olemorud/cgraphics
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

small changes

Browse Source
This commit is contained in:
Ole Morud
2022-06-06 23:05:03 +02:00
parent 0eb822094b
commit 0f6e256856
1 changed files with 7 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
graphics.c
View File

@@ -5,7 +5,7 @@
#define uint unsigned int #define uint unsigned int
#define ON 'x' #define ON 'x'
#define OFF '-' #define OFF '.'
typedef struct Canvas { typedef struct Canvas {
int x; int x;
@@ -25,13 +25,14 @@ void dot(Canvas* c, uint x, uint y);
* main * main
*/ */
int main(){ int main(){
Canvas a = {40, 40, malloc(40*40)}; char *data = malloc(1600);
Canvas a = {40, 40, data};
memset(a.data, OFF, a.x * a.y); memset(a.data, OFF, a.x * a.y);
//line(&a, 1, 1, 8, 8); //line(&a, 1, 1, 8, 8);
//line(&a, 8, 8, 1, 1); //line(&a, 8, 8, 1, 1);
//line(&a, 0, 5, 8, 8); //line(&a, 0, 5, 8, 8);
line(&a, 8, 8, 0, 5); line(&a, 8, 8, 35, 39);
render(&a); render(&a);
@@ -56,6 +57,7 @@ void render(Canvas* c){
} }
} }
/* /*
* Sets pixel at x,y to ON * Sets pixel at x,y to ON
*/ */
@@ -63,8 +65,10 @@ void dot(Canvas* c, uint x, uint y){
c->data[ y*(c->x) + x] = ON; c->data[ y*(c->x) + x] = ON;
} }
/* /*
* Draws a line from (start_x, start_y) to (end_x, end_y) * Draws a line from (start_x, start_y) to (end_x, end_y)
* This is the naive line drawing algorithm and is sub-optimal due to the use of floating point calculations
*/ */
void line(Canvas* c, uint start_x, uint start_y, uint end_x, uint end_y){ void line(Canvas* c, uint start_x, uint start_y, uint end_x, uint end_y){
int dx = end_x - start_x; int dx = end_x - start_x;