/**
* Callback called from _mesa_HashWalk()
*/
static void
count_tex_size(GLuint key, void *data, void *userData)
{
const struct gl_texture_object *texObj =
(const struct gl_texture_object *) data;
GLuint *total = (GLuint *) userData;
*total = *total + texture_size(texObj);
}
/**
* Compute total size (in bytes) of all textures for the given context.
* For debugging purposes.
*/
GLuint
_mesa_total_texture_memory(struct gl_context *ctx)
{
GLuint tgt, total = 0;
_mesa_HashWalk(ctx->Shared->TexObjects, count_tex_size, &total);
/* plus, the default texture objects */
for (tgt = 0; tgt < NUM_TEXTURE_TARGETS; tgt++) {
total += texture_size(ctx->Shared->DefaultTex[tgt]);
}
return total;
}
/** Render a glyph for a character into bitmap and save it into the glyph page.
* \param c The character to be loaded.
* \param c \ref GlyphInfo for the character.
*/
void FontWithFace::insertGlyph(wchar_t c, const GlyphInfo& gi)
{
assert(gi.glyph_index > 0);
assert(gi.font_number < m_face_ttf->getTotalFaces());
FT_Face cur_face = m_face_ttf->getFace(gi.font_number);
FT_GlyphSlot slot = cur_face->glyph;
// Same face may be shared across the different FontWithFace,
// so reset dpi each time
font_manager->checkFTError(FT_Set_Pixel_Sizes(cur_face, 0, getDPI()),
"setting DPI");
font_manager->checkFTError(FT_Load_Glyph(cur_face, gi.glyph_index,
FT_LOAD_DEFAULT), "loading a glyph");
font_manager->checkFTError(shapeOutline(&(slot->outline)),
"shaping outline");
font_manager->checkFTError(FT_Render_Glyph(slot, FT_RENDER_MODE_NORMAL),
"rendering a glyph to bitmap");
// Convert to an anti-aliased bitmap
FT_Bitmap* bits = &(slot->bitmap);
core::dimension2du texture_size(bits->width + 1, bits->rows + 1);
if ((m_used_width + texture_size.Width > getGlyphPageSize() &&
m_used_height + m_current_height + texture_size.Height >
getGlyphPageSize()) ||
m_used_height + texture_size.Height > getGlyphPageSize())
{
// Add a new glyph page if current one is full
createNewGlyphPage();
}
// Determine the linebreak location
if (m_used_width + texture_size.Width > getGlyphPageSize())
{
m_used_width = 0;
m_used_height += m_current_height;
m_current_height = 0;
}
const unsigned int cur_tex = m_spritebank->getTextureCount() -1;
#ifndef SERVER_ONLY
video::ITexture* tex = m_spritebank->getTexture(cur_tex);
glBindTexture(GL_TEXTURE_2D, tex->getOpenGLTextureName());
assert(bits->pixel_mode == FT_PIXEL_MODE_GRAY);
if (CVS->isARBTextureSwizzleUsable())
{
glTexSubImage2D(GL_TEXTURE_2D, 0, m_used_width, m_used_height,
bits->width, bits->rows, GL_RED, GL_UNSIGNED_BYTE, bits->buffer);
}
else
{
const unsigned int size = bits->width * bits->rows;
uint8_t* image_data = new uint8_t[size * 4];
memset(image_data, 255, size * 4);
for (unsigned int i = 0; i < size; i++)
image_data[4 * i + 3] = bits->buffer[i];
glTexSubImage2D(GL_TEXTURE_2D, 0, m_used_width, m_used_height,
bits->width, bits->rows, GL_BGRA, GL_UNSIGNED_BYTE, image_data);
delete[] image_data;
}
if (tex->hasMipMaps())
glGenerateMipmap(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, 0);
#endif
// Store the rectangle of current glyph
gui::SGUISpriteFrame f;
gui::SGUISprite s;
core::rect<s32> rectangle(m_used_width, m_used_height,
m_used_width + bits->width, m_used_height + bits->rows);
f.rectNumber = m_spritebank->getPositions().size();
f.textureNumber = cur_tex;
// Add frame to sprite
s.Frames.push_back(f);
s.frameTime = 0;
m_spritebank->getPositions().push_back(rectangle);
m_spritebank->getSprites().push_back(s);
// Save glyph metrics
FontArea a;
a.advance_x = cur_face->glyph->advance.x / BEARING;
a.bearing_x = cur_face->glyph->metrics.horiBearingX / BEARING;
const int cur_height = (cur_face->glyph->metrics.height / BEARING);
const int cur_offset_y = cur_height -
(cur_face->glyph->metrics.horiBearingY / BEARING);
a.offset_y = m_glyph_max_height - cur_height + cur_offset_y;
a.offset_y_bt = -cur_offset_y;
a.spriteno = f.rectNumber;
m_character_area_map[c] = a;
// Store used area
m_used_width += texture_size.Width;
if (m_current_height < texture_size.Height)
m_current_height = texture_size.Height;
} // insertGlyph
