/**************************************************************************
*
- * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * Copyright 2007 VMware, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
- * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "lp_screen.h"
#include "lp_state.h"
#include "lp_debug.h"
-#include "state_tracker/sw_winsys.h"
+#include "frontend/sw_winsys.h"
+#include "lp_flush.h"
static void *
static void
llvmpipe_bind_sampler_states(struct pipe_context *pipe,
- unsigned num, void **sampler)
+ enum pipe_shader_type shader,
+ unsigned start,
+ unsigned num,
+ void **samplers)
{
struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
unsigned i;
- assert(num <= PIPE_MAX_SAMPLERS);
-
- /* Check for no-op */
- if (num == llvmpipe->num_samplers &&
- !memcmp(llvmpipe->sampler, sampler, num * sizeof(void *)))
- return;
-
- draw_flush(llvmpipe->draw);
-
- for (i = 0; i < num; ++i)
- llvmpipe->sampler[i] = sampler[i];
- for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
- llvmpipe->sampler[i] = NULL;
-
- llvmpipe->num_samplers = num;
-
- llvmpipe->dirty |= LP_NEW_SAMPLER;
-}
-
-
-static void
-llvmpipe_bind_vertex_sampler_states(struct pipe_context *pipe,
- unsigned num_samplers,
- void **samplers)
-{
- struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
- unsigned i;
-
- assert(num_samplers <= PIPE_MAX_VERTEX_SAMPLERS);
-
- /* Check for no-op */
- if (num_samplers == llvmpipe->num_vertex_samplers &&
- !memcmp(llvmpipe->vertex_samplers, samplers, num_samplers * sizeof(void *)))
- return;
+ assert(shader < PIPE_SHADER_TYPES);
+ assert(start + num <= ARRAY_SIZE(llvmpipe->samplers[shader]));
draw_flush(llvmpipe->draw);
- for (i = 0; i < num_samplers; ++i)
- llvmpipe->vertex_samplers[i] = samplers[i];
- for (i = num_samplers; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
- llvmpipe->vertex_samplers[i] = NULL;
-
- llvmpipe->num_vertex_samplers = num_samplers;
+ /* set the new samplers */
+ for (i = 0; i < num; i++) {
+ llvmpipe->samplers[shader][start + i] = samplers[i];
+ }
- draw_set_samplers(llvmpipe->draw,
- llvmpipe->vertex_samplers,
- llvmpipe->num_vertex_samplers);
+ /* find highest non-null samplers[] entry */
+ {
+ unsigned j = MAX2(llvmpipe->num_samplers[shader], start + num);
+ while (j > 0 && llvmpipe->samplers[shader][j - 1] == NULL)
+ j--;
+ llvmpipe->num_samplers[shader] = j;
+ }
- llvmpipe->dirty |= LP_NEW_SAMPLER;
+ if (shader == PIPE_SHADER_VERTEX ||
+ shader == PIPE_SHADER_GEOMETRY ||
+ shader == PIPE_SHADER_TESS_CTRL ||
+ shader == PIPE_SHADER_TESS_EVAL) {
+ draw_set_samplers(llvmpipe->draw,
+ shader,
+ llvmpipe->samplers[shader],
+ llvmpipe->num_samplers[shader]);
+ }
+ else if (shader == PIPE_SHADER_COMPUTE) {
+ llvmpipe->cs_dirty |= LP_CSNEW_SAMPLER;
+ } else {
+ llvmpipe->dirty |= LP_NEW_SAMPLER;
+ }
}
static void
-llvmpipe_bind_geometry_sampler_states(struct pipe_context *pipe,
- unsigned num, void **sampler)
-{
- /* XXX: implementation missing */
-}
-
-static void
-llvmpipe_set_fragment_sampler_views(struct pipe_context *pipe,
- unsigned num,
- struct pipe_sampler_view **views)
+llvmpipe_set_sampler_views(struct pipe_context *pipe,
+ enum pipe_shader_type shader,
+ unsigned start,
+ unsigned num,
+ struct pipe_sampler_view **views)
{
struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
uint i;
- assert(num <= PIPE_MAX_SAMPLERS);
+ assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
- /* Check for no-op */
- if (num == llvmpipe->num_fragment_sampler_views &&
- !memcmp(llvmpipe->fragment_sampler_views, views, num * sizeof(struct pipe_sampler_view *)))
- return;
+ assert(shader < PIPE_SHADER_TYPES);
+ assert(start + num <= ARRAY_SIZE(llvmpipe->sampler_views[shader]));
draw_flush(llvmpipe->draw);
- for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
- struct pipe_sampler_view *view = i < num ? views[i] : NULL;
+ /* set the new sampler views */
+ for (i = 0; i < num; i++) {
+ /*
+ * Warn if someone tries to set a view created in a different context
+ * (which is why we need the hack above in the first place).
