Glyph Font::loadGlyph(Uint32 codePoint, unsigned int characterSize, bool bold, float outlineThickness) const
{
// The glyph to return
Glyph glyph;
// First, transform our ugly void* to a FT_Face
FT_Face face = static_cast<FT_Face>(m_face);
if (!face)
return glyph;
// Set the character size
if (!setCurrentSize(characterSize))
return glyph;
// Load the glyph corresponding to the code point
FT_Int32 flags = FT_LOAD_TARGET_NORMAL | FT_LOAD_FORCE_AUTOHINT;
if (outlineThickness != 0)
flags |= FT_LOAD_NO_BITMAP;
if (FT_Load_Char(face, codePoint, flags) != 0)
return glyph;
// Retrieve the glyph
FT_Glyph glyphDesc;
if (FT_Get_Glyph(face->glyph, &glyphDesc) != 0)
return glyph;
// Apply bold and outline (there is no fallback for outline) if necessary -- first technique using outline (highest quality)
FT_Pos weight = 1 << 6;
bool outline = (glyphDesc->format == FT_GLYPH_FORMAT_OUTLINE);
if (outline)
{
if (bold)
{
FT_OutlineGlyph outlineGlyph = (FT_OutlineGlyph)glyphDesc;
FT_Outline_Embolden(&outlineGlyph->outline, weight);
}
if (outlineThickness != 0)
{
FT_Stroker stroker = static_cast<FT_Stroker>(m_stroker);
FT_Stroker_Set(stroker, static_cast<FT_Fixed>(outlineThickness * static_cast<float>(1 << 6)), FT_STROKER_LINECAP_ROUND, FT_STROKER_LINEJOIN_ROUND, 0);
FT_Glyph_Stroke(&glyphDesc, stroker, true);
}
}
// Convert the glyph to a bitmap (i.e. rasterize it)
FT_Glyph_To_Bitmap(&glyphDesc, FT_RENDER_MODE_NORMAL, 0, 1);
FT_Bitmap& bitmap = reinterpret_cast<FT_BitmapGlyph>(glyphDesc)->bitmap;
// Apply bold if necessary -- fallback technique using bitmap (lower quality)
if (!outline)
{
if (bold)
FT_Bitmap_Embolden(static_cast<FT_Library>(m_library), &bitmap, weight, weight);
if (outlineThickness != 0)
err() << "Failed to outline glyph (no fallback available)" << std::endl;
}
// Compute the glyph's advance offset
glyph.advance = static_cast<float>(face->glyph->metrics.horiAdvance) / static_cast<float>(1 << 6);
if (bold)
glyph.advance += static_cast<float>(weight) / static_cast<float>(1 << 6);
int width = bitmap.width;
int height = bitmap.rows;
if ((width > 0) && (height > 0))
{
// Leave a small padding around characters, so that filtering doesn't
// pollute them with pixels from neighbors
const unsigned int padding = 1;
width += 2 * padding;
height += 2 * padding;
// Get the glyphs page corresponding to the character size
Page& page = m_pages[characterSize];
// Find a good position for the new glyph into the texture
glyph.textureRect = findGlyphRect(page, width, height);
// Make sure the texture data is positioned in the center
// of the allocated texture rectangle
glyph.textureRect.left += padding;
glyph.textureRect.top += padding;
glyph.textureRect.width -= 2 * padding;
glyph.textureRect.height -= 2 * padding;
// Compute the glyph's bounding box
glyph.bounds.left = static_cast<float>(face->glyph->metrics.horiBearingX) / static_cast<float>(1 << 6);
glyph.bounds.top = -static_cast<float>(face->glyph->metrics.horiBearingY) / static_cast<float>(1 << 6);
glyph.bounds.width = static_cast<float>(face->glyph->metrics.width) / static_cast<float>(1 << 6) + outlineThickness * 2;
glyph.bounds.height = static_cast<float>(face->glyph->metrics.height) / static_cast<float>(1 << 6) + outlineThickness * 2;
// Resize the pixel buffer to the new size and fill it with transparent white pixels
m_pixelBuffer.resize(width * height * 4);
Uint8* current = &m_pixelBuffer[0];
Uint8* end = current + width * height * 4;
while (current != end)
{
(*current++) = 255;
(*current++) = 255;
(*current++) = 255;
(*current++) = 0;
}
// Extract the glyph's pixels from the bitmap
const Uint8* pixels = bitmap.buffer;
if (bitmap.pixel_mode == FT_PIXEL_MODE_MONO)
{
// Pixels are 1 bit monochrome values
for (unsigned int y = padding; y < height - padding; ++y)
{
for (unsigned int x = padding; x < width - padding; ++x)
{
// The color channels remain white, just fill the alpha channel
std::size_t index = x + y * width;
m_pixelBuffer[index * 4 + 3] = ((pixels[(x - padding) / 8]) & (1 << (7 - ((x - padding) % 8)))) ? 255 : 0;
}
pixels += bitmap.pitch;
}
}
else
{
// Pixels are 8 bits gray levels
for (unsigned int y = padding; y < height - padding; ++y)
{
for (unsigned int x = padding; x < width - padding; ++x)
{
// The color channels remain white, just fill the alpha channel
std::size_t index = x + y * width;
m_pixelBuffer[index * 4 + 3] = pixels[x - padding];
}
pixels += bitmap.pitch;
}
}
// Write the pixels to the texture
unsigned int x = glyph.textureRect.left - padding;
unsigned int y = glyph.textureRect.top - padding;
unsigned int w = glyph.textureRect.width + 2 * padding;
unsigned int h = glyph.textureRect.height + 2 * padding;
page.texture.update(&m_pixelBuffer[0], w, h, x, y);
}
// Delete the FT glyph
FT_Done_Glyph(glyphDesc);
// Done :)
return glyph;
}
void SubtitleRenderer::load_glyph(InternalChar ch) {
VGfloat escapement[2]{};
auto load_glyph_internal =
[&](FT_Face ft_face, VGFont vg_font, bool border) {
try {
auto glyph_index = FT_Get_Char_Index(ft_face, ch.codepoint());
ENFORCE(!FT_Load_Glyph(ft_face, glyph_index, FT_LOAD_NO_HINTING));
FT_Glyph glyph;
ENFORCE(!FT_Get_Glyph(ft_face->glyph, &glyph));
SCOPE_EXIT {FT_Done_Glyph(glyph);};
if (border)
ENFORCE(!FT_Glyph_StrokeBorder(&glyph, ft_stroker_, 0, 1));
ENFORCE(!FT_Glyph_To_Bitmap(&glyph, FT_RENDER_MODE_NORMAL, NULL, 1));
FT_BitmapGlyph bit_glyph = (FT_BitmapGlyph) glyph;
FT_Bitmap& bitmap = bit_glyph->bitmap;
VGImage image{};
VGfloat glyph_origin[2]{};
if (bitmap.width > 0 && bitmap.rows > 0) {
constexpr VGfloat blur_stddev = 0.52;
const int padding = static_cast<int>(3*blur_stddev + 0.5);
const int image_width = bitmap.width + padding*2;
const int image_height = bitmap.rows + padding*2;
image = vgCreateImage(VG_A_8, image_width, image_height,
VG_IMAGE_QUALITY_NONANTIALIASED);
assert(image);
if (bitmap.pitch > 0) {
vgImageSubData(image,
bitmap.buffer + bitmap.pitch*(bitmap.rows-1),
-bitmap.pitch,
VG_A_8,
padding,
padding,
bitmap.width,
bitmap.rows);
assert(!vgGetError());
} else {
vgImageSubData(image,
bitmap.buffer,
bitmap.pitch,
VG_A_8,
padding,
padding,
bitmap.width,
bitmap.rows);
assert(!vgGetError());
}
auto softened_image = vgCreateImage(VG_A_8,
image_width,
image_height,
VG_IMAGE_QUALITY_NONANTIALIASED);
assert(softened_image);
// Even out hard and soft edges
vgGaussianBlur(softened_image, image, blur_stddev, blur_stddev, VG_TILE_FILL);
assert(!vgGetError());
vgDestroyImage(image);
assert(!vgGetError());
image = softened_image;
glyph_origin[0] = static_cast<VGfloat>(padding - bit_glyph->left);
glyph_origin[1] = static_cast<VGfloat>(padding + bitmap.rows - bit_glyph->top - 1);
}
escapement[0] = static_cast<VGfloat>((ft_face->glyph->advance.x + 32) / 64);
escapement[1] = 0;
vgSetGlyphToImage(vg_font, ch.val, image, glyph_origin, escapement);
assert(!vgGetError());
if (image) {
vgDestroyImage(image);
assert(!vgGetError());
}
} catch(...) {
escapement[0] = 0;
escapement[1] = 0;
vgSetGlyphToImage(vg_font, ch.val, VG_INVALID_HANDLE, escapement, escapement);
assert(!vgGetError());
}
};
if (!ch.italic()) {
load_glyph_internal(ft_face_, vg_font_, false);
glyphs_[ch].advance = escapement[0];
load_glyph_internal(ft_face_, vg_font_border_, true);
} else {
load_glyph_internal(ft_face_italic_, vg_font_, false);
glyphs_[ch].advance = escapement[0];
load_glyph_internal(ft_face_italic_, vg_font_border_, true);
}
}
bool xFT2FontCharLoader::_loadResource(xWCharType& _char , xFT2FontChar*& pRes, int& ResSize,unsigned int arg)
{
//if(FT_Load_Glyph( m_FT_Face, FT_Get_Char_Index( m_FT_Face, _char ), FT_LOAD_DEFAULT ))
// throw std::runtime_error("FT_Load_Glyph failed");
FT_Int32 load_flags = FT_LOAD_RENDER|FT_LOAD_FORCE_AUTOHINT ;
if(m_bAntilias)
load_flags |= ( FT_LOAD_TARGET_NORMAL| FT_LOAD_TARGET_LIGHT);
else
load_flags |= ( FT_LOAD_MONOCHROME | FT_LOAD_TARGET_MONO );
if(pRes == NULL)
{
pRes = new xFT2FontChar(m_pRenderer , this );
if(pRes == NULL)
return false;
}
//得到字模
FT_UInt glyph_index;
/* retrieve glyph index from character code */
glyph_index = FT_Get_Char_Index( m_FT_Face, _char );
/* load glyph image into the slot (erase previous one) */
int error = FT_Load_Glyph( m_FT_Face, glyph_index, FT_LOAD_DEFAULT );
//if(m_bBold)
//{
// int xStrenth = GetBoldenStrength(m_bBold , m_w);
// int yStrenth = GetBoldenStrength(m_bBold , m_h);
// FT2_GlyphSlot_Embolden(m_FT_Face->glyph , xStrenth , yStrenth );
//}
if(m_bAntilias)
{
error = FT_Render_Glyph( m_FT_Face->glyph, FT_RENDER_MODE_NORMAL );
}
else
{
error = FT_Render_Glyph( m_FT_Face->glyph, FT_RENDER_MODE_NORMAL );
}
FT_Glyph glyph;
if(FT_Get_Glyph( m_FT_Face->glyph, &glyph ))
{
XEVOL_LOG(eXL_DEBUG_HIGH,"FT_Load_Glyph failed\n");
return false;
}
FT_BitmapGlyph bitmap_glyph = (FT_BitmapGlyph)glyph;
//取道位图数据
FT_Bitmap& bitmap = bitmap_glyph->bitmap;
//把位图数据拷贝自己定义的数据区里.这样旧可以画到需要的东西上面了。
int width = bitmap.width;
int height = bitmap.rows;
m_FT_Face->size->metrics.y_ppem;
m_FT_Face->glyph->metrics.horiAdvance;
pRes->m_adv_x = m_FT_Face->glyph->advance.x / 64.0f;
pRes->m_adv_y = m_FT_Face->size->metrics.y_ppem; //m_FT_Face->glyph->metrics.horiBearingY / 64.0f;
pRes->m_left = (float)bitmap_glyph->left;
pRes->m_top = (float)bitmap_glyph->top;
int tex_pitch = 0;
unsigned char* tex_pixel = NULL;
IBaseTexture* pTexture = NULL;
#ifndef _FONT_FULL_TEXTURE_
if(pRes->m_pTexture != NULL)
{
pRes->m_pTexture->KillObject();
}
if(width == 0 || height == 0)
{
FT_Done_Glyph(glyph);
return true;
}
if(m_pRenderer->isTextureSupport( PIXELFORMAT_ALPHA8 ) )
{
pRes->m_pTexture = m_pRenderer->createTexture( width,height, PIXELFORMAT_ALPHA8 , false);//Alpha8);
}
else
{
pRes->m_pTexture = m_pRenderer->createTexture( width,height, PIXELFORMAT_B8G8R8A8 , false);//RGBA);
}
if(pRes->m_pTexture == NULL)
return width == 0 && height == 0;
pTexture = pRes->m_pTexture;
xTextureLockArea lockInfo;
pTexture->lock(eLock_WriteDiscard , lockInfo);
tex_pixel = (unsigned char*)lockInfo.m_pixels ;
tex_pitch = lockInfo.m_picth ;
pRes->m_tex_w = width ;
pRes->m_tex_h = height;
#else
pTexture = m_pTexture;
pRes->m_tex_idx = m_idxManager.useIndex();
pRes->m_tex_y = pRes->m_tex_idx / m_nCharOfRow;
int nFontWidth = m_tex_w / m_nCharOfRow;
int nFontHeight = m_tex_h / m_nCharOfRow;
pRes->m_tex_y = nFontHeight * pRes->m_tex_y;
pRes->m_tex_x = (pRes->m_tex_idx % m_nCharOfRow ) * nFontWidth;
pRes->m_tex_w = width ;
pRes->m_tex_h = height;
xTextureLockArea lockInfo;
pTexture->lock(eLock_WriteDiscard , lockInfo);
tex_pixel = (unsigned char*)lockInfo.m_pixels ;
tex_pitch = lockInfo.m_picth ;
if(pTexture->format() == PIXELFORMAT_B8G8R8A8)
{
tex_pixel += lockInfo.m_picth * pRes->m_tex_y + pRes->m_tex_x * 4;
}
else
{
tex_pixel += lockInfo.m_picth * pRes->m_tex_y + pRes->m_tex_x;
}
#endif
float grayScale = 1.0f;
if( m_bAntilias == false ) grayScale = 1.3f;
//灰度图
if(bitmap.pixel_mode == FT_PIXEL_MODE_GRAY)
{
for(int y=0; y < height ; y++)
{
for(int x=0; x < width; x++)
{
int _y = y;
unsigned char _vl = 0;
if(x < bitmap.width && y < bitmap.rows)
{
_vl = (x>=bitmap.width || y>=bitmap.rows) ? 0 : bitmap.buffer[x + bitmap.width*y];
}
//if(_vl > 25 && _vl < 220) _vl = 220;
unsigned int iVal = _vl; iVal = (int)(grayScale * iVal);
if(iVal > 255) iVal = 255;
if(pTexture->format() == PIXELFORMAT_B8G8R8A8)
{
tex_pixel[(4*x + _y * tex_pitch)+0] = 0xff;
tex_pixel[(4*x + _y * tex_pitch)+1] = 0xff;
tex_pixel[(4*x + _y * tex_pitch)+2] = 0xff;
tex_pixel[(4*x + _y * tex_pitch)+3] = (unsigned char)iVal;
}
else
{
tex_pixel[(1*x + _y * tex_pitch)+0] = (unsigned char)iVal;
}
}
}
}
else if(bitmap.pixel_mode == FT_PIXEL_MODE_MONO) //单色图
{
for(int y=0; y < height ; y++)
{
for(int x=0; x < width; x++)
{
int _y = y;
unsigned char _vl = 0;
if(x < bitmap.width && y < bitmap.rows)
{
_vl = ((bitmap.buffer[(y * bitmap.pitch) + x / 8] << (x % 8)) & 0x80) ? 0xFFFFFFFF : 0x00000000;
}
unsigned int iVal = _vl; iVal = (int)(grayScale * iVal);
if(iVal > 255) iVal = 255;
if(pTexture->format() == PIXELFORMAT_B8G8R8A8)
{
tex_pixel[(4*x + _y * tex_pitch)+0] = 0xff;
tex_pixel[(4*x + _y * tex_pitch)+1] = 0xff;
tex_pixel[(4*x + _y * tex_pitch)+2] = 0xff;
tex_pixel[(4*x + _y * tex_pitch)+3] = (unsigned char)iVal;
}
else
{
tex_pixel[(1*x + _y * tex_pitch)+0] = (unsigned char)iVal;
}
}
}
}
pTexture->unlock(lockInfo);
pTexture->validate();
FT_Done_Glyph(glyph);
ResSize = 1;
return true;
}
void agg_text_renderer<T>::render(glyph_positions const& pos)
{
glyphs_.clear();
prepare_glyphs(pos);
FT_Error error;
FT_Vector start;
FT_Vector start_halo;
int height = pixmap_.height();
pixel_position const& base_point = pos.get_base_point();
start.x = static_cast<FT_Pos>(base_point.x * (1 << 6));
start.y = static_cast<FT_Pos>((height - base_point.y) * (1 << 6));
start_halo = start;
start.x += transform_.tx * 64;
start.y += transform_.ty * 64;
start_halo.x += halo_transform_.tx * 64;
start_halo.y += halo_transform_.ty * 64;
FT_Matrix halo_matrix;
halo_matrix.xx = halo_transform_.sx * 0x10000L;
halo_matrix.xy = halo_transform_.shx * 0x10000L;
halo_matrix.yy = halo_transform_.sy * 0x10000L;
halo_matrix.yx = halo_transform_.shy * 0x10000L;
FT_Matrix matrix;
matrix.xx = transform_.sx * 0x10000L;
matrix.xy = transform_.shx * 0x10000L;
matrix.yy = transform_.sy * 0x10000L;
matrix.yx = transform_.shy * 0x10000L;
// default formatting
double halo_radius = 0;
color black(0,0,0);
unsigned fill = black.rgba();
unsigned halo_fill = black.rgba();
double text_opacity = 1.0;
double halo_opacity = 1.0;
for (auto const& glyph : glyphs_)
{
halo_fill = glyph.properties.halo_fill.rgba();
halo_opacity = glyph.properties.halo_opacity;
halo_radius = glyph.properties.halo_radius * scale_factor_;
// make sure we've got reasonable values.
