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opt / alt / libicu / usr / share / doc / alt-libicu-devel / samples / layout /

?? ..
?? FontMap.GDI(426 B)
?? FontMap.Gnome(392 B)
?? FontMap.cpp(7.34 KB)
?? FontMap.h(1.84 KB)
?? FontTableCache.cpp(2.37 KB)
?? FontTableCache.h(1.06 KB)
?? GDIFontInstance.cpp(9.6 KB)
?? GDIFontInstance.h(3.6 KB)
?? GDIFontMap.cpp(1.32 KB)
?? GDIFontMap.h(1.23 KB)
?? GDIGUISupport.cpp(862 B)
?? GDIGUISupport.h(949 B)
?? GUISupport.h(890 B)
?? GnomeFontInstance.cpp(5.43 KB)
?? GnomeFontInstance.h(3.79 KB)
?? GnomeFontMap.cpp(1.39 KB)
?? GnomeFontMap.h(1.21 KB)
?? GnomeGUISupport.cpp(1.05 KB)
?? GnomeGUISupport.h(961 B)
?? LayoutSample.rc(3.37 KB)
?? Makefile(2.92 KB)
?? Makefile.in(2.92 KB)
?? RenderingSurface.h(1.09 KB)
?? Sample.txt(1.66 KB)
?? ScriptCompositeFontInstance.cpp(3.2 KB)
?? ScriptCompositeFontInstance.h(6.15 KB)
?? Surface.cpp(892 B)
?? Surface.h(519 B)
?? UnicodeReader.cpp(4.1 KB)
?? UnicodeReader.h(999 B)
?? arraymem.h(646 B)
?? cgnomelayout.c(8.45 KB)
?? clayout.c(9.82 KB)
?? cmaps.cpp(5.3 KB)
?? cmaps.h(2.06 KB)
?? gdiglue.cpp(1.67 KB)
?? gdiglue.h(983 B)
?? gnomeglue.cpp(1.64 KB)
?? gnomeglue.h(986 B)
?? gnomelayout.cpp(8.5 KB)
?? gsupport.h(370 B)
?? layout.cpp(9.8 KB)
?? layout.sln(1.17 KB)
?? layout.vcxproj(13.15 KB)
?? layout.vcxproj.filters(3.06 KB)
?? paragraph.cpp(7.58 KB)
?? paragraph.h(2.18 KB)
?? pflow.c(9.27 KB)
?? pflow.h(940 B)
?? readme.html(7.32 KB)
?? resource.h(907 B)
?? rsurface.cpp(712 B)
?? rsurface.h(528 B)
?? sfnt.h(4.9 KB)
?? ucreader.cpp(509 B)
?? ucreader.h(422 B)

Editing: pflow.c

/*
 *
 * © 2016 and later: Unicode, Inc. and others.
 * License & terms of use: http://www.unicode.org/copyright.html#License
 *
 * (C) Copyright IBM Corp. 1998-2007 - All Rights Reserved
 *
 */

#include "unicode/utypes.h"
#include "unicode/uchar.h"
#include "unicode/ubidi.h"
#include "unicode/ustring.h"

#include "layout/LETypes.h"

#include "layout/loengine.h"
#include "layout/playout.h"
#include "layout/plruns.h"

#include "pflow.h"

#include "arraymem.h"
#include "ucreader.h"

/*
 * Move the line below out of this comment
 * to add a locale run to the pl_paragraphs
 * that are created.
#define TEST_LOCALE "zh_TW"
 */

#define MARGIN 10
#define LINE_GROW 32
#define PARA_GROW 8

#define CH_LF 0x000A
#define CH_CR 0x000D
#define CH_LSEP 0x2028
#define CH_PSEP 0x2029

struct pf_object
{
    pl_paragraph    **fParagraphLayout;

le_int32          fParagraphCount;
    le_int32          fParagraphMax;
    le_int32          fParagraphGrow;
    
    le_int32          fLineCount;
    le_int32          fLinesMax;
    le_int32          fLinesGrow;

pl_line         **fLines;

