29428dce42
Co-authored-by: Bart Louwers <bart@emeel.net> Co-authored-by: Bart Louwers <bart.louwers@gmail.com>
67 lines
2.7 KiB
C++
67 lines
2.7 KiB
C++
#include <mbgl/renderer/layers/hillshade_prepare_layer_tweaker.hpp>
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#include <mbgl/gfx/context.hpp>
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#include <mbgl/gfx/drawable.hpp>
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#include <mbgl/gfx/hillshade_prepare_drawable_data.hpp>
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#include <mbgl/renderer/layer_group.hpp>
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#include <mbgl/renderer/paint_parameters.hpp>
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#include <mbgl/renderer/render_tree.hpp>
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#include <mbgl/shaders/hillshade_prepare_layer_ubo.hpp>
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#include <mbgl/style/layers/hillshade_layer_properties.hpp>
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#include <mbgl/util/convert.hpp>
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namespace mbgl {
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using namespace style;
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using namespace shaders;
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namespace {
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// https://www.mapbox.com/help/access-elevation-data/#mapbox-terrain-rgb
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constexpr std::array<float, 4> unpackMapbox = {{6553.6f, 25.6f, 0.1f, 10000.0f}};
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// https://aws.amazon.com/public-datasets/terrain/
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constexpr std::array<float, 4> unpackTerrarium = {{256.0f, 1.0f, 1.0f / 256.0f, 32768.0f}};
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constexpr const std::array<float, 4>& getUnpackVector(const Tileset::RasterEncoding encoding) {
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return (encoding == Tileset::RasterEncoding::Terrarium) ? unpackTerrarium : unpackMapbox;
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}
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} // namespace
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void HillshadePrepareLayerTweaker::execute(LayerGroupBase& layerGroup, const PaintParameters& parameters) {
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if (layerGroup.empty()) {
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return;
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}
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#if !defined(NDEBUG)
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const auto label = layerGroup.getName() + "-update-uniforms";
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const auto debugGroup = parameters.encoder->createDebugGroup(label.c_str());
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#endif
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propertiesUpdated = false;
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visitLayerGroupDrawables(layerGroup, [&](gfx::Drawable& drawable) {
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if (!drawable.getTileID() || !drawable.getData() || !checkTweakDrawable(drawable)) {
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return;
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}
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const UnwrappedTileID tileID = drawable.getTileID()->toUnwrapped();
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const auto& drawableData = static_cast<const gfx::HillshadePrepareDrawableData&>(*drawable.getData());
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mat4 matrix;
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matrix::ortho(matrix, 0, util::EXTENT, -util::EXTENT, 0, -1, 1);
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matrix::translate(matrix, matrix, 0, -util::EXTENT, 0);
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const HillshadePrepareDrawableUBO drawableUBO = {/* .matrix = */ util::cast<float>(matrix)};
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const HillshadePrepareTilePropsUBO tilePropsUBO = {
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.unpack = getUnpackVector(drawableData.encoding),
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.dimension = {static_cast<float>(drawableData.stride), static_cast<float>(drawableData.stride)},
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.zoom = static_cast<float>(tileID.canonical.z),
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.maxzoom = static_cast<float>(drawableData.maxzoom)};
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auto& drawableUniforms = drawable.mutableUniformBuffers();
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drawableUniforms.createOrUpdate(idHillshadePrepareDrawableUBO, &drawableUBO, parameters.context);
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drawableUniforms.createOrUpdate(idHillshadePrepareTilePropsUBO, &tilePropsUBO, parameters.context);
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});
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}
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} // namespace mbgl
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