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-rw-r--r--src/libs/graphics/font.c334
1 files changed, 334 insertions, 0 deletions
diff --git a/src/libs/graphics/font.c b/src/libs/graphics/font.c
new file mode 100644
index 0000000..638c814
--- /dev/null
+++ b/src/libs/graphics/font.c
@@ -0,0 +1,334 @@
+//Copyright Paul Reiche, Fred Ford. 1992-2002
+
+/*
+ * 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
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "gfxintrn.h"
+#include "tfb_prim.h"
+#include "libs/log.h"
+
+static inline TFB_Char *getCharFrame (FONT_DESC *fontPtr, UniChar ch);
+
+
+FONT
+SetContextFont (FONT Font)
+{
+ FONT LastFont;
+
+ LastFont = _CurFontPtr;
+ _CurFontPtr = Font;
+ if (ContextActive ())
+ SwitchContextFont (Font);
+
+ return (LastFont);
+}
+
+BOOLEAN
+DestroyFont (FONT FontRef)
+{
+ if (FontRef == NULL)
+ return (FALSE);
+
+ if (_CurFontPtr && _CurFontPtr == FontRef)
+ SetContextFont ((FONT)NULL);
+
+ return (FreeFont (FontRef));
+}
+
+// XXX: Should be in frame.c (renamed to something decent?)
+void
+font_DrawText (TEXT *lpText)
+{
+ RECT ClipRect;
+ POINT origin;
+ TEXT text;
+
+ FixContextFontEffect ();
+ if (!GraphicsSystemActive () || !GetContextValidRect (NULL, &origin))
+ return;
+
+ // TextRect() clobbers TEXT.CharCount so we have to make a copy
+ text = *lpText;
+ if (!TextRect (&text, &ClipRect, NULL))
+ return;
+ // ClipRect is relative to origin
+ _text_blt (&ClipRect, &text, origin);
+}
+
+/* Draw the stroke by drawing the same text in the
+ * background color one pixel shifted to all 4 directions.
+ */
+void
+font_DrawTracedText (TEXT *pText, Color text, Color trace)
+{
+ // Preserve current foreground color for full correctness
+ Color oldfg = SetContextForeGroundColor (trace);
+ pText->baseline.x--;
+ font_DrawText (pText);
+ pText->baseline.x += 2;
+ font_DrawText (pText);
+ pText->baseline.x--;
+ pText->baseline.y--;
+ font_DrawText (pText);
+ pText->baseline.y += 2;
+ font_DrawText (pText);
+ pText->baseline.y--;
+ SetContextForeGroundColor (text);
+ font_DrawText (pText);
+ SetContextForeGroundColor (oldfg);
+}
+
+BOOLEAN
+GetContextFontLeading (SIZE *pheight)
+{
+ if (_CurFontPtr != 0)
+ {
+ *pheight = (SIZE)_CurFontPtr->Leading;
+ return (TRUE);
+ }
+
+ *pheight = 0;
+ return (FALSE);
+}
+
+BOOLEAN
+GetContextFontLeadingWidth (SIZE *pwidth)
+{
+ if (_CurFontPtr != 0)
+ {
+ *pwidth = (SIZE)_CurFontPtr->LeadingWidth;
+ return (TRUE);
+ }
+
+ *pwidth = 0;
+ return (FALSE);
+}
+
+BOOLEAN
+TextRect (TEXT *lpText, RECT *pRect, BYTE *pdelta)
+{
+ BYTE char_delta_array[MAX_DELTAS];
+ FONT FontPtr;
+
+ FontPtr = _CurFontPtr;
+ if (FontPtr != 0 && lpText->CharCount != 0)
+ {
+ COORD top_y, bot_y;
+ SIZE width;
+ UniChar next_ch = 0;
+ const char *pStr;
+ COUNT num_chars;
+
+ num_chars = lpText->CharCount;
+ /* At this point lpText->CharCount contains the *maximum* number of
+ * characters that lpText->pStr may contain.
+ * After the while loop below, it will contain the actual number.
