Bug 1627368 - allow requesting trilinear filtering in SWGL. r=jimb

Differential Revision: https://phabricator.services.mozilla.com/D69897

--HG--
extra : moz-landing-system : lando

gfx/wr/swgl/src/gl.cc

@@ -1379,6 +1379,10 @@ void TexImage3D(GLenum target, GLint level, GLint internal_format,
   TexSubImage3D(target, 0, 0, 0, 0, width, height, depth, format, ty, data);
 }
 
+void GenerateMipmap(GLenum target) {
+  // TODO: support mipmaps
+}
+
 void TexParameteri(GLenum target, GLenum pname, GLint param) {
   Texture& t = ctx->textures[ctx->get_binding(target)];
   switch (pname) {
@@ -1389,11 +1393,9 @@ void TexParameteri(GLenum target, GLenum pname, GLint param) {
       assert(param == GL_CLAMP_TO_EDGE);
       break;
     case GL_TEXTURE_MIN_FILTER:
-      assert(param == GL_NEAREST || param == GL_LINEAR);
       t.min_filter = param;
       break;
     case GL_TEXTURE_MAG_FILTER:
-      assert(param == GL_NEAREST || param == GL_LINEAR);
       t.mag_filter = param;
       break;
     default:

gfx/wr/swgl/src/swgl_fns.rs

@@ -121,6 +121,7 @@ extern "C" {
         ty: GLenum,
         data: *const c_void,
     );
+    fn GenerateMipmap(target: GLenum);
     fn GetUniformLocation(program: GLuint, name: *const GLchar) -> GLint;
     fn BindAttribLocation(program: GLuint, index: GLuint, name: *const GLchar);
     fn GetAttribLocation(program: GLuint, name: *const GLchar) -> GLint;
@@ -2055,7 +2056,9 @@ impl Gl for Context {
     }
 
     fn generate_mipmap(&self, target: GLenum) {
-        panic!();
+        unsafe {
+            GenerateMipmap(target);
+        }
     }
 
     fn insert_event_marker_ext(&self, message: &str) {