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 #include <string> 24 #include <vector> 25 26 // 27 // Graphics. 28 // 29 30 struct GRSurface { 31 int width; 32 int height; 33 int row_bytes; 34 int pixel_bytes; 35 unsigned char* data; 36 }; 37 38 struct GRFont { 39 GRSurface* texture; 40 int char_width; 41 int char_height; 42 }; 43 44 enum GRRotation { 45 ROTATION_NONE = 0, 46 ROTATION_RIGHT = 1, 47 ROTATION_DOWN = 2, 48 ROTATION_LEFT = 3, 49 }; 50 51 int gr_init(); 52 void gr_exit(); 53 54 int gr_fb_width(); 55 int gr_fb_height(); 56 57 void gr_flip(); 58 void gr_fb_blank(bool blank); 59 60 void gr_clear(); // clear entire surface to current color 61 void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a); 62 void gr_fill(int x1, int y1, int x2, int y2); 63 64 void gr_texticon(int x, int y, GRSurface* icon); 65 66 const GRFont* gr_sys_font(); 67 int gr_init_font(const char* name, GRFont** dest); 68 void gr_text(const GRFont* font, int x, int y, const char* s, bool bold); 69 int gr_measure(const GRFont* font, const char* s); 70 void gr_font_size(const GRFont* font, int* x, int* y); 71 72 void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy); 73 unsigned int gr_get_width(GRSurface* surface); 74 unsigned int gr_get_height(GRSurface* surface); 75 76 // Set rotation, flips gr_fb_width/height if 90 degree rotation difference 77 void gr_rotate(GRRotation rotation); 78 79 // 80 // Input events. 81 // 82 83 struct input_event; 84 85 using ev_callback = std::function<int(int fd, uint32_t epevents)>; 86 using ev_set_key_callback = std::function<int(int code, int value)>; 87 88 int ev_init(ev_callback input_cb, bool allow_touch_inputs = false); 89 void ev_exit(); 90 int ev_add_fd(int fd, ev_callback cb); 91 void ev_iterate_available_keys(const std::function<void(int)>& f); 92 void ev_iterate_touch_inputs(const std::function<void(int)>& action); 93 int ev_sync_key_state(const ev_set_key_callback& set_key_cb); 94 95 // 'timeout' has the same semantics as poll(2). 96 // 0 : don't block 97 // < 0 : block forever 98 // > 0 : block for 'timeout' milliseconds 99 int ev_wait(int timeout); 100 101 int ev_get_input(int fd, uint32_t epevents, input_event* ev); 102 void ev_dispatch(); 103 int ev_get_epollfd(); 104 105 // 106 // Resources 107 // 108 109 bool matches_locale(const std::string& prefix, const std::string& locale); 110 111 // res_create_*_surface() functions return 0 if no error, else 112 // negative. 113 // 114 // A "display" surface is one that is intended to be drawn to the 115 // screen with gr_blit(). An "alpha" surface is a grayscale image 116 // interpreted as an alpha mask used to render text in the current 117 // color (with gr_text() or gr_texticon()). 118 // 119 // All these functions load PNG images from "/res/images/${name}.png". 120 121 // Load a single display surface from a PNG image. 122 int res_create_display_surface(const char* name, GRSurface** pSurface); 123 124 // Load an array of display surfaces from a single PNG image. The PNG 125 // should have a 'Frames' text chunk whose value is the number of 126 // frames this image represents. The pixel data itself is interlaced 127 // by row. 128 int res_create_multi_display_surface(const char* name, int* frames, int* fps, 129 GRSurface*** pSurface); 130 131 // Load a single alpha surface from a grayscale PNG image. 132 int res_create_alpha_surface(const char* name, GRSurface** pSurface); 133 134 // Load part of a grayscale PNG image that is the first match for the 135 // given locale. The image is expected to be a composite of multiple 136 // translations of the same text, with special added rows that encode 137 // the subimages' size and intended locale in the pixel data. See 138 // bootable/recovery/tools/recovery_l10n for an app that will generate 139 // these specialized images from Android resources. 140 int res_create_localized_alpha_surface(const char* name, const char* locale, 141 GRSurface** pSurface); 142 143 // Return a list of locale strings embedded in |png_name|. Return a empty list in case of failure. 144 std::vector<std::string> get_locales_in_png(const std::string& png_name); 145 146 // Free a surface allocated by any of the res_create_*_surface() 147 // functions. 148 void res_free_surface(GRSurface* surface); 149 150 #endif 151
