1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef ANDROID_MULTITOUCH_SCREEN_H_ 18 #define ANDROID_MULTITOUCH_SCREEN_H_ 19 20 #include "android/multitouch-port.h" 21 22 /* 23 * Encapsulates functionality of multi-touch screen. Main task of this component 24 * is to report touch events to the emulated system via event device (see 25 * hw/goldfish_events_device.c) The source of touch events can be a mouse, or an 26 * actual android device that is used for multi-touch emulation. Note that since 27 * we need to simultaneousely support a mouse and a device as event source, we 28 * need to know which one has sent us a touch event. This is important for proper 29 * tracking of pointer IDs when multitouch is in play. 30 */ 31 32 /* Defines a source of multi-touch event. This is used to properly track 33 * pointer IDs. 34 */ 35 typedef enum MTESource { 36 /* The event is associated with a mouse. */ 37 MTES_MOUSE, 38 /* The event is associated with an actual android device. */ 39 MTES_DEVICE, 40 } MTESource; 41 42 /* Initializes MTSState instance. 43 * Param: 44 * mtsp - Instance of the multi-touch port connected to the device. 45 */ 46 extern void multitouch_init(AndroidMTSPort* mtsp); 47 48 /* Handles a MT pointer event. 49 * Param: 50 * source - Identifies the source of the event (mouse or a device). 51 * tracking_id - Tracking ID of the pointer. 52 * x, y - Pointer coordinates, 53 * pressure - Pressure value for the pointer. 54 */ 55 extern void multitouch_update_pointer(MTESource source, 56 int tracking_id, 57 int x, 58 int y, 59 int pressure); 60 61 /* Gets maximum slot index available for the multi-touch emulation. */ 62 extern int multitouch_get_max_slot(); 63 64 /* Saves screen size reported by the device that emulates multi-touch. */ 65 extern void multitouch_set_device_screen_size(int width, int height); 66 67 /* A callback set to monitor OpenGLES framebuffer updates. 68 * This callback is called by the renderer just before each new frame is 69 * displayed, providing a copy of the framebuffer contents. 70 * The callback will be called from one of the renderer's threads, so it may 71 * require synchronization on any data structures it modifies. The pixels buffer 72 * may be overwritten as soon as the callback returns. 73 * The pixels buffer is intentionally not const: the callback may modify the data 74 * without copying to another buffer if it wants, e.g. in-place RGBA to RGB 75 * conversion, or in-place y-inversion. 76 * Param: 77 * context The pointer optionally provided when the callback was 78 * registered. The client can use this to pass whatever 79 * information it wants to the callback. 80 * width, height Dimensions of the image, in pixels. Rows are tightly packed; 81 * there is no inter-row padding. 82 * ydir Indicates row order: 1 means top-to-bottom order, -1 means 83 * bottom-to-top order. 84 * format, type Format and type GL enums, as used in glTexImage2D() or 85 * glReadPixels(), describing the pixel format. 86 * pixels The framebuffer image. 87 * 88 * In the first implementation, ydir is always -1 (bottom to top), format and 89 * type are always GL_RGBA and GL_UNSIGNED_BYTE, and the width and height will 90 * always be the same as the ones passed to initOpenGLRenderer(). 91 */ 92 extern void multitouch_opengles_fb_update(void* context, 93 int width, 94 int height, 95 int ydir, 96 int format, 97 int type, 98 unsigned char* pixels); 99 100 #endif /* ANDROID_MULTITOUCH_SCREEN_H_ */ 101
