<div dir="ltr">Hi Christian<br><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Aug 3, 2016 at 6:16 PM, Christian König <span dir="ltr"><<a href="mailto:christian.koenig@amd.com" target="_blank">christian.koenig@amd.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Sorry for the delay I've been on vacation for a week.<br>
<br></blockquote><div>Good to hear back from you !!</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Where you able to fix the problem Andy reported? I was able to rather easily reproduce that.<br>
<br></blockquote><div>I have tested it on my system and my friend's system and it seems to be working fine. It would be great</div><div>if Andy can confirm the same. </div><div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Leave out level 8&9 is clearly a good idea and I'm rather eager to commit this set now if it doesn't show any more obvious problems.<br>
<br></blockquote><div>Me too :)</div><div><br></div><div>Regards,</div><div>Nayan.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Regards,<br>
Christian.<div class="HOEnZb"><div class="h5"><br>
<br>
Am 01.08.2016 um 12:56 schrieb Nayan Deshmukh:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
v2: avoid dividing by zero when calculating lanczos<br>
<br>
Signed-off-by: Nayan Deshmukh <<a href="mailto:nayan26deshmukh@gmail.com" target="_blank">nayan26deshmukh@gmail.com</a>><br>
---<br>
  src/gallium/auxiliary/Makefile.sources       |   2 +<br>
  src/gallium/auxiliary/vl/vl_lanczos_filter.c | 445 +++++++++++++++++++++++++++<br>
  src/gallium/auxiliary/vl/vl_lanczos_filter.h |  63 ++++<br>
  3 files changed, 510 insertions(+)<br>
  create mode 100644 src/gallium/auxiliary/vl/vl_lanczos_filter.c<br>
  create mode 100644 src/gallium/auxiliary/vl/vl_lanczos_filter.h<br>
<br>
diff --git a/src/gallium/auxiliary/Makefile.sources b/src/gallium/auxiliary/Makefile.sources<br>
index e0311bf..4eb0f65 100644<br>
--- a/src/gallium/auxiliary/Makefile.sources<br>
+++ b/src/gallium/auxiliary/Makefile.sources<br>
@@ -330,6 +330,8 @@ VL_SOURCES := \<br>
        vl/vl_deint_filter.h \<br>
        vl/vl_idct.c \<br>
        vl/vl_idct.h \<br>
+       vl/vl_lanczos_filter.c \<br>
+       vl/vl_lanczos_filter.h \<br>
        vl/vl_matrix_filter.c \<br>
        vl/vl_matrix_filter.h \<br>
        vl/vl_mc.c \<br>
diff --git a/src/gallium/auxiliary/vl/vl_lanczos_filter.c b/src/gallium/auxiliary/vl/vl_lanczos_filter.c<br>
new file mode 100644<br>
index 0000000..0601b90<br>
--- /dev/null<br>
+++ b/src/gallium/auxiliary/vl/vl_lanczos_filter.c<br>
@@ -0,0 +1,445 @@<br>
+/**************************************************************************<br>
+ *<br>
+ * Copyright 2016 Nayan Deshmukh.<br>
+ * All Rights Reserved.<br>
+ *<br>
+ * Permission is hereby granted, free of charge, to any person obtaining a<br>
+ * copy of this software and associated documentation files (the<br>
+ * "Software"), to deal in the Software without restriction, including<br>
+ * without limitation the rights to use, copy, modify, merge, publish,<br>
+ * distribute, sub license, and/or sell copies of the Software, and to<br>
+ * permit persons to whom the Software is furnished to do so, subject to<br>
+ * the following conditions:<br>
+ *<br>
