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|
/**
* GraphLCD plugin for the Video Disk Recorder
*
* bmp.c - bmp logo class
*
* (C) 2004 Andreas Brachold <vdr04 AT deltab de>
* (C) 2001-2004 Carsten Siebholz <c.siebholz AT t-online de>
**/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; *
* if not, write to the Free Software Foundation, Inc., *
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
* *
***************************************************************************/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <cstring>
#include <cstdlib>
#include <glcdgraphics/bitmap.h>
#include <glcdgraphics/image.h>
#include "bmp.h"
#pragma pack(1)
typedef struct BMPH {
uint16_t bmpIdentifier;
uint32_t bmpFileSize;
uint32_t bmpReserved;
uint32_t bmpBitmapDataOffset;
uint32_t bmpBitmapHeaderSize;
uint32_t bmpWidth;
uint32_t bmpHeight;
uint16_t bmpPlanes;
uint16_t bmpBitsPerPixel;
uint32_t bmpCompression;
uint32_t bmpBitmapDataSize;
uint32_t bmpHResolution;
uint32_t bmpVResolution;
uint32_t bmpColors;
uint32_t bmpImportantColors;
} BMPHEADER; // 54 bytes
typedef struct RGBQ {
uint8_t rgbBlue;
uint8_t rgbGreen;
uint8_t rgbRed;
uint8_t rgbReserved;
} RGBQUAD; // 4 bytes
#pragma pack()
uint8_t bitmask[8] = {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
uint8_t bitmaskl[8] = {0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff};
uint8_t bitmaskr[8] = {0xff, 0x7f, 0x3f, 0x1f, 0x0f, 0x07, 0x03, 0x01};
cBMPFile::cBMPFile()
{
}
cBMPFile::~cBMPFile()
{
}
bool cBMPFile::Load(GLCD::cImage & image, const std::string & fileName)
{
FILE *fIN;
BMPHEADER bmpHeader;
RGBQUAD *pPalette;
char *pByte;
char Dummy;
long iNumColors;
long iSize;
uint32_t x, y;
uint16_t iRead;
uint8_t * bitmap = NULL;
bool bInvert = false;
if (fileName.length() > 0)
{
fIN = fopen(fileName.c_str(), "rb");
if (fIN)
{
if (fread(&bmpHeader, sizeof(BMPHEADER), 1, fIN)!=1)
{
fclose(fIN);
return false;
}
// check for Windows BMP
if (bmpHeader.bmpBitmapHeaderSize != 0x00000028 )
{
fprintf(stderr, "ERROR: only Windows BMP images are allowed.\n");
fclose(fIN);
return false;
}
// check for 2 color
iNumColors = (1 << bmpHeader.bmpBitsPerPixel);
if (iNumColors != 2)
{
fprintf(stderr, "ERROR: the image has %ld colors, but only images with 2 colors are allowed.\n", iNumColors);
fclose(fIN);
return false;
}
iSize = bmpHeader.bmpHeight * bmpHeader.bmpWidth;
pPalette = (RGBQUAD *) malloc( iNumColors*sizeof(RGBQUAD));
if (!pPalette)
{
fprintf(stderr, "ERROR: cannot allocate memory\n");
fclose(fIN);
return false;
}
if (fread( pPalette, iNumColors*sizeof(RGBQUAD), 1, fIN)!=1)
{
free(pPalette);
fclose(fIN);
return false;
}
// check colors
if (pPalette->rgbBlue+pPalette->rgbGreen+pPalette->rgbRed <
(pPalette+1)->rgbBlue+(pPalette+1)->rgbGreen+(pPalette+1)->rgbRed)
{
// index 0 represents 'black', index 1 'white'
bInvert = !bInvert;
}
else
{
// index 0 represents 'white', index 1 'black'
}
if (fseek(fIN, bmpHeader.bmpBitmapDataOffset, SEEK_SET)==EOF)
{
free(pPalette);
fclose(fIN);
return false;
}
switch (bmpHeader.bmpCompression)
{
case 0: // BI_RGB no compression
image.Clear();
image.SetWidth(bmpHeader.bmpWidth);
image.SetHeight(bmpHeader.bmpHeight);
image.SetDelay(100);
bitmap = new unsigned char[bmpHeader.bmpHeight * ((bmpHeader.bmpWidth + 7) / 8)];
if (!bitmap)
{
fprintf(stderr, "ERROR: cannot allocate memory\n");
free(pPalette);
fclose(fIN);
image.Clear();
return false;
}
for (y = bmpHeader.bmpHeight; y > 0; y--)
{
pByte = (char*)bitmap + (y-1)*((bmpHeader.bmpWidth+7)/8);
iRead = 0;
for (x = 0; x < bmpHeader.bmpWidth / 8; x++)
