/*
- * File: pngread.h
- * Purpose: PNG file reader
- * Author: Alejandro Aguilar Sierra/Julian Smart
- * Created: 1995
- * Copyright: (c) 1995, Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
+ * File: pngread.h
+ * Purpose: PNG file reader
+ * Author: Alejandro Aguilar Sierra/Julian Smart
+ * Created: 1995
+ * Copyright: (c) 1995, Alejandro Aguilar Sierra <asierra@servidor.unam.mx>
*
*
*/
#ifndef _WX_PNGREAD__
#define _WX_PNGREAD__
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma interface "pngread.h"
#endif
typedef struct
{
- byte red;
- byte green;
+ byte red;
+ byte green;
byte blue;
} rgb_color_struct;
-#define COLORTYPE_PALETTE 1
-#define COLORTYPE_COLOR 2
-#define COLORTYPE_ALPHA 4
+#define COLORTYPE_PALETTE 1
+#define COLORTYPE_COLOR 2
+#define COLORTYPE_ALPHA 4
class wxPNGReader
{
protected:
int filetype;
char filename[255];
- ImagePointerType RawImage; // Image data
+ ImagePointerType RawImage; // Image data
- int Width, Height; // Dimensions
- int Depth; // (bits x pixel)
- int ColorType; // Bit 1 = Palette used
- // Bit 2 = Color used
- // Bit 3 = Alpha used
+ int Width, Height; // Dimensions
+ int Depth; // (bits x pixel)
+ int ColorType; // Bit 1 = Palette used
+ // Bit 2 = Color used
+ // Bit 3 = Alpha used
- long EfeWidth; // Efective Width
+ long EfeWidth; // Efective Width
- GWorldPtr lpbi;
+ void *lpbi;
int bgindex;
- wxPalette* Palette;
+ wxPalette* m_palette;
bool imageOK;
friend class wxPNGReaderIter;
public:
bool SetPalette(wxPalette* colourmap);
bool SetPalette(int n, rgb_color_struct *rgb_struct);
bool SetPalette(int n, byte *r, byte *g=0, byte *b=0);
- wxPalette* GetPalette() const { return Palette; }
+ wxPalette* GetPalette() const { return m_palette; }
void NullData();
inline int GetBGIndex(void) { return bgindex; }
class wxPNGReaderIter
{
protected:
- int Itx, Ity; // Counters
+ int Itx, Ity; // Counters
int Stepx, Stepy;
- ImagePointerType IterImage; // Image pointer
+ ImagePointerType IterImage; // Image pointer
wxPNGReader *ima;
public:
// Constructors
wxPNGReaderIter::wxPNGReaderIter(wxPNGReader *imax): ima(imax)
{
if (ima)
- IterImage = ima->RawImage;
+ IterImage = ima->RawImage;
Itx = Ity = 0;
Stepx = Stepy = 0;
}
bool wxPNGReaderIter::ItOK ()
{
if (ima)
- return ima->Inside(Itx, Ity);
+ return ima->Inside(Itx, Ity);
else
- return FALSE;
+ return FALSE;
}
// Here should be bcopy or memcpy
//_fmemcpy(IterImage, (void far *)buf, n);
if (n<0)
- n = ima->GetWidth();
+ n = ima->GetWidth();
for (int i=0; i<n; i++) IterImage[i] = buf[i];
}
inline bool wxPNGReaderIter::NextByte()
{
if (++Itx < ima->EfeWidth)
- return 1;
+ return 1;
else
- if (++Ity < ima->Height)
- {
- IterImage += ima->EfeWidth;
- Itx = 0;
- return 1;
- } else
- return 0;
+ if (++Ity < ima->Height)
+ {
+ IterImage += ima->EfeWidth;
+ Itx = 0;
+ return 1;
+ } else
+ return 0;
}
inline bool wxPNGReaderIter::PrevByte()
{
if (--Itx >= 0)
- return 1;
+ return 1;
else
- if (--Ity >= 0)
- {
- IterImage -= ima->EfeWidth;
- Itx = 0;
- return 1;
- } else
- return 0;
+ if (--Ity >= 0)
+ {
+ IterImage -= ima->EfeWidth;
+ Itx = 0;
+ return 1;
+ } else
+ return 0;
}
inline bool wxPNGReaderIter::NextStep()
{
Itx += Stepx;
if (Itx < ima->EfeWidth)
- return 1;
+ return 1;
else {
- Ity += Stepy;
- if (Ity < ima->Height)
- {
- IterImage += ima->EfeWidth;
- Itx = 0;
- return 1;
- } else
- return 0;
+ Ity += Stepy;
+ if (Ity < ima->Height)
+ {
+ IterImage += ima->EfeWidth;
+ Itx = 0;
+ return 1;
+ } else
+ return 0;
}
}
{
Itx -= Stepx;
if (Itx >= 0)
- return 1;
- else {
- Ity -= Stepy;
- if (Ity >= 0 && Ity < ima->Height)
- {
- IterImage -= ima->EfeWidth;
- Itx = 0;
- return 1;
- } else
- return 0;
+ return 1;
+ else {
+ Ity -= Stepy;
+ if (Ity >= 0 && Ity < ima->Height)
+ {
+ IterImage -= ima->EfeWidth;
+ Itx = 0;
+ return 1;
+ } else
+ return 0;
}
}