+ * The above copyright notice and this permission notice (including the<br>
+ * next paragraph) shall be included in all copies or substantial portions<br>
+ * of the Software.<br>
+ *<br>
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS<br>
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF<br>
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.<br>
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR<br>
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,<br>
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE<br>
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.<br>
+ *<br>
+ **************************************************************************/<br>
+<br>
+#include <stdio.h><br>
+<br>
+#include "pipe/p_context.h"<br>
+<br>
+#include "tgsi/tgsi_ureg.h"<br>
+<br>
+#include "util/u_draw.h"<br>
+#include "util/u_memory.h"<br>
+#include "util/u_math.h"<br>
+#include "util/u_rect.h"<br>
+<br>
+#include "vl_types.h"<br>
+#include "vl_vertex_buffers.h"<br>
+#include "vl_lanczos_filter.h"<br>
+<br>
+enum VS_OUTPUT<br>
+{<br>
+   VS_O_VPOS = 0,<br>
+   VS_O_VTEX = 0<br>
+};<br>
+<br>
+static void *<br>
+create_vert_shader(struct vl_lanczos_filter *filter)<br>
+{<br>
+   struct ureg_program *shader;<br>
+   struct ureg_src i_vpos;<br>
+   struct ureg_dst o_vpos, o_vtex;<br>
+<br>
+   shader = ureg_create(PIPE_SHADER_VERTEX);<br>
+   if (!shader)<br>
+      return NULL;<br>
+<br>
+   i_vpos = ureg_DECL_vs_input(shader, 0);<br>
+   o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);<br>
+   o_vtex = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX);<br>
+<br>
+   ureg_MOV(shader, o_vpos, i_vpos);<br>
+   ureg_MOV(shader, o_vtex, i_vpos);<br>
+<br>
+   ureg_END(shader);<br>
+<br>
+   return ureg_create_shader_and_destroy(shader, filter->pipe);<br>
+}<br>
+<br>
+static void<br>
+create_frag_shader_lanczos(struct ureg_program *shader, struct ureg_src a,<br>
+                           struct ureg_src x, struct ureg_dst o_fragment)<br>
+{<br>
+   struct ureg_dst temp[8];<br>
+   unsigned i;<br>
+<br>
+   for(i = 0; i < 8; ++i)<br>
+       temp[i] = ureg_DECL_temporary(shader);<br>
+<br>
+   /*<br>
+    * temp[0] = (x == 0) ? 1.0f : x<br>
+    * temp[7] = (sin(pi * x) * sin ((pi * x)/a)) / x^2<br>
+    * o_fragment = (x == 0) ? 1.0f : temp[7]<br>
+    */<br>
+   ureg_MOV(shader, temp[0], x);<br>
+   ureg_SEQ(shader, temp[1], x, ureg_imm1f(shader, 0.0f));<br>
+<br>
+   ureg_LRP(shader, temp[0], ureg_src(temp[1]),<br>
+            ureg_imm1f(shader, 1.0f), ureg_src(temp[0]));<br>
+<br>
+   ureg_MUL(shader, temp[2], x,<br>
+            ureg_imm1f(shader, 3.141592));<br>
+   ureg_DIV(shader, temp[3], ureg_src(temp[2]), a);<br>
+<br>
+   ureg_SIN(shader, temp[4], ureg_src(temp[2]));<br>
+   ureg_SIN(shader, temp[5], ureg_src(temp[3]));<br>
+<br>
+   ureg_MUL(shader, temp[6], ureg_src(temp[4]),<br>
+            ureg_src(temp[5]));<br>
+   ureg_MUL(shader, temp[7], ureg_imm1f(shader,<br>
+            0.101321), a);<br>
+   ureg_MUL(shader, temp[7], ureg_src(temp[7]),<br>
+            ureg_src(temp[6]));<br>
+   ureg_DIV(shader, temp[7], ureg_src(temp[7]),<br>
+            ureg_src(temp[0]));<br>
+   ureg_DIV(shader, o_fragment,<br>
+           ureg_src(temp[7]), ureg_src(temp[0]));<br>
