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BitmapEx.cpp
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// BitmapEx.cpp: implementation of the CBitmapEx class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "BitmapEx.h"
#include <io.h>
#include <stdio.h>
#include <tchar.h>
#include <stdlib.h>
#include <math.h>
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CBitmapEx::CBitmapEx()
{
// Init members
m_lpData = NULL;
m_dwSize = 0;
m_iPaletteEntries = 0;
m_ResampleMode = RM_NEARESTNEIGHBOUR;
m_ColorMode = CM_RGB;
m_lpFire = NULL;
m_pFireBitmap = NULL;
m_lpWaterHeightField1 = NULL;
m_lpWaterHeightField2 = NULL;
m_bWaterFlip = FALSE;
m_iDamp = 5;
m_iLightModifier = 3;
m_pWaterBitmap = NULL;
m_lpSmokeField = NULL;
m_pSmokeBitmap = NULL;
}
CBitmapEx::~CBitmapEx()
{
// Deinit members
if (m_lpData != NULL)
{
free(m_lpData);
m_lpData = NULL;
}
if (m_lpFire != NULL)
{
free(m_lpFire);
m_lpFire = NULL;
}
if (m_pFireBitmap != NULL)
{
delete m_pFireBitmap;
m_pFireBitmap = NULL;
}
if (m_lpWaterHeightField1 != NULL)
{
free(m_lpWaterHeightField1);
m_lpWaterHeightField1 = NULL;
}
if (m_lpWaterHeightField2 != NULL)
{
free(m_lpWaterHeightField2);
m_lpWaterHeightField2 = NULL;
}
if (m_pWaterBitmap != NULL)
{
delete m_pWaterBitmap;
m_pWaterBitmap = NULL;
}
if (m_lpSmokeField != NULL)
{
free(m_lpSmokeField);
m_lpSmokeField = NULL;
}
if (m_pSmokeBitmap != NULL)
{
delete m_pSmokeBitmap;
m_pSmokeBitmap = NULL;
}
}
void CBitmapEx::Create(long width, long height)
{
// Deinit members
if (m_lpData != NULL)
{
free(m_lpData);
m_lpData = NULL;
}
// Format BITMAPINFOHEADER info
m_iBpp = _BITS_PER_PIXEL_32 >> 3;
memset(&m_bih, 0, sizeof(BITMAPINFOHEADER));
m_bih.biSize = sizeof(BITMAPINFOHEADER);
m_bih.biWidth = max(0, width);
m_bih.biHeight = max(0, height);
m_bih.biPlanes = 1;
m_bih.biBitCount = (WORD)(m_iBpp << 3);
m_iPaletteEntries = 0;
m_iPitch = m_bih.biWidth * m_iBpp;
m_dwSize = m_iPitch * m_bih.biHeight;
m_lpData = (LPBYTE)malloc(m_dwSize*sizeof(BYTE));
// Format BITMAPFILEHEADER info
memset(&m_bfh, 0, sizeof(BITMAPFILEHEADER));
m_bfh.bfType = 'MB';
m_bfh.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + m_dwSize;
m_bfh.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
}
void CBitmapEx::Create(CBitmapEx& bitmapEx)
{
// Check for valid bitmap
if (bitmapEx.IsValid())
{
// Deinit members
if (m_lpData != NULL)
{
free(m_lpData);
m_lpData = NULL;
}
// Calculate bitmap params
m_iBpp = bitmapEx.GetBpp() >> 3;
m_iPitch = bitmapEx.GetPitch();
memcpy(&m_bfh, bitmapEx.GetFileInfo(), sizeof(BITMAPFILEHEADER));
memcpy(&m_bih, bitmapEx.GetInfo(), sizeof(BITMAPINFOHEADER));
m_dwSize = bitmapEx.GetSize();
m_lpData = (LPBYTE)malloc(m_dwSize*sizeof(BYTE));
memcpy(m_lpData, bitmapEx.GetData(), m_dwSize*sizeof(BYTE));
m_iPaletteEntries = bitmapEx.GetPaletteEntries();
memcpy(m_lpPalette, bitmapEx.GetPalette(), m_iPaletteEntries*sizeof(RGBQUAD));
m_ResampleMode = bitmapEx.GetResampleMode();
}
}
void CBitmapEx::Create(CBitmapEx* pBitmapEx)
{
// Check for valid bitmap
if ((pBitmapEx != NULL) && (pBitmapEx->IsValid()))
{
// Deinit members
if (m_lpData != NULL)
{
free(m_lpData);
m_lpData = NULL;
}
// Calculate bitmap params
