src/gallium/drivers/freedreno/freedreno_draw.c - platform/external/mesa3d - Git at Google

 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */

 /*
  * Copyright (C) 2012 Rob Clark <robclark@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
  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS 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.
  *
  * Authors:
  *    Rob Clark <robclark@freedesktop.org>
  */

 #include "pipe/p_state.h"
 #include "util/u_string.h"
 #include "util/u_memory.h"
 #include "util/u_prim.h"
 #include "util/u_format.h"

 #include "freedreno_draw.h"
 #include "freedreno_context.h"
 #include "freedreno_state.h"
 #include "freedreno_resource.h"
 #include "freedreno_query_hw.h"
 #include "freedreno_util.h"

 static void
 resource_read(struct fd_batch *batch, struct pipe_resource *prsc)
 {
 	if (!prsc)
 		return;
 	fd_batch_resource_used(batch, fd_resource(prsc), false);
 }

 static void
 resource_written(struct fd_batch *batch, struct pipe_resource *prsc)
 {
 	if (!prsc)
 		return;
 	fd_batch_resource_used(batch, fd_resource(prsc), true);
 }

 static void
 fd_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)
 {
 	struct fd_context *ctx = fd_context(pctx);
 	struct fd_batch *batch = ctx->batch;
 	struct pipe_framebuffer_state *pfb = &batch->framebuffer;
 	struct pipe_scissor_state *scissor = fd_context_get_scissor(ctx);
 	unsigned i, prims, buffers = 0;

 	/* if we supported transform feedback, we'd have to disable this: */
 	if (((scissor->maxx - scissor->minx) *
 			(scissor->maxy - scissor->miny)) == 0) {
 		return;
 	}

 	/* TODO: push down the region versions into the tiles */
 	if (!fd_render_condition_check(pctx))
 		return;

 	/* emulate unsupported primitives: */
 	if (!fd_supported_prim(ctx, info->mode)) {
 		if (ctx->streamout.num_targets > 0)
 			debug_error("stream-out with emulated prims");
 		util_primconvert_save_index_buffer(ctx->primconvert, &ctx->indexbuf);
 		util_primconvert_save_rasterizer_state(ctx->primconvert, ctx->rasterizer);
 		util_primconvert_draw_vbo(ctx->primconvert, info);
 		return;
 	}

 	if (ctx->in_blit) {
 		fd_batch_reset(batch);
 		ctx->dirty = ~0;
 	}

 	batch->blit = ctx->in_blit;
 	batch->back_blit = ctx->in_shadow;

 	/* NOTE: needs to be before resource_written(batch->query_buf), otherwise
 	 * query_buf may not be created yet.
 	 */
 	fd_hw_query_set_stage(batch, batch->draw, FD_STAGE_DRAW);

 	/*
 	 * Figure out the buffers/features we need:
 	 */

 	pipe_mutex_lock(ctx->screen->lock);

 	if (fd_depth_enabled(ctx)) {
 		buffers |= FD_BUFFER_DEPTH;
 		resource_written(batch, pfb->zsbuf->texture);
 		batch->gmem_reason |= FD_GMEM_DEPTH_ENABLED;
 	}

 	if (fd_stencil_enabled(ctx)) {
 		buffers |= FD_BUFFER_STENCIL;
 		resource_written(batch, pfb->zsbuf->texture);
 		batch->gmem_reason |= FD_GMEM_STENCIL_ENABLED;
 	}

 	if (fd_logicop_enabled(ctx))
 		batch->gmem_reason |= FD_GMEM_LOGICOP_ENABLED;

 	for (i = 0; i < pfb->nr_cbufs; i++) {
 		struct pipe_resource *surf;

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

 		surf = pfb->cbufs[i]->texture;

 		resource_written(batch, surf);
 		buffers |= PIPE_CLEAR_COLOR0 << i;

 		if (surf->nr_samples > 1)
 			batch->gmem_reason |= FD_GMEM_MSAA_ENABLED;

 		if (fd_blend_enabled(ctx, i))
 			batch->gmem_reason |= FD_GMEM_BLEND_ENABLED;
 	}

 	foreach_bit(i, ctx->constbuf[PIPE_SHADER_VERTEX].enabled_mask)
 		resource_read(batch, ctx->constbuf[PIPE_SHADER_VERTEX].cb[i].buffer);
 	foreach_bit(i, ctx->constbuf[PIPE_SHADER_FRAGMENT].enabled_mask)
 		resource_read(batch, ctx->constbuf[PIPE_SHADER_FRAGMENT].cb[i].buffer);

