C++ r600_blitter_begin函数代码示例

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,
			   buffers, 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_copy_first_sample(struct pipe_context *ctx,
				   const struct pipe_resolve_info *info)
{
	struct r600_context *rctx = (struct r600_context *)ctx;
	struct r600_texture *rsrc = (struct r600_texture*)info->src.res;
	struct pipe_surface *dst_view, dst_templ;
	struct pipe_sampler_view src_templ, *src_view;
	struct pipe_box box;

	if (rsrc->is_depth && !rsrc->is_flushing_texture) {
		if (!r600_init_flushed_depth_texture(ctx, info->src.res, NULL))
			return; /* error */

		/* Decompress the first sample only. */
		r600_blit_decompress_depth(ctx,	rsrc, NULL,
					   0, 0,
					   info->src.layer, info->src.layer,
					   0, 0);
	}
	if (rctx->chip_class != CAYMAN && rsrc->fmask_size && rsrc->cmask_size) {
		r600_blit_decompress_color(ctx, rsrc,
					   0, 0,
					   info->src.layer, info->src.layer);
	}

	/* this is correct for upside-down blits too */
	u_box_2d(info->src.x0,
		 info->src.y0,
		 info->src.x1 - info->src.x0,
		 info->src.y1 - info->src.y0, &box);

	/* Initialize the surface. */
	util_blitter_default_dst_texture(&dst_templ, info->dst.res,
					 info->dst.level, info->dst.layer, &box);
	dst_view = ctx->create_surface(ctx, info->dst.res, &dst_templ);

	/* Initialize the sampler view. */
	util_blitter_default_src_texture(&src_templ, info->src.res, 0);
	src_view = ctx->create_sampler_view(ctx, info->src.res, &src_templ);

	/* Copy the first sample into dst. */
	r600_blitter_begin(ctx, R600_COPY_TEXTURE);
	util_blitter_copy_texture_view(rctx->blitter, dst_view, ~0, info->dst.x0,
				       info->dst.y0, src_view, 0, &box,
				       info->src.res->width0, info->src.res->height0,
				       info->mask);
	r600_blitter_end(ctx);

	pipe_surface_reference(&dst_view, NULL);
	pipe_sampler_view_reference(&src_view, NULL);
}

static void r600_blit_decompress_depth_in_place(struct r600_context *rctx,
                                                struct r600_texture *texture,
                                                unsigned first_level, unsigned last_level,
                                                unsigned first_layer, unsigned last_layer)
{
	struct pipe_surface *zsurf, surf_tmpl = {{0}};
	unsigned layer, max_layer, checked_last_layer, level;

	/* Enable decompression in DB_RENDER_CONTROL */
	rctx->db_misc_state.flush_depthstencil_in_place = true;
	rctx->db_misc_state.atom.dirty = true;

	surf_tmpl.format = texture->resource.b.b.format;

	for (level = first_level; level <= last_level; level++) {
		if (!(texture->dirty_level_mask & (1 << level)))
			continue;

		surf_tmpl.u.tex.level = level;

		/* The smaller the mipmap level, the less layers there are
		 * as far as 3D textures are concerned. */
		max_layer = util_max_layer(&texture->resource.b.b, level);
		checked_last_layer = last_layer < max_layer ? last_layer : max_layer;

		for (layer = first_layer; layer <= checked_last_layer; layer++) {
			surf_tmpl.u.tex.first_layer = layer;
			surf_tmpl.u.tex.last_layer = layer;

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

			r600_blitter_begin(&rctx->b.b, R600_DECOMPRESS);
			util_blitter_custom_depth_stencil(rctx->blitter, zsurf, NULL, ~0,
							  rctx->custom_dsa_flush, 1.0f);
			r600_blitter_end(&rctx->b.b);

			pipe_surface_reference(&zsurf, NULL);
		}

		/* The texture will always be dirty if some layers or samples aren't flushed.
		 * I don't think this case occurs often though. */
		if (first_layer == 0 && last_layer == max_layer) {
			texture->dirty_level_mask &= ~(1 << level);
		}
	}

	/* Disable decompression in DB_RENDER_CONTROL */
	rctx->db_misc_state.flush_depthstencil_in_place = false;
	rctx->db_misc_state.atom.dirty = true;
}

