Bug 682496: fixed program-test.html test failures

Fixed programs and shaders so that when they're marked for deletion and then detached completely, are deleted.

content/canvas/src/WebGLContext.h

@@ -700,6 +700,7 @@ public:
 
     friend class WebGLTexture;
     friend class WebGLFramebuffer;
+    friend class WebGLProgram;
 };
 
 // this class is a mixin for the named type wrappers, and is used
@@ -1388,21 +1389,36 @@ public:
     WebGLShader(WebGLContext *context, WebGLuint name, WebGLenum stype) :
         WebGLContextBoundObject(context),
         mName(name), mDeleted(false), mType(stype),
-        mNeedsTranslation(true), mAttachCount(0)
+        mNeedsTranslation(true), mAttachCount(0),
+        mDeletePending(false)
     { }
 
+    void DetachedFromProgram() {
+        DecrementAttachCount();
+        if (mDeletePending && AttachCount() <= 0) {
+            Delete();
+        }
+    }
+
     void Delete() {
         if (mDeleted)
             return;
+
+        if (AttachCount() > 0) {
+            mDeletePending = true;
+            return;
+        }
+
         ZeroOwners();
         mDeleted = true;
+        mDeletePending = false;
     }
 
-    bool Deleted() { return mDeleted && mAttachCount == 0; }
+    bool Deleted() { return mDeleted; }
     WebGLuint GLName() { return mName; }
     WebGLenum ShaderType() { return mType; }
 
-    PRUint32 AttachCount() { return mAttachCount; }
+    PRInt32 AttachCount() { return mAttachCount; }
     void IncrementAttachCount() { mAttachCount++; }
     void DecrementAttachCount() { mAttachCount--; }
 
@@ -1436,7 +1452,8 @@ protected:
     nsString mSource;
     nsCString mTranslationLog;
     bool mNeedsTranslation;
-    PRUint32 mAttachCount;
+    PRInt32 mAttachCount;
+    bool mDeletePending;
 };
 
 NS_DEFINE_STATIC_IID_ACCESSOR(WebGLShader, WEBGLSHADER_PRIVATE_IID)
@@ -1466,19 +1483,35 @@ public:
     void Delete() {
         if (mDeleted)
             return;
+
+        if (mContext->mCurrentProgram == this) {
+            mDeletePending = true;
+            return;
+        }
+
+        DetachShaders();
         ZeroOwners();
         mDeleted = true;
+        mDeletePending = false;
     }
 
     void DetachShaders() {
         for (PRUint32 i = 0; i < mAttachedShaders.Length(); ++i) {
-            if (mAttachedShaders[i])
-                mAttachedShaders[i]->DecrementAttachCount();
+            WebGLShader* shader = mAttachedShaders[i];
+            if (shader)
+                shader->DetachedFromProgram();
         }
         mAttachedShaders.Clear();
     }
 
-    bool Deleted() { return mDeleted && !mDeletePending; }
+    void NoLongerCurrent() {
+        if (mDeletePending) {
+            DetachShaders();
+            Delete();
+        }
+    }
+
+    bool Deleted() { return mDeleted; }
     void SetDeletePending() { mDeletePending = true; }
     void ClearDeletePending() { mDeletePending = false; }
     bool HasDeletePending() { return mDeletePending; }
@@ -1505,7 +1538,7 @@ public:
     // return true if the shader was found and removed
     bool DetachShader(WebGLShader *shader) {
         if (mAttachedShaders.RemoveElement(shader)) {
-            shader->DecrementAttachCount();
+            shader->DetachedFromProgram();
             return true;
         }
         return false;

content/canvas/src/WebGLContextGL.cpp

@@ -1159,12 +1159,6 @@ WebGLContext::DeleteProgram(nsIWebGLProgram *pobj)
 
     gl->fDeleteProgram(progname);
 
-    if (prog == mCurrentProgram) {
-        prog->SetDeletePending();
-    } else {
-        prog->DetachShaders();
-    }
-
     prog->Delete();
     mMapPrograms.Remove(progname);
 
@@ -1212,6 +1206,8 @@ WebGLContext::DetachShader(nsIWebGLProgram *pobj, nsIWebGLShader *shobj)
 
     gl->fDetachShader(progname, shadername);
 
+    shader->DetachedFromProgram();
+
     return NS_OK;
 }
 
@@ -2438,6 +2434,12 @@ WebGLContext::GetProgramParameter(nsIWebGLProgram *pobj, PRUint32 pname, nsIVari
             break;
         case LOCAL_GL_DELETE_STATUS:
         case LOCAL_GL_LINK_STATUS:
+        {
+            GLint i = 0;
+            gl->fGetProgramiv(progname, pname, &i);
+            wrval->SetAsBool(bool(i));
+        }
+            break;
         case LOCAL_GL_VALIDATE_STATUS:
         {
             GLint i = 0;
@@ -3967,13 +3969,12 @@ WebGLContext::UseProgram(nsIWebGLProgram *pobj)
 
     gl->fUseProgram(progname);
 
-    if (mCurrentProgram && mCurrentProgram->HasDeletePending()) {
-        mCurrentProgram->DetachShaders();
-        mCurrentProgram->ClearDeletePending();
-    }
-
+    WebGLProgram* previous = mCurrentProgram;
     mCurrentProgram = prog;
 
+    if (previous)
+        previous->NoLongerCurrent();
+
     return NS_OK;
 }
 
@@ -4191,7 +4192,6 @@ WebGLContext::GetShaderParameter(nsIWebGLShader *sobj, WebGLenum pname, nsIVaria
             wrval->SetAsBool(bool(i));
         }
             break;
-
         default:
             return NS_ERROR_NOT_IMPLEMENTED;
     }

content/canvas/test/webgl/failing_tests_mac.txt

@@ -5,7 +5,6 @@ conformance/glsl/misc/glsl-function-nodes.html
 conformance/glsl/misc/glsl-long-variable-names.html
 conformance/glsl/misc/shader-with-256-character-identifier.frag.html
 conformance/glsl/misc/shader-with-long-line.html
-conformance/programs/program-test.html
 conformance/reading/read-pixels-test.html
 conformance/renderbuffers/framebuffer-object-attachment.html
 conformance/state/gl-object-get-calls.html