зеркало из https://github.com/mozilla/pjs.git
bug 112490 - add "always use anti alias scaled bitmap font (AASB)"
r=Roland.Mainz@informatik.med.uni-giessen.de, sr=blizzard@mozilla.org
This commit is contained in:
Родитель
ad0f1eb6a9
Коммит
4305b20a78
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@ -161,6 +161,7 @@ struct nsFontCharSetInfo
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PRInt32 mAABitmapScaleMin;
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double mAABitmapOversize;
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double mAABitmapUndersize;
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PRBool mAABitmapScaleAlways;
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PRInt32 mBitmapScaleMin;
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double mBitmapOversize;
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double mBitmapUndersize;
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@ -277,6 +278,7 @@ static nsIAtom* gWesternLocale = nsnull;
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static PRInt32 gOutlineScaleMinimum = 6;
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// Controls for Anti-Aliased Scaled Bitmaps (okay looking)
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static PRBool gAABitmapScaleEnabled = PR_TRUE;
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static PRBool gAABitmapScaleAlways = PR_FALSE;
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static PRInt32 gAABitmapScaleMinimum = 6;
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static double gAABitmapOversize = 1.1;
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static double gAABitmapUndersize = 0.9;
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@ -905,6 +907,13 @@ InitGlobals(void)
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SIZE_FONT_PRINTF(("gAABitmapScaleEnabled = %d", gAABitmapScaleEnabled));
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}
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val = PR_FALSE;
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rv = gPref->GetBoolPref("font.scale.aa_bitmap.always", &val);
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if (NS_SUCCEEDED(rv)) {
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gAABitmapScaleAlways = val;
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SIZE_FONT_PRINTF(("gAABitmapScaleAlways = %d", gAABitmapScaleAlways));
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}
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rv = gPref->GetIntPref("font.scale.aa_bitmap.min", &scale_minimum);
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if (NS_SUCCEEDED(rv)) {
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gAABitmapScaleMinimum = scale_minimum;
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@ -2815,11 +2824,29 @@ SetupUserDefinedFont(nsFontGTK *aFont)
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return aFont->mUserDefinedFont;
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}
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nsFontGTK*
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nsFontMetricsGTK::GetAASBBaseFont(nsFontStretch* aStretch,
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nsFontCharSetInfo* aCharSet)
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{
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nsFontGTK* base_aafont;
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PRInt32 scale_size;
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PRUint32 aa_target_size;
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scale_size = PR_MAX(mPixelSize, aCharSet->mAABitmapScaleMin);
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aa_target_size = MAX((scale_size*2), 16);
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base_aafont = FindNearestSize(aStretch, aa_target_size);
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NS_ASSERTION(base_aafont,
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"failed to find a base font for Anti-Aliased bitmap Scaling");
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return base_aafont;
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}
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nsFontGTK*
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nsFontMetricsGTK::PickASizeAndLoad(nsFontStretch* aStretch,
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nsFontCharSetInfo* aCharSet, PRUnichar aChar, const char *aName)
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{
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PRBool use_scaled_font = PR_FALSE;
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PRBool have_nearly_rightsized_bitmap = PR_FALSE;
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nsFontGTK* base_aafont = nsnull;
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PRInt32 bitmap_size = NOT_FOUND_FONT_SIZE;
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@ -2827,15 +2854,34 @@ nsFontMetricsGTK::PickASizeAndLoad(nsFontStretch* aStretch,
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nsFontGTK* font = FindNearestSize(aStretch, mPixelSize);
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if (font) {
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bitmap_size = font->mSize;
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if ( (bitmap_size >= mPixelSize-(mPixelSize/10))
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&& (bitmap_size <= mPixelSize+(mPixelSize/10)))
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// When the size of a hand tuned font is close to the desired size
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// favor it over outline scaled font
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have_nearly_rightsized_bitmap = PR_TRUE;
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}
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// if we do not have the correct size
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// check if we can use a scaled font
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// (when the size of a hand tuned font is close to the desired size
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// favor it over outline scaled font)
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if (( (bitmap_size < mPixelSize-(mPixelSize/10))
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|| (bitmap_size > mPixelSize+(mPixelSize/10)))
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&& (aStretch->mOutlineScaled)) {
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//
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// If the user says always try to aasb (anti alias scaled bitmap) scale
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//
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if (gAABitmapScaleEnabled && aCharSet->mAABitmapScaleAlways) {
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base_aafont = GetAASBBaseFont(aStretch, aCharSet);
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if (base_aafont) {
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use_scaled_font = PR_TRUE;
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SIZE_FONT_PRINTF(("anti-aliased bitmap scaled font: %s\n"
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" desired=%d, aa-scaled=%d, bitmap=%d, "
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"aa_bitmap=%d",
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aName, mPixelSize, scale_size, bitmap_size, base_aafont->mSize));
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}
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}
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//
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// if not already aasb scaling and
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// if we do not have a bitmap that is nearly the correct size
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//
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if (!use_scaled_font && !have_nearly_rightsized_bitmap) {
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// check if we can use an outline scaled font
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if (aStretch->mOutlineScaled) {
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scale_size = PR_MAX(mPixelSize, aCharSet->mOutlineScaleMin);
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if (ABS(mPixelSize-scale_size) < ABS(mPixelSize-bitmap_size)) {
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@ -2846,6 +2892,7 @@ nsFontMetricsGTK::PickASizeAndLoad(nsFontStretch* aStretch,
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(bitmap_size=NOT_FOUND_FONT_SIZE?0:bitmap_size)));
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}
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}
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// see if we can aasb (anti alias scaled bitmap)
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if (!use_scaled_font
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&& (bitmap_size<NOT_FOUND_FONT_SIZE) && gAABitmapScaleEnabled) {
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// if we do not have a near-the-right-size font or scalable font
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@ -2858,23 +2905,18 @@ nsFontMetricsGTK::PickASizeAndLoad(nsFontStretch* aStretch,
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// Try to get a size font to scale that is 2x larger
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// (but at least 16 pixel)
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//
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PRUint32 aa_target_size = MAX((scale_size*2), 16);
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base_aafont = FindNearestSize(aStretch, aa_target_size);
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NS_ASSERTION(base_aafont,
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"failed to find a base font for Anti-Aliased bitmap Scaling");
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base_aafont = GetAASBBaseFont(aStretch, aCharSet);
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if (base_aafont) {
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use_scaled_font = PR_TRUE;
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int aa_bitmap_size = base_aafont->mSize;
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bitmap_size = font->mSize;
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SIZE_FONT_PRINTF(("anti-aliased bitmap scaled font: %s\n"
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" desired=%d, aa-scaled=%d, bitmap=%d, "
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"aa_bitmap=%d",
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aName, mPixelSize, scale_size, bitmap_size, aa_bitmap_size));
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aName, mPixelSize, scale_size, bitmap_size, base_aafont->mSize));
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}
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}
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}
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// last resort: consider a bitmap scaled font (ugly!)
