Changeset 561 for trunk/src/opengl/gl2paintengineex/qglgradientcache.cpp

Timestamp:

Feb 11, 2010, 11:19:06 PM (15 years ago)

Author:

Dmitry A. Kuminov

Message:

trunk: Merged in qt 4.6.1 sources.

Location:

trunk

Files:

• . (modified) (1 prop)
• src/opengl/gl2paintengineex/qglgradientcache.cpp (modified) (10 diffs)

trunk/src/opengl/gl2paintengineex/qglgradientcache.cpp

@@ -2 +2 @@
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: Qt Software Information (qt-info@nokia.com)
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the QtOpenGL module of the Qt Toolkit.
@@ -21 +22 @@
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
-** In addition, as a special exception, Nokia gives you certain
-** additional rights. These rights are described in the Nokia Qt LGPL
-** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
-** package.
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
@@ -34 +34 @@
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
-** If you are unsure which license is appropriate for your use, please
-** contact the sales department at qt-sales@nokia.com.
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
 ** $QT_END_LICENSE$
 **
@@ -45 +45 @@
 #include "qglgradientcache_p.h"
 
-void QGLGradientCache::cleanCache() {
+QT_BEGIN_NAMESPACE
+
+static void QGL2GradientCache_free(void *ptr)
+{
+    delete reinterpret_cast<QGL2GradientCache *>(ptr);
+}
+
+Q_GLOBAL_STATIC_WITH_ARGS(QGLContextResource, qt_gradient_caches, (QGL2GradientCache_free))
+
+QGL2GradientCache *QGL2GradientCache::cacheForContext(const QGLContext *context)
+{
+    QGL2GradientCache *p = reinterpret_cast<QGL2GradientCache *>(qt_gradient_caches()->value(context));
+    if (!p) {
+        QGLShareContextScope scope(context);
+        p = new QGL2GradientCache;
+        qt_gradient_caches()->insert(context, p);
+    }
+    return p;
+}
+
+void QGL2GradientCache::cleanCache() {
     QGLGradientColorTableHash::const_iterator it = cache.constBegin();
     for (; it != cache.constEnd(); ++it) {
@@ -54 +74 @@
 }
 
-GLuint QGLGradientCache::getBuffer(const QGradient &gradient, qreal opacity, const QGLContext *ctx)
+GLuint QGL2GradientCache::getBuffer(const QGradient &gradient, qreal opacity)
 {
-    if (buffer_ctx && !qgl_share_reg()->checkSharing(buffer_ctx, ctx))
-        cleanCache();
-
-    buffer_ctx = ctx;
-
     quint64 hash_val = 0;
 
@@ -85 +100 @@
 
 
-GLuint QGLGradientCache::addCacheElement(quint64 hash_val, const QGradient &gradient, qreal opacity)
+GLuint QGL2GradientCache::addCacheElement(quint64 hash_val, const QGradient &gradient, qreal opacity)
 {
     if (cache.size() == maxCacheSize()) {
@@ -110 +125 @@
 
 
-// GL's expects pixels in RGBA, bin-endian (ABGR on x86).
-// Qt stores in ARGB using whatever byte-order the mancine uses.
+// GL's expects pixels in RGBA (when using GL_RGBA), bin-endian (ABGR on x86).
+// Qt always stores in ARGB reguardless of the byte-order the mancine uses.
 static inline uint qtToGlColor(uint c)
 {
     uint o;
 #if Q_BYTE_ORDER == Q_LITTLE_ENDIAN
-    o = c & 0xFF00FF00; // alpha & green already in the right place
-    o |= (c >> 16) & 0x000000FF; // red
-    o |= (c << 16) & 0x00FF0000; // blue
-
+    o = (c & 0xff00ff00)  // alpha & green already in the right place
+        | ((c >> 16) & 0x000000ff) // red
+        | ((c << 16) & 0x00ff0000); // blue
 #else //Q_BIG_ENDIAN
-    o = c & 0x00FF00FF; // alpha & green already in the right place
-    o |= (c << 16) & 0xFF000000; // red
-    o |= (c >> 16) & 0x0000FF00; // blue
-#error big endian not tested with QGLGraphicsContext
+    o = (c << 8)
+        | ((c >> 24) & 0x000000ff);
 #endif // Q_BYTE_ORDER
     return o;
@@ -130 +142 @@
 
 //TODO: Let GL generate the texture using an FBO
-void QGLGradientCache::generateGradientColorTable(const QGradient& gradient, uint *colorTable, int size, qreal opacity) const
+void QGL2GradientCache::generateGradientColorTable(const QGradient& gradient, uint *colorTable, int size, qreal opacity) const
 {
     int pos = 0;
@@ -137 +149 @@
 
     for (int i = 0; i < s.size(); ++i)
-        colors[i] = s[i].second.rgba(); // Qt LIES! It returns ARGB
+        colors[i] = s[i].second.rgba(); // Qt LIES! It returns ARGB (on little-endian AND on big-endian)
 
     bool colorInterpolation = (gradient.interpolationMode() == QGradient::ColorInterpolation);
@@ -184 +196 @@
     colorTable[size-1] = last_color;
 }
+
+QT_END_NAMESPACE