LEUnicode         *fChars;

le_int32          fLineHeight;
    le_int32          fAscent;
    le_int32          fWidth;
    le_int32          fHeight;
    UBiDiLevel        fParagraphLevel;
};

typedef struct pf_object pf_object;

static LEUnicode *skipLineEnd(LEUnicode *ptr)
{
    if (ptr[0] == CH_CR && ptr[1] == CH_LF) {
        ptr += 1;
    }

return ptr + 1;
}

static le_int32 findFontRun(const pl_fontRuns *fontRuns, le_int32 offset)
{
    le_int32 runCount = pl_getFontRunCount(fontRuns);
    le_int32 run;

for (run = 0; run < runCount; run += 1) {
        if (pl_getFontRunLimit(fontRuns, run) > offset) {
            return run;
        }
    }

return -1;
}

static void subsetFontRuns(const pl_fontRuns *fontRuns, le_int32 start, le_int32 limit, pl_fontRuns *sub)
{
    le_int32 startRun = findFontRun(fontRuns, start);
    le_int32 endRun   = findFontRun(fontRuns, limit - 1);
    le_int32 run;

pl_resetFontRuns(sub);

for (run = startRun; run <= endRun; run += 1) {
        const le_font *runFont = pl_getFontRunFont(fontRuns, run);
        le_int32 runLimit = pl_getFontRunLimit(fontRuns, run) - start;

if (run == endRun) {
            runLimit = limit - start;
        }

pl_addFontRun(sub, runFont, runLimit);
    }
}

pf_flow *pf_create(const LEUnicode chars[], le_int32 charCount, const pl_fontRuns *fontRuns, LEErrorCode *status)
{
    pf_object *flow;
    le_int32 ascent  = 0;
    le_int32 descent = 0;
    le_int32 leading = 0;
	pl_localeRuns *locales = NULL;
    pl_fontRuns *fr;
    LEUnicode *pStart;
    static const LEUnicode separators[] = {CH_LF, CH_CR, CH_LSEP, CH_PSEP, 0x0000};

if (LE_FAILURE(*status)) {
		return NULL;
	}

flow = NEW_ARRAY(pf_object, 1);

flow->fParagraphLayout = NULL;
    flow->fParagraphCount  = 0;
    flow->fParagraphMax    = PARA_GROW;
    flow->fParagraphGrow   = PARA_GROW;
    flow->fLineCount       = 0;
    flow->fLinesMax        = LINE_GROW;
    flow->fLinesGrow       = LINE_GROW;
    flow->fLines           = NULL;
    flow->fChars           = NULL;
    flow->fLineHeight      = -1;
    flow->fAscent          = -1;
    flow->fWidth           = -1;
    flow->fHeight          = -1;
    flow->fParagraphLevel  = UBIDI_DEFAULT_LTR;

fr = pl_openEmptyFontRuns(0);

#ifdef TEST_LOCALE
    locales = pl_openEmptyLocaleRuns(0);
#endif

flow->fLines = NEW_ARRAY(pl_line *, flow->fLinesMax);
    flow->fParagraphLayout = NEW_ARRAY(pl_paragraph *, flow->fParagraphMax);

flow->fChars = NEW_ARRAY(LEUnicode, charCount + 1);
    LE_ARRAY_COPY(flow->fChars, chars, charCount);
    flow->fChars[charCount] = 0;

pStart = &flow->fChars[0];

while (*pStart != 0) {
        LEUnicode *pEnd = u_strpbrk(pStart, separators);
        le_int32 pAscent, pDescent, pLeading;
        pl_paragraph *paragraphLayout = NULL;

if (pEnd == NULL) {
            pEnd = &flow->fChars[charCount];
        }

if (pEnd != pStart) {
            subsetFontRuns(fontRuns, pStart - flow->fChars, pEnd - flow->fChars, fr);

#ifdef TEST_LOCALE
            pl_resetLocaleRuns(locales);
            pl_addLocaleRun(locales, TEST_LOCALE, pEnd - pStart);
#endif

paragraphLayout = pl_create(pStart, pEnd - pStart, fr, NULL, NULL, locales, flow->fParagraphLevel, FALSE, status);

if (LE_FAILURE(*status)) {
                break; /* return? something else? */
            }

if (flow->fParagraphLevel == UBIDI_DEFAULT_LTR) {
                flow->fParagraphLevel = pl_getParagraphLevel(paragraphLayout);
            }

pAscent  = pl_getAscent(paragraphLayout);
            pDescent = pl_getDescent(paragraphLayout);
            pLeading = pl_getLeading(paragraphLayout);

if (pAscent > ascent) {
                ascent = pAscent;
            }

if (pDescent > descent) {
                descent = pDescent;
            }

if (pLeading > leading) {
                leading = pLeading;
            }
        }

if (flow->fParagraphCount >= flow->fParagraphMax) {
            flow->fParagraphLayout = (pl_paragraph **) GROW_ARRAY(flow->fParagraphLayout, flow->fParagraphMax + flow->fParagraphGrow);
            flow->fParagraphMax += flow->fParagraphGrow;
        }

flow->fParagraphLayout[flow->fParagraphCount++] = paragraphLayout;

if (*pEnd == 0) {
            break;
        }

pStart = skipLineEnd(pEnd);
    }

flow->fLineHeight = ascent + descent + leading;
    flow->fAscent     = ascent;

pl_closeLocaleRuns(locales);
    pl_closeFontRuns(fr);

return (pf_flow *) flow;
}

void pf_close(pf_flow *flow)
{
    pf_object *obj = (pf_object *) flow;
    le_int32 i;

for (i = 0; i < obj->fLineCount; i += 1) {
        DELETE_ARRAY(obj->fLines[i]);
    }

