97eda9db70
Change-Id: I8ccf369d52011bc5d07d8e041fe558ce734a78fc
(cherry picked from commit d00f5eb63a)
135 lines
4.1 KiB
C++
135 lines
4.1 KiB
C++
/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _MINUI_H_
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#define _MINUI_H_
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#include <sys/types.h>
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#include <functional>
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//
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// Graphics.
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//
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struct GRSurface {
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int width;
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int height;
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int row_bytes;
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int pixel_bytes;
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unsigned char* data;
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};
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struct GRFont {
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GRSurface* texture;
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int char_width;
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int char_height;
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};
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int gr_init();
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void gr_exit();
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int gr_fb_width();
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int gr_fb_height();
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void gr_flip();
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void gr_fb_blank(bool blank);
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void gr_clear(); // clear entire surface to current color
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void gr_color(unsigned char r, unsigned char g, unsigned char b, unsigned char a);
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void gr_fill(int x1, int y1, int x2, int y2);
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void gr_texticon(int x, int y, GRSurface* icon);
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const GRFont* gr_sys_font();
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int gr_init_font(const char* name, GRFont** dest);
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void gr_text(const GRFont* font, int x, int y, const char *s, bool bold);
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int gr_measure(const GRFont* font, const char *s);
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void gr_font_size(const GRFont* font, int *x, int *y);
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void gr_blit(GRSurface* source, int sx, int sy, int w, int h, int dx, int dy);
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unsigned int gr_get_width(GRSurface* surface);
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unsigned int gr_get_height(GRSurface* surface);
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//
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// Input events.
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//
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struct input_event;
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// TODO: move these over to std::function.
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typedef int (*ev_callback)(int fd, uint32_t epevents, void* data);
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typedef int (*ev_set_key_callback)(int code, int value, void* data);
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int ev_init(ev_callback input_cb, void* data);
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void ev_exit();
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int ev_add_fd(int fd, ev_callback cb, void* data);
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void ev_iterate_available_keys(const std::function<void(int)>& f);
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int ev_sync_key_state(ev_set_key_callback set_key_cb, void* data);
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// 'timeout' has the same semantics as poll(2).
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// 0 : don't block
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// < 0 : block forever
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// > 0 : block for 'timeout' milliseconds
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int ev_wait(int timeout);
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int ev_get_input(int fd, uint32_t epevents, input_event* ev);
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void ev_dispatch();
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int ev_get_epollfd();
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//
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// Resources
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//
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bool matches_locale(const char* prefix, const char* locale);
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// res_create_*_surface() functions return 0 if no error, else
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// negative.
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//
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// A "display" surface is one that is intended to be drawn to the
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// screen with gr_blit(). An "alpha" surface is a grayscale image
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// interpreted as an alpha mask used to render text in the current
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// color (with gr_text() or gr_texticon()).
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//
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// All these functions load PNG images from "/res/images/${name}.png".
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// Load a single display surface from a PNG image.
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int res_create_display_surface(const char* name, GRSurface** pSurface);
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// Load an array of display surfaces from a single PNG image. The PNG
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// should have a 'Frames' text chunk whose value is the number of
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// frames this image represents. The pixel data itself is interlaced
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// by row.
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int res_create_multi_display_surface(const char* name, int* frames,
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int* fps, GRSurface*** pSurface);
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// Load a single alpha surface from a grayscale PNG image.
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int res_create_alpha_surface(const char* name, GRSurface** pSurface);
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// Load part of a grayscale PNG image that is the first match for the
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// given locale. The image is expected to be a composite of multiple
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// translations of the same text, with special added rows that encode
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// the subimages' size and intended locale in the pixel data. See
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// bootable/recovery/tools/recovery_l10n for an app that will generate
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// these specialized images from Android resources.
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int res_create_localized_alpha_surface(const char* name, const char* locale,
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GRSurface** pSurface);
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// Free a surface allocated by any of the res_create_*_surface()
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// functions.
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void res_free_surface(GRSurface* surface);
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#endif
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