+<br>
+   ureg_LRP(shader, o_fragment, ureg_src(temp[1]),<br>
+            ureg_imm1f(shader, 1.0f), ureg_src(o_fragment));<br>
+<br>
+   for(i = 0; i < 8; ++i)<br>
+       ureg_release_temporary(shader, temp[i]);<br>
+}<br>
+<br>
+static void *<br>
+create_frag_shader(struct vl_lanczos_filter *filter, unsigned num_offsets,<br>
+                   struct vertex2f *offsets, unsigned a,<br>
+                   unsigned video_width, unsigned video_height)<br>
+{<br>
+   struct pipe_screen *screen = filter->pipe->screen;<br>
+   struct ureg_program *shader;<br>
+   struct ureg_src i_vtex, vtex;<br>
+   struct ureg_src sampler;<br>
+   struct ureg_src half_pixel;<br>
+   struct ureg_dst o_fragment;<br>
+   struct ureg_dst *t_array = MALLOC(sizeof(struct ureg_dst) * (num_offsets + 2));<br>
+   struct ureg_dst x, t_sum;<br>
+   unsigned i;<br>
+   bool first;<br>
+<br>
+   if (screen->get_shader_param(<br>
+      screen, PIPE_SHADER_FRAGMENT, PIPE_SHADER_CAP_MAX_TEMPS) < num_offsets + 2) {<br>
+      return NULL;<br>
+   }<br>
+<br>
+   shader = ureg_create(PIPE_SHADER_FRAGMENT);<br>
+   if (!shader) {<br>
+      return NULL;<br>
+   }<br>
+<br>
+   i_vtex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);<br>
+   sampler = ureg_DECL_sampler(shader, 0);<br>
+<br>
+   for (i = 0; i < num_offsets + 2; ++i)<br>
+      t_array[i] = ureg_DECL_temporary(shader);<br>
+   x = ureg_DECL_temporary(shader);<br>
+<br>
+   half_pixel = ureg_DECL_constant(shader, 0);<br>
+   o_fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);<br>
+<br>
+   /*<br>
+    * temp = (i_vtex * i_size)<br>
+    * x = frac(temp)<br>
+    * vtex = floor(i_vtex)/i_size - half_pixel<br>
+    */<br>
+   ureg_MUL(shader, ureg_writemask(t_array[0], TGSI_WRITEMASK_XY),<br>
+            i_vtex, ureg_imm2f(shader, video_width, video_height));<br>
+   ureg_FRC(shader, ureg_writemask(x, TGSI_WRITEMASK_XY),<br>
+            ureg_src(t_array[0]));<br>
+<br>
+   ureg_FLR(shader, ureg_writemask(t_array[1], TGSI_WRITEMASK_XY),<br>
+            ureg_src(t_array[0]));<br>
+   ureg_DIV(shader, ureg_writemask(t_array[1], TGSI_WRITEMASK_XY),<br>
+            ureg_src(t_array[1]), ureg_imm2f(shader, video_width, video_height));<br>
+   ureg_SUB(shader, ureg_writemask(t_array[1], TGSI_WRITEMASK_XY),<br>
+            ureg_src(t_array[1]), half_pixel);<br>
+   /*<br>
+    * t_array[2..*] = vtex + offset[0..*]<br>
+    * t_array[2..*] = tex(t_array[0..*], sampler)<br>
+    * o_fragment = sum(t_array[i] * lanczos(x - offsets[i].x) * lanczos(y - offsets[i].y))<br>
+    */<br>
+   vtex = ureg_src(t_array[1]);<br>
+   for (i = 0; i < num_offsets; ++i) {<br>
+        ureg_ADD(shader, ureg_writemask(t_array[i + 2], TGSI_WRITEMASK_XY),<br>
+                  vtex, ureg_imm2f(shader, offsets[i].x, offsets[i].y));<br>
+        ureg_MOV(shader, ureg_writemask(t_array[i + 2], TGSI_WRITEMASK_ZW),<br>
+                  ureg_imm1f(shader, 0.0f));<br>
+   }<br>
+<br>
+   for (i = 0; i < num_offsets; ++i) {<br>
+      ureg_TEX(shader, t_array[i + 2], TGSI_TEXTURE_2D, ureg_src(t_array[i + 2]), sampler);<br>
+   }<br>
+<br>
+   for(i = 0, first = true; i < num_offsets; ++i) {<br>
+      if (first) {<br>
+         t_sum = t_array[i + 2];<br>
