottom order, -1 means
* bottom-to-top order.
* format, type Format and type GL enums, as used in glTexImage2D() or
* glReadPixels(), describing the pixel format.
* pixels The framebuffer image.
*
* In the first implementation, ydir is always -1 (bottom to top), format and
* type are always GL_RGBA and GL_UNSIGNED_BYTE, and the width and height will
* always be the same as the ones passed to initOpenGLRenderer().
*/
extern void multitouch_opengles_fb_update(void* context,
int width,
int height,
int ydir,
int format,
int type,
unsigned char* pixels);
/* Pushes the entire framebuffer to the device. This will force the device to
* refresh the entire screen.
*/
extern void multitouch_refresh_screen(void);
/* Framebuffer update has been handled by the device. */
extern void multitouch_fb_updated(void);
#endif /* ANDROID_MULTITOUCH_SCREEN_H_ */
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