Initial import attempt, just to play with. Many things disabled/removed

ui/cc/ProgramBinding.cpp

+/*
+ * Copyright (C) 2011 Google Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+
+#if USE(ACCELERATED_COMPOSITING)
+
+#include "ProgramBinding.h"
+
+#include "GeometryBinding.h"
+#include "GraphicsContext3D.h"
+#include "LayerRendererChromium.h"
+#include "TraceEvent.h"
+#include <public/WebGraphicsContext3D.h>
+#include <wtf/text/CString.h>
+
+using WebKit::WebGraphicsContext3D;
+
+namespace WebCore {
+
+ProgramBindingBase::ProgramBindingBase()
+    : m_program(0)
+    , m_initialized(false)
+{
+}
+
+ProgramBindingBase::~ProgramBindingBase()
+{
+    // If you hit these asserts, you initialized but forgot to call cleanup().
+    ASSERT(!m_program);
+    ASSERT(!m_initialized);
+}
+
+static bool contextLost(WebGraphicsContext3D* context)
+{
+    return (context->getGraphicsResetStatusARB() != GL_NO_ERROR);
+}
+
+
+void ProgramBindingBase::init(WebGraphicsContext3D* context, const String& vertexShader, const String& fragmentShader)
+{
+    m_program = createShaderProgram(context, vertexShader, fragmentShader);
+    ASSERT(m_program || contextLost(context));
+}
+
+void ProgramBindingBase::cleanup(WebGraphicsContext3D* context)
+{
+    m_initialized = false;
+    if (!m_program)
+        return;
+
+    ASSERT(context);
+    GLC(context, context->deleteProgram(m_program));
+    m_program = 0;
+}
+
+unsigned ProgramBindingBase::loadShader(WebGraphicsContext3D* context, unsigned type, const String& shaderSource)
+{
+    unsigned shader = context->createShader(type);
+    if (!shader)
+        return 0;
+    String sourceString(shaderSource);
+    GLC(context, context->shaderSource(shader, sourceString.utf8().data()));
+    GLC(context, context->compileShader(shader));
+#ifndef NDEBUG
+    int compiled = 0;
+    GLC(context, context->getShaderiv(shader, GL_COMPILE_STATUS, &compiled));
+    if (!compiled) {
+        GLC(context, context->deleteShader(shader));
+        return 0;
+    }
+#endif
+    return shader;
+}
+
+unsigned ProgramBindingBase::createShaderProgram(WebGraphicsContext3D* context, const String& vertexShaderSource, const String& fragmentShaderSource)
+{
+    TRACE_EVENT0("cc", "ProgramBindingBase::createShaderProgram");
+    unsigned vertexShader = loadShader(context, GL_VERTEX_SHADER, vertexShaderSource);
+    if (!vertexShader) {
+        if (!contextLost(context))
+            LOG_ERROR("Failed to create vertex shader");
+        return 0;
+    }
+
+    unsigned fragmentShader = loadShader(context, GL_FRAGMENT_SHADER, fragmentShaderSource);
+    if (!fragmentShader) {
+        GLC(context, context->deleteShader(vertexShader));
+        if (!contextLost(context))
+            LOG_ERROR("Failed to create fragment shader");
+        return 0;
+    }
+
+    unsigned programObject = context->createProgram();
+    if (!programObject) {
+        if (!contextLost(context))
+            LOG_ERROR("Failed to create shader program");
+        return 0;
+    }
+
+    GLC(context, context->attachShader(programObject, vertexShader));
+    GLC(context, context->attachShader(programObject, fragmentShader));
+
+    // Bind the common attrib locations.
+    GLC(context, context->bindAttribLocation(programObject, GeometryBinding::positionAttribLocation(), "a_position"));
+    GLC(context, context->bindAttribLocation(programObject, GeometryBinding::texCoordAttribLocation(), "a_texCoord"));
+
+    GLC(context, context->linkProgram(programObject));
+#ifndef NDEBUG
+    int linked = 0;
+    GLC(context, context->getProgramiv(programObject, GL_LINK_STATUS, &linked));
+    if (!linked) {
+        if (!contextLost(context))
+            LOG_ERROR("Failed to link shader program");
+        GLC(context, context->deleteProgram(programObject));
+        return 0;
+    }
+#endif
+
+    GLC(context, context->deleteShader(vertexShader));
+    GLC(context, context->deleteShader(fragmentShader));
+    return programObject;
+}
+
+} // namespace WebCore
+
+#endif // USE(ACCELERATED_COMPOSITING)