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llvmpipe: fix surface memory allocation bug

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We weren't always allocating the right amount of memory for image tiles
for some formats (those < 32bpp).

Fixes fd.o bug 27712.
This commit is contained in:
Brian Paul
2010-04-19 11:17:11 -06:00
parent 64644ec3b2
commit 05bf77a2da
1 changed files with 36 additions and 12 deletions
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48
src/gallium/drivers/llvmpipe/lp_texture.c
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@@ -665,17 +665,35 @@ static unsigned
tex_image_face_size(const struct llvmpipe_resource *lpr, unsigned level,
enum lp_texture_layout layout)
{
/* for tiled layout, force a 32bpp format */
enum pipe_format format = layout == LP_TEX_LAYOUT_TILED
? PIPE_FORMAT_B8G8R8A8_UNORM : lpr->base.format;
const unsigned width = u_minify(lpr->base.width0, level);
const unsigned height = u_minify(lpr->base.height0, level);
const unsigned depth = u_minify(lpr->base.depth0, level);
const unsigned nblocksy =
util_format_get_nblocksy(format, align(height, TILE_SIZE));
const unsigned buffer_size =
nblocksy * lpr->stride[level] *
(lpr->base.target == PIPE_TEXTURE_3D ? depth : 1);
return buffer_size;
assert(layout == LP_TEX_LAYOUT_TILED ||
layout == LP_TEX_LAYOUT_LINEAR);
if (layout == LP_TEX_LAYOUT_TILED) {
/* for tiled layout, force a 32bpp format */
const enum pipe_format format = PIPE_FORMAT_B8G8R8A8_UNORM;
const unsigned block_size = util_format_get_blocksize(format);
const unsigned nblocksy =
util_format_get_nblocksy(format, align(height, TILE_SIZE));
const unsigned nblocksx =
util_format_get_nblocksx(format, align(width, TILE_SIZE));
const unsigned buffer_size =
block_size * nblocksy * nblocksx *
(lpr->base.target == PIPE_TEXTURE_3D ? depth : 1);
return buffer_size;
}
else {
const enum pipe_format format = lpr->base.format;
const unsigned nblocksy =
util_format_get_nblocksy(format, align(height, TILE_SIZE));
const unsigned buffer_size =
nblocksy * lpr->stride[level] *
(lpr->base.target == PIPE_TEXTURE_3D ? depth : 1);
return buffer_size;
}
}
@@ -784,7 +802,7 @@ llvmpipe_get_texture_image_address(struct llvmpipe_resource *lpr,
/**
* Return pointer to texture image data (either linear or tiled layout).
* \param usage one of LP_TEX_USAGE_READ/WRITE_ALL/READ_WRITE
* \param layout either LP_TEX_LAYOUT_LINEAR or LP_TEX_LAYOUT_TILED
* \param layout either LP_TEX_LAYOUT_LINEAR or _TILED or _NONE
*/
void *
llvmpipe_get_texture_image(struct llvmpipe_resource *lpr,
@@ -837,7 +855,11 @@ llvmpipe_get_texture_image(struct llvmpipe_resource *lpr,
if (!target_data) {
/* allocate memory for the target image now */
unsigned buffer_size = tex_image_size(lpr, level, layout);
unsigned buffer_size;
if (layout == LP_TEX_LAYOUT_LINEAR)
buffer_size = tex_image_size(lpr, level, LP_TEX_LAYOUT_LINEAR);
else
buffer_size = tex_image_size(lpr, level, LP_TEX_LAYOUT_TILED);
target_img->data = align_malloc(buffer_size, 16);
target_data = target_img->data;
}
@@ -853,7 +875,9 @@ llvmpipe_get_texture_image(struct llvmpipe_resource *lpr,
}
if (layout == LP_TEX_LAYOUT_NONE) {
/* just allocating memory */
/* Just allocating tiled memory. Don't initialize it from the the
* linear data if it exists.
*/
return target_data;
}