m_iBpp = pBitmapEx->GetBpp() >> 3;
m_iPitch = pBitmapEx->GetPitch();
memcpy(&m_bfh, pBitmapEx->GetFileInfo(), sizeof(BITMAPFILEHEADER));
memcpy(&m_bih, pBitmapEx->GetInfo(), sizeof(BITMAPINFOHEADER));
m_dwSize = pBitmapEx->GetSize();
m_lpData = (LPBYTE)malloc(m_dwSize*sizeof(BYTE));
memcpy(m_lpData, pBitmapEx->GetData(), m_dwSize*sizeof(BYTE));
m_iPaletteEntries = pBitmapEx->GetPaletteEntries();
memcpy(m_lpPalette, pBitmapEx->GetPalette(), m_iPaletteEntries*sizeof(RGBQUAD));
m_ResampleMode = pBitmapEx->GetResampleMode();
}
}
bool CBitmapEx::Load(LPCTSTR lpszBitmapFile)
{
// Check for valid .BMP file path
if (lpszBitmapFile != NULL)
{
// Open .BMP file
FILE* file;
if (!_tfopen_s(&file, lpszBitmapFile, _T("rb")))
{
// Deinit members
if (m_lpData != NULL)
{
free(m_lpData);
m_lpData = NULL;
}
// Read BITMAPFILEHEADER info
fread(&m_bfh, 1, sizeof(BITMAPFILEHEADER), file);
// Read BITMAPINFOHEADER info
fread(&m_bih, 1, sizeof(BITMAPINFOHEADER), file);
// Calculate pitch
m_iBpp = m_bih.biBitCount >> 3;
m_iPitch = m_iBpp * m_bih.biWidth;
while ((m_iPitch & 3) != 0)
m_iPitch++;
// Check for bit-depth (8, 16, 24 and 32bpp only)
if (m_bih.biBitCount >= 8)
{
if (m_bih.biBitCount == 8)
{
// Calculate palette entries
m_iPaletteEntries = m_bih.biClrUsed;
if (m_iPaletteEntries == 0)
m_iPaletteEntries = 256;
// Read palette info
fread(m_lpPalette, m_iPaletteEntries, sizeof(RGBQUAD), file);
}
// Read image data
m_dwSize = m_iPitch * m_bih.biHeight;
m_lpData = (LPBYTE)malloc(m_dwSize*sizeof(BYTE));
fread(m_lpData, m_dwSize, sizeof(BYTE), file);
// Convert to 32bpp bitmap
_ConvertTo32Bpp();
}
// Close .BMP file
fclose(file);
return true;
}
}
return false;
}
void CBitmapEx::Load(LPBYTE lpBitmapData)
{
// Check for valid bitmap data buffer
if (lpBitmapData != NULL)
{
// Deinit members
if (m_lpData != NULL)
{
free(m_lpData);
m_lpData = NULL;
}
// Read BITMAPFILEHEADER info
memcpy(&m_bfh, lpBitmapData, sizeof(BITMAPFILEHEADER));
// Read BITMAPINFOHEADER info
memcpy(&m_bih, lpBitmapData+sizeof(BITMAPFILEHEADER), sizeof(BITMAPINFOHEADER));
// Calculate pitch
m_iBpp = m_bih.biBitCount >> 3;
m_iPitch = m_iBpp * m_bih.biWidth;
while ((m_iPitch & 3) != 0)
m_iPitch++;
// Check for bit-depth (8, 16, 24 and 32bpp only)
if (m_bih.biBitCount >= 8)
{
if (m_bih.biBitCount == 8)
{
// Calculate palette entries
m_iPaletteEntries = m_bih.biClrUsed;
if (m_iPaletteEntries == 0)
m_iPaletteEntries = 256;
// Read palette info
memcpy(m_lpPalette, lpBitmapData+sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER), m_iPaletteEntries*sizeof(RGBQUAD));
}
// Read image data
m_dwSize = m_iPitch * m_bih.biHeight;
m_lpData = (LPBYTE)malloc(m_dwSize*sizeof(BYTE));
memcpy(m_lpData, lpBitmapData+sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+m_iPaletteEntries*sizeof(RGBQUAD), m_dwSize*sizeof(BYTE));
// Convert to 32bpp bitmap
_ConvertTo32Bpp();
}
}
}
void CBitmapEx::Load(HBITMAP hBitmap)
{
// Check for valid bitmap handle
if (hBitmap != NULL)
{
// Deinit members
if (m_lpData != NULL)
{
free(m_lpData);
m_lpData = NULL;
}
// Get bitmap info
BITMAP bmp;
GetObject(hBitmap, sizeof(BITMAP), &bmp);
// Check for valid bitmap format (16, 24 and 32bpp only)
if (bmp.bmBitsPixel > 8)