+ * An assert would be better but st/mesa relies on it...
+ */
+ if (views[i] && views[i]->context != pipe) {
+ debug_printf("Illegal setting of sampler_view %d created in another "
+ "context\n", i);
+ }
- pipe_sampler_view_reference(&llvmpipe->fragment_sampler_views[i], view);
+ if (views[i])
+ llvmpipe_flush_resource(pipe, views[i]->texture, 0, true, false, false, "sampler_view");
+ pipe_sampler_view_reference(&llvmpipe->sampler_views[shader][start + i],
+ views[i]);
}
- llvmpipe->num_fragment_sampler_views = num;
-
- llvmpipe->dirty |= LP_NEW_SAMPLER_VIEW;
-}
-
-
-static void
-llvmpipe_set_vertex_sampler_views(struct pipe_context *pipe,
- unsigned num,
- struct pipe_sampler_view **views)
-{
- struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
- uint i;
-
- assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
-
- /* Check for no-op */
- if (num == llvmpipe->num_vertex_sampler_views &&
- !memcmp(llvmpipe->vertex_sampler_views, views, num * sizeof(struct pipe_sampler_view *))) {
- return;
+ /* find highest non-null sampler_views[] entry */
+ {
+ unsigned j = MAX2(llvmpipe->num_sampler_views[shader], start + num);
+ while (j > 0 && llvmpipe->sampler_views[shader][j - 1] == NULL)
+ j--;
+ llvmpipe->num_sampler_views[shader] = j;
}
- draw_flush(llvmpipe->draw);
-
- for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
- struct pipe_sampler_view *view = i < num ? views[i] : NULL;
-
- pipe_sampler_view_reference(&llvmpipe->vertex_sampler_views[i], view);
+ if (shader == PIPE_SHADER_VERTEX ||
+ shader == PIPE_SHADER_GEOMETRY ||
+ shader == PIPE_SHADER_TESS_CTRL ||
+ shader == PIPE_SHADER_TESS_EVAL) {
+ draw_set_sampler_views(llvmpipe->draw,
+ shader,
+ llvmpipe->sampler_views[shader],
+ llvmpipe->num_sampler_views[shader]);
+ }
+ else if (shader == PIPE_SHADER_COMPUTE) {
+ llvmpipe->cs_dirty |= LP_CSNEW_SAMPLER_VIEW;
+ } else {
+ llvmpipe->dirty |= LP_NEW_SAMPLER_VIEW;
}
-
- llvmpipe->num_vertex_sampler_views = num;
-
- draw_set_sampler_views(llvmpipe->draw,
- llvmpipe->vertex_sampler_views,
- llvmpipe->num_vertex_sampler_views);
-
- llvmpipe->dirty |= LP_NEW_SAMPLER_VIEW;
}
-static void
-llvmpipe_set_geometry_sampler_views(struct pipe_context *pipe,
- unsigned num,
- struct pipe_sampler_view **views)
-{
- /*XXX: implementation missing */
-}
-
static struct pipe_sampler_view *
llvmpipe_create_sampler_view(struct pipe_context *pipe,
struct pipe_resource *texture,
const struct pipe_sampler_view *templ)
{
struct pipe_sampler_view *view = CALLOC_STRUCT(pipe_sampler_view);
+ /*
+ * XXX: bind flags from OpenGL state tracker are notoriously unreliable.
