1 files changed, 89 insertions, 0 deletions
diff --git a/src/engine/draw_screen.c b/src/engine/draw_screen.c
new file mode 100644
index 0000000..0c31bf6
--- /dev/null
+++ b/src/engine/draw_screen.c
@@ -0,0 +1,89 @@
+#include "engine/draw_screen.h"
+#include "engine/sprite_controller.h"
+
+uint8_t hh_world_to_tile(vec2 pos){
+	//TODO: remove magic file name here
+    FILE* level = fopen("static/level1_test.bin", "rb"); /* open binary file */
+    if (!level) { /* check if file opened successfully */
+        fprintf(stderr, "Error: Failed to open file.\n");
+        return 0;
+    }
+	int index = ((pos.y/16)*40 + pos.x/16);//TODO: remove magic number(s)
+	fseek(level, (index * sizeof(int)) + sizeof(int), SEEK_SET);
+	int tile;// = (int*)malloc(sizeof(int));
+   fread(&tile, sizeof(int), 1, level); // read 1 tile from binary
+
+	fclose(level);
+	// int val = tile;
+	// free(tile);
+	return tile;
+}
+
+
+// remeber old value to know which part to update.
+vec2 previousViewport = { .x = 0, .y = 0 };
+void hh_draw_screen(vec_cor viewport){
+	if (viewport.x == previousViewport.x && viewport.y == previousViewport.y) return;
+	
+	hh_ppu_update_aux((hh_s_ppu_loc_aux){
+		.bg_shift_x = viewport.x,
+		.bg_shift_y = viewport.y,
+		.fg_fetch	= 0,
+		.sysreset	= 0,
+	});
+
+	// update previous viewport values
+	previousViewport = viewport;
+}
+
+void hh_setup_screen(){
+	//(HH_map_size_X*HH_map_size_Y)
+	int size = 2400; // max X = 40 en max Y = 80
+	//TODO: remove magic file name here
+	FILE* level = fopen("static/level1_test.bin", "rb"); /* open binary file */
+	if (!level) { /* check if file opened successfully */
+		fprintf(stderr, "Error: Failed to open level file.\n");
+		return;
+	}
+	fseek(level, (0* sizeof(int)) + sizeof(int), SEEK_SET);
+	int* tile = (int*)malloc(size*sizeof(int));
+   fread(tile, sizeof(int), size, level); // read 1 tile from binary
+
+	fclose(level);
+
+	for(int BAM_index = 0; BAM_index < size; BAM_index++){
+		hh_ppu_update_background(BAM_index, (hh_s_ppu_loc_bam_entry){
+			.horizontal_flip = false,
+			.vertical_flip   = false,
+			.palette_index   = hh_get_palette(tile[BAM_index]),
+			.tilemap_index   = tile[BAM_index],
+		});
+	}
+	free(tile);
+}
+void hh_clear_screen(){
+	// (HH_PPU_SCREEN_HEIGHT*HH_PPU_SCREEN_WIDTH)/(HH_PPU_SPRITE_HEIGHT*HH_PPU_SPRITE_WIDTH)
+	for (int i = 0; i < HH_PPU_BG_CANVAS_TILES_H*HH_PPU_BG_CANVAS_TILES_V; i++) {
+		hh_s_ppu_loc_bam_entry temp = {
+			.vertical_flip=false,.horizontal_flip = false,
+			.palette_index = 3,.tilemap_index = 0
+		};
+		hh_ppu_update_background(i,temp);
+		hh_ppu_update_color(3,0,(hh_ppu_rgb_color_t){0x0,0x0,0x0});
+	}
+	hh_ppu_update_aux((hh_s_ppu_loc_aux){
+		.bg_shift_x = 0,
+		.bg_shift_y = 0,
+		.fg_fetch	= 0,
+		.sysreset	= 0,
+	});
+}
+
+void hh_clear_sprite(){
+	for (int i = 0; i < HH_PPU_FG_SPRITE_COUNT; i++) {
+		hh_ppu_update_foreground(i,(hh_s_ppu_loc_fam_entry){
+			.position_x = -16,
+			.position_y = -16,
+		});
+	}
+}