ntrop

commit 32acf8e0eec26560c3025a3a503428b2e5f5c9af
parent 041d3dd55e0d7d5a0f01a15b1bcfc3e63a70b661
Author: Louis Burda <quent.burda@gmail.com>
Date:   Sun, 12 Feb 2023 05:00:41 +0100

Use texture instead of DrawPixel

Diffstat:
M
ntrop.c
 | 
50
+++++++++++++++++++++++++++++++++++++-------------

1 file changed, 37 insertions(+), 13 deletions(-)
diff --git a/ntrop.c b/ntrop.c
@@ -156,6 +156,7 @@ void
 vis(void)
 {
 	Color *data_colors;
+	Image window_image;
 	size_t pos, len;
 	double mouse_move;
 	size_t data_x, data_y;
@@ -178,6 +179,7 @@ vis(void)
 	window_height = 600;
 	InitWindow(window_width, window_height, window_title);
 
+	window_image = GenImageColor(window_width, window_height, (Color) { 0 });
 	data_width = window_width / 2;
 	data_height = data_len / data_width + !!(data_len % data_width);
 	zoom_x = 0;
@@ -196,6 +198,7 @@ vis(void)
 			data_height = data_len / data_width + !!(data_len % data_width);
 			zoom_x = (data_width - window_width / zoom) / 2.F;
 			zoom_y = (data_height - window_height / zoom) / 2.F;
+			ImageResize(&window_image, window_width, window_height);
 		}
 
 		mouse_x = MIN(MAX(0, GetMouseX()), window_width);
@@ -232,15 +235,22 @@ vis(void)
 
 		show_pos ^= IsKeyPressed(KEY_T);
 
-		if (IsKeyDown(KEY_LEFT))
-			zoom_x -= 20.F / zoom;
-		else if (IsKeyDown(KEY_RIGHT))
-			zoom_x += 20.F / zoom;
-
-		if (IsKeyDown(KEY_UP))
-			zoom_y -= 20.F / zoom;
-		else if (IsKeyDown(KEY_DOWN))
-			zoom_y += 20.F / zoom;
+		if (IsKeyDown(KEY_LEFT_ALT)) {
+			if (IsKeyDown(KEY_LEFT) && data_width > 0)
+				data_width -= 1;
+			else if (IsKeyDown(KEY_RIGHT))
+				data_width += 1;
+		} else {
+			if (IsKeyDown(KEY_LEFT))
+				zoom_x -= 20.F / zoom;
+			else if (IsKeyDown(KEY_RIGHT))
+				zoom_x += 20.F / zoom;
+
+			if (IsKeyDown(KEY_UP))
+				zoom_y -= 20.F / zoom;
+			else if (IsKeyDown(KEY_DOWN))
+				zoom_y += 20.F / zoom;
+		}
 
 		if (IsKeyPressed(KEY_P)) {
 			show_value = !show_value;
@@ -250,9 +260,8 @@ vis(void)
 				data_colors = entropy_colors;
 		}
 
-		BeginDrawing();
 
-		ClearBackground(BLACK);
+		ImageClearBackground(&window_image, BLACK);
 
 		for (y = 0; y < window_height; y++) {
 			data_y = (size_t) (zoom_y + y / zoom);
@@ -265,11 +274,21 @@ vis(void)
 					continue;
 
 				data_pos = data_y * data_width + data_x;
-				if (data_pos < data_len)
-					DrawPixel(x, y, data_colors[data_pos]);
+				if (data_pos < data_len) {
+					ImageDrawPixel(&window_image,
+						x, y, data_colors[data_pos]);
+				}
 			}
 		}
 
+		Texture2D tex = LoadTextureFromImage(window_image);
+
+		BeginDrawing();
+
+		ClearBackground(BLACK);
+
+		DrawTexture(tex, 0, 0, WHITE);
+
 		if (show_pos) {
 			data_x = zoom_x + mouse_x / zoom;
 			data_y = zoom_y + mouse_y / zoom;
@@ -286,9 +305,14 @@ vis(void)
 		}
 
 		EndDrawing();
+
+		UnloadTexture(tex);
 	}
 
+	UnloadImage(window_image);
+
 	CloseWindow();
+
 	free(window_title);
 }