+         ureg_SUB(shader, ureg_writemask(t_array[i], TGSI_WRITEMASK_XY),<br>
+                  ureg_src(x), ureg_imm2f(shader, offsets[i].x * video_width,<br>
+                  offsets[i].y * video_height));<br>
+         create_frag_shader_lanczos(shader, ureg_imm1f(shader, (float)(a)),<br>
+                 ureg_scalar(ureg_src(t_array[i]), TGSI_SWIZZLE_X), t_array[i + 1]);<br>
+         create_frag_shader_lanczos(shader, ureg_imm1f(shader, (float)(a)),<br>
+                 ureg_scalar(ureg_src(t_array[i]), TGSI_SWIZZLE_Y), t_array[i]);<br>
+         ureg_MUL(shader, t_array[i + 1], ureg_src(t_array[i + 1]),<br>
+                  ureg_src(t_array[i]));<br>
+         ureg_MUL(shader, t_sum, ureg_src(t_array[i + 2]),<br>
+                  ureg_src(t_array[i + 1]));<br>
+         first = false;<br>
+      } else {<br>
+         ureg_SUB(shader, ureg_writemask(t_array[i], TGSI_WRITEMASK_XY),<br>
+                  ureg_src(x), ureg_imm2f(shader, offsets[i].x * video_width,<br>
+                  offsets[i].y * video_height));<br>
+         create_frag_shader_lanczos(shader, ureg_imm1f(shader, (float)(a)),<br>
+                 ureg_scalar(ureg_src(t_array[i]), TGSI_SWIZZLE_X), t_array[i + 1]);<br>
+         create_frag_shader_lanczos(shader, ureg_imm1f(shader, (float)(a)),<br>
+                 ureg_scalar(ureg_src(t_array[i]), TGSI_SWIZZLE_Y), t_array[i]);<br>
+         ureg_MUL(shader, t_array[i + 1], ureg_src(t_array[i + 1]),<br>
+                  ureg_src(t_array[i]));<br>
+         ureg_MAD(shader, t_sum, ureg_src(t_array[i + 2]),<br>
+                  ureg_src(t_array[i + 1]), ureg_src(t_sum));<br>
+      }<br>
+   }<br>
+<br>
+   if (first)<br>
+      ureg_MOV(shader, o_fragment, ureg_imm1f(shader, 0.0f));<br>
+   else<br>
+      ureg_MOV(shader, o_fragment, ureg_src(t_sum));<br>
+<br>
+   ureg_release_temporary(shader, x);<br>
+   ureg_END(shader);<br>
+<br>
+   FREE(t_array);<br>
+   return ureg_create_shader_and_destroy(shader, filter->pipe);<br>
+}<br>
+<br>
+bool<br>
+vl_lanczos_filter_init(struct vl_lanczos_filter *filter, struct pipe_context *pipe,<br>
+                       unsigned size, unsigned width, unsigned height)<br>
+{<br>
+   struct pipe_rasterizer_state rs_state;<br>
+   struct pipe_blend_state blend;<br>
+   struct vertex2f *offsets, v, sizes;<br>
+   struct pipe_sampler_state sampler;<br>
+   struct pipe_vertex_element ve;<br>
+   unsigned i, num_offsets = (2 * size) * (2 * size);<br>
+<br>
+   assert(filter && pipe);<br>
+   assert(width && height);<br>
+   assert(size);<br>
+<br>
+   memset(filter, 0, sizeof(*filter));<br>
+   filter->pipe = pipe;<br>
+<br>
+   memset(&rs_state, 0, sizeof(rs_state));<br>
+   rs_state.half_pixel_center = true;<br>
+   rs_state.bottom_edge_rule = true;<br>
+   rs_state.depth_clip = 1;<br>
+   filter->rs_state = pipe->create_rasterizer_state(pipe, &rs_state);<br>
+   if (!filter->rs_state)<br>
+      goto error_rs_state;<br>
+<br>
+   memset(&blend, 0, sizeof blend);<br>
+   blend.rt[0].rgb_func = PIPE_BLEND_ADD;<br>
+   blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;<br>
+   blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;<br>
+   blend.rt[0].alpha_func = PIPE_BLEND_ADD;<br>
