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Adding an option GLLegacy to force OpenGL 1

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Setting option "GLLegacy" to true in config group "Compositing"
will disable all GLSL shaders and kwin uses the legacy OpenGL 1
code pathes. Obviously the option is ignored with GLES.

As my Qt Designer is refusing to work, there is no GUI option yet.
This commit is contained in:
Martin Gräßlin 2011-04-29 16:41:11 +02:00
parent 728f333e6a
commit 5290e78106
1 changed files with 13 additions and 1 deletions
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14
libkwineffects/kwinglutils.cpp
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@ -28,6 +28,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "kdebug.h"
#include <kstandarddirs.h>
#include <KDE/KConfig>
#include <KDE/KConfigGroup>
#include <QPixmap>
#include <QImage>
@ -57,6 +59,7 @@ static int eglVersion;
static QStringList glExtensions;
static QStringList glxExtensions;
static QStringList eglExtension;
static bool legacyGl;
int glTextureUnitsCount;
@ -97,7 +100,12 @@ void initGL()
QStringList glversioninfo = glversionstring.left(glversionstring.indexOf(' ')).split('.');
while (glversioninfo.count() < 3)
glversioninfo << "0";
#ifndef KWIN_HAVE_OPENGLES
#ifdef KWIN_HAVE_OPENGLES
legacyGl = false;
#else
KSharedConfig::Ptr kwinconfig = KSharedConfig::openConfig("kwinrc", KConfig::NoGlobals);
KConfigGroup config(kwinconfig, "Compositing");
legacyGl = config.readEntry<bool>("GLLegacy", false);
glVersion = MAKE_GL_VERSION(glversioninfo[0].toInt(), glversioninfo[1].toInt(), glversioninfo[2].toInt());
#endif
// Get list of supported OpenGL extensions
@ -1228,6 +1236,10 @@ GLShader *ShaderManager::loadShaderFromCode(const QByteArray &vertexSource, cons
void ShaderManager::initShaders()
{
if (legacyGl) {
kDebug(1212) << "OpenGL Shaders disabled by config option";
return;
}
m_orthoShader = new GLShader(":/resources/scene-vertex.glsl", ":/resources/scene-fragment.glsl");
if (m_orthoShader->isValid()) {
pushShader(SimpleShader, true);