Texturing in low level runtime api

[anon76797866]

Hello,

For my application i am implementing an Image class thru which i plan to allocate memory on the Texture memory.Since it does not require nvcc for the texture management  i chose to use the low level api(ie, “cuda_runtime_api.h”).

But when i use the following code mentioned in the guide, i get a compilation error as the 'texture" datatype  is not declared. But there is no problem with the “textureReference”.

texture<float, 1, cudaReadModeElementType> texRef; 

textureReference* texRefPtr;

These are my observations regarding the problem:

1.The struct “textureReference” is defined in “texture_types.h”.But “texture” is commented out in the following way…

#if defined(__cplusplus) && defined(__CUDACC__)

/*******************************************************************************

*                                                                              *

*                                                                              *

*                                                                              *

*******************************************************************************/

#include "host_defines.h"

#include "channel_descriptor.h"

/*******************************************************************************

*                                                                              *

*                                                                              *

*                                                                              *

*******************************************************************************/

/*TEXTURE_TYPE*/

template<class T, int dim = 1, enum cudaTextureReadMode = cudaReadModeElementType>

struct texture : public textureReference

{

  __host__ texture(int                         norm  = 0,

                   enum cudaTextureFilterMode  fMode = cudaFilterModePoint,

                   enum cudaTextureAddressMode aMode = cudaAddressModeClamp)

  {

    normalized     = norm;

    filterMode     = fMode;

    addressMode[0] = aMode;

    addressMode[1] = aMode;

    addressMode[2] = aMode;

    channelDesc    = cudaCreateChannelDesc<T>();

  }

 __host__ texture(int                          norm,

                   enum cudaTextureFilterMode   fMode,

                   enum cudaTextureAddressMode  aMode,

                   struct cudaChannelFormatDesc desc)

  {

    normalized     = norm;

    filterMode     = fMode;

    addressMode[0] = aMode;

    addressMode[1] = aMode;

    addressMode[2] = aMode;

    channelDesc    = desc;

  }

};

#endif /* __cplusplus && __CUDACC__ */

2.Even in the programming guide (Section 4.5.2.6) it has been mentioned that “texture” is a High level datatype.So i might have to  include “cuda_runtime.h” rt?.But apparently that too doesnt work.

I am developing on windows using the “cl” compiler and the SDK version i am using is the cuda 2.0 beta .

I would be extremely thankful for any suggestions to a possible work around .

Sunil

[snapback]437904[/snapback]

[MisterAnderson42]

texture< > reference variables are implicit static and declared at file scope. Thus, they must be present only in the .cu file containing the kernel that reads from the texture.

Your high level C++ code can allocate the cudaArray, device memory or whatever you need to manage the texture. Pass this to any kernel that will use the texture and it can call cudaBindTexture (a cheap operation) to bind the texture to the texture reference.

[theMarix]

Just an additional note: In my experience textures cannot be put into a namespace, unlike all other CUDA features.