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Diffstat (limited to 'src/3rdparty/freetype/src/smooth/ftsmooth.c')
-rw-r--r--src/3rdparty/freetype/src/smooth/ftsmooth.c381
1 files changed, 167 insertions, 214 deletions
diff --git a/src/3rdparty/freetype/src/smooth/ftsmooth.c b/src/3rdparty/freetype/src/smooth/ftsmooth.c
index 3620550534..ef176bdf1e 100644
--- a/src/3rdparty/freetype/src/smooth/ftsmooth.c
+++ b/src/3rdparty/freetype/src/smooth/ftsmooth.c
@@ -4,7 +4,7 @@
/* */
/* Anti-aliasing renderer interface (body). */
/* */
-/* Copyright 2000-2015 by */
+/* Copyright 2000-2018 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@@ -31,12 +31,7 @@
static FT_Error
ft_smooth_init( FT_Renderer render )
{
- FT_Library library = FT_MODULE_LIBRARY( render );
-
-
- render->clazz->raster_class->raster_reset( render->raster,
- library->raster_pool,
- library->raster_pool_size );
+ render->clazz->raster_class->raster_reset( render->raster, NULL, 0 );
return 0;
}
@@ -87,7 +82,7 @@
FT_GlyphSlot slot,
FT_BBox* cbox )
{
- FT_MEM_ZERO( cbox, sizeof ( *cbox ) );
+ FT_ZERO( cbox );
if ( slot->format == render->glyph_format )
FT_Outline_Get_CBox( &slot->outline, cbox );
@@ -102,26 +97,17 @@
const FT_Vector* origin,
FT_Render_Mode required_mode )
{
- FT_Error error;
+ FT_Error error = FT_Err_Ok;
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_Int hmul = mode == FT_RENDER_MODE_LCD;
- FT_Int vmul = mode == FT_RENDER_MODE_LCD_V;
+ FT_Int hmul = ( mode == FT_RENDER_MODE_LCD );
+ FT_Int vmul = ( mode == FT_RENDER_MODE_LCD_V );
FT_Raster_Params params;
- FT_Bool have_outline_shifted = FALSE;
- FT_Bool have_buffer = FALSE;
-
/* check glyph image format */
if ( slot->format != render->glyph_format )
@@ -137,91 +123,6 @@
goto Exit;
}
- if ( origin )
- {
- x_shift = origin->x;
- y_shift = origin->y;
- }
-
- /* 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 );
- cbox.yMin = FT_PIX_FLOOR( cbox.yMin + y_shift );
- 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;
-
-#ifndef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
- width_org = width;
- height_org = height;
-#endif
-
- pitch = width;
- if ( hmul )
- {
- width *= 3;
- pitch = FT_PAD_CEIL( width, 4 );
- }
-
- if ( vmul )
- height *= 3;
-
-#ifdef FT_CONFIG_OPTION_SUBPIXEL_RENDERING
-
- if ( slot->library->lcd_filter_func )
- {
- FT_Int extra = slot->library->lcd_extra;
-
-
- if ( hmul )
- {
- x_shift += 64 * ( extra >> 1 );
- x_left -= extra >> 1;
- width += 3 * extra;
- pitch = FT_PAD_CEIL( width, 4 );
- }
-
- if ( vmul )
- {
- y_shift += 64 * ( extra >> 1 );
- 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 ||
- x_left < FT_INT_MIN || y_top < FT_INT_MIN )
- {
- 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 )
- {
- FT_ERROR(( "ft_smooth_render_generic: glyph too large: %u x %u\n",
- width, height ));
- error = FT_THROW( Raster_Overflow );
- goto Exit;
- }
-
/* release old bitmap buffer */
if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP )
{
@@ -229,30 +130,30 @@
slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP;
}
+ ft_glyphslot_preset_bitmap( slot, mode, origin );
+
/* allocate new one */
- if ( FT_ALLOC( bitmap->buffer, (FT_ULong)( pitch * height ) ) )
