Fixed flashing text issue, moved textbox to window layer.

archive/main.c

@@ -187,7 +187,7 @@ void main() {
 
   // Fill screen white
   for(j = 0; j < GB_BACKGROUND_COLUMNS * GB_BACKGROUND_ROWS; j++) filled[j] = SPRITE_TILESET_BLACK_LOW;
-  spriteBufferBackgroundLow(0x00, 0x00, GB_BACKGROUND_COLUMNS, GB_BACKGROUND_ROWS, filled);
+  spriteBufferBackground(0x00, 0x00, GB_BACKGROUND_COLUMNS, GB_BACKGROUND_ROWS, filled);
   SCX_REG = 0x00;
   SCY_REG = 0x00;
 

src/conversation/questionbox.c

@@ -44,7 +44,7 @@ void questionBoxSetOptions(char *title, char **options, uint8_t count) {
 
   // Repurpose old array and draw arrow
   spaces[0] = spriteFontTileFromChar(QUESTION_BOX_CURSOR);
-  spriteBufferBackgroundHigh(0x01, TEXTBOX_WIN_Y + 0x02, 1, 1, spaces);
+  spriteBufferWindow(0x01, TEXTBOX_Y + 0x02, 1, 1, spaces);
 }
 
 inline void questionBoxUpdate() {
@@ -76,9 +76,9 @@ inline void questionBoxUpdate() {
     } else {
       tiles[0] = spriteFontTileFromChar(' ');
     }
-    spriteBufferBackgroundHigh(
+    spriteBufferWindow(
       0x01 + ((i % 0x02) * QUESTION_BOX_QUESTION_SPACES),
-      TEXTBOX_WIN_Y + 0x02 + (i / 0x02),
+      TEXTBOX_Y + 0x02 + (i / 0x02),
       1, 1,
       tiles
     );

src/conversation/textbox.c

@@ -77,6 +77,8 @@ void conversationTextboxSetText(char *text) {
   // Now we have organized the string nicely we can prep for rendering. Fill the
   // tiles with blank chars.
   textboxFillBlank();
+  WY_REG = TEXTBOX_WINDOW_Y * TILE_HEIGHT;
+  SHOW_WIN;
 }
 
 inline void textboxFillBlank() {
@@ -86,8 +88,8 @@ inline void textboxFillBlank() {
     tiles, TEXTBOX_WIDTH_IN_TILES, TEXTBOX_HEIGHT_IN_TILES, SPRITE_TILESET_WHITE_HIGH
   );
 
-  spriteBufferBackgroundHigh(
+  spriteBufferWindow(
-    0x00, TEXTBOX_WIN_Y,
+    0x00, TEXTBOX_Y,
     TEXTBOX_WIDTH_IN_TILES, TEXTBOX_HEIGHT_IN_TILES,
     tiles
   );
@@ -108,6 +110,7 @@ inline void conversationTextboxUpdate() {
       if((TEXTBOX_ROW_COUNT - TEXTBOX_ROW_CURRENT) < TEXTBOX_TILES_ROWS) {
         TEXTBOX_STATE &= ~TEXTBOX_STATE_VISIBLE;
         HIDE_WIN;
+        LCDC_REG |= LCDCF_BG8000;
         conversationQueueNext();
         return;
       }
@@ -129,9 +132,9 @@ inline void conversationTextboxUpdate() {
   } else {
     tile = spriteFontTileFromChar(c);
 
-    spriteBufferBackgroundHigh(
+    spriteBufferWindow(
       0x01 + (TEXTBOX_SCROLL % TEXTBOX_CHARS_PER_ROW),
-      TEXTBOX_WIN_Y + 0x01 + (TEXTBOX_SCROLL / TEXTBOX_CHARS_PER_ROW),
+      TEXTBOX_Y + 0x01 + (TEXTBOX_SCROLL / TEXTBOX_CHARS_PER_ROW),
       1, 1,
       &tile
     );

src/conversation/textbox.h

@@ -32,7 +32,9 @@
 
 #define TEXTBOX_SCROLL_ROWS_MAX 14
 
-#define TEXTBOX_WIN_Y (18 - TEXTBOX_HEIGHT_IN_TILES)
+#define TEXTBOX_Y 0x00
+#define TEXTBOX_WINDOW_Y (18 - TEXTBOX_HEIGHT_IN_TILES)
+#define TEXTBOX_SCREEN_Y (TEXTBOX_WINDOW_Y + TEXTBOX_Y)
 
 extern char TEXTBOX_TEXTS[TEXTBOX_SCROLL_ROWS_MAX * TEXTBOX_CHARS_PER_ROW];
 extern uint8_t TEXTBOX_ROW_COUNT;

src/interrupts.h

@@ -9,6 +9,6 @@
 #include "libs.h"
 #include "conversation/textbox.h"
 
