ref: 5ae831c10181954cd56e9b170da1133291383bc9
dir: /src/raster1/ftrend1.c/
#include <freetype/internal/ftobjs.h> #include <raster1.h> #include <ftraster.h> /* initialise renderer - init its raster */ static FT_Error ft_raster1_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 ); return 0; } /* sets render-specific mode */ static FT_Error ft_raster1_set_mode( FT_Renderer render, FT_ULong mode_tag, FT_Pointer data ) { /* we simply pass it to the raster */ return render->clazz->raster_class->raster_set_mode( render->raster, mode_tag, data ); } /* transform a given glyph image */ static FT_Error ft_raster1_transform( FT_Renderer render, FT_GlyphSlot slot, FT_Matrix* matrix, FT_Vector* delta ) { FT_Error error = FT_Err_Ok; if (slot->format != render->glyph_format) { error = FT_Err_Invalid_Argument; goto Exit; } if (matrix) FT_Outline_Transform( &slot->outline, matrix ); if (delta) FT_Outline_Translate( &slot->outline, delta->x, delta->y ); Exit: return error; } /* return the glyph's control box */ static void ft_raster1_get_cbox( FT_Renderer render, FT_GlyphSlot slot, FT_BBox *cbox ) { MEM_Set( cbox, 0, sizeof(*cbox) ); if (slot->format == render->glyph_format) FT_Outline_Get_CBox( &slot->outline, cbox ); } /* convert a slot's glyph image into a bitmap */ static FT_Error ft_raster1_render( FT_Renderer render, FT_GlyphSlot slot, FT_UInt mode, FT_Vector* origin ) { FT_Error error; FT_Outline* outline; FT_BBox cbox; FT_UInt width, height, pitch; FT_Bitmap* bitmap; FT_Memory memory; FT_Raster_Params params; /* check glyph image format */ if (slot->format != render->glyph_format) { error = FT_Err_Invalid_Argument; goto Exit; } /* check rendering mode */ if ( mode & ft_render_mode_antialias ) { /* raster1 is only capable of producing monochrome bitmaps */ if (render->clazz == &ft_raster1_renderer_class) return FT_Err_Cannot_Render_Glyph; } else { /* raster5 is only capable of producing 5-gray-levels bitmaps */ if (render->clazz == &ft_raster5_renderer_class) return FT_Err_Cannot_Render_Glyph; } outline = &slot->outline; /* translate the outline to the new origin if needed */ if (origin) FT_Outline_Translate( outline, origin->x, origin->y ); /* compute the control box, and grid fit it */ FT_Outline_Get_CBox( outline, &cbox ); cbox.xMin &= -64; cbox.yMin &= -64; cbox.xMax = (cbox.xMax+63) & -64; cbox.yMax = (cbox.yMax+63) & -64; width = (cbox.xMax - cbox.xMin) >> 6; height = (cbox.yMax - cbox.yMin) >> 6; bitmap = &slot->bitmap; memory = render->root.memory; /* release old bitmap buffer */ if ((slot->flags & ft_glyph_own_bitmap)) { FREE(bitmap->buffer); slot->flags &= ~ft_glyph_own_bitmap; } /* allocate new one, depends on pixel format */ if ( mode & ft_render_mode_antialias ) { /* we pad to 32 bits, only for backwards compatibility with FT 1.x */ pitch = (width+3) & -4; bitmap->pixel_mode = ft_pixel_mode_grays; bitmap->num_grays = 256; } else { pitch = (width+7) >> 3; bitmap->pixel_mode = ft_pixel_mode_mono; } bitmap->width = width; bitmap->rows = height; bitmap->pitch = pitch; if (ALLOC( bitmap->buffer, (FT_ULong)pitch * height )) goto Exit; slot->flags |= ft_glyph_own_bitmap; /* translate outline to render it into the bitmap */ FT_Outline_Translate( outline, -cbox.xMin, -cbox.yMin ); /* set up parameters */ params.target = bitmap; params.source = outline; params.flags = 0; if ( bitmap->pixel_mode == ft_pixel_mode_grays ) params.flags |= ft_raster_flag_aa; /* render outline into the bitmap */ error = render->raster_render( render->raster, ¶ms ); if (error) goto Exit; slot->format = ft_glyph_format_bitmap; slot->bitmap_left = cbox.xMin >> 6; slot->bitmap_top = cbox.yMax >> 6; Exit: return error; } const FT_Renderer_Class ft_raster1_renderer_class = { { ft_module_renderer, sizeof( FT_RendererRec ), "raster1", 0x10000, 0x20000, 0, /* module specific interface */ (FT_Module_Constructor) ft_raster1_init, (FT_Module_Destructor) 0, (FT_Module_Requester) 0 }, ft_glyph_format_outline, (FTRenderer_render) ft_raster1_render, (FTRenderer_transform) ft_raster1_transform, (FTRenderer_getCBox) ft_raster1_get_cbox, (FTRenderer_setMode) ft_raster1_set_mode, (FT_Raster_Funcs*) &ft_standard_raster }; /* this renderer is _NOT_ part of the default modules, you'll need */ /* to register it by hand in your application. It should only be */ /* used for backwards-compatibility with FT 1.x anyway.. */ const FT_Renderer_Class ft_raster5_renderer_class = { { ft_module_renderer, sizeof( FT_RendererRec ), "raster5", 0x10000, 0x20000, 0, /* module specific interface */ (FT_Module_Constructor) ft_raster1_init, (FT_Module_Destructor) 0, (FT_Module_Requester) 0 }, ft_glyph_format_outline, (FTRenderer_render) ft_raster1_render, (FTRenderer_transform) ft_raster1_transform, (FTRenderer_getCBox) ft_raster1_get_cbox, (FTRenderer_setMode) ft_raster1_set_mode, (FT_Raster_Funcs*) &ft_standard_raster };