Text drawing function with SDL_ttf.

[Falco Girgis]

I made this function to use with the Null level editor. It works quite well and I hope you can use it also.

Code: Select all

#define C_ALIGN -1
#define R_ALIGN -2
#define L_ALIGN -3
#define B_ALIGN -2
#define T_ALIGN -3

void DrawText(char *text, int x, int y, Uint8 r, Uint8 g, Uint8 b) {
	SDL_Color color;
	color.r = r;
	color.g = g;
	color.b = b;

	SDL_Surface *g_pTextSurface = TTF_RenderText_Blended(g_Font, text, color);

	//rectangles
	SDL_Rect rcSrc;
	SDL_Rect rcDst;

	//source rectangle
	rcSrc.x = 0;
	rcSrc.y = 0;
	rcSrc.w = g_pTextSurface->w;
	rcSrc.h = g_pTextSurface->h;

	//destination rectangle
	rcDst = rcSrc;
	
	if(x == C_ALIGN) rcDst.x = (SCREEN_WIDTH-rcDst.w)/2;
	else if(x == R_ALIGN) rcDst.x = SCREEN_WIDTH - rcDst.w;
	else if(x == L_ALIGN) rcDst.x = 0;
	else rcDst.x = x;
	
	if(y == C_ALIGN) rcDst.y = (SCREEN_HEIGHT - rcDst.h)/2;
	else if(y == B_ALIGN) rcDst.y = SCREEN_HEIGHT - rcDst.h;
	else if(y == T_ALIGN) rcDst.y = 0;
	else rcDst.y = y;

	//blit the surface
	SDL_BlitSurface(g_pTextSurface, &rcSrc, g_pMainSurface, &rcDst);
}

It requires that you have g_pTextSurface and g_pMainSurface surfaces for the text to be blitted from and the MainSurface for it to be displayed on.

Parameter one is just a string with whatever you want it to print to the screen.

Then the x and y coordinates of where you want it (pass one of the #defined constants for auto-alignage).

Then you have your R, G, B.

The function takes care of the rest. Here is an example of a sample function call:

Code: Select all

DrawText("Null Level Editor: Beta Versionz0rz", C_ALIGN, 10, 0, 50, 255);

Enjoy.

[JS Lemming]

Koo dat.