diff options
Diffstat (limited to 'src/mbgl/renderer/buckets/hillshade_bucket.cpp')
-rw-r--r-- | src/mbgl/renderer/buckets/hillshade_bucket.cpp | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/src/mbgl/renderer/buckets/hillshade_bucket.cpp b/src/mbgl/renderer/buckets/hillshade_bucket.cpp new file mode 100644 index 0000000000..8011681ee0 --- /dev/null +++ b/src/mbgl/renderer/buckets/hillshade_bucket.cpp @@ -0,0 +1,113 @@ +#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/gl/context.hpp> + +namespace mbgl { + +using namespace style; + +HillshadeBucket::HillshadeBucket(PremultipliedImage&& image_): demdata(image_) { +} + +HillshadeBucket::HillshadeBucket(DEMData&& demdata_) : demdata(std::move(demdata_)) { +} + +const DEMData& HillshadeBucket::getDEMData() const { + return demdata; +} + +DEMData& HillshadeBucket::getDEMData() { + return demdata; +} + +void HillshadeBucket::upload(gl::Context& context) { + if (!hasData()) { + return; + } + + + const PremultipliedImage* image = demdata.getImage(); + dem = context.createTexture(*image); + + if (!segments.empty()) { + vertexBuffer = context.createVertexBuffer(std::move(vertices)); + indexBuffer = context.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.vertexSize(), indices.indexSize()); + } + + 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(); +} + +} // namespace mbgl |