+ * This looks unfixable, so fix the bind flags instead when it happens.
+ */
+ if (!(texture->bind & PIPE_BIND_SAMPLER_VIEW)) {
+ debug_printf("Illegal sampler view creation without bind flag\n");
+ texture->bind |= PIPE_BIND_SAMPLER_VIEW;
+ }
if (view) {
*view = *templ;
view->texture = NULL;
pipe_resource_reference(&view->texture, texture);
view->context = pipe;
+
+#ifdef DEBUG
+ /*
+ * This is possibly too lenient, but the primary reason is just
+ * to catch gallium frontends which forget to initialize this, so
+ * it only catches clearly impossible view targets.
+ */
+ if (view->target != texture->target) {
+ if (view->target == PIPE_TEXTURE_1D)
+ assert(texture->target == PIPE_TEXTURE_1D_ARRAY);
+ else if (view->target == PIPE_TEXTURE_1D_ARRAY)
+ assert(texture->target == PIPE_TEXTURE_1D);
+ else if (view->target == PIPE_TEXTURE_2D)
+ assert(texture->target == PIPE_TEXTURE_2D_ARRAY ||
+ texture->target == PIPE_TEXTURE_CUBE ||
+ texture->target == PIPE_TEXTURE_CUBE_ARRAY);
+ else if (view->target == PIPE_TEXTURE_2D_ARRAY)
+ assert(texture->target == PIPE_TEXTURE_2D ||
+ texture->target == PIPE_TEXTURE_CUBE ||
+ texture->target == PIPE_TEXTURE_CUBE_ARRAY);
+ else if (view->target == PIPE_TEXTURE_CUBE)
+ assert(texture->target == PIPE_TEXTURE_CUBE_ARRAY ||
+ texture->target == PIPE_TEXTURE_2D_ARRAY);
+ else if (view->target == PIPE_TEXTURE_CUBE_ARRAY)
+ assert(texture->target == PIPE_TEXTURE_CUBE ||
+ texture->target == PIPE_TEXTURE_2D_ARRAY);
+ else
+ assert(0);
+ }
+#endif
}
return view;
}
-/**
- * Called during state validation when LP_NEW_SAMPLER_VIEW is set.
- */
-void
-llvmpipe_prepare_vertex_sampling(struct llvmpipe_context *lp,
- unsigned num,
- struct pipe_sampler_view **views)
+static void
+prepare_shader_sampling(
+ struct llvmpipe_context *lp,
+ unsigned num,
+ struct pipe_sampler_view **views,
+ enum pipe_shader_type shader_type)
{
+
unsigned i;
- uint32_t row_stride[DRAW_MAX_TEXTURE_LEVELS];
- uint32_t img_stride[DRAW_MAX_TEXTURE_LEVELS];
- const void *data[DRAW_MAX_TEXTURE_LEVELS];
+ uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS];
+ uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS];
+ uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS];
+ const void *addr;
- assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
+ assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
if (!num)
return;
- for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
+ for (i = 0; i < num; i++) {
struct pipe_sampler_view *view = i < num ? views[i] : NULL;
if (view) {
struct pipe_resource *tex = view->texture;
struct llvmpipe_resource *lp_tex = llvmpipe_resource(tex);
-
- /* We're referencing the texture's internal data, so save a
- * reference to it.
