Query max texture size instead of hardcoding it

2 files changed, 20 insertions, 0 deletions

diff --git a/cuda/3d/mem3d.cu b/cuda/3d/mem3d.cu
index 6d81dc0..0320117 100644
--- a/cuda/3d/mem3d.cu
+++ b/cuda/3d/mem3d.cu
@@ -62,6 +62,25 @@ size_t availableGPUMemory()
 	return free;
 }
 
+int maxBlockDimension()
+{
+	int dev;
+	cudaError_t err = cudaGetDevice(&dev);
+	if (err != cudaSuccess) {
+		ASTRA_WARN("Error querying device");
+		return 0;
+	}
+
+	cudaDeviceProp props;
+	err = cudaGetDeviceProperties(&props, dev);
+	if (err != cudaSuccess) {
+		ASTRA_WARN("Error querying device %d properties", dev);
+		return 0;
+	}
+
+	return std::min(props.maxTexture3D[0], std::min(props.maxTexture3D[1], props.maxTexture3D[2]));
+}
+
 MemHandle3D allocateGPUMemory(unsigned int x, unsigned int y, unsigned int z, Mem3DZeroMode zero)
 {
 	SMemHandle3D_internal hnd;
diff --git a/cuda/3d/mem3d.h b/cuda/3d/mem3d.h
index acb72cb..6fff80b 100644
--- a/cuda/3d/mem3d.h
+++ b/cuda/3d/mem3d.h
@@ -78,6 +78,7 @@ enum Mem3DZeroMode {
 };
 
 size_t availableGPUMemory();
+int maxBlockDimension();
 
 MemHandle3D allocateGPUMemory(unsigned int x, unsigned int y, unsigned int z, Mem3DZeroMode zero);