alloc on write paging, -O3 compile works, 'volatile' is the story of my life

1 files changed, 18 insertions, 11 deletions

diff --git a/src/screen.c b/src/screen.c
index 6f682ae..609797c 100644
--- a/src/screen.c
+++ b/src/screen.c
@@ -20,7 +20,7 @@ struct hsv {
 	uint16_t v;
 };
 
-static uint32_t *buffer = NULL;
+static volatile uint32_t *buffer = NULL;
 static uint32_t width, height;
 static uint8_t bit_depth;
 
@@ -39,7 +39,12 @@ static float fabs(float f) {
 	return f > 0 ? f : -f;
 }
 
-static struct rgb htor(struct hsv hsv) {
+static struct rgb gethsv(uint16_t a, uint16_t xp, uint16_t yp) {
+	struct hsv hsv = {
+		.h = a,
+		.s = xp * 100.0 / width,
+		.v = (height - yp) * 100.0 / height,
+	};
 	struct rgb rgb;
 	float s = hsv.s / 100.0;
 	float v = hsv.v / 100.0;
@@ -69,14 +74,16 @@ static struct rgb htor(struct hsv hsv) {
 	return rgb;
 }
 
-static struct rgb get_color(uint16_t a, uint16_t x, uint16_t y) {
-	struct hsv hsv = {
-		.h = a,
-		.s = x * 100.0 / width,
-		.v = y * 100.0 / height,
-	};
-	return htor(hsv);
-}
+//static struct rgb getsrgb(uint16_t x, uint16_t y) {
+//	struct rgb color;// = get_color(angle, x, height - y);
+//	double _x = (double) x / width;
+//	double _y = (double) y / height;
+//	double _z = (2 - _x - _y) / 2;
+//	color.r = _x * 255;
+//	color.g = _y * 255;
+//	color.b = _z * 255;
+//	return color;
+//}
 
 void screen_init(void) {
 	angle = 0;
@@ -89,7 +96,7 @@ void screen_init(void) {
 void screen_redraw(void) {
 	for (uint16_t y = 0; y < height; y++) {
 		for (uint16_t x = 0; x < width; x++) {
-			struct rgb color = get_color(angle, x, height - y);
+			struct rgb color = gethsv(angle, x, y);
 			set_pixel(color, x, y);
 		}
 	}