bmp_lib.c

Go to the documentation of this file.

/*This file has been prepared for Doxygen automatic documentation generation.*/
/* Copyright (c) 2007, Atmel Corporation All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * 3. The name of ATMEL may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY ATMEL ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY AND
 * SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "lcdc.h"
#include "usart.h"
#include <string.h>


typedef struct bm_file_header_s {
        unsigned short bfType;
        unsigned int bfSize;
        unsigned int bfReserved;
        unsigned int bfOffBits;
} __attribute__((__packed__)) bm_file_header_t ;

typedef struct bm_info_header_s {
        unsigned int biSize;
        int biWidth;
        int biHeight; 
        unsigned short  biPlanes;
        unsigned short  biBitCount;
        unsigned int    biCompression;

        unsigned int    biSizeImage;
        int     biXPelsPerMeter;
        int     biYPelsPerMeter;
        unsigned int    biClrUsed;      
        unsigned int    biClrImportant;         
}__attribute__((__packed__)) bm_info_header_t;

void swap_endian_blk(unsigned char *pblock, int size)
{
        unsigned char *pend = &pblock[size - 1];
        unsigned char temp;
        while(pblock < pend)
        {
                temp = *pblock;
                *pblock = *pend;
                *pend = temp;
                pblock++;
                pend--;
        }
}
void fill_virtual_frame_buffer_bm(lcdc_conf_t *lcdc_conf, bm_info_header_t *bm_info_header,unsigned char *data_start)
{
        unsigned int k,l;
        unsigned char * framePtr, *bm;
        
        /* set framebuffer start pointer to non-cached address */
        framePtr = (unsigned char *) (lcdc_conf->dmabaddr1 | 0xA0000000);
        bm = data_start;

        bm = bm + bm_info_header->biBitCount * bm_info_header->biWidth * (bm_info_header->biHeight - 1) / 8;
        for (l = 0 ; l < bm_info_header->biHeight; l++){
                for (k = 0; k < bm_info_header->biWidth; k++) {
                        framePtr++; /* empty */
                        *framePtr++ = *( bm + 0 );        /* blue */
                        *framePtr++ = *( bm + 1 );    /* green */
                        *framePtr++ = *( bm + 2 );    /* red */
                        framePtr++; 
                        *framePtr++ = *( bm + 0 );
                        *framePtr++ = *( bm + 1 );
                        *framePtr++ = *( bm + 2 );      
                        bm += 3;
                }
                bm = bm - bm_info_header->biBitCount * bm_info_header->biWidth / 8;
                for (k = 0; k < bm_info_header->biWidth; k++) {
                        framePtr++;
                        *framePtr++ = *( bm + 0 );
                        *framePtr++ = *( bm + 1 );
                        *framePtr++ = *( bm + 2 );
                        framePtr++;
                        *framePtr++ = *( bm + 0 );
                        *framePtr++ = *( bm + 1 );
                        *framePtr++ = *( bm + 2 );      
                        bm += 3;
                }
                bm = bm - bm_info_header->biBitCount *2* bm_info_header->biWidth / 8;
        }
}
void fill_frame_buffer_bm(lcdc_conf_t *lcdc_conf, bm_info_header_t *bm_info_header,unsigned char *data_start)
{
        
        unsigned int k,l;
        unsigned char * framePtr, *bm;
        unsigned short * pframe;
        unsigned short red,green,blue;
        
        framePtr = (unsigned char *) (lcdc_conf->dmabaddr1 | 0xA0000000);
        bm = data_start;
        if(lcdc_conf->pixelsize == BPP_24){
        if(bm_info_header->biHeight < 0){
                for (l = 0; l < bm_info_header->biHeight; l++){
                        for (k = 0; k < bm_info_header->biWidth; k++) {
                                *framePtr++ = *( bm + 0 );        /* blue */
                                *framePtr++ = *( bm + 1 );    /* green */
                                *framePtr++ = *( bm + 2 );    /* red */
                                bm += 3;
                        }
                if(bm_info_header->biWidth < lcdc_conf->xres)
                        framePtr += (lcdc_conf->xres - bm_info_header->biWidth) * 3; 

