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Diffstat (limited to 'indra/llrender/llfontfreetype.cpp')
-rw-r--r--indra/llrender/llfontfreetype.cpp408
1 files changed, 272 insertions, 136 deletions
diff --git a/indra/llrender/llfontfreetype.cpp b/indra/llrender/llfontfreetype.cpp
index 6128e03fa7..91898e6de1 100644
--- a/indra/llrender/llfontfreetype.cpp
+++ b/indra/llrender/llfontfreetype.cpp
@@ -32,13 +32,14 @@
// Freetype stuff
#include <ft2build.h>
#ifdef LL_WINDOWS
-#include <freetype2\freetype\ftsystem.h>
+#include <freetype/ftsystem.h>
#endif
#include "llfontfreetypesvg.h"
// For some reason, this won't work if it's not wrapped in the ifdef
#ifdef FT_FREETYPE_H
#include FT_FREETYPE_H
+#include FT_MULTIPLE_MASTERS_H
#endif
#include "lldir.h"
@@ -52,13 +53,15 @@
#include "llfontbitmapcache.h"
#include "llgl.h"
-#define ENABLE_OT_SVG_SUPPORT
+#if !defined(LL_NO_OTSVG)
+ #define ENABLE_OT_SVG_SUPPORT
+#endif
FT_Render_Mode gFontRenderMode = FT_RENDER_MODE_NORMAL;
-LLFontManager *gFontManagerp = NULL;
+LLFontManager *gFontManagerp = nullptr;
-FT_Library gFTLibrary = NULL;
+FT_Library gFTLibrary = nullptr;
//static
void LLFontManager::initClass()
@@ -73,7 +76,7 @@ void LLFontManager::initClass()
void LLFontManager::cleanupClass()
{
delete gFontManagerp;
- gFontManagerp = NULL;
+ gFontManagerp = nullptr;
}
LLFontManager::LLFontManager()
@@ -87,7 +90,7 @@ LLFontManager::LLFontManager()
FT_Done_FreeType(gFTLibrary);
}
-#ifdef ENABLE_OT_SVG_SUPPORT
+#if defined(ENABLE_OT_SVG_SUPPORT)
SVG_RendererHooks hooks = {
LLFontFreeTypeSvgRenderer::OnInit,
LLFontFreeTypeSvgRenderer::OnFree,
@@ -101,6 +104,7 @@ LLFontManager::LLFontManager()
LLFontManager::~LLFontManager()
{
FT_Done_FreeType(gFTLibrary);
+ unloadAllFonts();
}
@@ -115,6 +119,8 @@ LLFontGlyphInfo::LLFontGlyphInfo(U32 index, EFontGlyphType glyph_type)
mYBitmapOffset(0), // Offset to the origin in the bitmap
mXBearing(0), // Distance from baseline to left in pixels
mYBearing(0), // Distance from baseline to top in pixels
+ mLsbDelta(0),
+ mRsbDelta(0),
mBitmapEntry(std::make_pair(EFontGlyphType::Unspecified, -1)) // Which bitmap in the bitmap cache contains this glyph
{
}
@@ -130,6 +136,8 @@ LLFontGlyphInfo::LLFontGlyphInfo(const LLFontGlyphInfo& fgi)
, mYBitmapOffset(fgi.mYBitmapOffset)
, mXBearing(fgi.mXBearing)
, mYBearing(fgi.mYBearing)
+ , mLsbDelta(fgi.mLsbDelta)
+ , mRsbDelta(fgi.mRsbDelta)
{
mBitmapEntry = fgi.mBitmapEntry;
}
@@ -139,14 +147,10 @@ LLFontFreetype::LLFontFreetype()
mAscender(0.f),
mDescender(0.f),
mLineHeight(0.f),
-#ifdef LL_WINDOWS
- pFileStream(NULL),
- pFtStream(NULL),
-#endif
mIsFallback(false),
- mFTFace(NULL),
+ mHinting(EFontHinting::FORCE_AUTOHINT),
+ mFTFace(nullptr),
mRenderGlyphCount(0),
- mAddGlyphCount(0),
mStyle(0),
mPointSize(0)
{
@@ -158,64 +162,54 @@ LLFontFreetype::~LLFontFreetype()
// Clean up freetype libs.