{
if (fread(pByte, sizeof(char), 1, fIN) != 1)
{
delete[] bitmap;
free(pPalette);
fclose(fIN);
image.Clear();
return false;
}
iRead++;
if (bInvert)
*pByte = *pByte ^ 0xff;
pByte++;
}
if (bmpHeader.bmpWidth % 8)
{
if (fread(pByte, sizeof(char), 1, fIN) != 1)
{
delete [] bitmap;
free(pPalette);
fclose(fIN);
image.Clear();
return false;
}
iRead++;
if (bInvert)
*pByte = *pByte^0xff;
*pByte = *pByte & bitmaskl[bmpHeader.bmpWidth%8];
pByte++;
}
// Scan line must be 4-byte-alligned
while (iRead % 4)
{
if (fread(&Dummy, sizeof(char), 1, fIN) != 1)
{
delete [] bitmap;
free(pPalette);
fclose(fIN);
image.Clear();
return false;
}
iRead++;
}
}
image.AddBitmap(new GLCD::cBitmap(bmpHeader.bmpWidth, bmpHeader.bmpHeight, bitmap));
break;
case 1: // BI_RLE4 RLE 4bit/pixel
case 2: // BI_RLE8 RLE 8bit/pixel
case 3: // BI_BITFIELDS
default:
fprintf(stderr, "ERROR: only uncompressed RGB images are allowed.\n");
free(pPalette);
fclose(fIN);
return false;
}
fclose(fIN);
}
else
{
fprintf(stderr, "ERROR: cannot open picture %s\n", fileName.c_str());
}
}
else
{
fprintf(stderr, "ERROR: no FileName given!\n");
}
return true;
}
bool cBMPFile::Save(const GLCD::cBitmap * bitmap, const std::string & fileName)
{
FILE *fOut;
BMPHEADER bmpHeader;
RGBQUAD bmpColor1, bmpColor2;
uint32_t dBDO, dBDSx, dBDS;
char *pByte;
char Dummy = 0x00;
uint32_t x, y;
uint16_t iWrote;
const uint8_t * bmpdata = bitmap->Data();
if (bitmap
&& bitmap->Width() > 0
&& bitmap->Height() > 0)
{
memset(&bmpHeader, 0, sizeof(BMPHEADER));
dBDO = sizeof(BMPHEADER)+2*sizeof(RGBQUAD);
dBDSx = ((bitmap->Width() + 7) / 8 + 3) & 0xfffffffc;
dBDS = dBDSx * bitmap->Height();
bmpHeader.bmpIdentifier = 0x4d42; // "BM"
bmpHeader.bmpFileSize = dBDO + dBDS;
bmpHeader.bmpBitmapDataOffset = dBDO;
bmpHeader.bmpBitmapHeaderSize = 0x28;
bmpHeader.bmpWidth = bitmap->Width();
bmpHeader.bmpHeight = bitmap->Height();
bmpHeader.bmpPlanes = 0x01;
bmpHeader.bmpBitsPerPixel = 0x01;
bmpHeader.bmpCompression = 0x00;
bmpHeader.bmpBitmapDataSize = dBDS;
bmpHeader.bmpHResolution = 0xb13; // 72dpi
bmpHeader.bmpVResolution = 0xb13; // 72dpi
bmpHeader.bmpColors = 0x02;
bmpHeader.bmpImportantColors = 0x02;
bmpColor1.rgbBlue = 0x00;
bmpColor1.rgbGreen = 0x00;
bmpColor1.rgbRed = 0x00;
bmpColor1.rgbReserved = 0x00;
bmpColor2.rgbBlue = 0xff;
bmpColor2.rgbGreen = 0xff;
bmpColor2.rgbRed = 0xff;
bmpColor2.rgbReserved = 0x00;
fOut = fopen(fileName.c_str(), "wb");
if (!fOut)
{
fprintf(stderr,"Cannot create file: %s\n", fileName.c_str());
return false;
}
fwrite(&bmpHeader, sizeof(BMPHEADER), 1, fOut);
fwrite(&bmpColor1, sizeof(RGBQUAD), 1, fOut);
fwrite(&bmpColor2, sizeof(RGBQUAD), 1, fOut);
for (y=bitmap->Height(); y>0; y--)
{
pByte = (char*)bmpdata + (y-1)*((bitmap->Width()+7)/8);
iWrote = 0;
for (x=0; x<(uint32_t) bitmap->Width()/8; x++)
{
*pByte = *pByte^0xff;
if (fwrite(pByte, sizeof(char), 1, fOut)!=1)
{
fclose(fOut);
return false;
}
iWrote++;
pByte++;
}
// Scan line must be 4-byte-alligned
while (iWrote%4)
{
if (fwrite(&Dummy, sizeof(char), 1, fOut)!=1)
{
fclose(fOut);
return 3;
}
iWrote++;
}
}
fclose(fOut);
}
return true;
}
bool cBMPFile::Save(GLCD::cImage & image, const std::string & fileName)
{
const GLCD::cBitmap * bitmap;
if (image.Count() == 1)
{
bitmap = image.GetBitmap(0);
if (bitmap)
{
if (!Save(bitmap, fileName))
{
return false;
}
}
}
else
{
uint16_t i;
char tmpStr[256];
for (i = 0; i < image.Count(); i++)
{
sprintf(tmpStr, "%.248s.%05d", fileName.c_str(), i);
bitmap = image.GetBitmap(i);
if (bitmap)
{
if (!Save(bitmap, tmpStr))
{
return false;
}
}
}
}
return true;
}
|
