Mesa (master): intel: added intel_rendering_to_texture() helper function.

[Brian Paul]

Module: Mesa
Branch: master
Commit: 345a08a77fa16f58ef956c896f1bf5f4cf118243
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=345a08a77fa16f58ef956c896f1bf5f4cf118243

Author: Brian Paul <brianp at vmware.com>
Date:   Fri Jan 16 13:31:04 2009 -0700

intel: added intel_rendering_to_texture() helper function.

When we're rendering to textures we have to invert the viewport transformation.
This helper cleans up that test and can be used elsewhere...

---

 src/mesa/drivers/dri/intel/intel_fbo.h |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/src/mesa/drivers/dri/intel/intel_fbo.h b/src/mesa/drivers/dri/intel/intel_fbo.h
index 9d15582..c57a01c 100644
--- a/src/mesa/drivers/dri/intel/intel_fbo.h
+++ b/src/mesa/drivers/dri/intel/intel_fbo.h
@@ -111,5 +111,22 @@ extern struct intel_region *intel_get_rb_region(struct gl_framebuffer *fb,
 
 
 
+/**
+ * Are we currently rendering into a texture?
+ */
+static INLINE GLboolean
+intel_rendering_to_texture(const GLcontext *ctx)
+{
+   if (ctx->DrawBuffer->Name) {
+      /* User-created FBO */
+      const struct intel_renderbuffer *irb =
+         intel_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
+      return irb && irb->RenderToTexture;
+   }
+   else {
+      return GL_FALSE;
+   }
+}
+
 
 #endif /* INTEL_FBO_H */