if (halo_radius <= 0.0 || halo_radius > 1024.0) continue;
FT_Glyph g;
error = FT_Glyph_Copy(glyph.image, &g);
if (!error)
{
FT_Glyph_Transform(g, &halo_matrix, &start_halo);
if (rasterizer_ == HALO_RASTERIZER_FULL)
{
stroker_->init(halo_radius);
FT_Glyph_Stroke(&g, stroker_->get(), 1);
error = FT_Glyph_To_Bitmap(&g, FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(g);
composite_bitmap(pixmap_,
&bit->bitmap,
halo_fill,
bit->left,
height - bit->top,
halo_opacity,
halo_comp_op_);
}
}
else
{
error = FT_Glyph_To_Bitmap(&g, FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(g);
render_halo(&bit->bitmap,
halo_fill,
bit->left,
height - bit->top,
halo_radius,
halo_opacity,
halo_comp_op_);
}
}
}
FT_Done_Glyph(g);
}
// render actual text
for (auto & glyph : glyphs_)
{
fill = glyph.properties.fill.rgba();
text_opacity = glyph.properties.text_opacity;
FT_Glyph_Transform(glyph.image, &matrix, &start);
error = FT_Glyph_To_Bitmap(&glyph.image ,FT_RENDER_MODE_NORMAL, 0, 1);
if (!error)
{
FT_BitmapGlyph bit = reinterpret_cast<FT_BitmapGlyph>(glyph.image);
composite_bitmap(pixmap_,
&bit->bitmap,
fill,
bit->left,
height - bit->top,
text_opacity,
comp_op_);
}
FT_Done_Glyph(glyph.image);
}
}
YUV_error text_to_overlay_player(p_info_rec* p_info, overlay* ovly, char* text,
int max_width, int min_width,
int x_margin, int y_margin,
int center,
int tab_width,
int enable_align_right,
char* font, const int size,
const int aspect_ratio_num,
const int aspect_ratio_den)
{
info_rec* info;
BYTE* srcLine;
BYTE* dstLine;
int j;
int error;
int result;
// initialise our data
if (*p_info == NULL)
{
result = allocate_info(p_info);
if (result < 0)
return result;
}
info = *p_info;
result = set_font(info, font, size, aspect_ratio_num, aspect_ratio_den);
if (result < 0)
return result;
// render text using freetype2
{
#define MAX_GLYPHS 100
FT_GlyphSlot slot = info->face->glyph; /* a small shortcut */
FT_UInt glyph_idx;
FT_UInt last_glyph;
FT_Vector delta;
FT_Bool use_kerning;
int pen_x, pen_y, n, margin;
FT_Glyph glyphs[MAX_GLYPHS]; /* glyph image */
FT_Vector pos [MAX_GLYPHS]; /* glyph position */
FT_UInt num_glyphs;
FT_UInt render_num_glyphs;
FT_UInt vis_last_glyph;
int vis_last; // index of end of last "word"
int vis_width; // width to vis_last
int x_offset = 0;
int align_right = 0;
int align_right_glyph = 0;
int align_right_shift;
use_kerning = FT_HAS_KERNING(info->face);
// compute initial pen position using font metrics
n = info->face->bbox.yMax - info->face->bbox.yMin;//info->face->ascender - info->face->descender;
pen_x = ((-info->face->bbox.xMin * size) + (n / 2)) / n;
pen_y = ((info->face->bbox.yMax * size) + (n / 2)) / n;
margin = pen_x;
// convert each character to a glyph and set its position
num_glyphs = 0;
vis_last = -1;
vis_last_glyph = 0;
vis_width = 0;
last_glyph = FT_Get_Char_Index(info->face, ' ');
for (n = 0; n < (int)strlen(text); n++)
{
if (text[n] == '\n')
break;
if (num_glyphs >= MAX_GLYPHS)
break;
if (tab_width > 0 && text[n] == '\t')
{
pen_x += size - (pen_x % size);
}
// a '>>' sequence results in alignment of the following text to the right
else if (enable_align_right && !align_right && text[n] == '>' && text[n + 1] == '>')
{
n += 1;
align_right = 1;
align_right_glyph = num_glyphs;
continue;
}
else
{
glyph_idx = FT_Get_Char_Index(info->face, text[n]);
if (use_kerning && last_glyph && glyph_idx)
{
FT_Get_Kerning(info->face, last_glyph, glyph_idx,
FT_KERNING_DEFAULT, &delta);
pen_x += delta.x / 64;
}
error = FT_Load_Glyph(info->face, glyph_idx, FT_LOAD_DEFAULT);
if (error)
continue; /* ignore errors */
error = FT_Get_Glyph(info->face->glyph, &glyphs[num_glyphs]);
if (error)
continue; /* ignore errors */
if (pen_y - slot->bitmap_top < 0)
{
fprintf(stderr, "Character '%c' ascends too high\n", text[n]);
pen_y = slot->bitmap_top;
}
if (pen_y - slot->bitmap_top + slot->bitmap.rows > size)
{
fprintf(stderr, "Character '%c' descends too low\n", text[n]);
exit(1);
}
pos[num_glyphs].x = pen_x;
pos[num_glyphs].y = pen_y;
pen_x += slot->advance.x / 64;
last_glyph = glyph_idx;
num_glyphs++;
}
if (pen_x + (margin * 2) + (x_margin * 2) > max_width)
break;
if (text[n] != ' ' &&
(text[n+1] == ' ' || text[n+1] == '\0' || text[n+1] == '\n'))
{
vis_last_glyph = num_glyphs;
vis_last = n;
vis_width = pen_x;
}
}
// truncate string to end of last word
if (vis_last < 0) // haven't found end of first word!
{
vis_last_glyph = num_glyphs;
vis_last = n - 1;
vis_width = pen_x;
}
if (vis_width + (margin * 2) + (x_margin * 2) > max_width)
{
vis_last_glyph--;
vis_last--;
vis_width -= slot->advance.x / 64;
}
render_num_glyphs = vis_last_glyph;
result = vis_last + 1;
// do right alignment if there is space
if (align_right)
{
align_right_shift = max_width - (vis_width + (margin * 2) + (x_margin * 2));
if (align_right_shift > 0)
{
for (n = align_right_glyph; n < (int)render_num_glyphs; n++)
{
pos[n].x += align_right_shift;
}
}
}
// find start of next word
while (text[result] == ' ' || text[result] == '\n')
result++;
// set overlay dimensions
ovly->w = vis_width + (margin * 2) + (x_margin * 2);
// set width >= min_width and center
if (ovly->w < min_width && min_width <= max_width)
{
if (center)
{
x_offset = (min_width - ovly->w) / 2;
}
ovly->w = min_width;
}
ovly->h = size + 2 * y_margin;
// fprintf(stderr, "Area of '%s' = (%d x %d)\n", text, ovly->w, ovly->h);
ovly->ssx = -1;
ovly->ssy = -1;
// alloc memory
ovly->buff = malloc(ovly->w * ovly->h * 2);
if (ovly->buff == NULL)
return YUV_no_memory;
memset(ovly->buff, 0, ovly->w * ovly->h * 2);
ovly->Cbuff = NULL;
// render glyphs
for (n = 0; n < (int)render_num_glyphs; n++)
{
error = FT_Glyph_To_Bitmap(&glyphs[n], FT_RENDER_MODE_NORMAL,
0, 1);
if (!error)
{
FT_BitmapGlyph bit = (FT_BitmapGlyph)glyphs[n];
srcLine = bit->bitmap.buffer;
dstLine = ovly->buff + ((pos[n].y - bit->top) * ovly->w) +
pos[n].x + bit->left +
x_margin +
y_margin * ovly->w +
x_offset;
// TODO: fix the problem with offsets
if (dstLine < ovly->buff)
dstLine = ovly->buff;
for (j = 0; j < bit->bitmap.rows; j++)
{
memcpy(dstLine, srcLine, bit->bitmap.width);
srcLine += bit->bitmap.width;
dstLine += ovly->w;
}
}
}
// cleanup glyphs
for (n = 0; n < (int)num_glyphs; n++)
{
FT_Done_Glyph(glyphs[n]);
}
}
return result; // length of string actually rendered
}
FT_Get_Glyph( FT_GlyphSlot slot,
FT_Glyph *aglyph )
{
FT_Library library;
FT_Error error;
FT_Glyph glyph;
const FT_Glyph_Class* clazz = 0;
if ( !slot )
return FT_Err_Invalid_Slot_Handle;
library = slot->library;
if ( !aglyph )
return FT_Err_Invalid_Argument;
/* if it is a bitmap, that's easy :-) */
if ( slot->format == FT_GLYPH_FORMAT_BITMAP )
clazz = &ft_bitmap_glyph_class;
/* it it is an outline too */
else if ( slot->format == FT_GLYPH_FORMAT_OUTLINE )
clazz = &ft_outline_glyph_class;
else
{
/* try to find a renderer that supports the glyph image format */
FT_Renderer render = FT_Lookup_Renderer( library, slot->format, 0 );
if ( render )
clazz = &render->glyph_class;
}
if ( !clazz )
{
error = FT_Err_Invalid_Glyph_Format;
goto Exit;
}
/* create FT_Glyph object */
error = ft_new_glyph( library, clazz, &glyph );
if ( error )
goto Exit;
/* copy advance while converting it to 16.16 format */
glyph->advance.x = slot->advance.x << 10;
glyph->advance.y = slot->advance.y << 10;
/* now import the image from the glyph slot */
error = clazz->glyph_init( glyph, slot );
/* if an error occurred, destroy the glyph */
if ( error )
FT_Done_Glyph( glyph );
else
*aglyph = glyph;
Exit:
return error;
}
static GF_Glyph *ft_load_glyph(GF_FontReader *dr, u32 glyph_name)
{
GF_Glyph *glyph;
u32 glyph_idx;
FT_BBox bbox;
FT_OutlineGlyph outline;
ft_outliner outl;
FT_Outline_Funcs ft_outl_funcs;
FTBuilder *ftpriv = (FTBuilder *)dr->udta;
if (!ftpriv->active_face || !glyph_name) return NULL;
FT_Select_Charmap(ftpriv->active_face, FT_ENCODING_UNICODE);
glyph_idx = FT_Get_Char_Index(ftpriv->active_face, glyph_name);
/*missing glyph*/
if (!glyph_idx) {
GF_LOG(GF_LOG_WARNING, GF_LOG_PARSER, ("[FreeType] Glyph not found for char %d in font %s (style %s)\n", glyph_name, ftpriv->active_face->family_name, ftpriv->active_face->style_name));
return NULL;
}
/*work in design units*/
FT_Load_Glyph(ftpriv->active_face, glyph_idx, FT_LOAD_NO_SCALE | FT_LOAD_NO_BITMAP);
FT_Get_Glyph(ftpriv->active_face->glyph, (FT_Glyph*)&outline);
#ifdef FT_GLYPH_FORMAT_OUTLINE
/*oops not vectorial...*/
if (outline->root.format != FT_GLYPH_FORMAT_OUTLINE) return NULL;
#endif
GF_SAFEALLOC(glyph, GF_Glyph);
GF_SAFEALLOC(glyph->path, GF_Path);
/*setup outliner*/
ft_outl_funcs.shift = 0;
ft_outl_funcs.delta = 0;
ft_outl_funcs.move_to = ft_move_to;
ft_outl_funcs.line_to = ft_line_to;
ft_outl_funcs.conic_to = ft_conic_to;
ft_outl_funcs.cubic_to = ft_cubic_to;
outl.path = glyph->path;
outl.ftpriv = ftpriv;
/*FreeType is marvelous and gives back the right advance on space char !!!*/
FT_Outline_Decompose(&outline->outline, &ft_outl_funcs, &outl);
FT_Glyph_Get_CBox((FT_Glyph) outline, ft_glyph_bbox_unscaled, &bbox);
glyph->ID = glyph_name;
glyph->utf_name = glyph_name;
glyph->horiz_advance = ftpriv->active_face->glyph->metrics.horiAdvance;
glyph->vert_advance = ftpriv->active_face->glyph->metrics.vertAdvance;
/*
glyph->x = bbox.xMin;
glyph->y = bbox.yMax;
*/
glyph->width = ftpriv->active_face->glyph->metrics.width;
glyph->height = ftpriv->active_face->glyph->metrics.height;
FT_Done_Glyph((FT_Glyph) outline);
return glyph;
}
~glyph_t () { FT_Done_Glyph(image);}
void EMSCRIPTEN_KEEPALIVE c_Glyph_done(long glyph) {
FT_Done_Glyph((FT_Glyph)glyph);
}
//-------------------------------------------------------------------------------------------------------
StringManager::BChar::~BChar()
{
FT_Done_Glyph(m_pGlyph);
}
Glyph Font::loadGlyph(Uint32 codePoint, unsigned int characterSize, bool bold) const
{
// The glyph to return
Glyph glyph;
// First, transform our ugly void* to a FT_Face
FT_Face face = static_cast<FT_Face>(m_face);
if (!face)
return glyph;
// Set the character size
if (!setCurrentSize(characterSize))
return glyph;
// Load the glyph corresponding to the code point
if (FT_Load_Char(face, codePoint, FT_LOAD_TARGET_NORMAL | FT_LOAD_FORCE_AUTOHINT) != 0)
return glyph;
// Retrieve the glyph
FT_Glyph glyphDesc;
if (FT_Get_Glyph(face->glyph, &glyphDesc) != 0)
return glyph;
// Apply bold if necessary -- first technique using outline (highest quality)
FT_Pos weight = 1 << 6;
bool outline = (glyphDesc->format == FT_GLYPH_FORMAT_OUTLINE);
if (bold && outline)
{
FT_OutlineGlyph outlineGlyph = (FT_OutlineGlyph)glyphDesc;
FT_Outline_Embolden(&outlineGlyph->outline, weight);
}
// Convert the glyph to a bitmap (i.e. rasterize it)
FT_Glyph_To_Bitmap(&glyphDesc, FT_RENDER_MODE_NORMAL, 0, 1);
FT_Bitmap& bitmap = reinterpret_cast<FT_BitmapGlyph>(glyphDesc)->bitmap;
// Apply bold if necessary -- fallback technique using bitmap (lower quality)
if (bold && !outline)
{
FT_Bitmap_Embolden(static_cast<FT_Library>(m_library), &bitmap, weight, weight);
}
// Compute the glyph's advance offset
glyph.advance = static_cast<float>(face->glyph->metrics.horiAdvance) / static_cast<float>(1 << 6);
if (bold)
glyph.advance += static_cast<float>(weight) / static_cast<float>(1 << 6);
int width = bitmap.width;
int height = bitmap.rows;
if ((width > 0) && (height > 0))
{
// Leave a small padding around characters, so that filtering doesn't
// pollute them with pixels from neighbors
const unsigned int padding = 1;
// Get the glyphs page corresponding to the character size
Page& page = m_pages[characterSize];
// Find a good position for the new glyph into the texture
glyph.textureRect = findGlyphRect(page, width + 2 * padding, height + 2 * padding);
// Make sure the texture data is positioned in the center
// of the allocated texture rectangle
glyph.textureRect.left += padding;
glyph.textureRect.top += padding;
glyph.textureRect.width -= 2 * padding;
glyph.textureRect.height -= 2 * padding;
// Compute the glyph's bounding box
glyph.bounds.left = static_cast<float>(face->glyph->metrics.horiBearingX) / static_cast<float>(1 << 6);
glyph.bounds.top = -static_cast<float>(face->glyph->metrics.horiBearingY) / static_cast<float>(1 << 6);
glyph.bounds.width = static_cast<float>(face->glyph->metrics.width) / static_cast<float>(1 << 6);
glyph.bounds.height = static_cast<float>(face->glyph->metrics.height) / static_cast<float>(1 << 6);
// Extract the glyph's pixels from the bitmap
m_pixelBuffer.resize(width * height * 4, 255);
const Uint8* pixels = bitmap.buffer;
if (bitmap.pixel_mode == FT_PIXEL_MODE_MONO)
{
// Pixels are 1 bit monochrome values
for (int y = 0; y < height; ++y)
{
for (int x = 0; x < width; ++x)
{
// The color channels remain white, just fill the alpha channel
std::size_t index = (x + y * width) * 4 + 3;
m_pixelBuffer[index] = ((pixels[x / 8]) & (1 << (7 - (x % 8)))) ? 255 : 0;
}
pixels += bitmap.pitch;
}
}
else
{
// Pixels are 8 bits gray levels
for (int y = 0; y < height; ++y)
{
for (int x = 0; x < width; ++x)
{
// The color channels remain white, just fill the alpha channel
std::size_t index = (x + y * width) * 4 + 3;
m_pixelBuffer[index] = pixels[x];
}
pixels += bitmap.pitch;
}
}
// Write the pixels to the texture
unsigned int x = glyph.textureRect.left;
unsigned int y = glyph.textureRect.top;
unsigned int w = glyph.textureRect.width;
unsigned int h = glyph.textureRect.height;
page.texture.update(&m_pixelBuffer[0], w, h, x, y);
}
// Delete the FT glyph
FT_Done_Glyph(glyphDesc);
// Force an OpenGL flush, so that the font's texture will appear updated
// in all contexts immediately (solves problems in multi-threaded apps)
glCheck(glFlush());
// Done :)
return glyph;
}
////////////////////////////////////////////////////////////
/// Create a bitmap font from a font face and a characters set
////////////////////////////////////////////////////////////
FT_Error FontLoader::CreateBitmapFont(FT_Face FontFace, unsigned int CharSize, std::wstring Charset, Font& LoadedFont)
{
// If no characters set has been provided, we take the default one (31 - 255 ASCII codes)
if (Charset.empty())
Charset = ourDefaultCharset;
// Always add these special characters
Charset += L" \n\v\t";
// Clear the font's previous character map
LoadedFont.myCharacters.clear();
// Let's find how many characters to put in each row to make them fit into a squared texture
GLint MaxSize;
GLCheck(glGetIntegerv(GL_MAX_TEXTURE_SIZE, &MaxSize));
int NbChars = static_cast<int>(sqrt(static_cast<double>(Charset.length())) * 0.75);
// Clamp the character size to make sure we won't create a texture too big
if (NbChars * CharSize >= static_cast<unsigned int>(MaxSize))
CharSize = MaxSize / NbChars;
// Initialize the dimensions
unsigned int Left = 0;
unsigned int Top = 0;
unsigned int TexWidth = Image::GetValidTextureSize(CharSize * NbChars);
unsigned int TexHeight = Image::GetValidTextureSize(CharSize * NbChars);
std::vector<unsigned int> Tops(TexWidth, 0);
// Create the bitmap font (all black for now -- we're going to fill it up)
LoadedFont.myTexture.Create(TexWidth, TexHeight, Color(0, 0, 0, 0));
// Setup the font size
FT_Error Error = FT_Set_Pixel_Sizes(FontFace, CharSize, CharSize);
if (Error)
return Error;
// Select the unicode character map
Error = FT_Select_Charmap(FontFace, FT_ENCODING_UNICODE);
if (Error)
return Error;
// Render the characters set to a bitmap
std::map<wchar_t, IntRect> Coords;
for (std::size_t i = 0; i < Charset.length(); ++i)
{
// Get the current character to generate
wchar_t c = Charset[i];
Font::Character& CurChar = LoadedFont.myCharacters[c];
// Load the glyph corresponding to the current character
Error = FT_Load_Char(FontFace, c, FT_LOAD_DEFAULT);
if (Error)
return Error;
// Convert the glyph to a bitmap (ie. rasterize it)
FT_Glyph Glyph;
Error = FT_Get_Glyph(FontFace->glyph, &Glyph);
if (Error)
return Error;
FT_Glyph_To_Bitmap(&Glyph, ft_render_mode_normal, 0, 1);
FT_BitmapGlyph BitmapGlyph = (FT_BitmapGlyph)Glyph;
FT_Bitmap& Bitmap = BitmapGlyph->bitmap;
// Should we handle other pixel modes ?
