Cycles: Add support for bindless textures.

This adds support for CUDA Texture objects (also known as Bindless textures) for Kepler GPUs (Geforce 6xx and above).
This is used for all 2D/3D textures, data still uses arrays as before.

User benefits:
* No more limits of image textures on Kepler.
 We had 5 float4 and 145 byte4 slots there before, now we have 1024 float4 and 1024 byte4.
 This can be extended further if we need to (just change the define).

* Single channel textures slots (byte and float) are now supported on Kepler as well (1024 slots for each type).

ToDo / Issues:
* 3D textures don't work yet, at least don't show up during render. I have no idea whats wrong yet.
* Dynamically allocate bindless_mapping array?

I hope Fermi still works fine, but that should be tested on a Fermi card before pushing to master.

Part of my GSoC 2016.

Reviewers: sergey, #cycles, brecht

Subscribers: swerner, jtheninja, brecht, sergey

Differential Revision: https://developer.blender.org/D1999

1 files changed, 3 insertions, 2 deletions

diff --git a/intern/cycles/device/device.h b/intern/cycles/device/device.h
index 4c1b7224837..e11bb7f76af 100644
--- a/intern/cycles/device/device.h
+++ b/intern/cycles/device/device.h
@@ -54,7 +54,7 @@ public:
 	bool display_device;
 	bool advanced_shading;
 	bool pack_images;
-	bool extended_images; /* flag for GPU and Multi device */
+	bool has_bindless_textures; /* flag for GPU and Multi device */
 	bool use_split_kernel; /* Denotes if the device is going to run cycles using split-kernel */
 	vector<DeviceInfo> multi_devices;
 
@@ -66,7 +66,7 @@ public:
 		display_device = false;
 		advanced_shading = true;
 		pack_images = false;
-		extended_images = false;
+		has_bindless_textures = false;
 		use_split_kernel = false;
 	}
 };
@@ -230,6 +230,7 @@ public:
 		(void)interpolation;  /* Ignored. */
 		(void)extension;  /* Ignored. */
 	};
+
 	virtual void tex_free(device_memory& /*mem*/) {};
 
 	/* pixel memory */