modified IPL font support to always use ANSI font by default (fix corrupted text on Japanese consoles)

source/gx/gui/font.c

@@ -1,10 +1,10 @@
 /*****************************************************************************
  * font.c
  *
- *   IPL FONT Engine, using GX hardware
+ *   IPL font engine
  *
- *   original font engine by Softdev (2006)
+ *   original font support by Softdev (2006)
- *   GX engine by Eke-Eke (2008,2009)
+ *   GX rendering by Eke-Eke (2008,2009)
  * 
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -26,9 +26,27 @@
 #include "font.h"
 #include "gui.h"
 
-int font_size[256], fheight;
+#define _SHIFTR(v, s, w)	\
+    ((u32)(((u32)(v) >> (s)) & ((0x01 << (w)) - 1)))
+
+typedef struct _yay0header {
+	unsigned int id ATTRIBUTE_PACKED;
+	unsigned int dec_size ATTRIBUTE_PACKED;
+	unsigned int links_offset ATTRIBUTE_PACKED;
+	unsigned int chunks_offset ATTRIBUTE_PACKED;
+} yay0header;
+
+int font_size[256];
+int fheight;
+
+static u8 *fontImage;
+static u8 *fontTexture;
+static void *ipl_fontarea;
+static sys_fontheader *fontHeader;
+
 
 #ifndef HW_RVL
+
 /* disable Qoob Modchip before IPL access (emukiddid) */
 static void ipl_set_config(unsigned char c)
 {
@@ -47,56 +65,135 @@ static void ipl_set_config(unsigned char c)
   while (exi[0 * 5 + 3] & 1);
   exi[0] &= 0x405;        //deselect IPL
 }
+
 #endif
 
-static sys_fontheader *fontHeader;
+static void decode_szp(void *src,void *dest)
-static u8 *fontTexture;
-
-int FONT_Init(void)
 {
-#ifndef HW_RVL
+	u32 i,k,link;
-  /* disable Qoob before accessing IPL */
+	u8 *dest8,*tmp;
-  ipl_set_config(6);
+	u32 loff,coff,roff;
-#endif
+	u32 size,cnt,cmask,bcnt;
+	yay0header *header;
 
-  /* initialize IPL font */
+	dest8 = (u8*)dest;
-  fontHeader = memalign(32,sizeof(sys_fontheader));
+	header = (yay0header*)src;
-  if (!fontHeader) return 0;
+	size = header->dec_size;
-  SYS_InitFont(&fontHeader);
+	loff = header->links_offset;
+	coff = header->chunks_offset;
 
-  /* character width table */
+	roff = sizeof(yay0header);
-  int i,c;
+	cmask = 0;
-  for (i=0; i<256; ++i)
+	cnt = 0;
-  {
+	bcnt = 0;
-    if ((i < fontHeader->first_char) || (i > fontHeader->last_char)) c = fontHeader->inval_char;
+
-    else c = i - fontHeader->first_char;
+	do {
-    font_size[i] = ((unsigned char*)fontHeader)[fontHeader->width_table + c];
+		if(!bcnt) {
+			cmask = *(u32*)(src+roff);
+			roff += 4;
+			bcnt = 32;
 		}
 
-  /* default font height */
+		if(cmask&0x80000000) {
-  fheight = fontHeader->cell_height;
+			dest8[cnt++] = *(u8*)(src+coff);
+			coff++;
+		} else {
+			link = *(u16*)(src+loff);
+			loff += 2;
 
-  /* initialize texture data */
+			tmp = dest8+(cnt-(link&0x0fff)-1);
-  fontTexture = memalign(32, fontHeader->cell_width * fontHeader->cell_height / 2);
+			k = link>>12;
-  if (!fontTexture)
+			if(k==0) {
-  {
+				k = (*(u8*)(src+coff))+18;
-    free(fontHeader);
+				coff++;
-    return 0;
+			} else k += 2;
+
+			for(i=0;i<k;i++) {
+				dest8[cnt++] = tmp[i];
 			}
-
+		}
-  return 1;
+		cmask <<= 1;
+		bcnt--;
+	} while(cnt<size);
 }
 