if (mFTFace)
FT_Done_Face(mFTFace);
- mFTFace = NULL;
+ mFTFace = nullptr;
// Delete glyph info
std::for_each(mCharGlyphInfoMap.begin(), mCharGlyphInfoMap.end(), DeletePairedPointer());
mCharGlyphInfoMap.clear();
-#ifdef LL_WINDOWS
- delete pFileStream; // closed by FT_Done_Face
- delete pFtStream;
-#endif
delete mFontBitmapCachep;
// mFallbackFonts cleaned up by LLPointer destructor
}
-#ifdef LL_WINDOWS
-unsigned long ft_read_cb(FT_Stream stream, unsigned long offset, unsigned char *buffer, unsigned long count) {
- if (count <= 0) return count;
- llifstream *file_stream = static_cast<llifstream *>(stream->descriptor.pointer);
- file_stream->seekg(offset, std::ios::beg);
- file_stream->read((char*)buffer, count);
- return (unsigned long)file_stream->gcount();
-}
-
-void ft_close_cb(FT_Stream stream) {
- llifstream *file_stream = static_cast<llifstream *>(stream->descriptor.pointer);
- file_stream->close();
-}
-#endif
-
-bool LLFontFreetype::loadFace(const std::string& filename, F32 point_size, F32 vert_dpi, F32 horz_dpi, bool is_fallback, S32 face_n)
+bool LLFontFreetype::loadFace(const std::string& filename, F32 point_size, F32 vert_dpi, F32 horz_dpi, S32 weight, bool is_fallback, S32 face_n, EFontHinting hinting, S32 flags)
{
// Don't leak face objects. This is also needed to deal with
// changed font file names.
if (mFTFace)
{
FT_Done_Face(mFTFace);
- mFTFace = NULL;
+ mFTFace = nullptr;
}
- int error;
-#ifdef LL_WINDOWS
- error = ftOpenFace(filename, face_n);
-#else
- error = FT_New_Face( gFTLibrary,
- filename.c_str(),
- 0,
- &mFTFace);
-#endif
+ FT_Open_Args openArgs;
+ memset( &openArgs, 0, sizeof( openArgs ) );
+ openArgs.memory_base = gFontManagerp->loadFont( filename, openArgs.memory_size );
+
+ if( !openArgs.memory_base )
+ return false;
+
+ openArgs.flags = FT_OPEN_MEMORY;
+ int error = FT_Open_Face( gFTLibrary, &openArgs, 0, &mFTFace );
if (error)
- {
-#ifdef LL_WINDOWS
- clearFontStreams();
-#endif
return false;
- }
mIsFallback = is_fallback;
+ mHinting = hinting;
+ mFontFlags = flags;
+ mWeight = weight;
+
+ bool variable_font = false;
+ if (weight >= 0)
+ {
+ variable_font = setVariationAxis("wght", static_cast<F32>(weight));
+
+ // For Inter, also set optical size based on point size
+ // This makes text look better at different sizes
+ setVariationAxis("opsz", point_size);
+ }
+
F32 pixels_per_em = (point_size / 72.f)*vert_dpi; // Size in inches * dpi
error = FT_Set_Char_Size(mFTFace, /* handle to face object */
@@ -228,10 +222,8 @@ bool LLFontFreetype::loadFace(const std::string& filename, F32 point_size, F32 v
{
// Clean up freetype libs.
FT_Done_Face(mFTFace);
-#ifdef LL_WINDOWS
- clearFontStreams();
-#endif
- mFTFace = NULL;
+
+ mFTFace = nullptr;
return false;
}
@@ -273,6 +265,18 @@ bool LLFontFreetype::loadFace(const std::string& filename, F32 point_size, F32 v
{
mStyle |= LLFontGL::BOLD;
}
+ else if (flags & LLFontGL::BOLD)
+ {
+ // FontGL applies programmatic bolding to fonts that are a part of 'bold' descriptor but don't have the bold style set.
+ // Ex: Inter SemiBold doesn't have FT_STYLE_FLAG_BOLD and without this style it would be bolded programmatically.