+   blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;<br>
+   blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;<br>
+   blend.logicop_func = PIPE_LOGICOP_CLEAR;<br>
+   blend.rt[0].colormask = PIPE_MASK_RGBA;<br>
+   filter->blend = pipe->create_blend_state(pipe, &blend);<br>
+   if (!filter->blend)<br>
+      goto error_blend;<br>
+<br>
+   memset(&sampler, 0, sizeof(sampler));<br>
+   sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;<br>
+   sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;<br>
+   sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;<br>
+   sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;<br>
+   sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;<br>
+   sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;<br>
+   sampler.compare_mode = PIPE_TEX_COMPARE_NONE;<br>
+   sampler.compare_func = PIPE_FUNC_ALWAYS;<br>
+   sampler.normalized_coords = 1;<br>
+   filter->sampler = pipe->create_sampler_state(pipe, &sampler);<br>
+   if (!filter->sampler)<br>
+      goto error_sampler;<br>
+<br>
+   filter->quad = vl_vb_upload_quads(pipe);<br>
+   if(!filter->quad.buffer)<br>
+      goto error_quad;<br>
+<br>
+   memset(&ve, 0, sizeof(ve));<br>
+   ve.src_offset = 0;<br>
+   ve.instance_divisor = 0;<br>
+   ve.vertex_buffer_index = 0;<br>
+   ve.src_format = PIPE_FORMAT_R32G32_FLOAT;<br>
+   filter->ves = pipe->create_vertex_elements_state(pipe, 1, &ve);<br>
+   if (!filter->ves)<br>
+      goto error_ves;<br>
+<br>
+   offsets = MALLOC(sizeof(struct vertex2f) * num_offsets);<br>
+   if (!offsets)<br>
+      goto error_offsets;<br>
+<br>
+   sizes.x = (float)(size);<br>
+   sizes.y = (float)(size);<br>
+<br>
+   for (v.y = -sizes.y + 1.0f, i = 0; v.y <= sizes.y; v.y += 1.0f)<br>
+      for (v.x = -sizes.x + 1.0f; v.x <= sizes.x; v.x += 1.0f)<br>
+         offsets[i++] = v;<br>
+<br>
+   for (i = 0; i < num_offsets; ++i) {<br>
+      offsets[i].x /= width;<br>
+      offsets[i].y /= height;<br>
+   }<br>
+<br>
+   filter->vs = create_vert_shader(filter);<br>
+   if (!filter->vs)<br>
+      goto error_vs;<br>
+<br>
+   filter->fs = create_frag_shader(filter, num_offsets, offsets, size, width, height);<br>
+   if (!filter->fs)<br>
+      goto error_fs;<br>
+<br>
+   FREE(offsets);<br>
+   return true;<br>
+<br>
+error_fs:<br>
+   pipe->delete_vs_state(pipe, filter->vs);<br>
+<br>
+error_vs:<br>
+   FREE(offsets);<br>
+<br>
+error_offsets:<br>
+   pipe->delete_vertex_elements_state(pipe, filter->ves);<br>
+<br>
+error_ves:<br>
+   pipe_resource_reference(&filter->quad.buffer, NULL);<br>
+<br>
+error_quad:<br>
+   pipe->delete_sampler_state(pipe, filter->sampler);<br>
+<br>
+error_sampler:<br>
+   pipe->delete_blend_state(pipe, filter->blend);<br>
+<br>
+error_blend:<br>
+   pipe->delete_rasterizer_state(pipe, filter->rs_state);<br>
+<br>
+error_rs_state:<br>
+   return false;<br>
+}<br>
+<br>
+void<br>
+vl_lanczos_filter_cleanup(struct vl_lanczos_filter *filter)<br>
+{<br>
+   assert(filter);<br>
+<br>
+   filter->pipe->delete_sampler_state(filter->pipe, filter->sampler);<br>
+   filter->pipe->delete_blend_state(filter->pipe, filter->blend);<br>
+   filter->pipe->delete_rasterizer_state(filter->pipe, filter->rs_state);<br>
+   filter->pipe->delete_vertex_elements_state(filter->pipe, filter->ves);<br>
