46 lines
2.2 KiB
C++
46 lines
2.2 KiB
C++
#include <mbgl/programs/background_program.hpp>
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#include <mbgl/renderer/image_atlas.hpp>
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#include <mbgl/renderer/cross_faded_property_evaluator.hpp>
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#include <mbgl/tile/tile_id.hpp>
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#include <mbgl/map/transform_state.hpp>
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namespace mbgl {
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using namespace style;
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static_assert(sizeof(BackgroundLayoutVertex) == 4, "expected BackgroundLayoutVertex size");
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BackgroundPatternProgram::LayoutUniformValues
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BackgroundPatternProgram::layoutUniformValues(mat4 matrix,
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float opacity,
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Size atlasSize,
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const ImagePosition& a,
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const ImagePosition& b,
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const CrossfadeParameters& fading,
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const UnwrappedTileID& tileID,
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const TransformState& state) {
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int32_t tileSizeAtNearestZoom = util::tileSize * state.zoomScale(state.getIntegerZoom() - tileID.canonical.z);
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int32_t pixelX = tileSizeAtNearestZoom * (tileID.canonical.x + tileID.wrap * state.zoomScale(tileID.canonical.z));
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int32_t pixelY = tileSizeAtNearestZoom * tileID.canonical.y;
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return {
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uniforms::matrix::Value( matrix ),
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uniforms::opacity::Value( opacity ),
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uniforms::texsize::Value( atlasSize ),
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uniforms::pattern_tl_a::Value( a.tl() ),
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uniforms::pattern_br_a::Value( a.br() ),
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uniforms::pattern_tl_b::Value( b.tl() ),
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uniforms::pattern_br_b::Value( b.br() ),
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uniforms::pattern_size_a::Value( a.displaySize() ),
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uniforms::pattern_size_b::Value( b.displaySize() ),
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uniforms::scale_a::Value( fading.fromScale ),
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uniforms::scale_b::Value( fading.toScale ),
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uniforms::mix::Value( fading.t ),
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uniforms::pixel_coord_upper::Value( std::array<float, 2> {{ float(pixelX >> 16), float(pixelY >> 16) }}),
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uniforms::pixel_coord_lower::Value( std::array<float, 2> {{ float(pixelX & 0xFFFF), float(pixelY & 0xFFFF)}}),
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uniforms::tile_units_to_pixels::Value( 1.0f / tileID.pixelsToTileUnits(1.0f, state.getIntegerZoom()) ),
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};
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}
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} // namespace mbgl
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