if (Bitmap.pixel_mode != FT_PIXEL_MODE_GRAY)
return FT_Err_Cannot_Render_Glyph;
// Make sure we don't go over the texture width
if (Left + Bitmap.width + 1 >= TexWidth)
Left = 0;
// Compute the top coordinate
Top = Tops[Left];
for (int x = 0; x < Bitmap.width + 1; ++x)
Top = std::max(Top, Tops[Left + x]);
Top++;
// Make sure we don't go over the texture height -- resize it if we need more space
if (Top + Bitmap.rows + 1 >= TexHeight)
{
TexHeight *= 2;
LoadedFont.myTexture.Resize(TexWidth, TexHeight, Color(0, 0, 0, 0));
}
// Store the character's position and size
CurChar.Rect.Left = BitmapGlyph->left;
CurChar.Rect.Top = -BitmapGlyph->top;
CurChar.Rect.Right = CurChar.Rect.Left + Bitmap.width;
CurChar.Rect.Bottom = Bitmap.rows - BitmapGlyph->top;
CurChar.Advance = FontFace->glyph->advance.x / 64;
// Texture size may change, so let the texture coordinates be calculated later
Coords[c] = IntRect(Left + 1, Top + 1, Left + Bitmap.width + 1, Top + Bitmap.rows + 1);
// Draw the glyph into our bitmap font
const Uint8* Pixels = Bitmap.buffer;
for (int y = 0; y < Bitmap.rows; ++y)
{
for (int x = 0; x < Bitmap.width; ++x)
{
LoadedFont.myTexture.SetPixel(x + Left + 1, y + Top + 1, Color(255, 255, 255, Pixels[x]));
}
Pixels += Bitmap.pitch;
}
// Update the rendering coordinates
for (int x = 0; x < Bitmap.width + 1; ++x)
Tops[Left + x] = Top + Bitmap.rows;
Left += Bitmap.width + 1;
// Delete the glyph
FT_Done_Glyph(Glyph);
}
// Now that the texture has its final size, we can precompute texture coordinates
for (std::size_t i = 0; i < Charset.size(); ++i)
{
wchar_t c = Charset[i];
LoadedFont.myCharacters[c].Coord = LoadedFont.myTexture.GetTexCoords(Coords[c], false);
}
// Update the character size (it may have been changed by the function)
LoadedFont.myCharSize = CharSize;
return 0;
}
fz_pixmap *
fz_renderftstrokedglyph(fz_font *font, int gid, fz_matrix trm, fz_matrix ctm, fz_strokestate *state)
{
FT_Face face = font->ftface;
float expansion = fz_matrixexpansion(ctm);
int linewidth = state->linewidth * expansion * 64 / 2;
FT_Matrix m;
FT_Vector v;
FT_Error fterr;
FT_Stroker stroker;
FT_Glyph glyph;
FT_BitmapGlyph bitmap;
fz_pixmap *pix;
int y;
m.xx = trm.a * 64; /* should be 65536 */
m.yx = trm.b * 64;
m.xy = trm.c * 64;
m.yy = trm.d * 64;
v.x = trm.e * 64;
v.y = trm.f * 64;
fterr = FT_Set_Char_Size(face, 65536, 65536, 72, 72); /* should be 64, 64 */
if (fterr)
{
fz_warn("FT_Set_Char_Size: %s", ft_errorstring(fterr));
return nil;
}
FT_Set_Transform(face, &m, &v);
fterr = FT_Load_Glyph(face, gid, FT_LOAD_NO_BITMAP | FT_LOAD_NO_HINTING);
if (fterr)
{
fz_warn("FT_Load_Glyph(gid %d): %s", gid, ft_errorstring(fterr));
return nil;
}
fterr = FT_Stroker_New(fz_ftlib, &stroker);
if (fterr)
{
fz_warn("FT_Stroker_New: %s", ft_errorstring(fterr));
return nil;
}
FT_Stroker_Set(stroker, linewidth, state->linecap, state->linejoin, state->miterlimit * 65536);
fterr = FT_Get_Glyph(face->glyph, &glyph);
if (fterr)
{
fz_warn("FT_Get_Glyph: %s", ft_errorstring(fterr));
FT_Stroker_Done(stroker);
return nil;
}
fterr = FT_Glyph_Stroke(&glyph, stroker, 1);
if (fterr)
{
fz_warn("FT_Glyph_Stroke: %s", ft_errorstring(fterr));
FT_Done_Glyph(glyph);
FT_Stroker_Done(stroker);
return nil;
}
fterr = FT_Glyph_To_Bitmap(&glyph, FT_RENDER_MODE_NORMAL, 0, 1);
if (fterr)
{
fz_warn("FT_Glyph_To_Bitmap: %s", ft_errorstring(fterr));
FT_Done_Glyph(glyph);
FT_Stroker_Done(stroker);
return nil;
}
bitmap = (FT_BitmapGlyph)glyph;
pix = fz_newpixmap(NULL,
bitmap->left,
bitmap->top - bitmap->bitmap.rows,
bitmap->bitmap.width,
bitmap->bitmap.rows);
for (y = 0; y < pix->h; y++)
{
memcpy(pix->samples + y * pix->w,
bitmap->bitmap.buffer + (pix->h - y - 1) * bitmap->bitmap.pitch,
pix->w);
}
FT_Done_Glyph(glyph);
FT_Stroker_Done(stroker);
return pix;
}
static say_glyph *say_font_load_glyph(say_font *font, say_font_page *page,
uint32_t codepoint, uint8_t bold,
size_t size) {
uint32_t bold_codepoint = ((bold ? 1 : 0) << 31) | codepoint;
say_glyph *glyph = malloc(sizeof(say_glyph));
say_table_set(page->glyphs, bold_codepoint, glyph);
glyph->offset = 0;
glyph->bounds = say_make_rect(2, 0, 2, 2);
glyph->sub_rect = say_make_rect(2, 0, 2, 2);
if (!(font->face && say_font_set_size(font, size)))
return glyph;
if (FT_Load_Char(font->face, codepoint, FT_LOAD_TARGET_NORMAL) != 0)
return glyph;
FT_Glyph ft_glyph;
if (FT_Get_Glyph(font->face->glyph, &ft_glyph) != 0)
return glyph;
FT_Pos weight = 1 << 6;
uint8_t outline = ft_glyph->format == FT_GLYPH_FORMAT_OUTLINE;
if (bold && outline) {
FT_OutlineGlyph outline_glyph = (FT_OutlineGlyph)ft_glyph;
FT_Outline_Embolden(&outline_glyph->outline, weight);
}
FT_Glyph_To_Bitmap(&ft_glyph, FT_RENDER_MODE_NORMAL, 0, 1);
FT_BitmapGlyph bitmap_glyph = (FT_BitmapGlyph)ft_glyph;
FT_Bitmap *bitmap = &bitmap_glyph->bitmap;
if (bold && !outline) {
FT_Bitmap_Embolden(font->library, bitmap, weight, weight);
}
glyph->offset = ft_glyph->advance.x >> 16;
if (bold)
glyph->offset += weight >> 6;
int width = bitmap->width;
int height = bitmap->rows;
if (width > 0 && height > 0) {
static const int padding = 1;
glyph->sub_rect = say_page_find_rect(page,
width + (2 * padding),
height + (2 * padding));
glyph->bounds.x = +bitmap_glyph->left - padding;
glyph->bounds.y = -bitmap_glyph->top - padding;
glyph->bounds.w = width + (2 * padding);
glyph->bounds.h = height + (2 * padding);
say_rect actual_rect = glyph->sub_rect;
actual_rect.x += padding;
actual_rect.y += padding;
actual_rect.w -= 2 * padding;
actual_rect.h -= 2 * padding;
uint8_t *pixels = bitmap->buffer;
if (bitmap->pixel_mode == FT_PIXEL_MODE_MONO) {
for (int y = actual_rect.y; y < actual_rect.y + actual_rect.h; y++) {
for (int x = actual_rect.x; x < actual_rect.x + actual_rect.w; x++) {
int pixel_x = x - actual_rect.x;
uint8_t alpha = ((pixels[pixel_x / 8]) &
(1 << (7 - (pixel_x % 8)))) ? 255 : 0;
say_image_set(page->image, x, y,
say_make_color(255, 255, 255, alpha));
}
pixels += bitmap->pitch;
}
}
else {
for (int y = actual_rect.y; y < actual_rect.y + actual_rect.h;
y++) {
for (int x = actual_rect.x; x < actual_rect.x + actual_rect.w;
x++) {
int pixel_x = x - actual_rect.x;
say_image_set(page->image, x, y,
say_make_color(255, 255, 255, pixels[pixel_x]));
}
pixels += bitmap->pitch;
}
}
}
FT_Done_Glyph(ft_glyph);
return glyph;
}
static FT_Error
Render_Stroke( int num_indices,
int first_index )
{
int start_x, start_y, step_y, x, y;
int i;
FT_Size size;
FT_Face face;
FT_GlyphSlot slot;
FT_Fixed radius;
error = FTDemo_Get_Size( handle, &size );
if ( error )
{
/* probably a non-existent bitmap font size */
return error;
}
INIT_SIZE( size, start_x, start_y, step_y, x, y );
face = size->face;
slot = face->glyph;
radius = status.radius * ( status.ptsize * status.res / 72 );
FT_Stroker_Set( handle->stroker, radius,
FT_STROKER_LINECAP_ROUND,
FT_STROKER_LINEJOIN_ROUND,
0 );
for ( i = first_index; i < num_indices; i++ )
{
int gindex;
if ( handle->encoding == FT_ENCODING_NONE )
gindex = i;
else
gindex = FTDemo_Get_Index( handle, i );
error = FT_Load_Glyph( face, gindex,
handle->load_flags | FT_LOAD_NO_BITMAP );
if ( !error && slot->format == FT_GLYPH_FORMAT_OUTLINE )
{
FT_Glyph glyph;
error = FT_Get_Glyph( slot, &glyph );
if ( error )
goto Next;
error = FT_Glyph_Stroke( &glyph, handle->stroker, 1 );
if ( error )
{
FT_Done_Glyph( glyph );
goto Next;
}
error = FTDemo_Draw_Glyph( handle, display, glyph, &x, &y );
if ( !error )
FT_Done_Glyph( glyph );
if ( error )
goto Next;
else if ( X_TOO_LONG( x, size, display ) )
{
x = start_x;
y += step_y;
if ( Y_TOO_LONG( y, size, display ) )
break;
}
}
else
Next:
status.Fail++;
}
return error;
}
bool Font::CreateFromFile( const char* path, const uint32_t font_size, const bool smooth, const uint32_t start_char, const size_t num_chars )
{
if( path == NULL || font_size == 0 || num_chars == 0 || _num_glyphs > 0 ) return false;
Mojo::Services::Filesystem* filesystem = MOJO_GET_SERVICE(Filesystem);
Mojo::Filesystem::File* file = filesystem->Open(path, Mojo::Filesystem::FILE_READ);
if( !file ) return false;
size_t file_len = filesystem->Length(file);
if( file_len == 0 ) {
filesystem->Close(file);
return false;
}
// todo: Use FT_Open_Face to read the file instead?