-#define INTERRUPT_TEXTBOX_VRAM ((TEXTBOX_WIN_Y * TILE_HEIGHT) - 1)
+#define INTERRUPT_TEXTBOX_VRAM ((TEXTBOX_SCREEN_Y * TILE_HEIGHT) - 1)
 
 void interruptOnScanline();

src/libs.h

@@ -15,4 +15,4 @@
 #include <string.h>
 
 #define TILE_WIDTH 8
-#define TILE_HEIGHT 8
+#define TILE_HEIGHT TILE_WIDTH

src/main.c

@@ -18,11 +18,21 @@ void main() {
   // Create a critical section for some video stuff
   CRITICAL {
     DISPLAY_OFF;
-    LCDC_REG = LCDCF_OFF | LCDCF_BG8000 | LCDCF_BG9800 | LCDCF_BGON;
+    LCDC_REG = LCDCF_OFF | LCDCF_WIN9C00 | LCDCF_BG8000 | LCDCF_BG9800 | LCDCF_BGON;
+      /*
+    * LCD        = Off
+    * WindowBank = 0x9C00
+    * BG Chr     = 0x8800
+    * BG Bank    = 0x9800
+    * BG         = On
+    */
+
     STAT_REG |= STATF_LYC;
     LYC_REG = 0x00;
     SCX_REG = 0x00;
     SCY_REG = 0x00;
+    WX_REG = TILE_WIDTH;
+    // WY_REG = 0x00;
     add_LCD(interruptOnScanline);
   }
   set_interrupts(VBL_IFLAG | LCD_IFLAG);
@@ -47,12 +57,12 @@ void main() {
   for(j = 0; j < GB_BACKGROUND_COLUMNS * GB_BACKGROUND_ROWS; j++) {
     filled[j] = SPRITE_TILESET_WHITE_LOW;
   }
-  spriteBufferBackgroundLow(0x00, 0x00, GB_BACKGROUND_COLUMNS, GB_BACKGROUND_ROWS, filled);
+  spriteBufferBackground(0x00, 0x00, GB_BACKGROUND_COLUMNS, GB_BACKGROUND_ROWS, filled);
 
   // Card Test
   uint8_t cardTiles[SPRITE_CARD_TILE_COUNT];
   spriteCardBufferTiles(cardTiles, CARD_SPADES_QUEEN);
-  spriteBufferBackgroundLow(0x00, 0x00, SPRITE_CARD_WIDTH, SPRITE_CARD_HEIGHT, cardTiles);
+  spriteBufferBackground(0x00, 0x00, SPRITE_CARD_WIDTH, SPRITE_CARD_HEIGHT, cardTiles);
 
   // Now turn the screen on
   DISPLAY_ON;

src/sprites/sprites.c

@@ -20,7 +20,7 @@ inline void spriteBufferHigh(uint8_t position, uint8_t length, uint8_t *tiles) {
   vmemcpy(vramPosition, tiles, SPRITE_VRAM_SIZE_PER_TILE * length);
 }
 
-inline void spriteBufferBackgroundLow(
+inline void spriteBufferBackground(
   uint8_t x, uint8_t y,
   uint8_t width, uint8_t height,
   uint8_t *tiles
@@ -28,12 +28,11 @@ inline void spriteBufferBackgroundLow(
   set_tiles(
     x, y,
     height, width,// Bug?
-    SPRITE_VRAM_TILEMAP_LOW,
+    SPRITE_VRAM_TILEMAP_BACKGROUND_LOW,
     tiles
   );
 }
-
+inline void spriteBufferWindow(
-inline void spriteBufferBackgroundHigh(
   uint8_t x, uint8_t y,
   uint8_t width, uint8_t height,
   uint8_t *tiles
@@ -41,7 +40,7 @@ inline void spriteBufferBackgroundHigh(
   set_tiles(
     x, y,
     height, width,// Bug?
-    SPRITE_VRAM_TILEMAP_LOW,
+    SPRITE_VRAM_TILEMAP_WINDOW_LOW,
     tiles
   );
 }

src/sprites/sprites.h

@@ -12,7 +12,8 @@
 #define SPRITE_VRAM_HIGH 0x8800
 #define SPRITE_VRAM_DISTANCE_BETWEEN_LOW_AND_HIGH 0x0800
 #define SPRITE_VRAM_SIZE_PER_TILE 0x10
-#define SPRITE_VRAM_TILEMAP_LOW 0x9800
+#define SPRITE_VRAM_TILEMAP_BACKGROUND_LOW 0x9800
+#define SPRITE_VRAM_TILEMAP_WINDOW_LOW 0x9C00
 
 /**
  * Buffer tiles data into VRAM in the HIGH space (The upper bounds of VRAM)
@@ -32,13 +33,13 @@ inline void spriteBufferHigh(uint8_t position, uint8_t length, uint8_t *tiles);
  */
 inline void spriteBufferLow(uint8_t position, uint8_t length, uint8_t *tiles);
 
-inline void spriteBufferBackgroundLow(
+inline void spriteBufferBackground(
   uint8_t x, uint8_t y,
   uint8_t width, uint8_t height,
   uint8_t *tiles
 );
 
-inline void spriteBufferBackgroundHigh(
+inline void spriteBufferWindow(
   uint8_t x, uint8_t y,
   uint8_t width, uint8_t height,
   uint8_t *tiles