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#include <mbgl/renderer/painter.hpp>
#include <mbgl/renderer/paint_parameters.hpp>
#include <mbgl/renderer/symbol_bucket.hpp>
#include <mbgl/renderer/render_tile.hpp>
#include <mbgl/style/layers/symbol_layer.hpp>
#include <mbgl/style/layers/symbol_layer_impl.hpp>
#include <mbgl/text/glyph_atlas.hpp>
#include <mbgl/sprite/sprite_atlas.hpp>
#include <mbgl/programs/programs.hpp>
#include <mbgl/programs/symbol_program.hpp>
#include <mbgl/programs/collision_box_program.hpp>
#include <mbgl/util/math.hpp>
#include <mbgl/tile/tile.hpp>
#include <cmath>
namespace mbgl {
using namespace style;
void Painter::renderSymbol(PaintParameters& parameters,
SymbolBucket& bucket,
const SymbolLayer& layer,
const RenderTile& tile) {
if (pass == RenderPass::Opaque) {
return;
}
const auto& layout = bucket.layout;
frameHistory.bind(context, 1);
auto draw = [&] (auto& program,
auto&& uniformValues,
const auto& buffers,
const SymbolPropertyValues& values_)
{
// In some cases, we disable the stencil test so that labels aren't clipped
// to tile boundaries.
//
// Layers with features that may be drawn overlapping aren't clipped. These
// layers are sorted in the y direction, and to draw the correct ordering near
// tile edges the icons are included in both tiles and clipped when drawing.
//
// TODO remove the `true ||` when #1673 is implemented
const bool drawAcrossEdges = (frame.mapMode == MapMode::Continuous) && (true || !(layout.textAllowOverlap || layout.iconAllowOverlap ||
layout.textIgnorePlacement || layout.iconIgnorePlacement));
context.draw({
values_.pitchAlignment == AlignmentType::Map
? depthModeForSublayer(0, gl::DepthMode::ReadOnly)
: gl::DepthMode::disabled(),
drawAcrossEdges
? gl::StencilMode::disabled()
: stencilModeForClipping(tile.clip),
colorModeForRenderPass(),
program,
std::move(uniformValues),
gl::Segmented<gl::Triangles>(
*buffers.vertexBuffer,
*buffers.indexBuffer,
buffers.segments
)
});
};
if (bucket.hasIconData()) {
auto values = layer.impl->iconPropertyValues(layout);
SpriteAtlas& atlas = *layer.impl->spriteAtlas;
const bool iconScaled = values.paintSize != 1.0f || frame.pixelRatio != atlas.getPixelRatio() || bucket.iconsNeedLinear;
const bool iconTransformed = values.rotationAlignment == AlignmentType::Map || state.getPitch() != 0;
atlas.bind(bucket.sdfIcons || state.isChanging() || iconScaled || iconTransformed, context, 0);
const Size texsize = atlas.getSize();
if (bucket.sdfIcons) {
if (values.hasHalo()) {
draw(parameters.programs.symbolIconSDF,
SymbolSDFProgram::haloUniformValues(values, texsize, pixelsToGLUnits, tile, state, frame.pixelRatio),
bucket.icon,
values);
}
if (values.hasForeground()) {
draw(parameters.programs.symbolIconSDF,
SymbolSDFProgram::foregroundUniformValues(values, texsize, pixelsToGLUnits, tile, state, frame.pixelRatio),
bucket.icon,
values);
}
} else {
draw(parameters.programs.symbolIcon,
SymbolIconProgram::uniformValues(values, texsize, pixelsToGLUnits, tile, state),
bucket.icon,
values);
}
}
if (bucket.hasTextData()) {
glyphAtlas->bind(context, 0);
auto values = layer.impl->textPropertyValues(layout);
const Size texsize = glyphAtlas->getSize();
if (values.hasHalo()) {
draw(parameters.programs.symbolGlyph,
SymbolSDFProgram::haloUniformValues(values, texsize, pixelsToGLUnits, tile, state, frame.pixelRatio),
bucket.text,
values);
}
if (values.hasForeground()) {
draw(parameters.programs.symbolGlyph,
SymbolSDFProgram::foregroundUniformValues(values, texsize, pixelsToGLUnits, tile, state, frame.pixelRatio),
bucket.text,
values);
}
}
if (bucket.hasCollisionBoxData()) {
context.draw({
gl::DepthMode::disabled(),
gl::StencilMode::disabled(),
colorModeForRenderPass(),
programs->collisionBox,
CollisionBoxProgram::UniformValues {
uniforms::u_matrix::Value{ tile.matrix },
uniforms::u_scale::Value{ std::pow(2.0f, float(state.getZoom() - tile.tile.id.overscaledZ)) },
uniforms::u_zoom::Value{ float(state.getZoom() * 10) },
uniforms::u_maxzoom::Value{ float((tile.id.canonical.z + 1) * 10) },
},
gl::Unindexed<gl::Lines>(
*bucket.collisionBox.vertexBuffer,
1.0f
)
});
}
}
} // namespace mbgl
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