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157 commits

Author SHA1 Message Date
Pavel Krajcevski f5e0aa4f9f Make sure to clear the MSBs of channels that have zero depth that get converted to higher depth values 2013-09-10 13:21:48 -04:00
Pavel Krajcevski 77bb7488cc Fix typo 2013-09-10 11:58:53 -04:00
Pavel Krajcevski eb312ccb0a Small refactor 2013-09-09 14:16:45 -04:00
Pavel Krajcevski 5020f81f00 Add a transparent pvr image test 2013-09-09 10:33:04 -05:00
Pavel Krajcevski 6c8eea5520 Add superfluous code from when I was trying to match the decoder to PVR library. 2013-09-09 10:31:53 -05:00
Pavel Krajcevski 09b5680245 Some small code style fixes 2013-09-06 13:37:50 -04:00
Pavel Krajcevski 5ac6872dc7 Add a test to make sure that after a bilerp the pixels that should remain unaffected do in fact remain unaffected. 2013-09-06 02:02:34 -04:00
Pavel Krajcevski 3806efe6fc Add some more hacky includes to be able to output debug images from our tests. 2013-09-06 02:02:02 -04:00
Pavel Krajcevski 91c79cd717 Fix Bilinear upscale 
There were a couple of fixes.

1. Add another set of pixels to an image that represent the fractional bits that get populated as a result of doing a bilerp.
2. Do not consider individual axes when doing the bilerp. Instead, assign a weight to each of the different texels that we will use for the bilerp. Then, combine them and save the fractional bits.
 2013-09-06 01:58:53 -04:00
Pavel Krajcevski 92827c23fc Add a debug function to our intermediate PVRTC images 2013-09-06 01:57:06 -04:00
Pavel Krajcevski 0d0c65f536 Actually index into our pixels properly... 2013-09-06 01:55:25 -04:00
Pavel Krajcevski 2263080faa Fix the interleaving by doing it when we're actually reading in the blocks 2013-09-06 01:55:06 -04:00
Pavel Krajcevski db914018f1 Two enhancements: 
1. Make sure to use the same lerping code for both modulation modes when decompressing.
2. Accept a flag during decompression that outputs the debug images that were computed during decompression.
 2013-09-06 01:53:10 -04:00
Pavel Krajcevski 7403e77d4d Add some hacky includes and libraries to support writing out debug images 2013-09-06 01:50:46 -04:00
Pavel Krajcevski a6e6138084 Change the lerp function to be more explicit. 2013-09-05 14:49:56 -04:00
Pavel Krajcevski b8e155e11c Switch red and blue channels in our decompressor test. 2013-09-05 14:49:08 -04:00
Pavel Krajcevski 7b72a84d87 Add a working directory for PVR lib tests 
Unfortunately, the WORKING_DIRECTORY directive for ADD_TEST seems to be broken as of CMake 2.8.10, fortunately there was a mail thread about this issue in 2.6 so I was able to implement the workaround.
 2013-09-04 20:43:49 -04:00
Pavel Krajcevski 6149c0af3a Add PVR tests 
If cmake was able to find Imagination's PVR library, then it'd be nice to make sure that our decompressor matches theirs. We incur a bit of overhead by adding .pvr files into git, but hopefully this cost will be beneficial to actually figuring out how things are working...
