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Rotacje do wyświetlania terenu

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This commit is contained in:
mateuszb 2007-06-06 18:26:28 +00:00
parent 1c4c8a1e18
commit a74637699a
2 changed files with 117 additions and 0 deletions
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103
SDL_Extensions.cpp Normal file
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#include "stdafx.h"
#include "SDL_Extensions.h"
void CSDL_Ext::SDL_PutPixel(SDL_Surface *ekran, int x, int y, Uint8 R, Uint8 G, Uint8 B)
{
Uint8 *p = (Uint8 *)ekran->pixels + y * ekran->pitch + x * ekran->format->BytesPerPixel;
if(SDL_BYTEORDER == SDL_BIG_ENDIAN)
{
p[0] = R;
p[1] = G;
p[2] = B;
}
else
{
p[0] = B;
p[1] = G;
p[2] = R;
}
SDL_UpdateRect(ekran, x, y, 1, 1);
}
///**************/
///Reverses the toRot surface by the vertical axis
///**************/
SDL_Surface * CSDL_Ext::rotate01(SDL_Surface * toRot)
{
SDL_Surface * first = SDL_CreateRGBSurface(toRot->flags, toRot->w, toRot->h, toRot->format->BitsPerPixel, toRot->format->Rmask, toRot->format->Gmask, toRot->format->Bmask, toRot->format->Amask);
SDL_Surface * ret = SDL_ConvertSurface(first, toRot->format, toRot->flags);
for(int i=0; i<ret->w; ++i)
{
for(int j=0; j<ret->h; ++j)
{
{
Uint8 *p = (Uint8 *)toRot->pixels + j * toRot->pitch + (ret->w - i - 1) * toRot->format->BytesPerPixel;
if(SDL_BYTEORDER == SDL_BIG_ENDIAN)
{
SDL_PutPixel(ret, i, j, p[0], p[1], p[2]);
}
else
{
SDL_PutPixel(ret, i, j, p[2], p[1], p[0]);
}
}
}
}
SDL_FreeSurface(first);
return ret;
}
///**************/
///Rotates toRot surface by 90 degrees left
///**************/
SDL_Surface * CSDL_Ext::rotate02(SDL_Surface * toRot)
{
SDL_Surface * first = SDL_CreateRGBSurface(toRot->flags, toRot->h, toRot->w, toRot->format->BitsPerPixel, toRot->format->Rmask, toRot->format->Gmask, toRot->format->Bmask, toRot->format->Amask);
SDL_Surface * ret = SDL_ConvertSurface(first, toRot->format, toRot->flags);
for(int i=0; i<ret->w; ++i)
{
for(int j=0; j<ret->h; ++j)
{
{
Uint8 *p = (Uint8 *)toRot->pixels + i * toRot->pitch + j * toRot->format->BytesPerPixel;
if(SDL_BYTEORDER == SDL_BIG_ENDIAN)
{
SDL_PutPixel(ret, i, j, p[0], p[1], p[2]);
}
else
{
SDL_PutPixel(ret, i, j, p[2], p[1], p[0]);
}
}
}
}
SDL_FreeSurface(first);
return ret;
}
///*************/
///Rotates toRot surface by 180 degrees
///*************/
SDL_Surface * CSDL_Ext::rotate03(SDL_Surface * toRot)
{
SDL_Surface * first = SDL_CreateRGBSurface(toRot->flags, toRot->w, toRot->h, toRot->format->BitsPerPixel, toRot->format->Rmask, toRot->format->Gmask, toRot->format->Bmask, toRot->format->Amask);
SDL_Surface * ret = SDL_ConvertSurface(first, toRot->format, toRot->flags);
for(int i=0; i<ret->w; ++i)
{
for(int j=0; j<ret->h; ++j)
{
{
Uint8 *p = (Uint8 *)toRot->pixels + (ret->h - j - 1) * toRot->pitch + (ret->w - i - 1) * toRot->format->BytesPerPixel;
if(SDL_BYTEORDER == SDL_BIG_ENDIAN)
{
SDL_PutPixel(ret, i, j, p[0], p[1], p[2]);
}
else
{
SDL_PutPixel(ret, i, j, p[2], p[1], p[0]);
}
}
}
}
SDL_FreeSurface(first);
return ret;
}

14
SDL_Extensions.h Normal file
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#ifndef SDL_EXTENSIONS_H
#define SDL_EXTENSIONS_H
#include "SDL.h"
class CSDL_Ext
{
public:
static void SDL_PutPixel(SDL_Surface *ekran, int x, int y, Uint8 R, Uint8 G, Uint8 B);
static SDL_Surface * rotate01(SDL_Surface * toRot);
static SDL_Surface * rotate02(SDL_Surface * toRot);
static SDL_Surface * rotate03(SDL_Surface * toRot);
};
#endif // SDL_EXTENSIONS_H