// Generates the texture data for a layer (for the texture database).
bool FontFaceLayer::GenerateTexture(int texture_id)
{
if (texture_id < 0 ||
texture_id > texture_layout.GetNumTextures())
return false;
const FontGlyphList& glyphs = handle->GetGlyphs();
// Generate the texture data.
TextureLayoutTexture* texture = texture_layout.GetTexture(texture_id);
if (texture && !texture->GetTextureData())
texture->AllocateTexture();
int rectangle_count = texture_layout.GetNumRectangles();
for (int i = 0; i < rectangle_count; ++i)
{
TextureLayoutRectangle* rectangle = texture_layout.GetRectangle(i);
if (rectangle->GetTextureIndex() != texture_id)
continue;
Character* character = characters[(word) rectangle->GetId()];
if (!character)
continue;
const FontGlyph* glyph = glyphs[rectangle->GetId()];
if (!glyph)
continue;
if (effect == NULL)
{
// Copy the glyph's bitmap data into its allocated texture.
if (glyph->bitmap_data != NULL)
{
byte* destination = rectangle->GetTextureData();
byte* source = glyph->bitmap_data;
for (int j = 0; j < glyph->bitmap_dimensions.y; ++j)
{
for (int k = 0; k < glyph->bitmap_dimensions.x; ++k)
destination[k * 4 + 3] = source[k];
destination += rectangle->GetTextureStride();
source += glyph->bitmap_dimensions.x;
}
}
}
else
{
effect->GenerateGlyphTexture(rectangle->GetTextureData(), Vector2i(Math::RealToInteger(character->dimensions.x), Math::RealToInteger(character->dimensions.y)), rectangle->GetTextureStride(), *glyph);
}
}
return true;
}
// Generate texture layout for all unplaced characters
bool FontFaceLayer::GenerateLayout()
{
int prior_num_rectangles = texture_layout.GetNumRectangles();
int prior_num_textures = texture_layout.GetNumTextures();
// Generate the texture layout; this will position the glyph rectangles efficiently and
// allocate the texture data ready for writing.
if (!texture_layout.GenerateLayout(512))
return false;
// Iterate over each rectangle in the layout, copying the glyph data into the rectangle as
// appropriate and generating geometry.
int rectangle_count = texture_layout.GetNumRectangles();
for (int i = prior_num_rectangles; i < rectangle_count; ++i)
{
TextureLayoutRectangle* rectangle = texture_layout.GetRectangle(i);
Character* character = characters[(word) rectangle->GetId()];
if (!character)
continue;
const TextureLayoutTexture* texture = texture_layout.GetTexture(rectangle->GetTextureIndex());
// Set the character's texture index.
character->texture_index = rectangle->GetTextureIndex();
// Generate the character's texture coordinates.
character->texcoords[0].x = float(rectangle->GetPosition().x) / float(texture->GetDimensions().x);
character->texcoords[0].y = float(rectangle->GetPosition().y) / float(texture->GetDimensions().y);
character->texcoords[1].x = float(rectangle->GetPosition().x + rectangle->GetDimensions().x) / float(texture->GetDimensions().x);
character->texcoords[1].y = float(rectangle->GetPosition().y + rectangle->GetDimensions().y) / float(texture->GetDimensions().y);
}
if (prior_num_textures > 0 && prior_num_rectangles != rectangle_count)
textures[prior_num_textures-1]->Update();
// Generate the textures.
int texture_count = texture_layout.GetNumTextures();
for (int i = prior_num_textures; i < texture_count; ++i)
{
Texture* texture = new Texture();
if (!texture->Load(String(64, "?font::%p/%p/%d/%p", handle, effect, i, texture_layout.GetTexture(i))))
{
delete texture;
return false;
}
textures.push_back(texture);
}
return true;
}