src/gallium/drivers/radeonsi/r600_blit.c - platform/external/mesa3d - Git at Google

 /*
  * Copyright 2010 Jerome Glisse <glisse@freedesktop.org>
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
  * copy of this software and associated documentation files (the "Software"),
  * to deal in the Software without restriction, including without limitation
  * on the rights to use, copy, modify, merge, publish, distribute, sub
  * license, and/or sell copies of the Software, and to permit persons to whom
  * the Software is furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice (including the next
  * paragraph) shall be included in all copies or substantial portions of the
  * Software.
  *
  * 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
  * THE AUTHOR(S) AND/OR THEIR 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 "util/u_surface.h"
 #include "util/u_blitter.h"
 #include "util/u_format.h"
 #include "radeonsi_pipe.h"
 #include "si_state.h"

 enum r600_blitter_op /* bitmask */
 {
 	R600_SAVE_TEXTURES      = 1,
 	R600_SAVE_FRAMEBUFFER   = 2,
 	R600_DISABLE_RENDER_COND = 4,

 	R600_CLEAR         = 0,

 	R600_CLEAR_SURFACE = R600_SAVE_FRAMEBUFFER,

 	R600_COPY          = R600_SAVE_FRAMEBUFFER | R600_SAVE_TEXTURES |
 			     R600_DISABLE_RENDER_COND,

 	R600_DECOMPRESS    = R600_SAVE_FRAMEBUFFER | R600_DISABLE_RENDER_COND,
 };

 static void r600_blitter_begin(struct pipe_context *ctx, enum r600_blitter_op op)
 {
 	struct r600_context *rctx = (struct r600_context *)ctx;

 	r600_context_queries_suspend(rctx);

 	util_blitter_save_blend(rctx->blitter, rctx->queued.named.blend);
 	util_blitter_save_depth_stencil_alpha(rctx->blitter, rctx->queued.named.dsa);
 	util_blitter_save_stencil_ref(rctx->blitter, &rctx->stencil_ref);
 	util_blitter_save_rasterizer(rctx->blitter, rctx->queued.named.rasterizer);
 	util_blitter_save_fragment_shader(rctx->blitter, rctx->ps_shader);
 	util_blitter_save_vertex_shader(rctx->blitter, rctx->vs_shader);
 	util_blitter_save_vertex_elements(rctx->blitter, rctx->vertex_elements);
 	if (rctx->queued.named.viewport) {
 		util_blitter_save_viewport(rctx->blitter, &rctx->queued.named.viewport->viewport);
 	}
 	util_blitter_save_vertex_buffers(rctx->blitter,
 					 rctx->nr_vertex_buffers,
 					 rctx->vertex_buffer);
 	util_blitter_save_so_targets(rctx->blitter, rctx->num_so_targets,
 				     (struct pipe_stream_output_target**)rctx->so_targets);

 	if (op & R600_SAVE_FRAMEBUFFER)
 		util_blitter_save_framebuffer(rctx->blitter, &rctx->framebuffer);

 	if (op & R600_SAVE_TEXTURES) {
 		util_blitter_save_fragment_sampler_states(
 			rctx->blitter, rctx->ps_samplers.n_samplers,
 			(void**)rctx->ps_samplers.samplers);

 		util_blitter_save_fragment_sampler_views(
 			rctx->blitter, rctx->ps_samplers.n_views,
 			(struct pipe_sampler_view**)rctx->ps_samplers.views);
 	}

 	if ((op & R600_DISABLE_RENDER_COND) && rctx->current_render_cond) {
 		rctx->saved_render_cond = rctx->current_render_cond;
 		rctx->saved_render_cond_mode = rctx->current_render_cond_mode;
 		rctx->context.render_condition(&rctx->context, NULL, 0);
 	}

