Route app viewport scissor through renderer GL

src/renderer_gl/opengl_capabilities.cpp

@@ -281,6 +281,51 @@ pp::foundation::Status clear_panopainter_default_target(OpenGlClearDispatch disp
     return pp::foundation::Status::success();
 }
 
+pp::foundation::Status apply_opengl_viewport(
+    OpenGlViewportRect viewport,
+    OpenGlViewportDispatch dispatch) noexcept
+{
+    if (dispatch.viewport == nullptr) {
+        return pp::foundation::Status::invalid_argument("OpenGL viewport dispatch callback must not be null");
+    }
+
+    dispatch.viewport(viewport.x, viewport.y, viewport.width, viewport.height);
+    return pp::foundation::Status::success();
+}
+
+pp::foundation::Status apply_opengl_scissor_rect(
+    OpenGlScissorRect scissor,
+    OpenGlScissorDispatch dispatch) noexcept
+{
+    if (dispatch.enable == nullptr || dispatch.disable == nullptr || dispatch.scissor == nullptr) {
+        return pp::foundation::Status::invalid_argument("OpenGL scissor dispatch callbacks must not be null");
+    }
+
+    if (scissor.enabled != 0U) {
+        dispatch.enable(scissor_test_state());
+        dispatch.scissor(scissor.x, scissor.y, scissor.width, scissor.height);
+    } else {
+        dispatch.disable(scissor_test_state());
+    }
+    return pp::foundation::Status::success();
+}
+
+pp::foundation::Status apply_opengl_scissor_test(
+    bool enabled,
+    OpenGlScissorTestDispatch dispatch) noexcept
+{
+    if (dispatch.enable == nullptr || dispatch.disable == nullptr) {
+        return pp::foundation::Status::invalid_argument("OpenGL scissor test dispatch callbacks must not be null");
+    }
+
+    if (enabled) {
+        dispatch.enable(scissor_test_state());
+    } else {
+        dispatch.disable(scissor_test_state());
+    }
+    return pp::foundation::Status::success();
+}
+
 std::uint32_t extension_count_query() noexcept
 {
     return gl_num_extensions;