initial PoC

1 files changed, 97 insertions, 0 deletions

diff --git a/main.lua b/main.lua
new file mode 100644
index 0000000..db26f90
--- /dev/null
+++ b/main.lua
@@ -0,0 +1,97 @@
+local ffi = require 'ffi'
+
+ffi.cdef [[
+// gl.h
+typedef int GLint;
+typedef unsigned int GLuint;
+typedef unsigned int GLenum;
+
+// texture_share_ipc.h
+typedef enum ImgFormat {
+    R8G8B8A8,
+    R8G8B8,
+    B8G8R8A8,
+    B8G8R8,
+    Undefined,
+} ImgFormat;
+
+// texture_share_gl_client.h
+typedef enum ImageLookupResult {
+    Error = -1,
+    NotFound = 0,
+    Found = 1,
+    RequiresUpdate = 2,
+} ImageLookupResult;
+
+typedef struct ClientImageDataGuard ClientImageDataGuard;
+
+typedef struct GlClient GlClient;
+
+typedef struct GlImageExtent {
+    GLint top_left[2];
+    GLint bottom_right[2];
+} GlImageExtent;
+
+bool gl_client_initialize_external_gl(void);
+
+struct GlClient *gl_client_new(const char *socket_path, uint64_t timeout_in_millis);
+
+void gl_client_destroy(struct GlClient *gl_client);
+
+enum ImageLookupResult gl_client_init_image(struct GlClient *gl_client,
+                                            const char *image_name,
+                                            uint32_t width,
+                                            uint32_t height,
+                                            ImgFormat format,
+                                            bool overwrite_existing);
+
+int gl_client_send_image(struct GlClient *gl_client,
+                         const char *image_name,
+                         void*, // GLuint src_texture_id,
+                         GLenum src_texture_target,
+                         bool invert,
+                         GLuint prev_fbo,
+                         const struct GlImageExtent *extents);
+]]
+local tvs = ffi.load("texture_share_gl_client")
+
+local width, height
+local canvas
+local client, image
+
+function love.load()
+  width, height = love.graphics.getDimensions()
+  canvas = love.graphics.newCanvas(width, height)
+
+  assert(tvs.gl_client_initialize_external_gl(), "no init")
+  client = assert(tvs.gl_client_new("/tmp/vk_server/vk_server.sock", 1000))
+  image = assert(tvs.gl_client_init_image(client, "love2d", width, height, ffi.C.R8G8B8A8, true) > 0)
+end
+
+local angle = 0
+
+function love.update(dt)
+  angle = angle + 5 * dt
+end
+
+function love.draw()
+  love.graphics.setCanvas(canvas)
+    love.graphics.clear(0, 0, 0, 0)
+    love.graphics.translate(width/2, height/2)
+    love.graphics.rotate(angle)
+
+    love.graphics.setColor(1, 0, 0, 1)
+    love.graphics.rectangle("fill", -150,-150, 300,300)
+  love.graphics.setCanvas()
+
+  tvs.gl_client_send_image(
+    client, "love2d",
+    canvas:getHandle(),
+    0x0DE1, -- GL_TEXTURE_2D
+    false, 0, nil
+  )
+
+  love.graphics.reset()
+  love.graphics.setBlendMode("alpha", "premultiplied")
+  love.graphics.draw(canvas)
+end