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gdi32: Perform font height scaling with higher precision.

This commit is contained in:
Dmitry Timoshkov 2008-06-24 16:10:27 +09:00 committed by Alexandre Julliard
parent ade4132b25
commit e378795970
1 changed files with 30 additions and 21 deletions
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51
dlls/gdi32/freetype.c
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@ -328,7 +328,7 @@ struct tagGdiFont {
INT orientation;
FONT_DESC font_desc;
LONG aveWidth, ppem;
float scale_y;
double scale_y;
SHORT yMax;
SHORT yMin;
DWORD ntmFlags;
@ -807,7 +807,7 @@ static inline BOOL is_win9x(void)
in the highest 16 bits and the decimal part in the lowest 16 bits of the FT_Fixed.
It fails if the integer part of the float number is greater than SHORT_MAX.
*/
static inline FT_Fixed FT_FixedFromFloat(float f)
static inline FT_Fixed FT_FixedFromFloat(double f)
{
short value = f;
unsigned short fract = (f - value) * 0xFFFF;
@ -2681,11 +2681,11 @@ static LONG calc_ppem_for_height(FT_Face ft_face, LONG height)
if(height > 0) {
if(pOS2->usWinAscent + pOS2->usWinDescent == 0)
ppem = ft_face->units_per_EM * height /
(pHori->Ascender - pHori->Descender);
ppem = MulDiv(ft_face->units_per_EM, height,
pHori->Ascender - pHori->Descender);
else
ppem = ft_face->units_per_EM * height /
(pOS2->usWinAscent + pOS2->usWinDescent);
ppem = MulDiv(ft_face->units_per_EM, height,
pOS2->usWinAscent + pOS2->usWinDescent);
}
else
ppem = -height;
@ -2785,6 +2785,7 @@ static FT_Face OpenFontFace(GdiFont *font, Face *face, LONG width, LONG height)
font->ppem = load_VDMX(font, height);
if(font->ppem == 0)
font->ppem = calc_ppem_for_height(ft_face, height);
TRACE("height %d => ppem %d\n", height, font->ppem);
if((err = pFT_Set_Pixel_Sizes(ft_face, 0, font->ppem)) != 0)
WARN("FT_Set_Pixel_Sizes %d, %d rets %x\n", 0, font->ppem, err);
@ -3271,6 +3272,11 @@ GdiFont *WineEngCreateFontInstance(DC *dc, HFONT hfont)
lf.lfWeight, lf.lfPitchAndFamily, lf.lfCharSet, lf.lfOrientation,
lf.lfEscapement);
TRACE("DC transform %f %f %f %f %f %f\n",
dc->xformWorld2Vport.eM11, dc->xformWorld2Vport.eM12,
dc->xformWorld2Vport.eM21, dc->xformWorld2Vport.eM22,
dc->xformWorld2Vport.eDx, dc->xformWorld2Vport.eDy);
/* check the cache first */
if((ret = find_in_cache(hfont, &lf, &dc->xformWorld2Vport, can_use_bitmap)) != NULL) {
TRACE("returning cached gdiFont(%p) for hFont %p\n", ret, hfont);
@ -4276,16 +4282,19 @@ DWORD WineEngGetGlyphOutline(GdiFont *incoming_font, UINT glyph, UINT format,
INT left, right, top = 0, bottom = 0, adv, lsb, bbx;
FT_Angle angle = 0;
FT_Int load_flags = FT_LOAD_DEFAULT | FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH;
float widthRatio = 1.0;
double widthRatio = 1.0;
FT_Matrix transMat = identityMat;
BOOL needsTransform = FALSE;
BOOL tategaki = (font->GSUB_Table != NULL);
UINT original_index;
TRACE("%p, %04x, %08x, %p, %08x, %p, %p\n", font, glyph, format, lpgm,
buflen, buf, lpmat);
TRACE("font transform %f %f %f %f\n",
font->font_desc.matrix.eM11, font->font_desc.matrix.eM12,
font->font_desc.matrix.eM21, font->font_desc.matrix.eM22);
EnterCriticalSection( &freetype_cs );
if(format & GGO_GLYPH_INDEX) {
@ -4331,8 +4340,8 @@ DWORD WineEngGetGlyphOutline(GdiFont *incoming_font, UINT glyph, UINT format,
/* Scaling factor */
if (font->aveWidth && font->potm)
{
widthRatio = (float)font->aveWidth * font->font_desc.matrix.eM11;
widthRatio /= (float)font->potm->otmTextMetrics.tmAveCharWidth;
widthRatio = (double)font->aveWidth * font->font_desc.matrix.eM11;
widthRatio /= (double)font->potm->otmTextMetrics.tmAveCharWidth;
}
else
widthRatio = font->scale_y;
@ -4372,7 +4381,7 @@ DWORD WineEngGetGlyphOutline(GdiFont *incoming_font, UINT glyph, UINT format,
if(font->orientation && !tategaki) {
FT_Matrix rotationMat;
FT_Vector vecAngle;
angle = FT_FixedFromFloat((float)font->orientation / 10.0);
angle = FT_FixedFromFloat((double)font->orientation / 10.0);
pFT_Vector_Unit(&vecAngle, angle);
rotationMat.xx = vecAngle.x;
rotationMat.xy = -vecAngle.y;
@ -4847,24 +4856,24 @@ static BOOL get_bitmap_text_metrics(GdiFont *font)
static void scale_font_metrics(const GdiFont *font, LPTEXTMETRICW ptm)
{
float scale_x;
double scale_x;
if (font->aveWidth)
{
scale_x = (float)font->aveWidth * font->font_desc.matrix.eM11;
scale_x /= (float)font->potm->otmTextMetrics.tmAveCharWidth;
scale_x = (double)font->aveWidth * font->font_desc.matrix.eM11;
scale_x /= (double)font->potm->otmTextMetrics.tmAveCharWidth;
}
else
scale_x = font->scale_y;
ptm->tmHeight = (float)ptm->tmHeight * font->scale_y;
ptm->tmAscent = (float)ptm->tmAscent * font->scale_y;
ptm->tmDescent = (float)ptm->tmDescent * font->scale_y;
ptm->tmInternalLeading = (float)ptm->tmInternalLeading * font->scale_y;
ptm->tmExternalLeading = (float)ptm->tmExternalLeading * font->scale_y;
ptm->tmHeight = (double)ptm->tmHeight * font->scale_y;
ptm->tmAscent = (double)ptm->tmAscent * font->scale_y;
ptm->tmDescent = (double)ptm->tmDescent * font->scale_y;
ptm->tmInternalLeading = (double)ptm->tmInternalLeading * font->scale_y;
ptm->tmExternalLeading = (double)ptm->tmExternalLeading * font->scale_y;
ptm->tmAveCharWidth = (float)ptm->tmAveCharWidth * scale_x;
ptm->tmMaxCharWidth = (float)ptm->tmMaxCharWidth * scale_x;
ptm->tmAveCharWidth = (double)ptm->tmAveCharWidth * scale_x;
ptm->tmMaxCharWidth = (double)ptm->tmMaxCharWidth * scale_x;
}
/*************************************************************