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>
49 #define GET_SCALE(s, f) ((s) / (f)->units_per_EM)
54 #define LOG_MICROVG_FONT_START(fn) LOG_MICROVG_START(LOG_MICROVG_FONT_ID, CONCAT_DEFINES(LOG_MICROVG_FONT_, fn))
55 #define LOG_MICROVG_FONT_END(fn) LOG_MICROVG_END(LOG_MICROVG_FONT_ID, CONCAT_DEFINES(LOG_MICROVG_FONT_, fn))
76 extern int32_t SNIX_get_resource(jchar *path, SNIX_resource *resource);
86 static void _dispose_registered_font(
void *faceHandle);
99 static FT_Error __load_memory_font(FT_Face *face,
void *data,
int length);
111 static FT_Error __load_internal_font(FT_Face *face, jchar *font_name);
117 static void __register_font_description(
void *resource,
char *buffer, uint32_t bufferLength);
119 #if defined(VG_FEATURE_FONT_EXTERNAL)
131 static FT_Error __load_external_font(FT_Face *face, jchar *font_name);
145 static unsigned long __read_external_resource(FT_Stream stream,
unsigned long offset,
unsigned char *buffer,
146 unsigned long count);
155 static void __close_external_resource(FT_Stream stream);
164 FT_Renderer renderer;
166 #if defined VG_FEATURE_FONT && defined VG_FEATURE_FONT_FREETYPE_VECTOR && \
167 (VG_FEATURE_FONT == VG_FEATURE_FONT_FREETYPE_VECTOR)
168 const char *renderer_name =
"microvg";
170 #if defined VG_FEATURE_FONT && defined VG_FEATURE_FONT_FREETYPE_BITMAP && \
171 (VG_FEATURE_FONT == VG_FEATURE_FONT_FREETYPE_BITMAP)
172 const char *renderer_name =
"smooth";
180 void VG_FREETYPE_initialize(
void) {
181 FT_Error error = FT_Init_FreeType(&library);
182 if (FT_ERR(Ok) == error) {
183 renderer = FT_RENDERER(FT_Get_Module(library, renderer_name));
185 MEJ_LOG_INFO_MICROVG(
"Freetype renderer: %s\n", FT_MODULE_CLASS(renderer)->module_name);
187 MEJ_LOG_ERROR_MICROVG(
"No renderer found with name %s\n", renderer_name);
190 MEJ_LOG_ERROR_MICROVG(
"Internal freetype error initializing library, ID = %d\n", error);
199 jint LLVG_FONT_IMPL_load_font(jchar *font_name, jboolean complex_layout) {
200 LOG_MICROVG_FONT_START(load);
203 jint ret = LLVG_FONT_UNLOADED;
206 if (complex_layout && !LLVG_FONT_IMPL_has_complex_layouter()) {
207 ret = LLVG_FONT_UNLOADED;
210 FT_Error error = __load_internal_font(&face, font_name);
212 #if defined(VG_FEATURE_FONT_EXTERNAL)
213 if (FT_ERR(Cannot_Open_Resource) == error) {
215 error = __load_external_font(&face, font_name);
219 if (FT_ERR(Ok) == error) {
221 FT_Select_Charmap(face, ft_encoding_unicode);
222 MEJ_LOG_INFO_MICROVG(
"Freetype font loaded: %s\n", (
const char *)font_name);
224 SNI_registerResource((
void *)face, (SNI_closeFunction) & _dispose_registered_font,
225 &__register_font_description);
227 #if defined(VG_FEATURE_FONT_COMPLEX_LAYOUT)
228 if (JTRUE == complex_layout) {
234 }
else if (FT_ERR(Cannot_Open_Resource) != error) {
235 MEJ_LOG_ERROR_MICROVG(
"An error occurred during font loading: 0x%x, refer to fterrdef.h\n", error);
237 MEJ_LOG_ERROR_MICROVG(
"Resource not found: %s\n", (
const char *)font_name);
241 LOG_MICROVG_FONT_END(load);
246 jfloat LLVG_FONT_IMPL_string_width(jchar *text, jint faceHandle, jfloat size, jfloat letterSpacing) {
