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#include <SDL.h>
#include <SDL/SDL.h>
#include <SDL/SDL_image.h>
#include "SDL/SDL_image.h"
#include <SDL/SDL_thread.h>
#include <math.h>
#include "draw.h"
void DrawPixel(SDL_Surface *screen, int x, int y, Uint32 color){
//this only works for 16bpp screens
//are we outside the screen?????
//If we are bail out now before it's too late!
if (x > 1023 || x < 0 || y > 759 || y < 0) {
return;
}
//place the pixel on the screen
Uint16 *pixel_location;
pixel_location = (Uint16 *)screen->pixels + y*screen->pitch/2 + x;
*pixel_location = color;
}
void DrawLine(SDL_Surface *screen, int X1, int Y1, int X2, int Y2, Uint32 Color){
//don't even ask me about this stuff All I know is it works
//and thats ALL I care about...
int dx,dy,sdx,sdy,py,px,x,y;
dx = X2 - X1;
dy = Y2 - Y1;
if (dx < 0) sdx = -1;
else sdx = 1;
if (dy < 0) sdy = -1;
else sdy = 1;
dx = sdx * dx + 1;
dy = sdy * dy + 1;
x = 0;
y = 0;
px = X1;
py = Y1;
if (dx >= dy){
for (int x = 0; x < dx; x++){
DrawPixel(screen, px, py, Color);
y = y + dy;
if (y >= dx){
y = y - dx;
py = py + sdy;
}
px = px + sdx;
}
}else{
for (int y = 0; y < dy; y++){
DrawPixel(screen, px, py, Color);
x = x + dx;
if (x >= dy){
x = x - dy;
px = px + sdx;
}
py = py + sdy;
}
}
}
void DrawArc(SDL_Surface *screen, int X1, int Y1, int Radius, int Theta1, int Theta2, Uint32 Color){
//Draw an arc at (X1,Y1) of a given radius from theta1 to theta2 using specified Color.
int x, y, xc, yc, radius;
int theta, theta1, theta2;
xc = X1;
yc = Y1;
radius = Radius;
theta1 = Theta1;
theta2 = Theta2;
for(theta=theta1;theta<=theta2;theta+=5) {
x = xc + int(radius*cos(theta*3.14/180.0));
y = yc - int(radius*sin(theta*3.14/180.0));
DrawPixel(screen, x, y, Color);
}
}
void DrawCircle(SDL_Surface *screen, int X1, int Y1, int Radius, Uint32 Color){
//Draw a circle at (X1,Y1) of a given radius using specified Color.
/*
int xc, yc, radius;
xc = X1;
yc = Y1;
radius = Radius;
*/
DrawArc(screen, X1, Y1, Radius, 0, 360, Color);
}
void FillCircle(SDL_Surface *screen, int X1, int Y1, int Radius, Uint32 Color)
{
int my_radius;
my_radius = Radius;
while (my_radius > 1)
{
DrawCircle(screen, X1, Y1, my_radius, Color);
my_radius--;
}
}
void DrawDiamond(SDL_Surface *screen, int X1, int Y1, int Size, char Direction, Uint32 Color){
//Draw a diamond at (X1,Y1) of Size using specified Color.
// Direction: T = Top, B = Bottom, F = Full
int xc, yc;
int size;
xc = X1;
yc = Y1;
size = Size;
switch(Direction){
case 'B':
DrawLine(screen, xc-size, yc, xc, yc+size, Color); //bottomleft
DrawLine(screen, xc+size, yc, xc, yc+size, Color); //bottomright
break;
case 'T':
DrawLine(screen, xc, yc-size, xc-size, yc, Color); //topleft
DrawLine(screen, xc, yc-size, xc+size, yc, Color); //topright
break;
default:
DrawLine(screen, xc-size, yc, xc, yc+size, Color); //bottomleft
DrawLine(screen, xc+size, yc, xc, yc+size, Color); //bottomright
DrawLine(screen, xc, yc-size, xc-size, yc, Color); //topleft
DrawLine(screen, xc, yc-size, xc+size, yc, Color); //topright
}
}
void DrawBox(SDL_Surface *screen, int X1, int Y1, int Size, char Direction, Uint32 Color){
//Draw a Box at (X1,Y1) of Size using specified Color.
