Merge branch 'pipe-video'

1 files changed, 604 insertions, 0 deletions

diff --git a/src/gallium/auxiliary/vl/vl_zscan.c b/src/gallium/auxiliary/vl/vl_zscan.c
new file mode 100644
index 00000000000..58cee0070d8
--- /dev/null
+++ b/src/gallium/auxiliary/vl/vl_zscan.c
@@ -0,0 +1,604 @@
+/**************************************************************************
+ *
+ * Copyright 2011 Christian König
+ * All Rights Reserved.
+ *
+ * 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, 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 TUNGSTEN GRAPHICS 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 <assert.h>
+
+#include <pipe/p_screen.h>
+#include <pipe/p_context.h>
+
+#include <util/u_draw.h>
+#include <util/u_sampler.h>
+#include <util/u_inlines.h>
+
+#include <tgsi/tgsi_ureg.h>
+
+#include <vl/vl_defines.h>
+#include <vl/vl_types.h>
+
+#include "vl_zscan.h"
+#include "vl_vertex_buffers.h"
+
+enum VS_OUTPUT
+{
+   VS_O_VPOS,
+   VS_O_VTEX
+};
+
+const int vl_zscan_linear[] =
+{
+   /* Linear scan pattern */
+    0, 1, 2, 3, 4, 5, 6, 7,
+    8, 9,10,11,12,13,14,15,
+   16,17,18,19,20,21,22,23,
+   24,25,26,27,28,29,30,31,
+   32,33,34,35,36,37,38,39,
+   40,41,42,43,44,45,46,47,
+   48,49,50,51,52,53,54,55,
+   56,57,58,59,60,61,62,63
+};
+
+const int vl_zscan_normal[] =
+{
+   /* Zig-Zag scan pattern */
+    0, 1, 8,16, 9, 2, 3,10,
+   17,24,32,25,18,11, 4, 5,
+   12,19,26,33,40,48,41,34,
+   27,20,13, 6, 7,14,21,28,
+   35,42,49,56,57,50,43,36,
+   29,22,15,23,30,37,44,51,
+   58,59,52,45,38,31,39,46,
+   53,60,61,54,47,55,62,63
+};
+
+const int vl_zscan_alternate[] =
+{
+   /* Alternate scan pattern */
+    0, 8,16,24, 1, 9, 2,10,
+   17,25,32,40,48,56,57,49,
+   41,33,26,18, 3,11, 4,12,
+   19,27,34,42,50,58,35,43,
+   51,59,20,28, 5,13, 6,14,
+   21,29,36,44,52,60,37,45,
+   53,61,22,30, 7,15,23,31,
+   38,46,54,62,39,47,55,63
+};
+
+static void *
+create_vert_shader(struct vl_zscan *zscan)
+{
+   struct ureg_program *shader;
+
+   struct ureg_src scale;
+   struct ureg_src vrect, vpos, block_num;
+
+   struct ureg_dst tmp;
+   struct ureg_dst o_vpos, o_vtex[zscan->num_channels];
+
+   signed i;
+
+   shader = ureg_create(TGSI_PROCESSOR_VERTEX);
+   if (!shader)
+      return NULL;
+
+   scale = ureg_imm2f(shader,
+      (float)BLOCK_WIDTH / zscan->buffer_width,
+      (float)BLOCK_HEIGHT / zscan->buffer_height);
+
+   vrect = ureg_DECL_vs_input(shader, VS_I_RECT);
+   vpos = ureg_DECL_vs_input(shader, VS_I_VPOS);
+   block_num = ureg_DECL_vs_input(shader, VS_I_BLOCK_NUM);
+
+   tmp = ureg_DECL_temporary(shader);
+
+   o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
+
+   for (i = 0; i < zscan->num_channels; ++i)
+      o_vtex[i] = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX + i);
+
+   /*
+    * o_vpos.xy = (vpos + vrect) * scale
+    * o_vpos.zw = 1.0f
+    *
+    * tmp.xy = InstanceID / blocks_per_line
+    * tmp.x = frac(tmp.x)