 	/* Mark VBOs as being read */
 	foreach_bit(i, ctx->vtx.vertexbuf.enabled_mask) {
 		assert(!ctx->vtx.vertexbuf.vb[i].user_buffer);
 		resource_read(batch, ctx->vtx.vertexbuf.vb[i].buffer);
 	}

 	/* Mark index buffer as being read */
 	resource_read(batch, ctx->indexbuf.buffer);

 	/* Mark textures as being read */
 	foreach_bit(i, ctx->verttex.valid_textures)
 		resource_read(batch, ctx->verttex.textures[i]->texture);
 	foreach_bit(i, ctx->fragtex.valid_textures)
 		resource_read(batch, ctx->fragtex.textures[i]->texture);

 	/* Mark streamout buffers as being written.. */
 	for (i = 0; i < ctx->streamout.num_targets; i++)
 		if (ctx->streamout.targets[i])
 			resource_written(batch, ctx->streamout.targets[i]->buffer);

 	resource_written(batch, batch->query_buf);

 	pipe_mutex_unlock(ctx->screen->lock);

 	batch->num_draws++;

 	prims = u_reduced_prims_for_vertices(info->mode, info->count);

 	ctx->stats.draw_calls++;

 	/* TODO prims_emitted should be clipped when the stream-out buffer is
 	 * not large enough.  See max_tf_vtx().. probably need to move that
 	 * into common code.  Although a bit more annoying since a2xx doesn't
 	 * use ir3 so no common way to get at the pipe_stream_output_info
 	 * which is needed for this calculation.
 	 */
 	if (ctx->streamout.num_targets > 0)
 		ctx->stats.prims_emitted += prims;
 	ctx->stats.prims_generated += prims;

 	/* any buffers that haven't been cleared yet, we need to restore: */
 	batch->restore |= buffers & (FD_BUFFER_ALL & ~batch->cleared);
 	/* and any buffers used, need to be resolved: */
 	batch->resolve |= buffers;

 	DBG("%p: %x %ux%u num_draws=%u (%s/%s)", batch, buffers,
 		pfb->width, pfb->height, batch->num_draws,
 		util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
 		util_format_short_name(pipe_surface_format(pfb->zsbuf)));

 	if (ctx->draw_vbo(ctx, info))
 		batch->needs_flush = true;

 	for (i = 0; i < ctx->streamout.num_targets; i++)
 		ctx->streamout.offsets[i] += info->count;

 	if (fd_mesa_debug & FD_DBG_DDRAW)
 		ctx->dirty = 0xffffffff;

 	fd_batch_check_size(batch);
 }

 /* Generic clear implementation (partially) using u_blitter: */
 static void
 fd_blitter_clear(struct pipe_context *pctx, unsigned buffers,
 		const union pipe_color_union *color, double depth, unsigned stencil)
 {
 	struct fd_context *ctx = fd_context(pctx);
 	struct pipe_framebuffer_state *pfb = &ctx->batch->framebuffer;
 	struct blitter_context *blitter = ctx->blitter;

 	fd_blitter_pipe_begin(ctx, false, true, FD_STAGE_CLEAR);

 	util_blitter_common_clear_setup(blitter, pfb->width, pfb->height,
 			buffers, NULL, NULL);

 	struct pipe_stencil_ref sr = {
 		.ref_value = { stencil & 0xff }
 	};
 	pctx->set_stencil_ref(pctx, &sr);

 	struct pipe_constant_buffer cb = {
 		.buffer_size = 16,
 		.user_buffer = &color->ui,
 	};
 	pctx->set_constant_buffer(pctx, PIPE_SHADER_FRAGMENT, 0, &cb);

 	if (!ctx->clear_rs_state) {
 		const struct pipe_rasterizer_state tmpl = {
 			.cull_face = PIPE_FACE_NONE,
 			.half_pixel_center = 1,
 			.bottom_edge_rule = 1,
 			.flatshade = 1,
 			.depth_clip = 1,
 		};
 		ctx->clear_rs_state = pctx->create_rasterizer_state(pctx, &tmpl);
 	}
 	pctx->bind_rasterizer_state(pctx, ctx->clear_rs_state);