+ mStyle |= LLFontGL::BOLD;
+ }
+ else if (weight >= 600 && variable_font)
+ {
+ // If the font is heavy enough, consider it bold and avoid programmatic bolding
+ // even if it doesn't have the bold style set.
+ mStyle |= LLFontGL::BOLD;
+ }
if(mFTFace->style_flags & FT_STYLE_FLAG_ITALIC)
{
@@ -287,73 +291,30 @@ S32 LLFontFreetype::getNumFaces(const std::string& filename)
if (mFTFace)
{
FT_Done_Face(mFTFace);
- mFTFace = NULL;
+ mFTFace = nullptr;
}
S32 num_faces = 1;
-#ifdef LL_WINDOWS
- int error = ftOpenFace(filename, 0);
+ FT_Open_Args openArgs;
+ memset( &openArgs, 0, sizeof( openArgs ) );
+ openArgs.memory_base = gFontManagerp->loadFont( filename, openArgs.memory_size );
+ if( !openArgs.memory_base )
+ return 0;
+ openArgs.flags = FT_OPEN_MEMORY;
+ int error = FT_Open_Face( gFTLibrary, &openArgs, 0, &mFTFace );
if (error)
- {
return 0;
- }
else
- {
num_faces = mFTFace->num_faces;
- }
FT_Done_Face(mFTFace);
- clearFontStreams();
- mFTFace = NULL;
-#endif
+ mFTFace = nullptr;
return num_faces;
}
-#ifdef LL_WINDOWS
-S32 LLFontFreetype::ftOpenFace(const std::string& filename, S32 face_n)
-{
- S32 error = -1;
- pFileStream = new llifstream(filename, std::ios::binary);
- if (pFileStream->is_open())
- {
- std::streampos beg = pFileStream->tellg();
- pFileStream->seekg(0, std::ios::end);
- std::streampos end = pFileStream->tellg();
- std::size_t file_size = end - beg;
- pFileStream->seekg(0, std::ios::beg);
-
- pFtStream = new LLFT_Stream();
- pFtStream->base = 0;
- pFtStream->pos = 0;
- pFtStream->size = static_cast<unsigned long>(file_size);
- pFtStream->descriptor.pointer = pFileStream;
- pFtStream->read = ft_read_cb;
- pFtStream->close = ft_close_cb;
-
- FT_Open_Args args;
- args.flags = FT_OPEN_STREAM;
- args.stream = (FT_StreamRec*)pFtStream;
- error = FT_Open_Face(gFTLibrary, &args, face_n, &mFTFace);
- }
- return error;
-}
-
-void LLFontFreetype::clearFontStreams()
-{
- if (pFileStream)
- {
- pFileStream->close();
- }
- delete pFileStream;
- delete pFtStream;
- pFileStream = NULL;
- pFtStream = NULL;
-}
-#endif
-
void LLFontFreetype::addFallbackFont(const LLPointer<LLFontFreetype>& fallback_font,
const char_functor_t& functor)
{
@@ -377,7 +338,7 @@ F32 LLFontFreetype::getDescenderHeight() const
F32 LLFontFreetype::getXAdvance(llwchar wch) const
{
- if (mFTFace == NULL)
+ if (mFTFace == nullptr)
return 0.0;
// Return existing info only if it is current
@@ -401,7 +362,7 @@ F32 LLFontFreetype::getXAdvance(llwchar wch) const
F32 LLFontFreetype::getXAdvance(const LLFontGlyphInfo* glyph) const
{
- if (mFTFace == NULL)
+ if (mFTFace == nullptr)
return 0.0;
return glyph->mXAdvance;
@@ -409,26 +370,20 @@ F32 LLFontFreetype::getXAdvance(const LLFontGlyphInfo* glyph) const
F32 LLFontFreetype::getXKerning(llwchar char_left, llwchar char_right) const
{
- if (mFTFace == NULL)
+ if (mFTFace == nullptr)
return 0.0;
//llassert(!mIsFallback);
LLFontGlyphInfo* left_glyph_info = getGlyphInfo(char_left, EFontGlyphType::Unspecified);;
- U32 left_glyph = left_glyph_info ? left_glyph_info->mGlyphIndex : 0;
// Kern this puppy.