+    * tmp.y = floor(tmp.y)
+    *
+    * o_vtex.x = vrect.x / blocks_per_line + tmp.x
+    * o_vtex.y = vrect.y
+    * o_vtex.z = tmp.z * blocks_per_line / blocks_total
+    */
+   ureg_ADD(shader, ureg_writemask(tmp, TGSI_WRITEMASK_XY), vpos, vrect);
+   ureg_MUL(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_XY), ureg_src(tmp), scale);
+   ureg_MOV(shader, ureg_writemask(o_vpos, TGSI_WRITEMASK_ZW), ureg_imm1f(shader, 1.0f));
+
+   ureg_MUL(shader, ureg_writemask(tmp, TGSI_WRITEMASK_XW), ureg_scalar(block_num, TGSI_SWIZZLE_X),
+            ureg_imm1f(shader, 1.0f / zscan->blocks_per_line));
+
+   ureg_FRC(shader, ureg_writemask(tmp, TGSI_WRITEMASK_Y), ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_X));
+   ureg_FLR(shader, ureg_writemask(tmp, TGSI_WRITEMASK_W), ureg_src(tmp));
+
+   for (i = 0; i < zscan->num_channels; ++i) {
+      ureg_ADD(shader, ureg_writemask(tmp, TGSI_WRITEMASK_X), ureg_scalar(ureg_src(tmp), TGSI_SWIZZLE_Y),
+               ureg_imm1f(shader, 1.0f / (zscan->blocks_per_line * BLOCK_WIDTH) * (i - (signed)zscan->num_channels / 2)));
+
+      ureg_MAD(shader, ureg_writemask(o_vtex[i], TGSI_WRITEMASK_X), vrect,
+               ureg_imm1f(shader, 1.0f / zscan->blocks_per_line), ureg_src(tmp));
+      ureg_MOV(shader, ureg_writemask(o_vtex[i], TGSI_WRITEMASK_Y), vrect);
+      ureg_MOV(shader, ureg_writemask(o_vtex[i], TGSI_WRITEMASK_Z), vpos);
+      ureg_MUL(shader, ureg_writemask(o_vtex[i], TGSI_WRITEMASK_W), ureg_src(tmp),
+               ureg_imm1f(shader, (float)zscan->blocks_per_line / zscan->blocks_total));
+   }
+
+   ureg_release_temporary(shader, tmp);
+   ureg_END(shader);
+
+   return ureg_create_shader_and_destroy(shader, zscan->pipe);
+}
+
+static void *
+create_frag_shader(struct vl_zscan *zscan)
+{
+   struct ureg_program *shader;
+   struct ureg_src vtex[zscan->num_channels];
+
+   struct ureg_src samp_src, samp_scan, samp_quant;
+
+   struct ureg_dst tmp[zscan->num_channels];
+   struct ureg_dst quant, fragment;
+
+   unsigned i;
+
+   shader = ureg_create(TGSI_PROCESSOR_FRAGMENT);
+   if (!shader)
+      return NULL;
+
+   for (i = 0; i < zscan->num_channels; ++i)
+      vtex[i] = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX + i, TGSI_INTERPOLATE_LINEAR);
+
+   samp_src = ureg_DECL_sampler(shader, 0);
+   samp_scan = ureg_DECL_sampler(shader, 1);
+   samp_quant = ureg_DECL_sampler(shader, 2);
+
+   for (i = 0; i < zscan->num_channels; ++i)
+      tmp[i] = ureg_DECL_temporary(shader);
+   quant = ureg_DECL_temporary(shader);
+
+   fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
+
+   /*
+    * tmp.x = tex(vtex, 1)
+    * tmp.y = vtex.z
+    * fragment = tex(tmp, 0) * quant
+    */
+   for (i = 0; i < zscan->num_channels; ++i)
+      ureg_TEX(shader, ureg_writemask(tmp[i], TGSI_WRITEMASK_X), TGSI_TEXTURE_2D, vtex[i], samp_scan);
+
+   for (i = 0; i < zscan->num_channels; ++i)
