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#include <mbgl/renderer/image_manager.hpp>
#include <mbgl/util/logging.hpp>
#include <mbgl/gl/context.hpp>
namespace mbgl {
void ImageManager::onSpriteLoaded() {
loaded = true;
for (const auto& entry : requestors) {
notify(*entry.first, entry.second);
}
requestors.clear();
}
void ImageManager::addImage(Immutable<style::Image::Impl> image_) {
assert(images.find(image_->id) == images.end());
images.emplace(image_->id, std::move(image_));
}
void ImageManager::updateImage(Immutable<style::Image::Impl> image_) {
removeImage(image_->id);
addImage(std::move(image_));
}
void ImageManager::removeImage(const std::string& id) {
assert(images.find(id) != images.end());
images.erase(id);
auto it = patterns.find(id);
if (it != patterns.end()) {
shelfPack.unref(*it->second.bin);
patterns.erase(it);
}
}
const style::Image::Impl* ImageManager::getImage(const std::string& id) const {
const auto it = images.find(id);
if (it != images.end()) {
return it->second.get();
}
return nullptr;
}
void ImageManager::getImages(ImageRequestor& requestor, ImageDependencies dependencies) {
// If the sprite has been loaded, or if all the icon dependencies are already present
// (i.e. if they've been addeded via runtime styling), then notify the requestor immediately.
// Otherwise, delay notification until the sprite is loaded. At that point, if any of the
// dependencies are still unavailable, we'll just assume they are permanently missing.
bool hasAllDependencies = true;
if (!isLoaded()) {
for (const auto& dependency : dependencies) {
if (images.find(dependency) == images.end()) {
hasAllDependencies = false;
}
}
}
if (isLoaded() || hasAllDependencies) {
notify(requestor, dependencies);
} else {
requestors.emplace(&requestor, std::move(dependencies));
}
}
void ImageManager::removeRequestor(ImageRequestor& requestor) {
requestors.erase(&requestor);
}
void ImageManager::notify(ImageRequestor& requestor, const ImageDependencies& dependencies) const {
ImageMap response;
for (const auto& dependency : dependencies) {
auto it = images.find(dependency);
if (it != images.end()) {
response.emplace(*it);
}
}
requestor.onImagesAvailable(response);
}
void ImageManager::dumpDebugLogs() const {
Log::Info(Event::General, "ImageManager::loaded: %d", loaded);
}
// When copied into the atlas texture, image data is padded by one pixel on each side. Icon
// images are padded with fully transparent pixels, while pattern images are padded with a
// copy of the image data wrapped from the opposite side. In both cases, this ensures the
// correct behavior of GL_LINEAR texture sampling mode.
static constexpr uint16_t padding = 1;
static mapbox::ShelfPack::ShelfPackOptions shelfPackOptions() {
mapbox::ShelfPack::ShelfPackOptions options;
options.autoResize = true;
return options;
}
ImageManager::ImageManager()
: shelfPack(64, 64, shelfPackOptions()) {
}
ImageManager::~ImageManager() = default;
optional<ImagePosition> ImageManager::getPattern(const std::string& id) {
auto it = patterns.find(id);
if (it != patterns.end()) {
return it->second.position;
}
const style::Image::Impl* image = getImage(id);
if (!image) {
return {};
}
const uint16_t width = image->image.size.width + padding * 2;
const uint16_t height = image->image.size.height + padding * 2;
mapbox::Bin* bin = shelfPack.packOne(-1, width, height);
if (!bin) {
return {};
}
atlasImage.resize(getPixelSize());
const PremultipliedImage& src = image->image;
const uint32_t x = bin->x + padding;
const uint32_t y = bin->y + padding;
const uint32_t w = src.size.width;
const uint32_t h = src.size.height;
PremultipliedImage::copy(src, atlasImage, { 0, 0 }, { x, y }, { w, h });
// Add 1 pixel wrapped padding on each side of the image.
PremultipliedImage::copy(src, atlasImage, { 0, h - 1 }, { x, y - 1 }, { w, 1 }); // T
PremultipliedImage::copy(src, atlasImage, { 0, 0 }, { x, y + h }, { w, 1 }); // B
PremultipliedImage::copy(src, atlasImage, { w - 1, 0 }, { x - 1, y }, { 1, h }); // L
PremultipliedImage::copy(src, atlasImage, { 0, 0 }, { x + w, y }, { 1, h }); // R
dirty = true;
return patterns.emplace(id, Pattern { bin, { *bin, *image } }).first->second.position;
}
Size ImageManager::getPixelSize() const {
return Size {
static_cast<uint32_t>(shelfPack.width()),
static_cast<uint32_t>(shelfPack.height())
};
}
void ImageManager::upload(gl::Context& context, gl::TextureUnit unit) {
if (!atlasTexture) {
atlasTexture = context.createTexture(atlasImage, unit);
} else if (dirty) {
context.updateTexture(*atlasTexture, atlasImage, unit);
}
dirty = false;
}
void ImageManager::bind(gl::Context& context, gl::TextureUnit unit) {
upload(context, unit);
context.bindTexture(*atlasTexture, unit, gl::TextureFilter::Linear);
}
} // namespace mbgl
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