1 files changed, 82 insertions, 0 deletions
diff --git a/src/mbgl/renderer/painters/painter_background.cpp b/src/mbgl/renderer/painters/painter_background.cpp
new file mode 100644
index 0000000000..fbd44b4480
--- /dev/null
+++ b/src/mbgl/renderer/painters/painter_background.cpp
@@ -0,0 +1,82 @@
+#include <mbgl/renderer/painter.hpp>
+#include <mbgl/renderer/paint_parameters.hpp>
+#include <mbgl/renderer/layers/render_background_layer.hpp>
+#include <mbgl/style/layers/background_layer_impl.hpp>
+#include <mbgl/programs/programs.hpp>
+#include <mbgl/programs/fill_program.hpp>
+#include <mbgl/sprite/sprite_atlas.hpp>
+#include <mbgl/util/tile_cover.hpp>
+
+namespace mbgl {
+
+using namespace style;
+
+void Painter::renderBackground(PaintParameters& parameters, const RenderBackgroundLayer& layer) {
+    // Note that for bottommost layers without a pattern, the background color is drawn with
+    // glClear rather than this method.
+    const BackgroundPaintProperties::Evaluated& background = layer.evaluated;
+
+    style::FillPaintProperties::Evaluated properties;
+    properties.get<FillPattern>() = background.get<BackgroundPattern>();
+    properties.get<FillOpacity>() = { background.get<BackgroundOpacity>() };
+    properties.get<FillColor>() = { background.get<BackgroundColor>() };
+
+    const FillProgram::PaintPropertyBinders paintAttibuteData(properties, 0);
+
+    if (!background.get<BackgroundPattern>().to.empty()) {
+        optional<SpriteAtlasElement> imagePosA = spriteAtlas->getPattern(background.get<BackgroundPattern>().from);
+        optional<SpriteAtlasElement> imagePosB = spriteAtlas->getPattern(background.get<BackgroundPattern>().to);
+
+        if (!imagePosA || !imagePosB)
+            return;
+
+        spriteAtlas->bind(true, context, 0);
+
+        for (const auto& tileID : util::tileCover(state, state.getIntegerZoom())) {
+            parameters.programs.fillPattern.draw(
+                context,
+                gl::Triangles(),
+                depthModeForSublayer(0, gl::DepthMode::ReadOnly),
+                gl::StencilMode::disabled(),
+                colorModeForRenderPass(),
+                FillPatternUniforms::values(
+                    matrixForTile(tileID),
+                    context.viewport.getCurrentValue().size,
+                    *imagePosA,
+                    *imagePosB,
+                    background.get<BackgroundPattern>(),
+                    tileID,
+                    state
+                ),
+                tileVertexBuffer,
+                quadTriangleIndexBuffer,
+                tileTriangleSegments,
+                paintAttibuteData,
+                properties,
+                state.getZoom()
+            );
+        }
+    } else {
+        for (const auto& tileID : util::tileCover(state, state.getIntegerZoom())) {
+            parameters.programs.fill.draw(
+                context,
+                gl::Triangles(),
+                depthModeForSublayer(0, gl::DepthMode::ReadOnly),
+                gl::StencilMode::disabled(),
+                colorModeForRenderPass(),
+                FillProgram::UniformValues {
+                    uniforms::u_matrix::Value{ matrixForTile(tileID) },
+                    uniforms::u_world::Value{ context.viewport.getCurrentValue().size },
+                },
+                tileVertexBuffer,
+                quadTriangleIndexBuffer,
+                tileTriangleSegments,
+                paintAttibuteData,
+                properties,
+                state.getZoom()
+            );
+        }
+    }
+}
+
+} // namespace mbgl