+      ureg_MOV(shader, ureg_writemask(tmp[i], TGSI_WRITEMASK_Y), ureg_scalar(vtex[i], TGSI_SWIZZLE_W));
+
+   for (i = 0; i < zscan->num_channels; ++i) {
+      ureg_TEX(shader, ureg_writemask(tmp[0], TGSI_WRITEMASK_X << i), TGSI_TEXTURE_2D, ureg_src(tmp[i]), samp_src);
+      ureg_TEX(shader, ureg_writemask(quant, TGSI_WRITEMASK_X << i), TGSI_TEXTURE_3D, vtex[i], samp_quant);
+   }
+
+   ureg_MUL(shader, quant, ureg_src(quant), ureg_imm1f(shader, 16.0f));
+   ureg_MUL(shader, fragment, ureg_src(tmp[0]), ureg_src(quant));
+
+   for (i = 0; i < zscan->num_channels; ++i)
+      ureg_release_temporary(shader, tmp[i]);
+   ureg_END(shader);
+
+   return ureg_create_shader_and_destroy(shader, zscan->pipe);
+}
+
+static bool
+init_shaders(struct vl_zscan *zscan)
+{
+   assert(zscan);
+
+   zscan->vs = create_vert_shader(zscan);
+   if (!zscan->vs)
+      goto error_vs;
+
+   zscan->fs = create_frag_shader(zscan);
+   if (!zscan->fs)
+      goto error_fs;
+
+   return true;
+
+error_fs:
+   zscan->pipe->delete_vs_state(zscan->pipe, zscan->vs);
+
+error_vs:
+   return false;
+}
+
+static void
+cleanup_shaders(struct vl_zscan *zscan)
+{
+   assert(zscan);
+
+   zscan->pipe->delete_vs_state(zscan->pipe, zscan->vs);
+   zscan->pipe->delete_fs_state(zscan->pipe, zscan->fs);
+}
+
+static bool
+init_state(struct vl_zscan *zscan)
+{
+   struct pipe_blend_state blend;
+   struct pipe_rasterizer_state rs_state;
+   struct pipe_sampler_state sampler;
+   unsigned i;
+
+   assert(zscan);
+
+   memset(&rs_state, 0, sizeof(rs_state));
+   rs_state.gl_rasterization_rules = true;
+   zscan->rs_state = zscan->pipe->create_rasterizer_state(zscan->pipe, &rs_state);
+   if (!zscan->rs_state)
+      goto error_rs_state;
+
+   memset(&blend, 0, sizeof blend);
+
+   blend.independent_blend_enable = 0;
+   blend.rt[0].blend_enable = 0;
+   blend.rt[0].rgb_func = PIPE_BLEND_ADD;
+   blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
+   blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
+   blend.rt[0].alpha_func = PIPE_BLEND_ADD;
+   blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
+   blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
+   blend.logicop_enable = 0;
+   blend.logicop_func = PIPE_LOGICOP_CLEAR;
+   /* Needed to allow color writes to FB, even if blending disabled */
+   blend.rt[0].colormask = PIPE_MASK_RGBA;
+   blend.dither = 0;
+   zscan->blend = zscan->pipe->create_blend_state(zscan->pipe, &blend);
+   if (!zscan->blend)
+      goto error_blend;
+
+   for (i = 0; i < 3; ++i) {
+      memset(&sampler, 0, sizeof(sampler));
+      sampler.wrap_s = PIPE_TEX_WRAP_REPEAT;
+      sampler.wrap_t = PIPE_TEX_WRAP_REPEAT;
+      sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
+      sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
+      sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
+      sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
