render/vulkan: add Vulkan renderer

This new renderer is implemented with the existing wlr_renderer API
(which is known to be sub-optimal for some operations). It's not
used by default, but users can opt-in by setting WLR_RENDERER=vulkan.

The renderer depends on VK_EXT_image_drm_format_modifier and
VK_EXT_physical_device_drm.

Co-authored-by: Simon Ser <contact@emersion.fr>
Co-authored-by: Jan Beich <jbeich@FreeBSD.org>

1 files changed, 10 insertions, 0 deletions

diff --git a/render/vulkan/shaders/quad.frag b/render/vulkan/shaders/quad.frag
new file mode 100644
index 00000000..affd1f11
--- /dev/null
+++ b/render/vulkan/shaders/quad.frag
@@ -0,0 +1,10 @@
+#version 450
+
+layout(location = 0) out vec4 out_color;
+layout(push_constant) uniform UBO {
+	layout(offset = 80) vec4 color;
+} data;
+
+void main() {
+	out_color = data.color;
+}