-void FONT_Shutdown(void)
+static void expand_font(u8 *src,u8 *dest)
 {
-  if (fontHeader) free(fontHeader);
+	s32 cnt;
-  if (fontTexture) free(fontTexture);
+	u32 idx;
+	u8 val1,val2;
+  sys_fontheader *sys_fontdata = fontHeader;
+	u8 *data = (u8*)sys_fontdata+44;
+
+	if(sys_fontdata->sheet_format==0x0000) {
+		cnt = (sys_fontdata->sheet_fullsize/2)-1;
+
+		while(cnt>=0) {
+			idx = _SHIFTR(src[cnt],6,2);
+			val1 = data[idx];
+
+			idx = _SHIFTR(src[cnt],4,2);
+			val2 = data[idx];
+
+			dest[(cnt<<1)+0] =((val1&0xf0)|(val2&0x0f));
+
+			idx = _SHIFTR(src[cnt],2,2);
+			val1 = data[idx];
+
+			idx = _SHIFTR(src[cnt],0,2);
+			val2 = data[idx];
+
+			dest[(cnt<<1)+1] =((val1&0xf0)|(val2&0x0f));
+
+			cnt--;
+		}
+	}
+	DCStoreRange(dest,sys_fontdata->sheet_fullsize);
+}
+
+static void GetFontTexel(s32 c,void *image,s32 pos,s32 stride)
+{
+	u32 sheets,rem;
+	u32 xoff,yoff;
+	u32 xpos,ypos;
+	u8 *img_start;
+	u8 *ptr1,*ptr2;
+  sys_fontheader *sys_fontdata = fontHeader;
+
+	if(c<sys_fontdata->first_char || c>sys_fontdata->last_char) c = sys_fontdata->inval_char;
+	else c -= sys_fontdata->first_char;
+
+	sheets = sys_fontdata->sheet_column*sys_fontdata->sheet_row;
+	rem = c%sheets;
+  sheets = c/sheets;
+	xoff = (rem%sys_fontdata->sheet_column)*sys_fontdata->cell_width;
+	yoff = (rem/sys_fontdata->sheet_column)*sys_fontdata->cell_height;
+	img_start = fontImage+(sys_fontdata->sheet_size*sheets);
+
+	ypos = 0;
+	while(ypos<sys_fontdata->cell_height) {
+		xpos = 0;
+		while(xpos<sys_fontdata->cell_width) {
+			ptr1 = img_start+(((sys_fontdata->sheet_width/8)<<5)*((ypos+yoff)/8));
+			ptr1 = ptr1+(((xpos+xoff)/8)<<5);
+			ptr1 = ptr1+(((ypos+yoff)%8)<<2);
+			ptr1 = ptr1+(((xpos+xoff)%8)/2);
+
+			ptr2 = image+((ypos/8)*(((stride<<1)/8)<<5));
+			ptr2 = ptr2+(((xpos+pos)/8)<<5);
+			ptr2 = ptr2+(((xpos+pos)%8)/2);
+			ptr2 = ptr2+((ypos%8)<<2);
+
+			*ptr2 = *ptr1;
+
+			xpos += 2;
+		}
+		ypos++;
+	}
 }
 
 static void DrawChar(unsigned char c, int xpos, int ypos, int size, GXColor color)
 {
-  s32 width;
-
   /* reintialize texture object */
   GXTexObj texobj;
   GX_InitTexObj(&texobj, fontTexture, fontHeader->cell_width, fontHeader->cell_height, GX_TF_I4, GX_CLAMP, GX_CLAMP, GX_FALSE);
@@ -104,12 +201,12 @@ static void DrawChar(unsigned char c, int xpos, int ypos, int size, GXColor colo
 
   /* reinitialize font texture data */
   memset(fontTexture,0,fontHeader->cell_width * fontHeader->cell_height / 2);
-  SYS_GetFontTexel(c,fontTexture,0,fontHeader->cell_width/2,&width);
+  GetFontTexel(c,fontTexture,0,fontHeader->cell_width/2);
   DCFlushRange(fontTexture, fontHeader->cell_width * fontHeader->cell_height / 2);
   GX_InvalidateTexAll();
 
   /* adjust texture width */
-  width = (fontHeader->cell_width * size) / fontHeader->cell_height;
+  s32 width = (fontHeader->cell_width * size) / fontHeader->cell_height;
 
   /* GX rendering */
   GX_Begin(GX_QUADS, GX_VTXFMT0, 4);
@@ -129,37 +226,68 @@ static void DrawChar(unsigned char c, int xpos, int ypos, int size, GXColor colo
   GX_DrawDone();
 }
 
