Add support for WebGL2 TexImage2D

Adds initial support for one of the WebGL2 `TexImage2D` call.

3 files changed, 72 insertions, 6 deletions

diff --git a/components/script/dom/webgl2renderingcontext.rs b/components/script/dom/webgl2renderingcontext.rs
index 7dd7ddd0279..41d3cd5b66c 100644
--- a/components/script/dom/webgl2renderingcontext.rs
+++ b/components/script/dom/webgl2renderingcontext.rs
@@ -2917,7 +2917,6 @@ impl WebGL2RenderingContextMethods for WebGL2RenderingContext {
     }
 
     /// https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7.6
-    #[allow(unsafe_code)]
     fn TexImage2D__(
         &self,
         target: u32,
@@ -2928,6 +2927,73 @@ impl WebGL2RenderingContextMethods for WebGL2RenderingContext {
         border: i32,
         format: u32,
         type_: u32,
+        source: ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement,
+    ) -> Fallible<()> {
+        if self.bound_pixel_unpack_buffer.get().is_some() {
+            return Ok(self.base.webgl_error(InvalidOperation));
+        }
+
+        let validator = TexImage2DValidator::new(
+            &self.base,
+            target,
+            level,
+            internalformat as u32,
+            width,
+            height,
+            border,
+            format,
+            type_,
+        );
+
+        let TexImage2DValidatorResult {
+            texture,
+            target,
+            width: _,
+            height: _,
+            level,
+            border,
+            internal_format,
+            format,
+            data_type,
+        } = match validator.validate() {
+            Ok(result) => result,
+            Err(_) => return Ok(()),
+        };
+
+        let unpacking_alignment = self.base.texture_unpacking_alignment();
+
+        let pixels = match self.base.get_image_pixels(source)? {
+            Some(pixels) => pixels,
+            None => return Ok(()),
+        };
+
+        self.base.tex_image_2d(
+            &texture,
+            target,
+            data_type,
+            internal_format,
+            format,
+            level,
+            border,
+            unpacking_alignment,
+            pixels,
+        );
+
+        Ok(())
+    }
+
+    /// https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7.6
+    #[allow(unsafe_code)]
+    fn TexImage2D___(
+        &self,
+        target: u32,
+        level: i32,
+        internalformat: i32,
+        width: i32,
+        height: i32,
+        border: i32,
+        format: u32,
+        type_: u32,
         src_data: CustomAutoRooterGuard<ArrayBufferView>,
         src_offset: u32,
     ) -> Fallible<()> {
diff --git a/components/script/dom/webglrenderingcontext.rs b/components/script/dom/webglrenderingcontext.rs
index 1c45f14b3d3..c602b294548 100644
--- a/components/script/dom/webglrenderingcontext.rs
+++ b/components/script/dom/webglrenderingcontext.rs
@@ -638,7 +638,7 @@ impl WebGLRenderingContext {
         }
     }
 
-    fn get_image_pixels(&self, source: TexImageSource) -> Fallible<Option<TexPixels>> {
+    pub fn get_image_pixels(&self, source: TexImageSource) -> Fallible<Option<TexPixels>> {
         Ok(Some(match source {
             TexImageSource::ImageData(image_data) => TexPixels::new(
                 image_data.to_shared_memory(),
diff --git a/components/script/dom/webidls/WebGL2RenderingContext.webidl b/components/script/dom/webidls/WebGL2RenderingContext.webidl
index d410f8899e4..7595fd951cf 100644
--- a/components/script/dom/webidls/WebGL2RenderingContext.webidl
+++ b/components/script/dom/webidls/WebGL2RenderingContext.webidl
@@ -508,10 +508,10 @@ interface mixin WebGL2RenderingContextOverloads
   //[Throws]
   //void texImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
   //                GLint border, GLenum format, GLenum type, GLintptr pboOffset);
-  //[Throws]
-  //void texImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
-  //                GLint border, GLenum format, GLenum type,
-  //                TexImageSource source); // May throw DOMException
+  [Throws]
+  void texImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
+                  GLint border, GLenum format, GLenum type,
+                  TexImageSource source); // May throw DOMException
   [Throws]
   void texImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
                   GLint border, GLenum format, GLenum type, /*[AllowShared]*/ ArrayBufferView srcData,