struct pipe_transfer*
r300_texture_get_transfer(struct pipe_context *ctx,
struct pipe_resource *texture,
unsigned level,
unsigned usage,
const struct pipe_box *box)
{
struct r300_context *r300 = r300_context(ctx);
struct r300_resource *tex = r300_resource(texture);
struct r300_transfer *trans;
struct pipe_resource base;
boolean referenced_cs, referenced_hw, blittable;
const struct util_format_description *desc =
util_format_description(texture->format);
referenced_cs =
r300->rws->cs_is_buffer_referenced(r300->cs, tex->cs_buf);
if (referenced_cs) {
referenced_hw = TRUE;
} else {
referenced_hw =
r300->rws->buffer_is_busy(tex->buf, RADEON_USAGE_READWRITE);
}
blittable = desc->layout == UTIL_FORMAT_LAYOUT_PLAIN ||
desc->layout == UTIL_FORMAT_LAYOUT_S3TC ||
desc->layout == UTIL_FORMAT_LAYOUT_RGTC;
trans = CALLOC_STRUCT(r300_transfer);
if (trans) {
/* Initialize the transfer object. */
pipe_resource_reference(&trans->transfer.resource, texture);
trans->transfer.level = level;
trans->transfer.usage = usage;
trans->transfer.box = *box;
/* If the texture is tiled, we must create a temporary detiled texture
* for this transfer.
* Also make write transfers pipelined. */
if (tex->tex.microtile || tex->tex.macrotile[level] ||
(referenced_hw && blittable && !(usage & PIPE_TRANSFER_READ))) {
if (r300->blitter->running) {
fprintf(stderr, "r300: ERROR: Blitter recursion in texture_get_transfer.\n");
os_break();
}
base.target = PIPE_TEXTURE_2D;
base.format = texture->format;
base.width0 = box->width;
base.height0 = box->height;
base.depth0 = 1;
base.array_size = 1;
base.last_level = 0;
base.nr_samples = 0;
base.usage = PIPE_USAGE_DYNAMIC;
base.bind = 0;
base.flags = R300_RESOURCE_FLAG_TRANSFER;
/* For texture reading, the temporary (detiled) texture is used as
* a render target when blitting from a tiled texture. */
if (usage & PIPE_TRANSFER_READ) {
base.bind |= PIPE_BIND_RENDER_TARGET;
}
/* For texture writing, the temporary texture is used as a sampler
* when blitting into a tiled texture. */
if (usage & PIPE_TRANSFER_WRITE) {
base.bind |= PIPE_BIND_SAMPLER_VIEW;
}
/* Create the temporary texture. */
trans->linear_texture = r300_resource(
ctx->screen->resource_create(ctx->screen,
&base));
if (!trans->linear_texture) {
/* Oh crap, the thing can't create the texture.
* Let's flush and try again. */
r300_flush(ctx, 0, NULL);
trans->linear_texture = r300_resource(
ctx->screen->resource_create(ctx->screen,
&base));
if (!trans->linear_texture) {
/* For linear textures, it's safe to fallback to
* an unpipelined transfer. */
if (!tex->tex.microtile && !tex->tex.macrotile[level]) {
goto unpipelined;
}
/* Otherwise, go to hell. */
fprintf(stderr,
"r300: Failed to create a transfer object, praise.\n");
FREE(trans);
return NULL;
}
}
assert(!trans->linear_texture->tex.microtile &&
!trans->linear_texture->tex.macrotile[0]);
/* Set the stride. */
trans->transfer.stride =
trans->linear_texture->tex.stride_in_bytes[0];
if (usage & PIPE_TRANSFER_READ) {
/* We cannot map a tiled texture directly because the data is
* in a different order, therefore we do detiling using a blit. */
r300_copy_from_tiled_texture(ctx, trans);
/* Always referenced in the blit. */
r300_flush(ctx, 0, NULL);
}
return &trans->transfer;
}
unpipelined:
/* Unpipelined transfer. */
trans->transfer.stride = tex->tex.stride_in_bytes[level];
trans->offset = r300_texture_get_offset(tex, level, box->z);
if (referenced_cs &&
!(usage & PIPE_TRANSFER_UNSYNCHRONIZED))
r300_flush(ctx, 0, NULL);
return &trans->transfer;
}
return NULL;
}
void *
r300_texture_transfer_map(struct pipe_context *ctx,
struct pipe_resource *texture,
unsigned level,
unsigned usage,
const struct pipe_box *box,
struct pipe_transfer **transfer)
{
struct r300_context *r300 = r300_context(ctx);
struct r300_resource *tex = r300_resource(texture);
struct r300_transfer *trans;
struct pipe_resource base;
boolean referenced_cs, referenced_hw;
enum pipe_format format = tex->b.b.format;
char *map;
referenced_cs =
r300->rws->cs_is_buffer_referenced(r300->cs, tex->cs_buf, RADEON_USAGE_READWRITE);
if (referenced_cs) {
referenced_hw = TRUE;
} else {
referenced_hw =
r300->rws->buffer_is_busy(tex->buf, RADEON_USAGE_READWRITE);
}
trans = CALLOC_STRUCT(r300_transfer);
if (trans) {
/* Initialize the transfer object. */
trans->transfer.resource = texture;
trans->transfer.level = level;
trans->transfer.usage = usage;
trans->transfer.box = *box;
/* If the texture is tiled, we must create a temporary detiled texture
* for this transfer.