 }

 static void r600_blitter_end(struct pipe_context *ctx)
 {
 	struct r600_context *rctx = (struct r600_context *)ctx;
 	if (rctx->saved_render_cond) {
 		rctx->context.render_condition(&rctx->context,
 					       rctx->saved_render_cond,
 					       rctx->saved_render_cond_mode);
 		rctx->saved_render_cond = NULL;
 	}
 	r600_context_queries_resume(rctx);
 }

 static unsigned u_num_layers(struct pipe_resource *r, unsigned level)
 {
 	switch (r->target) {
 	case PIPE_TEXTURE_CUBE:
 		return 6;
 	case PIPE_TEXTURE_3D:
 		return u_minify(r->depth0, level);
 	case PIPE_TEXTURE_1D_ARRAY:
 		return r->array_size;
 	case PIPE_TEXTURE_2D_ARRAY:
 		return r->array_size;
 	default:
 		return 1;
 	}
 }

 void si_blit_uncompress_depth(struct pipe_context *ctx, struct r600_resource_texture *texture)
 {
 	struct r600_context *rctx = (struct r600_context *)ctx;
 	unsigned layer, level;
 	float depth = 1.0f;

 	if (!texture->dirty_db)
 		return;

 	for (level = 0; level <= texture->resource.b.b.last_level; level++) {
 		unsigned num_layers = u_num_layers(&texture->resource.b.b, level);

 		for (layer = 0; layer < num_layers; layer++) {
 			struct pipe_surface *zsurf, *cbsurf, surf_tmpl;

 			surf_tmpl.format = texture->real_format;
 			surf_tmpl.u.tex.level = level;
 			surf_tmpl.u.tex.first_layer = layer;
 			surf_tmpl.u.tex.last_layer = layer;
 			surf_tmpl.usage = PIPE_BIND_DEPTH_STENCIL;

 			zsurf = ctx->create_surface(ctx, &texture->resource.b.b, &surf_tmpl);

 			surf_tmpl.format = texture->flushed_depth_texture->real_format;
 			surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
 			cbsurf = ctx->create_surface(ctx,
 					(struct pipe_resource*)texture->flushed_depth_texture, &surf_tmpl);

 			r600_blitter_begin(ctx, R600_DECOMPRESS);
 			util_blitter_custom_depth_stencil(rctx->blitter, zsurf, cbsurf, ~0, rctx->custom_dsa_flush, depth);
 			r600_blitter_end(ctx);

 			pipe_surface_reference(&zsurf, NULL);
 			pipe_surface_reference(&cbsurf, NULL);
 		}
 	}

 	texture->dirty_db = FALSE;
 }

 void si_flush_depth_textures(struct r600_context *rctx)
 {
 	unsigned int i;

 	/* FIXME: This handles fragment shader textures only. */

 	for (i = 0; i < rctx->ps_samplers.n_views; ++i) {
 		struct si_pipe_sampler_view *view;
 		struct r600_resource_texture *tex;

 		view = rctx->ps_samplers.views[i];
 		if (!view) continue;

 		tex = (struct r600_resource_texture *)view->base.texture;
 		if (!tex->depth)
 			continue;

 		if (tex->is_flushing_texture)
 			continue;

 		si_blit_uncompress_depth(&rctx->context, tex);
 	}

 	/* also check CB here */
 	for (i = 0; i < rctx->framebuffer.nr_cbufs; i++) {
 		struct r600_resource_texture *tex;
 		tex = (struct r600_resource_texture *)rctx->framebuffer.cbufs[i]->texture;

 		if (!tex->depth)
 			continue;

 		if (tex->is_flushing_texture)
 			continue;

 		si_blit_uncompress_depth(&rctx->context, tex);
 	}
 }

 static void r600_clear(struct pipe_context *ctx, unsigned buffers,
 		       const union pipe_color_union *color,
 		       double depth, unsigned stencil)
 {
 	struct r600_context *rctx = (struct r600_context *)ctx;
 	struct pipe_framebuffer_state *fb = &rctx->framebuffer;

