/*
* Brief : Very Simple Bitmap library
* Date : 2015.05.23
*/
#include "vsbl.h"
#include <stdio.h>
#include <stdlib.h>
#pragma pack(2)
typedef struct {
short bfType;
long bfSize;
short bfReserved1;
short bfReserved2;
long bfOffBits;
} VSBL_tagBITMAPFILEHEADER;
typedef struct {
long biSize;
long biWidth;
long biHeight;
short biPlanes;
short biBitCount;
short biCompression;
long biSizeImage;
long biXPelsPerMeter;
long biYPelsPerMeter;
long biClrUsed;
long biClrImportant;
} VSBL_tagBITMAPINFOHEADER;
typedef struct {
char rgbBule;
char rgbGreen;
char rgbRed;
char rgbReserved;
}VSBL_tagRGBQUAD;
typedef struct {
unsigned char B;
unsigned char G;
unsigned char R;
}VSBL_Pixel;
typedef struct {
VSBL_tagBITMAPFILEHEADER BitmapFileHeader;
VSBL_tagBITMAPINFOHEADER BitmapInfoHeader;
VSBL_tagRGBQUAD RGBQUAD;
VSBL_Pixel *img;
}VSBL_BITMAP;
static long getBitmapOffsetBit(VSBL_BITMAP *bitmap)
{
if(bitmap == NULL)
{
return 0;
}
return bitmap->BitmapFileHeader.bfOffBits;
}
static long getBitmapImagesize(VSBL_BITMAP *bitmap)
{
if(bitmap == NULL)
{
return 0;
}
return bitmap->BitmapInfoHeader.biSizeImage;
}
static long getBitmapWidth(VSBL_BITMAP *bitmap)
{
if(bitmap == NULL)
{
return 0;
}
return bitmap->BitmapInfoHeader.biWidth;
}
static long getBitmapHeight(VSBL_BITMAP *bitmap)
{
if(bitmap == NULL)
{
return 0;
}
return bitmap->BitmapInfoHeader.biHeight;
}
VSBL_BITMAP_HANDLE vsbl_LoadBitmap(const char* filename)
{
int cnt =0;
char tra[10];
FILE *fp = 0;
if((fp=fopen(filename,"rb")) == 0)
{
return NULL;
}
VSBL_BITMAP *bitmap = (VSBL_BITMAP*)malloc(sizeof(VSBL_BITMAP));
memset(bitmap,0,sizeof(VSBL_BITMAP));
bitmap->BitmapFileHeader.bfOffBits = 0;
fread(&bitmap->BitmapFileHeader,sizeof(VSBL_tagBITMAPFILEHEADER),1,fp);
fread(&bitmap->BitmapInfoHeader,sizeof(VSBL_tagBITMAPINFOHEADER),1,fp);
fread(&bitmap->RGBQUAD,sizeof(VSBL_tagRGBQUAD),1,fp);
bitmap->img = (VSBL_Pixel*)malloc(getBitmapImagesize(bitmap));
fseek(fp,getBitmapOffsetBit(bitmap),SEEK_SET);
for(cnt=0;cnt<getBitmapHeight(bitmap);cnt++)
{
fread(&bitmap->img[getBitmapWidth(bitmap)*(cnt)],sizeof(VSBL_Pixel),getBitmapWidth(bitmap),fp);
fread(tra,sizeof(char),getBitmapWidth(bitmap)%4,fp);
}
fclose(fp);
return (VSBL_BITMAP_HANDLE)bitmap;
}
VSBL_ERROR vsbl_SaveBitmap(const VSBL_BITMAP_HANDLE bitmap_handle, const char* filename)
{
int cnt =0;
char tra[5] = {0xff,0xff,0xff,0xff,0xff};
FILE *fp = NULL;
