LUMIX_RENDERER_API IPlugin* createPlugin(Engine& engine)
{
RendererImpl* r = LUMIX_NEW(engine.getAllocator(), RendererImpl)(engine);
if (r->create())
{
return r;
}
LUMIX_DELETE(engine.getAllocator(), r);
return nullptr;
}
LUMIX_RENDERER_API IPlugin* createPlugin(Engine& engine)
{
RendererImpl* r = engine.getAllocator().newObject<RendererImpl>(engine);
if (r->create())
{
return r;
}
engine.getAllocator().deleteObject(r);
return nullptr;
}
ImagePtr generateAtlas(RendererImpl& rendererImpl, const std::string& filePath,
uint32_t letterSize, Letters& letters) {
static const auto kBorderWidth = 1u, kBorderSize = kBorderWidth * 2;
static const auto kSpaceFactor = 0.7f;
Context context;
if (!context.loadFont(filePath, letterSize))
return ImagePtr();
auto width = 0, height = 0, heightOffset = 0;
auto x = (double)kBorderWidth, y = 0.0;
for (auto c : getAlphabet()) {
auto glyph = context.getGlyph(c);
if (!glyph)
continue;
if (c != kSpaceSymbol) {
height = std::max<int32_t>(height, glyph->bounds.y2 - glyph->bounds.y1);
heightOffset = std::min(heightOffset, glyph->bounds.y1);
}
x += (c == kSpaceSymbol ? kSpaceFactor : 1.0f) * glyph->advance_x + kBorderSize;
}
width = (int32_t)ceil(x);
height += -heightOffset + kBorderSize;
x = kBorderWidth;
y = -heightOffset + kBorderWidth;
letters.clear();
Renderer renderer((uint32_t)width, (uint32_t)height);
for (auto c : getAlphabet()) {
auto glyph = context.getGlyph(c);
if (!glyph)
continue;
if (c != kSpaceSymbol)
context.renderGlyph(renderer, glyph, x, y);
auto w = (c == kSpaceSymbol ? kSpaceFactor : 1.0f) *
std::max(glyph->advance_x, (double)(glyph->bounds.x2 - glyph->bounds.x1));
letters[c] = Rect((int32_t)x, 0, (int32_t)(x + w), height);
x += w + kBorderSize;
}
auto atlas = rendererImpl.makeImage(
{(uint32_t)width, (uint32_t)height}, Image::Format::A, true);
atlas->upload(Image::Bytes(renderer.data(), renderer.size()));
return atlas;
}