 	r600_blitter_begin(ctx, R600_CLEAR);
 	util_blitter_clear(rctx->blitter, fb->width, fb->height,
 			   fb->nr_cbufs, buffers, fb->nr_cbufs ? fb->cbufs[0]->format : PIPE_FORMAT_NONE,
 			   color, depth, stencil);
 	r600_blitter_end(ctx);
 }

 static void r600_clear_render_target(struct pipe_context *ctx,
 				     struct pipe_surface *dst,
 				     const union pipe_color_union *color,
 				     unsigned dstx, unsigned dsty,
 				     unsigned width, unsigned height)
 {
 	struct r600_context *rctx = (struct r600_context *)ctx;

 	r600_blitter_begin(ctx, R600_CLEAR_SURFACE);
 	util_blitter_clear_render_target(rctx->blitter, dst, color,
 					 dstx, dsty, width, height);
 	r600_blitter_end(ctx);
 }

 static void r600_clear_depth_stencil(struct pipe_context *ctx,
 				     struct pipe_surface *dst,
 				     unsigned clear_flags,
 				     double depth,
 				     unsigned stencil,
 				     unsigned dstx, unsigned dsty,
 				     unsigned width, unsigned height)
 {
 	struct r600_context *rctx = (struct r600_context *)ctx;

 	r600_blitter_begin(ctx, R600_CLEAR_SURFACE);
 	util_blitter_clear_depth_stencil(rctx->blitter, dst, clear_flags, depth, stencil,
 					 dstx, dsty, width, height);
 	r600_blitter_end(ctx);
 }


 /* Copy a block of pixels from one surface to another using HW. */
 static void r600_hw_copy_region(struct pipe_context *ctx,
 				struct pipe_resource *dst,
 				unsigned dst_level,
 				unsigned dstx, unsigned dsty, unsigned dstz,
 				struct pipe_resource *src,
 				unsigned src_level,
 				const struct pipe_box *src_box)
 {
 	struct r600_context *rctx = (struct r600_context *)ctx;

 	r600_blitter_begin(ctx, R600_COPY);
 	util_blitter_copy_texture(rctx->blitter, dst, dst_level, ~0, dstx, dsty, dstz,
 				  src, src_level, 0, src_box);
 	r600_blitter_end(ctx);
 }

 struct texture_orig_info {
 	unsigned format;
 	unsigned width0;
 	unsigned height0;
 	unsigned npix_x;
 	unsigned npix_y;
 	unsigned npix0_x;
 	unsigned npix0_y;
 };

 static void r600_compressed_to_blittable(struct pipe_resource *tex,
 				   unsigned level,
 				   struct texture_orig_info *orig)
 {
 	struct r600_resource_texture *rtex = (struct r600_resource_texture*)tex;
 	struct r600_screen *rscreen = (struct r600_screen *)tex->screen;
 	unsigned pixsize = util_format_get_blocksize(rtex->real_format);
 	int new_format;
 	int new_height, new_width;

 	orig->format = tex->format;
 	orig->width0 = tex->width0;
 	orig->height0 = tex->height0;
 	orig->npix0_x = rtex->surface.level[0].npix_x;
 	orig->npix0_y = rtex->surface.level[0].npix_y;
 	orig->npix_x = rtex->surface.level[level].npix_x;
 	orig->npix_y = rtex->surface.level[level].npix_y;

 	if (pixsize == 8)
 		new_format = PIPE_FORMAT_R16G16B16A16_UINT; /* 64-bit block */
 	else
 		new_format = PIPE_FORMAT_R32G32B32A32_UINT; /* 128-bit block */

 	new_width = util_format_get_nblocksx(tex->format, orig->width0);
 	new_height = util_format_get_nblocksy(tex->format, orig->height0);

 	tex->width0 = new_width;
 	tex->height0 = new_height;
 	tex->format = new_format;
 	rtex->surface.level[0].npix_x = util_format_get_nblocksx(orig->format, orig->npix0_x);
 	rtex->surface.level[0].npix_y = util_format_get_nblocksy(orig->format, orig->npix0_y);
 	rtex->surface.level[level].npix_x = util_format_get_nblocksx(orig->format, orig->npix_x);
 	rtex->surface.level[level].npix_y = util_format_get_nblocksy(orig->format, orig->npix_y);
 }