247 LOG_MICROVG_FONT_START(stringWidth);
250 if (LLVG_FONT_UNLOADED == faceHandle) {
251 ret = (jfloat)LLVG_RESOURCE_CLOSED;
253 FT_Face face = (FT_Face)faceHandle;
254 float scaled_width = 0.f;
257 float scale = GET_SCALE(size, face);
260 long unscaled_width = 0;
264 int previous_glyph_index = 0;
267 int previous_advance_x;
268 int previous_offset_x;
273 int length = (int)SNI_getArrayLength(text);
274 VG_HELPER_layout_configure(faceHandle, text, length);
276 while (VG_HELPER_layout_load_glyph(&glyph_index, &advance_x, &advance_y, &offset_x, &offset_y)) {
278 if (0 == previous_glyph_index) {
280 if (0 != face->glyph->metrics.width) {
281 unscaled_width -= face->glyph->metrics.horiBearingX;
283 unscaled_width -= face->glyph->advance.x;
287 unscaled_width += advance_x;
288 previous_glyph_index = glyph_index;
292 previous_advance_x = advance_x;
293 previous_offset_x = offset_x;
297 if (0 != face->glyph->metrics.width) {
298 unscaled_width -= previous_advance_x;
299 unscaled_width += face->glyph->metrics.horiBearingX;
300 unscaled_width += face->glyph->metrics.width;
301 unscaled_width += previous_offset_x;
303 if (0 != unscaled_width) {
304 unscaled_width -= previous_advance_x;
307 scaled_width = ((scale * (float)unscaled_width) + (((float)nb_chars - 1) * letterSpacing));
313 LOG_MICROVG_FONT_END(stringWidth);
318 jfloat LLVG_FONT_IMPL_string_height(jchar *text, jint faceHandle, jfloat size) {
319 LOG_MICROVG_FONT_START(stringHeight);
322 if (LLVG_FONT_UNLOADED == faceHandle) {
323 ret = (jfloat)LLVG_RESOURCE_CLOSED;
325 FT_Face face = (FT_Face)faceHandle;
326 float scaled_height = 0.f;
329 float scale = GET_SCALE(size, face);
331 FT_Pos horiBearingYTop = 0;
332 FT_Pos horiBearingYBottom = 0;
336 int previous_glyph_index = 0;
343 int length = (int)SNI_getArrayLength(text);
344 VG_HELPER_layout_configure(faceHandle, text, length);
346 while (VG_HELPER_layout_load_glyph(&glyph_index, &advance_x, &advance_y, &offset_x, &offset_y)) {
349 FT_Pos yBottom = face->glyph->metrics.horiBearingY - face->glyph->metrics.height;
350 horiBearingYBottom = (0 == previous_glyph_index) ? yBottom : MIN(yBottom, horiBearingYBottom);
351 horiBearingYTop = MAX(face->glyph->metrics.horiBearingY, horiBearingYTop);
353 previous_glyph_index = glyph_index;
356 scaled_height = scale * (float)(horiBearingYTop - horiBearingYBottom);
362 LOG_MICROVG_FONT_END(stringHeight);
367 jfloat LLVG_FONT_IMPL_get_baseline_position(jint faceHandle, jfloat size) {
368 LOG_MICROVG_FONT_START(baseline);
371 if (LLVG_FONT_UNLOADED == faceHandle) {
372 ret = (jfloat)LLVG_RESOURCE_CLOSED;
374 FT_Face face = (FT_Face)faceHandle;
375 float advance_y = 0.f;
378 float scale = GET_SCALE(size, face);
379 advance_y = (face->ascender * scale);
384 LOG_MICROVG_FONT_END(baseline);
389 jfloat LLVG_FONT_IMPL_get_height(jint faceHandle, jfloat size) {
390 LOG_MICROVG_FONT_START(height);
393 if (LLVG_FONT_UNLOADED == faceHandle) {
394 ret = (jfloat)LLVG_RESOURCE_CLOSED;
396 FT_Face face = (FT_Face)faceHandle;
397 float scale = GET_SCALE(size, face);
398 ret = face->height * scale;
