129 lines
3.7 KiB
C++
129 lines
3.7 KiB
C++
#pragma once
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#include <mbgl/programs/program.hpp>
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#include <mbgl/programs/attributes.hpp>
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#include <mbgl/programs/uniforms.hpp>
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#include <mbgl/shaders/fill_extrusion.hpp>
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#include <mbgl/shaders/fill_extrusion_pattern.hpp>
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#include <mbgl/util/geometry.hpp>
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#include <mbgl/util/mat4.hpp>
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#include <mbgl/util/size.hpp>
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#include <mbgl/style/layers/fill_extrusion_layer_properties.hpp>
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#include <mbgl/style/style.hpp>
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#include <mbgl/renderer/render_light.hpp>
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#include <string>
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namespace mbgl {
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class ImagePosition;
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class UnwrappedTileID;
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class TransformState;
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template <class> class Faded;
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namespace uniforms {
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MBGL_DEFINE_UNIFORM_VECTOR(float, 3, u_lightpos);
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MBGL_DEFINE_UNIFORM_VECTOR(float, 3, u_lightcolor);
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MBGL_DEFINE_UNIFORM_SCALAR(float, u_lightintensity);
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MBGL_DEFINE_UNIFORM_SCALAR(float, u_height_factor);
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} // namespace uniforms
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struct FillExtrusionLayoutAttributes : gl::Attributes<
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attributes::a_pos,
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attributes::a_normal,
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attributes::a_edgedistance>
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{};
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struct FillExtrusionUniforms : gl::Uniforms<
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uniforms::u_matrix,
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uniforms::u_lightcolor,
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uniforms::u_lightpos,
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uniforms::u_lightintensity>
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{
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static Values values(mat4,
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const TransformState&,
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const EvaluatedLight&);
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};
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struct FillExtrusionPatternUniforms : gl::Uniforms<
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uniforms::u_matrix,
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uniforms::u_pattern_tl_a,
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uniforms::u_pattern_br_a,
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uniforms::u_pattern_tl_b,
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uniforms::u_pattern_br_b,
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uniforms::u_pattern_size_a,
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uniforms::u_pattern_size_b,
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uniforms::u_scale_a,
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uniforms::u_scale_b,
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uniforms::u_texsize,
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uniforms::u_mix,
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uniforms::u_image,
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uniforms::u_pixel_coord_upper,
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uniforms::u_pixel_coord_lower,
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uniforms::u_tile_units_to_pixels,
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uniforms::u_height_factor,
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uniforms::u_lightcolor,
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uniforms::u_lightpos,
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uniforms::u_lightintensity>
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{
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static Values values(mat4,
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Size atlasSize,
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const ImagePosition&,
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const ImagePosition&,
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const Faded<std::string>&,
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const UnwrappedTileID&,
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const TransformState&,
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const float,
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const EvaluatedLight&);
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};
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class FillExtrusionProgram : public Program<
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shaders::fill_extrusion,
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gl::Triangle,
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FillExtrusionLayoutAttributes,
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FillExtrusionUniforms,
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style::FillExtrusionPaintProperties>
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{
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public:
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using Program::Program;
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static LayoutVertex layoutVertex(Point<int16_t> p, double nx, double ny, double nz, unsigned short t, uint16_t e) {
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const auto factor = pow(2, 13);
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return LayoutVertex {
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{{
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p.x,
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p.y
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}},
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{{
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// Multiply normal vector components by 2^14 to pack them into integers
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// We pack a bool (`t`) into the x component indicating whether it is an upper or lower vertex
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static_cast<int16_t>(floor(nx * factor) * 2 + t),
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static_cast<int16_t>(ny * factor * 2),
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static_cast<int16_t>(nz * factor * 2)
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}},
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{{
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// The edgedistance attribute is used for wrapping fill_extrusion patterns
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e
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}}
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};
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}
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};
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class FillExtrusionPatternProgram : public Program<
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shaders::fill_extrusion_pattern,
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gl::Triangle,
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FillExtrusionLayoutAttributes,
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FillExtrusionPatternUniforms,
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style::FillExtrusionPaintProperties>
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{
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public:
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using Program::Program;
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};
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using FillExtrusionLayoutVertex = FillExtrusionProgram::LayoutVertex;
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using FillExtrusionAttributes = FillExtrusionProgram::Attributes;
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} // namespace mbgl
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