Run a tighter ship with extensions

[libs/gl.git] / source / pixelstore.cpp

diff --git a/source/pixelstore.cpp b/source/pixelstore.cpp
index 011866e3e72410a44031a0b154367c621bebb44f..629162cd890b1a9dfd760bc47ddc60a41ef784a9 100644 (file)
--- a/source/pixelstore.cpp
+++ b/source/pixelstore.cpp
@@ -1,4 +1,5 @@
 #include <algorithm>
+#include <msp/gl/extensions/ext_texture3d.h>
 #include "gl.h"
 #include "pixelformat.h"
 #include "pixelstore.h"
@@ -35,13 +36,15 @@ void PixelStore::update_parameter(int mask) const
        if(mask&SIZE)
        {
                glPixelStorei(GL_UNPACK_ROW_LENGTH, row_length);
-               glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, image_height);
+               if(EXT_texture3D)
+                       glPixelStorei(GL_UNPACK_IMAGE_HEIGHT, image_height);
        }
        if(mask&ORIGIN)
        {
                glPixelStorei(GL_UNPACK_SKIP_PIXELS, skip_pixels);
                glPixelStorei(GL_UNPACK_SKIP_ROWS, skip_rows);
-               glPixelStorei(GL_UNPACK_SKIP_IMAGES, skip_images);
+               if(EXT_texture3D)
+                       glPixelStorei(GL_UNPACK_SKIP_IMAGES, skip_images);
        }
        if(mask&ALIGNMENT)
                glPixelStorei(GL_UNPACK_ALIGNMENT, alignment);
@@ -56,6 +59,8 @@ void PixelStore::set_canvas_size(unsigned w, unsigned h)
 
 void PixelStore::set_origin(unsigned x, unsigned y, unsigned z)
 {
+       if(z>0)
+               static Require _req3d(EXT_texture3D);
        skip_pixels = x;
        skip_rows = y;
        skip_images = z;