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#include <mbgl/renderer/layers/render_fill_extrusion_layer.hpp>
#include <mbgl/renderer/buckets/fill_extrusion_bucket.hpp>
#include <mbgl/renderer/render_tile.hpp>
#include <mbgl/renderer/paint_parameters.hpp>
#include <mbgl/renderer/image_manager.hpp>
#include <mbgl/renderer/render_static_data.hpp>
#include <mbgl/programs/programs.hpp>
#include <mbgl/programs/fill_extrusion_program.hpp>
#include <mbgl/tile/tile.hpp>
#include <mbgl/style/layers/fill_extrusion_layer_impl.hpp>
#include <mbgl/geometry/feature_index.hpp>
#include <mbgl/util/math.hpp>
#include <mbgl/util/intersection_tests.hpp>
#include <mbgl/tile/geometry_tile.hpp>
#include <mbgl/gfx/renderer_backend.hpp>
#include <mbgl/gfx/render_pass.hpp>
#include <mbgl/gfx/cull_face_mode.hpp>
namespace mbgl {
using namespace style;
inline const FillExtrusionLayer::Impl& impl(const Immutable<style::Layer::Impl>& impl) {
return static_cast<const FillExtrusionLayer::Impl&>(*impl);
}
RenderFillExtrusionLayer::RenderFillExtrusionLayer(Immutable<style::FillExtrusionLayer::Impl> _impl)
: RenderLayer(makeMutable<FillExtrusionLayerProperties>(std::move(_impl))),
unevaluated(impl(baseImpl).paint.untransitioned()) {
}
RenderFillExtrusionLayer::~RenderFillExtrusionLayer() = default;
void RenderFillExtrusionLayer::transition(const TransitionParameters& parameters) {
unevaluated = impl(baseImpl).paint.transitioned(parameters, std::move(unevaluated));
}
void RenderFillExtrusionLayer::evaluate(const PropertyEvaluationParameters& parameters) {
auto properties = makeMutable<FillExtrusionLayerProperties>(
staticImmutableCast<FillExtrusionLayer::Impl>(baseImpl),
parameters.getCrossfadeParameters(),
unevaluated.evaluate(parameters));
passes = (properties->evaluated.get<style::FillExtrusionOpacity>() > 0)
? (RenderPass::Translucent | RenderPass::Pass3D)
: RenderPass::None;
evaluatedProperties = std::move(properties);
}
bool RenderFillExtrusionLayer::hasTransition() const {
return unevaluated.hasTransition();
}
bool RenderFillExtrusionLayer::hasCrossfade() const {
return getCrossfade<FillExtrusionLayerProperties>(evaluatedProperties).t != 1;
}
void RenderFillExtrusionLayer::render(PaintParameters& parameters) {
if (parameters.pass != RenderPass::Translucent) {
return;
}
const auto& evaluated = static_cast<const FillExtrusionLayerProperties&>(*evaluatedProperties).evaluated;
const auto& crossfade = static_cast<const FillExtrusionLayerProperties&>(*evaluatedProperties).crossfade;
if (evaluated.get<FillExtrusionOpacity>() == 0) {
return;
}
const auto depthMode = parameters.depthModeFor3D();
auto draw = [&](auto& programInstance,
const auto& evaluated_,
const auto& crossfade_,
const gfx::StencilMode& stencilMode,
const gfx::ColorMode& colorMode,
const auto& tileBucket,
const auto& uniformValues,
const optional<ImagePosition>& patternPositionA,
const optional<ImagePosition>& patternPositionB,
const auto& textureBindings,
const std::string& uniqueName) {
const auto& paintPropertyBinders = tileBucket.paintPropertyBinders.at(getID());
paintPropertyBinders.setPatternParameters(patternPositionA, patternPositionB, crossfade_);
const auto allUniformValues = programInstance.computeAllUniformValues(
uniformValues,
paintPropertyBinders,
evaluated_,
parameters.state.getZoom()
);
const auto allAttributeBindings = programInstance.computeAllAttributeBindings(
*tileBucket.vertexBuffer,
paintPropertyBinders,
evaluated_
);
checkRenderability(parameters, programInstance.activeBindingCount(allAttributeBindings));
programInstance.draw(
parameters.context,
*parameters.renderPass,
gfx::Triangles(),
depthMode,
stencilMode,
colorMode,
gfx::CullFaceMode::backCCW(),
*tileBucket.indexBuffer,
tileBucket.triangleSegments,
allUniformValues,
allAttributeBindings,
textureBindings,
getID() + "/" + uniqueName);
};
if (unevaluated.get<FillExtrusionPattern>().isUndefined()) {
// Draw solid color extrusions
auto drawTiles = [&](const gfx::StencilMode& stencilMode_, const gfx::ColorMode& colorMode_, const std::string& name) {
for (const RenderTile& tile : renderTiles) {
const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl);
if (!renderData) {
continue;
}
auto& bucket = static_cast<FillExtrusionBucket&>(*renderData->bucket);
draw(
parameters.programs.getFillExtrusionLayerPrograms().fillExtrusion,
evaluated,
crossfade,
stencilMode_,
colorMode_,
bucket,
FillExtrusionProgram::layoutUniformValues(
tile.translatedClipMatrix(evaluated.get<FillExtrusionTranslate>(),
evaluated.get<FillExtrusionTranslateAnchor>(),
parameters.state),
parameters.state,
evaluated.get<FillExtrusionOpacity>(),
parameters.evaluatedLight,
evaluated.get<FillExtrusionVerticalGradient>()
),
{},
{},
FillExtrusionProgram::TextureBindings{},
name
);
}
};
if (evaluated.get<FillExtrusionOpacity>() == 1) {
// Draw opaque extrusions
drawTiles(gfx::StencilMode::disabled(), parameters.colorModeForRenderPass(), "color");
} else {
// Draw transparent buildings in two passes so that only the closest surface is drawn.
