17 #if defined VG_FEATURE_FONT && \ 18 (defined VG_FEATURE_FONT_FREETYPE_VECTOR || defined VG_FEATURE_FONT_FREETYPE_BITMAP) && \ 19 (VG_FEATURE_FONT == VG_FEATURE_FONT_FREETYPE_VECTOR || VG_FEATURE_FONT == VG_FEATURE_FONT_FREETYPE_BITMAP) 29 #include <LLVG_impl.h> 30 #include <LLVG_FONT_impl.h> 32 #if defined (VG_FEATURE_FONT_EXTERNAL) 33 #include <LLEXT_RES_impl.h> 34 #include <freetype/internal/ftmemory.h> 48 #define GET_SCALE(s,f) ((s) / (f)->units_per_EM) 69 extern int32_t SNIX_get_resource(jchar* path, SNIX_resource* resource);
79 static void _dispose_registered_font(
void* faceHandle);
92 static FT_Error __load_memory_font(FT_Face* face,
void* data,
int length);
104 static FT_Error __load_internal_font(FT_Face* face, jchar* font_name);
107 #if defined (VG_FEATURE_FONT_EXTERNAL) 118 static FT_Error __load_external_font(FT_Face* face, jchar* font_name);
134 static unsigned long __read_external_resource(FT_Stream stream,
unsigned long offset,
unsigned char* buffer,
unsigned long count);
143 static void __close_external_resource(FT_Stream stream);
145 #endif // VG_FEATURE_FONT_EXTERNAL 152 FT_Renderer renderer;
154 #if defined VG_FEATURE_FONT && defined VG_FEATURE_FONT_FREETYPE_VECTOR && (VG_FEATURE_FONT == VG_FEATURE_FONT_FREETYPE_VECTOR) 155 const char* renderer_name =
"vglite_renderer";
157 #if defined VG_FEATURE_FONT && defined VG_FEATURE_FONT_FREETYPE_BITMAP && (VG_FEATURE_FONT == VG_FEATURE_FONT_FREETYPE_BITMAP) 158 const char* renderer_name =
"smooth";
166 void MICROVG_FONT_FREETYPE_initialize(
void) {
168 FT_Error error = FT_Init_FreeType(&library);
169 if(FT_ERR(Ok) == error) {
170 renderer = FT_RENDERER(FT_Get_Module(library, renderer_name));
172 MEJ_LOG_INFO_MICROVG(
"Freetype renderer: %s\n", FT_MODULE_CLASS(renderer)->module_name);
175 MEJ_LOG_ERROR_MICROVG(
"No renderer found with name %s\n", renderer_name);
179 MEJ_LOG_ERROR_MICROVG(
"Internal freetype error initializing library, ID = %d\n",error);
188 jint LLVG_FONT_IMPL_load_font(jchar* font_name, jboolean complex_layout) {
191 jint ret = LLVG_FONT_UNLOADED;
194 if(complex_layout && !LLVG_FONT_IMPL_has_complex_layouter()){
195 ret = LLVG_FONT_UNLOADED;
199 FT_Error error = __load_internal_font(&face, font_name);
201 #if defined (VG_FEATURE_FONT_EXTERNAL) 202 if (FT_ERR(Cannot_Open_Resource) == error) {
204 error = __load_external_font(&face, font_name);
206 #endif // VG_FEATURE_FONT_EXTERNAL 208 if (FT_ERR(Ok) == error) {
210 FT_Select_Charmap(face , ft_encoding_unicode);
211 MEJ_LOG_INFO_MICROVG(
"Freetype font loaded: %s\n", (
const char*)font_name);
213 SNI_registerResource((
void*)face, (SNI_closeFunction)&_dispose_registered_font, JNULL);
215 #if defined (VG_FEATURE_FONT_COMPLEX_LAYOUT) 216 if(JTRUE == complex_layout){
219 #endif // VG_FEATURE_FONT_COMPLEX_LAYOUT 223 else if (FT_ERR(Cannot_Open_Resource) != error){
224 MEJ_LOG_ERROR_MICROVG(
"An error occurred during font loading: 0x%x, refer to fterrdef.h\n", error);
227 MEJ_LOG_ERROR_MICROVG(
"Resource not found: %s\n", (
const char*)font_name);
