From 60684bb15f5c68eb8248673da48cc4469537ffc9 Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Wed, 19 May 2021 14:26:30 +0200
Subject: Add a new console drawing mode

---
 src/text.h | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 59 insertions(+), 9 deletions(-)

(limited to 'src/text.h')

diff --git a/src/text.h b/src/text.h
index bfac4e4..b3bb601 100644
--- a/src/text.h
+++ b/src/text.h
@@ -9,6 +9,7 @@
 
 typedef enum {
     TXT_MODE_TILED_BG,
+    TXT_MODE_HYBRID,
     TXT_MODE_MODE3,
 } TextMode;
 
@@ -114,6 +115,36 @@ txt_putc_m3(char c) {
     }
 }
 
+void
+txt_putc_hybrid(char c) {
+    if (c == '\0') {
+        return;
+    }
+    if (c == '\n') {
+        text_engine.cursor_x = 0;
+        text_engine.cursor_y++;
+    } else {
+        u8 idx = text_engine.font.char_map[(int)c] * 2;
+        u32 *packed_char = text_engine.font.data;
+        packed_char += idx;
+        Tile tile = {0};
+        unpack_tiles(packed_char, &tile, 1);
+        int x = text_engine.cursor_x;
+        int y = text_engine.cursor_y;
+        // DEBUG: should be on the text struct.
+        Tile *buf = &TILE_MEM[0];
+        buf[x + y * 30] = tile;
+        text_engine.cursor_x += 1;
+        if (text_engine.cursor_x >= 30) {
+            text_engine.cursor_x = 0;
+            text_engine.cursor_y++;
+        }
+    }
+    if (text_engine.cursor_y >= 20) {
+        text_engine.cursor_y = 0;
+    }
+}
+
 void
 txt_putc(char c) {
     switch (text_engine.mode) {
@@ -123,6 +154,9 @@ txt_putc(char c) {
         case TXT_MODE_MODE3: {
             txt_putc_m3(c);
         } break;
+        case TXT_MODE_HYBRID: {
+            txt_putc_hybrid(c);
+        } break;
     }
 }
 
@@ -164,9 +198,6 @@ txt_init_tile(size_t bg, Font font, size_t cb_idx) {
 
 void
 txt_init_bitmap(TextMode mode, Font font) {
-    // NOTE: Only mode 3 is currently supported
-    assert(mode == TXT_MODE_MODE3);
-
     // If font_map is NULL, initialize the standard 0-255 character map.
     if (font.char_map == NULL) {
         for (size_t i = 0; i < 256; ++i) {
@@ -201,22 +232,41 @@ txt_printf(char *msg, ...) {
     txt_puts(buf);
 }
 
-// TODO: Update for working on bitmap modes.
 void
-txt_clear_line(void) {
+txt_clear_line_tiled(void) {
     for (size_t i = 0; i < 30; ++i) {
         text_engine.memory[i + 32 * text_engine.cursor_y] = ' ';
     }
     text_engine.cursor_x = 0;
 }
 
-// TODO: Update for working on bitmap modes.
+void
+txt_clear_line_bitmap(void) {
+    // DEBUG: should be on the text struct.
+    Tile *buf = &TILE_MEM[0];
+    for (size_t i = 0; i < 30; ++i) {
+        buf[i + text_engine.cursor_y * 30] = (Tile){0};
+    }
+}
+
+void
+txt_clear_line(void) {
+    switch (text_engine.mode) {
+        case TXT_MODE_TILED_BG: {
+            txt_clear_line_tiled();
+        } break;
+        case TXT_MODE_MODE3:
+        case TXT_MODE_HYBRID: {
+            txt_clear_line_bitmap();
+        } break;
+    }
+}
+
 void
 txt_clear_screen(void) {
     for (size_t j = 0; j < 20; ++j) {
-        for (size_t i = 0; i < 30; ++i) {
-            text_engine.memory[i + 32 * j] = ' ';
-        }
+        text_engine.cursor_y = j;
+        txt_clear_line();
     }
     text_engine.cursor_x = 0;
     text_engine.cursor_y = 0;
-- 
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