- */
- pipe_resource_reference(&lp->mapped_vs_tex[i], tex);
+ unsigned width0 = tex->width0;
+ unsigned num_layers = tex->depth0;
+ unsigned first_level = 0;
+ unsigned last_level = 0;
+ unsigned sample_stride = 0;
+ unsigned num_samples = tex->nr_samples;
if (!lp_tex->dt) {
- /* regular texture - setup array of mipmap level pointers */
+ /* regular texture - setup array of mipmap level offsets */
+ struct pipe_resource *res = view->texture;
int j;
- for (j = 0; j <= tex->last_level; j++) {
- data[j] =
- llvmpipe_get_texture_image_all(lp_tex, j, LP_TEX_USAGE_READ,
- LP_TEX_LAYOUT_LINEAR);
- row_stride[j] = lp_tex->row_stride[j];
- img_stride[j] = lp_tex->img_stride[j];
+
+ if (llvmpipe_resource_is_texture(res)) {
+ first_level = view->u.tex.first_level;
+ last_level = view->u.tex.last_level;
+ assert(first_level <= last_level);
+ assert(last_level <= res->last_level);
+ addr = lp_tex->tex_data;
+
+ sample_stride = lp_tex->sample_stride;
+
+ for (j = first_level; j <= last_level; j++) {
+ mip_offsets[j] = lp_tex->mip_offsets[j];
+ row_stride[j] = lp_tex->row_stride[j];
+ img_stride[j] = lp_tex->img_stride[j];
+ }
+ if (tex->target == PIPE_TEXTURE_1D_ARRAY ||
+ tex->target == PIPE_TEXTURE_2D_ARRAY ||
+ tex->target == PIPE_TEXTURE_CUBE ||
+ tex->target == PIPE_TEXTURE_CUBE_ARRAY) {
+ num_layers = view->u.tex.last_layer - view->u.tex.first_layer + 1;
+ for (j = first_level; j <= last_level; j++) {
+ mip_offsets[j] += view->u.tex.first_layer *
+ lp_tex->img_stride[j];
+ }
+ if (view->target == PIPE_TEXTURE_CUBE ||
+ view->target == PIPE_TEXTURE_CUBE_ARRAY) {
+ assert(num_layers % 6 == 0);
+ }
+ assert(view->u.tex.first_layer <= view->u.tex.last_layer);
+ assert(view->u.tex.last_layer < res->array_size);
+ }
+ }
+ else {
+ unsigned view_blocksize = util_format_get_blocksize(view->format);
+ addr = lp_tex->data;
+ /* probably don't really need to fill that out */
+ mip_offsets[0] = 0;
+ row_stride[0] = 0;
+ img_stride[0] = 0;
+
+ /* everything specified in number of elements here. */
+ width0 = view->u.buf.size / view_blocksize;
+ addr = (uint8_t *)addr + view->u.buf.offset;
+ assert(view->u.buf.offset + view->u.buf.size <= res->width0);
}
}
else {
*/
struct llvmpipe_screen *screen = llvmpipe_screen(tex->screen);
struct sw_winsys *winsys = screen->winsys;
- data[0] = winsys->displaytarget_map(winsys, lp_tex->dt,
+ addr = winsys->displaytarget_map(winsys, lp_tex->dt,
PIPE_TRANSFER_READ);
row_stride[0] = lp_tex->row_stride[0];
img_stride[0] = lp_tex->img_stride[0];
- assert(data[0]);
+ mip_offsets[0] = 0;
+ assert(addr);
}
draw_set_mapped_texture(lp->draw,
+ shader_type,
i,
- tex->width0, tex->height0, tex->depth0,
- tex->last_level,
- row_stride, img_stride, data);
+ width0, tex->height0, num_layers,
+ first_level, last_level,
+ num_samples, sample_stride,
+ addr,
+ row_stride, img_stride, mip_offsets);
}
}
}
+
+/**
+ * Called whenever we're about to draw (no dirty flag, FIXME?).
