[core] Introduce TileRenderData

Remove rendering functionality from Tile implementations.

src/mbgl/renderer/tile_render_data.cpp

@@ -0,0 +1,40 @@
+#include <mbgl/renderer/tile_render_data.hpp>
+
+namespace mbgl {
+
+TileRenderData::TileRenderData() = default;
+
+TileRenderData::TileRenderData(std::shared_ptr<TileAtlasTextures> atlasTextures_)
+    : atlasTextures(std::move(atlasTextures_)) {
+}
+
+TileRenderData::~TileRenderData() = default;
+
+const gfx::Texture& TileRenderData::getGlyphAtlasTexture() const {
+    assert(atlasTextures);
+    assert(atlasTextures->glyph);
+    return *atlasTextures->glyph;
+}
+
+const gfx::Texture& TileRenderData::getIconAtlasTexture() const {
+    assert(atlasTextures);
+    assert(atlasTextures->icon);
+    return *atlasTextures->icon;
+}
+
+optional<ImagePosition> TileRenderData::getPattern(const std::string&) const {
+    assert(false);
+    return nullopt;
+}
+
+const LayerRenderData* TileRenderData::getLayerRenderData(const style::Layer::Impl&) const {
+    assert(false);
+    return nullptr;
+}
+
+Bucket* TileRenderData::getBucket(const style::Layer::Impl&) const {
+    assert(false);
+    return nullptr;
+}
+
+} // namespace mbgl