@ -48,7 +48,8 @@
# ifdef IMGUI_ENABLE_FREETYPE_LUNASVG
# include FT_OTSVG_H // <freetype/otsvg.h>
# include FT_BBOX_H // <freetype/ftbbox.h>
# include <lunasvg.h>
# include <algorithm>
# include <lunasvg_c.h>
# if !((FREETYPE_MAJOR >= 2) && (FREETYPE_MINOR >= 12))
# error IMGUI_ENABLE_FREETYPE_LUNASVG requires FreeType version >= 2.12
# endif
@ -835,11 +836,26 @@ void ImGuiFreeType::SetAllocatorFunctions(void* (*alloc_func)(size_t sz, void* u
// The original code from the demo is licensed under CeCILL-C Free Software License Agreement (https://gitlab.freedesktop.org/freetype/freetype/-/blob/master/LICENSE.TXT)
struct LunasvgPortState
{
FT_Error err = FT_Err_Ok ;
lunasvg : : Matrix matrix ;
std : : unique_ptr < lunasvg : : Document > svg = nullptr ;
LunasvgPortState ( ) ;
~ LunasvgPortState ( ) ;
FT_Error err = FT_Err_Ok ;
lunasvg_matrix * matrix = nullptr ;
lunasvg_document * svg = nullptr ;
} ;
LunasvgPortState : : LunasvgPortState ( )
{
matrix = lunasvg_matrix_create ( ) ;
}
LunasvgPortState : : ~ LunasvgPortState ( )
{
lunasvg_matrix_destroy ( matrix ) ;
if ( svg )
lunasvg_document_destroy ( svg ) ;
}
static FT_Error ImGuiLunasvgPortInit ( FT_Pointer * _state )
{
* _state = IM_NEW ( LunasvgPortState ) ( ) ;
@ -860,9 +876,10 @@ static FT_Error ImGuiLunasvgPortRender(FT_GlyphSlot slot, FT_Pointer* _state)
return state - > err ;
// rows is height, pitch (or stride) equals to width * sizeof(int32)
lunasvg : : Bitmap bitmap ( ( uint8_t * ) slot - > bitmap . buffer , slot - > bitmap . width , slot - > bitmap . rows , slot - > bitmap . pitch ) ;
state - > svg - > setMatrix ( state - > svg - > matrix ( ) . identity ( ) ) ; // Reset the svg matrix to the default value
state - > svg - > render ( bitmap , state - > matrix ) ; // state->matrix is already scaled and translated
lunasvg_bitmap * bitmap = lunasvg_bitmap_create_with_data ( ( uint8_t * ) slot - > bitmap . buffer , slot - > bitmap . width , slot - > bitmap . rows , slot - > bitmap . pitch ) ;
lunasvg_document_set_identity_matrix ( state - > svg ) ; // Reset the svg matrix to the default value
lunasvg_document_render ( state - > svg , bitmap , state - > matrix ) ; // state->matrix is already scaled and translated
lunasvg_bitmap_destroy ( bitmap ) ;
state - > err = FT_Err_Ok ;
return state - > err ;
}
@ -878,47 +895,55 @@ static FT_Error ImGuiLunasvgPortPresetSlot(FT_GlyphSlot slot, FT_Bool cache, FT_
if ( cache )
return state - > err ;
state - > svg = lunasvg : : Document : : loadFromData ( ( const char * ) document - > svg_document , document - > svg_document_length ) ;
if ( state - > svg )
lunasvg_document_destroy ( state - > svg ) ;
state - > svg = lunasvg_document_load_from_data ( document - > svg_document , document - > svg_document_length ) ;
if ( state - > svg = = nullptr )
{
state - > err = FT_Err_Invalid_SVG_Document ;
return state - > err ;
}
lunasvg : : Box box = state - > svg - > box ( ) ;
double scale = std : : min ( metrics . x_ppem / box . w , metrics . y_ppem / box . h ) ;
lunasvg_box * box = lunasvg_box_create ( ) ;
double box_x , box_y , box_w , box_h ;