 	struct pipe_viewport_state vp = {
 		.scale     = { 0.5f * pfb->width, -0.5f * pfb->height, depth },
 		.translate = { 0.5f * pfb->width,  0.5f * pfb->height, 0.0f },
 	};
 	pctx->set_viewport_states(pctx, 0, 1, &vp);

 	pctx->bind_vertex_elements_state(pctx, ctx->solid_vbuf_state.vtx);
 	pctx->set_vertex_buffers(pctx, blitter->vb_slot, 1,
 			&ctx->solid_vbuf_state.vertexbuf.vb[0]);
 	pctx->set_stream_output_targets(pctx, 0, NULL, NULL);
 	pctx->bind_vs_state(pctx, ctx->solid_prog.vp);
 	pctx->bind_fs_state(pctx, ctx->solid_prog.fp);

 	struct pipe_draw_info info = {
 		.mode = PIPE_PRIM_MAX,    /* maps to DI_PT_RECTLIST */
 		.count = 2,
 		.max_index = 1,
 		.instance_count = 1,
 	};
 	ctx->draw_vbo(ctx, &info);

 	util_blitter_restore_constant_buffer_state(blitter);
 	util_blitter_restore_vertex_states(blitter);
 	util_blitter_restore_fragment_states(blitter);
 	util_blitter_restore_render_cond(blitter);
 	util_blitter_unset_running_flag(blitter);

 	fd_blitter_pipe_end(ctx);
 }

 /* TODO figure out how to make better use of existing state mechanism
  * for clear (and possibly gmem->mem / mem->gmem) so we can (a) keep
  * track of what state really actually changes, and (b) reduce the code
  * in the a2xx/a3xx parts.
  */

 static void
 fd_clear(struct pipe_context *pctx, unsigned buffers,
 		const union pipe_color_union *color, double depth, unsigned stencil)
 {
 	struct fd_context *ctx = fd_context(pctx);
 	struct fd_batch *batch = ctx->batch;
 	struct pipe_framebuffer_state *pfb = &batch->framebuffer;
 	struct pipe_scissor_state *scissor = fd_context_get_scissor(ctx);
 	unsigned cleared_buffers;
 	int i;

 	/* TODO: push down the region versions into the tiles */
 	if (!fd_render_condition_check(pctx))
 		return;

 	if (ctx->in_blit) {
 		fd_batch_reset(batch);
 		ctx->dirty = ~0;
 	}

 	/* for bookkeeping about which buffers have been cleared (and thus
 	 * can fully or partially skip mem2gmem) we need to ignore buffers
 	 * that have already had a draw, in case apps do silly things like
 	 * clear after draw (ie. if you only clear the color buffer, but
 	 * something like alpha-test causes side effects from the draw in
 	 * the depth buffer, etc)
 	 */
 	cleared_buffers = buffers & (FD_BUFFER_ALL & ~batch->restore);

 	/* do we have full-screen scissor? */
 	if (!memcmp(scissor, &ctx->disabled_scissor, sizeof(*scissor))) {
 		batch->cleared |= cleared_buffers;
 	} else {
 		batch->partial_cleared |= cleared_buffers;
 		if (cleared_buffers & PIPE_CLEAR_COLOR)
 			batch->cleared_scissor.color = *scissor;
 		if (cleared_buffers & PIPE_CLEAR_DEPTH)
 			batch->cleared_scissor.depth = *scissor;
 		if (cleared_buffers & PIPE_CLEAR_STENCIL)
 			batch->cleared_scissor.stencil = *scissor;
 	}
 	batch->resolve |= buffers;
 	batch->needs_flush = true;

 	pipe_mutex_lock(ctx->screen->lock);

 	if (buffers & PIPE_CLEAR_COLOR)
 		for (i = 0; i < pfb->nr_cbufs; i++)
 			if (buffers & (PIPE_CLEAR_COLOR0 << i))
 				resource_written(batch, pfb->cbufs[i]->texture);

 	if (buffers & (PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL)) {
 		resource_written(batch, pfb->zsbuf->texture);
 		batch->gmem_reason |= FD_GMEM_CLEARS_DEPTH_STENCIL;
 	}

 	resource_written(batch, batch->query_buf);

 	pipe_mutex_unlock(ctx->screen->lock);