235 jfloat LLVG_FONT_IMPL_string_width(jchar* text, jint faceHandle, jfloat size, jfloat letterSpacing) {
239 if (LLVG_FONT_UNLOADED == faceHandle) {
240 ret = (jfloat)LLVG_RESOURCE_CLOSED;
244 FT_Face face = (FT_Face) faceHandle;
245 float scaled_width = 0.f;
248 float scale = GET_SCALE(size, face);
251 long unscaled_width = 0;
255 int previous_glyph_index = 0;
258 int previous_advance_x;
263 int length = (int)SNI_getArrayLength(text);
264 MICROVG_HELPER_layout_configure(faceHandle, text, length);
266 while(0 != MICROVG_HELPER_layout_load_glyph(&glyph_index, &advance_x, &advance_y, &offset_x, &offset_y)) {
268 if (0 == previous_glyph_index){
270 if(0 != face->glyph->metrics.width) {
271 unscaled_width -= face->glyph->metrics.horiBearingX;
274 unscaled_width -= face->glyph->advance.x;
278 unscaled_width += advance_x;
279 previous_glyph_index = glyph_index;
282 previous_advance_x = advance_x;
286 if(0 != face->glyph->metrics.width) {
287 unscaled_width -= previous_advance_x;
288 unscaled_width += face->glyph->metrics.horiBearingX;
289 unscaled_width += face->glyph->metrics.width;
292 if(0 != unscaled_width){
293 unscaled_width -= previous_advance_x;
296 scaled_width = ((scale * (float) unscaled_width) + (((float) nb_chars - 1) * letterSpacing));
306 jfloat LLVG_FONT_IMPL_string_height(jchar* text, jint faceHandle, jfloat size) {
310 if (LLVG_FONT_UNLOADED == faceHandle) {
311 ret = (jfloat)LLVG_RESOURCE_CLOSED;
315 FT_Face face = (FT_Face) faceHandle;
316 float scaled_height = 0.f;
319 float scale = GET_SCALE(size, face);
321 FT_Pos horiBearingYTop = 0;
322 FT_Pos horiBearingYBottom = 0;
326 int previous_glyph_index = 0;
333 int length = (int)SNI_getArrayLength(text);
334 MICROVG_HELPER_layout_configure(faceHandle, text, length);
336 while(0 != MICROVG_HELPER_layout_load_glyph(&glyph_index, &advance_x, &advance_y, &offset_x, &offset_y)) {
339 FT_Pos yBottom = face->glyph->metrics.horiBearingY - face->glyph->metrics.height;
340 horiBearingYBottom = (0 == previous_glyph_index) ? yBottom : MEJ_MIN(yBottom, horiBearingYBottom);
341 horiBearingYTop = MEJ_MAX(face->glyph->metrics.horiBearingY, horiBearingYTop);
343 previous_glyph_index = glyph_index;
346 scaled_height = scale * (float) (horiBearingYTop - horiBearingYBottom);
356 jfloat LLVG_FONT_IMPL_get_baseline_position(jint faceHandle, jfloat size) {
360 if (LLVG_FONT_UNLOADED == faceHandle) {
361 ret = (jfloat)LLVG_RESOURCE_CLOSED;
365 FT_Face face = (FT_Face) faceHandle;
366 float advance_y = 0.f;
369 float scale = GET_SCALE(size, face);
370 advance_y = (face->ascender * scale);
379 jfloat LLVG_FONT_IMPL_get_height(jint faceHandle, jfloat size) {
383 if (LLVG_FONT_UNLOADED == faceHandle) {
384 ret = (jfloat)LLVG_RESOURCE_CLOSED;
387 FT_Face face = (FT_Face) faceHandle;
388 float scale = GET_SCALE(size, face);
389 ret = face->height * scale;
396 void LLVG_FONT_IMPL_dispose(jint faceHandle) {
397 _dispose_registered_font((
void*)faceHandle);
401 bool LLVG_FONT_IMPL_has_complex_layouter(
void){
402 #ifdef VG_FEATURE_FONT_COMPLEX_LAYOUT 413 static void _dispose_registered_font(
