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#include "lc_global.h"
#include "image.h"
#include "lc_file.h"
static void CopyFromQImage(const QImage& Src, Image& Dest)
{
bool Alpha = Src.hasAlphaChannel();
Dest.Allocate(Src.width(), Src.height(), Alpha ? LC_PIXEL_FORMAT_R8G8B8A8 : LC_PIXEL_FORMAT_R8G8B8);
quint8* Bytes = (quint8*)Dest.mData;
for (int y = 0; y < Dest.mHeight; y++)
{
for (int x = 0; x < Dest.mWidth; x++)
{
QRgb Pixel = Src.pixel(x, y);
*Bytes++ = qRed(Pixel);
*Bytes++ = qGreen(Pixel);
*Bytes++ = qBlue(Pixel);
if (Alpha)
*Bytes++ = qAlpha(Pixel);
}
}
}
Image::Image()
{
mData = nullptr;
mWidth = 0;
mHeight = 0;
mFormat = LC_PIXEL_FORMAT_INVALID;
}
Image::~Image()
{
FreeData();
}
int Image::GetBPP() const
{
switch (mFormat)
{
case LC_PIXEL_FORMAT_INVALID:
return 0;
case LC_PIXEL_FORMAT_A8:
return 1;
case LC_PIXEL_FORMAT_L8A8:
return 2;
case LC_PIXEL_FORMAT_R8G8B8:
return 3;
case LC_PIXEL_FORMAT_R8G8B8A8:
return 4;
}
return 0;
}
bool Image::HasAlpha() const
{
switch (mFormat)
{
case LC_PIXEL_FORMAT_INVALID:
return false;
case LC_PIXEL_FORMAT_A8:
return true;
case LC_PIXEL_FORMAT_L8A8:
return true;
case LC_PIXEL_FORMAT_R8G8B8:
return false;
case LC_PIXEL_FORMAT_R8G8B8A8:
return true;
}
return 0;
}
void Image::FreeData()
{
free(mData);
mData = nullptr;
mWidth = 0;
mHeight = 0;
mFormat = LC_PIXEL_FORMAT_INVALID;
}
void Image::Allocate(int Width, int Height, lcPixelFormat Format)
{
FreeData();
mWidth = Width;
mHeight = Height;
mFormat = Format;
mData = (unsigned char*)malloc(mWidth * mHeight * GetBPP());
}
void Image::ResizePow2()
{
int i, shifted_x, shifted_y;
shifted_x = mWidth;
for (i = 0; ((i < 16) && (shifted_x != 0)); i++)
shifted_x = shifted_x >> 1;
shifted_x = (i != 0) ? 1 << (i-1) : 1;
shifted_y = mHeight;
for (i = 0; ((i < 16) && (shifted_y != 0)); i++)
shifted_y = shifted_y >> 1;
shifted_y = (i != 0) ? 1 << (i-1) : 1;
if ((shifted_x != mWidth) || (shifted_y != mHeight))
Resize (shifted_x, shifted_y);
}
void Image::Resize(int width, int height)
{
int i, j, k, components, stx, sty;
float accumx, accumy;
unsigned char* bits = nullptr;
components = GetBPP();
int BufferSize = width * height * components;
if (BufferSize)
{
bits = (unsigned char*)malloc(BufferSize);
if (bits)
{
for (j = 0; j < mHeight; j++)
{
accumy = (float)height*j / (float)mHeight;
sty = (int)floor(accumy);
for (i = 0; i < mWidth; i++)
{
accumx = (float)width*i / (float)mWidth;
stx = (int)floor(accumx);
for (k = 0; k < components; k++)
bits[(stx + sty*width)*components + k] = mData[(i + j * mWidth) * components + k];
}
}
}
}
free(mData);
mData = bits;
mWidth = width;
mHeight = height;
}
bool Image::FileLoad(lcMemFile& File)
{
QImage Image;
unsigned char* Buffer = File.mBuffer + File.mPosition;
size_t BufferLength = File.mFileSize - File.mPosition;
if (!Image.loadFromData(Buffer, (int)BufferLength))
return false;
CopyFromQImage(Image, *this);
return true;
}
bool Image::FileLoad(const QString& FileName)
{
QImage Image;
if (!Image.load(FileName))
return false;
CopyFromQImage(Image, *this);
return true;
}
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