 	DBG("%p: %x %ux%u depth=%f, stencil=%u (%s/%s)", batch, buffers,
 		pfb->width, pfb->height, depth, stencil,
 		util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
 		util_format_short_name(pipe_surface_format(pfb->zsbuf)));

 	/* if per-gen backend doesn't implement ctx->clear() generic
 	 * blitter clear:
 	 */
 	if (!ctx->clear) {
 		fd_blitter_clear(pctx, buffers, color, depth, stencil);
 		return;
 	}

 	fd_hw_query_set_stage(batch, batch->draw, FD_STAGE_CLEAR);

 	ctx->clear(ctx, buffers, color, depth, stencil);

 	ctx->dirty |= FD_DIRTY_ZSA |
 			FD_DIRTY_VIEWPORT |
 			FD_DIRTY_RASTERIZER |
 			FD_DIRTY_SAMPLE_MASK |
 			FD_DIRTY_PROG |
 			FD_DIRTY_CONSTBUF |
 			FD_DIRTY_BLEND |
 			FD_DIRTY_FRAMEBUFFER;

 	if (fd_mesa_debug & FD_DBG_DCLEAR)
 		ctx->dirty = 0xffffffff;
 }

 static void
 fd_clear_render_target(struct pipe_context *pctx, struct pipe_surface *ps,
 		const union pipe_color_union *color,
 		unsigned x, unsigned y, unsigned w, unsigned h,
 		bool render_condition_enabled)
 {
 	DBG("TODO: x=%u, y=%u, w=%u, h=%u", x, y, w, h);
 }

 static void
 fd_clear_depth_stencil(struct pipe_context *pctx, struct pipe_surface *ps,
 		unsigned buffers, double depth, unsigned stencil,
 		unsigned x, unsigned y, unsigned w, unsigned h,
 		bool render_condition_enabled)
 {
 	DBG("TODO: buffers=%u, depth=%f, stencil=%u, x=%u, y=%u, w=%u, h=%u",
 			buffers, depth, stencil, x, y, w, h);
 }

 void
 fd_draw_init(struct pipe_context *pctx)
 {
 	pctx->draw_vbo = fd_draw_vbo;
 	pctx->clear = fd_clear;
 	pctx->clear_render_target = fd_clear_render_target;
 	pctx->clear_depth_stencil = fd_clear_depth_stencil;
 }
	/* -- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -- */

	/*
	* Copyright (C) 2012 Rob Clark <robclark@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
	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	* 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 NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS 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.
	*
	* Authors:
	* Rob Clark <robclark@freedesktop.org>
	*/

	#include "pipe/p_state.h"
	#include "util/u_string.h"
	#include "util/u_memory.h"
	#include "util/u_prim.h"
	#include "util/u_format.h"

	#include "freedreno_draw.h"
	#include "freedreno_context.h"
	#include "freedreno_state.h"
	#include "freedreno_resource.h"
	#include "freedreno_query_hw.h"
	#include "freedreno_util.h"

	static void
	resource_read(struct fd_batch batch, struct pipe_resource prsc)
	{
	if (!prsc)
	return;
	fd_batch_resource_used(batch, fd_resource(prsc), false);
	}

	static void
	resource_written(struct fd_batch batch, struct pipe_resource prsc)
	{
	if (!prsc)
	return;
	fd_batch_resource_used(batch, fd_resource(prsc), true);
	}

	static void
	fd_draw_vbo(struct pipe_context pctx, const struct pipe_draw_info info)
	{
	struct fd_context *ctx = fd_context(pctx);
	struct fd_batch *batch = ctx->batch;
	struct pipe_framebuffer_state *pfb = &batch->framebuffer;
	struct pipe_scissor_state *scissor = fd_context_get_scissor(ctx);
	unsigned i, prims, buffers = 0;

	/* if we supported transform feedback, we'd have to disable this: */
	if (((scissor->maxx - scissor->minx) *
	(scissor->maxy - scissor->miny)) == 0) {
	return;
	}

	/* TODO: push down the region versions into the tiles */
	if (!fd_render_condition_check(pctx))
	return;