{
// Get bitmap data
m_iBpp = bmp.bmBitsPixel >> 3;
m_iPitch = bmp.bmWidthBytes;
m_dwSize = bmp.bmHeight * m_iPitch;
m_lpData = (LPBYTE)malloc(m_dwSize*sizeof(BYTE));
GetBitmapBits(hBitmap, m_dwSize*sizeof(BYTE), m_lpData);
// Format BITMAPFILEHEADER info
memset(&m_bfh, 0, sizeof(BITMAPFILEHEADER));
m_bfh.bfType = 'MB';
m_bfh.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + m_dwSize;
m_bfh.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
// Format BITMAPINFOHEADER info
memset(&m_bih, 0, sizeof(BITMAPINFOHEADER));
m_bih.biSize = sizeof(BITMAPINFOHEADER);
m_bih.biWidth = bmp.bmWidth;
m_bih.biHeight = bmp.bmHeight;
m_bih.biPlanes = 1;
m_bih.biBitCount = bmp.bmBitsPixel;
// Convert to 32bpp bitmap
_ConvertTo32Bpp();
FlipVertical();
}
}
}
void CBitmapEx::Save(LPCTSTR lpszBitmapFile)
{
// Check for valid .BMP file path
if (lpszBitmapFile != NULL)
{
// Convert to 24bpp bitmap
_ConvertTo24Bpp();
// Open .BMP file
FILE* file;
if (!_tfopen_s(&file, lpszBitmapFile, _T("wb")))
{
// Write BITMAPFILEHEADER info
fwrite(&m_bfh, 1, sizeof(BITMAPFILEHEADER), file);
// Write BITMAPINFOHEADER info
fwrite(&m_bih, 1, sizeof(BITMAPINFOHEADER), file);
// Check for palettized bitmap
if (m_bih.biBitCount == 8)
{
// Write palette info
fwrite(m_lpPalette, m_iPaletteEntries, sizeof(RGBQUAD), file);
}
// Write image data
fwrite(m_lpData, m_dwSize, sizeof(BYTE), file);
// Close .BMP file
fclose(file);
}
// Convert to 32bpp bitmap
_ConvertTo32Bpp();
}
}
void CBitmapEx::Save(LPBYTE lpBitmapData)
{
// Check for valid bitmap data buffer
if (lpBitmapData != NULL)
{
// Convert to 24bpp bitmap
_ConvertTo24Bpp();
// Write BITMAPFILEHEADER info
memcpy(lpBitmapData, &m_bfh, sizeof(BITMAPFILEHEADER));
// Write BITMAPINFOHEADER info
memcpy(lpBitmapData+sizeof(BITMAPFILEHEADER), &m_bih, sizeof(BITMAPINFOHEADER));
// Check for palettized bitmap
if (m_bih.biBitCount == 8)
{
// Write palette info
memcpy(lpBitmapData+sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER), m_lpPalette, m_iPaletteEntries*sizeof(RGBQUAD));
}
// Write image data
memcpy(lpBitmapData+sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+m_iPaletteEntries*sizeof(RGBQUAD), m_lpData, m_dwSize*sizeof(BYTE));
// Convert to 32bpp bitmap
_ConvertTo32Bpp();
}
}
void CBitmapEx::Save(HBITMAP& hBitmap)
{
// Check for valid bitmap data buffer and handle
if ((IsValid()) && (hBitmap == NULL))
{
// Write bitmap data
FlipVertical();
hBitmap = CreateBitmap(m_bih.biWidth, m_bih.biHeight, 1, m_bih.biBitCount, m_lpData);
FlipVertical();
}
}
float CBitmapEx::_ARG(float xa, float ya)
{
float _arg = 0.0f;
// Calculate ARG
if ((xa == 0.0f) && (ya == 0.0f))
_arg = 0.0f;
if ((xa == 0.0f) && (ya >= 0.0f))
_arg = _PI / 2;
if ((ya == 0.0f) && (xa < 0.0f))
_arg = _PI;
if ((xa == 0.0f) && (ya < 0.0f))
_arg = -_PI / 2;
if (xa > 0.0f)
_arg = atan(ya / xa);
if ((xa < 0.0f) && (ya >= 0.0f))
_arg = _PI - atan(-ya / xa);
if ((xa < 0.0f) && (ya < 0.0f))
_arg = -_PI + atan(-ya / -xa);
return _arg;
}
float CBitmapEx::_MOD(float x, float y, float z)
{
float _mod = 0.0f;
// Calculate MOD
_mod = sqrt(x*x + y*y + z*z);
return _mod;
}
void CBitmapEx::_ConvertTo32Bpp()
{
// Check for valid bitmap
if (IsValid())
{