* Also make write transfers pipelined. */
if (tex->tex.microtile || tex->tex.macrotile[level] ||
(referenced_hw && !(usage & PIPE_TRANSFER_READ) &&
r300_is_blit_supported(texture->format))) {
if (r300->blitter->running) {
fprintf(stderr, "r300: ERROR: Blitter recursion in texture_get_transfer.\n");
os_break();
}
base.target = PIPE_TEXTURE_2D;
base.format = texture->format;
base.width0 = box->width;
base.height0 = box->height;
base.depth0 = 1;
base.array_size = 1;
base.last_level = 0;
base.nr_samples = 0;
base.usage = PIPE_USAGE_STAGING;
base.bind = 0;
if (usage & PIPE_TRANSFER_READ) {
base.bind |= PIPE_BIND_SAMPLER_VIEW;
}
if (usage & PIPE_TRANSFER_WRITE) {
base.bind |= PIPE_BIND_RENDER_TARGET;
}
base.flags = R300_RESOURCE_FLAG_TRANSFER;
/* For texture reading, the temporary (detiled) texture is used as
* a render target when blitting from a tiled texture. */
if (usage & PIPE_TRANSFER_READ) {
base.bind |= PIPE_BIND_RENDER_TARGET;
}
/* For texture writing, the temporary texture is used as a sampler
* when blitting into a tiled texture. */
if (usage & PIPE_TRANSFER_WRITE) {
base.bind |= PIPE_BIND_SAMPLER_VIEW;
}
/* Create the temporary texture. */
trans->linear_texture = r300_resource(
ctx->screen->resource_create(ctx->screen,
&base));
if (!trans->linear_texture) {
/* Oh crap, the thing can't create the texture.
* Let's flush and try again. */
r300_flush(ctx, 0, NULL);
trans->linear_texture = r300_resource(
ctx->screen->resource_create(ctx->screen,
&base));
if (!trans->linear_texture) {
fprintf(stderr,
"r300: Failed to create a transfer object.\n");
FREE(trans);
return NULL;
}
}
assert(!trans->linear_texture->tex.microtile &&
!trans->linear_texture->tex.macrotile[0]);
/* Set the stride. */
trans->transfer.stride =
trans->linear_texture->tex.stride_in_bytes[0];
if (usage & PIPE_TRANSFER_READ) {
/* We cannot map a tiled texture directly because the data is
* in a different order, therefore we do detiling using a blit. */
r300_copy_from_tiled_texture(ctx, trans);
/* Always referenced in the blit. */
r300_flush(ctx, 0, NULL);
}
} else {
/* Unpipelined transfer. */
trans->transfer.stride = tex->tex.stride_in_bytes[level];
trans->offset = r300_texture_get_offset(tex, level, box->z);
if (referenced_cs &&
!(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
r300_flush(ctx, 0, NULL);
}
}
}
if (trans->linear_texture) {
/* The detiled texture is of the same size as the region being mapped
* (no offset needed). */
map = r300->rws->buffer_map(trans->linear_texture->cs_buf,
r300->cs, usage);
if (!map) {
pipe_resource_reference(
(struct pipe_resource**)&trans->linear_texture, NULL);
FREE(trans);
return NULL;
}
*transfer = &trans->transfer;
return map;
} else {
/* Tiling is disabled. */
map = r300->rws->buffer_map(tex->cs_buf, r300->cs, usage);
if (!map) {
FREE(trans);
return NULL;
}
*transfer = &trans->transfer;
return map + trans->offset +
box->y / util_format_get_blockheight(format) * trans->transfer.stride +
box->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
}
}