                }
        }
        else {
                bm = bm + bm_info_header->biBitCount * bm_info_header->biWidth * (bm_info_header->biHeight - 1) / 8;
                for (l = 0 ; l < bm_info_header->biHeight; l++){
                        for (k = 0; k < bm_info_header->biWidth; k++) {
                                *framePtr++ = *(bm + 0);
                                *framePtr++ = *(bm + 1);
                                *framePtr++ = *(bm + 2);
                                bm += 3;
                        }
                        bm = bm - bm_info_header->biBitCount *2* bm_info_header->biWidth / 8;
                        if(bm_info_header->biWidth < lcdc_conf->xres)
                                framePtr += (lcdc_conf->xres - bm_info_header->biWidth) * 3; 

                }
        }
        }
        if(lcdc_conf->pixelsize == BPP_16){
                pframe = (unsigned short *) framePtr;
                if(bm_info_header->biHeight > 0) {
                        
                        bm = bm + bm_info_header->biBitCount * bm_info_header->biWidth * (bm_info_header->biHeight - 1) / 8;
                        for (l = 0 ; l < bm_info_header->biHeight; l++){
                                for (k = 0; k < bm_info_header->biWidth; k++) {
                                        
                                        blue = *(bm + 2) >> 3;
                                        green = *(bm +1) >> 3;
                                        red = *bm >> 3;
                                        *pframe++ = ((blue << 10) & 0x7C00) | ((green << 5) & 0x03E0) | (red & 0x001F);
                                        bm += 3;
                                }
                                bm = bm - bm_info_header->biBitCount *2* bm_info_header->biWidth / 8;
                                if(bm_info_header->biWidth < lcdc_conf->xres)
                                        pframe += (lcdc_conf->xres - bm_info_header->biWidth); 

                        }
                }
        }
}
int display_virtual_bm(lcdc_conf_t *lcdc_conf, void * file_start){
        
        bm_file_header_t bm_file_header;
        bm_info_header_t bm_info_header;
        unsigned char * data_start;
        
        /* get file header and header information */
        memcpy(&bm_file_header, file_start, sizeof(bm_file_header_t));
        memcpy(&bm_info_header, file_start + 14, sizeof(bm_info_header_t));
        
        /* correct endianess */
        swap_endian_blk((unsigned char *) &bm_file_header.bfType, 2);
        swap_endian_blk((unsigned char *) &bm_file_header.bfSize, 4);
        swap_endian_blk((unsigned char *) &bm_file_header.bfOffBits, 4);
        swap_endian_blk((unsigned char *) &bm_info_header.biWidth, 4);
        swap_endian_blk((unsigned char *) &bm_info_header.biHeight, 4);
        swap_endian_blk((unsigned char *) &bm_info_header.biBitCount, 2);
        swap_endian_blk((unsigned char *) &bm_info_header.biCompression, 4);
        
        
        data_start = file_start + bm_file_header.bfOffBits;     
        fill_virtual_frame_buffer_bm(lcdc_conf, &bm_info_header, data_start);
        
        return 0;               
}
int display_bm(lcdc_conf_t *lcdc_conf, void * file_start){
        
        bm_file_header_t bm_file_header;
        bm_info_header_t bm_info_header;
        unsigned char * data_start;
        
        /* get file header and header information */
        memcpy(&bm_file_header, file_start, sizeof(bm_file_header_t));
        memcpy(&bm_info_header, file_start + 14, sizeof(bm_info_header_t));
        
        /* correct endianess */
        swap_endian_blk((unsigned char *) &bm_file_header.bfType, 2);
        swap_endian_blk((unsigned char *) &bm_file_header.bfSize, 4);
        swap_endian_blk((unsigned char *) &bm_file_header.bfOffBits, 4);
        swap_endian_blk((unsigned char *) &bm_info_header.biWidth, 4);
        swap_endian_blk((unsigned char *) &bm_info_header.biHeight, 4);
        swap_endian_blk((unsigned char *) &bm_info_header.biBitCount, 2);
        swap_endian_blk((unsigned char *) &bm_info_header.biCompression, 4);
        
        
        data_start = file_start + bm_file_header.bfOffBits;     
        fill_frame_buffer_bm(lcdc_conf, &bm_info_header, data_start);
        
        return 0;               
}

---