1 /* 2 * Copyright (C) 2007 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 _MINUI_H_ 18 #define _MINUI_H_ 19 20 #include <sys/types.h> 21 22 #include <functional> 23 24 // 25 // Graphics. 26 // 27 28 struct GRSurface { 29 int width; 30 int height; 31 int row_bytes; 32 int pixel_bytes; 33 unsigned char* data; 34 }; 35 36 int gr_init(); 37 void gr_exit(); 38 39 int gr_fb_width(); 40 int gr_fb_height(); 41 42 void gr_flip(); 43 void gr_fb_blank(bool blank); 44 45 void gr_clear(); // clear entire surface to current color 46 void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a); 47 void gr_fill(int x1, int y1, int x2, int y2); 48 void gr_text(int x, int y, const char *s, bool bold); 49 void gr_texticon(int x, int y, GRSurface* icon); 50 int gr_measure(const char *s); 51 void gr_font_size(int *x, int *y); 52 53 void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy); 54 unsigned int gr_get_width(GRSurface* surface); 55 unsigned int gr_get_height(GRSurface* surface); 56 57 // 58 // Input events. 59 // 60 61 struct input_event; 62 63 // TODO: move these over to std::function. 64 typedef int (*ev_callback)(int fd, uint32_t epevents, void* data); 65 typedef int (*ev_set_key_callback)(int code, int value, void* data); 66 67 int ev_init(ev_callback input_cb, void* data); 68 void ev_exit(); 69 int ev_add_fd(int fd, ev_callback cb, void* data); 70 void ev_iterate_available_keys(std::function<void(int)> f); 71 int ev_sync_key_state(ev_set_key_callback set_key_cb, void* data); 72 73 // 'timeout' has the same semantics as poll(2). 74 // 0 : don't block 75 // < 0 : block forever 76 // > 0 : block for 'timeout' milliseconds 77 int ev_wait(int timeout); 78 79 int ev_get_input(int fd, uint32_t epevents, input_event* ev); 80 void ev_dispatch(); 81 int ev_get_epollfd(); 82 83 // 84 // Resources 85 // 86 87 // res_create_*_surface() functions return 0 if no error, else 88 // negative. 89 // 90 // A "display" surface is one that is intended to be drawn to the 91 // screen with gr_blit(). An "alpha" surface is a grayscale image 92 // interpreted as an alpha mask used to render text in the current 93 // color (with gr_text() or gr_texticon()). 94 // 95 // All these functions load PNG images from "/res/images/${name}.png". 96 97 // Load a single display surface from a PNG image. 98 int res_create_display_surface(const char* name, GRSurface** pSurface); 99 100 // Load an array of display surfaces from a single PNG image. The PNG 101 // should have a 'Frames' text chunk whose value is the number of 102 // frames this image represents. The pixel data itself is interlaced 103 // by row. 104 int res_create_multi_display_surface(const char* name, 105 int* frames, GRSurface*** pSurface); 106 107 // Load a single alpha surface from a grayscale PNG image. 108 int res_create_alpha_surface(const char* name, GRSurface** pSurface); 109 110 // Load part of a grayscale PNG image that is the first match for the 111 // given locale. The image is expected to be a composite of multiple 112 // translations of the same text, with special added rows that encode 113 // the subimages' size and intended locale in the pixel data. See 114 // development/tools/recovery_l10n for an app that will generate these 115 // specialized images from Android resources. 116 int res_create_localized_alpha_surface(const char* name, const char* locale, 117 GRSurface** pSurface); 118 119 // Free a surface allocated by any of the res_create_*_surface() 120 // functions. 121 void res_free_surface(GRSurface* surface); 122 123 #endif 124
