Martin Johnson
Demo of low res colour vga video for stm32f3 discovery board
Dependencies: STM32F3-Discovery-minimal
Fork of
Space_Invaders_Demo
by 
Martin Johnson
Diff: gdi.c
- Revision:
- 5:594c9712697c
- Parent:
- 3:93e488fbb8a2
- Child:
- 8:34fb94209517
- Child:
- 14:3035b3271395
--- a/gdi.c Wed May 16 02:48:27 2018 +0000
+++ b/gdi.c Thu May 17 00:59:01 2018 +0000
@@ -286,7 +286,7 @@
if (x >= VID_PIXELS_X || y >= VID_PIXELS_Y) return;
w = x;// >> 3;
- r = x - (w << 3);
+ //r = x - (w << 3);
// Prepare mask
@@ -439,6 +439,19 @@
}
}
+void gdiHLine(u16 x, u16 y, u16 x1, u16 rop) {
+ if(x>x1) {
+ int t=x1;
+ x1=x;
+ x=t;
+ }
+ char *start=fb[y]+x;
+ int n=x1-x+1;
+ while(n--) {
+ *start++|=(colour<<4);
+ }
+}
+
void gdiFilledCircle(u16 x, u16 y, u16 r, u16 rop) {
i32 x1, y1;
@@ -450,8 +463,9 @@
for (a = 0; a < 100; a+=div) {
x1 = r * mthCos(a);
y1 = r * mthSin(a);
- gdiLine(NULL, (x1 / 10000) + x,(y1 / 10000) + y,-(x1 / 10000) + x,(y1 / 10000) + y,rop);
- gdiLine(NULL, (x1 / 10000) + x,-(y1 / 10000) + y,-(x1 / 10000) + x,-(y1 / 10000) + y,rop);
+ gdiHLine( (x1 / 10000) + x,(y1 / 10000) + y,-(x1 / 10000) + x,rop);
+ gdiHLine( (x1 / 10000) + x,-(y1 / 10000) + y,-(x1 / 10000) + x,rop);
+// gdiPoint(NULL, (x1 / 10000) + x,(y1 / 10000) + y,rop);
}
}
//*****************************************************************************