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freetype2
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Code Issues 4 Releases Wiki Activity

[smooth] Improve code readability. 

* src/smooth/ftsmooth.c (ft_smooth_render_generic): Rearrange code.
This commit is contained in:
Alexei Podtelezhnikov 2014-10-31 22:12:37 -04:00
parent e1efe0a2fc
commit 525d4876be
2 changed files with 43 additions and 39 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2014-10-31 Alexei Podtelezhnikov <apodtele@gmail.com>
[smooth] Improve code readability.
* src/smooth/ftsmooth.c (ft_smooth_render_generic): Rearrange code.
2014-10-31 Alexei Podtelezhnikov <apodtele@gmail.com>
[smooth] Reduce outline translations during rendering.

76
src/smooth/ftsmooth.c
View File

@ -103,19 +103,19 @@
FT_Render_Mode required_mode )
{
FT_Error error;
FT_Outline* outline = NULL;
FT_Outline* outline = &slot->outline;
FT_Bitmap* bitmap = &slot->bitmap;
FT_Memory memory = render->root.memory;
FT_BBox cbox;
FT_Pos x_shift = 0;
FT_Pos y_shift = 0;
FT_Pos x_left, y_top;
FT_Pos width, height, pitch;
#ifndef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
FT_Pos height_org, width_org;
#endif
FT_Bitmap* bitmap = &slot->bitmap;
FT_Memory memory = render->root.memory;
FT_Int hmul = mode == FT_RENDER_MODE_LCD;
FT_Int vmul = mode == FT_RENDER_MODE_LCD_V;
FT_Pos x_shift = 0;
FT_Pos y_shift = 0;
FT_Pos x_left, y_top;
FT_Raster_Params params;
@ -137,9 +137,6 @@
goto Exit;
}
outline = &slot->outline;
/* account for the oigin shift */
if ( origin )
{
x_shift = origin->x;
@ -147,6 +144,7 @@
}
/* compute the control box, and grid fit it */
/* taking into account the origin shift */
FT_Outline_Get_CBox( outline, &cbox );
cbox.xMin = FT_PIX_FLOOR( cbox.xMin + x_shift );
@ -154,6 +152,12 @@
cbox.xMax = FT_PIX_CEIL( cbox.xMax + x_shift );
cbox.yMax = FT_PIX_CEIL( cbox.yMax + y_shift );
x_shift -= cbox.xMin;
y_shift -= cbox.yMin;
x_left = cbox.xMin >> 6;
y_top = cbox.yMax >> 6;
width = (FT_ULong)( cbox.xMax - cbox.xMin ) >> 6;
height = (FT_ULong)( cbox.yMax - cbox.yMin ) >> 6;
@ -165,19 +169,13 @@
pitch = width;
if ( hmul )
{
width = width * 3;
pitch = FT_PAD_CEIL( width, 4 );
width *= 3;
pitch = FT_PAD_CEIL( width, 4 );
}
if ( vmul )
height *= 3;
x_shift -= cbox.xMin;
y_shift -= cbox.yMin;
x_left = cbox.xMin >> 6;
y_top = cbox.yMax >> 6;
#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
if ( slot->library->lcd_filter_func )
@ -188,21 +186,31 @@
if ( hmul )
{
x_shift += 64 * ( extra >> 1 );
x_left -= extra >> 1;
width += 3 * extra;
pitch = FT_PAD_CEIL( width, 4 );
x_left -= extra >> 1;
}
if ( vmul )
{
y_shift += 64 * ( extra >> 1 );
height += 3 * extra;
y_top += extra >> 1;
height += 3 * extra;
}
}
#endif
/*
* XXX: on 16bit system, we return an error for huge bitmap
* to prevent an overflow.
*/
if ( x_left > FT_INT_MAX || y_top > FT_INT_MAX )
{
error = FT_THROW( Invalid_Pixel_Size );
goto Exit;
}
/* Required check is (pitch * height < FT_ULONG_MAX), */
/* but we care realistic cases only. Always pitch <= width. */
if ( width > 0x7FFF || height > 0x7FFF )
@ -213,12 +221,6 @@
goto Exit;
}
bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;
bitmap->num_grays = 256;
bitmap->width = width;
bitmap->rows = height;
bitmap->pitch = pitch;
/* release old bitmap buffer */
if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP )
{
@ -234,6 +236,16 @@
slot->internal->flags |= FT_GLYPH_OWN_BITMAP;
slot->format = FT_GLYPH_FORMAT_BITMAP;
slot->bitmap_left = (FT_Int)x_left;
slot->bitmap_top = (FT_Int)y_top;
bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;
bitmap->num_grays = 256;
bitmap->width = width;
bitmap->rows = height;
bitmap->pitch = pitch;
/* translate outline to render it into the bitmap */
if ( x_shift || y_shift )
{
@ -346,20 +358,6 @@
#endif /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
/*
* XXX: on 16bit system, we return an error for huge bitmap
* to prevent an overflow.
*/
if ( x_left > FT_INT_MAX || y_top > FT_INT_MAX )
{
error = FT_THROW( Invalid_Pixel_Size );
goto Exit;
}
slot->format = FT_GLYPH_FORMAT_BITMAP;
slot->bitmap_left = (FT_Int)x_left;
slot->bitmap_top = (FT_Int)y_top;
/* everything is fine; don't deallocate buffer */
have_buffer = FALSE;