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Store codepoints in a grapheme for saving to pdf

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This commit is contained in:
KirillovIlya
2022-06-14 21:48:25 +03:00
parent 3b581bf5e3
commit bb657dc536
1 changed files with 39 additions and 17 deletions
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56
DesktopEditor/fontengine/js/module.js
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@ -408,28 +408,39 @@ function onLoadFontsModule(window, undefined)
}
};
const FONTSIZE = 72;
const STRING_MAX_LEN = 1024;
const COEF = 25.4 / 72 / 64 / 72;
const COEF = 25.4 / 72 / 64 / FONTSIZE;
let STRING_POINTER = null;
let STRING_LEN = 0;
const CLUSTER = new Uint8Array(STRING_MAX_LEN);
let CLUSTER_LEN = 0;
let CLUSTER_MAX = 0;
const LIGATURE = 2;
const CODEPOINTS = new Uint32Array(STRING_MAX_LEN);
function CClusterUtf8Calculator(clusterBuffer)
AscFonts.MEASURE_FONTSIZE = FONTSIZE;
AscFonts.GRAPHEME_STRING_MAX_LEN = STRING_MAX_LEN;
AscFonts.GRAPHEME_COEF = COEF;
function CCodePointsCalculator(codePointsBuffer, clusterBuffer)
{
this.currentCluster = 0;
this.currentCodePoint = 0;
this.clusterBuffer = clusterBuffer;
this.codePoints = codePointsBuffer;
this.codePointsCount = 0
}
CCodePointsCalculator.prototype.start = function()
{
this.currentCluster = 0;
this.currentCodePoint = 0;
this.buffer = clusterBuffer;
this.codePointsCount = 0;
}
CClusterUtf8Calculator.prototype.start = function()
{
this.currentCluster = 0;
this.currentCodePoint = 0;
}
CClusterUtf8Calculator.prototype.getCodePointsCount = function(cluster)
CCodePointsCalculator.prototype.calculate = function(cluster)
{
this.currentCodePoint += this.codePointsCount;
let nCodePointsCount = 0;
if (cluster < this.currentCluster)
@ -440,15 +451,23 @@ function onLoadFontsModule(window, undefined)
{
while (this.currentCluster < cluster)
{
this.currentCluster += this.buffer[this.currentCodePoint + nCodePointsCount];
this.currentCluster += this.clusterBuffer[this.currentCodePoint + nCodePointsCount];
nCodePointsCount++;
}
}
this.currentCodePoint += nCodePointsCount;
return nCodePointsCount;
this.codePointsCount = nCodePointsCount;
}
const CODEPOINTS_CALCULATOR = new CClusterUtf8Calculator(CLUSTER);
CCodePointsCalculator.prototype.getCount = function()
{
return this.codePointsCount;
};
CCodePointsCalculator.prototype.get = function(nPos)
{
return this.codePoints[this.currentCodePoint + nPos];
};
const CODEPOINTS_CALCULATOR = new CCodePointsCalculator(CODEPOINTS, CLUSTER);
AscFonts.HB_StartString = function()
{
@ -512,7 +531,8 @@ function onLoadFontsModule(window, undefined)
if (-1 !== nClusterLen)
{
CLUSTER[CLUSTER_LEN++] = nClusterLen;
CODEPOINTS[CLUSTER_LEN] = code;
CLUSTER[CLUSTER_LEN++] = nClusterLen;
CLUSTER_MAX += nClusterLen;
}
};
@ -534,7 +554,7 @@ function onLoadFontsModule(window, undefined)
return;
CODEPOINTS_CALCULATOR.start();
let prevCluster = -1, type, flags, gid, cluster, x_advance, y_advance, x_offset, y_offset;
let prevCluster = -1, type, flags, gid, cluster, x_advance, y_advance, x_offset, y_offset, codePoints;
let isLigature = false;
let nWidth = 0;
let reader = READER;
@ -552,7 +572,8 @@ function onLoadFontsModule(window, undefined)
if (cluster !== prevCluster && -1 !== prevCluster)
{
textShaper.FlushGrapheme(AscFonts.GetGrapheme(), nWidth, CODEPOINTS_CALCULATOR.getCodePointsCount(cluster), isLigature);
CODEPOINTS_CALCULATOR.calculate(cluster);
textShaper.FlushGrapheme(AscFonts.GetGrapheme(CODEPOINTS_CALCULATOR), nWidth, CODEPOINTS_CALCULATOR.getCount(), isLigature);
nWidth = 0;
}
@ -566,7 +587,8 @@ function onLoadFontsModule(window, undefined)
AscFonts.AddGlyphToGrapheme(gid, x_advance, y_advance, x_offset, y_offset);
nWidth += x_advance * COEF;
}
textShaper.FlushGrapheme(AscFonts.GetGrapheme(), nWidth, CODEPOINTS_CALCULATOR.getCodePointsCount(CLUSTER_MAX), isLigature);
CODEPOINTS_CALCULATOR.calculate(CLUSTER_MAX);
textShaper.FlushGrapheme(AscFonts.GetGrapheme(CODEPOINTS_CALCULATOR), nWidth, CODEPOINTS_CALCULATOR.getCount(), isLigature);
retObj["free"]();
};