1 files changed, 230 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/surfaces/egl/EGLConfigSelector.cpp b/Source/WebCore/platform/graphics/surfaces/egl/EGLConfigSelector.cpp
new file mode 100644
index 000000000..8d6033014
--- /dev/null
+++ b/Source/WebCore/platform/graphics/surfaces/egl/EGLConfigSelector.cpp
@@ -0,0 +1,230 @@
+/*
+ * Copyright (C) 2012 Intel Corporation. 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 INC. 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 INC. 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"
+#include "EGLConfigSelector.h"
+
+#if USE(EGL)
+
+#include "EGLHelper.h"
+
+namespace WebCore {
+
+EGLConfigSelector::EGLConfigSelector(GLPlatformSurface::SurfaceAttributes attributes)
+    : m_pixmapFBConfig(0)
+    , m_surfaceContextFBConfig(0)
+    , m_attributes(attributes)
+{
+    m_sharedDisplay = EGLHelper::eglDisplay();
+}
+
+EGLConfigSelector::~EGLConfigSelector()
+{
+}
+
+EGLConfig EGLConfigSelector::pixmapContextConfig()
+{
+    if (!m_pixmapFBConfig)
+        m_pixmapFBConfig = createConfig(EGL_PIXMAP_BIT);
+
+    return m_pixmapFBConfig;
+}
+
+EGLConfig EGLConfigSelector::surfaceContextConfig()
+{
+    if (!m_surfaceContextFBConfig)
+        m_surfaceContextFBConfig = createConfig(EGL_WINDOW_BIT);
+
+    return m_surfaceContextFBConfig;
+}
+
+EGLint EGLConfigSelector::nativeVisualId(const EGLConfig& config) const
+{
+    if (m_sharedDisplay == EGL_NO_DISPLAY)
+        return -1;
+
+    EGLint eglValue = 0;
+    eglGetConfigAttrib(m_sharedDisplay, config, EGL_NATIVE_VISUAL_ID, &eglValue);
+
+    return eglValue;
+}
+
+GLPlatformSurface::SurfaceAttributes EGLConfigSelector::attributes() const
+{
+    return m_attributes;
+}
+
+void EGLConfigSelector::reset()
+{
+    m_surfaceContextFBConfig = 0;
+    m_pixmapFBConfig = 0;
+}
+
+EGLConfig EGLConfigSelector::createConfig(EGLint expectedSurfaceType)
+{
+    if (m_sharedDisplay == EGL_NO_DISPLAY)
+        return 0;
+
+    EGLint numConfigs;
+
+    eglGetConfigs(m_sharedDisplay, 0, 0, &numConfigs);
+
+    if (!numConfigs) {
+        LOG_ERROR("Failed to retrieve number of EGL configs.");
+        return 0;
+    }
+
+    EGLConfig configs[numConfigs];
+    eglGetConfigs(m_sharedDisplay, configs, numConfigs, &numConfigs);
+
+    if (!numConfigs) {
+        LOG_ERROR("Failed to retrieve any EGL configs.");
+        return 0;
+    }
+
+    EGLConfig config = 0;
+    EGLint alpha, surface, red, green, blue, renderType;
+    EGLint expectedAlpha = m_attributes & GLPlatformSurface::SupportAlpha ? 8 : 0;
+    EGLint expectedRed = 8;
+    EGLint expectedBlue = 8;
+    EGLint expectedGreen = 8;
+#if USE(OPENGL_ES_2)
+    EGLint expectedRenderType = EGL_OPENGL_ES2_BIT;
+#else
+    EGLint expectedRenderType = EGL_OPENGL_BIT,
+#endif
+
+    for (int i = 0; i < numConfigs; i++) {
+        EGLConfig tempConfig = configs[i];
+        eglGetConfigAttrib(m_sharedDisplay, tempConfig, EGL_RENDERABLE_TYPE, &renderType);
+
+        if (!(renderType & expectedRenderType))
+            continue;
+
+        eglGetConfigAttrib(m_sharedDisplay, tempConfig, EGL_ALPHA_SIZE, &alpha);
+
+        if (alpha != expectedAlpha)
+            continue;
+
+        eglGetConfigAttrib(m_sharedDisplay, tempConfig, EGL_RED_SIZE, &red);
+
+        if (red != expectedRed)
+            continue;
+
+        eglGetConfigAttrib(m_sharedDisplay, tempConfig, EGL_GREEN_SIZE, &green);
+
+        if (green != expectedGreen)
+            continue;
+
+        eglGetConfigAttrib(m_sharedDisplay, tempConfig, EGL_BLUE_SIZE, &blue);
+
+        if (blue != expectedBlue)
+            continue;
+
+        eglGetConfigAttrib(m_sharedDisplay, tempConfig, EGL_SURFACE_TYPE, &surface);
+
+        if (surface & expectedSurfaceType) {
+            config = configs[i];
+            break;
+        }
+    }
+
+    if ((m_attributes & GLPlatformSurface::SupportAlpha) && !config) {
+        LOG_ERROR("Failed to retrieve EGL Configuration with alpha. Trying to find one without alpha support.");
+        m_attributes &= ~GLPlatformSurface::SupportAlpha;
+        config = createConfig(expectedSurfaceType);
+    }
+
+    if (!config)
+        LOG_ERROR("Failed to find a valid EGL Configuration.");
+
+    return config;
+}
+
+#if PLATFORM(X11)
+EGLConfig EGLConfigSelector::surfaceClientConfig(NativeVisualId id)
+{
+    EGLConfig config = findMatchingConfigWithVisualId(id);
+
+    if (!config)
+        config = createConfig(EGL_PIXMAP_BIT);
+
+    return config;
+}
+
+EGLConfig EGLConfigSelector::findMatchingConfigWithVisualId(NativeVisualId id)
+{
+    if (m_sharedDisplay == EGL_NO_DISPLAY)
+        return 0;
+
+    EGLint numConfigs;
+    EGLint i;
+    EGLint visualId;
+    EGLConfig config = 0;
+
+    eglGetConfigs(m_sharedDisplay, 0, 0, &numConfigs);
+
+    if (!numConfigs) {
+        LOG_ERROR("Failed to retrieve any EGL configs.");
+        return 0;
+    }
+
+    EGLConfig configs[numConfigs];
+    eglGetConfigs(m_sharedDisplay, configs, numConfigs, &numConfigs);
+
+    if (!numConfigs) {
+        LOG_ERROR("Failed to retrieve any EGL configs.");
+        return 0;
+    }
+
+    int alphaChannelRequired = m_attributes & GLPlatformSurface::SupportAlpha ? 8 : 0;
+    for (i = 0; i < numConfigs; i++) {
+        EGLint alpha, surfaces;
+        EGLConfig tempConfig = configs[i];
+        eglGetConfigAttrib(m_sharedDisplay, tempConfig, EGL_NATIVE_VISUAL_ID, &visualId);
+
+        if (static_cast<NativeVisualId>(visualId) != id)
+            continue;
+
+        eglGetConfigAttrib(m_sharedDisplay, tempConfig, EGL_ALPHA_SIZE, &alpha);
+
+        if (alphaChannelRequired != alpha)
+            continue;
+
+        eglGetConfigAttrib(m_sharedDisplay, tempConfig, EGL_SURFACE_TYPE, &surfaces);
+
+        if (surfaces & EGL_PIXMAP_BIT) {
+            config = tempConfig;
+            break;
+        }
+    }
+
+    return config;
+}
+#endif
+
+}
+
+#endif