+/****************************************************************************
+ *  IPL font support
+ *
+ ****************************************************************************/
+extern void __SYS_ReadROM(void *buf,u32 len,u32 offset);
 
-void write_font(int x, int y, char *string)
+int FONT_Init(void)
 {
-  int ox = x;
+#ifndef HW_RVL
-  while (*string && (x < (ox + 640)))
+  /* --- Game Cube --- disable Qoob before accessing IPL */
+  ipl_set_config(6);
+#endif
+
+  /* read IPL font (ASCII) from Mask ROM */
+  ipl_fontarea = memalign(32,131360);
+  if (!ipl_fontarea)
+    return 0;
+  memset(ipl_fontarea,0,131360);
+  __SYS_ReadROM(ipl_fontarea+119072,12288,0x1FCF00);
+
+  /* YAY0 decompression */
+  decode_szp(ipl_fontarea+119072,ipl_fontarea);
+
+	/* retrieve IPL font data */
+  fontHeader = (sys_fontheader*)ipl_fontarea;
+  fontImage = (u8*)((((u32)ipl_fontarea+fontHeader->sheet_image)+31)&~31);
+  
+  /* expand to I4 format */
+  expand_font((u8*)ipl_fontarea+fontHeader->sheet_image,fontImage);
+
+  /* character width table */
+  int i,c;
+  for (i=0; i<256; ++i)
   {
-    DrawChar(*string, x -(vmode->fbWidth/2), y-(vmode->efbHeight/2),fontHeader->cell_height,(GXColor)WHITE);
+    if ((i < fontHeader->first_char) || (i > fontHeader->last_char))
-    x += font_size[(u8)*string];
+      c = fontHeader->inval_char;
-    string++;
+    else
+      c = i - fontHeader->first_char;
+
+    font_size[i] = ((unsigned char*)fontHeader)[fontHeader->width_table + c];
   }
+
+  /* font height */
+  fheight = fontHeader->cell_height;
+
+  /* initialize texture data */
+  fontTexture = memalign(32, fontHeader->cell_width * fontHeader->cell_height / 2);
+  if (!fontTexture)
+  {
+    free(ipl_fontarea);
+    return 0;
+  }
+
+  return 1;
 }
 
-void WriteCentre( int y, char *string)
+void FONT_Shutdown(void)
 {
-  int x, t;
+  if (fontHeader)
-  for (x=t=0; t<strlen(string); t++) x += font_size[(u8)string[t]];
+    free(ipl_fontarea);
-  if (x>640) x=640;
+  if (fontTexture)
-  x = (640 - x) >> 1;
+    free(fontTexture);
-  write_font(x, y, string);
-}
-
-void WriteCentre_HL( int y, char *string)
-{
-  gx_texture *texture = gxTextureOpenPNG(Overlay_bar_png,0);
-  if (texture)
-  {
-    gxDrawTexture(texture, 0, y-fheight,  640, fheight,240);
-    if (texture->data) free(texture->data);
-    free(texture);
-  }
-  WriteCentre(y, string);
 }
 
 int FONT_write(char *string, int size, int x, int y, int max_width, GXColor color)
@@ -234,6 +362,43 @@ void FONT_alignRight(char *string, int size, int x, int y, GXColor color)
   }
 }
 
+
+/****************************************************************************
+ *  Write functions (OLD)
+ *
+ ****************************************************************************/
+void write_font(int x, int y, char *string)
+{
+  int ox = x;
+  while (*string && (x < (ox + 640)))
+  {
+    DrawChar(*string, x -(vmode->fbWidth/2), y-(vmode->efbHeight/2),fontHeader->cell_height,(GXColor)WHITE);
+    x += font_size[(u8)*string];
+    string++;
+  }
+}
+
+void WriteCentre( int y, char *string)
+{
+  int x, t;
+  for (x=t=0; t<strlen(string); t++) x += font_size[(u8)string[t]];
+  if (x>640) x=640;
+  x = (640 - x) >> 1;
+  write_font(x, y, string);
+}
+
+void WriteCentre_HL( int y, char *string)
+{
+  gx_texture *texture = gxTextureOpenPNG(Overlay_bar_png,0);
+  if (texture)
+  {
+    gxDrawTexture(texture, 0, y-fheight,  640, fheight,240);
+    if (texture->data) free(texture->data);
+    free(texture);
+  }
+  WriteCentre(y, string);
+}
+
 /****************************************************************************
  *  Draw functions (FrameBuffer)
  *