/* 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);
}

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);
}

static bool do_hardware_msaa_resolve(struct pipe_context *ctx,
				     const struct pipe_blit_info *info)
{
	struct r600_context *rctx = (struct r600_context*)ctx;
	struct r600_texture *dst = (struct r600_texture*)info->dst.resource;
	unsigned dst_width = u_minify(info->dst.resource->width0, info->dst.level);
	unsigned dst_height = u_minify(info->dst.resource->height0, info->dst.level);
	enum pipe_format format = int_to_norm_format(info->dst.format);
	unsigned sample_mask =
		rctx->b.chip_class == CAYMAN ? ~0 :
		((1ull << MAX2(1, info->src.resource->nr_samples)) - 1);

	if (info->src.resource->nr_samples > 1 &&
	    info->dst.resource->nr_samples <= 1 &&
	    util_max_layer(info->src.resource, 0) == 0 &&
	    util_max_layer(info->dst.resource, info->dst.level) == 0 &&
	    info->dst.format == info->src.format &&
	    !util_format_is_pure_integer(format) &&
	    !util_format_is_depth_or_stencil(format) &&
	    !info->scissor_enable &&
	    (info->mask & PIPE_MASK_RGBA) == PIPE_MASK_RGBA &&
	    dst_width == info->src.resource->width0 &&
	    dst_height == info->src.resource->height0 &&
	    info->dst.box.x == 0 &&
	    info->dst.box.y == 0 &&
	    info->dst.box.width == dst_width &&
	    info->dst.box.height == dst_height &&
	    info->dst.box.depth == 1 &&
	    info->src.box.x == 0 &&
	    info->src.box.y == 0 &&
	    info->src.box.width == dst_width &&
	    info->src.box.height == dst_height &&
	    info->src.box.depth == 1 &&
	    dst->surface.level[info->dst.level].mode >= RADEON_SURF_MODE_1D &&
	    (!dst->cmask.size || !dst->dirty_level_mask) /* dst cannot be fast-cleared */) {
		r600_blitter_begin(ctx, R600_COLOR_RESOLVE |
				   (info->render_condition_enable ? 0 : R600_DISABLE_RENDER_COND));
		util_blitter_custom_resolve_color(rctx->blitter,
						  info->dst.resource, info->dst.level,
						  info->dst.box.z,
						  info->src.resource, info->src.box.z,
						  sample_mask, rctx->custom_blend_resolve,
						  format);
		r600_blitter_end(ctx);
		return true;
	}
	return false;
}

void r600_copy_buffer(struct pipe_context *ctx, struct
                      pipe_resource *dst, unsigned dstx,
                      struct pipe_resource *src, const struct pipe_box *src_box)
{
    struct r600_context *rctx = (struct r600_context*)ctx;

    if (rctx->screen->has_streamout &&
            /* Require dword alignment. */
            dstx % 4 == 0 && src_box->x % 4 == 0 && src_box->width % 4 == 0) {
        r600_blitter_begin(ctx, R600_COPY_BUFFER);
        util_blitter_copy_buffer(rctx->blitter, dst, dstx, src, src_box->x, src_box->width);
        r600_blitter_end(ctx);
    } else {
        util_resource_copy_region(ctx, dst, 0, dstx, 0, 0, src, 0, src_box);
    }
}

static void r600_blit_decompress_color(struct pipe_context *ctx,
		struct r600_texture *rtex,
		unsigned first_level, unsigned last_level,
		unsigned first_layer, unsigned last_layer)
{
	struct r600_context *rctx = (struct r600_context *)ctx;
	unsigned layer, level, checked_last_layer, max_layer;

	assert(rctx->chip_class != CAYMAN);

	if (!rtex->dirty_level_mask)
		return;

	for (level = first_level; level <= last_level; level++) {
		if (!(rtex->dirty_level_mask & (1 << level)))
			continue;