DELETE_ARRAY(obj->fLines);

for (i = 0; i < obj->fParagraphCount; i += 1) {
        pl_close(obj->fParagraphLayout[i]);
    }

DELETE_ARRAY(obj->fParagraphLayout);

DELETE_ARRAY(obj->fChars);

DELETE_ARRAY(obj);
}

le_int32 pf_getAscent(pf_flow *flow)
{
    pf_object *obj = (pf_object *) flow;

return obj->fAscent;
}

le_int32 pf_getLineHeight(pf_flow *flow)
{
    pf_object *obj = (pf_object *) flow;

return obj->fLineHeight;
}

le_int32 pf_getLineCount(pf_flow *flow)
{
    pf_object *obj = (pf_object *) flow;

return obj->fLineCount;
}

static void addLine(pf_object *obj, pl_line *line)
{
    if (obj->fLineCount >= obj->fLinesMax) {
        obj->fLines = (pl_line **) GROW_ARRAY(obj->fLines, obj->fLinesMax + obj->fLinesGrow);
        obj->fLinesMax += obj->fLinesGrow;
    }

obj->fLines[obj->fLineCount++] = line;
}

void pf_breakLines(pf_flow *flow, le_int32 width, le_int32 height)
{
    pf_object *obj = (pf_object *) flow;
    le_int32 li, p;
    float lineWidth;
    pl_line *line;

obj->fHeight = height;

/* don't re-break if the width hasn't changed */
    if (obj->fWidth == width) {
        return;
    }

obj->fWidth  = width;

lineWidth = (float) (width - 2 * MARGIN);

/* Free the old Lines... */
    for (li = 0; li < obj->fLineCount; li += 1) {
        pl_closeLine(obj->fLines[li]);
    }

obj->fLineCount = 0;

for (p = 0; p < obj->fParagraphCount; p += 1) {
        pl_paragraph *paragraphLayout = obj->fParagraphLayout[p];

if (paragraphLayout != NULL) {
            pl_reflow(paragraphLayout);
            while ((line = pl_nextLine(paragraphLayout, lineWidth)) != NULL) {
                addLine(obj, line);
            }
        } else {
            addLine(obj, NULL);
        }
    }
}

void pf_draw(pf_flow *flow, rs_surface *surface, le_int32 firstLine, le_int32 lastLine)
{
    pf_object *obj = (pf_object *) flow;
    le_int32 li, x, y;

x = MARGIN;
    y = obj->fAscent;

for (li = firstLine; li <= lastLine; li += 1) {
        const pl_line *line = obj->fLines[li];

if (line != NULL) {
            le_int32 runCount = pl_countLineRuns(line);
            le_int32 run;

if (obj->fParagraphLevel == UBIDI_RTL) {
			    le_int32 lastX = pl_getLineWidth(line);

x = (obj->fWidth - lastX - MARGIN);
		    }

for (run = 0; run < runCount; run += 1) {
                const pl_visualRun *visualRun = pl_getLineVisualRun(line, run);
                le_int32 glyphCount = pl_getVisualRunGlyphCount(visualRun);
                const le_font *font = pl_getVisualRunFont(visualRun);
                const LEGlyphID *glyphs = pl_getVisualRunGlyphs(visualRun);
                const float *positions = pl_getVisualRunPositions(visualRun);

rs_drawGlyphs(surface, font, glyphs, glyphCount, positions, x, y, obj->fWidth, obj->fHeight);
            }
        }

y += obj->fLineHeight;
    }
}

pf_flow *pf_factory(const char *fileName, const le_font *font, gs_guiSupport *guiSupport)
{
    LEErrorCode status  = LE_NO_ERROR;
    le_int32 charCount;
    const UChar *text = uc_readFile(fileName, guiSupport, &charCount);
    pl_fontRuns *fontRuns;
    pf_flow *result = NULL;

if (text == NULL) {
        return NULL;
    }

fontRuns = pl_openEmptyFontRuns(0);

pl_addFontRun(fontRuns, font, charCount);

result = pf_create(text, charCount, fontRuns, &status);

if (LE_FAILURE(status)) {
		pf_close(result);
		result = NULL;
	}

pl_closeFontRuns(fontRuns);

DELETE_ARRAY(text);

return result;    
}

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