+ if ( FT_ALLOC_MULT( bitmap->buffer, bitmap->rows, bitmap->pitch ) )
goto Exit;
- else
- have_buffer = TRUE;
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;
+ x_shift = 64 * -slot->bitmap_left;
+ y_shift = 64 * -slot->bitmap_top;
+ if ( bitmap->pixel_mode == FT_PIXEL_MODE_LCD_V )
+ y_shift += 64 * (FT_Int)bitmap->rows / 3;
+ else
+ y_shift += 64 * (FT_Int)bitmap->rows;
- bitmap->pixel_mode = FT_PIXEL_MODE_GRAY;
- bitmap->num_grays = 256;
- bitmap->width = (unsigned int)width;
- bitmap->rows = (unsigned int)height;
- bitmap->pitch = pitch;
+ if ( origin )
+ {
+ x_shift += origin->x;
+ y_shift += origin->y;
+ }
/* translate outline to render it into the bitmap */
if ( x_shift || y_shift )
- {
FT_Outline_Translate( outline, x_shift, y_shift );
- have_outline_shifted = TRUE;
- }
/* set up parameters */
params.target = bitmap;
@@ -299,80 +200,143 @@
if ( error )
goto Exit;
- if ( slot->library->lcd_filter_func )
- slot->library->lcd_filter_func( bitmap, mode, slot->library );
+ /* finally apply filtering */
+ if ( hmul || vmul )
+ {
+ FT_Byte* lcd_weights;
+ FT_Bitmap_LcdFilterFunc lcd_filter_func;
-#else /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
- /* render outline into bitmap */
- error = render->raster_render( render->raster, &params );
- if ( error )
- goto Exit;
+ /* Per-face LCD filtering takes priority if set up. */
+ if ( slot->face && slot->face->internal->lcd_filter_func )
+ {
+ lcd_weights = slot->face->internal->lcd_weights;
+ lcd_filter_func = slot->face->internal->lcd_filter_func;
+ }
+ else
+ {
+ lcd_weights = slot->library->lcd_weights;
+ lcd_filter_func = slot->library->lcd_filter_func;
+ }
- /* expand it horizontally */
- if ( hmul )
+ if ( lcd_filter_func )
+ lcd_filter_func( bitmap, mode, lcd_weights );
+ }
+
+#else /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
+
+ if ( hmul ) /* lcd */
{
- FT_Byte* line = bitmap->buffer;
- FT_UInt hh;
+ FT_Byte* line;
+ FT_Byte* temp = NULL;
+ FT_UInt i, j;
+ unsigned int height = bitmap->rows;
+ unsigned int width = bitmap->width;
+ int pitch = bitmap->pitch;
- for ( hh = height_org; hh > 0; hh--, line += pitch )
- {
- FT_UInt xx;
- FT_Byte* end = line + width;
+ /* Render 3 separate monochrome bitmaps, shifting the outline */
+ /* by 1/3 pixel. */
+ width /= 3;
- for ( xx = width_org; xx > 0; xx-- )
- {
- FT_UInt pixel = line[xx-1];
+ bitmap->buffer += width;
+ error = render->raster_render( render->raster, &params );
+ if ( error )
+ goto Exit;
- end[-3] = (FT_Byte)pixel;
- end[-2] = (FT_Byte)pixel;
- end[-1] = (FT_Byte)pixel;
- end -= 3;
+ FT_Outline_Translate( outline, -21, 0 );
+ x_shift -= 21;
+ bitmap->buffer += width;
+
+ error = render->raster_render( render->raster, &params );
+ if ( error )
+ goto Exit;
+
+ FT_Outline_Translate( outline, 42, 0 );
+ x_shift += 42;
+ bitmap->buffer -= 2 * width;
+
+ error = render->raster_render( render->raster, &params );
+ if ( error )
+ goto Exit;
+
+ /* XXX: Rearrange the bytes according to FT_PIXEL_MODE_LCD. */
+ /* XXX: It is more efficient to render every third byte above. */
+
+ if ( FT_ALLOC( temp, (FT_ULong)pitch ) )
+ goto Exit;
+