+      sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
+      sampler.compare_func = PIPE_FUNC_ALWAYS;
+      sampler.normalized_coords = 1;
+      zscan->samplers[i] = zscan->pipe->create_sampler_state(zscan->pipe, &sampler);
+      if (!zscan->samplers[i])
+         goto error_samplers;
+   }
+
+   return true;
+
+error_samplers:
+   for (i = 0; i < 2; ++i)
+      if (zscan->samplers[i])
+         zscan->pipe->delete_sampler_state(zscan->pipe, zscan->samplers[i]);
+
+   zscan->pipe->delete_rasterizer_state(zscan->pipe, zscan->rs_state);
+
+error_blend:
+   zscan->pipe->delete_blend_state(zscan->pipe, zscan->blend);
+
+error_rs_state:
+   return false;
+}
+
+static void
+cleanup_state(struct vl_zscan *zscan)
+{
+   unsigned i;
+
+   assert(zscan);
+
+   for (i = 0; i < 3; ++i)
+      zscan->pipe->delete_sampler_state(zscan->pipe, zscan->samplers[i]);
+
+   zscan->pipe->delete_rasterizer_state(zscan->pipe, zscan->rs_state);
+   zscan->pipe->delete_blend_state(zscan->pipe, zscan->blend);
+}
+
+struct pipe_sampler_view *
+vl_zscan_layout(struct pipe_context *pipe, const int layout[64], unsigned blocks_per_line)
+{
+   const unsigned total_size = blocks_per_line * BLOCK_WIDTH * BLOCK_HEIGHT;
+
+   int patched_layout[64];
+
+   struct pipe_resource res_tmpl, *res;
+   struct pipe_sampler_view sv_tmpl, *sv;
+   struct pipe_transfer *buf_transfer;
+   unsigned x, y, i, pitch;
+   float *f;
+
+   struct pipe_box rect =
+   {
+      0, 0, 0,
+      BLOCK_WIDTH * blocks_per_line,
+      BLOCK_HEIGHT,
+      1
+   };
+
+   assert(pipe && layout && blocks_per_line);
+
+   for (i = 0; i < 64; ++i)
+      patched_layout[layout[i]] = i;
+
+   memset(&res_tmpl, 0, sizeof(res_tmpl));
+   res_tmpl.target = PIPE_TEXTURE_2D;
+   res_tmpl.format = PIPE_FORMAT_R32_FLOAT;
+   res_tmpl.width0 = BLOCK_WIDTH * blocks_per_line;
+   res_tmpl.height0 = BLOCK_HEIGHT;
+   res_tmpl.depth0 = 1;
+   res_tmpl.array_size = 1;
+   res_tmpl.usage = PIPE_USAGE_IMMUTABLE;
+   res_tmpl.bind = PIPE_BIND_SAMPLER_VIEW;
+
+   res = pipe->screen->resource_create(pipe->screen, &res_tmpl);
+   if (!res)
+      goto error_resource;
+
+   buf_transfer = pipe->get_transfer
+   (
+      pipe, res,
+      0, PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD,
+      &rect
+   );
+   if (!buf_transfer)
+      goto error_transfer;
+
+   pitch = buf_transfer->stride / sizeof(float);
+
+   f = pipe->transfer_map(pipe, buf_transfer);
+   if (!f)
+      goto error_map;
+
+   for (i = 0; i < blocks_per_line; ++i)
+      for (y = 0; y < BLOCK_HEIGHT; ++y)
+         for (x = 0; x < BLOCK_WIDTH; ++x) {
+            float addr = patched_layout[x + y * BLOCK_WIDTH] +
+               i * BLOCK_WIDTH * BLOCK_HEIGHT;
+
+            addr /= total_size;
+
+            f[i * BLOCK_WIDTH + y * pitch + x] = addr;
+         }
+
+   pipe->transfer_unmap(pipe, buf_transfer);
+   pipe->transfer_destroy(pipe, buf_transfer);
