Add gfx_SetCharData and misc

Author: mateoconlechuga

src/fileioc/fileioc.h

@@ -201,15 +201,16 @@ uint16_t ti_Tell(const ti_var_t slot);
  * Gets the size of a slot
  *
  * @param slot Slot to test
- * @returns The size of the slot variablee
+ * @returns The size of the slot variable
  */
 uint16_t ti_GetSize(const ti_var_t slot);
 
 /**
  * Resizes the slot variable
  *
  * @param slot Slot to resize
- * @param new_size New size of slot 
+ * @param new_size New size of slot
+ * @returns Resized size on success, 0 on failure, or -1 if the slot cannot be opened
  * @note The variable offset is set to the beginning of the file
  */
 int ti_Resize(size_t new_size, const ti_var_t slot);

src/graphx/graphx.asm

@@ -3,7 +3,7 @@
 
  .libraryAppVar     "GRAPHX"		; Name of library on the calc
  .libraryName       "graphx"		; Name of library
- .libraryVersion    7			; Version information (1-255)
+ .libraryVersion    8			; Version information (1-255)
 
 ;-------------------------------------------------------------------------------
 ; v1 functions - Can no longer move/delete
@@ -118,7 +118,11 @@
  .function "gfx_RotateScaleSprite",_RotateScaleSprite
  .function "gfx_RotatedScaledTransparentSprite_NoClip",_RotatedScaledTransparentSprite_NoClip
  .function "gfx_RotatedScaledSprite_NoClip",_RotatedScaledSprite_NoClip
-
+;-------------------------------------------------------------------------------
+; v8 functions
+;-------------------------------------------------------------------------------
+ .function "gfx_SetCharData",_SetCharData
+ 
  .beginDependencies
  .endDependencies
 
@@ -3335,17 +3339,47 @@ _SetFontData:
 ;  arg0 : Pointer to font data
 ;  Set Pointer to NULL to use default font
 ; Returns:
-;  None
+;  Pointer to previous font data
 	pop	de
 	pop	hl
 	push	hl			; hl -> custom font data
 	push	de
 	add	hl,de
 	or	a,a
 	sbc	hl,de
+	ld	de,(TextData_ASM) \.r
 	jr	nz,+_			; if null make default font
 	ld	hl,Char000 \.r
 _:	ld	(TextData_ASM),hl \.r	; save pointer to custom font
+	ex	de,hl
+	ret
+
+;-------------------------------------------------------------------------------
+_SetCharData:
+; Sets a custom font for a specific character
+; Arguments:
+;  arg1 : Character index to change (0-127 or 0-255)
+;  arg0 : Pointer to character data; if null returns current data
+; Returns:
+;  Pointer to character data if null, otherwise pointer to next character
+	ld	iy,0
+	add	iy,sp
+	ld	hl,(iy+6)		; de -> custom character data
+	add	hl,de
+	or	a,a
+	sbc	hl,de			; sets z flag if null
+	ex	de,hl
+	or	a,a
+	sbc	hl,hl
+	ld	l,(iy+3)		; hl = index
+	add	hl,hl
+	add	hl,hl
+	add	hl,hl
+	ld	bc,(TextData_ASM)
+	add	hl,bc
+	ret	z
+	ld	bc,8
+	ldir
 	ret
 
 ;-------------------------------------------------------------------------------

src/graphx/graphx.h

@@ -1161,15 +1161,27 @@ gfx_sprite_t *gfx_RotateScaleSprite(gfx_sprite_t *sprite_in, gfx_sprite_t *sprit
 gfx_sprite_t *gfx_GetSpriteChar(char c);
 
 /**
- * Sets the font
+ * Sets the font's character data
  *
  * Fonts can be created manually or and exported to a C-style format using 8x8 Pixel ROM Font Editor.
  * (https://www.min.at/prinz/o/software/pixelfont/#download)
  *
  * @param data Pointer to formated 8x8 pixel font
+ * @returns Pointer to previous font data
  * @note Format of font data is 8 bytes horizontally aligned.
  */
-void gfx_SetFontData(uint8_t *data);
+uint8_t *gfx_SetFontData(uint8_t *data);
+
+/**
+ * Sets the font data for a specific character
+ *
+ * @param index Character index to modify (if using default font, values range from 0-127, custom font can have indexes 0-255)
+ * @param data Pointer to formated 8x8 pixel font
+ * @returns Pointer to current character data if \p data is NULL, otherwise a pointer to next character data
+ * @note Format of font data is 8 bytes horizontally aligned.
+ * @see gfx_SetFontData
+ */
+uint8_t *gfx_SetCharData(uint8_t index, uint8_t *data);
 
 /**
  * Sets the font spacing