+ */
+void
+llvmpipe_prepare_vertex_sampling(struct llvmpipe_context *lp,
+ unsigned num,
+ struct pipe_sampler_view **views)
+{
+ prepare_shader_sampling(lp, num, views, PIPE_SHADER_VERTEX);
+}
+
+
+/**
+ * Called whenever we're about to draw (no dirty flag, FIXME?).
+ */
+void
+llvmpipe_prepare_geometry_sampling(struct llvmpipe_context *lp,
+ unsigned num,
+ struct pipe_sampler_view **views)
+{
+ prepare_shader_sampling(lp, num, views, PIPE_SHADER_GEOMETRY);
+}
+
+/**
+ * Called whenever we're about to draw (no dirty flag, FIXME?).
+ */
+void
+llvmpipe_prepare_tess_ctrl_sampling(struct llvmpipe_context *lp,
+ unsigned num,
+ struct pipe_sampler_view **views)
+{
+ prepare_shader_sampling(lp, num, views, PIPE_SHADER_TESS_CTRL);
+}
+
+/**
+ * Called whenever we're about to draw (no dirty flag, FIXME?).
+ */
void
-llvmpipe_cleanup_vertex_sampling(struct llvmpipe_context *ctx)
+llvmpipe_prepare_tess_eval_sampling(struct llvmpipe_context *lp,
+ unsigned num,
+ struct pipe_sampler_view **views)
{
+ prepare_shader_sampling(lp, num, views, PIPE_SHADER_TESS_EVAL);
+}
+
+static void
+prepare_shader_images(
+ struct llvmpipe_context *lp,
+ unsigned num,
+ struct pipe_image_view *views,
+ enum pipe_shader_type shader_type)
+{
+
unsigned i;
- for (i = 0; i < Elements(ctx->mapped_vs_tex); i++) {
- pipe_resource_reference(&ctx->mapped_vs_tex[i], NULL);
+ uint32_t row_stride;
+ uint32_t img_stride;
+ uint32_t sample_stride;
+ const void *addr;
+
+ assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
+ if (!num)
+ return;
+
+ for (i = 0; i < num; i++) {
+ struct pipe_image_view *view = i < num ? &views[i] : NULL;
+
+ if (view) {
+ struct pipe_resource *img = view->resource;
+ struct llvmpipe_resource *lp_img = llvmpipe_resource(img);
+ if (!img)
+ continue;
+
+ unsigned width = u_minify(img->width0, view->u.tex.level);
+ unsigned height = u_minify(img->height0, view->u.tex.level);
+ unsigned num_layers = img->depth0;
+ unsigned num_samples = img->nr_samples;
+
+ if (!lp_img->dt) {
+ /* regular texture - setup array of mipmap level offsets */
+ struct pipe_resource *res = view->resource;
+
+ if (llvmpipe_resource_is_texture(res)) {
+ uint32_t mip_offset = lp_img->mip_offsets[view->u.tex.level];
+ addr = lp_img->tex_data;
+
+ if (img->target == PIPE_TEXTURE_1D_ARRAY ||
+ img->target == PIPE_TEXTURE_2D_ARRAY ||
+ img->target == PIPE_TEXTURE_3D ||
+ img->target == PIPE_TEXTURE_CUBE ||
+ img->target == PIPE_TEXTURE_CUBE_ARRAY) {
+ num_layers = view->u.tex.last_layer - view->u.tex.first_layer + 1;
+ assert(view->u.tex.first_layer <= view->u.tex.last_layer);
+ mip_offset += view->u.tex.first_layer * lp_img->img_stride[view->u.tex.level];
+ }
+
+ row_stride = lp_img->row_stride[view->u.tex.level];
+ img_stride = lp_img->img_stride[view->u.tex.level];
+ sample_stride = lp_img->sample_stride;
+ addr = (uint8_t *)addr + mip_offset;
+ }
+ else {
+ unsigned view_blocksize = util_format_get_blocksize(view->format);
+ addr = lp_img->data;
+ /* probably don't really need to fill that out */
+ row_stride = 0;
+ img_stride = 0;
+ sample_stride = 0;
+
+ /* everything specified in number of elements here. */
+ width = view->u.buf.size / view_blocksize;
+ addr = (uint8_t *)addr + view->u.buf.offset;
+ assert(view->u.buf.offset + view->u.buf.size <= res->width0);
+ }
+ }
+ else {
+ /* display target texture/surface */
+ /*
+ * XXX: Where should this be unmapped?
