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ANGLE: OpenGL ES to DirectX translation
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Does it support dds(dxt3) hardware decoding in wp8? #11

Closed rickdu closed 9 years ago

rickdu commented 10 years ago

I tested a dds file with dxt3 format using cocos2d-x v3.0 on windows phone 8, but found it decoded by software. If it's possible to make the dds file decoded by hardware if using ANGLE? Thanks!

stammen commented 10 years ago

We are looking into adding DDS hardware support this fall.

austinkinross commented 9 years ago

Hi,

This issue applies to the Windows Phone 8.0 version of ANGLE, which has moved to https://github.com/MSOpenTech/angle-win8.0. Please create an issue in that repository if you wish to discuss the 8.0 version of ANGLE.

Thanks, Austin

ghost commented 9 years ago

Sorry, does this mean that Windows/Phone 8.1 already supports hardware decoding of DDS?

austinkinross commented 9 years ago

Hi sqpat,

Our 8.1 version of ANGLE doesn't support loading DDS files directly, but it should support the DXT1, DXT3 and DXT5 extensions (e.g. GL_ANGLE_texture_compression_dxt3). To load a DDS file, your app will have to read the file itself, and make appropriate GL calls with the data.

The DirectX Tool Kit (DirectXTK) includes DDSTextureLoader, which is a helper to load DDS files as DirectX textures. We plan to write a version of this for ANGLE in the future, but I can't predict when that will happen.

If you would like us to write this ANGLE DDSTextureLoader soon then please feel free to file another issue on this GitHub repo.

Thanks, Austin

ghost commented 9 years ago

Thanks for the info. I decided to downscale my textures instead - I actually use webp for low disk usage and lossy variable alpha support. So i have software decoding anyway, mostly I wanted to benefit from in memory compression. I may revisit DXT3/5 again later but its not a big priority.

On Tue, Feb 10, 2015 at 11:26 AM, Austin Kinross notifications@github.com wrote:

Hi sqpat,

Our 8.1 version of ANGLE doesn't support loading DDS files directly, but it should support the DXT1, DXT3 and DXT5 extensions (e.g. GL_ANGLE_texture_compression_dxt3). To load a DDS file, your app will have to read the file itself, and make appropriate GL calls with the data.

The DirectX Tool Kit (DirectXTK) includes DDSTextureLoader, which is a helper to load DDS files as DirectX textures. We plan to write a version of this for ANGLE in the future, but I can't predict when that will happen.

If you would like us to write this ANGLE DDSTextureLoader soon then please feel free to file another issue on this GitHub repo.

Thanks, Austin

— Reply to this email directly or view it on GitHub https://github.com/MSOpenTech/angle/issues/11#issuecomment-73765612.