 static void r600_reset_blittable_to_compressed(struct pipe_resource *tex,
 					       unsigned level,
 					       struct texture_orig_info *orig)
 {
 	struct r600_resource_texture *rtex = (struct r600_resource_texture*)tex;
 	struct r600_screen *rscreen = (struct r600_screen *)tex->screen;

 	tex->format = orig->format;
 	tex->width0 = orig->width0;
 	tex->height0 = orig->height0;
 	rtex->surface.level[0].npix_x = orig->npix0_x;
 	rtex->surface.level[0].npix_y = orig->npix0_y;
 	rtex->surface.level[level].npix_x = orig->npix_x;
 	rtex->surface.level[level].npix_y = orig->npix_y;
 }

 static void r600_resource_copy_region(struct pipe_context *ctx,
 				      struct pipe_resource *dst,
 				      unsigned dst_level,
 				      unsigned dstx, unsigned dsty, unsigned dstz,
 				      struct pipe_resource *src,
 				      unsigned src_level,
 				      const struct pipe_box *src_box)
 {
 	struct r600_resource_texture *rsrc = (struct r600_resource_texture*)src;
 	struct texture_orig_info orig_info[2];
 	struct pipe_box sbox;
 	const struct pipe_box *psbox;
 	boolean restore_orig[2];

 	memset(orig_info, 0, sizeof(orig_info));

 	/* Fallback for buffers. */
 	if (dst->target == PIPE_BUFFER && src->target == PIPE_BUFFER) {
 		util_resource_copy_region(ctx, dst, dst_level, dstx, dsty, dstz,
                                           src, src_level, src_box);
 		return;
 	}

 	if (rsrc->depth && !rsrc->is_flushing_texture)
 		r600_texture_depth_flush(ctx, src, FALSE);

 	restore_orig[0] = restore_orig[1] = FALSE;

 	if (util_format_is_compressed(src->format)) {
 		r600_compressed_to_blittable(src, src_level, &orig_info[0]);
 		restore_orig[0] = TRUE;
 		sbox.x = util_format_get_nblocksx(orig_info[0].format, src_box->x);
 		sbox.y = util_format_get_nblocksy(orig_info[0].format, src_box->y);
 		sbox.z = src_box->z;
 		sbox.width = util_format_get_nblocksx(orig_info[0].format, src_box->width);
 		sbox.height = util_format_get_nblocksy(orig_info[0].format, src_box->height);
 		sbox.depth = src_box->depth;
 		psbox=&sbox;
 	} else
 		psbox=src_box;

 	if (util_format_is_compressed(dst->format)) {
 		r600_compressed_to_blittable(dst, dst_level, &orig_info[1]);
 		restore_orig[1] = TRUE;
 		/* translate the dst box as well */
 		dstx = util_format_get_nblocksx(orig_info[1].format, dstx);
 		dsty = util_format_get_nblocksy(orig_info[1].format, dsty);
 	}

 	r600_hw_copy_region(ctx, dst, dst_level, dstx, dsty, dstz,
 			    src, src_level, psbox);

 	if (restore_orig[0])
 		r600_reset_blittable_to_compressed(src, src_level, &orig_info[0]);

 	if (restore_orig[1])
 		r600_reset_blittable_to_compressed(dst, dst_level, &orig_info[1]);
 }

 void si_init_blit_functions(struct r600_context *rctx)
 {
 	rctx->context.clear = r600_clear;
 	rctx->context.clear_render_target = r600_clear_render_target;
 	rctx->context.clear_depth_stencil = r600_clear_depth_stencil;
 	rctx->context.resource_copy_region = r600_resource_copy_region;
 }

 void r600_blit_push_depth(struct pipe_context *ctx, struct r600_resource_texture *texture)
 {
 	struct pipe_box sbox;