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if (!use_scaled_font && aStretch->mScalable) {
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// if we do not have any similarly sized font
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// use a bitmap scaled font (ugh!)
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scale_size = PR_MAX(mPixelSize, aCharSet->mBitmapScaleMin);
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double ratio = (bitmap_size / ((double) mPixelSize));
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if ((ratio < aCharSet->mBitmapUndersize)
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@ -3361,6 +3403,17 @@ SetFontLangGroupInfo(nsFontCharSetMap* aCharSetMap)
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else
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charSetInfo->mAABitmapUndersize = gAABitmapUndersize;
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PRBool val = PR_TRUE;
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name.Assign("font.scale.aa_bitmap.always.");
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name.Append(langGroup);
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rv = gPref->GetBoolPref(name.get(), &val);
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if (NS_SUCCEEDED(rv)) {
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charSetInfo->mAABitmapScaleAlways = val;
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SIZE_FONT_PRINTF(("%s = %d", name.get(),charSetInfo->mAABitmapScaleAlways));
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}
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else
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charSetInfo->mAABitmapScaleAlways = gAABitmapScaleAlways;
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percent = 0;
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name.Assign("font.scale.bitmap.oversize.");
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name.Append(langGroup);
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@ -179,6 +179,8 @@ public:
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nsFontGTK* AddToLoadedFontsList(nsFontGTK* aFont);
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nsFontGTK* FindNearestSize(nsFontStretch* aStretch, PRUint16 aSize);
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nsFontGTK* GetAASBBaseFont(nsFontStretch* aStretch,
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nsFontCharSetInfo* aCharSet);
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nsFontGTK* PickASizeAndLoad(nsFontStretch* aStretch,
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nsFontCharSetInfo* aCharSet,
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PRUnichar aChar,
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@ -225,6 +225,7 @@ pref("font.scale.outline.min", 6);
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// below a certian pixel size anti-aliased bitmat scaled fonts
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// produce poor results
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pref("font.scale.aa_bitmap.enable", true);
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pref("font.scale.aa_bitmap.always", false);
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pref("font.scale.aa_bitmap.min", 6);
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pref("font.scale.aa_bitmap.undersize", 80);
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pref("font.scale.aa_bitmap.oversize", 120);
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@ -239,24 +240,28 @@ pref("font.scale.bitmap.oversize", 120);
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pref("font.scale.outline.min.ja", 10);
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pref("font.scale.aa_bitmap.min.ja", 12);
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pref("font.scale.aa_bitmap.always.ja", false);
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pref("font.scale.bitmap.min.ja", 16);
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pref("font.scale.bitmap.undersize.ja", 80);
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pref("font.scale.bitmap.oversize.ja", 120);
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pref("font.scale.outline.min.ko", 10);
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pref("font.scale.aa_bitmap.min.ko", 12);
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pref("font.scale.aa_bitmap.always.ko", false);
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pref("font.scale.bitmap.min.ko", 16);
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pref("font.scale.bitmap.undersize.ko", 80);
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pref("font.scale.bitmap.oversize.ko", 120);
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pref("font.scale.outline.min.zh-CN", 10);
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pref("font.scale.aa_bitmap.min.zh-CN", 12);
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pref("font.scale.aa_bitmap.always.zh-CN", false);
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pref("font.scale.bitmap.min.zh-CN", 16);
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pref("font.scale.bitmap.undersize.zh-CN", 80);
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pref("font.scale.bitmap.oversize.zh-CN", 120);
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pref("font.scale.outline.min.zh-TW", 10);
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pref("font.scale.aa_bitmap.min.zh-TW", 12);
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pref("font.scale.aa_bitmap.always.zh-TW", false);
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pref("font.scale.bitmap.min.zh-TW", 16);
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pref("font.scale.bitmap.undersize.zh-TW", 80);
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pref("font.scale.bitmap.oversize.zh-TW", 120);
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