// Calculate new params
long _bpp = (_BITS_PER_PIXEL_32 >> 3);
long _pitch = m_bih.biWidth * _bpp;
// Create temporary bitmap
DWORD dwSize = _pitch * m_bih.biHeight;
LPBYTE lpData = (LPBYTE)malloc(dwSize*sizeof(BYTE));
// Convert bitmap
DWORD dwDstHorizontalOffset;
DWORD dwDstVerticalOffset = 0;
DWORD dwDstTotalOffset;
LPDWORD lpDstData = (LPDWORD)lpData;
DWORD dwSrcHorizontalOffset;
DWORD dwSrcVerticalOffset = 0;
DWORD dwSrcTotalOffset;
for (long i=0; i<m_bih.biHeight; i++)
{
dwDstHorizontalOffset = 0;
dwSrcHorizontalOffset = 0;
for (long j=0; j<m_bih.biWidth; j++)
{
// Update destination total offset
dwDstTotalOffset = dwDstVerticalOffset + dwDstHorizontalOffset;
// Update source total offset
dwSrcTotalOffset = dwSrcVerticalOffset + dwSrcHorizontalOffset;
// Update bitmap
switch (m_bih.biBitCount)
{
case 8:
{
BYTE red = m_lpPalette[m_lpData[dwSrcTotalOffset]].rgbRed;
BYTE green = m_lpPalette[m_lpData[dwSrcTotalOffset]].rgbGreen;
BYTE blue = m_lpPalette[m_lpData[dwSrcTotalOffset]].rgbBlue;
lpDstData[dwDstTotalOffset>>2] = _RGB(red, green, blue);
}
break;
case 16:
{
LPWORD lpSrcData = (LPWORD)m_lpData;
BYTE red = (lpSrcData[dwSrcTotalOffset>>1] & 0x7C00) >> 10;
BYTE green = (BYTE)((lpSrcData[dwSrcTotalOffset>>1] & 0x03E0) >> 5);
BYTE blue = lpSrcData[dwSrcTotalOffset>>1] & 0x001F;
lpDstData[dwDstTotalOffset>>2] = _RGB(red, green, blue);
}
break;
case 24:
{
lpDstData[dwDstTotalOffset>>2] = _RGB(m_lpData[dwSrcTotalOffset+2], m_lpData[dwSrcTotalOffset+1], m_lpData[dwSrcTotalOffset]);
}
break;
case 32:
{
LPDWORD lpSrcData = (LPDWORD)m_lpData;
lpDstData[dwDstTotalOffset>>2] = lpSrcData[dwSrcTotalOffset>>2];
}
break;
}
// Update destination horizontal offset
dwDstHorizontalOffset += _bpp;
// Update source horizontal offset
dwSrcHorizontalOffset += m_iBpp;
}
// Update destination vertical offset
dwDstVerticalOffset += _pitch;
// Update source vertical offset
dwSrcVerticalOffset += m_iPitch;
}
// Update bitmap info
m_iPitch = _pitch;
m_iBpp = _bpp;
free(m_lpData);
m_dwSize = dwSize;
m_lpData = lpData;
m_bfh.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + m_dwSize;
m_bfh.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
m_bih.biBitCount = _BITS_PER_PIXEL_32;
}
}
void CBitmapEx::_ConvertTo24Bpp()
{
// Check for valid bitmap
if (IsValid())
{
// Calculate new params
long _bpp = (_BITS_PER_PIXEL_24 >> 3);
long _pitch = m_bih.biWidth * _bpp;
while ((_pitch & 3) != 0)
_pitch++;
// Create temporary bitmap
DWORD dwSize = _pitch * m_bih.biHeight;
LPBYTE lpData = (LPBYTE)malloc(dwSize*sizeof(BYTE));
// Convert bitmap
DWORD dwDstHorizontalOffset;
DWORD dwDstVerticalOffset = 0;
DWORD dwDstTotalOffset;
DWORD dwSrcHorizontalOffset;
DWORD dwSrcVerticalOffset = 0;
DWORD dwSrcTotalOffset;
LPDWORD lpSrcData = (LPDWORD)m_lpData;
for (long i=0; i<m_bih.biHeight; i++)
{
dwDstHorizontalOffset = 0;
dwSrcHorizontalOffset = 0;
for (long j=0; j<m_bih.biWidth; j++)
{
// Update destination total offset
dwDstTotalOffset = dwDstVerticalOffset + dwDstHorizontalOffset;
// Update source total offset
dwSrcTotalOffset = dwSrcVerticalOffset + dwSrcHorizontalOffset;
// Update bitmap
lpData[dwDstTotalOffset+2] = _GetRValue(lpSrcData[dwSrcTotalOffset>>2]);
