[core] introduce gfx::RenderPass

3 files changed, 50 insertions, 0 deletions

diff --git a/src/mbgl/gfx/command_encoder.hpp b/src/mbgl/gfx/command_encoder.hpp
index f095c5b867..145c2bef82 100644
--- a/src/mbgl/gfx/command_encoder.hpp
+++ b/src/mbgl/gfx/command_encoder.hpp
@@ -2,9 +2,14 @@
 
 #include <mbgl/gfx/debug_group.hpp>
 
+#include <memory>
+
 namespace mbgl {
 namespace gfx {
 
+class RenderPassDescriptor;
+class RenderPass;
+
 class CommandEncoder {
 protected:
     explicit CommandEncoder() = default;
@@ -21,6 +26,8 @@ public:
     DebugGroup<CommandEncoder> createDebugGroup(const char* name) {
         return { *this, name };
     }
+
+    virtual std::unique_ptr<RenderPass> createRenderPass(const char* name, const RenderPassDescriptor&) = 0;
 };
 
 } // namespace gfx
diff --git a/src/mbgl/gfx/program.hpp b/src/mbgl/gfx/program.hpp
index 94ba3b18ef..b636bc2654 100644
--- a/src/mbgl/gfx/program.hpp
+++ b/src/mbgl/gfx/program.hpp
@@ -13,6 +13,7 @@ class ColorMode;
 class CullFaceMode;
 class DrawScope;
 class IndexBuffer;
+class RenderPass;
 template <class> class UniformValues;
 template <class> class AttributeBindings;
 template <class> class TextureBindings;
@@ -35,6 +36,7 @@ public:
     using TextureList = typename Name::TextureList;
 
     virtual void draw(Context&,
+                      RenderPass&,
                       const DrawMode&,
                       const DepthMode&,
                       const StencilMode&,
diff --git a/src/mbgl/gfx/render_pass.hpp b/src/mbgl/gfx/render_pass.hpp
new file mode 100644
index 0000000000..db5ba661ba
--- /dev/null
+++ b/src/mbgl/gfx/render_pass.hpp
@@ -0,0 +1,41 @@
+#pragma once
+
+#include <mbgl/gfx/debug_group.hpp>
+#include <mbgl/util/color.hpp>
+#include <mbgl/util/optional.hpp>
+
+#include <cstdint>
+
+namespace mbgl {
+namespace gfx {
+
+class Renderable;
+
+class RenderPassDescriptor {
+public:
+    Renderable& renderable;
+    optional<Color> clearColor;
+    optional<float> clearDepth;
+    optional<int32_t> clearStencil;
+};
+
+class RenderPass {
+protected:
+    RenderPass() = default;
+
+    friend class DebugGroup<RenderPass>;
+    virtual void pushDebugGroup(const char* name) = 0;
+    virtual void popDebugGroup() = 0;
+
+public:
+    virtual ~RenderPass() = default;
+    RenderPass(const RenderPass&) = delete;
+    RenderPass& operator=(const RenderPass&) = delete;
+
+    DebugGroup<RenderPass> createDebugGroup(const char* name) {
+        return { *this, name };
+    }
+};
+
+} // namespace gfx
+} // namespace mbgl