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st/mesa: fix compressed mipmap generation.

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If the underlying transfer had a stride wider for hw alignment reasons,
the mipmap generation would generate badly strided images.

this fixes a few problems I found while testing r600g with s3tc

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2011-02-15 12:50:37 +10:00
parent dc578188fa
commit fdb4373a20
1 changed files with 4 additions and 6 deletions
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10
src/mesa/state_tracker/st_gen_mipmap.c
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@ -105,13 +105,12 @@ st_render_mipmap(struct st_context *st,
static void
decompress_image(enum pipe_format format,
const uint8_t *src, uint8_t *dst,
unsigned width, unsigned height)
unsigned width, unsigned height, unsigned src_stride)
{
const struct util_format_description *desc = util_format_description(format);
const uint bw = util_format_get_blockwidth(format);
const uint bh = util_format_get_blockheight(format);
const uint dst_stride = 4 * MAX2(width, bw);
const uint src_stride = util_format_get_stride(format, width);
desc->unpack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height);
@ -144,10 +143,9 @@ decompress_image(enum pipe_format format,
static void
compress_image(enum pipe_format format,
const uint8_t *src, uint8_t *dst,
unsigned width, unsigned height)
unsigned width, unsigned height, unsigned dst_stride)
{
const struct util_format_description *desc = util_format_description(format);
const uint dst_stride = util_format_get_stride(format, width);
const uint src_stride = 4 * width;
desc->pack_rgba_8unorm(dst, dst_stride, src, src_stride, width, height);
@ -236,7 +234,7 @@ fallback_generate_mipmap(struct gl_context *ctx, GLenum target,
dstTemp = malloc(dstWidth2 * dstHeight2 * comps + 000);
/* decompress the src image: srcData -> srcTemp */
decompress_image(format, srcData, srcTemp, srcWidth, srcHeight);
decompress_image(format, srcData, srcTemp, srcWidth, srcHeight, srcTrans->stride);
_mesa_generate_mipmap_level(target, datatype, comps,
0 /*border*/,
@ -248,7 +246,7 @@ fallback_generate_mipmap(struct gl_context *ctx, GLenum target,
dstWidth2); /* stride in texels */
/* compress the new image: dstTemp -> dstData */
compress_image(format, dstTemp, dstData, dstWidth, dstHeight);
compress_image(format, dstTemp, dstData, dstWidth, dstHeight, dstTrans->stride);
free(srcTemp);
free(dstTemp);