[core] add gfx::Renderable and gfx::OffscreenTexture

2 files changed, 35 insertions, 0 deletions

diff --git a/src/mbgl/gfx/context.hpp b/src/mbgl/gfx/context.hpp
index 1ce00f04d1..c956debcb0 100644
--- a/src/mbgl/gfx/context.hpp
+++ b/src/mbgl/gfx/context.hpp
@@ -17,6 +17,8 @@ class ProgramParameters;
 
 namespace gfx {
 
+class OffscreenTexture;
+
 class Context {
 protected:
     Context(ContextType type_, uint32_t maximumVertexBindingCount_)
@@ -124,6 +126,14 @@ protected:
         TexturePixelType, TextureChannelDataType) = 0;
 
 public:
+    virtual std::unique_ptr<gfx::OffscreenTexture> createOffscreenTexture(
+        Size, gfx::TextureChannelDataType = gfx::TextureChannelDataType::UnsignedByte) = 0;
+    virtual std::unique_ptr<gfx::OffscreenTexture> createOffscreenTexture(
+        Size,
+        gfx::Renderbuffer<gfx::RenderbufferPixelType::Depth>&,
+        gfx::TextureChannelDataType = gfx::TextureChannelDataType::UnsignedByte) = 0;
+
+public:
     template <RenderbufferPixelType pixelType>
     Renderbuffer<pixelType>
     createRenderbuffer(const Size size) {
diff --git a/src/mbgl/gfx/offscreen_texture.hpp b/src/mbgl/gfx/offscreen_texture.hpp
new file mode 100644
index 0000000000..1eaf4557c6
--- /dev/null
+++ b/src/mbgl/gfx/offscreen_texture.hpp
@@ -0,0 +1,25 @@
+#pragma once
+
+#include <mbgl/gfx/renderable.hpp>
+#include <mbgl/util/image.hpp>
+
+namespace mbgl {
+namespace gfx {
+
+class Texture;
+
+class OffscreenTexture : public gfx::Renderable {
+protected:
+    OffscreenTexture(const Size size_, std::unique_ptr<RenderableResource> resource_)
+        : gfx::Renderable(size_, std::move(resource_)) {
+    }
+
+public:
+    virtual ~OffscreenTexture() = default;
+
+    virtual PremultipliedImage readStillImage() = 0;
+    virtual gfx::Texture& getTexture() = 0;
+};
+
+} // namespace gfx
+} // namespace mbgl