	/* emulate unsupported primitives: */
	if (!fd_supported_prim(ctx, info->mode)) {
	if (ctx->streamout.num_targets > 0)
	debug_error("stream-out with emulated prims");
	util_primconvert_save_index_buffer(ctx->primconvert, &ctx->indexbuf);
	util_primconvert_save_rasterizer_state(ctx->primconvert, ctx->rasterizer);
	util_primconvert_draw_vbo(ctx->primconvert, info);
	return;
	}

	if (ctx->in_blit) {
	fd_batch_reset(batch);
	ctx->dirty = ~0;
	}

	batch->blit = ctx->in_blit;
	batch->back_blit = ctx->in_shadow;

	/* NOTE: needs to be before resource_written(batch->query_buf), otherwise
	* query_buf may not be created yet.
	*/
	fd_hw_query_set_stage(batch, batch->draw, FD_STAGE_DRAW);

	/*
	* Figure out the buffers/features we need:
	*/

	pipe_mutex_lock(ctx->screen->lock);

	if (fd_depth_enabled(ctx)) {
	buffers \|= FD_BUFFER_DEPTH;
	resource_written(batch, pfb->zsbuf->texture);
	batch->gmem_reason \|= FD_GMEM_DEPTH_ENABLED;
	}

	if (fd_stencil_enabled(ctx)) {
	buffers \|= FD_BUFFER_STENCIL;
	resource_written(batch, pfb->zsbuf->texture);
	batch->gmem_reason \|= FD_GMEM_STENCIL_ENABLED;
	}

	if (fd_logicop_enabled(ctx))
	batch->gmem_reason \|= FD_GMEM_LOGICOP_ENABLED;

	for (i = 0; i < pfb->nr_cbufs; i++) {
	struct pipe_resource *surf;

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

	surf = pfb->cbufs[i]->texture;

	resource_written(batch, surf);
	buffers \|= PIPE_CLEAR_COLOR0 << i;

	if (surf->nr_samples > 1)
	batch->gmem_reason \|= FD_GMEM_MSAA_ENABLED;

	if (fd_blend_enabled(ctx, i))
	batch->gmem_reason \|= FD_GMEM_BLEND_ENABLED;
	}

	foreach_bit(i, ctx->constbuf[PIPE_SHADER_VERTEX].enabled_mask)
	resource_read(batch, ctx->constbuf[PIPE_SHADER_VERTEX].cb[i].buffer);
	foreach_bit(i, ctx->constbuf[PIPE_SHADER_FRAGMENT].enabled_mask)
	resource_read(batch, ctx->constbuf[PIPE_SHADER_FRAGMENT].cb[i].buffer);

	/* Mark VBOs as being read */
	foreach_bit(i, ctx->vtx.vertexbuf.enabled_mask) {
	assert(!ctx->vtx.vertexbuf.vb[i].user_buffer);
	resource_read(batch, ctx->vtx.vertexbuf.vb[i].buffer);
	}

	/* Mark index buffer as being read */
	resource_read(batch, ctx->indexbuf.buffer);

	/* Mark textures as being read */
	foreach_bit(i, ctx->verttex.valid_textures)
	resource_read(batch, ctx->verttex.textures[i]->texture);
	foreach_bit(i, ctx->fragtex.valid_textures)
	resource_read(batch, ctx->fragtex.textures[i]->texture);

	/* Mark streamout buffers as being written.. */
	for (i = 0; i < ctx->streamout.num_targets; i++)
	if (ctx->streamout.targets[i])
	resource_written(batch, ctx->streamout.targets[i]->buffer);

	resource_written(batch, batch->query_buf);

	pipe_mutex_unlock(ctx->screen->lock);

	batch->num_draws++;

	prims = u_reduced_prims_for_vertices(info->mode, info->count);

	ctx->stats.draw_calls++;

	/* TODO prims_emitted should be clipped when the stream-out buffer is
	* not large enough. See max_tf_vtx().. probably need to move that
	* into common code. Although a bit more annoying since a2xx doesn't
	* use ir3 so no common way to get at the pipe_stream_output_info
	* which is needed for this calculation.
	*/
	if (ctx->streamout.num_targets > 0)
	ctx->stats.prims_emitted += prims;
	ctx->stats.prims_generated += prims;

	/* any buffers that haven't been cleared yet, we need to restore: */
	batch->restore \|= buffers & (FD_BUFFER_ALL & ~batch->cleared);
	/* and any buffers used, need to be resolved: */
	batch->resolve \|= buffers;