VSBL_BITMAP *bitmap = (VSBL_BITMAP*)bitmap_handle;
if((fp=fopen(filename,"wb")) == 0)
{
return VSBL_ERROR_FILE_OPEN_ERROR;
}
fwrite(&bitmap->BitmapFileHeader,sizeof(VSBL_tagBITMAPFILEHEADER),1,fp);
fwrite(&bitmap->BitmapInfoHeader,sizeof(VSBL_tagBITMAPINFOHEADER),1,fp);
fwrite(&bitmap->RGBQUAD,sizeof(VSBL_tagRGBQUAD),1,fp);
fseek(fp,getBitmapOffsetBit(bitmap),SEEK_SET);
for(cnt=0;cnt<getBitmapHeight(bitmap);cnt++)
{
fwrite(&bitmap->img[getBitmapWidth(bitmap)*(cnt)],sizeof(VSBL_Pixel),getBitmapWidth(bitmap),fp);
fwrite(tra,sizeof(char),getBitmapWidth(bitmap)%4,fp);
}
fclose(fp);
return VSBL_SUCCESS;
}
void vsbl_ReleaseBitmap (VSBL_BITMAP_HANDLE hbitmap)
{
VSBL_BITMAP *bitmap = (VSBL_BITMAP*)hbitmap;
free(bitmap->img);
free(bitmap);
}
VSBL_Pixel getPixel(VSBL_BITMAP_HANDLE hbitmap, int x, int y)
{
VSBL_BITMAP *bitmap = (VSBL_BITMAP*)hbitmap;
return bitmap->img[getBitmapWidth(bitmap) * (y) + x];
}
VSBL_ERROR setPixel(VSBL_BITMAP_HANDLE hbitmap, VSBL_Pixel pixel, int x, int y)
{
VSBL_BITMAP *bitmap = (VSBL_BITMAP*)hbitmap;
bitmap->img[getBitmapWidth(bitmap)*(y) + x] = pixel;
return VSBL_SUCCESS;
}
VSBL_ERROR toGrayScale(VSBL_BITMAP_HANDLE hbitmap)
{
VSBL_BITMAP *bitmap = (VSBL_BITMAP*)hbitmap;
int x =0, y =0;
for(y=0;y<getBitmapHeight(bitmap);y++)
{
for(x=0;x<getBitmapWidth(bitmap);x++)
{
VSBL_Pixel px = getPixel(bitmap,x,y);
int level = (px.B + px.G + px.R) / 3;
px.B = level;
px.G = level;
px.R = level;
setPixel(bitmap,px,x,y);
}
}
return VSBL_SUCCESS;
}
VSBL_ERROR toBinScale(VSBL_BITMAP_HANDLE hbitmap, unsigned char level)
{
VSBL_BITMAP *bitmap = (VSBL_BITMAP*)hbitmap;
int x =0, y =0;
for(y=0;y<getBitmapHeight(bitmap);y++)
{
for(x=0;x<getBitmapWidth(bitmap);x++)
{
VSBL_Pixel px = getPixel(bitmap,x,y);
px.B = (px.B > level) ? 255 : 0;
px.G = (px.G > level) ? 255 : 0;
px.R = (px.R > level) ? 255 : 0;
setPixel(bitmap,px,x,y);
}
}
return VSBL_SUCCESS;
}
VSBL_ERROR vsbl_SaveAsciiMap(VSBL_BITMAP_HANDLE bitmap_handle, const char* filename)
{
FILE *fp = NULL;
VSBL_BITMAP *bitmap = (VSBL_BITMAP*)bitmap_handle;
if((fp=fopen(filename,"w")) == 0)
{
return VSBL_ERROR_FILE_OPEN_ERROR;
}
int x=0,y=0;
for(y=0;y<getBitmapHeight(bitmap);y++)
{
for(x=0;x<getBitmapWidth(bitmap);x++)
{
VSBL_Pixel px;
px = getPixel(bitmap,x,getBitmapHeight(bitmap) - y);
if(px.B == 0)
{
fprintf(fp,"##");
} else {
fprintf(fp," ");
}
}
fprintf(fp,"\n");
}
fclose(fp);
return VSBL_SUCCESS;
}
