render: hide graphics API behind traits

src/gfx_apis/gl/renderer/image.rs

@@ -1,15 +1,18 @@
 use {
-    crate::gfx_apis::gl::{
-        egl::image::EglImage,
-        gl::{render_buffer::GlRenderBuffer, texture::GlTexture},
-        Framebuffer, RenderContext, RenderError, Texture,
+    crate::{
+        gfx_api::{GfxError, GfxFramebuffer, GfxImage, GfxTexture},
+        gfx_apis::gl::{
+            egl::image::EglImage,
+            gl::{render_buffer::GlRenderBuffer, texture::GlTexture},
+            Framebuffer, GlRenderContext, RenderError, Texture,
+        },
     },
     std::rc::Rc,
 };
 
 pub struct Image {
-    pub(crate) ctx: Rc<RenderContext>,
-    pub(crate) gl: Rc<EglImage>,
+    pub(in crate::gfx_apis::gl) ctx: Rc<GlRenderContext>,
+    pub(in crate::gfx_apis::gl) gl: Rc<EglImage>,
 }
 
 impl Image {
@@ -21,14 +24,14 @@ impl Image {
         self.gl.height
     }
 
-    pub fn to_texture(self: &Rc<Self>) -> Result<Rc<Texture>, RenderError> {
+    fn to_texture(self: &Rc<Self>) -> Result<Rc<Texture>, RenderError> {
         Ok(Rc::new(Texture {
             ctx: self.ctx.clone(),
             gl: GlTexture::import_img(&self.ctx.ctx, &self.gl)?,
         }))
     }
 
-    pub fn to_framebuffer(&self) -> Result<Rc<Framebuffer>, RenderError> {
+    fn to_framebuffer(&self) -> Result<Rc<Framebuffer>, RenderError> {
         self.ctx.ctx.with_current(|| unsafe {
             let rb = GlRenderBuffer::from_image(&self.gl, &self.ctx.ctx)?;
             let fb = rb.create_framebuffer()?;
@@ -39,3 +42,27 @@ impl Image {
         })
     }
 }
+
+impl GfxImage for Image {
+    fn to_framebuffer(self: Rc<Self>) -> Result<Rc<dyn GfxFramebuffer>, GfxError> {
+        (*self)
+            .to_framebuffer()
+            .map(|v| v as Rc<dyn GfxFramebuffer>)
+            .map_err(|e| e.into())
+    }
+
+    fn to_texture(self: Rc<Self>) -> Result<Rc<dyn GfxTexture>, GfxError> {
+        (&self)
+            .to_texture()
+            .map(|v| v as Rc<dyn GfxTexture>)
+            .map_err(|e| e.into())
+    }
+
+    fn width(&self) -> i32 {
+        self.width()
+    }
+
+    fn height(&self) -> i32 {
+        self.height()
+    }
+}