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 <stdbool.h> 23 24 #ifdef __cplusplus 25 extern "C" { 26 #endif 27 28 typedef struct { 29 int width; 30 int height; 31 int row_bytes; 32 int pixel_bytes; 33 unsigned char* data; 34 } GRSurface; 35 36 typedef GRSurface* gr_surface; 37 38 int gr_init(void); 39 void gr_exit(void); 40 41 int gr_fb_width(void); 42 int gr_fb_height(void); 43 44 void gr_flip(void); 45 void gr_fb_blank(bool blank); 46 47 void gr_clear(); // clear entire surface to current color 48 void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a); 49 void gr_fill(int x1, int y1, int x2, int y2); 50 void gr_text(int x, int y, const char *s, int bold); 51 void gr_texticon(int x, int y, gr_surface icon); 52 int gr_measure(const char *s); 53 void gr_font_size(int *x, int *y); 54 55 void gr_blit(gr_surface source, int sx, int sy, int w, int h, int dx, int dy); 56 unsigned int gr_get_width(gr_surface surface); 57 unsigned int gr_get_height(gr_surface surface); 58 59 // input event structure, include <linux/input.h> for the definition. 60 // see http://www.mjmwired.net/kernel/Documentation/input/ for info. 61 struct input_event; 62 63 typedef int (*ev_callback)(int fd, uint32_t epevents, void *data); 64 typedef int (*ev_set_key_callback)(int code, int value, void *data); 65 66 int ev_init(ev_callback input_cb, void *data); 67 void ev_exit(void); 68 int ev_add_fd(int fd, ev_callback cb, void *data); 69 int ev_sync_key_state(ev_set_key_callback set_key_cb, void *data); 70 71 /* timeout has the same semantics as for poll 72 * 0 : don't block 73 * < 0 : block forever 74 * > 0 : block for 'timeout' milliseconds 75 */ 76 int ev_wait(int timeout); 77 78 int ev_get_input(int fd, uint32_t epevents, struct input_event *ev); 79 void ev_dispatch(void); 80 int ev_get_epollfd(void); 81 82 // Resources 83 84 // res_create_*_surface() functions return 0 if no error, else 85 // negative. 86 // 87 // A "display" surface is one that is intended to be drawn to the 88 // screen with gr_blit(). An "alpha" surface is a grayscale image 89 // interpreted as an alpha mask used to render text in the current 90 // color (with gr_text() or gr_texticon()). 91 // 92 // All these functions load PNG images from "/res/images/${name}.png". 93 94 // Load a single display surface from a PNG image. 95 int res_create_display_surface(const char* name, gr_surface* pSurface); 96 97 // Load an array of display surfaces from a single PNG image. The PNG 98 // should have a 'Frames' text chunk whose value is the number of 99 // frames this image represents. The pixel data itself is interlaced 100 // by row. 101 int res_create_multi_display_surface(const char* name, 102 int* frames, gr_surface** pSurface); 103 104 // Load a single alpha surface from a grayscale PNG image. 105 int res_create_alpha_surface(const char* name, gr_surface* pSurface); 106 107 // Load part of a grayscale PNG image that is the first match for the 108 // given locale. The image is expected to be a composite of multiple 109 // translations of the same text, with special added rows that encode 110 // the subimages' size and intended locale in the pixel data. See 111 // development/tools/recovery_l10n for an app that will generate these 112 // specialized images from Android resources. 113 int res_create_localized_alpha_surface(const char* name, const char* locale, 114 gr_surface* pSurface); 115 116 // Free a surface allocated by any of the res_create_*_surface() 117 // functions. 118 void res_free_surface(gr_surface surface); 119 120 #ifdef __cplusplus 121 } 122 #endif 123 124 #endif 125