+
+   memset(&sv_tmpl, 0, sizeof(sv_tmpl));
+   u_sampler_view_default_template(&sv_tmpl, res, res->format);
+   sv = pipe->create_sampler_view(pipe, res, &sv_tmpl);
+   pipe_resource_reference(&res, NULL);
+   if (!sv)
+      goto error_map;
+
+   return sv;
+
+error_map:
+   pipe->transfer_destroy(pipe, buf_transfer);
+
+error_transfer:
+   pipe_resource_reference(&res, NULL);
+
+error_resource:
+   return NULL;
+}
+
+bool
+vl_zscan_init(struct vl_zscan *zscan, struct pipe_context *pipe,
+              unsigned buffer_width, unsigned buffer_height,
+              unsigned blocks_per_line, unsigned blocks_total,
+              unsigned num_channels)
+{
+   assert(zscan && pipe);
+
+   zscan->pipe = pipe;
+   zscan->buffer_width = buffer_width;
+   zscan->buffer_height = buffer_height;
+   zscan->num_channels = num_channels;
+   zscan->blocks_per_line = blocks_per_line;
+   zscan->blocks_total = blocks_total;
+
+   if(!init_shaders(zscan))
+      return false;
+
+   if(!init_state(zscan)) {
+      cleanup_shaders(zscan);
+      return false;
+   }
+
+   return true;
+}
+
+void
+vl_zscan_cleanup(struct vl_zscan *zscan)
+{
+   assert(zscan);
+
+   cleanup_shaders(zscan);
+   cleanup_state(zscan);
+}
+
+bool
+vl_zscan_init_buffer(struct vl_zscan *zscan, struct vl_zscan_buffer *buffer,
+                     struct pipe_sampler_view *src, struct pipe_surface *dst)
+{
+   struct pipe_resource res_tmpl, *res;
+   struct pipe_sampler_view sv_tmpl;
+
+   assert(zscan && buffer);
+
+   memset(buffer, 0, sizeof(struct vl_zscan_buffer));
+
+   buffer->zscan = zscan;
+
+   pipe_sampler_view_reference(&buffer->src, src);
+
+   buffer->viewport.scale[0] = dst->width;
+   buffer->viewport.scale[1] = dst->height;
+   buffer->viewport.scale[2] = 1;
+   buffer->viewport.scale[3] = 1;
+   buffer->viewport.translate[0] = 0;
+   buffer->viewport.translate[1] = 0;
+   buffer->viewport.translate[2] = 0;
+   buffer->viewport.translate[3] = 0;
+
+   buffer->fb_state.width = dst->width;
+   buffer->fb_state.height = dst->height;
+   buffer->fb_state.nr_cbufs = 1;
+   pipe_surface_reference(&buffer->fb_state.cbufs[0], dst);
+
+   memset(&res_tmpl, 0, sizeof(res_tmpl));
+   res_tmpl.target = PIPE_TEXTURE_3D;
+   res_tmpl.format = PIPE_FORMAT_R8_UNORM;
+   res_tmpl.width0 = BLOCK_WIDTH * zscan->blocks_per_line;
+   res_tmpl.height0 = BLOCK_HEIGHT;
+   res_tmpl.depth0 = 2;
+   res_tmpl.array_size = 1;
+   res_tmpl.usage = PIPE_USAGE_IMMUTABLE;
+   res_tmpl.bind = PIPE_BIND_SAMPLER_VIEW;
+
+   res = zscan->pipe->screen->resource_create(zscan->pipe->screen, &res_tmpl);
+   if (!res)
+      return false;
+
+   memset(&sv_tmpl, 0, sizeof(sv_tmpl));
+   u_sampler_view_default_template(&sv_tmpl, res, res->format);
+   sv_tmpl.swizzle_r = sv_tmpl.swizzle_g = sv_tmpl.swizzle_b = sv_tmpl.swizzle_a = TGSI_SWIZZLE_X;
+   buffer->quant = zscan->pipe->create_sampler_view(zscan->pipe, res, &sv_tmpl);