 	sbox.x = sbox.y = sbox.z = 0;
 	sbox.width = texture->resource.b.b.width0;
 	sbox.height = texture->resource.b.b.height0;
 	/* XXX that might be wrong */
 	sbox.depth = 1;

 	r600_hw_copy_region(ctx, (struct pipe_resource *)texture, 0,
 			    0, 0, 0,
 			    (struct pipe_resource *)texture->flushed_depth_texture, 0,
 			    &sbox);
 }
	/*
	* Copyright 2010 Jerome Glisse <glisse@freedesktop.org>
	*
	* Permission is hereby granted, free of charge, to any person obtaining a
	* copy of this software and associated documentation files (the "Software"),
	* to deal in the Software without restriction, including without limitation
	* on the rights to use, copy, modify, merge, publish, distribute, sub
	* license, and/or sell copies of the Software, and to permit persons to whom
	* the Software is furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice (including the next
	* paragraph) shall be included in all copies or substantial portions of the
	* Software.
	*
	* 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
	* THE AUTHOR(S) AND/OR THEIR 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 "util/u_surface.h"
	#include "util/u_blitter.h"
	#include "util/u_format.h"
	#include "radeonsi_pipe.h"
	#include "si_state.h"

	enum r600_blitter_op /* bitmask */
	{
	R600_SAVE_TEXTURES = 1,
	R600_SAVE_FRAMEBUFFER = 2,
	R600_DISABLE_RENDER_COND = 4,

	R600_CLEAR = 0,

	R600_CLEAR_SURFACE = R600_SAVE_FRAMEBUFFER,

	R600_COPY = R600_SAVE_FRAMEBUFFER \| R600_SAVE_TEXTURES \|
	R600_DISABLE_RENDER_COND,

	R600_DECOMPRESS = R600_SAVE_FRAMEBUFFER \| R600_DISABLE_RENDER_COND,
	};

	static void r600_blitter_begin(struct pipe_context *ctx, enum r600_blitter_op op)
	{
	struct r600_context rctx = (struct r600_context )ctx;

	r600_context_queries_suspend(rctx);

	util_blitter_save_blend(rctx->blitter, rctx->queued.named.blend);
	util_blitter_save_depth_stencil_alpha(rctx->blitter, rctx->queued.named.dsa);
	util_blitter_save_stencil_ref(rctx->blitter, &rctx->stencil_ref);
	util_blitter_save_rasterizer(rctx->blitter, rctx->queued.named.rasterizer);
	util_blitter_save_fragment_shader(rctx->blitter, rctx->ps_shader);
	util_blitter_save_vertex_shader(rctx->blitter, rctx->vs_shader);
	util_blitter_save_vertex_elements(rctx->blitter, rctx->vertex_elements);
	if (rctx->queued.named.viewport) {
	util_blitter_save_viewport(rctx->blitter, &rctx->queued.named.viewport->viewport);
	}
	util_blitter_save_vertex_buffers(rctx->blitter,
	rctx->nr_vertex_buffers,
	rctx->vertex_buffer);
	util_blitter_save_so_targets(rctx->blitter, rctx->num_so_targets,
	(struct pipe_stream_output_target**)rctx->so_targets);

	if (op & R600_SAVE_FRAMEBUFFER)
	util_blitter_save_framebuffer(rctx->blitter, &rctx->framebuffer);

	if (op & R600_SAVE_TEXTURES) {
	util_blitter_save_fragment_sampler_states(
	rctx->blitter, rctx->ps_samplers.n_samplers,
	(void**)rctx->ps_samplers.samplers);

	util_blitter_save_fragment_sampler_views(
	rctx->blitter, rctx->ps_samplers.n_views,
	(struct pipe_sampler_view**)rctx->ps_samplers.views);
	}

	if ((op & R600_DISABLE_RENDER_COND) && rctx->current_render_cond) {
	rctx->saved_render_cond = rctx->current_render_cond;
	rctx->saved_render_cond_mode = rctx->current_render_cond_mode;
	rctx->context.render_condition(&rctx->context, NULL, 0);
	}

