bool Font::GenerateGlyph( unsigned int glyphNumber, GlyphBitmap &glyphBitmap)
{
if(FT_Load_Glyph( face, FT_Get_Char_Index( face, glyphNumber ), FT_LOAD_DEFAULT ))
{
return false;
}
FT_Glyph glyph;
if(FT_Get_Glyph( face->glyph, &glyph ))
{
return false;
}
FT_Glyph_To_Bitmap( &glyph, ft_render_mode_normal, 0, 1 );
FT_BitmapGlyph bitmap_glyph = (FT_BitmapGlyph)glyph;
FT_Bitmap &bitmap=bitmap_glyph->bitmap;
glyphBitmap.bitmap->Generate(Bitmap::FORMAT_RGBA, bitmap.width, bitmap.rows, 0x00000000);
unsigned int channelCount = GetChannelCount(Bitmap::FORMAT_RGBA);
byte *glyphImageData = glyphBitmap.bitmap->GetData();
for(int j = 0; j < bitmap.rows; j++)
{
for(int i=0; i < bitmap.width; i++)
{
glyphImageData[( bitmap.width * j + i ) * channelCount + channelCount - 1]
= bitmap.buffer[bitmap.width * ( bitmap.rows - j - 1) + i];
}
}
glyphBitmap.offsetDown = bitmap_glyph->top - bitmap.rows;
glyphBitmap.bitmap->BlackToWhite();
return true;
}
ImageHandle FreeTypeFont::createGlyphImage(int codepoint, int fontSize) const
{
int glyph_index = FT_Get_Char_Index( fontInfo->face, codepoint );
int error = FT_Set_Pixel_Sizes(
fontInfo->face, /* handle to face object */
0, /* pixel_width */
fontSize ); /* pixel_height */
if ( error )
LogError("Error setting font size");
error = FT_Load_Glyph( fontInfo->face, glyph_index, FT_LOAD_RENDER | FT_LOAD_TARGET_LCD);
if ( error )
LogError("Error loading glyph");
FT_Glyph glyph; /* a handle to the glyph image */
error = FT_Get_Glyph( fontInfo->face->glyph, &glyph );
if ( error )
LogError("Error getting glyph");
FT_Vector origin;
origin.x = origin.y = 0;
error = FT_Glyph_To_Bitmap(
&glyph,
FT_RENDER_MODE_LCD,
&origin,
1 );
FT_Bitmap bitmap = ((FT_BitmapGlyph) glyph)->bitmap;
if (bitmap.width == 0 || bitmap.rows == 0)
return HandleInvalid;
auto image = ImageCreate(AllocatorGetHeap(), bitmap.width/3, bitmap.rows, PixelFormat::R8G8B8);
image.Resolve()->setBuffer(bitmap.buffer, bitmap.pitch);
return image;
}
FT_BitmapGlyphRec* CFontEngine::RenderGlyph(char Char)
{
auto glyphIter = m_CachedGlyphMap.find(Char);
if (glyphIter == m_CachedGlyphMap.end())
{
if (FT_Load_Char(m_FontFace, Char, FT_LOAD_DEFAULT))
{
throw(Wg_Ex_FreeType("Unable to render glyph.", "CFontEngine::RenderGlyph"));
}
FT_Glyph glyph;
if (FT_Get_Glyph(m_FontFace->glyph, &glyph))
{
throw(Wg_Ex_FreeType("Unable to copy glyph.", "CFontEngine::RenderGlyph"));
}
if (FT_Glyph_To_Bitmap(&glyph, ft_render_mode_normal, nullptr, 1))
{
throw(Wg_Ex_FreeType("Unable to render glyph.", "CFontEngine::RenderGlyph"));
}
glyphIter = m_CachedGlyphMap.insert(std::make_pair(Char, *reinterpret_cast<FT_BitmapGlyph>(glyph))).first;
}
return &(glyphIter->second);
}
void grid_text_renderer<T>::render(glyph_positions const& pos, value_integer feature_id)
{
glyphs_.clear();
prepare_glyphs(pos);
FT_Error error;
FT_Vector start;
unsigned 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.x += transform_.tx * 64;
start.y += transform_.ty * 64;
// now render transformed glyphs
double halo_radius = 0.0;
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;
for (auto & glyph : glyphs_)
{
halo_radius = glyph.properties.halo_radius * scale_factor_;
FT_Glyph_Transform(glyph.image, &halo_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);
render_halo_id(&bit->bitmap,
feature_id,
bit->left,
height - bit->top,
static_cast<int>(halo_radius));
}
FT_Done_Glyph(glyph.image);
}
}
void FontPrintImageTtf_short(ge_Font* font, int x, int y, const unsigned short* text, u32 color, ge_Image* image){
FT_GlyphSlot slot = ((FT_Face)font->face)->glyph;
int b_x = x;
int n = 0;
long ch = 0;
for (n = 0; text[n] != 0x0; n++) {
// gePrintDebug(0x100, "char: %d\n", n);
ch = (u16)text[n];
if(ch == '\n'){
y += font->size;
x = b_x;
continue;
}
if(ch >= 0x80){
TransformUnicodeChar(&ch);
}
FT_UInt glyph_index = FT_Get_Char_Index(((FT_Face)font->face), ch);
FT_Load_Glyph(((FT_Face)font->face), glyph_index, FT_LOAD_DEFAULT);
FT_Glyph glyph;
FT_Get_Glyph(((FT_Face)font->face)->glyph, &glyph);
FT_Glyph_To_Bitmap(&glyph, ft_render_mode_normal, 0, 1);
slot = ((FT_Face)font->face)->glyph;
FT_BitmapGlyph bitmap_glyph = (FT_BitmapGlyph)glyph;
FT_Bitmap bitmap = bitmap_glyph->bitmap;