LLFontGlyphInfo* right_glyph_info = getGlyphInfo(char_right, EFontGlyphType::Unspecified);
- U32 right_glyph = right_glyph_info ? right_glyph_info->mGlyphIndex : 0;
-
- FT_Vector delta;
- llverify(!FT_Get_Kerning(mFTFace, left_glyph, right_glyph, ft_kerning_unfitted, &delta));
-
- return delta.x*(1.f/64.f);
+ return getXKerning(left_glyph_info, right_glyph_info);
}
F32 LLFontFreetype::getXKerning(const LLFontGlyphInfo* left_glyph_info, const LLFontGlyphInfo* right_glyph_info) const
{
- if (mFTFace == NULL)
+ if (mFTFace == nullptr)
return 0.0;
U32 left_glyph = left_glyph_info ? left_glyph_info->mGlyphIndex : 0;
@@ -436,9 +391,28 @@ F32 LLFontFreetype::getXKerning(const LLFontGlyphInfo* left_glyph_info, const LL
FT_Vector delta;
- llverify(!FT_Get_Kerning(mFTFace, left_glyph, right_glyph, ft_kerning_unfitted, &delta));
+ llverify(!FT_Get_Kerning(mFTFace, left_glyph, right_glyph, FT_KERNING_UNFITTED, &delta));
+
+ // Apply the FreeType auto-hinter's subpixel side-bearing correction between
+ // adjacent glyphs. When the hinter has shifted the right side of the left
+ // glyph or the left side of the right glyph, (rsb_delta - lsb_delta) is the
+ // sub-pixel nudge that keeps spacing visually even.
+ F32 delta_correction = 0.0f;
+ if (left_glyph_info && right_glyph_info)
+ {
+ // According to FreeType docs, these delta values should only trigger
+ // discrete ±1 pixel adjustments when they cross certain thresholds.
+ // Substructing delta_diff from delta.x doesn't work as well as treating
+ // it as a thresholds
+ S32 delta_diff = left_glyph_info->mRsbDelta - right_glyph_info->mLsbDelta;
+ if (delta_diff > 32)
+ delta_correction = -1.0f;
+ else if (delta_diff < -31)
+ delta_correction = 1.0f;
+ }
- return delta.x*(1.f/64.f);
+ // ft_kerning_unfitted mode always returns 26.6 fixed-point values
+ return (F32)(delta.x * (1.f / 64.f)) + delta_correction;
}
bool LLFontFreetype::hasGlyph(llwchar wch) const
@@ -451,7 +425,7 @@ LLFontGlyphInfo* LLFontFreetype::addGlyph(llwchar wch, EFontGlyphType glyph_type
{
if (!mFTFace)
{
- return NULL;
+ return nullptr;
}
llassert(!mIsFallback);
@@ -483,8 +457,8 @@ LLFontGlyphInfo* LLFontFreetype::addGlyph(llwchar wch, EFontGlyphType glyph_type
continue;
}
glyph_index = FT_Get_Char_Index(pair.first->mFTFace, wch);
- if (glyph_index)
- {
+ if (glyph_index)
+ {
return addGlyphFromFont(pair.first, wch, glyph_index,
glyph_type);
}
@@ -542,17 +516,17 @@ LLFontGlyphInfo* LLFontFreetype::addGlyph(llwchar wch, EFontGlyphType glyph_type
{
return addGlyphFromFont(this, wch, glyph_index, glyph_type);
}
- return NULL;
+ return nullptr;
}
LLFontGlyphInfo* LLFontFreetype::addGlyphFromFont(const LLFontFreetype *fontp, llwchar wch, U32 glyph_index, EFontGlyphType requested_glyph_type) const
{
LL_PROFILE_ZONE_SCOPED;
- if (mFTFace == NULL)
- return NULL;
+ if (mFTFace == nullptr)
+ return nullptr;
llassert(!mIsFallback);
- fontp->renderGlyph(requested_glyph_type, glyph_index);
+ fontp->renderGlyph(requested_glyph_type, glyph_index, wch);
EFontGlyphType bitmap_glyph_type = EFontGlyphType::Unspecified;
switch (fontp->mFTFace->glyph->bitmap.pixel_mode)
@@ -574,7 +548,6 @@ LLFontGlyphInfo* LLFontFreetype::addGlyphFromFont(const LLFontFreetype *fontp, l
S32 pos_x, pos_y;
U32 bitmap_num;
mFontBitmapCachep->nextOpenPos(width, pos_x, pos_y, bitmap_glyph_type, bitmap_num);
- mAddGlyphCount++;
LLFontGlyphInfo* gi = new LLFontGlyphInfo(glyph_index, requested_glyph_type);
gi->mXBitmapOffset = pos_x;
@@ -584,6 +557,11 @@ LLFontGlyphInfo* LLFontFreetype::addGlyphFromFont(const LLFontFreetype *fontp, l
gi->mHeight = height;
gi->mXBearing = fontp->mFTFace->glyph->bitmap_left;
gi->mYBearing = fontp->mFTFace->glyph->bitmap_top;
+ // FreeType fills these when the glyph has been auto-hinted; they describe how
+ // much the hinter nudged the left/right side bearings (in 26.6 pixels). Keep
+ // them so inter-glyph spacing can be corrected in getXKerning().