	}

	static void r600_blitter_end(struct pipe_context *ctx)
	{
	struct r600_context rctx = (struct r600_context )ctx;
	if (rctx->saved_render_cond) {
	rctx->context.render_condition(&rctx->context,
	rctx->saved_render_cond,
	rctx->saved_render_cond_mode);
	rctx->saved_render_cond = NULL;
	}
	r600_context_queries_resume(rctx);
	}

	static unsigned u_num_layers(struct pipe_resource *r, unsigned level)
	{
	switch (r->target) {
	case PIPE_TEXTURE_CUBE:
	return 6;
	case PIPE_TEXTURE_3D:
	return u_minify(r->depth0, level);
	case PIPE_TEXTURE_1D_ARRAY:
	return r->array_size;
	case PIPE_TEXTURE_2D_ARRAY:
	return r->array_size;
	default:
	return 1;
	}
	}

	void si_blit_uncompress_depth(struct pipe_context ctx, struct r600_resource_texture texture)
	{
	struct r600_context rctx = (struct r600_context )ctx;
	unsigned layer, level;
	float depth = 1.0f;

	if (!texture->dirty_db)
	return;

	for (level = 0; level <= texture->resource.b.b.last_level; level++) {
	unsigned num_layers = u_num_layers(&texture->resource.b.b, level);

	for (layer = 0; layer < num_layers; layer++) {
	struct pipe_surface zsurf, cbsurf, surf_tmpl;

	surf_tmpl.format = texture->real_format;
	surf_tmpl.u.tex.level = level;
	surf_tmpl.u.tex.first_layer = layer;
	surf_tmpl.u.tex.last_layer = layer;
	surf_tmpl.usage = PIPE_BIND_DEPTH_STENCIL;

	zsurf = ctx->create_surface(ctx, &texture->resource.b.b, &surf_tmpl);

	surf_tmpl.format = texture->flushed_depth_texture->real_format;
	surf_tmpl.usage = PIPE_BIND_RENDER_TARGET;
	cbsurf = ctx->create_surface(ctx,
	(struct pipe_resource*)texture->flushed_depth_texture, &surf_tmpl);

	r600_blitter_begin(ctx, R600_DECOMPRESS);
	util_blitter_custom_depth_stencil(rctx->blitter, zsurf, cbsurf, ~0, rctx->custom_dsa_flush, depth);
	r600_blitter_end(ctx);

	pipe_surface_reference(&zsurf, NULL);
	pipe_surface_reference(&cbsurf, NULL);
	}
	}

	texture->dirty_db = FALSE;
	}

	void si_flush_depth_textures(struct r600_context *rctx)
	{
	unsigned int i;

	/* FIXME: This handles fragment shader textures only. */

	for (i = 0; i < rctx->ps_samplers.n_views; ++i) {
	struct si_pipe_sampler_view *view;
	struct r600_resource_texture *tex;

	view = rctx->ps_samplers.views[i];
	if (!view) continue;

	tex = (struct r600_resource_texture *)view->base.texture;
	if (!tex->depth)
	continue;

	if (tex->is_flushing_texture)
	continue;

	si_blit_uncompress_depth(&rctx->context, tex);
	}

	/* also check CB here */
	for (i = 0; i < rctx->framebuffer.nr_cbufs; i++) {
	struct r600_resource_texture *tex;
	tex = (struct r600_resource_texture *)rctx->framebuffer.cbufs[i]->texture;

	if (!tex->depth)
	continue;

	if (tex->is_flushing_texture)
	continue;

	si_blit_uncompress_depth(&rctx->context, tex);
	}
	}

	static void r600_clear(struct pipe_context *ctx, unsigned buffers,
	const union pipe_color_union *color,
	double depth, unsigned stencil)
	{
	struct r600_context rctx = (struct r600_context )ctx;
	struct pipe_framebuffer_state *fb = &rctx->framebuffer;