fontPrintTextImage(&bitmap, x+bitmap_glyph->left, y+font->size-bitmap_glyph->top, color, image);
x += slot->advance.x >> 6;
}
geUpdateImage(image);
}
static void freetype2_drawtext(PFont pfont, image_p pimage, int x, int y,
const void *text, int cc, int flags)
{
PFontFreetype pf = (PFontFreetype) pfont;
uint16_t* value;
FT_Glyph glyph;
int pen_x = x;
int pen_y = y + pf->size;
int i;
FT_BitmapGlyph bitmap_glyph;
FT_Bitmap* bitmap;
value = _nge_ft_conv_encoding(pfont, text, &cc);
if (cc <= 0)
return;
if(pimage->swizzle ==1){
unswizzle_swap(pimage);
pimage->dontswizzle = 1;
}
pimage->modified =1;
for (i =0;i<cc;i++) {
FT_Load_Glyph( pf->face, FT_Get_Char_Index( pf->face, value[i] ), FT_LOAD_DEFAULT );
if(pf->flags & FLAGS_FREETYPE_BOLD)
FT_GlyphSlot_Embolden(pf->face->glyph);
if(pf->flags & FLAGS_FREETYPE_ITALICS)
FT_GlyphSlot_Oblique(pf->face->glyph);
FT_Get_Glyph( pf->face->glyph, &glyph );
FT_Render_Glyph( pf->face->glyph, ft_render_mode_normal );
FT_Glyph_To_Bitmap( &glyph, ft_render_mode_normal, 0, 1 );
bitmap_glyph = (FT_BitmapGlyph)glyph;
bitmap=&bitmap_glyph->bitmap;
draw_one_word(pf,bitmap,pimage,pen_x + pf->face->glyph->bitmap_left,pen_y - pf->face->glyph->bitmap_top );
pen_x +=(pf->face->glyph->advance.x+pf->fix_width*72) >> 6 ;
FT_Done_Glyph( glyph );
}
}
static void ft2_draw_glyphs(GalDrawable drawable, GalPB pb, GalFont obj,
GalRect *area, eint x, eint y, GalGlyph *glyphs, eint len)
{
Ft2Font *ft2font = FT2_FONT_DATA(obj);
GalImage *image = ft2font->image;
FT_Face face = ft2_get_face(ft2font);
FT_BitmapGlyph bitmap_glyph;
FT_Bitmap *bitmap;
eint i, w = 0;
egal_fill_image(image, 0, area->x, 0, area->w, image->h);
for (i = 0; i < len; i++) {
FT_Glyph glyph;
FT_Load_Glyph(face, glyphs[i].glyph, FT_LOAD_DEFAULT);
FT_Get_Glyph(face->glyph, &glyph);
if (face->glyph->format != ft_glyph_format_bitmap)
FT_Render_Glyph(face->glyph, ft_render_mode_normal);
FT_Glyph_To_Bitmap(&glyph, FT_RENDER_MODE_NORMAL, 0, 1);
bitmap_glyph = (FT_BitmapGlyph)glyph;
bitmap = &bitmap_glyph->bitmap;
ft2_bitmap_to_image(bitmap, image,
x + w + face->glyph->bitmap_left,
ft2font->metrics.height - face->glyph->bitmap_top + ft2font->metrics.descent);
w += glyphs[i].w;
}
{
GalRect rc = {x, y, w, ft2font->metrics.height};
egal_rect_intersect(&rc, &rc, area);
eint _y = rc.y - y;
egal_composite_image(drawable, pb, rc.x, rc.y, image, rc.x, _y, rc.w, rc.h - _y);
//egal_draw_image(drawable, pb, rc.x, rc.y, image, rc.x, _y, rc.w, rc.h - _y);
}
}
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;
}
int eTextPara::appendGlyph(Font *current_font, FT_Face current_face, FT_UInt glyphIndex, int flags, int rflags, int border, bool last,
bool activate_newcolor, unsigned long newcolor)
{
int xadvance, top, left, width, height;
pGlyph ng;
if (border)
{
/* TODO: scale border radius with current_font scaling */
if (current_font->getGlyphImage(glyphIndex, &ng.image, &ng.borderimage, 64 * border))
return 1;
if (ng.image && ng.image->format != FT_GLYPH_FORMAT_BITMAP)
{
FT_Glyph_To_Bitmap(&ng.image, FT_RENDER_MODE_NORMAL, NULL, 1);
if (ng.image->format != FT_GLYPH_FORMAT_BITMAP) return 1;
}
if (ng.borderimage && ng.borderimage->format != FT_GLYPH_FORMAT_BITMAP)
{
FT_Glyph_To_Bitmap(&ng.borderimage, FT_RENDER_MODE_NORMAL, NULL, 1);
if (ng.borderimage->format != FT_GLYPH_FORMAT_BITMAP) return 1;
}
FT_BitmapGlyph glyph = NULL;
if (ng.borderimage)
{
xadvance = ng.borderimage->advance.x;
/*
* NOTE: our boundingbox calculation uses xadvance, and ignores glyph width.
* This is fine for all glyphs, except the last one (i.e. rightmost, for left-to-right rendering)
* For border glyphs, xadvance is significantly smaller than the glyph width.
* In fact, border glyphs often have the same xadvance as normal glyphs, borders
* are allowed to overlap.
* As a result, the boundingbox is calculated too small, the actual glyphs won't
* fit into it, and depending on the alignment, one of the borders on the sides
* will be cut off.
* Ideally, the boundingbox calculation should be rewritten, to use both advance and glyph dimensions.
* However, for now we adjust xadvance of the last glyph, so the current calculation will produce
* a better fitting boundingbox for border glyphs.