+ gi->mLsbDelta = (S32)fontp->mFTFace->glyph->lsb_delta;
+ gi->mRsbDelta = (S32)fontp->mFTFace->glyph->rsb_delta;
// Convert these from 26.6 units to float pixels.
gi->mXAdvance = fontp->mFTFace->glyph->advance.x / 64.f;
gi->mYAdvance = fontp->mFTFace->glyph->advance.y / 64.f;
@@ -602,7 +580,7 @@ LLFontGlyphInfo* LLFontFreetype::addGlyphFromFont(const LLFontFreetype *fontp, l
{
U8 *buffer_data = fontp->mFTFace->glyph->bitmap.buffer;
S32 buffer_row_stride = fontp->mFTFace->glyph->bitmap.pitch;
- U8 *tmp_graydata = NULL;
+ U8 *tmp_graydata = nullptr;
if (fontp->mFTFace->glyph->bitmap.pixel_mode
== FT_PIXEL_MODE_MONO)
@@ -656,7 +634,14 @@ LLFontGlyphInfo* LLFontFreetype::addGlyphFromFont(const LLFontFreetype *fontp, l
LLImageGL *image_gl = mFontBitmapCachep->getImageGL(bitmap_glyph_type, bitmap_num);
LLImageRaw *image_raw = mFontBitmapCachep->getImageRaw(bitmap_glyph_type, bitmap_num);
- image_gl->setSubImage(image_raw, 0, 0, image_gl->getWidth(), image_gl->getHeight());
+ if (image_gl && image_raw)
+ {
+ image_gl->setSubImage(image_raw, 0, 0, image_gl->getWidth(), image_gl->getHeight());
+ }
+ else
+ {
+ llassert(false); //images were just inserted by nextOpenPos, they shouldn't be missing
+ }
return gi;
}
@@ -697,12 +682,12 @@ void LLFontFreetype::insertGlyphInfo(llwchar wch, LLFontGlyphInfo* gi) const
}
}
-void LLFontFreetype::renderGlyph(EFontGlyphType bitmap_type, U32 glyph_index) const
+void LLFontFreetype::renderGlyph(EFontGlyphType bitmap_type, U32 glyph_index, llwchar wch) const
{
- if (mFTFace == NULL)
+ if (mFTFace == nullptr)
return;
- FT_Int32 load_flags = FT_LOAD_FORCE_AUTOHINT;
+ FT_Int32 load_flags = (FT_Int32)mHinting;
if (EFontGlyphType::Color == bitmap_type)
{
// We may not actually get a color render so our caller should always examine mFTFace->glyph->bitmap.pixel_mode
@@ -712,11 +697,28 @@ void LLFontFreetype::renderGlyph(EFontGlyphType bitmap_type, U32 glyph_index) co
FT_Error error = FT_Load_Glyph(mFTFace, glyph_index, load_flags);
if (FT_Err_Ok != error)
{
+ if (error == FT_Err_Out_Of_Memory)
+ {
+ LLError::LLUserWarningMsg::showOutOfMemory();
+ LL_ERRS() << "Out of memory loading glyph for character " << llformat("U+%xu", U32(wch)) << LL_ENDL;
+ }
+
std::string message = llformat(
- "Error %d (%s) loading glyph %u: bitmap_type=%u, load_flags=%d",
- error, FT_Error_String(error), glyph_index, bitmap_type, load_flags);
+ "Error %d (%s) loading wchar %u glyph %u/%u: bitmap_type=%u, load_flags=%d",
+ error, FT_Error_String(error), wch, glyph_index, mFTFace->num_glyphs, bitmap_type, load_flags);
LL_WARNS_ONCE() << message << LL_ENDL;
error = FT_Load_Glyph(mFTFace, glyph_index, load_flags ^ FT_LOAD_COLOR);
+ if (FT_Err_Invalid_Outline == error
+ || FT_Err_Invalid_Composite == error