401 LOG_MICROVG_FONT_END(height);
406 void LLVG_FONT_IMPL_dispose(jint faceHandle) {
407 _dispose_registered_font((
void *)faceHandle);
411 bool LLVG_FONT_IMPL_has_complex_layouter(
void) {
412 #ifdef VG_FEATURE_FONT_COMPLEX_LAYOUT
423 static void _dispose_registered_font(
void *faceHandle) {
424 FT_Face face = (FT_Face)faceHandle;
427 SNI_unregisterResource((
void *)face, (SNI_closeFunction) & _dispose_registered_font);
429 #if defined(VG_FEATURE_FONT_EXTERNAL)
432 FT_Stream stream = face->stream;
437 #if defined(VG_FEATURE_FONT_EXTERNAL)
440 if (&__close_external_resource == stream->close) {
441 ft_mem_free(library->memory, stream);
446 static FT_Error __load_memory_font(FT_Face *face,
void *data,
int length) {
447 return FT_New_Memory_Face(library, data, length, 0, face);
450 static FT_Error __load_internal_font(FT_Face *face, jchar *font_name) {
451 SNIX_resource font_resource;
454 if (0 == SNIX_get_resource(font_name, &font_resource)) {
455 error = __load_memory_font(face, font_resource.data, font_resource.size);
457 error = FT_ERR(Cannot_Open_Resource);
462 #if defined(VG_FEATURE_FONT_EXTERNAL)
464 static FT_Error __load_external_font(FT_Face *face, jchar *font_name) {
468 char const *ext_path = &(((
char const *)(font_name))[1]) ;
469 RES_ID resource_id = LLEXT_RES_open(ext_path);
471 if (0 <= resource_id) {
472 int32_t resource_size = LLEXT_RES_available(resource_id);
475 int32_t base_address = LLEXT_RES_getBaseAddress(resource_id);
477 if (-1 != base_address) {
480 error = __load_memory_font(face, (
void *)base_address, resource_size);
483 LLEXT_RES_close(resource_id);
488 args.flags = FT_OPEN_STREAM;
490 args.stream = (FT_StreamRec *)ft_mem_alloc(library->memory,
sizeof(FT_StreamRec), &error);
492 if (FT_ERR(Ok) == error) {
493 args.stream->base = NULL;
494 args.stream->size = resource_size;
495 args.stream->pos = 0;
496 args.stream->descriptor.value = resource_id;
498 args.stream->read = &__read_external_resource;
499 args.stream->close = &__close_external_resource;
501 error = FT_Open_Face(library, &args, 0, face);
503 error = FT_ERR(Out_Of_Memory);
507 error = FT_ERR(Cannot_Open_Resource);
513 static unsigned long __read_external_resource(FT_Stream stream,
unsigned long offset,
unsigned char *buffer,
514 unsigned long count) {
515 int32_t size = count;
516 RES_ID resource_id = (RES_ID)(stream->descriptor.value);
517 LLEXT_RES_seek(resource_id, offset);
518 LLEXT_RES_read(resource_id, buffer, &size);
522 static void __close_external_resource(FT_Stream stream) {
523 RES_ID resource_id = (RES_ID)(stream->descriptor.value);
524 LLEXT_RES_close(resource_id);
529 static void __register_font_description(
void *resource,
char *buffer, uint32_t bufferLength) {
531 const char descEF[] =
"Vector Font";
532 if (bufferLength >=
sizeof(descEF)) {
533 memcpy(buffer, descEF,
sizeof(descEF));
MicroEJ MicroVG library low level API: enable some features according to the hardware capacities.
MicroEJ MicroVG library low level API: implementation over FreeType.
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...