+   pipe_resource_reference(&filter->quad.buffer, NULL);<br>
+<br>
+   filter->pipe->delete_vs_state(filter->pipe, filter->vs);<br>
+   filter->pipe->delete_fs_state(filter->pipe, filter->fs);<br>
+}<br>
+<br>
+void<br>
+vl_lanczos_filter_render(struct vl_lanczos_filter *filter,<br>
+                        struct pipe_sampler_view *src,<br>
+                        struct pipe_surface *dst,<br>
+                        struct u_rect *dst_area,<br>
+                        struct u_rect *dst_clip)<br>
+{<br>
+   struct pipe_viewport_state viewport;<br>
+   struct pipe_framebuffer_state fb_state;<br>
+   struct pipe_scissor_state scissor;<br>
+   union pipe_color_union clear_color;<br>
+   struct pipe_transfer *buf_transfer;<br>
+   struct pipe_resource *surface_size;<br>
+   assert(filter && src && dst);<br>
+<br>
+   if (dst_clip) {<br>
+      scissor.minx = dst_clip->x0;<br>
+      scissor.miny = dst_clip->y0;<br>
+      scissor.maxx = dst_clip->x1;<br>
+      scissor.maxy = dst_clip->y1;<br>
+   } else {<br>
+      scissor.minx = 0;<br>
+      scissor.miny = 0;<br>
+      scissor.maxx = dst->width;<br>
+      scissor.maxy = dst->height;<br>
+   }<br>
+<br>
+   clear_color.f[0] = clear_color.f[1] = 0.0f;<br>
+   clear_color.f[2] = clear_color.f[3] = 0.0f;<br>
+   surface_size = pipe_buffer_create<br>
+   (<br>
+      filter->pipe->screen,<br>
+      PIPE_BIND_CONSTANT_BUFFER,<br>
+      PIPE_USAGE_DEFAULT,<br>
+      2*sizeof(float)<br>
+   );<br>
+<br>
+<br>
+   memset(&viewport, 0, sizeof(viewport));<br>
+   if(dst_area){<br>
+      viewport.scale[0] = dst_area->x1 - dst_area->x0;<br>
+      viewport.scale[1] = dst_area->y1 - dst_area->y0;<br>
+      viewport.translate[0] = dst_area->x0;<br>
+      viewport.translate[1] = dst_area->y0;<br>
+   } else {<br>
+      viewport.scale[0] = dst->width;<br>
+      viewport.scale[1] = dst->height;<br>
+   }<br>
+   viewport.scale[2] = 1;<br>
+<br>
+   float *ptr = pipe_buffer_map(filter->pipe, surface_size,<br>
+                               PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_RANGE,<br>
+                               &buf_transfer);<br>
+<br>
+   ptr[0] = 0.5f/viewport.scale[0];<br>
+   ptr[1] = 0.5f/viewport.scale[1];<br>
+<br>
+   pipe_buffer_unmap(filter->pipe, buf_transfer);<br>
+<br>
+   memset(&fb_state, 0, sizeof(fb_state));<br>
+   fb_state.width = dst->width;<br>
+   fb_state.height = dst->height;<br>
+   fb_state.nr_cbufs = 1;<br>
+   fb_state.cbufs[0] = dst;<br>
+<br>
+   filter->pipe->set_scissor_states(filter->pipe, 0, 1, &scissor);<br>
+   filter->pipe->clear_render_target(filter->pipe, dst, &clear_color,<br>
+                                     0, 0, dst->width, dst->height);<br>
+   pipe_set_constant_buffer(filter->pipe, PIPE_SHADER_FRAGMENT, 0, surface_size);<br>
+   filter->pipe->bind_rasterizer_state(filter->pipe, filter->rs_state);<br>
+   filter->pipe->bind_blend_state(filter->pipe, filter->blend);<br>
+   filter->pipe->bind_sampler_states(filter->pipe, PIPE_SHADER_FRAGMENT,<br>
+                                     0, 1, &filter->sampler);<br>
+   filter->pipe->set_sampler_views(filter->pipe, PIPE_SHADER_FRAGMENT,<br>
+                                   0, 1, &src);<br>