+ || (FT_Err_Ok != error && LLStringOps::isEmoji(wch)))
+ {
+ // value~0 always corresponds to the 'missing glyph'
+ error = FT_Load_Glyph(mFTFace, 0, FT_LOAD_FORCE_AUTOHINT);
+ if (FT_Err_Ok != error)
+ {
+ LL_ERRS() << "Loading fallback for char '" << (U32)wch << "', glyph " << glyph_index << " failed with error : " << (S32)error << LL_ENDL;
+ }
+ }
llassert_always_msg(FT_Err_Ok == error, message.c_str());
}
@@ -728,7 +730,7 @@ void LLFontFreetype::renderGlyph(EFontGlyphType bitmap_type, U32 glyph_index) co
void LLFontFreetype::reset(F32 vert_dpi, F32 horz_dpi)
{
resetBitmapCache();
- loadFace(mName, mPointSize, vert_dpi ,horz_dpi, mIsFallback, 0);
+ loadFace(mName, mPointSize, vert_dpi ,horz_dpi, mWeight, mIsFallback, 0, mHinting, mFontFlags);
if (!mIsFallback)
{
// This is the head of the list - need to rebuild ourself and all fallbacks.
@@ -823,7 +825,12 @@ bool LLFontFreetype::setSubImageBGRA(U32 x, U32 y, U32 bitmap_num, U16 width, U1
{
LLImageRaw* image_raw = mFontBitmapCachep->getImageRaw(EFontGlyphType::Color, bitmap_num);
llassert(!mIsFallback);
- llassert(image_raw && (image_raw->getComponents() == 4));
+ if (!image_raw)
+ {
+ llassert(false);
+ return false;
+ }
+ llassert(image_raw->getComponents() == 4);
// NOTE: inspired by LLImageRaw::setSubImage()
U32* image_data = (U32*)image_raw->getData();
@@ -851,10 +858,17 @@ bool LLFontFreetype::setSubImageBGRA(U32 x, U32 y, U32 bitmap_num, U16 width, U1
void LLFontFreetype::setSubImageLuminanceAlpha(U32 x, U32 y, U32 bitmap_num, U32 width, U32 height, U8 *data, S32 stride) const
{
LLImageRaw *image_raw = mFontBitmapCachep->getImageRaw(EFontGlyphType::Grayscale, bitmap_num);
- LLImageDataLock lock(image_raw);
llassert(!mIsFallback);
- llassert(image_raw && (image_raw->getComponents() == 2));
+ if (!image_raw)
+ {
+ llassert(false);
+ return;
+ }
+
+ LLImageDataLock lock(image_raw);
+
+ llassert(image_raw->getComponents() == 2);
U8 *target = image_raw->getData();
llassert(target);
@@ -884,3 +898,125 @@ void LLFontFreetype::setSubImageLuminanceAlpha(U32 x, U32 y, U32 bitmap_num, U32
}
}
+bool LLFontFreetype::setVariationAxis(const std::string& axis_tag, F32 value)
+{
+ if (!mFTFace)
+ return false;
+
+ // Check if this is a variable font
+ FT_MM_Var* master = nullptr;
+ if (FT_Get_MM_Var(mFTFace, &master) != 0)
+ {
+ // Not a variable font - this is not an error, just silently skip
+ return false;
+ }
+
+ // Find the axis by tag (e.g., "wght" for weight)
+ FT_UInt axis_index = 0;
+ bool found = false;
+ for (FT_UInt i = 0; i < master->num_axis; i++)
+ {
+ // Compare the 4-byte tag
+ if (master->axis[i].tag == FT_MAKE_TAG(axis_tag[0], axis_tag[1], axis_tag[2], axis_tag[3]))
+ {
+ axis_index = i;
+ found = true;
+
+ // Clamp value to valid range for this axis
