PictureDemo.cpp

00001 /******************************************************************************
00002  * Includes
00003  *****************************************************************************/
00004 
00005 #include "mbed.h"
00006 
00007 #include "LcdController.h"
00008 #include "EaLcdBoard.h"
00009 #include "PictureDemo.h"
00010 
00011 #include "Image.h"
00012 
00013 extern const unsigned char eaLogo_image[];
00014 extern int eaLogo_image_sz;
00015 
00016 extern const unsigned char splash_image[];
00017 extern int splash_image_sz;
00018 
00019 /******************************************************************************
00020  * Typedefs and defines
00021  *****************************************************************************/
00022 
00023 /******************************************************************************
00024  * Local variables
00025  *****************************************************************************/
00026 
00027 /******************************************************************************
00028  * External variables
00029  *****************************************************************************/
00030 
00031 
00032 /******************************************************************************
00033  * Local functions
00034  *****************************************************************************/
00035 
00036 void PictureDemo::drawCentered(const unsigned char* pData, int size, uint32_t delayMs)
00037 {
00038     Image::ImageData_t data;
00039     int result = Image::decode(pData, size, &data);
00040     if (result == 0)
00041     {
00042         // Draw the image centered on the screen
00043         unsigned int xoff = (windowX - data.width)/2;
00044         unsigned int yoff = (windowY - data.height)/2;
00045         for (int y = 0; y < data.height; y++)
00046         {
00047             memcpy(this->pFrmBuf1 + (y+yoff)*windowX + xoff, 
00048                    data.pixels + y*data.width, 
00049                    data.width*2);
00050         }
00051         
00052         free(data.pixels);    
00053     }
00054     else
00055     {
00056         printf("Failed to decode image\n");
00057     }
00058 }
00059 
00060 /******************************************************************************
00061  * Public functions
00062  *****************************************************************************/
00063 PictureDemo::PictureDemo(uint8_t *pFrameBuf, uint16_t dispWidth, uint16_t dispHeight)
00064 {
00065     this->windowX = dispWidth;
00066     this->windowY = dispHeight;
00067     this->pFrmBuf  = (uint16_t *)pFrameBuf;
00068     this->pFrmBuf1 = (uint16_t *)pFrameBuf;
00069     this->pFrmBuf2 = (uint16_t *)((uint32_t)pFrameBuf + dispWidth*dispHeight*2);
00070     this->pFrmBuf3 = (uint16_t *)((uint32_t)pFrameBuf + dispWidth*dispHeight*4);
00071 }
00072 
00073 void PictureDemo::run(EaLcdBoardGPIO& lcdBoard, int image, uint32_t delayMs)
00074 {
00075   printf("PictureDemo, image %d, %dms delay\n", image, delayMs);
00076   
00077     memset(this->pFrmBuf1, 0xff, windowX*windowY*2);
00078     switch (image)
00079     {
00080         case 1:
00081             drawCentered(eaLogo_image, eaLogo_image_sz, delayMs);
00082             break;
00083         
00084         default:
00085             drawCentered(splash_image, splash_image_sz, delayMs);
00086             break;
00087     }
00088 
00089     //update framebuffer
00090     lcdBoard.setFrameBuffer((uint32_t)this->pFrmBuf1);
00091     
00092     wait_ms(delayMs);
00093 }
00094