*
* The compensation equals half of the difference between 'normal' glyph width,
* and border glyph width. (half the width difference is on the left, and half on the right
* of the glyph, we only need to compensate for the part on the right)
* And since xadvance is in 16.16 units, we use (dW/2) << 16 = dW << 15
*/
if (last) xadvance += (((FT_BitmapGlyph)ng.borderimage)->bitmap.width - ((FT_BitmapGlyph)ng.image)->bitmap.width) << 15;
glyph = (FT_BitmapGlyph)ng.borderimage;
}
else if (ng.image)
{
xadvance = ng.image->advance.x;
glyph = (FT_BitmapGlyph)ng.image;
}
else
{
return 1;
}
xadvance >>= 16;
top = glyph->top;
left = glyph->left;
width = glyph->bitmap.width;
height = glyph->bitmap.rows;
}
else
{
///Create a display list coresponding to the give character.
void make_dlist ( FT_Face face, char ch, GLuint list_base, GLuint * tex_base ) {
//The first thing we do is get FreeType to render our character
//into a bitmap. This actually requires a couple of FreeType commands:
//Load the Glyph for our character.
if(FT_Load_Glyph( face, FT_Get_Char_Index( face, ch ), FT_LOAD_DEFAULT ))
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");
//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;
//Use our helper function to get the widths of
//the bitmap data that we will need in order to create
//our texture.
int width = next_p2( bitmap.width );
int height = next_p2( bitmap.rows );
//Allocate memory for the texture data.
GLubyte* expanded_data = new GLubyte[ 2 * width * height];
//Here we fill in the data for the expanded bitmap.
//Notice that we are using two channel bitmap (one for
//luminocity and one for alpha), but we assign
//both luminocity and alpha to the value that we
//find in the FreeType bitmap.
//We use the ?: operator so that value which we use
//will be 0 if we are in the padding zone, and whatever
//is the the Freetype bitmap otherwise.
for(int j=0; j <height; j++) {
for(int i=0; i < width; i++) {
expanded_data[2*(i+j*width)]= expanded_data[2*(i+j*width)+1] =
(i>=bitmap.width || j>=bitmap.rows) ?
0 : bitmap.buffer[i + bitmap.width*j];
}
}
//Now we just setup some texture paramaters.
glBindTexture( GL_TEXTURE_2D, tex_base[ch]);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
//Here we actually create the texture itself, notice
//that we are using GL_LUMINANCE_ALPHA to indicate that
//we are using 2 channel data.
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, width, height,
0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, expanded_data );
//With the texture created, we don't need to expanded data anymore
delete [] expanded_data;
//So now we can create the display list
glNewList(list_base+ch,GL_COMPILE);
glBindTexture(GL_TEXTURE_2D,tex_base[ch]);
//first we need to move over a little so that
//the character has the right amount of space
//between it and the one before it.
glTranslatef(bitmap_glyph->left,0,0);
//Now we move down a little in the case that the
//bitmap extends past the bottom of the line
//(this is only true for characters like 'g' or 'y'.
glPushMatrix();
glTranslatef(0,bitmap_glyph->top-bitmap.rows,0);
//Now we need to account for the fact that many of
//our textures are filled with empty padding space.
//We figure what portion of the texture is used by
//the actual character and store that information in
//the x and y variables, then when we draw the
//quad, we will only reference the parts of the texture
//that we contain the character itself.
float x=(float)bitmap.width / (float)width,
y=(float)bitmap.rows / (float)height;
//Here we draw the texturemaped quads.
//The bitmap that we got from FreeType was not
//oriented quite like we would like it to be,
//so we need to link the texture to the quad
//so that the result will be properly aligned.
glBegin(GL_QUADS);
glTexCoord2d(0,0);
glVertex2f(0,bitmap.rows);
glTexCoord2d(0,y);
glVertex2f(0,0);
glTexCoord2d(x,y);
glVertex2f(bitmap.width,0);
glTexCoord2d(x,0);
glVertex2f(bitmap.width,bitmap.rows);
glEnd();
glPopMatrix();
glTranslatef(face->glyph->advance.x >> 6 ,0,0);
//increment the raster position as if we were a bitmap font.
//(only needed if you want to calculate text length)
//glBitmap(0,0,0,0,face->glyph->advance.x >> 6,0,NULL);
//Finnish the display list
glEndList();
}
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;
}
///Create a display list corresponding to the given character.
///glyph_id = actual font glyph id (32 bits), ch = id for printing to screen (16 bits)
void font_data::make_dlist(uint glyph_id, ushort ch) {
// get the texture reference
m.alloc(ch);
GLuint tex = m.get_t(ch);
// Translate Win-1252 with additions to Unicode
if (remapflag) {
if (glyph_id >= 16 && glyph_id < 32) glyph_id = unichar_low[glyph_id-16];
else if (glyph_id >= 128 && glyph_id < 160) glyph_id = unichar_high[glyph_id-128];
}
// Load the Glyph for our character.
if (FT_Load_Glyph(face, FT_Get_Char_Index(face, glyph_id), FT_LOAD_DEFAULT))
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");
// 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;
// Use our helper function to get the widths of
// the bitmap data that we will need in order to create
// our texture.
// The max(2, ...) is used to correct for OpenGL, which
// apparently does not like to have rows less than 4 bytes
// long. Probably a packing thing.
int width = max(2, next_p2(bitmap.width));
int height = next_p2(bitmap.rows);
// Allocate memory (temporarily) for the texture data.
GLubyte* expanded_data = new GLubyte[2 * width * height];
// Here we fill in the data for the expanded bitmap.
// Notice that we are using two channel bitmap (one for
// luminocity and one for alpha).
// Luma always 255. Alpha stays alpha.
// (unless of course, it is premultiplied, which in OpenGL it is not.)
// We use the ?: operator so that value which we use
// will be 0 if we are in the padding zone, and whatever
// is the Freetype bitmap otherwise.
for (int j = 0; j < height; j++) {
for (int i = 0; i < width; i++) {
expanded_data[ 2*(i+j*width) ] = 255;
expanded_data[ 2*(i+j*width)+1 ] =
(i >= bitmap.width || j >= bitmap.rows) ?