+ F32 min_val = master->axis[i].minimum / 65536.0f;
+ F32 max_val = master->axis[i].maximum / 65536.0f;
+ value = llclamp(value, min_val, max_val);
+
+ break;
+ }
+ }
+
+ if (!found)
+ {
+ FT_Done_MM_Var(gFTLibrary, master);
+ LL_WARNS_ONCE("Font") << "Axis '" << axis_tag << "' not found in font: " << mName << LL_ENDL;
+ return false;
+ }
+
+ FT_UInt num_coords = master->num_axis;
+ FT_Fixed* coords = new FT_Fixed[num_coords];
+
+ // Get current coordinates
+ FT_Get_Var_Design_Coordinates(mFTFace, num_coords, coords);
+
+ // Update the specific axis
+ coords[axis_index] = (FT_Fixed)(value * 65536.0f);
+
+ // Set all coordinates
+ int error = FT_Set_Var_Design_Coordinates(mFTFace, num_coords, coords);
+
+ delete[] coords;
+ FT_Done_MM_Var(gFTLibrary, master);
+
+ if (error != 0)
+ {
+ LL_WARNS() << "Failed to set variation coordinates for " << axis_tag
+ << " = " << value << " in font: " << mName << LL_ENDL;
+ return false;
+ }
+
+ LL_DEBUGS("Font") << "Set " << axis_tag << " = " << value
+ << " for font: " << mName << LL_ENDL;
+ return true;
+}
+
+
+namespace ll
+{
+ namespace fonts
+ {
+ class LoadedFont
+ {
+ public:
+ LoadedFont( std::string aName , std::string const &aAddress, std::size_t aSize )
+ : mAddress( aAddress )
+ {
+ mName = aName;
+ mSize = aSize;
+ mRefs = 1;
+ }
+ std::string mName;
+ std::string mAddress;
+ std::size_t mSize;
+ U32 mRefs;
+ };
+ }
+}
+
+U8 const* LLFontManager::loadFont( std::string const &aFilename, long &a_Size)
+{
+ a_Size = 0;
+ std::map< std::string, std::shared_ptr<ll::fonts::LoadedFont> >::iterator itr = m_LoadedFonts.find( aFilename );
+ if( itr != m_LoadedFonts.end() )
+ {
+ ++itr->second->mRefs;
+ // A possible overflow cannot happen here, as it is asserted that the size is less than std::numeric_limits<long>::max() a few lines below.
+ a_Size = static_cast<long>(itr->second->mSize);
+ return reinterpret_cast<U8 const*>(itr->second->mAddress.c_str());
+ }
+
+ auto strContent = LLFile::getContents(aFilename);
+
+ if( strContent.empty() )
+ return nullptr;
+
+ // For fontconfig a type of long is required, std::string::size() returns size_t. I think it is safe to limit this to 2GiB and not support fonts that huge (can that even be a thing?)
+ llassert_always( strContent.size() < std::numeric_limits<long>::max() );
+
+ a_Size = static_cast<long>(strContent.size());
+
+ auto pCache = std::make_shared<ll::fonts::LoadedFont>( aFilename, strContent, a_Size );
+ itr = m_LoadedFonts.insert( std::make_pair( aFilename, pCache ) ).first;
+
+ return reinterpret_cast<U8 const*>(itr->second->mAddress.c_str());
+}
+
+void LLFontManager::unloadAllFonts()
+{
+ m_LoadedFonts.clear();
+}
generated by cgit v1.3 (git 2.53.0) at 2026-07-21 21:38:53 +0000