stub render backend for tests; hoist out raddbg code/entry points from build target file, to be called into by sanity tests

src/render/stub/render_stub.c

@@ -0,0 +1,106 @@
+// Copyright (c) 2024 Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+//- rjf: top-level layer initialization
+
+r_hook void
+r_init(CmdLine *cmdln)
+{
+}
+
+//- rjf: window setup/teardown
+
+r_hook R_Handle
+r_window_equip(OS_Handle window)
+{
+  R_Handle handle = {0};
+  handle.u64[0] = 1;
+  return handle;
+}
+
+r_hook void
+r_window_unequip(OS_Handle window, R_Handle window_equip)
+{
+}
+
+//- rjf: textures
+
+r_hook R_Handle
+r_tex2d_alloc(R_Tex2DKind kind, Vec2S32 size, R_Tex2DFormat format, void *data)
+{
+  R_Handle handle = {0};
+  handle.u64[0] = 1;
+  return handle;
+}
+
+r_hook void
+r_tex2d_release(R_Handle texture)
+{
+}
+
+r_hook R_Tex2DKind
+r_kind_from_tex2d(R_Handle texture)
+{
+  return R_Tex2DKind_Static;
+}
+
+r_hook Vec2S32
+r_size_from_tex2d(R_Handle texture)
+{
+  return v2s32(1, 1);
+}
+
+r_hook R_Tex2DFormat
+r_format_from_tex2d(R_Handle texture)
+{
+  return R_Tex2DFormat_RGBA8;
+}
+
+r_hook void
+r_fill_tex2d_region(R_Handle texture, Rng2S32 subrect, void *data)
+{
+}
+
+//- rjf: buffers
+
+r_hook R_Handle
+r_buffer_alloc(R_BufferKind kind, U64 size, void *data)
+{
+  R_Handle handle = {0};
+  handle.u64[0] = 1;
+  return handle;
+}
+
+r_hook void
+r_buffer_release(R_Handle buffer)
+{
+}
+
+//- rjf: frame markers
+
+r_hook void
+r_begin_frame(void)
+{
+}
+
+r_hook void
+r_end_frame(void)
+{
+}
+
+r_hook void
+r_window_begin_frame(OS_Handle window, R_Handle window_equip)
+{
+}
+
+r_hook void
+r_window_end_frame(OS_Handle window, R_Handle window_equip)
+{
+}
+
+//- rjf: render pass submission
+
+r_hook void
+r_window_submit(OS_Handle window, R_Handle window_equip, R_PassList *passes)
+{
+}

src/render/stub/render_stub.h

@@ -0,0 +1,7 @@
+// Copyright (c) 2024 Epic Games Tools
+// Licensed under the MIT license (https://opensource.org/license/mit/)
+
+#ifndef RENDER_STUB_H
+#define RENDER_STUB_H
+
+#endif // RENDER_STUB_H