lunasvg_document_get_box ( state - > svg , box ) ;
lunasvg_box_get_values ( box , & box_x , & box_y , & box_w , & box_h ) ;
double scale = std : : min ( metrics . x_ppem / box_w , metrics . y_ppem / box_h ) ;
double xx = ( double ) document - > transform . xx / ( 1 < < 16 ) ;
double xy = - ( double ) document - > transform . xy / ( 1 < < 16 ) ;
double yx = - ( double ) document - > transform . yx / ( 1 < < 16 ) ;
double yy = ( double ) document - > transform . yy / ( 1 < < 16 ) ;
double x0 = ( double ) document - > delta . x / 64 * box . / metrics . x_ppem ;
double y0 = - ( double ) document - > delta . y / 64 * box . / metrics . y_ppem ;
double x0 = ( double ) document - > delta . x / 64 * box _ w / metrics . x_ppem ;
double y0 = - ( double ) document - > delta . y / 64 * box _ h / metrics . y_ppem ;
// Scale and transform, we don't translate the svg yet
- > matrix . identity ( ) ;
state- > matrix . scale ( scale , scale ) ;
state- > matrix . transform ( xx , xy , yx , yy , x0 , y0 ) ;
state- > svg - > setMatrix ( state - > matrix ) ;
lunasvg_matrix_identity( state- > matrix ) ;
lunasvg_matrix_scale( state - > matrix , scale , scale ) ;
lunasvg_matrix_transform( state - > matrix , xx , xy , yx , yy , x0 , y0 ) ;
lunasvg_document_set_matrix( state - > svg , state - > matrix ) ;
// Pre-translate the matrix for the rendering step
state- > matrix . translate ( - box . x , - box . y) ;
lunasvg_matrix_translate( state - > matrix , - box_x , - box_ y) ;
// Get the box again after the transformation
box = state - > svg - > box ( ) ;
lunasvg_document_get_box ( state - > svg , box ) ;
lunasvg_box_get_values ( box , & box_x , & box_y , & box_w , & box_h ) ;
lunasvg_box_destroy ( box ) ;
// Calculate the bitmap size
slot - > bitmap_left = FT_Int ( box . ) ;
slot - > bitmap_top = FT_Int ( - box . ) ;
slot - > bitmap . rows = ( unsigned int ) ( ImCeil ( ( float ) box . ) ) ;
slot - > bitmap . width = ( unsigned int ) ( ImCeil ( ( float ) box . ) ) ;
slot - > bitmap_left = FT_Int ( box _ x) ;
slot - > bitmap_top = FT_Int ( - box _ y) ;
slot - > bitmap . rows = ( unsigned int ) ( ImCeil ( ( float ) box _ h) ) ;
slot - > bitmap . width = ( unsigned int ) ( ImCeil ( ( float ) box _ w) ) ;
slot - > bitmap . pitch = slot - > bitmap . width * 4 ;
slot - > bitmap . pixel_mode = FT_PIXEL_MODE_BGRA ;
// Compute all the bearings and set them correctly. The outline is scaled already, we just need to use the bounding box.
double metrics_width = box . ;
double metrics_height = box . ;
double horiBearingX = box . ;
double horiBearingY = - box . ;
double metrics_width = box _ w;
double metrics_height = box _ h;
double horiBearingX = box _ x;
double horiBearingY = - box _ y;
double vertBearingX = slot - > metrics . horiBearingX / 64.0 - slot - > metrics . horiAdvance / 64.0 / 2.0 ;
double vertBearingY = ( slot - > metrics . vertAdvance / 64.0 - slot - > metrics . height / 64.0 ) / 2.0 ;
slot - > metrics . width = FT_Pos ( IM_ROUND ( metrics_width * 64.0 ) ) ; // Using IM_ROUND() assume width and height are positive
Stenzek
1 year ago