	DBG("%p: %x %ux%u num_draws=%u (%s/%s)", batch, buffers,
	pfb->width, pfb->height, batch->num_draws,
	util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
	util_format_short_name(pipe_surface_format(pfb->zsbuf)));

	if (ctx->draw_vbo(ctx, info))
	batch->needs_flush = true;

	for (i = 0; i < ctx->streamout.num_targets; i++)
	ctx->streamout.offsets[i] += info->count;

	if (fd_mesa_debug & FD_DBG_DDRAW)
	ctx->dirty = 0xffffffff;

	fd_batch_check_size(batch);
	}

	/* Generic clear implementation (partially) using u_blitter: */
	static void
	fd_blitter_clear(struct pipe_context *pctx, unsigned buffers,
	const union pipe_color_union *color, double depth, unsigned stencil)
	{
	struct fd_context *ctx = fd_context(pctx);
	struct pipe_framebuffer_state *pfb = &ctx->batch->framebuffer;
	struct blitter_context *blitter = ctx->blitter;

	fd_blitter_pipe_begin(ctx, false, true, FD_STAGE_CLEAR);

	util_blitter_common_clear_setup(blitter, pfb->width, pfb->height,
	buffers, NULL, NULL);

	struct pipe_stencil_ref sr = {
	.ref_value = { stencil & 0xff }
	};
	pctx->set_stencil_ref(pctx, &sr);

	struct pipe_constant_buffer cb = {
	.buffer_size = 16,
	.user_buffer = &color->ui,
	};
	pctx->set_constant_buffer(pctx, PIPE_SHADER_FRAGMENT, 0, &cb);

	if (!ctx->clear_rs_state) {
	const struct pipe_rasterizer_state tmpl = {
	.cull_face = PIPE_FACE_NONE,
	.half_pixel_center = 1,
	.bottom_edge_rule = 1,
	.flatshade = 1,
	.depth_clip = 1,
	};
	ctx->clear_rs_state = pctx->create_rasterizer_state(pctx, &tmpl);
	}
	pctx->bind_rasterizer_state(pctx, ctx->clear_rs_state);

	struct pipe_viewport_state vp = {
	.scale = { 0.5f * pfb->width, -0.5f * pfb->height, depth },
	.translate = { 0.5f * pfb->width, 0.5f * pfb->height, 0.0f },
	};
	pctx->set_viewport_states(pctx, 0, 1, &vp);

	pctx->bind_vertex_elements_state(pctx, ctx->solid_vbuf_state.vtx);
	pctx->set_vertex_buffers(pctx, blitter->vb_slot, 1,
	&ctx->solid_vbuf_state.vertexbuf.vb[0]);
	pctx->set_stream_output_targets(pctx, 0, NULL, NULL);
	pctx->bind_vs_state(pctx, ctx->solid_prog.vp);
	pctx->bind_fs_state(pctx, ctx->solid_prog.fp);

	struct pipe_draw_info info = {
	.mode = PIPE_PRIM_MAX, /* maps to DI_PT_RECTLIST */
	.count = 2,
	.max_index = 1,
	.instance_count = 1,
	};
	ctx->draw_vbo(ctx, &info);

	util_blitter_restore_constant_buffer_state(blitter);
	util_blitter_restore_vertex_states(blitter);
	util_blitter_restore_fragment_states(blitter);
	util_blitter_restore_render_cond(blitter);
	util_blitter_unset_running_flag(blitter);

	fd_blitter_pipe_end(ctx);
	}

	/* TODO figure out how to make better use of existing state mechanism
	* for clear (and possibly gmem->mem / mem->gmem) so we can (a) keep
	* track of what state really actually changes, and (b) reduce the code
	* in the a2xx/a3xx parts.
	*/

	static void
	fd_clear(struct pipe_context *pctx, unsigned buffers,
	const union pipe_color_union *color, double depth, unsigned stencil)
	{
	struct fd_context *ctx = fd_context(pctx);
	struct fd_batch *batch = ctx->batch;
	struct pipe_framebuffer_state *pfb = &batch->framebuffer;
	struct pipe_scissor_state *scissor = fd_context_get_scissor(ctx);
	unsigned cleared_buffers;
	int i;