+ for ( i = 0; i < height; i++ )
+ {
+ line = bitmap->buffer + i * (FT_ULong)pitch;
+ for ( j = 0; j < width; j++ )
+ {
+ temp[3 * j ] = line[j];
+ temp[3 * j + 1] = line[j + width];
+ temp[3 * j + 2] = line[j + width + width];
}
+ FT_MEM_COPY( line, temp, pitch );
}
- }
- /* expand it vertically */
- if ( vmul )
+ FT_FREE( temp );
+ }
+ else if ( vmul ) /* lcd_v */
{
- FT_Byte* read = bitmap->buffer + ( height - height_org ) * pitch;
- FT_Byte* write = bitmap->buffer;
- FT_UInt hh;
+ int pitch = bitmap->pitch;
- for ( hh = height_org; hh > 0; hh-- )
- {
- ft_memcpy( write, read, pitch );
- write += pitch;
+ /* Render 3 separate monochrome bitmaps, shifting the outline */
+ /* by 1/3 pixel. Triple the pitch to render on each third row. */
+ bitmap->pitch *= 3;
+ bitmap->rows /= 3;
- ft_memcpy( write, read, pitch );
- write += pitch;
+ bitmap->buffer += pitch;
- ft_memcpy( write, read, pitch );
- write += pitch;
- read += pitch;
- }
- }
+ error = render->raster_render( render->raster, &params );
+ if ( error )
+ goto Exit;
-#endif /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
+ FT_Outline_Translate( outline, 0, 21 );
+ y_shift += 21;
+ bitmap->buffer += pitch;
+
+ error = render->raster_render( render->raster, &params );
+ if ( error )
+ goto Exit;
+
+ FT_Outline_Translate( outline, 0, -42 );
+ y_shift -= 42;
+ bitmap->buffer -= 2 * pitch;
- /* everything is fine; don't deallocate buffer */
- have_buffer = FALSE;
+ error = render->raster_render( render->raster, &params );
+ if ( error )
+ goto Exit;
- error = FT_Err_Ok;
+ bitmap->pitch /= 3;
+ bitmap->rows *= 3;
+ }
+ else /* grayscale */
+ error = render->raster_render( render->raster, &params );
+
+#endif /* !FT_CONFIG_OPTION_SUBPIXEL_RENDERING */
Exit:
- if ( have_outline_shifted )
- FT_Outline_Translate( outline, -x_shift, -y_shift );
- if ( have_buffer )
+ if ( !error )
+ {
+ /* everything is fine; the glyph is now officially a bitmap */
+ slot->format = FT_GLYPH_FORMAT_BITMAP;
+ }
+ else if ( slot->internal->flags & FT_GLYPH_OWN_BITMAP )
{
FT_FREE( bitmap->buffer );
slot->internal->flags &= ~FT_GLYPH_OWN_BITMAP;
}
+ if ( x_shift || y_shift )
+ FT_Outline_Translate( outline, -x_shift, -y_shift );
+
return error;
}
@@ -399,14 +363,8 @@
FT_Render_Mode mode,
const FT_Vector* origin )
{
- FT_Error error;
-
- error = ft_smooth_render_generic( render, slot, mode, origin,
- FT_RENDER_MODE_LCD );
- if ( !error )
- slot->bitmap.pixel_mode = FT_PIXEL_MODE_LCD;
-
- return error;
+ return ft_smooth_render_generic( render, slot, mode, origin,
+ FT_RENDER_MODE_LCD );
}
@@ -417,18 +375,13 @@
FT_Render_Mode mode,
const FT_Vector* origin )
{
- FT_Error error;
-
- error = ft_smooth_render_generic( render, slot, mode, origin,
- FT_RENDER_MODE_LCD_V );
- if ( !error )
- slot->bitmap.pixel_mode = FT_PIXEL_MODE_LCD_V;
-
- return error;
+ return ft_smooth_render_generic( render, slot, mode, origin,
+ FT_RENDER_MODE_LCD_V );
}
- FT_DEFINE_RENDERER( ft_smooth_renderer_class,
+ FT_DEFINE_RENDERER(
+ ft_smooth_renderer_class,
FT_MODULE_RENDERER,
sizeof ( FT_RendererRec ),
@@ -437,25 +390,25 @@
0x10000L,
0x20000L,
- 0, /* module specific interface */
+ NULL, /* module specific interface */