+ */
+ struct llvmpipe_screen *screen = llvmpipe_screen(img->screen);
+ struct sw_winsys *winsys = screen->winsys;
+ addr = winsys->displaytarget_map(winsys, lp_img->dt,
+ PIPE_TRANSFER_READ);
+ row_stride = lp_img->row_stride[0];
+ img_stride = lp_img->img_stride[0];
+ sample_stride = 0;
+ assert(addr);
+ }
+ draw_set_mapped_image(lp->draw,
+ shader_type,
+ i,
+ width, height, num_layers,
+ addr,
+ row_stride, img_stride,
+ num_samples, sample_stride);
+ }
}
}
+
+/**
+ * Called whenever we're about to draw (no dirty flag, FIXME?).
+ */
+void
+llvmpipe_prepare_vertex_images(struct llvmpipe_context *lp,
+ unsigned num,
+ struct pipe_image_view *views)
+{
+ prepare_shader_images(lp, num, views, PIPE_SHADER_VERTEX);
+}
+
+
+/**
+ * Called whenever we're about to draw (no dirty flag, FIXME?).
+ */
+void
+llvmpipe_prepare_geometry_images(struct llvmpipe_context *lp,
+ unsigned num,
+ struct pipe_image_view *views)
+{
+ prepare_shader_images(lp, num, views, PIPE_SHADER_GEOMETRY);
+}
+
+/**
+ * Called whenever we're about to draw (no dirty flag, FIXME?).
+ */
+void
+llvmpipe_prepare_tess_ctrl_images(struct llvmpipe_context *lp,
+ unsigned num,
+ struct pipe_image_view *views)
+{
+ prepare_shader_images(lp, num, views, PIPE_SHADER_TESS_CTRL);
+}
+
+/**
+ * Called whenever we're about to draw (no dirty flag, FIXME?).
+ */
+void
+llvmpipe_prepare_tess_eval_images(struct llvmpipe_context *lp,
+ unsigned num,
+ struct pipe_image_view *views)
+{
+ prepare_shader_images(lp, num, views, PIPE_SHADER_TESS_EVAL);
+}
+
void
llvmpipe_init_sampler_funcs(struct llvmpipe_context *llvmpipe)
{
llvmpipe->pipe.create_sampler_state = llvmpipe_create_sampler_state;
- llvmpipe->pipe.bind_fragment_sampler_states = llvmpipe_bind_sampler_states;
- llvmpipe->pipe.bind_vertex_sampler_states = llvmpipe_bind_vertex_sampler_states;
- llvmpipe->pipe.bind_geometry_sampler_states = llvmpipe_bind_geometry_sampler_states;
- llvmpipe->pipe.set_fragment_sampler_views = llvmpipe_set_fragment_sampler_views;
- llvmpipe->pipe.set_vertex_sampler_views = llvmpipe_set_vertex_sampler_views;
- llvmpipe->pipe.set_geometry_sampler_views = llvmpipe_set_geometry_sampler_views;
+ llvmpipe->pipe.bind_sampler_states = llvmpipe_bind_sampler_states;
llvmpipe->pipe.create_sampler_view = llvmpipe_create_sampler_view;
+ llvmpipe->pipe.set_sampler_views = llvmpipe_set_sampler_views;
llvmpipe->pipe.sampler_view_destroy = llvmpipe_sampler_view_destroy;
llvmpipe->pipe.delete_sampler_state = llvmpipe_delete_sampler_state;
}
projects / mesa.git / blobdiff