lpData[dwDstTotalOffset+1] = _GetGValue(lpSrcData[dwSrcTotalOffset>>2]);
lpData[dwDstTotalOffset] = _GetBValue(lpSrcData[dwSrcTotalOffset>>2]);
// Update destination horizontal offset
dwDstHorizontalOffset += _bpp;
// Update source horizontal offset
dwSrcHorizontalOffset += m_iBpp;
}
// Update destination vertical offset
dwDstVerticalOffset += _pitch;
// Update source vertical offset
dwSrcVerticalOffset += m_iPitch;
}
// Update bitmap info
m_iPitch = _pitch;
m_iBpp = _bpp;
free(m_lpData);
m_dwSize = dwSize;
m_lpData = lpData;
m_bfh.bfSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER) + m_dwSize;
m_bfh.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
m_bih.biBitCount = _BITS_PER_PIXEL_24;
}
}
void CBitmapEx::_ScaleNearestNeighbour(long horizontalPercent, long verticalPercent)
{
// Check for valid bitmap
if (IsValid())
{
// Calculate scaling params
long _horizontalPercent = max(1, horizontalPercent);
long _verticalPercent = max(1, verticalPercent);
float dx = 100.0f / (float)_horizontalPercent;
float dy = 100.0f / (float)_verticalPercent;
long _width = (long)((1.0f/dx) * (float)m_bih.biWidth + 0.5f);
long _height = (long)((1.0f/dy) * (float)m_bih.biHeight + 0.5f);
long _pitch = m_iBpp * _width;
while ((_pitch & 3) != 0)
_pitch++;
fixed f_dx = ftofx(dx);
fixed f_dy = ftofx(dy);
// Create temporary bitmap
DWORD dwSize = _pitch * _height;
LPBYTE lpData = (LPBYTE)malloc(dwSize*sizeof(BYTE));
// Scale bitmap
DWORD dwDstHorizontalOffset;
DWORD dwDstVerticalOffset = 0;
DWORD dwDstTotalOffset;
LPDWORD lpSrcData = (LPDWORD)m_lpData;
DWORD dwSrcTotalOffset;
LPDWORD lpDstData = (LPDWORD)lpData;
for (long i=0; i<_height; i++)
{
dwDstHorizontalOffset = 0;
for (long j=0; j<_width; j++)
{
// Update destination total offset
dwDstTotalOffset = dwDstVerticalOffset + dwDstHorizontalOffset;
// Update bitmap
fixed f_i = itofx(i);
fixed f_j = itofx(j);
fixed f_a = Mulfx(f_i, f_dy);
fixed f_b = Mulfx(f_j, f_dx);
long m = fxtoi(f_a);
long n = fxtoi(f_b);
dwSrcTotalOffset = m*m_iPitch + n*m_iBpp;
lpDstData[dwDstTotalOffset>>2] = lpSrcData[dwSrcTotalOffset>>2];
// Update destination horizontal offset
dwDstHorizontalOffset += m_iBpp;
}
// Update destination vertical offset
dwDstVerticalOffset += _pitch;
}
// Update bitmap info
m_iPitch = _pitch;
m_bih.biWidth = _width;
m_bih.biHeight = _height;
free(m_lpData);
m_dwSize = dwSize;
m_lpData = lpData;
}
}
void CBitmapEx::_ScaleBilinear(long horizontalPercent, long verticalPercent)
{
// Check for valid bitmap
if (IsValid())
{
// Calculate scaling params
long _horizontalPercent = max(1, horizontalPercent);
long _verticalPercent = max(1, verticalPercent);
float dx = 100.0f / (float)_horizontalPercent;
float dy = 100.0f / (float)_verticalPercent;
long _width = (long)((1.0f/dx) * (float)m_bih.biWidth + 0.5f);
long _height = (long)((1.0f/dy) * (float)m_bih.biHeight + 0.5f);
long _pitch = m_iBpp * _width;
while ((_pitch & 3) != 0)
_pitch++;
fixed f_dx = ftofx(dx);
fixed f_dy = ftofx(dy);
fixed f_1 = itofx(1);
// Create temporary bitmap
DWORD dwSize = _pitch * _height;
LPBYTE lpData = (LPBYTE)malloc(dwSize*sizeof(BYTE));
// Scale bitmap
DWORD dwDstHorizontalOffset;
DWORD dwDstVerticalOffset = 0;