uint8_t* buffer = new uint8_t[file_len]; {
uint32_t num_bytes_read = 0;
while( num_bytes_read < file_len ) {
size_t read = filesystem->Read(file, file_len - num_bytes_read, (void*)&buffer[num_bytes_read]);
mojo_assertf(read > 0, "Font::CreateFromFile\n -> Services/Filesystem error?\n");
num_bytes_read += read;
}
}
filesystem->Close(file);
FT_Face ft_face;
if( FT_New_Memory_Face(Mojo::GetFreeTypeLibrary(), (const FT_Byte*)buffer, file_len, 0, &ft_face) ) {
delete[] buffer;
return false;
}
FT_Set_Char_Size(ft_face, font_size * 64, font_size * 64, 72, 72);
const float line_height = ft_face->size->metrics.height >> 6;
// Load the glyphs
Font::Glyph* glyphs = new Font::Glyph[num_chars];
FT_Glyph* ft_glyphs = new FT_Glyph[num_chars];
FT_BitmapGlyph* bm_glyphs = (FT_BitmapGlyph*)ft_glyphs;
float blo = 0.0f;
uint32_t bm_max_width = 0, bm_max_height = 0;
for( uint32_t i = 0; i < num_chars; ++i ) {
FT_Load_Char(ft_face, start_char + i, FT_LOAD_DEFAULT);
FT_Get_Glyph(ft_face->glyph, &ft_glyphs[i]);
glyphs[i].x_advance = ft_face->glyph->advance.x >> 6;
glyphs[i].y_advance = ft_face->glyph->advance.y >> 6;
glyphs[i].x_bearing = (FT_HAS_VERTICAL(ft_face) ? ft_face->glyph->metrics.vertBearingX : ft_face->glyph->metrics.horiBearingX) >> 6;
glyphs[i].y_bearing = (FT_HAS_VERTICAL(ft_face) ? ft_face->glyph->metrics.vertBearingY : ft_face->glyph->metrics.horiBearingY) >> 6;
FT_Glyph_To_Bitmap(&ft_glyphs[i], smooth ? FT_RENDER_MODE_NORMAL : FT_RENDER_MODE_MONO, 0, 1);
const FT_Bitmap bitmap = bm_glyphs[i]->bitmap;
glyphs[i].width = bitmap.width;
glyphs[i].height = bitmap.rows;
bm_max_width = bm_max_width < bitmap.width ? bitmap.width : bm_max_width;
bm_max_height = bm_max_height < bitmap.rows ? bitmap.rows : bm_max_height;
const float gbl = -glyphs[i].y_bearing + glyphs[i].height;
blo = (blo < gbl) ? gbl : blo;
}
// Determine the texture atlas size
uint32_t atlas_width = 0, atlas_height = 0; {
static const struct { uint32_t width, height, area; } atlas_sizes[] = {
{ 64, 64, 64 * 64 }, { 128, 128, 128 * 128 },
{ 256, 256, 256 * 256 }, { 512, 512, 512 * 512 }
};
uint32_t min_area = 0;
for( uint32_t i = 0; i < num_chars; ++i ) min_area += uint32_t((glyphs[i].width + 2) * (bm_max_height + 2));
for( uint32_t i = 0; i < 4; ++i ) {
if( atlas_sizes[i].area < min_area ) continue;
const uint32_t index = (i > 3) ? 3 : i;
atlas_width = atlas_sizes[index].width;
atlas_height = atlas_sizes[index].height;
break;
}
if( atlas_width == 0 || atlas_height == 0 ) {
for( uint32_t i = 0; i < num_chars; ++i ) FT_Done_Glyph(ft_glyphs[i]);
delete[] ft_glyphs;
delete[] glyphs;
FT_Done_Face(ft_face);
delete[] buffer;
return false;
}
}
Mojo::TextureAtlas tex_atlas = Mojo::TextureAtlas(atlas_width, atlas_height, 32);
Mojo::BookshelfTexturePacker tex_packer = Mojo::BookshelfTexturePacker(&tex_atlas);
uint8_t* bm_buffer = new uint8_t[bm_max_width * bm_max_height * 4];
for( uint32_t i = 0; i < num_chars; ++i ) {
const FT_Bitmap bitmap = bm_glyphs[i]->bitmap;
if( bitmap.width == 0 || bitmap.rows == 0 ) continue;
memset((void*)bm_buffer, 255, bm_max_width * bm_max_height * 4);
switch( bitmap.pixel_mode ) {
default: {
mojo_assertf(0, "Font::CreateFromFile()\n -> Pixel mode not supported.\n");
} break;
case FT_PIXEL_MODE_MONO: {
const uint8_t* bm_pixels = (const uint8_t*)bitmap.buffer;
const uint32_t y_offset = 0;
for( uint32_t y = 0; y < bitmap.rows; ++y ) {
for( uint32_t x = 0; x < bitmap.width; ++x ) bm_buffer[(x + y * bitmap.width) * 4 + 3] = ((bm_pixels[x / 8]) & (1 << (7 - (x % 8)))) ? 0xFF : 0x00;
bm_pixels += bitmap.pitch;
}
} break;
case FT_PIXEL_MODE_GRAY: {
const uint8_t* bm_pixels = (const uint8_t*)bitmap.buffer;
for( uint32_t y = 0; y < bitmap.rows; ++y ) {
for( uint32_t x = 0; x < bitmap.width; ++x ) bm_buffer[(x + y * bitmap.width) * 4 + 3] = bm_pixels[x];
bm_pixels += bitmap.pitch;
}
} break;
}
Mojo::Recti packed_rect;
if( !tex_packer.Pack(bitmap.width, bitmap.rows, 1, bm_buffer, packed_rect) ) {
Mojo::DebugPrintf(DBG_WARNING, "Font::CreateFromFile()\n -> unable to pack character '%c'\n", i + start_char);
}
glyphs[i].tex_coords[0] = (float)packed_rect.x / atlas_width;
glyphs[i].tex_coords[1] = (float)packed_rect.y / atlas_height;
glyphs[i].tex_coords[2] = (float)(packed_rect.x + packed_rect.width) / atlas_width;
glyphs[i].tex_coords[3] = (float)(packed_rect.y + packed_rect.height) / atlas_height;
}
delete[] bm_buffer;
// Unload the glyphs
for( uint32_t i = 0; i < num_chars; ++i ) FT_Done_Glyph(ft_glyphs[i]);
delete[] ft_glyphs;
FT_Done_Face(ft_face);
delete[] buffer;
// Update
_font_atlas = tex_atlas.Compile();
_start_glyph = start_char;
_num_glyphs = num_chars;
_glyphs = glyphs;
_base_line = bm_max_height - blo;
_line_height = line_height;
return true;
}
static int LayoutLine( filter_t *p_filter,
paragraph_t *p_paragraph,
int i_start_offset, int i_end_offset,
line_desc_t **pp_line )
{
if( p_paragraph->i_size <= 0 || p_paragraph->i_runs_count <= 0
|| i_start_offset >= i_end_offset
|| i_start_offset < 0 || i_start_offset >= p_paragraph->i_size
|| i_end_offset <= 0 || i_end_offset > p_paragraph->i_size )
{
msg_Err( p_filter,
"LayoutLine() invalid parameters. "
"Paragraph size: %d. Runs count: %d. "
"Start offset: %d. End offset: %d",
p_paragraph->i_size, p_paragraph->i_runs_count,
i_start_offset, i_end_offset );
return VLC_EGENERIC;
}
line_desc_t *p_line = NewLine( i_end_offset - i_start_offset );
if( !p_line )
return VLC_ENOMEM;
filter_sys_t *p_sys = p_filter->p_sys;
int i_last_run = -1;
run_desc_t *p_run = 0;
text_style_t *p_style = 0;
FT_Face p_face = 0;
FT_Vector pen = { .x = 0, .y = 0 };
int i_line_index = 0;
int i_font_width = 0;
int i_ul_offset = 0;
int i_ul_thickness = 0;
#ifdef HAVE_FRIBIDI
fribidi_reorder_line( 0, p_paragraph->p_types + i_start_offset,
i_end_offset - i_start_offset,
0, p_paragraph->paragraph_type,
p_paragraph->p_levels + i_start_offset,
0, p_paragraph->pi_reordered_indices + i_start_offset );
#endif
for( int i = i_start_offset; i < i_end_offset; ++i, ++i_line_index )
{
int i_paragraph_index;
#ifdef HAVE_FRIBIDI
i_paragraph_index = p_paragraph->pi_reordered_indices[ i ];
#else
i_paragraph_index = i;
#endif
line_character_t *p_ch = p_line->p_character + i_line_index;
glyph_bitmaps_t *p_bitmaps =
p_paragraph->p_glyph_bitmaps + i_paragraph_index;
if( !p_bitmaps->p_glyph )
{
--i_line_index;
continue;
}
if( i_last_run != p_paragraph->pi_run_ids[ i_paragraph_index ] )
{
i_last_run = p_paragraph->pi_run_ids[ i_paragraph_index ];
p_run = p_paragraph->p_runs + i_last_run;
p_style = p_run->p_style;
p_face = p_run->p_face;
i_font_width = p_style->i_style_flags & STYLE_HALFWIDTH ?
p_style->i_font_size / 2 : p_style->i_font_size;
}
FT_Vector pen_new = {
.x = pen.x + p_paragraph->p_glyph_bitmaps[ i_paragraph_index ].i_x_offset,
.y = pen.y + p_paragraph->p_glyph_bitmaps[ i_paragraph_index ].i_y_offset
};
FT_Vector pen_shadow = {
.x = pen_new.x + p_sys->f_shadow_vector_x * ( i_font_width << 6 ),
.y = pen_new.y + p_sys->f_shadow_vector_y * ( p_style->i_font_size << 6 )
};
if( p_bitmaps->p_shadow )
{
if( FT_Glyph_To_Bitmap( &p_bitmaps->p_shadow, FT_RENDER_MODE_NORMAL,
&pen_shadow, 0 ) )
p_bitmaps->p_shadow = 0;
else
FT_Glyph_Get_CBox( p_bitmaps->p_shadow, ft_glyph_bbox_pixels,
&p_bitmaps->shadow_bbox );
}
if( p_bitmaps->p_glyph )
{
if( FT_Glyph_To_Bitmap( &p_bitmaps->p_glyph, FT_RENDER_MODE_NORMAL,
&pen_new, 1 ) )
{
FT_Done_Glyph( p_bitmaps->p_glyph );
if( p_bitmaps->p_outline )
FT_Done_Glyph( p_bitmaps->p_outline );
if( p_bitmaps->p_shadow )
FT_Done_Glyph( p_bitmaps->p_shadow );
--i_line_index;
continue;
}
else
FT_Glyph_Get_CBox( p_bitmaps->p_glyph, ft_glyph_bbox_pixels,
&p_bitmaps->glyph_bbox );
}
if( p_bitmaps->p_outline )
{
if( FT_Glyph_To_Bitmap( &p_bitmaps->p_outline, FT_RENDER_MODE_NORMAL,
&pen_new, 1 ) )
{
FT_Done_Glyph( p_bitmaps->p_outline );
p_bitmaps->p_outline = 0;
}
else
FT_Glyph_Get_CBox( p_bitmaps->p_outline, ft_glyph_bbox_pixels,
&p_bitmaps->outline_bbox );
}
FixGlyph( p_bitmaps->p_glyph, &p_bitmaps->glyph_bbox,
p_bitmaps->i_x_advance, p_bitmaps->i_y_advance,
&pen_new );
if( p_bitmaps->p_outline )
FixGlyph( p_bitmaps->p_outline, &p_bitmaps->outline_bbox,
p_bitmaps->i_x_advance, p_bitmaps->i_y_advance,
&pen_new );
if( p_bitmaps->p_shadow )
FixGlyph( p_bitmaps->p_shadow, &p_bitmaps->shadow_bbox,
p_bitmaps->i_x_advance, p_bitmaps->i_y_advance,
&pen_shadow );
int i_line_offset = 0;
int i_line_thickness = 0;
text_style_t *p_glyph_style = p_paragraph->pp_styles[ i_paragraph_index ];
if( p_glyph_style->i_style_flags & (STYLE_UNDERLINE | STYLE_STRIKEOUT) )
{
i_line_offset =
abs( FT_FLOOR( FT_MulFix( p_face->underline_position,
p_face->size->metrics.y_scale ) ) );
i_line_thickness =
abs( FT_CEIL( FT_MulFix( p_face->underline_thickness,
p_face->size->metrics.y_scale ) ) );
if( p_glyph_style->i_style_flags & STYLE_STRIKEOUT )
{
/* Move the baseline to make it strikethrough instead of
* underline. That means that strikethrough takes precedence
*/
i_line_offset -=
abs( FT_FLOOR( FT_MulFix( p_face->descender * 2,
p_face->size->metrics.y_scale ) ) );
}
else if( i_line_thickness > 0 )
{
p_bitmaps->glyph_bbox.yMin =
__MIN( p_bitmaps->glyph_bbox.yMin,
- i_line_offset - i_line_thickness );
/* The real underline thickness and position are
* updated once the whole line has been parsed */
i_ul_offset = __MAX( i_ul_offset, i_line_offset );
i_ul_thickness = __MAX( i_ul_thickness, i_line_thickness );
i_line_thickness = -1;
}
}
p_ch->p_glyph = ( FT_BitmapGlyph ) p_bitmaps->p_glyph;
p_ch->p_outline = ( FT_BitmapGlyph ) p_bitmaps->p_outline;
p_ch->p_shadow = ( FT_BitmapGlyph ) p_bitmaps->p_shadow;
bool b_karaoke = p_paragraph->pi_karaoke_bar[ i_paragraph_index ] != 0;
p_ch->i_color = b_karaoke ?
( uint32_t ) p_glyph_style->i_karaoke_background_color
| p_glyph_style->i_karaoke_background_alpha << 24
: ( uint32_t ) p_glyph_style->i_font_color
| p_glyph_style->i_font_alpha << 24;
p_ch->i_line_thickness = i_line_thickness;
p_ch->i_line_offset = i_line_offset;
BBoxEnlarge( &p_line->bbox, &p_bitmaps->glyph_bbox );
if( p_bitmaps->p_outline )
BBoxEnlarge( &p_line->bbox, &p_bitmaps->outline_bbox );
if( p_bitmaps->p_shadow )
BBoxEnlarge( &p_line->bbox, &p_bitmaps->shadow_bbox );
pen.x += p_bitmaps->i_x_advance;
pen.y += p_bitmaps->i_y_advance;
}
p_line->i_width = __MAX( 0, p_line->bbox.xMax - p_line->bbox.xMin );
p_line->i_height = __MAX( 0, p_line->bbox.yMax - p_line->bbox.yMin );
p_line->i_character_count = i_line_index;
if( i_ul_thickness > 0 )
{
for( int i = 0; i < p_line->i_character_count; i++ )
{
line_character_t *ch = &p_line->p_character[i];
if( ch->i_line_thickness < 0 )
{
ch->i_line_offset = i_ul_offset;
ch->i_line_thickness = i_ul_thickness;
}
}
}
*pp_line = p_line;
return VLC_SUCCESS;
}
static int LayoutParagraph( filter_t *p_filter, paragraph_t *p_paragraph,
int i_max_pixel_width, line_desc_t **pp_lines )
{
if( p_paragraph->i_size <= 0 || p_paragraph->i_runs_count <= 0 )
{
msg_Err( p_filter, "LayoutParagraph() invalid parameters. "
"Paragraph size: %d. Runs count %d",
p_paragraph->i_size, p_paragraph->i_runs_count );
return VLC_EGENERIC;
}
int i_line_start = 0;
FT_Pos i_width = 0;
FT_Pos i_max_width = i_max_pixel_width << 6;
FT_Pos i_preferred_width = 0;
FT_Pos i_total_width = 0;
FT_Pos i_last_space_width = 0;
int i_last_space = -1;
line_desc_t *p_first_line = 0;
line_desc_t **pp_line = &p_first_line;
for( int i = 0; i < p_paragraph->i_size; ++i )
{
#ifdef HAVE_FRIBIDI
p_paragraph->pi_reordered_indices[ i ] = i;
#endif
i_total_width += p_paragraph->p_glyph_bitmaps[ i ].i_x_advance;
}
int i_line_count = i_total_width / i_max_width + 1;
i_preferred_width = i_total_width / i_line_count;
for( int i = 0; i <= p_paragraph->i_size; ++i )
{
if( i == p_paragraph->i_size )
{
if( i_line_start < i )
if( LayoutLine( p_filter, p_paragraph,
i_line_start, i, pp_line ) )
goto error;
break;
}
if( p_paragraph->p_code_points[ i ] == ' '
#ifdef HAVE_FRIBIDI
|| p_paragraph->p_types[ i ] == FRIBIDI_TYPE_WS
#endif
)
{
if( i_line_start == i )
{
/*
* Free orphaned white space glyphs not belonging to any lines.
* At this point p_shadow points to either p_glyph or p_outline,
* so we should not free it explicitly.
*/
if( p_paragraph->p_glyph_bitmaps[ i ].p_glyph )
FT_Done_Glyph( p_paragraph->p_glyph_bitmaps[ i ].p_glyph );
if( p_paragraph->p_glyph_bitmaps[ i ].p_outline )
FT_Done_Glyph( p_paragraph->p_glyph_bitmaps[ i ].p_outline );
i_line_start = i + 1;
continue;
}
if( i_last_space == i - 1 )
{
p_paragraph->p_glyph_bitmaps[ i - 1 ].i_x_advance = 0;
i_last_space = i;
continue;
}
i_last_space = i;
i_last_space_width = i_width;
}
i_width += p_paragraph->p_glyph_bitmaps[ i ].i_x_advance;
if( i_last_space_width >= i_preferred_width
|| i_width >= i_max_width )
{
if( i_line_start == i )
{
msg_Err( p_filter,
"LayoutParagraph(): Width of single glyph exceeds maximum" );
goto error;
}
int i_end_offset;
if( i_last_space > i_line_start )
i_end_offset = i_last_space;
else
i_end_offset = i;
if( LayoutLine( p_filter, p_paragraph, i_line_start,
i_end_offset, pp_line ) )
goto error;
pp_line = &( *pp_line )->p_next;
i_line_start = i_end_offset;
i = i_line_start - 1;
i_width = 0;
i_last_space_width = 0;
}
}
*pp_lines = p_first_line;
return VLC_SUCCESS;
error:
for( int i = i_line_start; i < p_paragraph->i_size; ++i )
{
if( p_paragraph->p_glyph_bitmaps[ i ].p_glyph )
FT_Done_Glyph( p_paragraph->p_glyph_bitmaps[ i ].p_glyph );
if( p_paragraph->p_glyph_bitmaps[ i ].p_outline )
FT_Done_Glyph( p_paragraph->p_glyph_bitmaps[ i ].p_outline );
}
if( p_first_line )
FreeLines( p_first_line );
return VLC_EGENERIC;
}
int LayoutText( filter_t *p_filter, line_desc_t **pp_lines,
FT_BBox *p_bbox, int *pi_max_face_height,
uni_char_t *psz_text, text_style_t **pp_styles,
uint32_t *pi_k_dates, int i_len )
{
line_desc_t *p_first_line = 0;
line_desc_t **pp_line = &p_first_line;
paragraph_t *p_paragraph = 0;
int i_paragraph_start = 0;
int i_max_height = 0;
for( int i = 0; i <= i_len; ++i )
{
if( i == i_len || psz_text[ i ] == '\n' )
{
if( i_paragraph_start == i )
{
i_paragraph_start = i + 1;
continue;
}
p_paragraph = NewParagraph( p_filter, i - i_paragraph_start,
psz_text + i_paragraph_start,
pp_styles + i_paragraph_start,
pi_k_dates ?
