initial draw code

2024-10-08 15:21:18 -04:00
parent 5a4e1699b3
commit dd8474ccac
5 changed files with 200 additions and 1 deletions
--- a/modules/Console_Render/draw.jai
+++ b/modules/Console_Render/draw.jai
@@ -0,0 +1,104 @@
+draw :: (screen: *Screen, x: s64, y: s64, char: PIXEL_TYPE = .PIXEL_SOLID, color: COLOR = .FG_WHITE) {
+    using screen;
+
+    if x >= 0 && x < width && y >= 0 && y < height {
+        buffer[y * width + x].type  = char;
+        buffer[y * width + x].color = color;
+    }
+}
+
+draw_line :: (screen: *Screen, x1: s64, y1: s64, x2: s64, y2: s64, char: PIXEL_TYPE = .PIXEL_SOLID, color: COLOR = .FG_WHITE) {
+    x, y, dx, dy, dx1, dy1, xe, ye, px, py : s64;
+
+    dx = x2 - x1;
+    dy = y2 - y1;
+
+    dx1 = abs(dx);
+    dy1 = abs(dy);
+
+    px = 2 * dy1 - dx1;
+    py = 2 * dx1 - dy1;
+
+    if dy1 <= dx1 {
+        if dx >= 0 {
+            x  = x1;
+            y  = y1;
+            xe = x2;
+        } else {
+            x  = x2;
+            y  = y2;
+            xe = x1;
+        }
+
+        draw(screen, x, y, char, color);
+
+        for 0..xe {
+            x += 1;
+
+            if px < 0 {
+                px += 2 * dy1;
+            } else {
+                if (dx < 0 && dy < 0) || (dx > 0 && dy > 0) then y += 1; else y -= 1;
+                px += 2 * (dy1 - dx1);
+
+                draw(screen, x, y, char, color);
+            }
+        }
+    } else {
+        if dy >= 0 {
+            x  = x1;
+            y  = y1;
+            ye = y2;
+        } else {
+            x  = x2;
+            y  = y2;
+            ye = y1;
+        }
+
+        draw(screen, x, y, char, color);
+
+        for 0..ye {
+            y += 1;
+
+            if py <= 0 {
+                py += 2 * dx1;
+            } else {
+                if (dx < 0 && dy < 0 ) || (dx > 0 && dy > 0) then x += 1; else x -= 1;
+                py += 2 * (dx1 - dy1);
+            }
+
+            draw(screen, x, y, char, color);
+        }
+    }
+}
+
+draw_triangle :: (screen: *Screen, x1: s64, y1: s64, x2: s64, y2: s64, x3: s64, y3: s64, char: PIXEL_TYPE = .PIXEL_SOLID, color: COLOR = .FG_WHITE) {
+    draw_line(x1, y1, x2, y2, char, color);
+    draw_line(x2, y2, x3, y3, char, color);
+    draw_line(x3, y3, x1, y1, char, color);
+}
+
+clip :: (screen: *Screen, x: *s64, y: *s64) {
+    using screen;
+
+    if x < 0 then x = 0;
+    if x >= width then x = width;
+    if y < 0 then y = 0;
+    if y >= height then y = height;
+}
+
+fill :: (screen: *Screen, x1: s64, y1: s64, x2: s64, y2: s64, char: PIXEL_TYPE = .PIXEL_SOLID, color: COLOR = .FG_WHITE) {
+    clip(screen, *x1, *y1);
+    clip(screen, *x2, *y2);
+
+    for x: x1..x2 {
+        for y: y1..y2 {
+            draw(x, y, char, color);
+        }
+    }
+}
+
+
+draw_string :: (screen: *Screen, x: s64, y: s64, text: string, c: COLOR = .FG_WHITE) {
+    assert(false, "not implemented");
+}