Move canvas depth renderbuffers into GL backend

src/renderer_gl/opengl_capabilities.cpp

@@ -939,6 +939,70 @@ pp::foundation::Status restore_opengl_framebuffer_binding(
     return pp::foundation::Status::success();
 }
 
+pp::foundation::Result<std::uint32_t> allocate_opengl_depth_renderbuffer(
+    std::int32_t width,
+    std::int32_t height,
+    OpenGlDepthRenderbufferAllocationDispatch dispatch) noexcept
+{
+    if (dispatch.gen_renderbuffers == nullptr
+        || dispatch.bind_renderbuffer == nullptr
+        || dispatch.renderbuffer_storage == nullptr) {
+        return pp::foundation::Result<std::uint32_t>::failure(
+            pp::foundation::Status::invalid_argument(
+                "OpenGL depth renderbuffer allocation dispatch callbacks must not be null"));
+    }
+
+    if (width <= 0 || height <= 0) {
+        return pp::foundation::Result<std::uint32_t>::failure(
+            pp::foundation::Status::invalid_argument("OpenGL depth renderbuffer dimensions are invalid"));
+    }
+
+    std::uint32_t renderbuffer_id = 0U;
+    dispatch.gen_renderbuffers(1U, &renderbuffer_id);
+    if (renderbuffer_id == 0U) {
+        return pp::foundation::Result<std::uint32_t>::failure(
+            pp::foundation::Status::out_of_range("OpenGL renderbuffer allocation returned id 0"));
+    }
+
+    dispatch.bind_renderbuffer(renderbuffer_target(), renderbuffer_id);
+    dispatch.renderbuffer_storage(renderbuffer_target(), depth_component24_format(), width, height);
+    dispatch.bind_renderbuffer(renderbuffer_target(), default_framebuffer_id());
+    return pp::foundation::Result<std::uint32_t>::success(renderbuffer_id);
+}
+
+pp::foundation::Status delete_opengl_renderbuffer(
+    std::uint32_t renderbuffer_id,
+    OpenGlRenderbufferDeleteDispatch dispatch) noexcept
+{
+    if (dispatch.delete_renderbuffers == nullptr) {
+        return pp::foundation::Status::invalid_argument("OpenGL renderbuffer delete callback must not be null");
+    }
+
+    if (renderbuffer_id == 0U) {
+        return pp::foundation::Status::success();
+    }
+
+    dispatch.delete_renderbuffers(1U, &renderbuffer_id);
+    return pp::foundation::Status::success();
+}
+
+pp::foundation::Status attach_opengl_depth_renderbuffer(
+    std::uint32_t renderbuffer_id,
+    OpenGlDepthRenderbufferAttachmentDispatch dispatch) noexcept
+{
+    if (dispatch.framebuffer_renderbuffer == nullptr) {
+        return pp::foundation::Status::invalid_argument(
+            "OpenGL depth renderbuffer attachment callback must not be null");
+    }
+
+    dispatch.framebuffer_renderbuffer(
+        framebuffer_target(),
+        framebuffer_depth_attachment(),
+        renderbuffer_target(),
+        renderbuffer_id);
+    return pp::foundation::Status::success();
+}
+
 pp::foundation::Result<std::uint32_t> create_opengl_sampler(
     std::span<const OpenGlTextureParameter> parameters,
     OpenGlSamplerCreateDispatch dispatch) noexcept