DWORD dwDstTotalOffset;
LPDWORD lpSrcData = (LPDWORD)m_lpData;
DWORD dwSrcTotalOffset;
LPDWORD lpDstData = (LPDWORD)lpData;
for (long i=0; i<_height; i++)
{
dwDstHorizontalOffset = 0;
for (long j=0; j<_width; j++)
{
// Update destination total offset
dwDstTotalOffset = dwDstVerticalOffset + dwDstHorizontalOffset;
// Update bitmap
fixed f_i = itofx(i);
fixed f_j = itofx(j);
fixed f_a = Mulfx(f_i, f_dy);
fixed f_b = Mulfx(f_j, f_dx);
long m = fxtoi(f_a);
long n = fxtoi(f_b);
fixed f_f = f_a - itofx(m);
fixed f_g = f_b - itofx(n);
dwSrcTotalOffset = m*m_iPitch + n*m_iBpp;
DWORD dwSrcTopLeft = dwSrcTotalOffset;
DWORD dwSrcTopRight = dwSrcTotalOffset + m_iBpp;
if (n >= m_bih.biWidth-1)
dwSrcTopRight = dwSrcTotalOffset;
DWORD dwSrcBottomLeft = dwSrcTotalOffset + m_iPitch;
if (m >= m_bih.biHeight-1)
dwSrcBottomLeft = dwSrcTotalOffset;
DWORD dwSrcBottomRight = dwSrcTotalOffset + m_iPitch + m_iBpp;
if ((n >= m_bih.biWidth-1) || (m >= m_bih.biHeight-1))
dwSrcBottomRight = dwSrcTotalOffset;
fixed f_w1 = Mulfx(f_1-f_f, f_1-f_g);
fixed f_w2 = Mulfx(f_1-f_f, f_g);
fixed f_w3 = Mulfx(f_f, f_1-f_g);
fixed f_w4 = Mulfx(f_f, f_g);
_PIXEL pixel1 = lpSrcData[dwSrcTopLeft>>2];
_PIXEL pixel2 = lpSrcData[dwSrcTopRight>>2];
_PIXEL pixel3 = lpSrcData[dwSrcBottomLeft>>2];
_PIXEL pixel4 = lpSrcData[dwSrcBottomRight>>2];
fixed f_r1 = itofx(_GetRValue(pixel1));
fixed f_r2 = itofx(_GetRValue(pixel2));
fixed f_r3 = itofx(_GetRValue(pixel3));
fixed f_r4 = itofx(_GetRValue(pixel4));
fixed f_g1 = itofx(_GetGValue(pixel1));
fixed f_g2 = itofx(_GetGValue(pixel2));
fixed f_g3 = itofx(_GetGValue(pixel3));
fixed f_g4 = itofx(_GetGValue(pixel4));
fixed f_b1 = itofx(_GetBValue(pixel1));
fixed f_b2 = itofx(_GetBValue(pixel2));
fixed f_b3 = itofx(_GetBValue(pixel3));
fixed f_b4 = itofx(_GetBValue(pixel4));
BYTE red = (BYTE)fxtoi(Mulfx(f_w1, f_r1) + Mulfx(f_w2, f_r2) + Mulfx(f_w3, f_r3) + Mulfx(f_w4, f_r4));
BYTE green = (BYTE)fxtoi(Mulfx(f_w1, f_g1) + Mulfx(f_w2, f_g2) + Mulfx(f_w3, f_g3) + Mulfx(f_w4, f_g4));
BYTE blue = (BYTE)fxtoi(Mulfx(f_w1, f_b1) + Mulfx(f_w2, f_b2) + Mulfx(f_w3, f_b3) + Mulfx(f_w4, f_b4));
lpDstData[dwDstTotalOffset>>2] = _RGB(red, green, blue);
// Update destination horizontal offset
dwDstHorizontalOffset += m_iBpp;
}
// Update destination vertical offset
dwDstVerticalOffset += _pitch;
}
// Update bitmap info
m_iPitch = _pitch;
m_bih.biWidth = _width;
m_bih.biHeight = _height;
free(m_lpData);
m_dwSize = dwSize;
m_lpData = lpData;
}
}
void CBitmapEx::_ScaleBicubic(long horizontalPercent, long verticalPercent)
{
// Check for valid bitmap
if (IsValid())
{
// Calculate scaling params
long _horizontalPercent = max(1, horizontalPercent);
long _verticalPercent = max(1, verticalPercent);
float dx = 100.0f / (float)_horizontalPercent;
float dy = 100.0f / (float)_verticalPercent;
long _width = (long)((1.0f/dx) * (float)m_bih.biWidth + 0.5f);
long _height = (long)((1.0f/dy) * (float)m_bih.biHeight + 0.5f);
long _pitch = m_iBpp * _width;
while ((_pitch & 3) != 0)
_pitch++;
fixed f_dx = ftofx(dx);
fixed f_dy = ftofx(dy);
fixed f_1 = itofx(1);
fixed f_2 = itofx(2);
fixed f_4 = itofx(4);
fixed f_6 = itofx(6);
fixed f_gama = ftofx(1.04f);