pi_k_dates + i_paragraph_start : 0,
20 );
if( !p_paragraph )
{
if( p_first_line ) FreeLines( p_first_line );
return VLC_ENOMEM;
}
#ifdef HAVE_FRIBIDI
if( AnalyzeParagraph( p_paragraph ) )
goto error;
#endif
if( ItemizeParagraph( p_filter, p_paragraph ) )
goto error;
#if defined HAVE_HARFBUZZ
if( ShapeParagraphHarfBuzz( p_filter, &p_paragraph ) )
goto error;
if( LoadGlyphs( p_filter, p_paragraph, true, false ) )
goto error;
#elif defined HAVE_FRIBIDI
if( ShapeParagraphFriBidi( p_filter, p_paragraph ) )
goto error;
if( LoadGlyphs( p_filter, p_paragraph, false, true ) )
goto error;
if( RemoveZeroWidthCharacters( p_paragraph ) )
goto error;
if( ZeroNsmAdvance( p_paragraph ) )
goto error;
#else
if( LoadGlyphs( p_filter, p_paragraph, false, true ) )
goto error;
#endif
/*
* Set max line width to allow for outline and shadow glyphs,
* and any extra width caused by visual reordering
*/
int i_max_width = ( int ) p_filter->fmt_out.video.i_visible_width
- 2 * p_filter->p_sys->style.i_font_size;
if( LayoutParagraph( p_filter, p_paragraph,
i_max_width, pp_line ) )
goto error;
FreeParagraph( p_paragraph );
p_paragraph = 0;
for( ; *pp_line; pp_line = &( *pp_line )->p_next )
i_max_height = __MAX( i_max_height, ( *pp_line )->i_height );
i_paragraph_start = i + 1;
}
}
int i_base_line = 0;
FT_BBox bbox = {
.xMin = INT_MAX,
.yMin = INT_MAX,
.xMax = INT_MIN,
.yMax = INT_MIN
};
for( line_desc_t *p_line = p_first_line; p_line; p_line = p_line->p_next )
{
p_line->i_base_line = i_base_line;
p_line->bbox.yMin -= i_base_line;
p_line->bbox.yMax -= i_base_line;
BBoxEnlarge( &bbox, &p_line->bbox );
i_base_line += i_max_height;
}
*pp_lines = p_first_line;
*p_bbox = bbox;
*pi_max_face_height = i_max_height;
return VLC_SUCCESS;
error:
if( p_first_line ) FreeLines( p_first_line );
if( p_paragraph ) FreeParagraph( p_paragraph );
return VLC_EGENERIC;
}
// ----------------------------------------------- texture_font_load_glyphs ---
size_t
texture_font_load_glyphs( texture_font_t * self,
const wchar_t * charcodes )
{
assert( self );
assert( charcodes );
size_t i, x, y, width, height, depth, w, h;
FT_Library library;
FT_Error error;
FT_Face face;
FT_Glyph ft_glyph;
FT_GlyphSlot slot;
FT_Bitmap ft_bitmap;
FT_UInt glyph_index;
texture_glyph_t *glyph;
ivec4 region;
size_t missed = 0;
width = self->atlas->width;
height = self->atlas->height;
depth = self->atlas->depth;
if( !texture_font_load_face( &library, self->filename, self->size, &face ) )
{
return wcslen(charcodes);
}
/* Load each glyph */
for( i=0; i<wcslen(charcodes); ++i )
{
glyph_index = FT_Get_Char_Index( face, charcodes[i] );
// WARNING: We use texture-atlas depth to guess if user wants
// LCD subpixel rendering
FT_Int32 flags = 0;
if( self->outline_type > 0 )
{
flags |= FT_LOAD_NO_BITMAP;
}
else
{
flags |= FT_LOAD_RENDER;
}
if( !self->hinting )
{
flags |= FT_LOAD_NO_HINTING | FT_LOAD_NO_AUTOHINT;
}
else
{
flags |= FT_LOAD_FORCE_AUTOHINT;
}
if( depth == 3 )
{
FT_Library_SetLcdFilter( library, FT_LCD_FILTER_LIGHT );
flags |= FT_LOAD_TARGET_LCD;
if( self->filtering )
{
FT_Library_SetLcdFilterWeights( library, self->lcd_weights );
}
}
error = FT_Load_Glyph( face, glyph_index, flags );
if( error )
{
fprintf( stderr, "FT_Error (line %d, code 0x%02x) : %s\n",
__LINE__, FT_Errors[error].code, FT_Errors[error].message );
FT_Done_FreeType( library );
return wcslen(charcodes)-i;
}
int ft_bitmap_width = 0;
int ft_bitmap_rows = 0;
int ft_bitmap_pitch = 0;
int ft_glyph_top = 0;
int ft_glyph_left = 0;
if( self->outline_type == 0 )
{
slot = face->glyph;
ft_bitmap = slot->bitmap;
ft_bitmap_width = slot->bitmap.width;
ft_bitmap_rows = slot->bitmap.rows;
ft_bitmap_pitch = slot->bitmap.pitch;
ft_glyph_top = slot->bitmap_top;
ft_glyph_left = slot->bitmap_left;
}
else
{
FT_Stroker stroker;
error = FT_Stroker_New( library, &stroker );
if( error )
{
fprintf(stderr, "FT_Error (0x%02x) : %s\n",
FT_Errors[error].code, FT_Errors[error].message);
return 0;
}
FT_Stroker_Set( stroker,
(int)(self->outline_thickness *64),
FT_STROKER_LINECAP_ROUND,
FT_STROKER_LINEJOIN_ROUND,
0);
error = FT_Get_Glyph( face->glyph, &ft_glyph);
if( error )
{
fprintf(stderr, "FT_Error (0x%02x) : %s\n",
FT_Errors[error].code, FT_Errors[error].message);
return 0;
}
if( self->outline_type == 1 )
{
error = FT_Glyph_Stroke( &ft_glyph, stroker, 1 );
}
else if ( self->outline_type == 2 )
{
error = FT_Glyph_StrokeBorder( &ft_glyph, stroker, 0, 1 );
}
else if ( self->outline_type == 3 )
{
error = FT_Glyph_StrokeBorder( &ft_glyph, stroker, 1, 1 );
}
if( error )
{
fprintf(stderr, "FT_Error (0x%02x) : %s\n",
FT_Errors[error].code, FT_Errors[error].message);
return 0;
}
if( depth == 1)
{
error = FT_Glyph_To_Bitmap( &ft_glyph, FT_RENDER_MODE_NORMAL, 0, 1);
if( error )
{
fprintf(stderr, "FT_Error (0x%02x) : %s\n",
FT_Errors[error].code, FT_Errors[error].message);
return 0;
}
}
else
{
error = FT_Glyph_To_Bitmap( &ft_glyph, FT_RENDER_MODE_LCD, 0, 1);
if( error )
{
fprintf(stderr, "FT_Error (0x%02x) : %s\n",
FT_Errors[error].code, FT_Errors[error].message);
return 0;
}
}
FT_BitmapGlyph ft_bitmap_glyph = (FT_BitmapGlyph) ft_glyph;
ft_bitmap = ft_bitmap_glyph->bitmap;
ft_bitmap_width = ft_bitmap.width;
ft_bitmap_rows = ft_bitmap.rows;
ft_bitmap_pitch = ft_bitmap.pitch;
ft_glyph_top = ft_bitmap_glyph->top;
ft_glyph_left = ft_bitmap_glyph->left;
FT_Stroker_Done(stroker);
}
// We want each glyph to be separated by at least one black pixel
// (for example for shader used in demo-subpixel.c)
w = ft_bitmap_width/depth + 1;
h = ft_bitmap_rows + 1;
region = texture_atlas_get_region( self->atlas, w, h );
if ( region.x < 0 )
{
missed++;
fprintf( stderr, "Texture atlas is full (line %d)\n", __LINE__ );
continue;
}
w = w - 1;
h = h - 1;
x = region.x;
y = region.y;
texture_atlas_set_region( self->atlas, x, y, w, h,
ft_bitmap.buffer, ft_bitmap.pitch );
glyph = texture_glyph_new( );
glyph->charcode = charcodes[i];
glyph->width = w;
glyph->height = h;
glyph->outline_type = self->outline_type;
glyph->outline_thickness = self->outline_thickness;
glyph->offset_x = ft_glyph_left;
glyph->offset_y = ft_glyph_top;
glyph->s0 = x/(float)width;
glyph->t0 = y/(float)height;
glyph->s1 = (x + glyph->width)/(float)width;
glyph->t1 = (y + glyph->height)/(float)height;
// Discard hinting to get advance
FT_Load_Glyph( face, glyph_index, FT_LOAD_RENDER | FT_LOAD_NO_HINTING);
slot = face->glyph;
glyph->advance_x = slot->advance.x/64.0;
glyph->advance_y = slot->advance.y/64.0;
vector_push_back( self->glyphs, &glyph );
if( self->outline_type > 0 )
{
FT_Done_Glyph( ft_glyph );
}
}
FT_Done_Face( face );
FT_Done_FreeType( library );
texture_atlas_upload( self->atlas );
texture_font_generate_kerning( self );
return missed;
}
// Load a character glyph
Font::Glyph Font::LoadGlyph( char ch, unsigned int size )
{
Glyph glyph;
// Ensure we can even retrieve the glyph
if ( !_fontFace || !SetCurrentSize( size ) )
{
return glyph;
}
// Attempt to load the font's glyph for the given character
if ( 0 != FT_Load_Char( _myFontFace, ch, FT_LOAD_TARGET_NORMAL | FT_LOAD_FORCE_AUTOHINT ) )
{
return glyph;
}
// Get the glyph's description
FT_Glyph ftGlyph;
if ( 0 != FT_Get_Glyph( _myFontFace->glyph, &ftGlyph ) )
{
return glyph;
}
// Rasterize the glyph
FT_Glyph_To_Bitmap( &ftGlyph, FT_RENDER_MODE_NORMAL, 0, 1 );
FT_Bitmap& bitmap = reinterpret_cast<FT_BitmapGlyph>( ftGlyph )->bitmap;
// Get the glyph's advance
glyph.Advance = static_cast<float>( _myFontFace->glyph->metrics.horiAdvance ) * KerningScale;
int width = bitmap.width;
int height = bitmap.rows;
if ( ( width > 0 ) && ( height > 0 ) )
{
// Get the glyph's page
GlyphPage& page = _pages[ size ];
// Leave a small padding around characters, so that filtering doesn't
// pollute them with pixels from neighbors
const unsigned int padding = 1;
// Find a good position for the new glyph into the texture
UintRect emptyArea = FindGlyphRect( page, width + 2 * padding, height + 2 * padding );;
// Ensure the texture data is in the center of the texture rectangle
emptyArea.X += padding;
emptyArea.Y += padding;
emptyArea.Width -= 2 * padding;
emptyArea.Height -= 2 * padding;
glyph.TextureBounds = emptyArea;
// Set the glyph's bounding box
glyph.Bounds.X = ( _myFontFace->glyph->metrics.horiBearingX ) * KerningScale;
glyph.Bounds.Y = -( _myFontFace->glyph->metrics.horiBearingY ) * KerningScale;
glyph.Bounds.Width = ( _myFontFace->glyph->metrics.width ) * KerningScale;
glyph.Bounds.Height = ( _myFontFace->glyph->metrics.height ) * KerningScale;
// Extract the glyph's pixels from the bitmap
_pixelBuffer.resize( width * height * 4, 255 );
const unsigned char* pixels = bitmap.buffer;
if ( bitmap.pixel_mode == FT_PIXEL_MODE_MONO )
{
// Pixels are 1 bit monochrome values
for ( int y = 0; y < height; ++y )
{
for ( int x = 0; x < width; ++x )
{
// The color channels remain white, just fill the alpha channel
std::size_t index = ( x + y * width ) * 4 + 3;
_pixelBuffer[ index ] = ( ( pixels[ x / 8 ] ) & ( 1 << ( 7 - ( x % 8 ) ) ) ) ? 255 : 0;
}
pixels += bitmap.pitch;
}
}
else
{
// Pixels are 8 bits gray levels
for ( int y = 0; y < height; ++y )
{
for ( int x = 0; x < width; ++x )
{
// The color channels remain white, just fill the alpha channel
std::size_t index = ( x + y * width ) * 4 + 3;
_pixelBuffer[ index ] = pixels[ x ];
}
pixels += bitmap.pitch;
}
}
// Write the pixels to the texture
page.Texture->UpdateArea( emptyArea.X, emptyArea.Y, emptyArea.Width, emptyArea.Height, &_pixelBuffer[ 0 ] );
}
// Cleanup
FT_Done_Glyph( ftGlyph );
return glyph;
}
/** 转换FT_GlyphSlot类型数据为LCUI_FontBMP */
static int Convert_FTGlyph( LCUI_FontBMP *bmp, FT_GlyphSlot slot, int mode )
{
int error;
size_t size;
FT_BitmapGlyph bitmap_glyph;
FT_Glyph glyph;
/* 从字形槽中提取一个字形图像
* 请注意，创建的FT_Glyph对象必须与FT_Done_Glyph成对使用 */
error = FT_Get_Glyph( slot, &glyph );
if(error) {
return -1;
}
/*---------------------- 打印字体信息 --------------------------
printf(" width= %ld, met->height= %ld\n"
"horiBearingX = %ld, horiBearingY = %ld, horiAdvance = %ld\n"
"vertBearingX = %ld, vertBearingY = %ld, vertAdvance = %ld\n",
slot->metrics.width>>6, slot->metrics.height>>6,
slot->metrics.horiBearingX>>6, slot->metrics.horiBearingY>>6,
slot->metrics.horiAdvance>>6, slot->metrics.vertBearingX>>6,
slot->metrics.vertBearingY>>6, slot->metrics.vertAdvance>>6 );
------------------------------------------------------------*/
if ( glyph->format != FT_GLYPH_FORMAT_BITMAP ) {
error = FT_Glyph_To_Bitmap(&glyph, mode, 0 ,1);
if(error) {
return -1;
}
}
bitmap_glyph = (FT_BitmapGlyph)glyph;
/*
* FT_Glyph_Metrics结构体中保存字形度量，通过face->glyph->metrics结
* 构访问，可得到字形的宽、高、左边界距、上边界距、水平跨距等等。
* 注意：因为不是所有的字体都包含垂直度量，当FT_HAS_VERTICAL为假时，
* vertBearingX，vertBearingY和vertAdvance的值是不可靠的，目前暂不考虑
* 此情况的处理。
* */
bmp->top = bitmap_glyph->top;
bmp->left = slot->metrics.horiBearingX>>6;
bmp->rows = bitmap_glyph->bitmap.rows;
bmp->width = bitmap_glyph->bitmap.width;
bmp->advance.x = slot->metrics.horiAdvance>>6; /* 水平跨距 */
bmp->advance.y = slot->metrics.vertAdvance>>6; /* 垂直跨距 */
/* 分配内存，用于保存字体位图 */
size = bmp->rows * bmp->width * sizeof(uchar_t);
bmp->buffer = (uchar_t*)malloc( size );
if( !bmp->buffer ) {
FT_Done_Glyph(glyph);
return -1;
}
switch( bitmap_glyph->bitmap.pixel_mode ) {
/* 8位灰度位图，直接拷贝 */
case FT_PIXEL_MODE_GRAY:
memcpy( bmp->buffer, bitmap_glyph->bitmap.buffer, size );
break;
/* 单色点阵图，需要转换 */
case FT_PIXEL_MODE_MONO: {
FT_Bitmap bitmap;
FT_Library lib;
FT_Int x, y;
uchar_t *t, *s;
lib = FontLIB_GetLibrary();
FT_Bitmap_New( &bitmap );
/* 转换位图bitmap_glyph->bitmap至bitmap，1个像素占1个字节 */
FT_Bitmap_Convert( lib, &bitmap_glyph->bitmap, &bitmap, 1);
s = bitmap.buffer;
t = bmp->buffer;
for( y=0; y<bmp->rows; ++y ) {
for( x=0; x<bmp->width; ++x ) {
*t = *s?255:0;
++t,++s;
}
}
FT_Bitmap_Done( lib, &bitmap );
break;
}
/* 其它像素模式的位图，暂时先直接填充255，等需要时再完善 */
default:
memset( bmp->buffer, 255, size );
break;
}
FT_Done_Glyph(glyph);
return size;
}
int main(int argc, char *argv[]) {
int i, j, err, size, first=' ', last='~',
bitmapOffset = 0, x, y, byte;
char *fontName, c, *ptr;
FT_Library library;
FT_Face face;
FT_Glyph glyph;
FT_Bitmap *bitmap;
FT_BitmapGlyphRec *g;
GFXglyph *table;
uint8_t bit;
// Parse command line. Valid syntaxes are:
// fontconvert [filename] [size]
// fontconvert [filename] [size] [last char]
// fontconvert [filename] [size] [first char] [last char]
// Unless overridden, default first and last chars are
// ' ' (space) and '~', respectively
if(argc < 3) {
fprintf(stderr, "Usage: %s fontfile size [first] [last]\n",
argv[0]);
return 1;
}
size = atoi(argv[2]);
if(argc == 4) {
last = atoi(argv[3]);
} else if(argc == 5) {
first = atoi(argv[3]);
last = atoi(argv[4]);
}
if(last < first) {
i = first;
first = last;
last = i;
}
ptr = strrchr(argv[1], '/'); // Find last slash in filename
if(ptr) ptr++; // First character of filename (path stripped)
else ptr = argv[1]; // No path; font in local dir.
// Allocate space for font name and glyph table
if((!(fontName = malloc(strlen(ptr) + 20))) ||
(!(table = (GFXglyph *)malloc((last - first + 1) *
sizeof(GFXglyph))))) {
fprintf(stderr, "Malloc error\n");
return 1;
}
// Derive font table names from filename. Period (filename
// extension) is truncated and replaced with the font size & bits.
strcpy(fontName, ptr);
ptr = strrchr(fontName, '.'); // Find last period (file ext)
if(!ptr) ptr = &fontName[strlen(fontName)]; // If none, append
// Insert font size and 7/8 bit. fontName was alloc'd w/extra
// space to allow this, we're not sprintfing into Forbidden Zone.
sprintf(ptr, "%dpt%db", size, (last > 127) ? 8 : 7);
// Space and punctuation chars in name replaced w/ underscores.
for(i=0; (c=fontName[i]); i++) {
if(isspace(c) || ispunct(c)) fontName[i] = '_';
}
// Init FreeType lib, load font
if((err = FT_Init_FreeType(&library))) {
fprintf(stderr, "FreeType init error: %d", err);
return err;
}
if((err = FT_New_Face(library, argv[1], 0, &face))) {
fprintf(stderr, "Font load error: %d", err);
FT_Done_FreeType(library);
return err;
}
// << 6 because '26dot6' fixed-point format
FT_Set_Char_Size(face, size << 6, 0, DPI, 0);
// Currently all symbols from 'first' to 'last' are processed.
// Fonts may contain WAY more glyphs than that, but this code
// will need to handle encoding stuff to deal with extracting
// the right symbols, and that's not done yet.