0 : bitmap.buffer[i + bitmap.width*j];
}
}
// Now we just setup some texture paramaters.
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
// Here we actually create the texture itself, notice
// that we are using GL_LUMINANCE_ALPHA to indicate that
// we are using 2 channel data.
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height,
0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, expanded_data);
// With the texture created, we don't need the expanded data anymore
delete [] expanded_data;
// So now we can create the display list
glNewList(list_base + ch, GL_COMPILE);
glBindTexture(GL_TEXTURE_2D, tex);
//glPushMatrix();
// First we need to move over a little so that
// the character has the right amount of space
// between it and the one before it.
//glTranslatef((float) bitmap_glyph->left,0,0);
// Now we move down a little in the case that the
// bitmap extends past the bottom of the line
// (this is only true for characters like 'g' or 'y'.
//glTranslatef(0,(float)bitmap_glyph->top-bitmap.rows,0);
float left_pad = (float) bitmap_glyph->left;
float bot_pad = (float) bitmap.rows-bitmap_glyph->top;
glTranslatef(left_pad, -bot_pad, 0);
// Now we need to account for the fact that many of
// our textures are filled with empty padding space.
// We figure what portion of the texture is used by
// the actual character and store that information in
// the x and y variables, then when we draw the
// quad, we will only reference the parts of the texture
// that we contain the character itself.
float x = (float) bitmap.width / (float) width,
y = (float) bitmap.rows / (float) height;
// Here we draw the texturemapped quads.
// The bitmap that we got from FreeType was not
// oriented quite like we would like it to be,
// so we need to link the texture to the quad
// so that the result will be properly aligned.
glBegin(GL_QUADS);
glTexCoord2d(0, 0); glVertex2f(0, (float) bitmap.rows);
glTexCoord2d(0, y); glVertex2f(0, 0);
glTexCoord2d(x, y); glVertex2f((float) bitmap.width, 0);
glTexCoord2d(x, 0); glVertex2f((float) bitmap.width, (float) bitmap.rows);
glEnd();
//glPopMatrix();
// Get width, round, and translate
short ch_width = (short)(face->glyph->linearHoriAdvance >> 16);
if (face->glyph->linearHoriAdvance & 0x8000) ++ch_width;
//glTranslatef(ch_width, 0, 0);
glTranslatef(ch_width-left_pad, bot_pad, 0);
// The two ways to do width:
// face->glyph->linearHoriAdvance >> 16
// face->glyph->advance.x >> 6
// Finish the display list
glEndList();
// Store the width of this character
m.set_w(ch, ch_width);
}
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++ ) {
// ----------------------------------------------- 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;
region.x=1;
region.y=1;
#ifdef RENDERSTRING
stringwidth=0;
stringheight=0;
stringshift=0;
#endif
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;
#ifdef RENDERSTRING
static size_t maxh=0;
if (charcodes[i]==13) { stringshift+=maxh+1; region.x=1; }
if (h>maxh) maxh=h;
//region.y=stringshift+maxh-h+1+(h-ft_glyph_top);
region.y=stringshift+maxh-ft_glyph_top+1;
// if (stringshift+h+h-ft_glyph_top+1>stringheight) stringheight=stringshift+h+h-ft_glyph_top+1;
if (region.y+h>stringheight) stringheight=region.y+h;
if (region.x+w>stringwidth) stringwidth=region.x+w;
// if (region.y>=height) { missed++; continue; }
// if (region.x+w>=width) {missed++; continue; }
// if (h+h-ft_glyph_top+1>=height) { missed++; continue; }
// if (h+h-ft_glyph_top+2>=height) { missed++; continue; }
// if (region.y+maxh>=height) { missed++; continue; }
#else
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;
}
#endif
w = w - 1;
h = h - 1;
x = region.x;
y = region.y;
if (charcodes[i]!=13) {
#ifdef RENDERSTRING
if (!(x<width)||!((x+w)<=width)||!(y<height)||!((y+h)<=height)) { missed++; continue; }
#endif
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;
#ifdef RENDERSTRING
if (charcodes[i]!=13) region.x+=(int)glyph->advance_x;
#endif
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;
}
long EMSCRIPTEN_KEEPALIVE c_Glyph_toBitmap(long glyph, int renderMode) {
FT_Glyph bitmap = (FT_Glyph)glyph;
FT_Error error = FT_Glyph_To_Bitmap(&bitmap, (FT_Render_Mode)renderMode, NULL, 1);
if(error) return 0;
return (long)bitmap;
}
/** 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;
}
void freetype_genFontTexture_ascii(FT_Face face, c_font *gameFont, unsigned int pixel_height)
{
const unsigned int glyphsToRender = 256; // ASCII set, change at your peril
GLubyte *pixel_data;
unsigned int glyph_pixel_width = 0;
unsigned int glyph_pixel_height = 0;
unsigned int texture_width = 0;
unsigned int texture_height = 0;
FT_Glyph glyphArray[glyphsToRender];
FT_BitmapGlyph bitmapGlyphArray[glyphsToRender];
unsigned int lv; // loop variable
// first loop through glyphs to determine how big the bigest one is.
for (lv=0 ; lv<glyphsToRender ; lv++)
{
int error;
error = FT_Load_Glyph(face, FT_Get_Char_Index( face, lv), FT_LOAD_DEFAULT);
if (error)
{
printf("FT_Load_Glyph [%u] ", error);
}
error = FT_Get_Glyph( face->glyph, &glyphArray[lv] );
if (error)
{
printf("FT_Get_Glyph [%u] ", error);
}
FT_Glyph_To_Bitmap( &glyphArray[lv], ft_render_mode_normal, 0, 1 );
bitmapGlyphArray[lv] = (FT_BitmapGlyph)glyphArray[lv];
FT_Bitmap& bitmap = bitmapGlyphArray[lv]->bitmap;
if ((unsigned int)bitmap.rows > glyph_pixel_height) glyph_pixel_height = bitmap.rows;
if ((unsigned int)bitmap.width > glyph_pixel_width) glyph_pixel_width = bitmap.width;
}
// make sure each glyph is a power of 2
// not 100% necessary, but if we want each glyph to have an equal percentage
// of texture space we better do it.
