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-rw-r--r--src/mbgl/programs/fill_extrusion_program.hpp129
1 files changed, 129 insertions, 0 deletions
diff --git a/src/mbgl/programs/fill_extrusion_program.hpp b/src/mbgl/programs/fill_extrusion_program.hpp
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+++ b/src/mbgl/programs/fill_extrusion_program.hpp
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+#pragma once
+
+#include <mbgl/programs/program.hpp>
+#include <mbgl/programs/attributes.hpp>
+#include <mbgl/programs/uniforms.hpp>
+#include <mbgl/shaders/fill_extrusion.hpp>
+#include <mbgl/shaders/fill_extrusion_pattern.hpp>
+#include <mbgl/util/geometry.hpp>
+#include <mbgl/util/mat4.hpp>
+#include <mbgl/util/size.hpp>
+#include <mbgl/style/layers/fill_extrusion_layer_properties.hpp>
+#include <mbgl/style/style.hpp>
+#include <mbgl/style/light_impl.hpp>
+
+#include <string>
+
+namespace mbgl {
+
+class SpriteAtlasElement;
+class UnwrappedTileID;
+class TransformState;
+
+namespace style {
+template <class> class Faded;
+} // namespace style
+
+namespace uniforms {
+MBGL_DEFINE_UNIFORM_VECTOR(float, 3, u_lightpos);
+MBGL_DEFINE_UNIFORM_VECTOR(float, 3, u_lightcolor);
+MBGL_DEFINE_UNIFORM_SCALAR(float, u_lightintensity);
+MBGL_DEFINE_UNIFORM_SCALAR(float, u_height_factor);
+} // namespace uniforms
+
+struct FillExtrusionLayoutAttributes : gl::Attributes<
+ attributes::a_pos,
+ attributes::a_normal,
+ attributes::a_edgedistance>
+{};
+
+struct FillExtrusionUniforms : gl::Uniforms<
+ uniforms::u_matrix,
+ uniforms::u_lightcolor,
+ uniforms::u_lightpos,
+ uniforms::u_lightintensity>
+{
+ static Values values(mat4,
+ const TransformState&,
+ const style::EvaluatedLight&);
+};
+
+struct FillExtrusionPatternUniforms : gl::Uniforms<
+ uniforms::u_matrix,
+ uniforms::u_pattern_tl_a,
+ uniforms::u_pattern_br_a,
+ uniforms::u_pattern_tl_b,
+ uniforms::u_pattern_br_b,
+ uniforms::u_pattern_size_a,
+ uniforms::u_pattern_size_b,
+ uniforms::u_scale_a,
+ uniforms::u_scale_b,
+ uniforms::u_mix,
+ uniforms::u_image,
+ uniforms::u_pixel_coord_upper,
+ uniforms::u_pixel_coord_lower,
+ uniforms::u_tile_units_to_pixels,
+ uniforms::u_height_factor,
+ uniforms::u_lightcolor,
+ uniforms::u_lightpos,
+ uniforms::u_lightintensity>
+{
+ static Values values(mat4,
+ const SpriteAtlasElement&,
+ const SpriteAtlasElement&,
+ const style::Faded<std::string>&,
+ const UnwrappedTileID&,
+ const TransformState&,
+ const float,
+ const style::EvaluatedLight&);
+};
+
+class FillExtrusionProgram : public Program<
+ shaders::fill_extrusion,
+ gl::Triangle,
+ FillExtrusionLayoutAttributes,
+ FillExtrusionUniforms,
+ style::FillExtrusionPaintProperties>
+{
+public:
+ using Program::Program;
+
+ static LayoutVertex layoutVertex(Point<int16_t> p, double nx, double ny, double nz, unsigned short t, uint16_t e) {
+ const auto factor = pow(2, 13);
+
+ return LayoutVertex {
+ {{
+ p.x,
+ p.y
+ }},
+ {{
+ // Multiply normal vector components by 2^14 to pack them into integers
+ // We pack a bool (`t`) into the x component indicating whether it is an upper or lower vertex
+ static_cast<int16_t>(floor(nx * factor) * 2 + t),
+ static_cast<int16_t>(ny * factor * 2),
+ static_cast<int16_t>(nz * factor * 2)
+
+ }},
+ {{
+ // The edgedistance attribute is used for wrapping fill_extrusion patterns
+ e
+ }}
+ };
+ }
+};
+
+class FillExtrusionPatternProgram : public Program<
+ shaders::fill_extrusion_pattern,
+ gl::Triangle,
+ FillExtrusionLayoutAttributes,
+ FillExtrusionPatternUniforms,
+ style::FillExtrusionPaintProperties>
+{
+public:
+ using Program::Program;
+};
+
+using FillExtrusionLayoutVertex = FillExtrusionProgram::LayoutVertex;
+using FillExtrusionAttributes = FillExtrusionProgram::Attributes;
+
+} // namespace mbgl