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-rw-r--r--src/mesa/state_tracker/st_cb_texture.c41
-rw-r--r--src/mesa/state_tracker/st_texture.h13
2 files changed, 31 insertions, 23 deletions
diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index b345b2c6d8b..ecd1f4ef339 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -207,9 +207,9 @@ st_FreeTextureImageBuffer(struct gl_context *ctx,
stImage->transfer = NULL;
stImage->num_transfers = 0;
- if (stImage->etc_data) {
- free(stImage->etc_data);
- stImage->etc_data = NULL;
+ if (stImage->compressed_data) {
+ free(stImage->compressed_data);
+ stImage->compressed_data = NULL;
}
/* if the texture image is being deallocated, the structure of the
@@ -231,22 +231,23 @@ st_compressed_format_fallback(struct st_context *st, mesa_format format)
}
static void
-etc_fallback_allocate(struct st_context *st, struct st_texture_image *stImage)
+compressed_tex_fallback_allocate(struct st_context *st,
+ struct st_texture_image *stImage)
{
struct gl_texture_image *texImage = &stImage->base;
if (!st_compressed_format_fallback(st, texImage->TexFormat))
return;
- if (stImage->etc_data)
- free(stImage->etc_data);
+ if (stImage->compressed_data)
+ free(stImage->compressed_data);
unsigned data_size = _mesa_format_image_size(texImage->TexFormat,
texImage->Width2,
texImage->Height2,
texImage->Depth2);
- stImage->etc_data =
+ stImage->compressed_data =
malloc(data_size * _mesa_num_tex_faces(texImage->TexObject->Target));
}
@@ -275,22 +276,28 @@ st_MapTextureImage(struct gl_context *ctx,
&transfer);
if (map) {
if (st_compressed_format_fallback(st, texImage->TexFormat)) {
- /* ETC isn't supported by all gallium drivers, where it's represented
- * by uncompressed formats. We store the compressed data (as it's
- * needed for image copies in OES_copy_image), and decompress as
- * necessary in Unmap.
+ /* Some compressed formats don't have to be supported by drivers,
+ * and st/mesa transparently handles decompression on upload (Unmap),
+ * so that drivers don't see the compressed formats.
*
- * Note: all ETC1/ETC2 formats have 4x4 block sizes.
+ * We store the compressed data (it's needed for glGetCompressedTex-
+ * Image and image copies in OES_copy_image).
*/
unsigned z = transfer->box.z;
struct st_texture_image_transfer *itransfer = &stImage->transfer[z];
- unsigned bytes = _mesa_get_format_bytes(texImage->TexFormat);
+ unsigned blk_w, blk_h;
+ _mesa_get_format_block_size(texImage->TexFormat, &blk_w, &blk_h);
+
+ unsigned y_blocks = DIV_ROUND_UP(texImage->Height2, blk_h);
unsigned stride = *rowStrideOut = itransfer->temp_stride =
_mesa_format_row_stride(texImage->TexFormat, texImage->Width2);
+ unsigned block_size = _mesa_get_format_bytes(texImage->TexFormat);
+
*mapOut = itransfer->temp_data =
- stImage->etc_data + ((x / 4) * bytes + (y / 4) * stride) +
- z * stride * texImage->Height2 / 4;
+ stImage->compressed_data +
+ (z * y_blocks + (y / blk_h)) * stride +
+ (x / blk_w) * block_size;
itransfer->map = map;
}
else {
@@ -631,7 +638,7 @@ st_AllocTextureImageBuffer(struct gl_context *ctx,
stObj->needs_validation = true;
- etc_fallback_allocate(st, stImage);
+ compressed_tex_fallback_allocate(st, stImage);
/* Look if the parent texture object has space for this image */
if (stObj->pt &&
@@ -2840,7 +2847,7 @@ st_texture_storage(struct gl_context *ctx,
st_texture_image(texObj->Image[face][level]);
pipe_resource_reference(&stImage->pt, stObj->pt);
- etc_fallback_allocate(st, stImage);
+ compressed_tex_fallback_allocate(st, stImage);
}
}
diff --git a/src/mesa/state_tracker/st_texture.h b/src/mesa/state_tracker/st_texture.h
index 82a5bc7797c..726ab78dad4 100644
--- a/src/mesa/state_tracker/st_texture.h
+++ b/src/mesa/state_tracker/st_texture.h
@@ -42,9 +42,9 @@ struct pipe_resource;
struct st_texture_image_transfer {
struct pipe_transfer *transfer;
- /* For ETC fallback. */
- GLubyte *temp_data; /**< Temporary ETC texture storage. */
- unsigned temp_stride; /**< Stride of the ETC texture storage. */
+ /* For compressed texture fallback. */
+ GLubyte *temp_data; /**< Temporary compressed texture storage. */
+ unsigned temp_stride; /**< Stride of the compressed texture storage. */
GLubyte *map; /**< Saved map pointer of the uncompressed transfer. */
};
@@ -90,10 +90,11 @@ struct st_texture_image
struct st_texture_image_transfer *transfer;
unsigned num_transfers;
- /* For ETC images, keep track of the original data. This is necessary for
- * mapping/unmapping, as well as image copies.
+ /* For compressed images unsupported by the driver. Keep track of
+ * the original data. This is necessary for mapping/unmapping,
+ * as well as image copies.
*/
- GLubyte *etc_data;
+ GLubyte *compressed_data;
};