From 96b781e9298460f47d6f1e7bf2699e046c8eeba3 Mon Sep 17 00:00:00 2001 From: Martin Vignali Date: Thu, 28 Sep 2017 21:37:46 +0200 Subject: [PATCH 2/7] libavcodec/texturedspenc : add rgtc1_u_alpha encoding func this func encode the alpha channel of the rgba input to an rgtc1u block --- libavcodec/texturedspenc.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/libavcodec/texturedspenc.c b/libavcodec/texturedspenc.c index 8b2863033b..ae2e95e23f 100644 --- a/libavcodec/texturedspenc.c +++ b/libavcodec/texturedspenc.c @@ -647,9 +647,26 @@ static int dxt5ys_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) return 16; } +/** + * Compress one block of RGBA pixels in a RGTC1U texture and store the + * resulting bytes in 'dst'. Use the alpha channel of the input image. + * + * @param dst output buffer. + * @param stride scanline in bytes. + * @param block block to compress. + * @return how much texture data has been written. + */ +static int rgtc1u_alpha_block(uint8_t *dst, ptrdiff_t stride, const uint8_t *block) +{ + compress_alpha(dst, stride, block); + + return 8; +} + av_cold void ff_texturedspenc_init(TextureDSPContext *c) { c->dxt1_block = dxt1_block; c->dxt5_block = dxt5_block; c->dxt5ys_block = dxt5ys_block; + c->rgtc1u_alpha_block = rgtc1u_alpha_block; } -- 2.11.0 (Apple Git-81)