Changeset 651 for trunk/src/opengl/qglshaderprogram.cpp

Timestamp:

Mar 8, 2010, 12:52:58 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.6.2 sources.

Location:

trunk

Files:

• . (modified) (1 prop)
• src/opengl/qglshaderprogram.cpp (modified) (5 diffs)

trunk/src/opengl/qglshaderprogram.cpp

@@ -1 +1 @@
 /****************************************************************************
 **
-** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
@@ -106 +106 @@
 
     \snippet doc/src/snippets/code/src_opengl_qglshaderprogram.cpp 2
+
+    \section1 Binary shaders and programs
+
+    Binary shaders may be specified using \c{glShaderBinary()} on
+    the return value from QGLShader::shaderId().  The QGLShader instance
+    containing the binary can then be added to the shader program with
+    addShader() and linked in the usual fashion with link().
+
+    Binary programs may be specified using \c{glProgramBinaryOES()}
+    on the return value from programId().  Then the application should
+    call link(), which will notice that the program has already been
+    specified and linked, allowing other operations to be performed
+    on the shader program.
 
     \sa QGLShader
@@ -633 +646 @@
             return false;
         }
-        if (!shader->d_func()->compiled)
-            return false;
         if (!shader->d_func()->shaderGuard.id())
             return false;
@@ -821 +832 @@
     if (!program)
         return false;
+    GLint value;
+    if (d->shaders.isEmpty()) {
+        // If there are no explicit shaders, then it is possible that the
+        // application added a program binary with glProgramBinaryOES(),
+        // or otherwise populated the shaders itself.  Check to see if the
+        // program is already linked and bail out if so.
+        value = 0;
+        glGetProgramiv(program, GL_LINK_STATUS, &value);
+        d->linked = (value != 0);
+        if (d->linked)
+            return true;
+    }
     glLinkProgram(program);
-    GLint value = 0;
+    value = 0;
     glGetProgramiv(program, GL_LINK_STATUS, &value);
     d->linked = (value != 0);
@@ -929 +952 @@
 {
     Q_D(const QGLShaderProgram);
+    GLuint id = d->programGuard.id();
+    if (id)
+        return id;
+
+    // Create the identifier if we don't have one yet.  This is for
+    // applications that want to create the attached shader configuration
+    // themselves, particularly those using program binaries.
+    if (!const_cast<QGLShaderProgram *>(this)->init())
+        return 0;
     return d->programGuard.id();
 }