	r600_blitter_begin(ctx, R600_CLEAR);
	util_blitter_clear(rctx->blitter, fb->width, fb->height,
	fb->nr_cbufs, buffers, fb->nr_cbufs ? fb->cbufs[0]->format : PIPE_FORMAT_NONE,
	color, depth, stencil);
	r600_blitter_end(ctx);
	}

	static void r600_clear_render_target(struct pipe_context *ctx,
	struct pipe_surface *dst,
	const union pipe_color_union *color,
	unsigned dstx, unsigned dsty,
	unsigned width, unsigned height)
	{
	struct r600_context rctx = (struct r600_context )ctx;

	r600_blitter_begin(ctx, R600_CLEAR_SURFACE);
	util_blitter_clear_render_target(rctx->blitter, dst, color,
	dstx, dsty, width, height);
	r600_blitter_end(ctx);
	}

	static void r600_clear_depth_stencil(struct pipe_context *ctx,
	struct pipe_surface *dst,
	unsigned clear_flags,
	double depth,
	unsigned stencil,
	unsigned dstx, unsigned dsty,
	unsigned width, unsigned height)
	{
	struct r600_context rctx = (struct r600_context )ctx;

	r600_blitter_begin(ctx, R600_CLEAR_SURFACE);
	util_blitter_clear_depth_stencil(rctx->blitter, dst, clear_flags, depth, stencil,
	dstx, dsty, width, height);
	r600_blitter_end(ctx);
	}



	/* Copy a block of pixels from one surface to another using HW. */
	static void r600_hw_copy_region(struct pipe_context *ctx,
	struct pipe_resource *dst,
	unsigned dst_level,
	unsigned dstx, unsigned dsty, unsigned dstz,
	struct pipe_resource *src,
	unsigned src_level,
	const struct pipe_box *src_box)
	{
	struct r600_context rctx = (struct r600_context )ctx;

	r600_blitter_begin(ctx, R600_COPY);
	util_blitter_copy_texture(rctx->blitter, dst, dst_level, ~0, dstx, dsty, dstz,
	src, src_level, 0, src_box);
	r600_blitter_end(ctx);
	}

	struct texture_orig_info {
	unsigned format;
	unsigned width0;
	unsigned height0;
	unsigned npix_x;
	unsigned npix_y;
	unsigned npix0_x;
	unsigned npix0_y;
	};

	static void r600_compressed_to_blittable(struct pipe_resource *tex,
	unsigned level,
	struct texture_orig_info *orig)
	{
	struct r600_resource_texture rtex = (struct r600_resource_texture)tex;
	struct r600_screen rscreen = (struct r600_screen )tex->screen;
	unsigned pixsize = util_format_get_blocksize(rtex->real_format);
	int new_format;
	int new_height, new_width;

	orig->format = tex->format;
	orig->width0 = tex->width0;
	orig->height0 = tex->height0;
	orig->npix0_x = rtex->surface.level[0].npix_x;
	orig->npix0_y = rtex->surface.level[0].npix_y;
	orig->npix_x = rtex->surface.level[level].npix_x;
	orig->npix_y = rtex->surface.level[level].npix_y;

	if (pixsize == 8)
	new_format = PIPE_FORMAT_R16G16B16A16_UINT; /* 64-bit block */
	else
	new_format = PIPE_FORMAT_R32G32B32A32_UINT; /* 128-bit block */

	new_width = util_format_get_nblocksx(tex->format, orig->width0);
	new_height = util_format_get_nblocksy(tex->format, orig->height0);

	tex->width0 = new_width;
	tex->height0 = new_height;
	tex->format = new_format;
	rtex->surface.level[0].npix_x = util_format_get_nblocksx(orig->format, orig->npix0_x);
	rtex->surface.level[0].npix_y = util_format_get_nblocksy(orig->format, orig->npix0_y);
	rtex->surface.level[level].npix_x = util_format_get_nblocksx(orig->format, orig->npix_x);
	rtex->surface.level[level].npix_y = util_format_get_nblocksy(orig->format, orig->npix_y);
	}