// fprintf(stderr, "%ld glyphs\n", face->num_glyphs);
printf("package Giza.Bitmap_Fonts.%s is\n\n", fontName);
printf(" %sBitmaps : aliased constant Font_Bitmap := (\n ",
fontName);
// Process glyphs and output huge bitmap data array
for(i=first, j=0; i<=last; i++, j++) {
// MONO renderer provides clean image with perfect crop
// (no wasted pixels) via bitmap struct.
if((err = FT_Load_Char(face, i, FT_LOAD_TARGET_MONO))) {
fprintf(stderr, "Error %d loading char '%c'\n",
err, i);
continue;
}
if((err = FT_Render_Glyph(face->glyph,
FT_RENDER_MODE_MONO))) {
fprintf(stderr, "Error %d rendering char '%c'\n",
err, i);
continue;
}
if((err = FT_Get_Glyph(face->glyph, &glyph))) {
fprintf(stderr, "Error %d getting glyph '%c'\n",
err, i);
continue;
}
bitmap = &face->glyph->bitmap;
g = (FT_BitmapGlyphRec *)glyph;
// Minimal font and per-glyph information is stored to
// reduce flash space requirements. Glyph bitmaps are
// fully bit-packed; no per-scanline pad, though end of
// each character may be padded to next byte boundary
// when needed. 16-bit offset means 64K max for bitmaps,
// code currently doesn't check for overflow. (Doesn't
// check that size & offsets are within bounds either for
// that matter...please convert fonts responsibly.)
table[j].bitmapOffset = bitmapOffset;
table[j].width = bitmap->width;
table[j].height = bitmap->rows;
table[j].xAdvance = face->glyph->advance.x >> 6;
table[j].xOffset = g->left;
table[j].yOffset = 1 - g->top;
for(y=0; y < bitmap->rows; y++) {
for(x=0;x < bitmap->width; x++) {
byte = x / 8;
bit = 0x80 >> (x & 7);
enbit(bitmap->buffer[
y * bitmap->pitch + byte] & bit);
}
}
// Pad end of char bitmap to next byte boundary if needed
int n = (bitmap->width * bitmap->rows) & 7;
if(n) { // Pixel count not an even multiple of 8?
n = 8 - n; // # bits to next multiple
while(n--) enbit(0);
}
bitmapOffset += (bitmap->width * bitmap->rows + 7) / 8;
FT_Done_Glyph(glyph);
}
printf(");\n\n"); // End bitmap array
// Output glyph attributes table (one per character)
printf(" %sGlyphs : aliased constant Glyph_Array := (\n",
fontName);
for(i=first, j=0; i<=last; i++, j++) {
printf(" (%d, %d, %d, %d, %d, %d)",
table[j].bitmapOffset,
table[j].width,
table[j].height,
table[j].xAdvance,
table[j].xOffset,
table[j].yOffset);
if(i < last) {
printf(", -- 0x%02X", i);
if((i >= ' ') && (i <= '~')) {
printf(" '%c'", i);
}
putchar('\n');
}
}
printf("); -- 0x%02X", last);
if((last >= ' ') && (last <= '~')) printf(" '%c'", last);
printf("\n\n");
// Output font structure
printf(" Font : Bitmap_Font :=\n");
printf(" (%sBitmaps'Access,\n", fontName);
printf(" %sGlyphs'Access,\n", fontName);
printf(" 16#%02X#,\n", first);
printf(" 16#%02X#,\n", last);
printf(" %ld);\n", face->size->metrics.height >> 6);
printf("end Giza.Bitmap_Fonts.%s;\n", fontName);
FT_Done_FreeType(library);
return 0;
}
Shape2D FontEngine_Freetype::load_glyph_outline(int c, int &out_advance_x)
{
out_advance_x = 0;
FT_UInt glyph_index;
glyph_index = FT_Get_Char_Index( face, FT_ULong(c) );
FT_Error error = FT_Load_Glyph( face, glyph_index, FT_LOAD_DEFAULT );
if ( error )
{
throw Exception("freetype: error loading glyph");
}
FT_Glyph glyph;
error = FT_Get_Glyph( face->glyph, &glyph );
if ( error )
{
throw Exception("freetype: error getting glyph");
}
FT_OutlineGlyph ft_outline_glyph_rec = (FT_OutlineGlyph)glyph;
FT_Outline ft_outline = ft_outline_glyph_rec->outline;
Shape2D outline;
// cl_write_console_line(string_format("Num contours: %1", ft_outline.n_contours));
for( int cont = 0; cont < ft_outline.n_contours; cont++ )
{
// cl_write_console_line(string_format("Num points in contour %1: %2", cont, ft_outline.contours[0]+1));
Path2D contour;
// debug: dump contents of points array to terminal
// for( int i = 0; i <= ft_outline.contours[cont]; ++i )
// {
// FT_Vector pos = ft_outline.points[i];
// cl_write_console_line(string_format("dump points[%1]: (%2,%3) \t type: %4", i, pos.x, pos.y, ft_outline.tags[i]));
// }
std::vector<TaggedPoint> points = get_contour_points(cont, &ft_outline);
points.push_back(points.front()); // just to simplify, it's removed later.
for( unsigned int i = 0; i < points.size()-1; i++ )
{
TaggedPoint &tp = points[i];
if( tp.tag == FT_Curve_Tag_On )
{
contour.add_line_to(tp.pos);
}
else if( tp.tag == FT_Curve_Tag_Conic )
{
// TODO: i - 1 is safe here because we made sure the contour will start with a Tag_On.
BezierCurve curve;
curve.add_control_point( points[i-1].pos);
curve.add_control_point( tp.pos );
curve.add_control_point( points[i+1].pos );
contour.add_curve(curve);
}
else if( tp.tag == FT_Curve_Tag_Cubic && points[i-1].tag == FT_Curve_Tag_Cubic )
{
BezierCurve curve;
curve.add_control_point( points[i-2].pos);
curve.add_control_point( points[i-1].pos);
curve.add_control_point( tp.pos );
curve.add_control_point( points[i+1].pos );
contour.add_curve(curve);
}
}
outline.add_path(contour);
}
FT_Done_Glyph(glyph);
out_advance_x = get_advance_x( c );
return outline;
}
int text_to_overlay(p_info_rec* p_info, overlay* ovly, char* text,
int max_width, char* font, const int size,
const int aspect_ratio_num,
const int aspect_ratio_den)
{
info_rec* info;
BYTE* srcLine;
BYTE* dstLine;
int j;
int error;
int result;
// initialise our data
if (*p_info == NULL)
{
result = allocate_info(p_info);
if (result < 0)
return result;
}
info = *p_info;
result = set_font(info, font, size, aspect_ratio_num, aspect_ratio_den);
if (result < 0)
return result;
// render text using freetype2
{
#define MAX_GLYPHS 100
FT_GlyphSlot slot = info->face->glyph; /* a small shortcut */
FT_UInt glyph_idx;
FT_UInt last_glyph;
FT_Vector delta;
FT_Bool use_kerning;
int pen_x, pen_y, n, margin;
FT_Glyph glyphs[MAX_GLYPHS]; /* glyph image */
FT_Vector pos [MAX_GLYPHS]; /* glyph position */
FT_UInt num_glyphs;
int vis_last; // index of end of last "word"
int vis_width; // width to vis_last
use_kerning = FT_HAS_KERNING(info->face);
// font metrics are unreliable, so use actual rendered characters
// set left margin using a capital M character
glyph_idx = FT_Get_Char_Index(info->face, 'M');
FT_Load_Glyph(info->face, glyph_idx, FT_LOAD_DEFAULT);
FT_Get_Glyph(info->face->glyph, &glyphs[0]);
pen_x = slot->metrics.horiBearingX;
margin = pen_x;
FT_Done_Glyph(glyphs[0]);
// set baseline using a capital A character
glyph_idx = FT_Get_Char_Index(info->face, 'A');
FT_Load_Glyph(info->face, glyph_idx, FT_LOAD_DEFAULT);
FT_Get_Glyph(info->face->glyph, &glyphs[0]);
pen_y = slot->metrics.horiBearingY;
FT_Done_Glyph(glyphs[0]);
// convert each character to a glyph and set its position
num_glyphs = 0;
vis_last = -1;
vis_width = 0;
last_glyph = FT_Get_Char_Index(info->face, ' ');
for (n = 0; n < (int)strlen(text); n++)
{
if (text[n] == '\n')
break;
if (num_glyphs >= MAX_GLYPHS)
break;
glyph_idx = FT_Get_Char_Index(info->face, text[n]);
if (use_kerning && last_glyph && glyph_idx)
{
FT_Get_Kerning(info->face, last_glyph, glyph_idx,
FT_KERNING_DEFAULT, &delta);
pen_x += delta.x;
}
error = FT_Load_Glyph(info->face, glyph_idx, FT_LOAD_DEFAULT);
if (error)
continue; /* ignore errors */
error = FT_Get_Glyph(info->face->glyph, &glyphs[num_glyphs]);
if (error)
continue; /* ignore errors */
if (pen_y - slot->metrics.horiBearingY < 0)
{
fprintf(stderr, "Character '%c' ascends too high\n", text[n]);
pen_y = slot->metrics.horiBearingY;
}
if (pen_y - slot->metrics.horiBearingY +
slot->metrics.height > size * 64)
{
fprintf(stderr, "Character '%c' descends too low\n", text[n]);
exit(1);
}
pos[num_glyphs].x = pen_x;
pos[num_glyphs].y = -pen_y;
pen_x += slot->advance.x;
last_glyph = glyph_idx;
num_glyphs++;
if (pen_x + (margin * 2) > max_width * 64)
break;
if (text[n] != ' ' &&
(text[n+1] == ' ' || text[n+1] == '\0' || text[n+1] == '\n'))
{
vis_last = n;
vis_width = pen_x;
}
}
// truncate string to end of last word
if (vis_last < 0) // haven't found end of first word!
{
vis_last = num_glyphs - 1;
vis_width = pen_x;
}
num_glyphs = vis_last + 1;
// find start of next word
result = num_glyphs;
while (text[result] == ' ' || text[result] == '\n')
result++;
// set overlay dimensions
ovly->w = (vis_width + (margin * 2)) / 64;
ovly->h = size;
// fprintf(stderr, "Area of '%s' = (%d x %d)\n", text, ovly->w, ovly->h);
ovly->ssx = -1;
ovly->ssy = -1;
// alloc memory
ovly->buff = malloc(ovly->w * ovly->h * 2);
if (ovly->buff == NULL)
return YUV_no_memory;
memset(ovly->buff, 0, ovly->w * ovly->h * 2);
ovly->Cbuff = NULL;
// render glyphs in pre-calculated positions
for (n = 0; n < (int)num_glyphs; n++)
{
error = FT_Glyph_To_Bitmap(&glyphs[n], FT_RENDER_MODE_NORMAL,
&pos[n], 1);
if (!error)
{
FT_BitmapGlyph bit = (FT_BitmapGlyph)glyphs[n];
srcLine = bit->bitmap.buffer;
dstLine = ovly->buff - (bit->top * ovly->w) + bit->left;
for (j = 0; j < bit->bitmap.rows; j++)
{
memcpy(dstLine, srcLine, bit->bitmap.width);
srcLine += bit->bitmap.width;
dstLine += ovly->w;
}
}
FT_Done_Glyph(glyphs[n]);
}
}
return result; // length of string actually rendered
}
/*
* Renders a glyph immediately, then tries to puts it into cache.
* rend and rend->face must be not 0
*/
static GLYPH* _gk_rend_workout(GLYPH_REND* const rend,const unsigned unicode)
{
unsigned glyph_index;
int bmp_size;
int error;
int center_x = 0,center_y = 0;
FT_Glyph ft_glyph = 0;
GLYPH* glyph;
GLYPH_FACE* actual_face;
unsigned actual_code;
#ifdef GLYPH_LOG
if (glyph_log) fprintf(glyph_log,"_gk_rend_workout(%p,%d) begin\n",(void*)rend,unicode);
#endif
CARE(rend && rend->face);
CARE(unicode > 0);
CARE(unicode <= GK_MAX_UNICODE);
funcname = "_gk_rend_workout()";
_gk_find_mapping(rend->face,unicode,&actual_face,&actual_code);
if (!actual_face || !actual_code) return 0;
if (!actual_face->face) return 0;
glyph_index = FT_Get_Char_Index(actual_face->face,actual_code);
if (!glyph_index)
{
if (unicode==rend->undefined_char || unicode==rend->error_char) return 0;
else return _gk_rend_render(rend,rend->undefined_char);
}
#ifdef GLYPH_LOG
if (glyph_log) fprintf(glyph_log," glyph_index is %u\n",glyph_index);
#endif
/* Preparing for glyph loading: setting size */
/*FT_Activate_Size(size);*/
if (actual_face == rend->face)
{
error = (rend->size == 0);
if (!error) actual_face->face->size = rend->size;
}
else
{
error = (actual_face->own_size == 0);
if (!error)
{
actual_face->face->size = actual_face->own_size;
error = FT_Set_Char_Size(actual_face->face,rend->hsize,rend->vsize,72,72);
}
}
#ifdef GLYPH_LOG
if (error)
{
if (glyph_log) fprintf(glyph_log," Failed to select size\n");
}
else
{
if (glyph_log) fprintf(glyph_log," Size selected successfully\n");
}
#endif
/* Loading a glyph with FreeType */
if (!error)
{
error = FT_Load_Glyph(actual_face->face,glyph_index,rend->load_flags);
if (error)
_gk_msg("Error: %s: FT_Load_Glyph() bugs on glyph (#%d) for character U+%04X\n",funcname,glyph_index,unicode);
else
{
error = (actual_face->face->glyph == 0);
if (error) _gk_msg("Error: %s: Empty glyph slot after FT_Load_Glyph()\n",funcname);
}
/*#ifdef GLYPH_LOG
if (error)
{
if (glyph_log) fprintf(glyph_log," Could not load a glyph with FT_Load_Glyph()\n");
}
else
{
if (glyph_log) fprintf(glyph_log," Loaded a glyph with FT_Load_Glyph()\n");
}
#endif*/
}
/* Getting center coordinates (MEGA-HACK) */
/* This whole idea should be re-made in more optimal way */
if (!error)
{
/*#ifdef GLYPH_LOG
if (glyph_log) fprintf(glyph_log," Getting a center point\n");
#endif*/
FT_Glyph g = 0;
error = FT_Get_Glyph(actual_face->face->glyph, &g);
/*#ifdef GLYPH_LOG
if (glyph_log)
{
if (error)
fprintf(glyph_log," FT_Get_Glyph() failed\n");
else
fprintf(glyph_log," FT_Get_Glyph() succeeded\n");
if (g)
fprintf(glyph_log," FT_Get_Glyph() returned not 0\n");
else
fprintf(glyph_log," FT_Get_Glyph() returned 0\n");
}
#endif*/
error = error || !g;
if (!error && g->format==FT_GLYPH_FORMAT_OUTLINE)
{
/*#ifdef GLYPH_LOG
if (glyph_log) fprintf(glyph_log," Calling FT_Glyph_To_Bitmap()\n");
#endif*/
error = FT_Glyph_To_Bitmap(&g,rend->render_mode,0,1);
/*#ifdef GLYPH_LOG
if (glyph_log)
{
if (error)
fprintf(glyph_log," FT_Glyph_To_Bitmap() failed\n");
else
fprintf(glyph_log," FT_Glyph_To_Bitmap() succeeded\n");
}
#endif*/
if (!error)
{
center_x = 64 * ((FT_BitmapGlyph)g)->left + 64 * ((FT_BitmapGlyph)g)->bitmap.width / 2;
center_y = 64 * ((FT_BitmapGlyph)g)->top - 64 * ((FT_BitmapGlyph)g)->bitmap.rows / 2;
/*center_x = 64 * ((FT_BitmapGlyph)g)->bitmap.width / 2;
center_y = -64 * ((FT_BitmapGlyph)g)->bitmap.rows / 2;*/
}
}
if (g)
{
/*#ifdef GLYPH_LOG
if (glyph_log) fprintf(glyph_log," Calling FT_Done_Glyph()\n");
#endif*/
FT_Done_Glyph(g);
}
/*#ifdef GLYPH_LOG
if (glyph_log)
{
if (error)
fprintf(glyph_log," Could not find a center point\n");
else
fprintf(glyph_log," Computed a center point\n");
}
#endif*/
}
/* Emboldening the glyph */
if (!error)
{
if (rend->bold_strength && actual_face->face->glyph->format==FT_GLYPH_FORMAT_OUTLINE)
{
int xstr, ystr, xstr2, ystr2;
int xmin,xmax,ymin,ymax;
int center_dx, center_dy;
FT_GlyphSlot slot = actual_face->face->glyph;
#ifdef GLYPH_LOG
if (glyph_log) fprintf(glyph_log," Emboldening the glyph by %d\n",rend->bold_strength);
#endif
xstr = rend->bold_strength *
FT_MulFix( actual_face->face->units_per_EM, actual_face->face->size->metrics.y_scale ) / 2400;
ystr = xstr;
#ifdef GLYPH_LOG
if (glyph_log) fprintf(glyph_log," xstr = %d, ystr = %d\n",xstr,ystr);
#endif
GK_Outline_Embolden(&slot->outline,xstr,&xmin,&xmax,&ymin,&ymax);
#ifdef GLYPH_LOG
if (glyph_log) fprintf(glyph_log," xmin = %d, xmax = %d\n",xmin,xmax);
if (glyph_log) fprintf(glyph_log," ymin = %d, ymax = %d\n",ymin,ymax);
#endif
/*xstr = xstr * 2;
ystr = xstr;*/
#ifdef GLYPH_LOG
if (glyph_log) fprintf(glyph_log," xstr = %d, ystr = %d\n",xstr,ystr);
#endif
xstr2 = xmin+xmax;
ystr2 = ymin+ymax;
#ifdef GLYPH_LOG
if (glyph_log) fprintf(glyph_log," xstr2 = %d, ystr2 = %d\n",xstr2,ystr2);
if (glyph_log) fprintf(glyph_log," xscale = %.5f\n",((double)actual_face->face->size->metrics.x_scale)/65536);