// Create temporary bitmap
DWORD dwSize = _pitch * _height;
LPBYTE lpData = (LPBYTE)malloc(dwSize*sizeof(BYTE));
// Scale bitmap
DWORD dwDstHorizontalOffset;
DWORD dwDstVerticalOffset = 0;
DWORD dwDstTotalOffset;
LPDWORD lpSrcData = (LPDWORD)m_lpData;
DWORD dwSrcTotalOffset;
LPDWORD lpDstData = (LPDWORD)lpData;
for (long i=0; i<_height; i++)
{
dwDstHorizontalOffset = 0;
for (long j=0; j<_width; j++)
{
// Update destination total offset
dwDstTotalOffset = dwDstVerticalOffset + dwDstHorizontalOffset;
// Update bitmap
fixed f_i = itofx(i);
fixed f_j = itofx(j);
fixed f_a = Mulfx(f_i, f_dy);
fixed f_b = Mulfx(f_j, f_dx);
long m = fxtoi(f_a);
long n = fxtoi(f_b);
fixed f_f = f_a - itofx(m);
fixed f_g = f_b - itofx(n);
dwSrcTotalOffset = m*m_iPitch + n*m_iBpp;
DWORD dwSrcOffsets[16];
dwSrcOffsets[0] = dwSrcTotalOffset - m_iPitch - m_iBpp;
if ((m < 1) || (n < 1))
dwSrcOffsets[0] = dwSrcTotalOffset;
dwSrcOffsets[1] = dwSrcTotalOffset - m_iPitch;
if (m < 1)
dwSrcOffsets[1] = dwSrcTotalOffset;
dwSrcOffsets[2] = dwSrcTotalOffset - m_iPitch + m_iBpp;
if ((m < 1) || (n >= m_bih.biWidth-1))
dwSrcOffsets[2] = dwSrcTotalOffset;
dwSrcOffsets[3] = dwSrcTotalOffset - m_iPitch + m_iBpp + m_iBpp;
if ((m < 1) || (n >= m_bih.biWidth-2))
dwSrcOffsets[3] = dwSrcTotalOffset;
dwSrcOffsets[4] = dwSrcTotalOffset - m_iBpp;
if (n < 1)
dwSrcOffsets[4] = dwSrcTotalOffset;
dwSrcOffsets[5] = dwSrcTotalOffset;
dwSrcOffsets[6] = dwSrcTotalOffset + m_iBpp;
if (n >= m_bih.biWidth-1)
dwSrcOffsets[6] = dwSrcTotalOffset;
dwSrcOffsets[7] = dwSrcTotalOffset + m_iBpp + m_iBpp;
if (n >= m_bih.biWidth-2)
dwSrcOffsets[7] = dwSrcTotalOffset;
dwSrcOffsets[8] = dwSrcTotalOffset + m_iPitch - m_iBpp;
if ((m >= m_bih.biHeight-1) || (n < 1))
dwSrcOffsets[8] = dwSrcTotalOffset;
dwSrcOffsets[9] = dwSrcTotalOffset + m_iPitch;
if (m >= m_bih.biHeight-1)
dwSrcOffsets[9] = dwSrcTotalOffset;
dwSrcOffsets[10] = dwSrcTotalOffset + m_iPitch + m_iBpp;
if ((m >= m_bih.biHeight-1) || (n >= m_bih.biWidth-1))
dwSrcOffsets[10] = dwSrcTotalOffset;
dwSrcOffsets[11] = dwSrcTotalOffset + m_iPitch + m_iBpp + m_iBpp;
if ((m >= m_bih.biHeight-1) || (n >= m_bih.biWidth-2))
dwSrcOffsets[11] = dwSrcTotalOffset;
dwSrcOffsets[12] = dwSrcTotalOffset + m_iPitch + m_iPitch - m_iBpp;
if ((m >= m_bih.biHeight-2) || (n < 1))
dwSrcOffsets[12] = dwSrcTotalOffset;
dwSrcOffsets[13] = dwSrcTotalOffset + m_iPitch + m_iPitch;
if (m >= m_bih.biHeight-2)
dwSrcOffsets[13] = dwSrcTotalOffset;
dwSrcOffsets[14] = dwSrcTotalOffset + m_iPitch + m_iPitch + m_iBpp;
if ((m >= m_bih.biHeight-2) || (n >= m_bih.biWidth-1))
dwSrcOffsets[14] = dwSrcTotalOffset;
dwSrcOffsets[15] = dwSrcTotalOffset + m_iPitch + m_iPitch + m_iBpp + m_iBpp;
if ((m >= m_bih.biHeight-2) || (n >= m_bih.biWidth-2))
dwSrcOffsets[15] = dwSrcTotalOffset;
fixed f_red=0, f_green=0, f_blue=0;
for (long k=-1; k<3; k++)
{
fixed f = itofx(k)-f_f;
fixed f_fm1 = f - f_1;
fixed f_fp1 = f + f_1;
fixed f_fp2 = f + f_2;
fixed f_a = 0;
if (f_fp2 > 0)
f_a = Mulfx(f_fp2,Mulfx(f_fp2,f_fp2));
fixed f_b = 0;
if (f_fp1 > 0)
f_b = Mulfx(f_fp1,Mulfx(f_fp1,f_fp1));
fixed f_c = 0;
if (f > 0)
f_c = Mulfx(f,Mulfx(f,f));
fixed f_d = 0;
if (f_fm1 > 0)
f_d = Mulfx(f_fm1,Mulfx(f_fm1,f_fm1));