	static void r600_reset_blittable_to_compressed(struct pipe_resource *tex,
	unsigned level,
	struct texture_orig_info *orig)
	{
	struct r600_resource_texture rtex = (struct r600_resource_texture)tex;
	struct r600_screen rscreen = (struct r600_screen )tex->screen;

	tex->format = orig->format;
	tex->width0 = orig->width0;
	tex->height0 = orig->height0;
	rtex->surface.level[0].npix_x = orig->npix0_x;
	rtex->surface.level[0].npix_y = orig->npix0_y;
	rtex->surface.level[level].npix_x = orig->npix_x;
	rtex->surface.level[level].npix_y = orig->npix_y;
	}

	static void r600_resource_copy_region(struct pipe_context *ctx,
	struct pipe_resource *dst,
	unsigned dst_level,
	unsigned dstx, unsigned dsty, unsigned dstz,
	struct pipe_resource *src,
	unsigned src_level,
	const struct pipe_box *src_box)
	{
	struct r600_resource_texture rsrc = (struct r600_resource_texture)src;
	struct texture_orig_info orig_info[2];
	struct pipe_box sbox;
	const struct pipe_box *psbox;
	boolean restore_orig[2];

	memset(orig_info, 0, sizeof(orig_info));

	/* Fallback for buffers. */
	if (dst->target == PIPE_BUFFER && src->target == PIPE_BUFFER) {
	util_resource_copy_region(ctx, dst, dst_level, dstx, dsty, dstz,
	src, src_level, src_box);
	return;
	}

	if (rsrc->depth && !rsrc->is_flushing_texture)
	r600_texture_depth_flush(ctx, src, FALSE);

	restore_orig[0] = restore_orig[1] = FALSE;

	if (util_format_is_compressed(src->format)) {
	r600_compressed_to_blittable(src, src_level, &orig_info[0]);
	restore_orig[0] = TRUE;
	sbox.x = util_format_get_nblocksx(orig_info[0].format, src_box->x);
	sbox.y = util_format_get_nblocksy(orig_info[0].format, src_box->y);
	sbox.z = src_box->z;
	sbox.width = util_format_get_nblocksx(orig_info[0].format, src_box->width);
	sbox.height = util_format_get_nblocksy(orig_info[0].format, src_box->height);
	sbox.depth = src_box->depth;
	psbox=&sbox;
	} else
	psbox=src_box;

	if (util_format_is_compressed(dst->format)) {
	r600_compressed_to_blittable(dst, dst_level, &orig_info[1]);
	restore_orig[1] = TRUE;
	/* translate the dst box as well */
	dstx = util_format_get_nblocksx(orig_info[1].format, dstx);
	dsty = util_format_get_nblocksy(orig_info[1].format, dsty);
	}

	r600_hw_copy_region(ctx, dst, dst_level, dstx, dsty, dstz,
	src, src_level, psbox);

	if (restore_orig[0])
	r600_reset_blittable_to_compressed(src, src_level, &orig_info[0]);

	if (restore_orig[1])
	r600_reset_blittable_to_compressed(dst, dst_level, &orig_info[1]);
	}

	void si_init_blit_functions(struct r600_context *rctx)
	{
	rctx->context.clear = r600_clear;
	rctx->context.clear_render_target = r600_clear_render_target;
	rctx->context.clear_depth_stencil = r600_clear_depth_stencil;
	rctx->context.resource_copy_region = r600_resource_copy_region;
	}

	void r600_blit_push_depth(struct pipe_context ctx, struct r600_resource_texture texture)
	{
	struct pipe_box sbox;

	sbox.x = sbox.y = sbox.z = 0;
	sbox.width = texture->resource.b.b.width0;
	sbox.height = texture->resource.b.b.height0;
	/* XXX that might be wrong */
	sbox.depth = 1;

	r600_hw_copy_region(ctx, (struct pipe_resource *)texture, 0,
	0, 0, 0,
	(struct pipe_resource *)texture->flushed_depth_texture, 0,
	&sbox);
	}