 2013-09-04 20:21:56 -04:00
Pavel Krajcevski 052157ea49 Rename our tests to start with the prefix 'Test' 2013-09-04 20:21:28 -04:00
Pavel Krajcevski abd4ba8b54 Abstract away some utilities that we can use across all of our tests, and add a test for a gray image. The test currently seems to be failing, which is likely due to a bug in our bit depth manipulation code. 2013-09-04 20:20:37 -04:00
Pavel Krajcevski 669b2c0934 Reverse the order for modulating our bits... I'm not convinced that this is right 2013-09-04 20:18:43 -04:00
Pavel Krajcevski 34ab853a62 Make sure to take into account the interleaved nature of the blocks when decompressing 2013-09-04 20:18:03 -04:00
Pavel Krajcevski bb525ae9dc If all of the PVR blocks are the same then we don't need so much code. 2013-09-04 15:28:51 -04:00
Pavel Krajcevski 9273625eeb Add initial decompressor test 2013-09-02 19:14:50 -04:00
Pavel Krajcevski 4bbd80aab2 Make sure to preserve bit depth when bilinearly upscaling 2013-09-02 19:14:31 -04:00
Pavel Krajcevski 3f4ffa61b5 Reverse byte order (and interpret the data as a 64 bit word) for PVRTC blocks 2013-09-02 19:13:53 -04:00
Pavel Krajcevski df81c73456 Default wrap mode to clamp 2013-09-02 19:12:43 -04:00
Pavel Krajcevski 5cde88d3b7 Add Image tests 2013-08-31 18:31:38 -04:00
Pavel Krajcevski 1d25e31d2a Bilinear upscale bug fixes. 2013-08-31 18:30:47 -04:00
Pavel Krajcevski 40b479487c Add accessors for image dimensions 2013-08-31 17:05:26 -04:00
Pavel Krajcevski 36641c2268 Don't set all of the memory to zero when we specify an image without any pixels 2013-08-31 16:43:32 -04:00
Pavel Krajcevski 992c72e4b5 Fix asserts 2013-08-31 16:40:49 -04:00
Pavel Krajcevski fa37aba768 Add comparison operator for pixels 2013-08-31 16:37:58 -04:00
Pavel Krajcevski 8bf682f04e Add comment for RGBA packing 2013-08-31 16:37:40 -04:00
Pavel Krajcevski b3a07e21f7 Add assignment operator 2013-08-31 16:37:07 -04:00
Pavel Krajcevski 26005bfd27 Disambiguate the Image.h from PVRTCEncoder and Core 2013-08-31 16:36:10 -04:00
Pavel Krajcevski 21199bc264 Add Pixel tests 2013-08-31 16:06:00 -04:00
Pavel Krajcevski 8c2127c08a When packing ARGB pixels make sure to convert them to 8-bit depth first 2013-08-31 16:05:50 -04:00
Pavel Krajcevski 1ffbdea2b8 Make sure to handle 0 bit depth a bit more gracefully 2013-08-31 16:05:28 -04:00
Pavel Krajcevski 9a0fbebac3 Fix bug when going from smaller to higher bit depth 2013-08-31 16:04:58 -04:00
Pavel Krajcevski ad17404bf7 Begin counting the bits from the beginning of the byte stream. The way I was doing it before was silly... 2013-08-31 14:33:44 -04:00
Pavel Krajcevski f280c2bb33 Fix some compiler warnings. 2013-08-31 13:30:12 -04:00
Pavel Krajcevski 53a8c8e3cd Fix bug where the defaulted value caused a crash (wtf?) 2013-08-30 19:08:53 -04:00
Pavel Krajcevski 012d9e3ce0 Add preliminary tests for PVRTC pixels 2013-08-30 19:08:20 -04:00
Pavel Krajcevski ab0dbbfa6e Bugfix 
The bug was that bitIdx was not being taken into account when we realized that there was enough pixel depth to stay within the current byte when reading pixel values.
 2013-08-30 18:45:14 -04:00
Pavel Krajcevski 1cc8f57538 Add block tests 2013-08-30 18:44:50 -04:00
Pavel Krajcevski 90662a56cd First pass at PVRTC Decompressor 2013-08-29 18:35:15 -04:00
Pavel Krajcevski c59deae728 Add accessors for the color channels and a method for packing the information into a 32 bit RGBA int 2013-08-29 18:34:53 -04:00
Pavel Krajcevski f822c15868 Pixel depth defaults to 8 2013-08-29 18:34:25 -04:00
Pavel Krajcevski 73f4992081 If we want a color channel with zero depth then it should default to full intensity, but we will remember that there is zero depth there. 2013-08-29 18:33:56 -04:00
Pavel Krajcevski b3d7cd7877 Constify a few things 2013-08-29 18:32:48 -04:00
Pavel Krajcevski 40743d612b Add a logical definition of an image for PVRTC 2013-08-29 18:31:42 -04:00
Pavel Krajcevski d3daed8969 Add block definitions for PVRTC 2013-08-29 12:08:32 -04:00
Pavel Krajcevski 55a61b5d8d constify some method declarations 2013-08-29 11:57:46 -04:00
Pavel Krajcevski c5fb5ba0b1 Reorder color channels to match PVRTC spec 2013-08-29 11:57:18 -04:00
Pavel Krajcevski 53e7879742 Add PVRTC Pixel class 
This class accepts a pixels with up to 8-bit components. With the way PVRTC is laid out, there are many different bit modes that we could run into. This lets us change between any that we'd like to deal with.
 2013-08-28 17:52:45 -04:00
Pavel Krajcevski 5c80b4f373 Initial files for PVRTC encoder. Starting with a decompressor. 2013-08-27 18:25:15 -04:00