1 files changed, 107 insertions, 0 deletions
diff --git a/src/mbgl/renderer/painter_raster.cpp b/src/mbgl/renderer/painter_raster.cpp
new file mode 100644
index 0000000000..df655cdae8
--- /dev/null
+++ b/src/mbgl/renderer/painter_raster.cpp
@@ -0,0 +1,107 @@
+#include <mbgl/renderer/painter.hpp>
+#include <mbgl/platform/gl.hpp>
+#include <mbgl/renderer/raster_bucket.hpp>
+#include <mbgl/style/style_layer.hpp>
+#include <mbgl/style/style_layer_group.hpp>
+#include <mbgl/util/std.hpp>
+#include <mbgl/map/map.hpp>
+#include <mbgl/map/transform.hpp>
+
+using namespace mbgl;
+
+void Painter::renderRaster(RasterBucket& bucket, util::ptr<StyleLayer> layer_desc, const Tile::ID& id, const mat4 &matrix) {
+    if (pass != RenderPass::Translucent) return;
+
+    const RasterProperties &properties = layer_desc->getProperties<RasterProperties>();
+
+    if (layer_desc->layers) {
+
+        if (!bucket.texture.getTexture()) {
+
+            bucket.texture.bindFramebuffer();
+
+            preparePrerender(bucket);
+
+            const int buffer = bucket.properties.buffer * 4096.0f;
+
+            const mat4 preMatrix = [&]{
+                mat4 vtxMatrix;
+                matrix::ortho(vtxMatrix, -buffer, 4096 + buffer, -4096 - buffer, buffer, 0, 1);
+                matrix::translate(vtxMatrix, vtxMatrix, 0, -4096, 0);
+                return vtxMatrix;
+            }();
+
+            for (const util::ptr<StyleLayer> &layer : layer_desc->layers->layers) {
+                setOpaque();
+                renderLayer(layer, &id, &preMatrix);
+                setTranslucent();
+                renderLayer(layer, &id, &preMatrix);
+            }
+
+            if (bucket.properties.blur > 0) {
+                bucket.texture.blur(*this, bucket.properties.blur);
+            }
+
+            bucket.texture.unbindFramebuffer();
+
+            glEnable(GL_DEPTH_TEST);
+            glEnable(GL_STENCIL_TEST);
+
+            glViewport(0, 0, gl_viewport[0], gl_viewport[1]);
+
+        }
+
+        renderPrerenderedTexture(bucket, matrix, properties);
+
+    }
+
+    // Only draw non-prerendered raster here
+    if (bucket.hasData()) {
+        depthMask(false);
+
+        useProgram(rasterShader->program);
+        rasterShader->u_matrix = matrix;
+        rasterShader->u_buffer = 0;
+        rasterShader->u_opacity = properties.opacity;
+        rasterShader->u_brightness_low = properties.brightness[0];
+        rasterShader->u_brightness_high = properties.brightness[1];
+        rasterShader->u_saturation_factor = saturationFactor(properties.saturation);
+        rasterShader->u_contrast_factor = contrastFactor(properties.contrast);
+        rasterShader->u_spin_weights = spinWeights(properties.hue_rotate);
+
+        depthRange(strata + strata_epsilon, 1.0f);
+
+        bucket.drawRaster(*rasterShader, tileStencilBuffer, coveringRasterArray);
+
+        depthMask(true);
+    }
+
+}
+
+float Painter::saturationFactor(float saturation) {
+    if (saturation > 0) {
+        return 1 - 1 / (1.001 - saturation);
+    } else {
+        return -saturation;
+    }
+}
+
+float Painter::contrastFactor(float contrast) {
+    if (contrast > 0) {
+        return 1 / (1 - contrast);
+    } else {
+        return 1 + contrast;
+    }
+}
+
+std::array<float, 3> Painter::spinWeights(float spin) {
+    spin *= M_PI / 180;
+    float s = std::sin(spin);
+    float c = std::cos(spin);
+    std::array<float, 3> spin_weights = {{
+        (2 * c + 1) / 3,
+        (-std::sqrt(3.0f) * s - c + 1) / 3,
+        (std::sqrt(3.0f) * s - c + 1) / 3
+    }};
+    return spin_weights;
+}