		/* The smaller the mipmap level, the less layers there are
		 * as far as 3D textures are concerned. */
		max_layer = u_max_layer(&rtex->resource.b.b, level);
		checked_last_layer = last_layer < max_layer ? last_layer : max_layer;

		for (layer = first_layer; layer <= checked_last_layer; layer++) {
			struct pipe_surface *cbsurf, surf_tmpl;

			surf_tmpl.format = rtex->resource.b.b.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_RENDER_TARGET;
			cbsurf = ctx->create_surface(ctx, &rtex->resource.b.b, &surf_tmpl);

			r600_blitter_begin(ctx, R600_DECOMPRESS);
			util_blitter_custom_color(rctx->blitter, cbsurf,
						  rctx->custom_blend_decompress);
			r600_blitter_end(ctx);

			pipe_surface_reference(&cbsurf, NULL);
		}

		/* The texture will always be dirty if some layers or samples aren't flushed.
		 * I don't think this case occurs often though. */
		if (first_layer == 0 && last_layer == max_layer) {
			rtex->dirty_level_mask &= ~(1 << level);
		}
	}
}

void r600_blit_uncompress_depth(struct pipe_context *ctx, struct r600_resource_texture *texture)
{
	struct r600_pipe_context *rctx = (struct r600_pipe_context *)ctx;
	unsigned layer, level;
	float depth = 1.0f;

	if (!texture->dirty_db)
		return;

	if (rctx->family == CHIP_RV610 || rctx->family == CHIP_RV630 ||
	    rctx->family == CHIP_RV620 || rctx->family == CHIP_RV635)
		depth = 0.0f;

	for (level = 0; level <= texture->resource.b.b.b.last_level; level++) {
		unsigned num_layers = u_num_layers(&texture->resource.b.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.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, rctx->custom_dsa_flush, depth);
			r600_blitter_end(ctx);

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

	texture->dirty_db = FALSE;
}

static void r600_blit(struct pipe_context *ctx,
                      const struct pipe_blit_info *info)
{
	struct r600_context *rctx = (struct r600_context*)ctx;

	if (do_hardware_msaa_resolve(ctx, info)) {
		return;
	}

	assert(util_blitter_is_blit_supported(rctx->blitter, info));

	/* The driver doesn't decompress resources automatically while
	 * u_blitter is rendering. */
	if (!r600_decompress_subresource(ctx, info->src.resource, info->src.level,
					 info->src.box.z,
					 info->src.box.z + info->src.box.depth - 1)) {
		return; /* error */
	}

	r600_blitter_begin(ctx, R600_BLIT);
	util_blitter_blit(rctx->blitter, info);
	r600_blitter_end(ctx);
}

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_context *rctx = (struct r600_context *)ctx;
	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 = src_box;
	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;
	}

	/* This must be done before entering u_blitter to avoid recursion. */
	if (rsrc->is_depth && !rsrc->is_flushing_texture) {
		si_blit_decompress_depth_in_place(rctx, rsrc,
						  src_level, src_level,
						  src_box->z, src_box->z + src_box->depth - 1);
	}

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

	if (util_format_is_compressed(src->format) &&
	    util_format_is_compressed(dst->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;

		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);
	} else if (!util_blitter_is_copy_supported(rctx->blitter, dst, src,
						   PIPE_MASK_RGBAZS)) {
		unsigned blocksize = util_format_get_blocksize(src->format);

		switch (blocksize) {
		case 1:
			r600_change_format(src, src_level, &orig_info[0],
					   PIPE_FORMAT_R8_UNORM);
			r600_change_format(dst, dst_level, &orig_info[1],
					   PIPE_FORMAT_R8_UNORM);
			break;
		case 4:
			r600_change_format(src, src_level, &orig_info[0],
					   PIPE_FORMAT_R8G8B8A8_UNORM);
			r600_change_format(dst, dst_level, &orig_info[1],
					   PIPE_FORMAT_R8G8B8A8_UNORM);
			break;
		default:
			fprintf(stderr, "Unhandled format %s with blocksize %u\n",
				util_format_short_name(src->format), blocksize);
			assert(0);
		}
		restore_orig[0] = TRUE;
		restore_orig[1] = TRUE;
	}

	r600_blitter_begin(ctx, R600_COPY);
	util_blitter_copy_texture(rctx->blitter, dst, dst_level, dstx, dsty, dstz,
				  src, src_level, psbox, PIPE_MASK_RGBAZS, TRUE);
	r600_blitter_end(ctx);

	if (restore_orig[0])
		r600_reset_blittable_to_orig(src, src_level, &orig_info[0]);

	if (restore_orig[1])
		r600_reset_blittable_to_orig(dst, dst_level, &orig_info[1]);
}