glyph_pixel_width = next_power_of_2(glyph_pixel_width);
glyph_pixel_height = next_power_of_2(glyph_pixel_height);
// now all glyph specs are pretty much finalized (so lets brag about it)
printf(" character size: %ux%u, ", glyph_pixel_width, glyph_pixel_height);
texture_width = glyph_pixel_width * 16;
texture_height = glyph_pixel_height * 16;
printf("ascii texture size: %ux%u\n", texture_width, texture_height);
// make some pixel data in ram (this will be the font texture)
unsigned int bytesForImage = 2 * texture_width * texture_height;
pixel_data = new GLubyte[bytesForImage];
// zero out all the newly allocated data
for (unsigned int clearloop=0 ; clearloop < bytesForImage ; clearloop++ )
{
pixel_data[clearloop] = 0;
}
unsigned int glyphX_start = 0;
unsigned int glyphY_start = 0;
// now to go through each glyph again
for (lv=0 ; lv<glyphsToRender ; lv++ )
{
FT_Bitmap& bitmap = bitmapGlyphArray[lv]->bitmap;
glyphX_start = lv % 16;
glyphY_start = lv / 16;
glyphX_start *= glyph_pixel_width;
glyphY_start *= glyph_pixel_height;
// draw glyph out in the correct spot on the 16x16 glyph texture
for(unsigned int gx=0; gx< (unsigned int)bitmap.width; gx++)
{
for(unsigned int gy=0; gy< (unsigned int)bitmap.rows ; gy++)
{
unsigned char *byte_luminence;
unsigned char *byte_alpha;
// calculate which pixels to work on
unsigned int pixel_mem_loc =
2 * ( // channels: luminence & alpha
texture_width *
(glyphY_start + gy) +
glyphX_start + gx
);
byte_luminence = &pixel_data[ pixel_mem_loc ];
byte_alpha = &pixel_data[ pixel_mem_loc + 1 ];
*byte_luminence = 255; // or this if you'd rather do this to blacken the alpha edges: bitmap.buffer[gx + bitmap.width * gy];
*byte_alpha = bitmap.buffer[gx + bitmap.width * gy];
}
}
// pixel coordinates for glyph
unsigned int top = (lv / 16) * glyph_pixel_height;
unsigned int left = (lv % 16) * glyph_pixel_width;
unsigned int bottom = top + bitmap.rows;
unsigned int right = left + bitmap.width;
// texture coordinates for glyph
float uv_top = (float)top / texture_height;
float uv_left = (float)left / texture_width;
float uv_bottom = (float)bottom / texture_height;
float uv_right = (float)right / texture_width;
// seems some letters get cut too short to see their nice anti-aliasing - should probably do this when rendering
// but then again it's probably a single pixel of low alpha that's getting cut so it may be best to do a single
// pixel pad here, on the left and right sides.
uv_top -= 1 * (1.0f / texture_height);
uv_left -= 1 * (1.0f / texture_width);
uv_bottom += 1 * (1.0f / texture_height);
uv_right += 1 * (1.0f / texture_width);
//////////////////////////////////////////////////////////////////
// actually assign this data to the class
gameFont->glyph[lv].set_uv(pixel_height, texture_width, texture_height, uv_top, uv_left, uv_bottom, uv_right);
// figure out how much to lower characters that hang below the line
float shift_y = (float)bitmap.rows - (float)bitmapGlyphArray[lv]->top;
shift_y /= texture_height;
gameFont->glyph[lv].set_shift(pixel_height, texture_height, shift_y);
// set the advance - not used yet
//face->glyph->advance;
float advance = glyphArray[lv]->advance.x;
gameFont->glyph[lv].set_advance(pixel_height, texture_width, advance);
// test to see if glyph uv coordinates are what they should be
/*if (lv == (unsigned int)'g')
{
printf("%c - uv(t=%f, l=%f, b=%f, r=%f) - shift(y=%f) - advance(x=%f)\n",
(char)lv,
gameFont->glyph[lv].uv_top(),
gameFont->glyph[lv].uv_left(),
gameFont->glyph[lv].uv_bottom(),
gameFont->glyph[lv].uv_right(),
gameFont->glyph[lv].shift_y(),
gameFont->glyph[lv].advance_x());
}*/
}
glGenTextures(1, &gameFont->opengl_texture_id);
glBindTexture( GL_TEXTURE_2D, gameFont->opengl_texture_id);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
//Here we actually create the texture itself, notice
//that we are using GL_LUMINANCE_ALPHA to indicate that
//we are using 2 channel data.
//glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, texture_width, texture_height, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, pixel_data );
// do that line above - or build some mipmaps for trilinear filtering
gluBuild2DMipmaps( GL_TEXTURE_2D, GL_LUMINANCE_ALPHA, texture_width, texture_height, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, pixel_data );
//printf("texture specs: %ux%u\n", wsf, height);
// now that all of that the image has been loading into the
// graphics card, we can free up the copy we built in the ram
delete pixel_data;
}
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;
}
/*
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;
}
/*
* 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 */
}
/**
* Load glyphs corresponding to the UTF-32 codepoint code.
