Add toCLImageFormatHEADmaster

Change-Id: I10ec7869659b69038811bd48b6beb7f43fbc5a8c
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>

2 files changed, 65 insertions, 0 deletions

diff --git a/src/quickcl/qquickclcontext.cpp b/src/quickcl/qquickclcontext.cpp
index 7aae3fa..9d63fec 100644
--- a/src/quickcl/qquickclcontext.cpp
+++ b/src/quickcl/qquickclcontext.cpp
@@ -397,4 +397,65 @@ cl_program QQuickCLContext::buildProgramFromFile(const QString &filename)
     return buildProgram(f.readAll());
 }
 
+/*!
+    Returns a matching OpenCL image format for the given QImage \a format.
+ */
+cl_image_format QQuickCLContext::toCLImageFormat(QImage::Format format)
+{
+    cl_image_format fmt;
+
+    switch (format) {
+    case QImage::Format_Indexed8:
+        fmt.image_channel_order = CL_A;
+        fmt.image_channel_data_type = CL_UNORM_INT8;
+        break;
+
+    case QImage::Format_RGB32:
+    case QImage::Format_ARGB32:
+    case QImage::Format_ARGB32_Premultiplied:
+        if (QSysInfo::ByteOrder == QSysInfo::LittleEndian) {
+            fmt.image_channel_order = CL_BGRA;
+            fmt.image_channel_data_type = CL_UNORM_INT8;
+        } else {
+            fmt.image_channel_order = CL_ARGB;
+            fmt.image_channel_data_type = CL_UNORM_INT8;
+        }
+        break;
+
+    case QImage::Format_RGB16:
+        fmt.image_channel_order = CL_RGB;
+        fmt.image_channel_data_type = CL_UNORM_SHORT_565;
+        break;
+
+    case QImage::Format_RGB555:
+        fmt.image_channel_order = CL_RGB;
+        fmt.image_channel_data_type = CL_UNORM_SHORT_555;
+        break;
+
+    case QImage::Format_RGB888:
+        fmt.image_channel_order = CL_RGB;
+        fmt.image_channel_data_type = CL_UNORM_INT8;
+        break;
+
+    case QImage::Format_RGBX8888:
+        fmt.image_channel_order = CL_RGBx;
+        fmt.image_channel_data_type = CL_UNORM_INT8;
+        break;
+
+    case QImage::Format_RGBA8888:
+    case QImage:: Format_RGBA8888_Premultiplied:
+        fmt.image_channel_order = CL_RGBA;
+        fmt.image_channel_data_type = CL_UNORM_INT8;
+        break;
+
+    default:
+        qWarning("toCLImageFormat: Unrecognized QImage format %d", format);
+        fmt.image_channel_order = 0;
+        fmt.image_channel_data_type = 0;
+        break;
+    }
+
+    return fmt;
+}
+
 QT_END_NAMESPACE
diff --git a/src/quickcl/qquickclcontext.h b/src/quickcl/qquickclcontext.h
index d780ad5..2072188 100644
--- a/src/quickcl/qquickclcontext.h
+++ b/src/quickcl/qquickclcontext.h
@@ -38,6 +38,7 @@
 #define QQUICKCLCONTEXT_H
 
 #include <QtQuickCL/qtquickclglobal.h>
+#include <QtGui/qimage.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -62,9 +63,12 @@ public:
 
     QByteArray platformName() const;
     QByteArray deviceExtensions() const;
+
     cl_program buildProgram(const QByteArray &src);
     cl_program buildProgramFromFile(const QString &filename);
 
+    static cl_image_format toCLImageFormat(QImage::Format format);
+
 private:
     QQuickCLContextPrivate *d_ptr;
 };