void si_blit_uncompress_depth(struct pipe_context *ctx,
		struct r600_resource_texture *texture,
		struct r600_resource_texture *staging,
		unsigned first_level, unsigned last_level,
		unsigned first_layer, unsigned last_layer)
{
	struct r600_context *rctx = (struct r600_context *)ctx;
	unsigned layer, level, checked_last_layer, max_layer;
	float depth = 1.0f;
	const struct util_format_description *desc;
	void *custom_dsa;
	struct r600_resource_texture *flushed_depth_texture = staging ?
			staging : texture->flushed_depth_texture;

	if (!staging && !texture->dirty_db_mask)
		return;

	desc = util_format_description(flushed_depth_texture->resource.b.b.format);
	switch (util_format_has_depth(desc) | util_format_has_stencil(desc) << 1) {
	default:
		assert(!"No depth or stencil to uncompress");
	case 3:
		custom_dsa = rctx->custom_dsa_flush_depth_stencil;
		break;
	case 2:
		custom_dsa = rctx->custom_dsa_flush_stencil;
		break;
	case 1:
		custom_dsa = rctx->custom_dsa_flush_depth;
		break;
	}

	for (level = first_level; level <= last_level; level++) {
		if (!staging && !(texture->dirty_db_mask & (1 << level)))
			continue;

		/* The smaller the mipmap level, the less layers there are
		 * as far as 3D textures are concerned. */
		max_layer = u_max_layer(&texture->resource.b.b, level);
		checked_last_layer = last_layer < max_layer ? last_layer : max_layer;

		for (layer = first_layer; layer <= checked_last_layer; 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;

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

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

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

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

		/* The texture will always be dirty if some layers aren't flushed.
		 * I don't think this case can occur though. */
		if (!staging && first_layer == 0 && last_layer == max_layer) {
			texture->dirty_db_mask &= ~(1 << level);
		}
	}
}

//.........这里部分代码省略.........
	if (util_format_is_compressed(src->format)) {
		unsigned blocksize = util_format_get_blocksize(src->format);

		if (blocksize == 8)
			src_templ.format = PIPE_FORMAT_R16G16B16A16_UINT; /* 64-bit block */
		else
			src_templ.format = PIPE_FORMAT_R32G32B32A32_UINT; /* 128-bit block */
		dst_templ.format = src_templ.format;

		dst_width = util_format_get_nblocksx(dst->format, dst_width);
		dst_height = util_format_get_nblocksy(dst->format, dst_height);
		src_width0 = util_format_get_nblocksx(src->format, src_width0);
		src_height0 = util_format_get_nblocksy(src->format, src_height0);
		src_widthFL = util_format_get_nblocksx(src->format, src_widthFL);
		src_heightFL = util_format_get_nblocksy(src->format, src_heightFL);

		dstx = util_format_get_nblocksx(dst->format, dstx);
		dsty = util_format_get_nblocksy(dst->format, dsty);

		sbox.x = util_format_get_nblocksx(src->format, src_box->x);
		sbox.y = util_format_get_nblocksy(src->format, src_box->y);
		sbox.z = src_box->z;
		sbox.width = util_format_get_nblocksx(src->format, src_box->width);
		sbox.height = util_format_get_nblocksy(src->format, src_box->height);
		sbox.depth = src_box->depth;
		src_box = &sbox;

		src_force_level = src_level;
	} else if (!util_blitter_is_copy_supported(rctx->blitter, dst, src)) {
		if (util_format_is_subsampled_422(src->format)) {

			src_templ.format = PIPE_FORMAT_R8G8B8A8_UINT;
			dst_templ.format = PIPE_FORMAT_R8G8B8A8_UINT;

			dst_width = util_format_get_nblocksx(dst->format, dst_width);
			src_width0 = util_format_get_nblocksx(src->format, src_width0);
			src_widthFL = util_format_get_nblocksx(src->format, src_widthFL);

			dstx = util_format_get_nblocksx(dst->format, dstx);

			sbox = *src_box;
			sbox.x = util_format_get_nblocksx(src->format, src_box->x);
			sbox.width = util_format_get_nblocksx(src->format, src_box->width);
			src_box = &sbox;
		} else {
			unsigned blocksize = util_format_get_blocksize(src->format);