*/
static int load_glyph(AVFilterContext *ctx, Glyph **glyph_ptr, uint32_t code)
{
DrawTextContext *s = ctx->priv;
FT_BitmapGlyph bitmapglyph;
Glyph *glyph;
struct AVTreeNode *node = NULL;
int ret;
/* load glyph into s->face->glyph */
if (FT_Load_Char(s->face, code, s->ft_load_flags))
return AVERROR(EINVAL);
glyph = av_mallocz(sizeof(*glyph));
if (!glyph) {
ret = AVERROR(ENOMEM);
goto error;
}
glyph->code = code;
if (FT_Get_Glyph(s->face->glyph, &glyph->glyph)) {
ret = AVERROR(EINVAL);
goto error;
}
if (s->borderw) {
glyph->border_glyph = glyph->glyph;
if (FT_Glyph_StrokeBorder(&glyph->border_glyph, s->stroker, 0, 0) ||
FT_Glyph_To_Bitmap(&glyph->border_glyph, FT_RENDER_MODE_NORMAL, 0, 1)) {
ret = AVERROR_EXTERNAL;
goto error;
}
bitmapglyph = (FT_BitmapGlyph) glyph->border_glyph;
glyph->border_bitmap = bitmapglyph->bitmap;
}
if (FT_Glyph_To_Bitmap(&glyph->glyph, FT_RENDER_MODE_NORMAL, 0, 1)) {
ret = AVERROR_EXTERNAL;
goto error;
}
bitmapglyph = (FT_BitmapGlyph) glyph->glyph;
glyph->bitmap = bitmapglyph->bitmap;
glyph->bitmap_left = bitmapglyph->left;
glyph->bitmap_top = bitmapglyph->top;
glyph->advance = s->face->glyph->advance.x >> 6;
/* measure text height to calculate text_height (or the maximum text height) */
FT_Glyph_Get_CBox(glyph->glyph, ft_glyph_bbox_pixels, &glyph->bbox);
/* cache the newly created glyph */
if (!(node = av_tree_node_alloc())) {
ret = AVERROR(ENOMEM);
goto error;
}
av_tree_insert(&s->glyphs, glyph, glyph_cmp, &node);
if (glyph_ptr)
*glyph_ptr = glyph;
return 0;
error:
if (glyph)
av_freep(&glyph->glyph);
av_freep(&glyph);
av_freep(&node);
return ret;
}
void Font::makeDisplayList(FT_Face face, char ch) {
// Load Glyph for character
if (FT_Load_Glyph(face, FT_Get_Char_Index(face, ch), FT_LOAD_DEFAULT))
throw std::runtime_error("FT_Load_Glyph failed");
// Move Glyph into object
FT_Glyph glyph;
if (FT_Get_Glyph(face->glyph, &glyph))
throw std::runtime_error("FT_Get_Glyph failed");
// Convert Glyph to Bitmap
FT_Glyph_To_Bitmap(&glyph, ft_render_mode_normal, 0, 1);
FT_BitmapGlyph bitmap_glyph = (FT_BitmapGlyph)glyph;
FT_Bitmap &bitmap = bitmap_glyph->bitmap;
// Resize to OpenGL power of 2 and two channels (luminosity and alpha)
int width = nextPow2(bitmap.width);
int height = nextPow2(bitmap.rows);
GLubyte *expandedData = new GLubyte[2 * width * height];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
int pos = 2 * (x + y*width);
expandedData[pos] = expandedData[pos+1] =
(x >= bitmap.width || y >= bitmap.rows) ?
0 : bitmap.buffer[x + bitmap.width * y];
}
}
// Create OpenGL texture
glBindTexture(GL_TEXTURE_2D, m_textures[ch]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0,
GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, expandedData);
delete[] expandedData;
// Now we create the Display List
glNewList(m_displayLists+ch, GL_COMPILE);
glBindTexture(GL_TEXTURE_2D, m_textures[ch]);
glPushMatrix();
// Center character correctly
glTranslatef(bitmap_glyph->left, 0, 0);
glTranslatef(0, bitmap_glyph->top - bitmap.rows, 0);
// Calculate real size versus padding space
float x = float(bitmap.width) / float(width);
float y = float(bitmap.rows) / float(height);
// Draw the quad
glBegin(GL_QUADS);
glTexCoord2d(0, 0);
glVertex2f(0, bitmap.rows);
glTexCoord2d(0, y);
glVertex2f(0, 0);
glTexCoord2d(x, y);
glVertex2f(bitmap.width, 0);
glTexCoord2d(x, 0);
glVertex2f(bitmap.width, bitmap.rows);
glEnd();
glPopMatrix();
glTranslatef(face->glyph->advance.x >> 6, 0, 0);
// Increment the raster position as if it were a bitmap font
// glBitmap(0, 0, 0, 0, face->glyph->advance.x >> 6, 0, NULL);
glEndList();
}
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
}
Text *text_create(Font *font, const char *char_string, int size)
{
const uint8_t *string = (const uint8_t *) char_string;
Text *text;
FT_Face face = font->face;
FT_Glyph *glyph_string;
FT_Vector *pos;
FT_BBox bbox;
FT_Long width, height;
size_t len;
float x, y;
int i;
if (FT_Set_Char_Size(face, 0, size*64, 0, 0) != 0)
{
log_err("Error setting character size\n");
return NULL;
}
text = ralloc(font, Text);
if (text == NULL)
{
log_err("Out of memory\n");
return NULL;
}
text->size = size;
text->vao = text->vbo = text->texture = 0;
text->texture_image = NULL;
text->string = (uint8_t *) ralloc_strdup(text, (const char *) string);
len = strlen((const char *) string); /* Bytecount */
/* We allocate more space than necessary for the glyph string, better safe
* than sorry. */
glyph_string = ralloc_array(text, FT_Glyph, len);
pos = ralloc_array(text, FT_Vector, len);
