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