BiosDisplay.h

00001 /*
00002  *  Copyright 2014 Embedded Artists AB
00003  *
00004  *  Licensed under the Apache License, Version 2.0 (the "License");
00005  *  you may not use this file except in compliance with the License.
00006  *  You may obtain a copy of the License at
00007  *
00008  *    http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  *  Unless required by applicable law or agreed to in writing, software
00011  *  distributed under the License is distributed on an "AS IS" BASIS,
00012  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  *  See the License for the specific language governing permissions and
00014  *  limitations under the License.
00015  */
00016 
00017 #ifndef BIOSDISPLAY_H
00018 #define BIOSDISPLAY_H
00019 
00020 #include "mbed.h"
00021 #include "TouchPanel.h"
00022 #include "Display.h"
00023 #include "bios.h"
00024 
00025 /**
00026  * Glue between the BIOS and the Display interface.
00027  */
00028 class BiosDisplay : public Display {
00029 public:
00030     
00031     /** Get the only instance of the BiosDisplay
00032      *
00033      *  @returns The display
00034      */
00035     static BiosDisplay& instance()
00036     {
00037         static BiosDisplay singleton;
00038         return singleton;
00039     }
00040   
00041 
00042     /** Initializes the display but does not turn it on
00043      *
00044      *  @returns
00045      *       Ok on success
00046      *       An error code on failure
00047      */
00048     DisplayError init();
00049   
00050     // From the Display interface
00051     virtual DisplayError powerUp(void* framebuffer, Resolution wanted = Resolution_16bit_rgb565, FrameRate_t rate = FrameRate_Normal);
00052     virtual DisplayError powerDown();
00053     virtual DisplayError backlight(int percent);
00054     virtual uint16_t width();
00055     virtual uint16_t height();
00056     virtual uint16_t bytesPerPixel();
00057     virtual uint32_t fbSize();
00058     virtual bool landscape();
00059     virtual bool isSupported(Resolution res);
00060     virtual Resolution currentResolution();
00061     virtual void setFramebuffer(void* buff);
00062     virtual void* swapFramebuffer(void* buff);
00063     virtual void* allocateFramebuffer(Resolution res=Resolution_16bit_rgb565);
00064     virtual void* allocateFramebuffers(uint32_t num=1, Resolution res=Resolution_16bit_rgb565);
00065 
00066 private:
00067 
00068     bool _initialized;
00069     bool _poweredOn;
00070 
00071     bios_header_t* _bios;
00072     void* _biosData;
00073 
00074     uint16_t _width;
00075     uint16_t _height;
00076     uint16_t _bpp;
00077     uint16_t _supportedRes;
00078     Resolution_t _activeRes;
00079     bool _landscape;
00080 
00081     explicit BiosDisplay();
00082     // hide copy constructor
00083     BiosDisplay(const BiosDisplay&);
00084     // hide assign operator
00085     BiosDisplay& operator=(const BiosDisplay&);
00086     ~BiosDisplay();
00087 
00088     uint32_t bpp(Resolution res) { return ((res == Resolution_16bit_rgb565) ? 2 : 4); }
00089 };
00090 
00091 #endif /* BIOSDISPLAY_H */