void* faceHandle) {
414 FT_Face face = (FT_Face) faceHandle;
416 #if defined (VG_FEATURE_FONT_EXTERNAL) 419 FT_Stream stream = face->stream;
420 #endif // VG_FEATURE_FONT_EXTERNAL 424 #if defined (VG_FEATURE_FONT_EXTERNAL) 427 if (&__close_external_resource == stream->close) {
428 ft_mem_free(library->memory, stream);
430 #endif // VG_FEATURE_FONT_EXTERNAL 433 static FT_Error __load_memory_font(FT_Face* face,
void* data,
int length) {
434 return FT_New_Memory_Face(library, data, length, 0, face);
437 static FT_Error __load_internal_font(FT_Face* face, jchar* font_name) {
438 SNIX_resource font_resource;
441 if (0 == SNIX_get_resource(font_name, &font_resource)) {
442 error = __load_memory_font(face, font_resource.data, font_resource.size);
445 error = FT_ERR(Cannot_Open_Resource);
450 #if defined (VG_FEATURE_FONT_EXTERNAL) 452 static FT_Error __load_external_font(FT_Face* face, jchar* font_name) {
457 char const* ext_path = &(((
char const*)(font_name))[1]) ;
458 RES_ID resource_id = LLEXT_RES_open(ext_path);
460 if (0 <= resource_id) {
462 int32_t resource_size = LLEXT_RES_available(resource_id);
465 int32_t base_address = LLEXT_RES_getBaseAddress(resource_id);
467 if (-1 != base_address) {
471 error = __load_memory_font(face, (
void*)base_address, resource_size);
474 LLEXT_RES_close(resource_id);
480 args.flags = FT_OPEN_STREAM;
482 args.stream = (FT_StreamRec*)ft_mem_alloc(library->memory,
sizeof(FT_StreamRec), &error);
484 if (FT_ERR(Ok) == error) {
486 args.stream->base = NULL;
487 args.stream->size = resource_size;
488 args.stream->pos = 0;
489 args.stream->descriptor.value = resource_id;
491 args.stream->read = &__read_external_resource;
492 args.stream->close = &__close_external_resource;
494 error = FT_Open_Face(library, &args, 0, face);
497 error = FT_ERR(Out_Of_Memory);
502 error = FT_ERR(Cannot_Open_Resource);
508 static unsigned long __read_external_resource(FT_Stream stream,
unsigned long offset,
unsigned char* buffer,
unsigned long count) {
509 int32_t size = count;
510 RES_ID resource_id = (RES_ID)(stream->descriptor.value);
511 LLEXT_RES_seek(resource_id, offset);
512 LLEXT_RES_read(resource_id, buffer, &size);
516 static void __close_external_resource(FT_Stream stream) {
517 RES_ID resource_id = (RES_ID)(stream->descriptor.value);
518 LLEXT_RES_close(resource_id);
521 #endif // VG_FEATURE_FONT_EXTERNAL 523 #endif // defined VG_FEATURE_FONT && \ 524 // (defined VG_FEATURE_FONT_FREETYPE_VECTOR || defined VG_FEATURE_FONT_FREETYPE_BITMAP) && \ 525 // (VG_FEATURE_FONT == VG_FEATURE_FONT_FREETYPE_VECTOR || VG_FEATURE_FONT == VG_FEATURE_FONT_FREETYPE_BITMAP) MicroEJ MicroVG library low level API: helper to implement library natives methods.
#define FT_FACE_FLAG_COMPLEX_LAYOUT
Freetype supplementary flag for complex layout Uses a free bit in freetype face flags to convey the c...
MicroEJ MicroVG library low level API: implementation over FreeType.
MicroEJ MicroVG library low level API: enable some features according to the hardware capacities...