- (FT_Module_Constructor)ft_smooth_init,
- (FT_Module_Destructor) 0,
- (FT_Module_Requester) 0
- ,
+ (FT_Module_Constructor)ft_smooth_init, /* module_init */
+ (FT_Module_Destructor) NULL, /* module_done */
+ (FT_Module_Requester) NULL, /* get_interface */
FT_GLYPH_FORMAT_OUTLINE,
- (FT_Renderer_RenderFunc) ft_smooth_render,
- (FT_Renderer_TransformFunc)ft_smooth_transform,
- (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox,
- (FT_Renderer_SetModeFunc) ft_smooth_set_mode,
+ (FT_Renderer_RenderFunc) ft_smooth_render, /* render_glyph */
+ (FT_Renderer_TransformFunc)ft_smooth_transform, /* transform_glyph */
+ (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox, /* get_glyph_cbox */
+ (FT_Renderer_SetModeFunc) ft_smooth_set_mode, /* set_mode */
- (FT_Raster_Funcs*) &FT_GRAYS_RASTER_GET
+ (FT_Raster_Funcs*)&FT_GRAYS_RASTER_GET /* raster_class */
)
- FT_DEFINE_RENDERER( ft_smooth_lcd_renderer_class,
+ FT_DEFINE_RENDERER(
+ ft_smooth_lcd_renderer_class,
FT_MODULE_RENDERER,
sizeof ( FT_RendererRec ),
@@ -464,24 +417,25 @@
0x10000L,
0x20000L,
- 0, /* module specific interface */
+ NULL, /* module specific interface */
- (FT_Module_Constructor)ft_smooth_init,
- (FT_Module_Destructor) 0,
- (FT_Module_Requester) 0
- ,
+ (FT_Module_Constructor)ft_smooth_init, /* module_init */
+ (FT_Module_Destructor) NULL, /* module_done */
+ (FT_Module_Requester) NULL, /* get_interface */
FT_GLYPH_FORMAT_OUTLINE,
- (FT_Renderer_RenderFunc) ft_smooth_render_lcd,
- (FT_Renderer_TransformFunc)ft_smooth_transform,
- (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox,
- (FT_Renderer_SetModeFunc) ft_smooth_set_mode,
+ (FT_Renderer_RenderFunc) ft_smooth_render_lcd, /* render_glyph */
+ (FT_Renderer_TransformFunc)ft_smooth_transform, /* transform_glyph */
+ (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox, /* get_glyph_cbox */
+ (FT_Renderer_SetModeFunc) ft_smooth_set_mode, /* set_mode */
- (FT_Raster_Funcs*) &FT_GRAYS_RASTER_GET
+ (FT_Raster_Funcs*)&FT_GRAYS_RASTER_GET /* raster_class */
)
- FT_DEFINE_RENDERER( ft_smooth_lcdv_renderer_class,
+
+ FT_DEFINE_RENDERER(
+ ft_smooth_lcdv_renderer_class,
FT_MODULE_RENDERER,
sizeof ( FT_RendererRec ),
@@ -490,21 +444,20 @@
0x10000L,
0x20000L,
- 0, /* module specific interface */
+ NULL, /* module specific interface */
- (FT_Module_Constructor)ft_smooth_init,
- (FT_Module_Destructor) 0,
- (FT_Module_Requester) 0
- ,
+ (FT_Module_Constructor)ft_smooth_init, /* module_init */
+ (FT_Module_Destructor) NULL, /* module_done */
+ (FT_Module_Requester) NULL, /* get_interface */
FT_GLYPH_FORMAT_OUTLINE,
- (FT_Renderer_RenderFunc) ft_smooth_render_lcd_v,
- (FT_Renderer_TransformFunc)ft_smooth_transform,
- (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox,
- (FT_Renderer_SetModeFunc) ft_smooth_set_mode,
+ (FT_Renderer_RenderFunc) ft_smooth_render_lcd_v, /* render_glyph */
+ (FT_Renderer_TransformFunc)ft_smooth_transform, /* transform_glyph */
+ (FT_Renderer_GetCBoxFunc) ft_smooth_get_cbox, /* get_glyph_cbox */
+ (FT_Renderer_SetModeFunc) ft_smooth_set_mode, /* set_mode */
- (FT_Raster_Funcs*) &FT_GRAYS_RASTER_GET
+ (FT_Raster_Funcs*)&FT_GRAYS_RASTER_GET /* raster_class */
)