fixed f_RY = Divfx((f_a-Mulfx(f_4,f_b)+Mulfx(f_6,f_c)-Mulfx(f_4,f_d)),f_6);
for (long l=-1; l<3; l++)
{
fixed f = itofx(l)-f_g;
fixed f_fm1 = f - f_1;
fixed f_fp1 = f + f_1;
fixed f_fp2 = f + f_2;
fixed f_a = 0;
if (f_fp2 > 0)
f_a = Mulfx(f_fp2,Mulfx(f_fp2,f_fp2));
fixed f_b = 0;
if (f_fp1 > 0)
f_b = Mulfx(f_fp1,Mulfx(f_fp1,f_fp1));
fixed f_c = 0;
if (f > 0)
f_c = Mulfx(f,Mulfx(f,f));
fixed f_d = 0;
if (f_fm1 > 0)
f_d = Mulfx(f_fm1,Mulfx(f_fm1,f_fm1));
fixed f_RX = Divfx((f_a-Mulfx(f_4,f_b)+Mulfx(f_6,f_c)-Mulfx(f_4,f_d)),f_6);
fixed f_R = Mulfx(f_RY,f_RX);
long _k = ((k+1)*4) + (l+1);
fixed f_rs = itofx(_GetRValue(lpSrcData[dwSrcOffsets[_k]>>2]));
fixed f_gs = itofx(_GetGValue(lpSrcData[dwSrcOffsets[_k]>>2]));
fixed f_bs = itofx(_GetBValue(lpSrcData[dwSrcOffsets[_k]>>2]));
f_red += Mulfx(f_rs,f_R);
f_green += Mulfx(f_gs,f_R);
f_blue += Mulfx(f_bs,f_R);
}
}
BYTE red = (BYTE)max(0, min(255, fxtoi(Mulfx(f_red,f_gama))));
BYTE green = (BYTE)max(0, min(255, fxtoi(Mulfx(f_green,f_gama))));
BYTE blue = (BYTE)max(0, min(255, fxtoi(Mulfx(f_blue,f_gama))));
lpDstData[dwDstTotalOffset>>2] = _RGB(red, green, blue);
// Update destination horizontal offset
dwDstHorizontalOffset += m_iBpp;
}
// Update destination vertical offset
dwDstVerticalOffset += _pitch;
}
// Update bitmap info
m_iPitch = _pitch;
m_bih.biWidth = _width;
m_bih.biHeight = _height;
free(m_lpData);
m_dwSize = dwSize;
m_lpData = lpData;
}
}
void CBitmapEx::Scale(long horizontalPercent, long verticalPercent)
{
// Check for resampling mode
switch (m_ResampleMode)
{
case RM_NEARESTNEIGHBOUR:
{
// Scale bitmap using nearest neighbour interpolation algorithm
_ScaleNearestNeighbour(horizontalPercent, verticalPercent);
}
break;
case RM_BILINEAR:
{
// Scale bitmap using bilinear interpolation algorithm
_ScaleBilinear(horizontalPercent, verticalPercent);
}
break;
case RM_BICUBIC:
{
// Scale bitmap using bicubic interpolation algorithm
_ScaleBicubic(horizontalPercent, verticalPercent);
}
break;
}
}
void CBitmapEx::_ScaleNearestNeighbour2(long width, long height)
{
// Check for valid bitmap
if (IsValid())
{
// Calculate scaling params
long _width = max(1, width);
long _height = max(1, height);
float dx = (float)m_bih.biWidth / (float)_width;
float dy = (float)m_bih.biHeight / (float)_height;
long _pitch = m_iBpp * _width;
while ((_pitch & 3) != 0)
_pitch++;
fixed f_dx = ftofx(dx);
fixed f_dy = ftofx(dy);
// Create temporary bitmap
DWORD dwSize = _pitch * _height;
LPBYTE lpData = (LPBYTE)malloc(dwSize*sizeof(BYTE));
// Scale bitmap
DWORD dwDstHorizontalOffset;
DWORD dwDstVerticalOffset = 0;
DWORD dwDstTotalOffset;
LPDWORD lpSrcData = (LPDWORD)m_lpData;
DWORD dwSrcTotalOffset;
LPDWORD lpDstData = (LPDWORD)lpData;
for (long i=0; i<_height; i++)
{
dwDstHorizontalOffset = 0;
for (long j=0; j<_width; j++)
{
// Update destination total offset
dwDstTotalOffset = dwDstVerticalOffset + dwDstHorizontalOffset;
// Update bitmap
fixed f_i = itofx(i);
fixed f_j = itofx(j);
fixed f_a = Mulfx(f_i, f_dy);
fixed f_b = Mulfx(f_j, f_dx);
long m = fxtoi(f_a);
long n = fxtoi(f_b);
dwSrcTotalOffset = m*m_iPitch + n*m_iBpp;
lpDstData[dwDstTotalOffset>>2] = lpSrcData[dwSrcTotalOffset>>2];