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« on: December 28, 2011, 04:55:38 PM »
Hi!
I am working on a iMac Core i7, with the ATI Radeon HD4850 graphics card on OS X Lion. It should use Open CL/GL as shown below. Although I checked the card in "Preferences / Open CL" it isn't used by Photoscan (see last line!).
The documentation says that support for Radeon cards begins with the series 5xxx, which is pretty disappointing, as the graphics card cannot be changed in iMacs. What is the reason, that Radeon series 4xxx are not supported though Open CL/GL works well on them and can we hope for a change? Could a new driver solve the problem?
Greetings
Oliver
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OpenGL Vendor: ATI Technologies Inc.
OpenGL Renderer: ATI Radeon HD 4850 OpenGL Engine
OpenGL Version: 2.1 ATI-7.12.9
Maximum Texture Size: 8192
ARB_vertex_buffer_object: supported
ARB_texture_non_power_of_two: supported
loaded project in 2.82574 sec
initializing...
selected 33 cameras from 33 in 0.167065 sec
Loading photos...
Reconstructing depth...
Using device: Radeon HD 4850, 10 compute units, 512 MB global memory
max work group size 1024
max work item sizes [1024, 1024, 1024]
max mem alloc size 128 MB
max workgroup size c1: 64 c3: 64 zero: 256 hamming: 64 filter: 256 box: 256
max workgroup size zero: 256 costs: 256 b1: 64 bn: 64 wta: 256 transpose: 64
estimating 848x686x32 disparity using 283x229x32 tiles, offset 0
estimating 848x686x32 disparity using 283x229x32 tiles, offset 0
GPU processing failed, switching to CPU mode