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#include <mbgl/renderer/buckets/hillshade_bucket.hpp>
#include <mbgl/renderer/layers/render_hillshade_layer.hpp>
#include <mbgl/programs/hillshade_program.hpp>
#include <mbgl/programs/hillshade_prepare_program.hpp>
#include <mbgl/gfx/context.hpp>
namespace mbgl {
using namespace style;
HillshadeBucket::HillshadeBucket(PremultipliedImage&& image_, Tileset::DEMEncoding encoding)
: demdata(image_, encoding) {
}
HillshadeBucket::HillshadeBucket(DEMData&& demdata_)
: demdata(std::move(demdata_)) {
}
HillshadeBucket::~HillshadeBucket() = default;
const DEMData& HillshadeBucket::getDEMData() const {
return demdata;
}
DEMData& HillshadeBucket::getDEMData() {
return demdata;
}
void HillshadeBucket::upload(gfx::UploadPass& uploadPass) {
if (!hasData()) {
return;
}
const PremultipliedImage* image = demdata.getImage();
dem = uploadPass.createTexture(*image);
if (!segments.empty()) {
vertexBuffer = uploadPass.createVertexBuffer(std::move(vertices));
indexBuffer = uploadPass.createIndexBuffer(std::move(indices));
}
uploaded = true;
}
void HillshadeBucket::clear() {
vertexBuffer = {};
indexBuffer = {};
segments.clear();
vertices.clear();
indices.clear();
uploaded = false;
}
void HillshadeBucket::setMask(TileMask&& mask_) {
if (mask == mask_) {
return;
}
mask = std::move(mask_);
clear();
if (mask == TileMask{ { 0, 0, 0 } }) {
// We want to render the full tile, and keeping the segments/vertices/indices empty means
// using the global shared buffers for covering the entire tile.
return;
}
// Create a new segment so that we will upload (empty) buffers even when there is nothing to
// draw for this tile.
segments.emplace_back(0, 0);
constexpr const uint16_t vertexLength = 4;
// Create the vertex buffer for the specified tile mask.
for (const auto& id : mask) {
// Create a quad for every masked tile.
const int32_t vertexExtent = util::EXTENT >> id.z;
const Point<int16_t> tlVertex = { static_cast<int16_t>(id.x * vertexExtent),
static_cast<int16_t>(id.y * vertexExtent) };
const Point<int16_t> brVertex = { static_cast<int16_t>(tlVertex.x + vertexExtent),
static_cast<int16_t>(tlVertex.y + vertexExtent) };
if (segments.back().vertexLength + vertexLength > std::numeric_limits<uint16_t>::max()) {
// Move to a new segments because the old one can't hold the geometry.
segments.emplace_back(vertices.elements(), indices.elements());
}
vertices.emplace_back(
HillshadeProgram::layoutVertex({ tlVertex.x, tlVertex.y }, { static_cast<uint16_t>(tlVertex.x), static_cast<uint16_t>(tlVertex.y) }));
vertices.emplace_back(
HillshadeProgram::layoutVertex({ brVertex.x, tlVertex.y }, { static_cast<uint16_t>(brVertex.x), static_cast<uint16_t>(tlVertex.y) }));
vertices.emplace_back(
HillshadeProgram::layoutVertex({ tlVertex.x, brVertex.y }, { static_cast<uint16_t>(tlVertex.x), static_cast<uint16_t>(brVertex.y) }));
vertices.emplace_back(
HillshadeProgram::layoutVertex({ brVertex.x, brVertex.y }, { static_cast<uint16_t>(brVertex.x), static_cast<uint16_t>(brVertex.y) }));
auto& segment = segments.back();
assert(segment.vertexLength <= std::numeric_limits<uint16_t>::max());
const uint16_t offset = segment.vertexLength;
// 0, 1, 2
// 1, 2, 3
indices.emplace_back(offset, offset + 1, offset + 2);
indices.emplace_back(offset + 1, offset + 2, offset + 3);
segment.vertexLength += vertexLength;
segment.indexLength += 6;
}
}
bool HillshadeBucket::hasData() const {
return demdata.getImage()->valid();
}
bool HillshadeBucket::supportsLayer(const style::Layer::Impl& impl) const {
return style::HillshadeLayer::Impl::staticTypeInfo() == impl.getTypeInfo();
}
} // namespace mbgl
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