init

1 files changed, 35 insertions, 0 deletions

diff --git a/src/paint.c b/src/paint.c
new file mode 100644
index 0000000..a804d14
--- /dev/null
+++ b/src/paint.c
@@ -0,0 +1,35 @@
+#include <string.h>
+#include "ssd1306_display_driver.h"
+#include "paint.h"
+#include "br24t_eeprom_driver.h"
+
+#define TWOD_INDEX(x, y) ((y * SCREEN_RES_Y) / 8) + x //TODO rename to insinuate /8
+                                                      //
+/** I'm not using the screen's buffer as a standard 2d array, 
+ *  this is because of how pixels are represented in the display's GDRAM.
+ *
+ *  While it would be nicer to just resort the array every time it's updated,
+ *  keeping driver abstractions in it's own file (like we should),
+ *  this way we don't have to resort every time we redraw.
+ *
+ *  Some operations may not need a resort, for example, images/videos optmimized
+ *  for GDRAM. Doing it in each function helps us prevent unnessesary calculations
+ *  while doing real time operations like videos.
+ */
+
+void screen_clear() { memset(&screen_buffer, 0, sizeof(screen_buffer)); }
+
+//images are optimized to follow page formatting
+void draw_image(EEPROM_ADDR image) {
+  for(int on_pix = 0; on_pix < (SCREEN_RES_X * SCREEN_RES_Y) / 8; on_pix++)
+    screen_buffer[on_pix] = EEPROM_READBYTE(image + on_pix); 
+}
+
+//however here we need to compensate 
+void draw_hline(int pos_y) {
+  for(int on_pix = 0; on_pix < SCREEN_RES_X; on_pix++)
+    screen_buffer[((pos_y / 8) * 8) + on_pix] |= (1 << (pos_y % 8));
+}
+
+void draw_text(char *text, int x, int y, EEPROM_ADDR font) { 
+}