if (glyph_log) fprintf(glyph_log," yscale = %.5f\n",((double)actual_face->face->size->metrics.y_scale)/65536);
#endif
if (slot->advance.x) slot->advance.x += xstr;
if (slot->advance.y) slot->advance.y += ystr;
slot->metrics.width += xstr * 2;
slot->metrics.height += ystr * 2;
/*slot->metrics.horiBearingX -= xmin;*/
slot->metrics.horiBearingY += ystr * 2;
slot->metrics.horiAdvance += xstr * 2;
slot->metrics.vertBearingX -= xstr;
slot->metrics.vertBearingY += ystr * 2;
slot->metrics.vertAdvance += ystr * 2;
/*center_dx = (int)( (double)xstr / 2 * (double)actual_face->face->size->metrics.x_scale / (80000) );
center_dy = (int)( (double)ystr / 2 * (double)actual_face->face->size->metrics.y_scale / (65536) );*/
center_dx = (int)( (double)rend->bold_strength * (double)actual_face->face->size->metrics.x_ppem / 80);
center_dy = (int)( (double)rend->bold_strength * (double)actual_face->face->size->metrics.y_ppem / 80);
#ifdef GLYPH_LOG
if (glyph_log) fprintf(glyph_log," center_x += %.1f\n",((double)center_dx)/64);
if (glyph_log) fprintf(glyph_log," center_y += %.1f\n",((double)center_dx)/64);
#endif
center_x += center_dx;
center_y += center_dy;
/*center_x += xstr;*/
/*center_y += ymin;*/
/*FT_GlyphSlot_Embolden(slot);*/
}
}
/* Getting a glyph from FreeType */
if (!error)
{
error = FT_Get_Glyph(actual_face->face->glyph, &ft_glyph);
error = error || !ft_glyph;
if (error)
_gk_msg("Error: %s: Can't get a glyph with FT_Get_Glyph() call. Glyph (#%d) for character U+%04X\n",
funcname,glyph_index,unicode);
}
/* Transforming the glyph to apply rotation and italics */
if (!error && ft_glyph->format==FT_GLYPH_FORMAT_OUTLINE && rend->do_matrix_transform)
{
error = FT_Glyph_Transform(ft_glyph,&rend->matrix,0);
if (!error)
{
FT_Vector c;
c.x = center_x;
c.y = center_y;
FT_Vector_Transform(&c,&rend->matrix);
center_x = c.x;
center_y = c.y;
}
}
/* Converting glyph to bitmap */
if (!error && ft_glyph->format==FT_GLYPH_FORMAT_OUTLINE)
{
error = FT_Glyph_To_Bitmap(&ft_glyph,rend->render_mode,0,1);
if (error) _gk_msg("Error: %s: FT_Glyph_To_Bitmap() bugs on character U+%04X\n",funcname,unicode);
}
/* Checking if we have bitmap now */
if (!error)
{
error = (ft_glyph->format!=FT_GLYPH_FORMAT_BITMAP);
if (error) _gk_msg("Error: %s: Glyph is not FT_GLYPH_FORMAT_BITMAP after rendering with FT_Glyph_To_Bitmap()\n",funcname);
}
#ifdef GLYPH_LOG
/* {
if (glyph_log)
{
fprintf(glyph_log," We got a bitmap glyph from FreeType!\n");
if (ft_glyph->format==FT_GLYPH_FORMAT_BITMAP)
{
fprintf(glyph_log," Format: FT_GLYPH_FORMAT_BITMAP\n");
fprintf(glyph_log," Size: %dx%d, pitch: %d\n",
((FT_BitmapGlyph)ft_glyph)->bitmap.width,
((FT_BitmapGlyph)ft_glyph)->bitmap.rows,
((FT_BitmapGlyph)ft_glyph)->bitmap.pitch);
if (((FT_BitmapGlyph)ft_glyph)->bitmap.pixel_mode==FT_PIXEL_MODE_MONO)
{
int x,y;
int pitch = ((FT_BitmapGlyph)ft_glyph)->bitmap.pitch;
fprintf(glyph_log," Pixel mode: FT_PIXEL_MODE_MONO\n");
fprintf(glyph_log," Buffer:\n");
for (y=0; y < ((FT_BitmapGlyph)ft_glyph)->bitmap.rows; y++)
{
fprintf(glyph_log," ");
for (x=0; x < ((FT_BitmapGlyph)ft_glyph)->bitmap.width; x++)
{
unsigned char byte = ((unsigned char*)((FT_BitmapGlyph)ft_glyph)->bitmap.buffer)[y*pitch+x];
unsigned char mask = 128 >> (x%8);
fprintf(glyph_log,"%s",(byte&mask)?" *":" .");
}
fprintf(glyph_log,"\n");
}
}
else if (((FT_BitmapGlyph)ft_glyph)->bitmap.pixel_mode==FT_PIXEL_MODE_GRAY)
fprintf(glyph_log," Pixel mode: FT_PIXEL_MODE_GRAY\n");
else if (((FT_BitmapGlyph)ft_glyph)->bitmap.pixel_mode==FT_PIXEL_MODE_GRAY2)
fprintf(glyph_log," Pixel mode: FT_PIXEL_MODE_GRAY2\n");
else if (((FT_BitmapGlyph)ft_glyph)->bitmap.pixel_mode==FT_PIXEL_MODE_GRAY4)
fprintf(glyph_log," Pixel mode: FT_PIXEL_MODE_GRAY4\n");
else if (((FT_BitmapGlyph)ft_glyph)->bitmap.pixel_mode==FT_PIXEL_MODE_LCD)
fprintf(glyph_log," Pixel mode: FT_PIXEL_MODE_LCD\n");
else if (((FT_BitmapGlyph)ft_glyph)->bitmap.pixel_mode==FT_PIXEL_MODE_LCD_V)
fprintf(glyph_log," Pixel mode: FT_PIXEL_MODE_LCD_V\n");
}
else if (ft_glyph->format==FT_GLYPH_FORMAT_OUTLINE)
{
fprintf(glyph_log," Format: FT_GLYPH_FORMAT_OUTLINE\n");
}
fprintf(glyph_log," Advance: ( %.1f , %.1f ) pixels\n",
((double)ft_glyph->advance.x)/0x10000,((double)ft_glyph->advance.y)/0x10000);
}
}*/
#endif
if (!error)
{
error = ( ((FT_BitmapGlyph)ft_glyph)->bitmap.pitch < 0 );
if (error) _gk_msg("Error: rend_workout(): Rendered glyph has negative pitch value, can't handle\n"); /* FIXME */
}
if (!error)
{
glyph = (GLYPH*)_gk_malloc(sizeof(GLYPH));
error = (glyph == 0);
}
if (error || !ft_glyph)
{
if (ft_glyph) FT_Done_Glyph(ft_glyph);
if (unicode==rend->error_char) return 0;
else return _gk_rend_render(rend,rend->error_char);
}
glyph->unicode = unicode;
glyph->width = ((FT_BitmapGlyph)ft_glyph)->bitmap.width;
glyph->height = ((FT_BitmapGlyph)ft_glyph)->bitmap.rows;
glyph->left = ((FT_BitmapGlyph)ft_glyph)->left;
glyph->top = ((FT_BitmapGlyph)ft_glyph)->top;
glyph->advance_x = ft_glyph->advance.x >> 10;
glyph->advance_y = ft_glyph->advance.y >> 10;
glyph->center_x = (center_x + 31) / 64;
glyph->center_y = (center_y + 31) / 64;
glyph->index = 0;
glyph->prev = 0;
glyph->next = 0;
glyph->bmp = 0;
glyph->bmpsize = 0;
_gk_msg("rendering character '%c'\n",unicode);
bmp_size = glyph->width*glyph->height;
if (!bmp_size) /* empty glyph, like space (' ') character */
{
if (rend->index) _gk_glyph_index_add_glyph(rend->index,glyph);
FT_Done_Glyph(ft_glyph);
return glyph;
}
if (((FT_BitmapGlyph)ft_glyph)->bitmap.pixel_mode == FT_PIXEL_MODE_MONO)
{
#ifdef GLYPH_TARGET_KNOWS_MONO_BITPACK
int pitch1 = (glyph->width+7)>>3;
int bitpack_size = glyph->height*pitch1;
#ifdef GLYPH_TARGET_KNOWS_MONO_RLE7
int rle_size = 0;
if (rend->index)
rle_size = _gk_make_RLE7( ((FT_BitmapGlyph)ft_glyph)->bitmap.buffer,
glyph->width, glyph->height, ((FT_BitmapGlyph)ft_glyph)->bitmap.pitch);
if (rle_size>0 && rle_size<=bitpack_size)
{
glyph->bmp = (unsigned char*)_gk_malloc(rle_size);
if (!glyph->bmp) { _gk_free(glyph); return 0; }
memcpy(glyph->bmp,rle_buffer,rle_size);
glyph->bmpsize = rle_size;
}
else
#endif /* GLYPH_TARGET_KNOWS_MONO_RLE7 */
{
glyph->bmp = (unsigned char*)_gk_malloc(bitpack_size+1);
if (!glyph->bmp) { _gk_free(glyph); return 0; }
glyph->bmp[0] = GLYPH_MONO_BITPACK;
if ( ((FT_BitmapGlyph)ft_glyph)->bitmap.pitch == pitch1 )
memcpy( glyph->bmp+1, ((FT_BitmapGlyph)ft_glyph)->bitmap.buffer, bitpack_size );
else
{
unsigned char *d = glyph->bmp+1;
int y = 0;
for (; y<glyph->height; y++,d+=pitch1)
memcpy( d, ((FT_BitmapGlyph)ft_glyph)->bitmap.buffer + y * ((FT_BitmapGlyph)ft_glyph)->bitmap.pitch, pitch1 );
}
glyph->bmpsize = bitpack_size+1;
}
#else /* GLYPH_TARGET_KNOWS_MONO_BITPACK */
{
int y = 0;
unsigned char* b;
glyph->bmp = (unsigned char*)_gk_malloc(bmp_size+1);
if (!glyph->bmp) { _gk_free(glyph); return 0; }
glyph->bmp[0] = GLYPH_UNCOMPRESSED;
glyph->bmpsize = bmp_size+1;
b = glyph->bmp + 1;
for (; y<glyph->height; y++)
{
int x = 0;
unsigned char* a = ((FT_BitmapGlyph)ft_glyph)->bitmap.buffer + y * ((FT_BitmapGlyph)ft_glyph)->bitmap.pitch;
while (x<glyph->width)
{
if (x < glyph->width) { *b++ = *a&0x80 ? 255 : 0; x++; }
if (x < glyph->width) { *b++ = *a&0x40 ? 255 : 0; x++; }
if (x < glyph->width) { *b++ = *a&0x20 ? 255 : 0; x++; }
if (x < glyph->width) { *b++ = *a&0x10 ? 255 : 0; x++; }
if (x < glyph->width) { *b++ = *a&0x08 ? 255 : 0; x++; }
if (x < glyph->width) { *b++ = *a&0x04 ? 255 : 0; x++; }
if (x < glyph->width) { *b++ = *a&0x02 ? 255 : 0; x++; }
if (x < glyph->width) { *b++ = *a&0x01 ? 255 : 0; x++; }
a++;
}
}
}
#endif /* GLYPH_TARGET_KNOWS_MONO_BITPACK */
}
static FT_Error Load_Glyph( TTF_Font* font, Uint16 ch, c_glyph* cached, int want )
{
FT_Face face;
FT_Error error;
FT_GlyphSlot glyph;
FT_Glyph_Metrics* metrics;
FT_Outline* outline;
if ( !font || !font->face ) {
return FT_Err_Invalid_Handle;
}
face = font->face;
/* Load the glyph */
if ( ! cached->index ) {
cached->index = FT_Get_Char_Index( face, ch );
}
error = FT_Load_Glyph( face, cached->index, FT_LOAD_DEFAULT | font->hinting);
if( error ) {
return error;
}
/* Get our glyph shortcuts */
glyph = face->glyph;
metrics = &glyph->metrics;
outline = &glyph->outline;
/* Get the glyph metrics if desired */
if ( (want & CACHED_METRICS) && !(cached->stored & CACHED_METRICS) ) {
if ( FT_IS_SCALABLE( face ) ) {
/* Get the bounding box */
cached->minx = FT_FLOOR(metrics->horiBearingX);
cached->maxx = cached->minx + FT_CEIL(metrics->width);
cached->maxy = FT_FLOOR(metrics->horiBearingY);
cached->miny = cached->maxy - FT_CEIL(metrics->height);
cached->yoffset = font->ascent - cached->maxy;
cached->advance = FT_CEIL(metrics->horiAdvance);
} else {
/* Get the bounding box for non-scalable format.
* Again, freetype2 fills in many of the font metrics
* with the value of 0, so some of the values we
* need must be calculated differently with certain
* assumptions about non-scalable formats.
* */
cached->minx = FT_FLOOR(metrics->horiBearingX);
cached->maxx = cached->minx + FT_CEIL(metrics->horiAdvance);
cached->maxy = FT_FLOOR(metrics->horiBearingY);
cached->miny = cached->maxy - FT_CEIL(face->available_sizes[font->font_size_family].height);
cached->yoffset = 0;
cached->advance = FT_CEIL(metrics->horiAdvance);
}
/* Adjust for bold and italic text */
if( TTF_HANDLE_STYLE_BOLD(font) ) {
cached->maxx += font->glyph_overhang;
}
if( TTF_HANDLE_STYLE_ITALIC(font) ) {
cached->maxx += (int)ceil(font->glyph_italics);
}
cached->stored |= CACHED_METRICS;
}
if ( ((want & CACHED_BITMAP) && !(cached->stored & CACHED_BITMAP)) ||
((want & CACHED_PIXMAP) && !(cached->stored & CACHED_PIXMAP)) ) {
int mono = (want & CACHED_BITMAP);
int i;
FT_Bitmap* src;
FT_Bitmap* dst;
FT_Glyph bitmap_glyph = NULL;
/* Handle the italic style */
if( TTF_HANDLE_STYLE_ITALIC(font) ) {
FT_Matrix shear;
shear.xx = 1 << 16;
shear.xy = (int) ( font->glyph_italics * ( 1 << 16 ) ) / font->height;
shear.yx = 0;
shear.yy = 1 << 16;
FT_Outline_Transform( outline, &shear );
}
/* Render as outline */
if( (font->outline > 0) && glyph->format != FT_GLYPH_FORMAT_BITMAP ) {
FT_Stroker stroker;
FT_Get_Glyph( glyph, &bitmap_glyph );
error = FT_Stroker_New( library, &stroker );
if( error ) {
return error;
}
FT_Stroker_Set( stroker, font->outline * 64, FT_STROKER_LINECAP_ROUND, FT_STROKER_LINEJOIN_ROUND, 0 );
FT_Glyph_Stroke( &bitmap_glyph, stroker, 1 /* delete the original glyph */ );
FT_Stroker_Done( stroker );
/* Render the glyph */
error = FT_Glyph_To_Bitmap( &bitmap_glyph, mono ? ft_render_mode_mono : ft_render_mode_normal, 0, 1 );
if( error ) {
FT_Done_Glyph( bitmap_glyph );
return error;
}
src = &((FT_BitmapGlyph)bitmap_glyph)->bitmap;
} else {
/* Render the glyph */
error = FT_Render_Glyph( glyph, mono ? ft_render_mode_mono : ft_render_mode_normal );
if( error ) {
return error;
}
src = &glyph->bitmap;
}
/* Copy over information to cache */
if ( mono ) {
dst = &cached->bitmap;
} else {
dst = &cached->pixmap;
}
memcpy( dst, src, sizeof( *dst ) );
/* FT_Render_Glyph() and .fon fonts always generate a
* two-color (black and white) glyphslot surface, even
* when rendered in ft_render_mode_normal. */
/* FT_IS_SCALABLE() means that the font is in outline format,
* but does not imply that outline is rendered as 8-bit
* grayscale, because embedded bitmap/graymap is preferred
* (see FT_LOAD_DEFAULT section of FreeType2 API Reference).
* FT_Render_Glyph() canreturn two-color bitmap or 4/16/256-
* color graymap according to the format of embedded bitmap/
* graymap. */
if ( src->pixel_mode == FT_PIXEL_MODE_MONO ) {
dst->pitch *= 8;
} else if ( src->pixel_mode == FT_PIXEL_MODE_GRAY2 ) {
dst->pitch *= 4;
} else if ( src->pixel_mode == FT_PIXEL_MODE_GRAY4 ) {
dst->pitch *= 2;
}
/* Adjust for bold and italic text */
if( TTF_HANDLE_STYLE_BOLD(font) ) {
int bump = font->glyph_overhang;
dst->pitch += bump;
dst->width += bump;
}
if( TTF_HANDLE_STYLE_ITALIC(font) ) {
int bump = (int)ceil(font->glyph_italics);
dst->pitch += bump;
dst->width += bump;
}
if (dst->rows != 0) {
dst->buffer = (unsigned char *)malloc( dst->pitch * dst->rows );
if( !dst->buffer ) {
return FT_Err_Out_Of_Memory;
}
memset( dst->buffer, 0, dst->pitch * dst->rows );
for( i = 0; i < src->rows; i++ ) {
int soffset = i * src->pitch;
int doffset = i * dst->pitch;
if ( mono ) {
unsigned char *srcp = src->buffer + soffset;
unsigned char *dstp = dst->buffer + doffset;
int j;
if ( src->pixel_mode == FT_PIXEL_MODE_MONO ) {
for ( j = 0; j < src->width; j += 8 ) {
unsigned char c = *srcp++;
*dstp++ = (c&0x80) >> 7;
c <<= 1;
*dstp++ = (c&0x80) >> 7;
c <<= 1;
*dstp++ = (c&0x80) >> 7;
c <<= 1;
*dstp++ = (c&0x80) >> 7;
c <<= 1;
*dstp++ = (c&0x80) >> 7;
c <<= 1;
*dstp++ = (c&0x80) >> 7;
c <<= 1;
*dstp++ = (c&0x80) >> 7;
c <<= 1;
*dstp++ = (c&0x80) >> 7;
}
} else if ( src->pixel_mode == FT_PIXEL_MODE_GRAY2 ) {
for ( j = 0; j < src->width; j += 4 ) {
unsigned char c = *srcp++;
*dstp++ = (((c&0xA0) >> 6) >= 0x2) ? 1 : 0;
c <<= 2;
*dstp++ = (((c&0xA0) >> 6) >= 0x2) ? 1 : 0;
c <<= 2;
*dstp++ = (((c&0xA0) >> 6) >= 0x2) ? 1 : 0;
c <<= 2;
*dstp++ = (((c&0xA0) >> 6) >= 0x2) ? 1 : 0;
}
} else if ( src->pixel_mode == FT_PIXEL_MODE_GRAY4 ) {
for ( j = 0; j < src->width; j += 2 ) {
unsigned char c = *srcp++;
*dstp++ = (((c&0xF0) >> 4) >= 0x8) ? 1 : 0;
c <<= 4;
*dstp++ = (((c&0xF0) >> 4) >= 0x8) ? 1 : 0;
}
} else {
for ( j = 0; j < src->width; j++ ) {
Glyph::Glyph(FT_Library &library, FontFace &fontFace, int c, int outlineWidth, bool hinting) :
mFont(fontFace)
{
mChar = c;
FT_Face &face = fontFace.GetFTFace();
int flags = FT_LOAD_DEFAULT;
if (!hinting)
{
flags = FT_LOAD_NO_AUTOHINT | FT_LOAD_NO_HINTING;
}
FT_Error error = FT_Load_Char(face, c, flags);
if (error) {
return;
}
mGlyphIndex = FT_Get_Char_Index(face, c);
// Load The Glyph For Our Character.
if(FT_Load_Glyph( face, mGlyphIndex, flags ))
throw std::runtime_error("FT_Load_Glyph failed");
// Move The Face's Glyph Into A Glyph Object.
