Bug 1335296 - Expand about:support WebGL information

10 files changed, 131 insertions, 12 deletions

diff --git a/dom/bindings/Bindings.conf b/dom/bindings/Bindings.conf
index aa7f26ad6..6f9733c5f 100644
--- a/dom/bindings/Bindings.conf
+++ b/dom/bindings/Bindings.conf
@@ -1222,6 +1222,11 @@ DOMInterfaces = {
     'headerFile': 'WebGLExtensions.h'
 },
 
+'MOZ_debug_get': {
+    'nativeType': 'mozilla::WebGLExtensionDebugGet',
+    'headerFile': 'WebGLExtensions.h'
+},
+
 'WebGLFramebuffer': {
     'nativeType': 'mozilla::WebGLFramebuffer',
     'headerFile': 'WebGLFramebuffer.h'
diff --git a/dom/canvas/WebGLContextExtensions.cpp b/dom/canvas/WebGLContextExtensions.cpp
index 4a5a23274..7f338b4e9 100644
--- a/dom/canvas/WebGLContextExtensions.cpp
+++ b/dom/canvas/WebGLContextExtensions.cpp
@@ -40,6 +40,7 @@ WebGLContext::GetExtensionString(WebGLExtensionID ext)
         WEBGL_EXTENSION_IDENTIFIER(EXT_sRGB)
         WEBGL_EXTENSION_IDENTIFIER(EXT_texture_filter_anisotropic)
         WEBGL_EXTENSION_IDENTIFIER(EXT_disjoint_timer_query)
+        WEBGL_EXTENSION_IDENTIFIER(MOZ_debug_get)
         WEBGL_EXTENSION_IDENTIFIER(OES_element_index_uint)
         WEBGL_EXTENSION_IDENTIFIER(OES_standard_derivatives)
         WEBGL_EXTENSION_IDENTIFIER(OES_texture_float)
@@ -91,6 +92,8 @@ bool WebGLContext::IsExtensionSupported(dom::CallerType callerType,
         switch (ext) {
         case WebGLExtensionID::EXT_disjoint_timer_query:
             return WebGLExtensionDisjointTimerQuery::IsSupported(this);
+        case WebGLExtensionID::MOZ_debug_get:
+            return true;
         case WebGLExtensionID::WEBGL_debug_renderer_info:
             return true;
         case WebGLExtensionID::WEBGL_debug_shaders:
@@ -372,6 +375,11 @@ WebGLContext::EnableExtension(WebGLExtensionID ext)
         obj = new WebGLExtensionTextureFilterAnisotropic(this);
         break;
 
+    // MOZ_
+    case WebGLExtensionID::MOZ_debug_get:
+        obj = new WebGLExtensionDebugGet(this);
+        break;
+
     // OES_
     case WebGLExtensionID::OES_element_index_uint:
         obj = new WebGLExtensionElementIndexUint(this);
diff --git a/dom/canvas/WebGLContextState.cpp b/dom/canvas/WebGLContextState.cpp
index e0234f5c6..c2f4c1a75 100644
--- a/dom/canvas/WebGLContextState.cpp
+++ b/dom/canvas/WebGLContextState.cpp
@@ -61,18 +61,6 @@ WebGLContext::Enable(GLenum cap)
     gl->fEnable(cap);
 }
 
-static JS::Value
-StringValue(JSContext* cx, const nsAString& str, ErrorResult& rv)
-{
-    JSString* jsStr = JS_NewUCStringCopyN(cx, str.BeginReading(), str.Length());
-    if (!jsStr) {
-        rv.Throw(NS_ERROR_OUT_OF_MEMORY);
-        return JS::NullValue();
-    }
-
-    return JS::StringValue(jsStr);
-}
-
 bool
 WebGLContext::GetStencilBits(GLint* const out_stencilBits)
 {
diff --git a/dom/canvas/WebGLContextUtils.cpp b/dom/canvas/WebGLContextUtils.cpp
index 9c0d34939..3fd32eb30 100644
--- a/dom/canvas/WebGLContextUtils.cpp
+++ b/dom/canvas/WebGLContextUtils.cpp
@@ -874,4 +874,16 @@ InfoFrom(WebGLTexImageFunc func, WebGLTexDimensions dims)
     }
 }
 
+JS::Value
+StringValue(JSContext* cx, const nsAString& str, ErrorResult& er)
+{
+    JSString* jsStr = JS_NewUCStringCopyN(cx, str.BeginReading(), str.Length());
+    if (!jsStr) {
+        er.Throw(NS_ERROR_OUT_OF_MEMORY);
+        return JS::NullValue();
+    }
+
+    return JS::StringValue(jsStr);
+}
+
 } // namespace mozilla
diff --git a/dom/canvas/WebGLContextUtils.h b/dom/canvas/WebGLContextUtils.h
index 5401fc878..1d06659b1 100644
--- a/dom/canvas/WebGLContextUtils.h
+++ b/dom/canvas/WebGLContextUtils.h
@@ -94,6 +94,8 @@ WebGLContext::WebGLObjectAsJSObject(JSContext* cx,
  */
 const char* InfoFrom(WebGLTexImageFunc func, WebGLTexDimensions dims);
 
+JS::Value StringValue(JSContext* cx, const nsAString& str, ErrorResult& er);
+
 } // namespace mozilla
 
