1 files changed, 91 insertions, 0 deletions
diff --git a/src/VBox/HostServices/SharedOpenGL/crserverlib/server_readpixels.c b/src/VBox/HostServices/SharedOpenGL/crserverlib/server_readpixels.c
new file mode 100644
index 00000000..b53ab02b
--- /dev/null
+++ b/src/VBox/HostServices/SharedOpenGL/crserverlib/server_readpixels.c
@@ -0,0 +1,91 @@
+/* Copyright (c) 2001, Stanford University
+ * All rights reserved
+ *
+ * See the file LICENSE.txt for information on redistributing this software.
+ */
+
+#include "cr_spu.h"
+#include "chromium.h"
+#include "cr_error.h"
+#include "cr_mem.h"
+#include "cr_net.h"
+#include "cr_pixeldata.h"
+#include "cr_unpack.h"
+#include "server_dispatch.h"
+#include "server.h"
+
+
+void SERVER_DISPATCH_APIENTRY
+crServerDispatchReadPixels(GLint x, GLint y, GLsizei width, GLsizei height,
+                           GLenum format, GLenum type, GLvoid *pixels)
+{
+    const GLint stride = READ_DATA( 24, GLint );
+    const GLint alignment = READ_DATA( 28, GLint );
+    const GLint skipRows = READ_DATA( 32, GLint );
+    const GLint skipPixels = READ_DATA( 36, GLint );
+    const GLint bytes_per_row = READ_DATA( 40, GLint );
+    const GLint rowLength = READ_DATA( 44, GLint );
+
+    CRASSERT(bytes_per_row > 0);
+
+#ifdef CR_ARB_pixel_buffer_object
+    if (crStateIsBufferBound(GL_PIXEL_PACK_BUFFER_ARB))
+    {
+        GLvoid *pbo_offset;
+
+        /*pixels are actually a pointer to location of 8byte network pointer in hgcm buffer
+          regardless of guest/host bitness we're using only 4lower bytes as there're no
+          pbo>4gb (yet?)
+         */
+        pbo_offset = (GLvoid*) ((uintptr_t) *((GLint*)pixels));
+
+        cr_server.head_spu->dispatch_table.ReadPixels(x, y, width, height,
+                                                      format, type, pbo_offset);
+    }
+    else
+#endif
+    {
+        CRMessageReadPixels *rp;
+        uint32_t msg_len;
+
+        if (bytes_per_row <= 0 || height <= 0 || bytes_per_row > INT32_MAX / height)
+        {
+            crError("crServerDispatchReadPixels: parameters out of range");
+            return;
+        }
+
+        msg_len = sizeof(*rp) + (uint32_t)bytes_per_row * height;
+
+        rp = (CRMessageReadPixels *) crAlloc( msg_len );
+        if (!rp)
+        {
+            crError("crServerDispatchReadPixels: out of memory");
+            return;
+        }
+
+        /* Note: the ReadPixels data gets densely packed into the buffer
+         * (no skip pixels, skip rows, etc.  It's up to the receiver (pack spu,
+         * tilesort spu, etc) to apply the real PixelStore packing parameters.
+        */
+        cr_server.head_spu->dispatch_table.ReadPixels(x, y, width, height,
+                                                      format, type, rp + 1);
+
+        rp->header.type = CR_MESSAGE_READ_PIXELS;
+        rp->width = width;
+        rp->height = height;
+        rp->bytes_per_row = bytes_per_row;
+        rp->stride = stride;
+        rp->format = format;
+        rp->type = type;
+        rp->alignment = alignment;
+        rp->skipRows = skipRows;
+        rp->skipPixels = skipPixels;
+        rp->rowLength = rowLength;
+
+        /* <pixels> points to the 8-byte network pointer */
+        crMemcpy( &rp->pixels, pixels, sizeof(rp->pixels) );
+    
+        crNetSend( cr_server.curClient->conn, NULL, rp, msg_len );
+        crFree( rp );
+    }
+}