			switch (blocksize) {
			case 1:
				dst_templ.format = PIPE_FORMAT_R8_UNORM;
				src_templ.format = PIPE_FORMAT_R8_UNORM;
				break;
                        case 2:
				dst_templ.format = PIPE_FORMAT_R8G8_UNORM;
				src_templ.format = PIPE_FORMAT_R8G8_UNORM;
				break;
			case 4:
				dst_templ.format = PIPE_FORMAT_R8G8B8A8_UNORM;
				src_templ.format = PIPE_FORMAT_R8G8B8A8_UNORM;
				break;
                        case 8:
                                dst_templ.format = PIPE_FORMAT_R16G16B16A16_UINT;
                                src_templ.format = PIPE_FORMAT_R16G16B16A16_UINT;
                                break;
                        case 16:
                                dst_templ.format = PIPE_FORMAT_R32G32B32A32_UINT;
                                src_templ.format = PIPE_FORMAT_R32G32B32A32_UINT;
                                break;
			default:
				fprintf(stderr, "Unhandled format %s with blocksize %u\n",
					util_format_short_name(src->format), blocksize);
				assert(0);
			}
		}
	}

	dst_view = r600_create_surface_custom(ctx, dst, &dst_templ, dst_width, dst_height);

	if (rctx->b.chip_class >= EVERGREEN) {
		src_view = evergreen_create_sampler_view_custom(ctx, src, &src_templ,
								src_width0, src_height0,
								src_force_level);
	} else {
		src_view = r600_create_sampler_view_custom(ctx, src, &src_templ,
							   src_widthFL, src_heightFL);
	}

        u_box_3d(dstx, dsty, dstz, abs(src_box->width), abs(src_box->height),
                 abs(src_box->depth), &dstbox);

	/* Copy. */
	r600_blitter_begin(ctx, R600_COPY_TEXTURE);
	util_blitter_blit_generic(rctx->blitter, dst_view, &dstbox,
				  src_view, src_box, src_width0, src_height0,
				  PIPE_MASK_RGBAZS, PIPE_TEX_FILTER_NEAREST, NULL);
	r600_blitter_end(ctx);

	pipe_surface_reference(&dst_view, NULL);
	pipe_sampler_view_reference(&src_view, NULL);
}

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.state;

	if (buffers & PIPE_CLEAR_COLOR && rctx->b.chip_class >= EVERGREEN) {
		evergreen_do_fast_color_clear(&rctx->b, fb, &rctx->framebuffer.atom,
					      &buffers, color);
	}

	if (buffers & PIPE_CLEAR_COLOR) {
		int i;

		/* These buffers cannot use fast clear, make sure to disable expansion. */
		for (i = 0; i < fb->nr_cbufs; i++) {
			struct r600_texture *tex;

			/* If not clearing this buffer, skip. */
			if (!(buffers & (PIPE_CLEAR_COLOR0 << i)))
				continue;

			if (!fb->cbufs[i])
				continue;

			tex = (struct r600_texture *)fb->cbufs[i]->texture;
			if (tex->fmask.size == 0)
				tex->dirty_level_mask &= ~(1 << fb->cbufs[i]->u.tex.level);
		}
	}

	/* if hyperz enabled just clear hyperz */
	if (fb->zsbuf && (buffers & PIPE_CLEAR_DEPTH)) {
		struct r600_texture *rtex;
		unsigned level = fb->zsbuf->u.tex.level;

		rtex = (struct r600_texture*)fb->zsbuf->texture;

		/* We can't use hyperz fast clear if each slice of a texture
		 * array are clear to different value. To simplify code just
		 * disable fast clear for texture array.
		 */
		/* Only use htile for first level */
		if (rtex->htile_buffer && !level &&
		    util_max_layer(&rtex->resource.b.b, level) == 0) {
			if (rtex->depth_clear_value != depth) {
				rtex->depth_clear_value = depth;
				rctx->db_state.atom.dirty = true;
			}
			rctx->db_misc_state.htile_clear = true;
			rctx->db_misc_state.atom.dirty = true;
		}
	}

	r600_blitter_begin(ctx, R600_CLEAR);
	util_blitter_clear(rctx->blitter, fb->width, fb->height,
			   util_framebuffer_get_num_layers(fb),
			   buffers, color, depth, stencil);
	r600_blitter_end(ctx);

	/* disable fast clear */
	if (rctx->db_misc_state.htile_clear) {
		rctx->db_misc_state.htile_clear = false;
		rctx->db_misc_state.atom.dirty = true;
	}
}