FT_Glyph glyph;
if(FT_Get_Glyph( face->glyph, &glyph ))
throw std::runtime_error("FT_Get_Glyph failed");
FT_Stroker stroker;
FT_Stroker_New(library, &stroker);
FT_Stroker_Set(stroker, outlineWidth * 64, FT_STROKER_LINECAP_ROUND, FT_STROKER_LINEJOIN_ROUND, 0);
FT_Glyph_StrokeBorder(&glyph, stroker, false, true);
FT_OutlineGlyph olglyph = reinterpret_cast<FT_OutlineGlyph>(glyph);
FT_Outline outline = olglyph->outline;
RenderSpans(library, &outline);
FT_Stroker_Done(stroker);
// Get metrics
FT_Glyph_Metrics metrics = face->glyph->metrics;
mAdvance.x = metrics.horiAdvance * kOneOver64;
mAdvance.y = metrics.vertAdvance * kOneOver64;
mBearing.x = metrics.horiBearingX * kOneOver64;
mBearing.y = metrics.horiBearingY * kOneOver64;
mSize.x = glm::round(metrics.width * kOneOver64);
mSize.y = glm::round(metrics.height * kOneOver64);
// Adjust for outline?
mAdvance.x += outlineWidth;
// Draw spans
if(mSpans.size() > 0)
{
GlyphSpan front = mSpans.front();
Rect bounds(front.x, front.y, front.x, front.y);
for(int i = 0; i < mSpans.size(); i++)
{
bounds.Include(mSpans[i].x, mSpans[i].y + 1);
bounds.Include(mSpans[i].x + mSpans[i].width, mSpans[i].y);
}
int width = bounds.GetWidth();
int height = bounds.GetHeight();
mDataSize.x = width;
mDataSize.y = height;
int size = width * height;
mBuffer = new unsigned char[size];
memset(mBuffer, 0, size);
for(int i = 0; i < mSpans.size(); i++)
{
GlyphSpan &span = mSpans[i];
for (int w = 0; w < span.width; ++w)
{
mBuffer[(int)((height - 1 - (span.y - bounds.top)) * width
+ span.x - bounds.left + w)] = span.coverage;
}
}
}
FT_Done_Glyph(glyph);
}
JNIEXPORT jobject JNICALL
Java_gnu_java_awt_peer_gtk_FreetypeGlyphVector_getGlyphOutlineNative
(JNIEnv *env, jobject obj __attribute__((unused)), jint glyphIndex, jlong fnt)
{
generalpath *path;
jobject gp;
FT_Outline_Funcs ftCallbacks =
{
(FT_Outline_MoveToFunc) _moveTo,
(FT_Outline_LineToFunc) _lineTo,
(FT_Outline_ConicToFunc) _quadTo,
(FT_Outline_CubicToFunc) _curveTo,
0,
0
};
PangoFcFont *font;
FT_Face ft_face;
FT_Glyph glyph;
font = JLONG_TO_PTR(PangoFcFont, fnt);
ft_face = pango_fc_font_lock_face( font );
g_assert (ft_face != NULL);
path = g_malloc0 (sizeof (generalpath));
g_assert(path != NULL);
path->env = env;
path->px = path->py = 0.0;
path->sx = 1.0/64.0;
path->sy = -1.0/64.0;
{ /* create a GeneralPath instance */
jclass cls;
jmethodID method;
cls = (*env)->FindClass (env, "java/awt/geom/GeneralPath");
method = (*env)->GetMethodID (env, cls, "<init>", "()V");
gp = path->obj = (*env)->NewObject (env, cls, method);
}
if(FT_Load_Glyph(ft_face,
(FT_UInt)(glyphIndex),
FT_LOAD_DEFAULT | FT_LOAD_NO_BITMAP) != 0)
{
pango_fc_font_unlock_face( font );
g_free(path);
return NULL;
}
FT_Get_Glyph( ft_face->glyph, &glyph );
if (glyph->format == FT_GLYPH_FORMAT_OUTLINE)
{
FT_Outline_Decompose (&(((FT_OutlineGlyph)glyph)->outline),
&ftCallbacks, path);
}
else
{
char format[5];
format[0] = (glyph->format & 0xFF000000) >> 24;
format[1] = (glyph->format & 0x00FF0000) >> 16;
format[2] = (glyph->format & 0x0000FF00) >> 8;
format[3] = (glyph->format & 0x000000FF);
format[4] = '\0';
printf("WARNING: Unable to create outline for font %s %s of format %s\n",
ft_face->family_name, ft_face->style_name, format);
}
FT_Done_Glyph( glyph );
pango_fc_font_unlock_face( font );
g_free(path);
return gp;
}
/*
TODO: Font rendering MUST be redesigned.
*/
Font* GuiRendererD3D11::MakeFont(const char* pPath, int height)
{
Common::Timer timer;
timer.Start();
FT_Face face;
int texWidth = 4096;
int texHeight = 4096;
//create pixels array
unsigned char* pTexData = (unsigned char*)malloc(texWidth * texHeight);
ZeroMemory(pTexData, texWidth * texHeight);
if (FT_New_Face(mFreeTypeLibrary, pPath, 0, &face) != 0)
{
free(pTexData);
// TODO
// LOG_ERROR("Failed to load font '%s'.", pPath);
return 0;
}
//FT_Set_Pixel_Sizes(face, 2*height, 2*height);
FT_Set_Char_Size(face, 0, height * 64, 96, 96);
Font* pFont = new Font;
/*
FT_Matrix Transform;
Transform.xx = (FT_Fixed)(1.0f * 0x10000L);
Transform.xy = (FT_Fixed)(0.0f * 0x10000L);
Transform.yx = (FT_Fixed)(0.0f * 0x10000L);
Transform.yy = (FT_Fixed)(1.0f * 0x10000L);
FT_Set_Transform(face, &Transform, 0);
*/
int Width;
int Height;
int OffsetX = 0;
int OffsetY = 0;
pFont->height = height;
pFont->charCount = 65536;
pFont->characters = (CharacterInfo*)malloc(sizeof(CharacterInfo) * pFont->charCount);
int Index = 0;
for (int ChrId = 0; ChrId < (65536); ChrId++)
{
// Load The Glyph For Our Character.
unsigned int GlyphIndex = FT_Get_Char_Index(face, ChrId);
if (GlyphIndex == 0)
{
pFont->characters[ChrId].exists = false;
continue;
}
FT_Load_Glyph(face, GlyphIndex, FT_LOAD_DEFAULT);
// Move The Face's Glyph Into A Glyph Object.
FT_Glyph glyph;
FT_Get_Glyph(face->glyph, &glyph);
// Convert The Glyph To A Bitmap.
FT_Glyph_To_Bitmap(&glyph, FT_RENDER_MODE_NORMAL, 0, 1);
FT_BitmapGlyph bitmap_glyph = (FT_BitmapGlyph)glyph;
// This Reference Will Make Accessing The Bitmap Easier.
FT_Bitmap& bitmap = bitmap_glyph->bitmap;
Width = bitmap.width;
Height = bitmap.rows;
//char won't fit to texture
if (OffsetX + Width + 2 > texWidth)
{
OffsetX = 0;
OffsetY += 2 * height;
}
for (int y = 0; y < Height; y++)
{
for (int x = 0; x < Width; x++)
{
unsigned char Value = bitmap.buffer[x + Width * y];
int PxOffset = (y + OffsetY) * texWidth + x + OffsetX;
pTexData[PxOffset] = Value;
}
}
pFont->characters[ChrId].exists = true;
pFont->characters[ChrId].top = (short)bitmap_glyph->top;
pFont->characters[ChrId].left = (short)bitmap_glyph->left;
pFont->characters[ChrId].height = (short)Height;
pFont->characters[ChrId].width = (short)Width;
pFont->characters[ChrId].u = (short)OffsetX;
pFont->characters[ChrId].v = (short)OffsetY;
pFont->characters[ChrId].spacing = (short)(face->glyph->advance.x >> 6) + 1;
FT_Done_Glyph(glyph);
OffsetX += pFont->characters[ChrId].width + 1;
Index++;
}
//close font
FT_Done_Face(face);
OffsetY += 2 * height; // Used texture height
texHeight = CeilToPowerOf2(OffsetY);
Common::Image fontImage;
fontImage.SetData(pTexData, texWidth, texHeight, Common::ImageFormat::A_UBYTE);
// pFont->texture = pRenderer->CreateTexture(&fontImage, false);
pFont->texture = new RendererTextureD3D11;
pFont->texture->FromImage(fontImage);
pFont->texHeight = texHeight;
pFont->texWidth = texWidth;
free(pTexData);
// TODO
// LOG_SUCCESS("Font '%s', size %i loaded in %.3lf seconds.", pPath, height, timer.Stop());
return pFont;
}
bool TrueTypeFont::bakeGlyphDistance(CodePoint _codePoint, GlyphInfo& _glyphInfo, uint8_t* _outBuffer)
{
BX_CHECK(m_font != NULL, "TrueTypeFont not initialized");
_glyphInfo.glyphIndex = FT_Get_Char_Index(m_font->face, _codePoint);
FT_Int32 loadMode = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING;
FT_Render_Mode renderMode = FT_RENDER_MODE_NORMAL;
FT_GlyphSlot slot = m_font->face->glyph;
FT_Error error = FT_Load_Glyph(m_font->face, _glyphInfo.glyphIndex, loadMode);
if (error)
{
return false;
}
FT_Glyph glyph;
error = FT_Get_Glyph(slot, &glyph);
if (error)
{
return false;
}
error = FT_Glyph_To_Bitmap(&glyph, renderMode, 0, 1);
if (error)
{
return false;
}
FT_BitmapGlyph bitmap = (FT_BitmapGlyph)glyph;
int32_t ww = bitmap->bitmap.width;
int32_t hh = bitmap->bitmap.rows;
glyphInfoInit(_glyphInfo, bitmap, slot, _outBuffer, 1);
FT_Done_Glyph(glyph);
if (ww * hh > 0)
{
uint32_t dw = 6;
uint32_t dh = 6;
uint32_t nw = ww + dw * 2;
uint32_t nh = hh + dh * 2;
BX_CHECK(nw * nh < 128 * 128, "Buffer overflow (size %d)", nw * nh);
uint32_t buffSize = nw * nh * sizeof(uint8_t);
uint8_t* alphaImg = (uint8_t*)malloc(buffSize);
memset(alphaImg, 0, nw * nh * sizeof(uint8_t) );
//copy the original buffer to the temp one
for (uint32_t ii = dh; ii < nh - dh; ++ii)
{
memcpy(alphaImg + ii * nw + dw, _outBuffer + (ii - dh) * ww, ww);
}
makeDistanceMap(alphaImg, _outBuffer, nw, nh);
free(alphaImg);
_glyphInfo.offset_x -= (float)dw;
_glyphInfo.offset_y -= (float)dh;
_glyphInfo.width = (float)nw;
_glyphInfo.height = (float)nh;
}
return true;
}
/*
* Function : libaroma_font_glyph_draw
* Return Value: byte
* Descriptions: draw glyph into canvas
*/
byte libaroma_font_glyph_draw(
LIBAROMA_CANVASP dest,
LIBAROMA_GLYPH aglyph_param,
int x,
int y,
word color,
byte flags,
byte opacity
) {
_LIBAROMA_FONT_SLOT_CACHEP aglyph =
(_LIBAROMA_FONT_SLOT_CACHEP) aglyph_param;
if (!aglyph) {
return 0;
}
if (aglyph->glyph==NULL) {
return 0;
}
if (dest == NULL) {
dest = libaroma_fb()->canvas;
}
/* thread safe lock */
_libaroma_font_lock(1);
/* copy & render */
FT_Glyph fglyph=NULL;
fglyph=NULL;
int cnt=0;
if (FT_Glyph_Copy(aglyph->glyph, &fglyph)!=0){
_libaroma_font_lock(0);
return 0;
}
if (cnt>0){
printf("[FT] FC: %i %i\n",cnt,aglyph->codepoint);
}
/* italic transform */
if (flags & _LIBAROMA_TEXTCHUNK_ITALIC) {
FT_Matrix matrix;
matrix.xx = 0x10000L;
matrix.xy = 0x5000L;
matrix.yx = 0;
matrix.yy = 0x10000L;
FT_Glyph_Transform(fglyph, &matrix, NULL);
}
/* embolden */
if (flags & _LIBAROMA_TEXTCHUNK_BOLD) {
FT_Outline_Embolden(
&((FT_OutlineGlyph) fglyph)->outline,
aglyph->size * 2
);
}
/* convert glyph to bitmap glyph */
if (FT_Glyph_To_Bitmap(&fglyph, _LIBAROMA_FONT_RENDER_FLAG, 0, 1)!=0){
/* release glyph */
printf("[FT] FR:%i\n",aglyph->codepoint);
FT_Done_Glyph(fglyph);
_libaroma_font_lock(0);
return 0;
}
/* as bitmap glyph */
FT_BitmapGlyph bit = (FT_BitmapGlyph) fglyph;
/* prepare locations */
/*int yy;*/
typeof(bit->bitmap.rows) yy;
int xpos = x + bit->left;
int xstart = 0;
if (xpos < 0) {
xstart = 0 - xpos;
xpos = 0;
}
/* loop */
#ifndef LIBAROMA_CONFIG_NOFONT_SUBPIXEL
int draw_w = (bit->bitmap.width / 3) - xstart;
if (draw_w + xpos > dest->w) {
draw_w = dest->w - xpos;
}
if (draw_w > 0) {
wordp tmp_dst = NULL;
if (opacity != 0xff) {
tmp_dst = (wordp) malloc(draw_w * 2);
}
for (yy = 0; yy < bit->bitmap.rows; yy++) {
/* drawing positions */
int yglp = (yy - bit->top);
int ypos = (y + yglp) * dest->l;
/* check position */
if ((ypos+draw_w>(dest->l*dest->h)) || (ypos<0)) {
continue;
}
/* source * destination pointers */
int ysrc = yy * bit->bitmap.pitch;
bytep src_line = bit->bitmap.buffer + ysrc + (xstart * 3);
wordp dest_line = dest->data + ypos + xpos;
/* draw line */
if (opacity == 0xff) {
libaroma_alpha_multi_line(
draw_w, dest_line, dest_line, color, src_line);
}
else {
libaroma_alpha_multi_line(
draw_w, tmp_dst, dest_line, color, src_line);
libaroma_alpha_const(
draw_w, dest_line, dest_line, tmp_dst, opacity);
}
}
if (tmp_dst) {
free(tmp_dst);
}
}
#else
int draw_w = bit->bitmap.width - xstart;
if (draw_w + xpos > dest->w) {
draw_w = dest->w - xpos;
}
if (draw_w > 0) {
wordp tmp_dst = NULL;
if (opacity != 0xff) {
tmp_dst = (wordp) malloc(draw_w * 2);
}
/* line */
for (yy = 0; yy < bit->bitmap.rows; yy++) {
/* drawing positions */
int yglp = (yy - bit->top);
int ypos = (y + yglp) * dest->l;
/* check position */
if ((ypos+draw_w>(dest->l*dest->h)) || (ypos<0)) {
continue;
}
/* source & destination pointers */
int ysrc = yy * bit->bitmap.pitch;
bytep src_line = bit->bitmap.buffer + ysrc + xstart;
wordp dest_line = dest->data + ypos + xpos;
/* draw line */
if (opacity == 0xff) {
libaroma_alpha_mono(
draw_w, dest_line, dest_line, color, src_line);
}
else {
libaroma_alpha_mono(
draw_w, tmp_dst, dest_line, color, src_line);
libaroma_alpha_const(
draw_w, dest_line, dest_line, tmp_dst, opacity);
}
}
if (tmp_dst) {
free(tmp_dst);
}
}
#endif
/* release glyph */
FT_Done_Glyph(fglyph);
_libaroma_font_lock(0);
return 1;
} /* End of libaroma_font_glyph_draw */