+ */
+ if (pdelta == 0)
+ {
+ pdelta = char_delta_array;
+ if (num_chars > MAX_DELTAS)
+ {
+ num_chars = MAX_DELTAS;
+ lpText->CharCount = MAX_DELTAS;
+ }
+ }
+
+ top_y = 0;
+ bot_y = 0;
+ width = 0;
+ pStr = lpText->pStr;
+ if (num_chars > 0)
+ {
+ next_ch = getCharFromString (&pStr);
+ if (next_ch == '\0')
+ num_chars = 0;
+ }
+ while (num_chars--)
+ {
+ UniChar ch;
+ SIZE last_width;
+ TFB_Char *charFrame;
+
+ last_width = width;
+
+ ch = next_ch;
+ if (num_chars > 0)
+ {
+ next_ch = getCharFromString (&pStr);
+ if (next_ch == '\0')
+ {
+ lpText->CharCount -= num_chars;
+ num_chars = 0;
+ }
+ }
+
+ charFrame = getCharFrame (FontPtr, ch);
+ if (charFrame != NULL && charFrame->disp.width)
+ {
+ COORD y;
+
+ y = -charFrame->HotSpot.y;
+ if (y < top_y)
+ top_y = y;
+ y += charFrame->disp.height;
+ if (y > bot_y)
+ bot_y = y;
+
+ width += charFrame->disp.width;
+#if 0
+ if (num_chars && next_ch < (UNICODE) MAX_CHARS
+ && !(FontPtr->KernTab[ch]
+ & (FontPtr->KernTab[next_ch] >> 2)))
+ width -= FontPtr->KernAmount;
+#endif
+ }
+
+ *pdelta++ = (BYTE)(width - last_width);
+ }
+
+ if (width > 0 && (bot_y -= top_y) > 0)
+ {
+ /* subtract off default character spacing */
+ if (pdelta[-1] > 0)
+ {
+ --pdelta[-1];
+ --width;
+ }
+
+ if (lpText->align == ALIGN_LEFT)
+ pRect->corner.x = 0;
+ else if (lpText->align == ALIGN_CENTER)
+ pRect->corner.x = -(width >> 1);
+ else
+ pRect->corner.x = -width;
+ pRect->corner.y = top_y;
+ pRect->extent.width = width;
+ pRect->extent.height = bot_y;
+
+ pRect->corner.x += lpText->baseline.x;
+ pRect->corner.y += lpText->baseline.y;
+
+ return (TRUE);
+ }
+ }
+
+ pRect->corner = lpText->baseline;
+ pRect->extent.width = 0;
+ pRect->extent.height = 0;
+
+ return (FALSE);
+}
+
+void
+_text_blt (RECT *pClipRect, TEXT *TextPtr, POINT ctxOrigin)
+{
+ FONT FontPtr;
+ COUNT num_chars;
+ UniChar next_ch;
+ const char *pStr;
+ POINT origin;
+ TFB_Image *backing;
+ DrawMode mode = _get_context_draw_mode ();
+
+ FontPtr = _CurFontPtr;
+ if (FontPtr == NULL)
+ return;
+ backing = _get_context_font_backing ();
+ if (!backing)
+ return;
+
+ origin.x = pClipRect->corner.x;
+ origin.y = TextPtr->baseline.y;
+ num_chars = TextPtr->CharCount;
+ if (num_chars == 0)
+ return;
+
+ pStr = TextPtr->pStr;
+
+ next_ch = getCharFromString (&pStr);
+ if (next_ch == '\0')
+ num_chars = 0;
+ while (num_chars--)
+ {
+ UniChar ch;
+ TFB_Char* fontChar;
+
+ ch = next_ch;
+ if (num_chars > 0)
+ {
+ next_ch = getCharFromString (&pStr);
+ if (next_ch == '\0')
+ num_chars = 0;
+ }
+
+ fontChar = getCharFrame (FontPtr, ch);
+ if (fontChar != NULL && fontChar->disp.width)
+ {
+ RECT r;
+
+ r.corner.x = origin.x - fontChar->HotSpot.x;
+ r.corner.y = origin.y - fontChar->HotSpot.y;
+ r.extent.width = fontChar->disp.width;
+ r.extent.height = fontChar->disp.height;
+ if (BoxIntersect (&r, pClipRect, &r))
+ {
+ TFB_Prim_FontChar (origin, fontChar, backing, mode,
+ ctxOrigin);
+ }
+
+ origin.x += fontChar->disp.width;
+#if 0
+ if (num_chars && next_ch < (UNICODE) MAX_CHARS
+ && !(FontPtr->KernTab[ch]
+ & (FontPtr->KernTab[next_ch] >> 2)))
+ origin.x -= FontPtr->KernAmount;
+#endif
+ }
+ }
+}
+
+static inline TFB_Char *
+getCharFrame (FONT_DESC *fontPtr, UniChar ch)
+{
+ UniChar pageStart = ch & CHARACTER_PAGE_MASK;
+ size_t charIndex;
+
+ FONT_PAGE *page = fontPtr->fontPages;
+ for (;;)
+ {
+ if (page == NULL)
+ return NULL;
+
+ if (page->pageStart == pageStart)
+ break;
+
+ page = page->next;
+ }
+
+ charIndex = ch - page->firstChar;
+ if (ch >= page->firstChar && charIndex < page->numChars
+ && page->charDesc[charIndex].data)
+ {
+ return &page->charDesc[charIndex];
+ }
+ else
+ {
+ //log_add (log_Debug, "Character %u not present", (unsigned int) ch);
+ return NULL;
+ }
+}
+
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