if (text->string == NULL || glyph_string == NULL || pos == NULL)
{
log_err("Out of memory\n");
ralloc_free(text);
return NULL;
}
/* The UTF-8 bytestring is converted to an array of glyphs */
glyphstring_create(face, text, glyph_string, pos);
/* We determine how big the text will be. This information is used
* to compute the size of the texture we'll store the text in */
compute_glyphstring_bbox(glyph_string, pos, text->num_glyphs, &bbox);
width = bbox.xMax - bbox.xMin;
height = bbox.yMax - bbox.yMin;
text->width = (width/64 + 0x3) & ~0x3; /* Align to 4 bytes */
text->height = height/64;
text->texture_image = rzalloc_array(text, GLubyte,
text->width * text->height);
if (text->texture_image == NULL)
{
log_err("Out of memory\n");
for (i = 0; i < text->num_glyphs; i++)
FT_Done_Glyph(glyph_string[i]);
ralloc_free(text);
return NULL;
}
/* Now we can render the text to a texture */
for (i = 0; i < text->num_glyphs; i++)
{
FT_Glyph glyph;
FT_BitmapGlyph bitmap_glyph;
FT_Vector pen;
glyph = glyph_string[i];
pen.x = pos[i].x;
pen.y = pos[i].y;
/* Render the new glyph and destroy the old one */
if (FT_Glyph_To_Bitmap(&glyph, FT_LOAD_TARGET_NORMAL, &pen, 1) != 0)
{
log_err("Error rendering glyph to bitmap for character '%c'\n",
string[i]);
FT_Done_Glyph(glyph_string[i]);
continue;
}
bitmap_glyph = (FT_BitmapGlyph) glyph;
blit_glyph(bitmap_glyph, text->texture_image, (pen.x - bbox.xMin)/64,
(pen.y - bbox.yMin)/64, text->width, text->height);
FT_Done_Glyph(glyph);
}
ralloc_free(glyph_string);
ralloc_free(pos);
x = bbox.xMin/64;
y = bbox.yMin/64;
/* Why do we add text->width and not bbox.xMax? Because OpenGL wants
* textures aligned at 4 bytes. This fixes a very subtle bug with
* a very noticeable effect */
text->vertex[0].x = x;
text->vertex[0].y = y;
text->vertex[0].u = 0;
text->vertex[0].v = 0;
text->vertex[1].x = x + text->width;
text->vertex[1].y = y;
text->vertex[1].u = 1;
text->vertex[1].v = 0;
text->vertex[2].x = x + text->width;
text->vertex[2].y = y + text->height;
text->vertex[2].u = 1;
text->vertex[2].v = 1;
text->vertex[3].x = x;
text->vertex[3].y = y + text->height;
text->vertex[3].u = 0;
text->vertex[3].v = 1;
for (i = 0; i < 4; i++)
{
text->vertex[i].r = 0;
text->vertex[i].g = 0;
text->vertex[i].b = 1;
text->vertex[i].a = 1;
}
return text;
}
bool TGLFont::Load(const char* fontname)
{
char full_filename[512];
sprintf_s(full_filename,sizeof(full_filename),"Data/Fonts/%s", fontname);
FT_Face ftFace;
FT_Error err_code = FT_New_Face(ftLibrary,full_filename,0,&ftFace);
if(err_code == FT_Err_Unknown_File_Format)
{
LogFile->Write("Bad font file format: "+string(fontname),LT_ERROR);
return false;
}
else if (err_code)
{
LogFile->Write("Can't load font: "+string(fontname),LT_ERROR);
return false;
}
if (iFontSize > min(ftFace->max_advance_width,ftFace->max_advance_height))
{
FT_Done_Face(ftFace);
LogFile->Write("Font size greater that supported font: "+string(fontname),LT_ERROR);
return false;
}
if (FT_Set_Char_Size(ftFace, iFontSize*64, iFontSize*64, iHorizDPI, iVertDPI))
{
FT_Done_Face(ftFace);
LogFile->Write("Can't set font size for font: "+string(fontname),LT_ERROR);
return false;
}
// new code
FT_Long glyphs_count = ftFace->num_glyphs;
if (glyphs_count == 0)
{
FT_Done_Face(ftFace);
LogFile->Write("No glyphs in font: "+string(fontname),LT_ERROR);
return false;
}
try
{
PLuint gridsize = GetGridSize(iFontSize);
/*sprintf_s(full_filename,sizeof(full_filename),"???%s-%d", fontname, fontsize);
pTex = pTextureSpool->CreateFontCashe(full_filename, gridsize*16, gridsize*16);*/
((Texture::Texture2D&)pTex.GetObj()).LoadFromMem(0, gridsize*16, gridsize*16, Loader::Image::DT_RGBA);
pGlyph = new Glyph2D*[MAXBYTE+1];
PLuint xoffset = 2 + iFontSize / 2 + 2; // reverse space for empty glyph
PLuint yoffset = 2;
PLint max_in_line = 0;
for(PLuint i = 0; i <= MAXBYTE; i++)
{
wchar_t unicode_char = ctowc(i,iCodepage);
if ((unicode_char != 0)&&(unicode_char < glyphs_count))
{
FT_UInt ch_index = FT_Get_Char_Index(ftFace, unicode_char);
if (ch_index)
{
if (FT_Load_Glyph( ftFace, ch_index, FT_LOAD_DEFAULT ))
{
pGlyph[i] = new Glyph2D(gridsize*16, 2, 2, iFontSize / 2, 1, 0); // empty glyph
continue;
}
FT_Glyph ftGlyph;
if (FT_Get_Glyph( ftFace->glyph, &ftGlyph ))
{
pGlyph[i] = new Glyph2D(gridsize*16, 2, 2, iFontSize / 2, 1, 0); // empty glyph
continue;
}
if (FT_Glyph_To_Bitmap( &ftGlyph, FT_RENDER_MODE_NORMAL, 0, 1 ))
{
pGlyph[i] = new Glyph2D(gridsize*16, 2, 2, iFontSize / 2, 1, 0); // empty glyph
continue;
}
FT_BitmapGlyph ftBitmapGlyph = (FT_BitmapGlyph)ftGlyph;
