diff options
| -rw-r--r-- | src/mesa/state_tracker/st_gen_mipmap.c | 112 |
1 files changed, 102 insertions, 10 deletions
diff --git a/src/mesa/state_tracker/st_gen_mipmap.c b/src/mesa/state_tracker/st_gen_mipmap.c index 453be425bcb..d6b024d8b8c 100644 --- a/src/mesa/state_tracker/st_gen_mipmap.c +++ b/src/mesa/state_tracker/st_gen_mipmap.c @@ -95,6 +95,52 @@ st_render_mipmap(struct st_context *st, /** + * Helper function to decompress an image. The result is a 32-bpp RGBA + * image with stride==width. + */ +static void +decompress_image(enum pipe_format format, + const uint8_t *src, uint8_t *dst, + unsigned width, unsigned height) +{ + const struct util_format_description *desc = util_format_description(format); + const uint bw = util_format_get_blockwidth(format); + const uint src_stride = align(width, bw) / util_format_get_blocksize(format); + const uint dst_stride = 4 * width; + + /* + printf("decompress %s %d x %d %d -> %d\n", + util_format_name(format), width, height, src_stride, dst_stride); + */ + + desc->unpack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height); +} + + +/** + * Helper function to compress an image. The source is a 32-bpp RGBA image + * with stride==width. + */ +static void +compress_image(enum pipe_format format, + const uint8_t *src, uint8_t *dst, + unsigned width, unsigned height) +{ + const struct util_format_description *desc = util_format_description(format); + const uint bw = util_format_get_blockwidth(format); + const uint src_stride = 4 * width; + const uint dst_stride = align(width, bw) / util_format_get_blocksize(format); + + /* + printf("compress %s %d x %d %d -> %d\n", + util_format_name(format), width, height, src_stride, dst_stride); + */ + + desc->pack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height); +} + + +/** * Software fallback for generate mipmap levels. */ static void @@ -109,14 +155,25 @@ fallback_generate_mipmap(GLcontext *ctx, GLenum target, uint dstLevel; GLenum datatype; GLuint comps; + GLboolean compressed; if (ST_DEBUG & DEBUG_FALLBACK) debug_printf("%s: fallback processing\n", __FUNCTION__); assert(target != GL_TEXTURE_3D); /* not done yet */ - _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat, - &datatype, &comps); + compressed = + _mesa_is_format_compressed(texObj->Image[face][baseLevel]->TexFormat); + + if (compressed) { + datatype = GL_UNSIGNED_BYTE; + comps = 4; + } + else { + _mesa_format_to_type_and_comps(texObj->Image[face][baseLevel]->TexFormat, + &datatype, &comps); + assert(comps > 0 && "bad texture format in fallback_generate_mipmap()"); + } for (dstLevel = baseLevel + 1; dstLevel <= lastLevel; dstLevel++) { const uint srcLevel = dstLevel - 1; @@ -148,14 +205,49 @@ fallback_generate_mipmap(GLcontext *ctx, GLenum target, srcStride = srcTrans->stride / util_format_get_blocksize(srcTrans->resource->format); dstStride = dstTrans->stride / util_format_get_blocksize(dstTrans->resource->format); - _mesa_generate_mipmap_level(target, datatype, comps, - 0 /*border*/, - srcWidth, srcHeight, srcDepth, - srcData, - srcStride, /* stride in texels */ - dstWidth, dstHeight, dstDepth, - dstData, - dstStride); /* stride in texels */ + if (compressed) { + const enum pipe_format format = pt->format; + const uint bw = util_format_get_blockwidth(format); + const uint bh = util_format_get_blockheight(format); + const uint srcWidth2 = align(srcWidth, bw); + const uint srcHeight2 = align(srcHeight, bh); + const uint dstWidth2 = align(dstWidth, bw); + const uint dstHeight2 = align(dstHeight, bh); + uint8_t *srcTemp, *dstTemp; + + assert(comps == 4); + + srcTemp = malloc(srcWidth2 * srcHeight2 * comps + 000); + dstTemp = malloc(dstWidth2 * dstHeight2 * comps + 000); + + /* decompress the src image: srcData -> srcTemp */ + decompress_image(format, srcData, srcTemp, srcWidth, srcHeight); + + _mesa_generate_mipmap_level(target, datatype, comps, + 0 /*border*/, + srcWidth2, srcHeight2, srcDepth, + srcTemp, + srcWidth2, /* stride in texels */ + dstWidth2, dstHeight2, dstDepth, + dstTemp, + dstWidth2); /* stride in texels */ + + /* compress the new image: dstTemp -> dstData */ + compress_image(format, dstTemp, dstData, dstWidth2, dstHeight2); + + free(srcTemp); + free(dstTemp); + } + else { + _mesa_generate_mipmap_level(target, datatype, comps, + 0 /*border*/, + srcWidth, srcHeight, srcDepth, + srcData, + srcStride, /* stride in texels */ + dstWidth, dstHeight, dstDepth, + dstData, + dstStride); /* stride in texels */ + } pipe_transfer_unmap(pipe, srcTrans); pipe_transfer_unmap(pipe, dstTrans); |