+   filter->pipe->bind_vs_state(filter->pipe, filter->vs);<br>
+   filter->pipe->bind_fs_state(filter->pipe, filter->fs);<br>
+   filter->pipe->set_framebuffer_state(filter->pipe, &fb_state);<br>
+   filter->pipe->set_viewport_states(filter->pipe, 0, 1, &viewport);<br>
+   filter->pipe->set_vertex_buffers(filter->pipe, 0, 1, &filter->quad);<br>
+   filter->pipe->bind_vertex_elements_state(filter->pipe, filter->ves);<br>
+<br>
+   util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4);<br>
+}<br>
diff --git a/src/gallium/auxiliary/vl/vl_lanczos_filter.h b/src/gallium/auxiliary/vl/vl_lanczos_filter.h<br>
new file mode 100644<br>
index 0000000..cb469aa<br>
--- /dev/null<br>
+++ b/src/gallium/auxiliary/vl/vl_lanczos_filter.h<br>
@@ -0,0 +1,63 @@<br>
+/**************************************************************************<br>
+ *<br>
+ * Copyright 2016 Nayan Deshmukh.<br>
+ * All Rights Reserved.<br>
+ *<br>
+ * Permission is hereby granted, free of charge, to any person obtaining a<br>
+ * copy of this software and associated documentation files (the<br>
+ * "Software"), to deal in the Software without restriction, including<br>
+ * without limitation the rights to use, copy, modify, merge, publish,<br>
+ * distribute, sub license, and/or sell copies of the Software, and to<br>
+ * permit persons to whom the Software is furnished to do so, subject to<br>
+ * the following conditions:<br>
+ *<br>
+ * The above copyright notice and this permission notice (including the<br>
+ * next paragraph) shall be included in all copies or substantial portions<br>
+ * of the Software.<br>
+ *<br>
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS<br>
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF<br>
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.<br>
+ * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR<br>
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,<br>
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE<br>
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.<br>
+ *<br>
+ **************************************************************************/<br>
+<br>
+/* implementation of lanczos interpolation filter */<br>
+<br>
+#ifndef vl_lanczos_filter_h<br>
+#define vl_lanczos_filter_h<br>
+<br>
+#include "pipe/p_state.h"<br>
+<br>
+struct vl_lanczos_filter<br>
+{<br>
+   struct pipe_context *pipe;<br>
+   struct pipe_vertex_buffer quad;<br>
+<br>
+   void *rs_state;<br>
+   void *blend;<br>
+   void *sampler;<br>
+   void *ves;<br>
+   void *vs, *fs;<br>
+};<br>
+<br>
+bool<br>
+vl_lanczos_filter_init(struct vl_lanczos_filter *filter, struct pipe_context *pipe,<br>
+                       unsigned size, unsigned width, unsigned height);<br>
+<br>
+void<br>
+vl_lanczos_filter_cleanup(struct vl_lanczos_filter *filter);<br>
+<br>
+<br>
+void<br>
+vl_lanczos_filter_render(struct vl_lanczos_filter *filter,<br>
+                         struct pipe_sampler_view *src,<br>
+                         struct pipe_surface *dst,<br>
+                         struct u_rect *dst_area,<br>
+                         struct u_rect *dst_clip);<br>
+<br>
+<br>
+#endif /* vl_lanczos_filter_h */<br>
</blockquote>
<br>
<br>
</div></div></blockquote></div><br></div></div>