1 files changed, 78 insertions, 0 deletions
diff --git a/src/mbgl/renderer/layers/render_background_layer.cpp b/src/mbgl/renderer/layers/render_background_layer.cpp
index 702977cd23..9fddba3f74 100644
--- a/src/mbgl/renderer/layers/render_background_layer.cpp
+++ b/src/mbgl/renderer/layers/render_background_layer.cpp
@@ -1,9 +1,17 @@
 #include <mbgl/renderer/layers/render_background_layer.hpp>
 #include <mbgl/style/layers/background_layer_impl.hpp>
 #include <mbgl/renderer/bucket.hpp>
+#include <mbgl/renderer/paint_parameters.hpp>
+#include <mbgl/renderer/image_manager.hpp>
+#include <mbgl/renderer/render_static_data.hpp>
+#include <mbgl/programs/programs.hpp>
+#include <mbgl/programs/fill_program.hpp>
+#include <mbgl/util/tile_cover.hpp>
 
 namespace mbgl {
 
+using namespace style;
+
 RenderBackgroundLayer::RenderBackgroundLayer(Immutable<style::BackgroundLayer::Impl> _impl)
     : RenderLayer(style::LayerType::Background, _impl),
       unevaluated(impl().paint.untransitioned()) {
@@ -34,4 +42,74 @@ bool RenderBackgroundLayer::hasTransition() const {
     return unevaluated.hasTransition();
 }
 
+void RenderBackgroundLayer::render(PaintParameters& parameters, RenderSource*) {
+    // Note that for bottommost layers without a pattern, the background color is drawn with
+    // glClear rather than this method.
+
+    style::FillPaintProperties::PossiblyEvaluated properties;
+    properties.get<FillPattern>() = evaluated.get<BackgroundPattern>();
+    properties.get<FillOpacity>() = { evaluated.get<BackgroundOpacity>() };
+    properties.get<FillColor>() = { evaluated.get<BackgroundColor>() };
+
+    const FillProgram::PaintPropertyBinders paintAttibuteData(properties, 0);
+
+    if (!evaluated.get<BackgroundPattern>().to.empty()) {
+        optional<ImagePosition> imagePosA = parameters.imageManager.getPattern(evaluated.get<BackgroundPattern>().from);
+        optional<ImagePosition> imagePosB = parameters.imageManager.getPattern(evaluated.get<BackgroundPattern>().to);
+
+        if (!imagePosA || !imagePosB)
+            return;
+
+        parameters.imageManager.bind(parameters.context, 0);
+
+        for (const auto& tileID : util::tileCover(parameters.state, parameters.state.getIntegerZoom())) {
+            parameters.programs.fillPattern.get(properties).draw(
+                parameters.context,
+                gl::Triangles(),
+                parameters.depthModeForSublayer(0, gl::DepthMode::ReadOnly),
+                gl::StencilMode::disabled(),
+                parameters.colorModeForRenderPass(),
+                FillPatternUniforms::values(
+                    parameters.matrixForTile(tileID),
+                    parameters.context.viewport.getCurrentValue().size,
+                    parameters.imageManager.getPixelSize(),
+                    *imagePosA,
+                    *imagePosB,
+                    evaluated.get<BackgroundPattern>(),
+                    tileID,
+                    parameters.state
+                ),
+                parameters.staticData.tileVertexBuffer,
+                parameters.staticData.quadTriangleIndexBuffer,
+                parameters.staticData.tileTriangleSegments,
+                paintAttibuteData,
+                properties,
+                parameters.state.getZoom(),
+                getID()
+            );
+        }
+    } else {
+        for (const auto& tileID : util::tileCover(parameters.state, parameters.state.getIntegerZoom())) {
+            parameters.programs.fill.get(properties).draw(
+                parameters.context,
+                gl::Triangles(),
+                parameters.depthModeForSublayer(0, gl::DepthMode::ReadOnly),
+                gl::StencilMode::disabled(),
+                parameters.colorModeForRenderPass(),
+                FillProgram::UniformValues {
+                    uniforms::u_matrix::Value{ parameters.matrixForTile(tileID) },
+                    uniforms::u_world::Value{ parameters.context.viewport.getCurrentValue().size },
+                },
+                parameters.staticData.tileVertexBuffer,
+                parameters.staticData.quadTriangleIndexBuffer,
+                parameters.staticData.tileTriangleSegments,
+                paintAttibuteData,
+                properties,
+                parameters.state.getZoom(),
+                getID()
+            );
+        }
+    }
+}
+
 } // namespace mbgl