83 lines
2.6 KiB
C++
83 lines
2.6 KiB
C++
#include <mbgl/renderer/painter.hpp>
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#include <mbgl/renderer/paint_parameters.hpp>
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#include <mbgl/renderer/render_tile.hpp>
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#include <mbgl/gl/gl.hpp>
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#include <mbgl/renderer/raster_bucket.hpp>
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#include <mbgl/style/layers/raster_layer.hpp>
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#include <mbgl/style/layers/raster_layer_impl.hpp>
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#include <mbgl/shader/shaders.hpp>
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namespace mbgl {
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using namespace style;
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void Painter::renderRaster(PaintParameters& parameters,
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RasterBucket& bucket,
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const RasterLayer& layer,
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const RenderTile& tile) {
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if (pass != RenderPass::Translucent) return;
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const RasterPaintProperties& properties = layer.impl->paint;
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if (bucket.hasData()) {
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auto& rasterShader = parameters.shaders.raster;
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auto& rasterVAO = parameters.shaders.coveringRasterArray;
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context.program = rasterShader.getID();
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rasterShader.u_matrix = tile.matrix;
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rasterShader.u_buffer_scale = 1.0f;
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rasterShader.u_opacity0 = properties.rasterOpacity;
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rasterShader.u_opacity1 = 0;
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rasterShader.u_brightness_low = properties.rasterBrightnessMin;
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rasterShader.u_brightness_high = properties.rasterBrightnessMax;
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rasterShader.u_saturation_factor = saturationFactor(properties.rasterSaturation);
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rasterShader.u_contrast_factor = contrastFactor(properties.rasterContrast);
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rasterShader.u_spin_weights = spinWeights(properties.rasterHueRotate);
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context.stencilTest = false;
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rasterShader.u_image0 = 0; // GL_TEXTURE0
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rasterShader.u_image1 = 1; // GL_TEXTURE1
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rasterShader.u_tl_parent = {{ 0.0f, 0.0f }};
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rasterShader.u_scale_parent = 1.0f;
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context.depthFunc = gl::DepthTestFunction::LessEqual;
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context.depthTest = true;
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context.depthMask = false;
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setDepthSublayer(0);
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bucket.drawRaster(rasterShader, rasterVertexBuffer, rasterVAO, context);
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}
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}
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float Painter::saturationFactor(float saturation) {
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if (saturation > 0) {
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return 1 - 1 / (1.001 - saturation);
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} else {
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return -saturation;
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}
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}
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float Painter::contrastFactor(float contrast) {
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if (contrast > 0) {
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return 1 / (1 - contrast);
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} else {
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return 1 + contrast;
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}
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}
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std::array<float, 3> Painter::spinWeights(float spin) {
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spin *= util::DEG2RAD;
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float s = std::sin(spin);
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float c = std::cos(spin);
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std::array<float, 3> spin_weights = {{
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(2 * c + 1) / 3,
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(-std::sqrt(3.0f) * s - c + 1) / 3,
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(std::sqrt(3.0f) * s - c + 1) / 3
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}};
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return spin_weights;
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}
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} // namespace mbgl
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