90 lines
3.2 KiB
C++
90 lines
3.2 KiB
C++
#pragma once
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#include <mbgl/gl/program.hpp>
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#include <mbgl/programs/program_parameters.hpp>
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#include <mbgl/programs/attributes.hpp>
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#include <mbgl/style/paint_property.hpp>
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#include <sstream>
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#include <cassert>
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namespace mbgl {
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template <class Shaders,
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class Primitive,
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class LayoutAttrs,
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class Uniforms,
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class PaintProperties>
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class Program {
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public:
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using LayoutAttributes = LayoutAttrs;
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using LayoutVertex = typename LayoutAttributes::Vertex;
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using PaintPropertyBinders = typename PaintProperties::Binders;
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using PaintAttributes = typename PaintPropertyBinders::Attributes;
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using Attributes = gl::ConcatenateAttributes<LayoutAttributes, PaintAttributes>;
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using UniformValues = typename Uniforms::Values;
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using PaintUniforms = typename PaintPropertyBinders::Uniforms;
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using AllUniforms = gl::ConcatenateUniforms<Uniforms, PaintUniforms>;
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using ProgramType = gl::Program<Primitive, Attributes, AllUniforms>;
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ProgramType program;
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Program(gl::Context& context, const ProgramParameters& programParameters)
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: program(context, vertexSource(programParameters), fragmentSource(programParameters))
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{}
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static std::string pixelRatioDefine(const ProgramParameters& parameters) {
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std::ostringstream pixelRatioSS;
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pixelRatioSS.imbue(std::locale("C"));
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pixelRatioSS.setf(std::ios_base::showpoint);
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pixelRatioSS << parameters.pixelRatio;
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return std::string("#define DEVICE_PIXEL_RATIO ") + pixelRatioSS.str() + "\n";
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}
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static std::string fragmentSource(const ProgramParameters& parameters) {
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std::string source = pixelRatioDefine(parameters) + Shaders::fragmentSource;
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if (parameters.overdraw) {
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assert(source.find("#ifdef OVERDRAW_INSPECTOR") != std::string::npos);
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source.replace(source.find_first_of('\n'), 1, "\n#define OVERDRAW_INSPECTOR\n");
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}
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return source;
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}
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static std::string vertexSource(const ProgramParameters& parameters) {
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return pixelRatioDefine(parameters) + Shaders::vertexSource;
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}
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template <class DrawMode>
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void draw(gl::Context& context,
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DrawMode drawMode,
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gl::DepthMode depthMode,
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gl::StencilMode stencilMode,
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gl::ColorMode colorMode,
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UniformValues&& uniformValues,
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const gl::VertexBuffer<LayoutVertex>& layoutVertexBuffer,
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const gl::IndexBuffer<DrawMode>& indexBuffer,
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const gl::SegmentVector<Attributes>& segments,
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const PaintPropertyBinders& paintPropertyBinders,
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const typename PaintProperties::Evaluated& currentProperties,
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float currentZoom) {
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program.draw(
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context,
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std::move(drawMode),
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std::move(depthMode),
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std::move(stencilMode),
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std::move(colorMode),
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uniformValues
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.concat(paintPropertyBinders.uniformValues(currentZoom)),
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LayoutAttributes::allVariableBindings(layoutVertexBuffer)
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.concat(paintPropertyBinders.attributeBindings(currentProperties)),
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indexBuffer,
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segments
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);
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}
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};
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} // namespace mbgl
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