FT_Bitmap& bitmap = ftBitmapGlyph->bitmap;
if ((bitmap.rows == 0) || (bitmap.width == 0))
{
pGlyph[i] = new Glyph2D(gridsize*16, 2, 2, iFontSize / 2, 1, 0); // empty glyph
continue;
}
GLubyte* pExpData = new GLubyte[4*bitmap.width*bitmap.rows];
for (PLint k = 0; k < bitmap.rows; k++)
{
for(PLint j = 0; j < bitmap.width; j++)
{
unsigned char buf = bitmap.buffer[j + bitmap.width*k];
pExpData[4*(j+k*bitmap.width)] = 255;
pExpData[4*(j+k*bitmap.width)+1] = 255;
pExpData[4*(j+k*bitmap.width)+2] = 255;
pExpData[4*(j+k*bitmap.width)+3] = buf;
}
}
if (xoffset + bitmap.width >= gridsize*16)
{
xoffset = 2;
yoffset += max_in_line + 2;
}
if (bitmap.rows > max_in_line)
max_in_line = bitmap.rows;
((Texture::Texture2D&)pTex.GetObj()).SetRectFromMem(xoffset,yoffset,pExpData,bitmap.width,bitmap.rows,Loader::Image::DT_RGBA);
pGlyph[i] = new Glyph2D(gridsize*16, xoffset, yoffset, bitmap.width, bitmap.rows, ftBitmapGlyph->top-bitmap.rows);
delete[] pExpData;
xoffset += bitmap.width + 2;
}
else
pGlyph[i] = new Glyph2D(gridsize*16, 2, 2, iFontSize / 2, 1, 0); // empty glyph
}
else
pGlyph[i] = new Glyph2D(gridsize*16, 2, 2, iFontSize / 2, 1, 0); // empty glyph
}
pTex->SendGPU(false);
}
catch(...)
{
delete[] pGlyph;
return false;
}
FT_Done_Face(ftFace);
sFontname = fontname;
return true;
}
void RenderText::draw(){
//glClearColor(1, 1, 1, 0);
glEnable(GL_BLEND);
//glEnable(GL_TEXTURE_2D);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
//glDisable(GL_DEPTH_TEST);
//glDisable(GL_CULL_FACE);
//glDisable(GL_TEXTURE_2D);
//glDisable(GL_LIGHTING);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
int stageWidth, stageHeight;
glfwGetWindowSize(&stageWidth, &stageHeight);
glOrtho(0.0f, stageWidth, 0.0f, stageHeight, 0.0f, 1.0f);
glMatrixMode(GL_MODELVIEW);
int i;
if(selectedInputs.size()>0&&selectedInputs[0]!=this&&inputAllowed&&text==""){
dispText = "Click to type here";
}else {
dispText=text;
}
if(selectedInputs.size()>0&&selectedInputs[0]==this&&inputAllowed){
static int curserOn = 0;
static float prevSwitchTime=glfwGetTime();
if(glfwGetTime()-prevSwitchTime>0.3){
curserOn = !curserOn;
prevSwitchTime=glfwGetTime();
}
if(curserOn){
dispText.append("_");
}
}
const size_t length = dispText.length();
textures = (GLuint*)calloc(length, sizeof(GLuint));
glGenTextures(length, textures);
glPushMatrix();
glTranslatef(x, y, 0);
glPushMatrix();
for (i = 0; i < length; ++i) {
FT_Load_Glyph(face, FT_Get_Char_Index(face, dispText.at(i)), FT_LOAD_DEFAULT);
FT_Get_Glyph(face->glyph, &glyph);
FT_Glyph_To_Bitmap(&glyph, FT_RENDER_MODE_NORMAL, 0, 1);
bitmap_glyph = (FT_BitmapGlyph)glyph;
bitmap = bitmap_glyph->bitmap;
int width = RenderText::npo2(bitmap.width);
int height = RenderText::npo2(bitmap.rows);
float x = (float)bitmap.width / (float)width;
float y = (float)bitmap.rows / (float)height;
glBindTexture(GL_TEXTURE_2D, textures[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_ALPHA, GL_UNSIGNED_BYTE, 0);
glPixelStorei(GL_UNPACK_ALIGNMENT,1); // no alignment
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, bitmap.width, bitmap.rows, GL_ALPHA, GL_UNSIGNED_BYTE, bitmap.buffer);
glPushMatrix();
glTranslatef(0, bitmap_glyph->top - bitmap.rows, 0);
glBindTexture(GL_TEXTURE_2D, textures[i]);
glBegin(GL_QUADS);
glTexCoord2f(0, 0); glVertex2f(0, bitmap.rows);
glTexCoord2f(0, y); glVertex2f(0, 0);
glTexCoord2f(x, y); glVertex2f(bitmap.width, 0);
glTexCoord2f(x, 0); glVertex2f(bitmap.width, bitmap.rows);
glEnd();
glPopMatrix();
glTranslatef(glyph->advance.x / 65536, 0, 0);
FT_Done_Glyph(glyph);
}
glPopMatrix();
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glDeleteTextures(length, textures);
free(textures);
}
// 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;
}
void SubtitleRenderer::load_glyph(char32_t codepoint) {
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, 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 = 0.6;
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(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, codepoint, image, glyph_origin, escapement);
assert(!vgGetError());
if (image) {
vgDestroyImage(image);
assert(!vgGetError());
}
} catch(...) {
escapement[0] = 0;
escapement[1] = 0;
vgSetGlyphToImage(vg_font, codepoint, VG_INVALID_HANDLE, escapement, escapement);
assert(!vgGetError());
}
};
load_glyph_internal(ft_face_, vg_font_, false);
glyphs_[codepoint].advance = escapement[0];
load_glyph_internal(ft_face_, vg_font_border_, true);
}
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
}
