Re: Fix text rotation problem in GM_ADVANCED graphics mode caused by incorrect implementation of GetTextExtentPointW().
Ralf Habacker ralf.habacker@freenet.de writes:
With other patches i have been told to implement such stuff in the dib driver. Unfortunally this do not works in this case, because in the top level function it looks like having driver specific stuff using display coordinates.
It would still most likely have to be in the driver, though maybe the driver would not be calling that exact entry point. In any case, you can't change the DC transform like this. and you'll need test cases.
On 01.10.2013 12:12, Alexandre Julliard wrote:
Ralf Habacker ralf.habacker@freenet.de writes:
With other patches i have been told to implement such stuff in the dib driver. Unfortunally this do not works in this case, because in the top level function it looks like having driver specific stuff using display coordinates.
It would still most likely have to be in the driver,
which is freetype_GetTextExtentExPoint() ?
though maybe the driver would not be calling that exact entry point.
not sure i understand right:
GetTextExtentExPointW() calls get_char_positions(), which runs dev->funcs->pGetTextExtentExPoint(), which is mapped to freetype_GetTextExtentExPoint(), which is in the driver. Which entry point your are refering else ?
In any case, you can't change the DC transform like this
then a real solution requires to move the transformation to logical coordinates stuff in BOOL GetTextExtentExPointW() to freetype_GetTextExtentExPoint() and to manipulate the related matrixes in freetype_GetTextExtentExPoint() directly wen using GM_ADVANCED ?
and you'll need test cases.
Do you mean in detail:
1. Create a specific font 2. Run GetTextExtentExPointW() which specific parameters 3. check if it results expected values
Regards Ralf
Ralf Habacker ralf@habacker.de writes:
On 01.10.2013 12:12, Alexandre Julliard wrote:
Ralf Habacker ralf.habacker@freenet.de writes:
With other patches i have been told to implement such stuff in the dib driver. Unfortunally this do not works in this case, because in the top level function it looks like having driver specific stuff using display coordinates.
It would still most likely have to be in the driver,
which is freetype_GetTextExtentExPoint() ?
though maybe the driver would not be calling that exact entry point.
not sure i understand right:
GetTextExtentExPointW() calls get_char_positions(), which runs dev->funcs->pGetTextExtentExPoint(), which is mapped to freetype_GetTextExtentExPoint(), which is in the driver. Which entry point your are refering else ?
The various text rendering entry points in the graphics drivers.
In any case, you can't change the DC transform like this
then a real solution requires to move the transformation to logical coordinates stuff in BOOL GetTextExtentExPointW() to freetype_GetTextExtentExPoint() and to manipulate the related matrixes in freetype_GetTextExtentExPoint() directly wen using GM_ADVANCED ?
No, I don't think so. The transform is only used to determine the font scaling factor.
and you'll need test cases.
Do you mean in detail:
- Create a specific font
- Run GetTextExtentExPointW() which specific parameters
- check if it results expected values
Well, yes, that's what all tests do.
On 01.10.2013 12:40, Alexandre Julliard wrote:
Ralf Habacker ralf@habacker.de writes:
On 01.10.2013 12:12, Alexandre Julliard wrote:
Ralf Habacker ralf.habacker@freenet.de writes:
With other patches i have been told to implement such stuff in the dib driver. Unfortunally this do not works in this case, because in the top level function it looks like having driver specific stuff using display coordinates.
It would still most likely have to be in the driver,
which is freetype_GetTextExtentExPoint() ?
though maybe the driver would not be calling that exact entry point.
not sure i understand right:
GetTextExtentExPointW() calls get_char_positions(), which runs dev->funcs->pGetTextExtentExPoint(), which is mapped to freetype_GetTextExtentExPoint(), which is in the driver. Which entry point your are refering else ?
The various text rendering entry points in the graphics drivers.
In any case, you can't change the DC transform like this
then a real solution requires to move the transformation to logical coordinates stuff in BOOL GetTextExtentExPointW() to freetype_GetTextExtentExPoint() and to manipulate the related matrixes in freetype_GetTextExtentExPoint() directly wen using GM_ADVANCED ?
No, I don't think so. The transform is only used to determine the font scaling factor.
how then ?
and you'll need test cases.
Do you mean in detail:
- Create a specific font
- Run GetTextExtentExPointW() which specific parameters
- check if it results expected values
Well, yes, that's what all tests do.