	/* TODO: push down the region versions into the tiles */
	if (!fd_render_condition_check(pctx))
	return;

	if (ctx->in_blit) {
	fd_batch_reset(batch);
	ctx->dirty = ~0;
	}

	/* for bookkeeping about which buffers have been cleared (and thus
	* can fully or partially skip mem2gmem) we need to ignore buffers
	* that have already had a draw, in case apps do silly things like
	* clear after draw (ie. if you only clear the color buffer, but
	* something like alpha-test causes side effects from the draw in
	* the depth buffer, etc)
	*/
	cleared_buffers = buffers & (FD_BUFFER_ALL & ~batch->restore);

	/* do we have full-screen scissor? */
	if (!memcmp(scissor, &ctx->disabled_scissor, sizeof(*scissor))) {
	batch->cleared \|= cleared_buffers;
	} else {
	batch->partial_cleared \|= cleared_buffers;
	if (cleared_buffers & PIPE_CLEAR_COLOR)
	batch->cleared_scissor.color = *scissor;
	if (cleared_buffers & PIPE_CLEAR_DEPTH)
	batch->cleared_scissor.depth = *scissor;
	if (cleared_buffers & PIPE_CLEAR_STENCIL)
	batch->cleared_scissor.stencil = *scissor;
	}
	batch->resolve \|= buffers;
	batch->needs_flush = true;

	pipe_mutex_lock(ctx->screen->lock);

	if (buffers & PIPE_CLEAR_COLOR)
	for (i = 0; i < pfb->nr_cbufs; i++)
	if (buffers & (PIPE_CLEAR_COLOR0 << i))
	resource_written(batch, pfb->cbufs[i]->texture);

	if (buffers & (PIPE_CLEAR_DEPTH \| PIPE_CLEAR_STENCIL)) {
	resource_written(batch, pfb->zsbuf->texture);
	batch->gmem_reason \|= FD_GMEM_CLEARS_DEPTH_STENCIL;
	}

	resource_written(batch, batch->query_buf);

	pipe_mutex_unlock(ctx->screen->lock);

	DBG("%p: %x %ux%u depth=%f, stencil=%u (%s/%s)", batch, buffers,
	pfb->width, pfb->height, depth, stencil,
	util_format_short_name(pipe_surface_format(pfb->cbufs[0])),
	util_format_short_name(pipe_surface_format(pfb->zsbuf)));

	/* if per-gen backend doesn't implement ctx->clear() generic
	* blitter clear:
	*/
	if (!ctx->clear) {
	fd_blitter_clear(pctx, buffers, color, depth, stencil);
	return;
	}

	fd_hw_query_set_stage(batch, batch->draw, FD_STAGE_CLEAR);

	ctx->clear(ctx, buffers, color, depth, stencil);

	ctx->dirty \|= FD_DIRTY_ZSA \|
	FD_DIRTY_VIEWPORT \|
	FD_DIRTY_RASTERIZER \|
	FD_DIRTY_SAMPLE_MASK \|
	FD_DIRTY_PROG \|
	FD_DIRTY_CONSTBUF \|
	FD_DIRTY_BLEND \|
	FD_DIRTY_FRAMEBUFFER;

	if (fd_mesa_debug & FD_DBG_DCLEAR)
	ctx->dirty = 0xffffffff;
	}

	static void
	fd_clear_render_target(struct pipe_context pctx, struct pipe_surface ps,
	const union pipe_color_union *color,
	unsigned x, unsigned y, unsigned w, unsigned h,
	bool render_condition_enabled)
	{
	DBG("TODO: x=%u, y=%u, w=%u, h=%u", x, y, w, h);
	}

	static void
	fd_clear_depth_stencil(struct pipe_context pctx, struct pipe_surface ps,
	unsigned buffers, double depth, unsigned stencil,
	unsigned x, unsigned y, unsigned w, unsigned h,
	bool render_condition_enabled)
	{
	DBG("TODO: buffers=%u, depth=%f, stencil=%u, x=%u, y=%u, w=%u, h=%u",
	buffers, depth, stencil, x, y, w, h);
	}

	void
	fd_draw_init(struct pipe_context *pctx)
	{
	pctx->draw_vbo = fd_draw_vbo;
	pctx->clear = fd_clear;
	pctx->clear_render_target = fd_clear_render_target;
	pctx->clear_depth_stencil = fd_clear_depth_stencil;
	}