 #endif // WEBGL_CONTEXT_UTILS_H_
diff --git a/dom/canvas/WebGLExtensionDebugGet.cpp b/dom/canvas/WebGLExtensionDebugGet.cpp
new file mode 100644
index 000000000..39bb3c57a
--- /dev/null
+++ b/dom/canvas/WebGLExtensionDebugGet.cpp
@@ -0,0 +1,79 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WebGLExtensions.h"
+
+#include "mozilla/dom/WebGLRenderingContextBinding.h"
+#include "WebGLContext.h"
+#include "WebGLContextUtils.h"
+
+namespace mozilla {
+
+WebGLExtensionDebugGet::WebGLExtensionDebugGet(WebGLContext* webgl)
+    : WebGLExtensionBase(webgl)
+{
+}
+
+WebGLExtensionDebugGet::~WebGLExtensionDebugGet()
+{
+}
+
+void
+WebGLExtensionDebugGet::GetParameter(JSContext* cx, GLenum pname,
+                                     JS::MutableHandle<JS::Value> retval,
+                                     ErrorResult& er) const
+{
+    const auto& gl = mContext->gl;
+    gl->MakeCurrent();
+
+    switch (pname) {
+    case LOCAL_GL_EXTENSIONS:
+        {
+            nsString ret;
+            if (!gl->IsCoreProfile()) {
+                const auto rawExts = (const char*)gl->fGetString(LOCAL_GL_EXTENSIONS);
+                ret = NS_ConvertUTF8toUTF16(rawExts);
+            } else {
+                const auto& numExts = gl->GetIntAs<GLuint>(LOCAL_GL_NUM_EXTENSIONS);
+                for (GLuint i = 0; i < numExts; i++) {
+                    const auto rawExt = (const char*)gl->fGetStringi(LOCAL_GL_EXTENSIONS,
+                                                                     i);
+                    if (i > 0) {
+                        ret.AppendLiteral(" ");
+                    }
+                    ret.Append(NS_ConvertUTF8toUTF16(rawExt));
+                }
+            }
+            retval.set(StringValue(cx, ret, er));
+            return;
+        }
+
+    case LOCAL_GL_RENDERER:
+    case LOCAL_GL_VENDOR:
+    case LOCAL_GL_VERSION:
+        {
+            const auto raw = (const char*)gl->fGetString(pname);
+            retval.set(StringValue(cx, NS_ConvertUTF8toUTF16(raw), er));
+            return;
+        }
+
+    case 0x10000: // "WSI_INFO"
+        {
+            nsCString info;
+            gl->GetWSIInfo(&info);
+            retval.set(StringValue(cx, NS_ConvertUTF8toUTF16(info), er));
+            return;
+        }
+
+    default:
+        mContext->ErrorInvalidEnumArg("MOZ_debug_get.getParameter", "pname", pname);
+        retval.set(JS::NullValue());
+        return;
+    }
+}
+
+IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionDebugGet, MOZ_debug_get)
+
+} // namespace mozilla
diff --git a/dom/canvas/WebGLExtensions.h b/dom/canvas/WebGLExtensions.h
index 741f6997f..7b6b6b54b 100644
--- a/dom/canvas/WebGLExtensions.h
+++ b/dom/canvas/WebGLExtensions.h
@@ -12,6 +12,7 @@
 #include "WebGLTypes.h"
 
 namespace mozilla {
+class ErrorResult;
 
 namespace dom {
 template<typename T>
@@ -385,6 +386,19 @@ public:
     DECL_WEBGL_EXTENSION_GOOP
 };
 
+class WebGLExtensionDebugGet final
+    : public WebGLExtensionBase
+{
+public:
+    explicit WebGLExtensionDebugGet(WebGLContext* webgl);
+    virtual ~WebGLExtensionDebugGet();
+
+    void GetParameter(JSContext* cx, GLenum pname,
+                      JS::MutableHandle<JS::Value> retval, ErrorResult& er) const;
+
+    DECL_WEBGL_EXTENSION_GOOP
+};
+
 } // namespace mozilla
 
 #endif // WEBGL_EXTENSIONS_H_
diff --git a/dom/canvas/WebGLTypes.h b/dom/canvas/WebGLTypes.h
index 42b8701f3..2f4a4368a 100644
--- a/dom/canvas/WebGLTypes.h
+++ b/dom/canvas/WebGLTypes.h
@@ -149,6 +149,7 @@ enum class WebGLExtensionID : uint8_t {
     EXT_shader_texture_lod,
     EXT_texture_filter_anisotropic,
     EXT_disjoint_timer_query,
+    MOZ_debug_get,
     OES_element_index_uint,
     OES_standard_derivatives,
     OES_texture_float,
diff --git a/dom/canvas/moz.build b/dom/canvas/moz.build
index f7555b33d..6d5e2756f 100644
--- a/dom/canvas/moz.build
+++ b/dom/canvas/moz.build
@@ -105,6 +105,7 @@ UNIFIED_SOURCES += [
     'WebGLExtensionCompressedTextureETC1.cpp',
     'WebGLExtensionCompressedTexturePVRTC.cpp',
     'WebGLExtensionCompressedTextureS3TC.cpp',
+    'WebGLExtensionDebugGet.cpp',
     'WebGLExtensionDebugRendererInfo.cpp',
     'WebGLExtensionDebugShaders.cpp',
     'WebGLExtensionDepthTexture.cpp',
diff --git a/dom/webidl/WebGLRenderingContext.webidl b/dom/webidl/WebGLRenderingContext.webidl
index dd0e6ff69..323d23421 100644
--- a/dom/webidl/WebGLRenderingContext.webidl
+++ b/dom/webidl/WebGLRenderingContext.webidl
@@ -1046,3 +1046,12 @@ interface EXT_disjoint_timer_query {
     any getQueryEXT(GLenum target, GLenum pname);
     any getQueryObjectEXT(WebGLQuery query, GLenum pname);
 };
+
+[NoInterfaceObject]
+interface MOZ_debug_get {
+    const GLenum EXTENSIONS = 0x1F03;
+    const GLenum WSI_INFO   = 0x10000;
+
+    [Throws]
+    any getParameter(GLenum pname);
+};