+   pipe_resource_reference(&res, NULL);
+   if (!buffer->quant)
+      return false;
+
+   return true;
+}
+
+void
+vl_zscan_cleanup_buffer(struct vl_zscan_buffer *buffer)
+{
+   assert(buffer);
+
+   pipe_sampler_view_reference(&buffer->src, NULL);
+   pipe_sampler_view_reference(&buffer->layout, NULL);
+   pipe_sampler_view_reference(&buffer->quant, NULL);
+   pipe_surface_reference(&buffer->fb_state.cbufs[0], NULL);
+}
+
+void
+vl_zscan_set_layout(struct vl_zscan_buffer *buffer, struct pipe_sampler_view *layout)
+{
+   assert(buffer);
+   assert(layout);
+
+   pipe_sampler_view_reference(&buffer->layout, layout);
+}
+
+void
+vl_zscan_upload_quant(struct vl_zscan_buffer *buffer,
+                      const uint8_t intra_matrix[64],
+                      const uint8_t non_intra_matrix[64])
+{
+   struct pipe_context *pipe;
+   struct pipe_transfer *buf_transfer;
+   unsigned x, y, i, pitch;
+   uint8_t *intra, *non_intra;
+
+   struct pipe_box rect =
+   {
+      0, 0, 0,
+      BLOCK_WIDTH,
+      BLOCK_HEIGHT,
+      2
+   };
+
+   assert(buffer);
+   assert(intra_matrix);
+   assert(non_intra_matrix);
+
+   pipe = buffer->zscan->pipe;
+
+   rect.width *= buffer->zscan->blocks_per_line;
+
+   buf_transfer = pipe->get_transfer
+   (
+      pipe, buffer->quant->texture,
+      0, PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD,
+      &rect
+   );
+   if (!buf_transfer)
+      goto error_transfer;
+
+   pitch = buf_transfer->stride;
+
+   non_intra = pipe->transfer_map(pipe, buf_transfer);
+   if (!non_intra)
+      goto error_map;
+
+   intra = non_intra + BLOCK_HEIGHT * pitch;
+
+   for (i = 0; i < buffer->zscan->blocks_per_line; ++i)
+      for (y = 0; y < BLOCK_HEIGHT; ++y)
+         for (x = 0; x < BLOCK_WIDTH; ++x) {
+            intra[i * BLOCK_WIDTH + y * pitch + x] = intra_matrix[x + y * BLOCK_WIDTH];
+            non_intra[i * BLOCK_WIDTH + y * pitch + x] = non_intra_matrix[x + y * BLOCK_WIDTH];
+         }
+
+   pipe->transfer_unmap(pipe, buf_transfer);
+
+error_map:
+   pipe->transfer_destroy(pipe, buf_transfer);
+
+error_transfer:
+   return;
+}
+
+void
+vl_zscan_render(struct vl_zscan_buffer *buffer, unsigned num_instances)
+{
+   struct vl_zscan *zscan;
+
+   assert(buffer);
+
+   zscan = buffer->zscan;
+
+   zscan->pipe->bind_rasterizer_state(zscan->pipe, zscan->rs_state);
+   zscan->pipe->bind_blend_state(zscan->pipe, zscan->blend);
+   zscan->pipe->bind_fragment_sampler_states(zscan->pipe, 3, zscan->samplers);
+   zscan->pipe->set_framebuffer_state(zscan->pipe, &buffer->fb_state);
+   zscan->pipe->set_viewport_state(zscan->pipe, &buffer->viewport);
+   zscan->pipe->set_fragment_sampler_views(zscan->pipe, 3, &buffer->src);
+   zscan->pipe->bind_vs_state(zscan->pipe, zscan->vs);
+   zscan->pipe->bind_fs_state(zscan->pipe, zscan->fs);
+   util_draw_arrays_instanced(zscan->pipe, PIPE_PRIM_QUADS, 0, 4, 0, num_instances);
+}