Rotacje do wyświetlania terenu

SDL_Extensions.cpp

@@ -0,0 +1,103 @@
+#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;
+}

SDL_Extensions.h

@@ -0,0 +1,14 @@
+#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