// First draw all the extrusions into only the depth buffer. No colors are drawn.
drawTiles(gfx::StencilMode::disabled(), gfx::ColorMode::disabled(), "depth");
// Then draw all the extrusions a second time, only coloring fragments if they have the
// same depth value as the closest fragment in the previous pass. Use the stencil buffer
// to prevent the second draw in cases where we have coincident polygons.
drawTiles(parameters.stencilModeFor3D(), parameters.colorModeForRenderPass(), "color");
}
} else {
// Draw textured extrusions
const auto fillPatternValue = evaluated.get<FillExtrusionPattern>().constantOr(mbgl::Faded<std::basic_string<char> >{"", ""});
auto drawTiles = [&](const gfx::StencilMode& stencilMode_, const gfx::ColorMode& colorMode_, const std::string& name) {
for (const RenderTile& tile : renderTiles) {
const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl);
if (!renderData) {
continue;
}
auto& bucket = static_cast<FillExtrusionBucket&>(*renderData->bucket);
optional<ImagePosition> patternPosA = tile.getPattern(fillPatternValue.from);
optional<ImagePosition> patternPosB = tile.getPattern(fillPatternValue.to);
draw(
parameters.programs.getFillExtrusionLayerPrograms().fillExtrusionPattern,
evaluated,
crossfade,
stencilMode_,
colorMode_,
bucket,
FillExtrusionPatternProgram::layoutUniformValues(
tile.translatedClipMatrix(evaluated.get<FillExtrusionTranslate>(),
evaluated.get<FillExtrusionTranslateAnchor>(),
parameters.state),
tile.getIconAtlasTexture().size,
crossfade,
tile.id,
parameters.state,
evaluated.get<FillExtrusionOpacity>(),
-std::pow(2, tile.id.canonical.z) / util::tileSize / 8.0f,
parameters.pixelRatio,
parameters.evaluatedLight,
evaluated.get<FillExtrusionVerticalGradient>()
),
patternPosA,
patternPosB,
FillExtrusionPatternProgram::TextureBindings{
textures::image::Value{ tile.getIconAtlasTexture().getResource(), gfx::TextureFilterType::Linear },
},
name
);
}
};
// Draw transparent buildings in two passes so that only the closest surface is drawn.
// First draw all the extrusions into only the depth buffer. No colors are drawn.
drawTiles(gfx::StencilMode::disabled(), gfx::ColorMode::disabled(), "depth");
// Then draw all the extrusions a second time, only coloring fragments if they have the
// same depth value as the closest fragment in the previous pass. Use the stencil buffer
// to prevent the second draw in cases where we have coincident polygons.
drawTiles(parameters.stencilModeFor3D(), parameters.colorModeForRenderPass(), "color");
}
}
bool RenderFillExtrusionLayer::queryIntersectsFeature(
const GeometryCoordinates& queryGeometry,
const GeometryTileFeature& feature,
const float,
const TransformState& transformState,
const float pixelsToTileUnits,
const mat4&) const {
const auto& evaluated = static_cast<const FillExtrusionLayerProperties&>(*evaluatedProperties).evaluated;
auto translatedQueryGeometry = FeatureIndex::translateQueryGeometry(
queryGeometry,
evaluated.get<style::FillExtrusionTranslate>(),
evaluated.get<style::FillExtrusionTranslateAnchor>(),
transformState.getBearing(),
pixelsToTileUnits);
return util::polygonIntersectsMultiPolygon(translatedQueryGeometry.value_or(queryGeometry), feature.getGeometries());
}
} // namespace mbgl
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