// Direction: T = Top, B = Bottom, F = Full
int xc, yc;
int size;
char direction;
xc = X1;
yc = Y1;
size = Size;
direction = Direction;
switch(direction){
case 'T':
DrawLine(screen, xc-size, yc-size, xc-size, yc, Color);
DrawLine(screen, xc-size, yc-size, xc+size, yc-size, Color);
DrawLine(screen, xc+size, yc-size, xc+size, yc, Color);
break;
case 'B':
DrawLine(screen, xc-size, yc, xc-size, yc+size, Color);
DrawLine(screen, xc-size, yc+size, xc+size, yc+size, Color);
DrawLine(screen, xc+size, yc, xc+size, yc+size, Color);
break;
default:
DrawLine(screen, xc-size, yc-size, xc+size, yc-size, Color);
DrawLine(screen, xc+size, yc-size, xc+size, yc+size, Color);
DrawLine(screen, xc-size, yc-size, xc-size, yc+size, Color);
DrawLine(screen, xc-size, yc+size, xc+size, yc+size, Color);
}
}
void DrawRectangle(SDL_Surface *screen, int x1, int y1, int x2, int y2, Uint32 color)
{
DrawLine(screen, x1, y1, x1, y2, color);
DrawLine(screen, x1, y1, x2, y1, color);
DrawLine(screen, x1, y2, x2, y2, color);
DrawLine(screen, x2, y1, x2, y2, color);
}
void FillRectangle(SDL_Surface *screen, int x1, int y1, int x2, int y2, Uint32 color)
{
int x, y;
for (y = y1; y <= y2; y++)
{
for (x = x1; x <= x2; x++)
{
DrawPixel(screen, x, y, color);
}
}
}
void DrawCross(SDL_Surface *screen, int X1, int Y1, int Size, char Direction, Uint32 Color){
//Draw a Cross at (X1,Y1) of Size using specified Color.
// Direction: T = Top, B = Bottom, F = Full
int xc, yc;
int size;
char direction;
xc = X1;
yc = Y1;
size = Size;
direction = Direction;
switch(direction){
case 'T':
DrawLine(screen, xc-size, yc-size/2, xc-size, yc, Color);
DrawLine(screen, xc+size, yc-size/2, xc+size, yc, Color);
DrawLine(screen, xc-size/2, yc-size, xc+size/2, yc-size, Color);
DrawLine(screen, xc-size/2, yc-size, xc-size/2, yc-size/2, Color);
DrawLine(screen, xc+size/2, yc-size, xc+size/2, yc-size/2, Color);
DrawLine(screen, xc+size/2, yc-size/2, xc+size, yc-size/2, Color);
DrawLine(screen, xc-size, yc-size/2, xc-size/2, yc-size/2, Color);
break;
case 'B':
DrawLine(screen, xc-size, yc, xc-size, yc+size/2, Color);
DrawLine(screen, xc+size, yc, xc+size, yc+size/2, Color);
DrawLine(screen, xc-size/2, yc+size, xc+size/2, yc+size, Color);
DrawLine(screen, xc-size/2, yc+size/2, xc-size/2, yc+size, Color);
DrawLine(screen, xc+size/2, yc+size/2, xc+size/2, yc+size, Color);
DrawLine(screen, xc-size, yc+size/2, xc-size/2, yc+size/2, Color);
DrawLine(screen, xc+size/2, yc+size/2, xc+size, yc+size/2, Color);
break;
default:
DrawLine(screen, xc-size, yc-size/2, xc-size, yc+size/2, Color);
DrawLine(screen, xc+size, yc-size/2, xc+size, yc+size/2, Color);
DrawLine(screen, xc-size/2, yc-size, xc+size/2, yc-size, Color);
DrawLine(screen, xc-size/2, yc+size, xc+size/2, yc+size, Color);
DrawLine(screen, xc-size/2, yc-size, xc-size/2, yc-size/2, Color);
DrawLine(screen, xc-size/2, yc+size/2, xc-size/2, yc+size, Color);
DrawLine(screen, xc+size/2, yc-size, xc+size/2, yc-size/2, Color);
DrawLine(screen, xc+size/2, yc+size/2, xc+size/2, yc+size, Color);
DrawLine(screen, xc-size, yc+size/2, xc-size/2, yc+size/2, Color);
DrawLine(screen, xc+size/2, yc-size/2, xc+size, yc-size/2, Color);
DrawLine(screen, xc-size, yc-size/2, xc-size/2, yc-size/2, Color);
DrawLine(screen, xc+size/2, yc+size/2, xc+size, yc+size/2, Color);
}
}
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