On 01.10.2013 12:40, Alexandre Julliard wrote:
Ralf Habacker ralf@habacker.de writes:
On 01.10.2013 12:12, Alexandre Julliard wrote:
Ralf Habacker ralf.habacker@freenet.de writes:
With other patches i have been told to implement such stuff in the dib driver. Unfortunally this do not works in this case, because in the top level function it looks like having driver specific stuff using display coordinates.
It would still most likely have to be in the driver,
which is freetype_GetTextExtentExPoint() ?
though maybe the driver would not be calling that exact entry point.
not sure i understand right:
GetTextExtentExPointW() calls get_char_positions(), which runs dev->funcs->pGetTextExtentExPoint(), which is mapped to freetype_GetTextExtentExPoint(), which is in the driver. Which entry point your are refering else ?
The various text rendering entry points in the graphics drivers.
You mean there are more affected places ?
In any case, you can't change the DC transform like this
then a real solution requires to move the transformation to logical coordinates stuff in BOOL GetTextExtentExPointW() to freetype_GetTextExtentExPoint() and to manipulate the related matrixes in freetype_GetTextExtentExPoint() directly wen using GM_ADVANCED ?
No, I don't think so. The transform is only used to determine the font scaling factor.
the recent implementation of get_glyph_outline() uses in GM_ADVANCED mode a scale which depends somehow on the rotation angle.
I got better results with saving the "use GM_ADVANCED case" in font->font_desc.advanced_graphics_mode and the following hunks for freetype.c
@@ -6426,10 +6426,24 @@ static DWORD get_glyph_outline(GdiFont *incoming_font, UINT glyph, UINT format, worldMat.xy = -FTFixedFromFloat(font->font_desc.matrix.eM21); worldMat.yx = -FTFixedFromFloat(font->font_desc.matrix.eM12); worldMat.yy = FTFixedFromFloat(font->font_desc.matrix.eM22); pFT_Matrix_Multiply(&worldMat, &transMat); - pFT_Matrix_Multiply(&worldMat, &transMatUnrotated); pFT_Matrix_Multiply(&worldMat, &transMatTategaki); - needsTransform = TRUE; + if (font->font_desc.advanced_graphics_mode) { + worldMat.xx = FTFixedFromFloat(1.0/font->font_desc.matrix.eM11); + worldMat.xy = -FTFixedFromFloat(font->font_desc.matrix.eM21); + worldMat.yx = -FTFixedFromFloat(font->font_desc.matrix.eM12); + worldMat.yy = FTFixedFromFloat(1.0/font->font_desc.matrix.eM22); + } + else { + worldMat = identityMat; + } + + pFT_Matrix_Multiply(&worldMat, &transMatUnrotated); + needsTransform = TRUE; }
and
@@ -6571,35 +6590,50 @@ static DWORD get_glyph_outline(GdiFont *incoming_font, UINT glyph, UINT format, origin_y = top; }
+ if (font->font_desc.advanced_graphics_mode) + pFT_Vector_Transform(&vec, &transMatUnrotated); + else + pFT_Vector_Transform(&vec, &transMat); +
which works except for using 90° and 270° world transformations angles. Transforming back the list of character width in the top level function GetTextExtentExPointW(). The transformation is done with
static inline INT INTERNAL_XDSTOWS(DC *dc, INT width) { double floatWidth;
floatWidth = (double)width * dc->xformVport2World.eM11; /* Round to integers */ return GDI_ROUND(floatWidth); }
dc->xformVport2World.eM11 is zero in the mentioned angles, so it will always return zero, which means at now the submitted patch is the only working solution.
From what i can see an alternative would require to move the device to
logical back transformation into get_glyph_outline() and to refactor all function get_glyph_outline() is called from.
Regards Ralf
On 01.10.2013 12:12, Alexandre Julliard wrote:
Ralf Habacker ralf.habacker@freenet.de writes:
With other patches i have been told to implement such stuff in the dib driver. Unfortunally this do not works in this case, because in the top level function it looks like having driver specific stuff using display coordinates.
It would still most likely have to be in the driver, though maybe the driver would not be calling that exact entry point. In any case, you can't change the DC transform like this.
You are refering to the usage of setting hard coded values ? Instead I should decompose the rotation and reset only that part ?
Ralf
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Alexandre Julliard -
Ralf Habacker -
Ralf Habacker