<div dir="ltr">Hi Christian,<div> </div><div>Thanks for the review.</div><div> </div><div class="gmail_extra"> <div class="gmail_quote">On Tue, Jul 19, 2016 at 4:58 PM, Christian König <<a href="mailto:deathsimple@vodafone.de" target="_blank">deathsimple@vodafone.de</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Am 18.07.2016 um 21:55 schrieb Nayan Deshmukh: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> v2: avoiding dividing by zero when calculating lanczos Signed-off-by: Nayan Deshmukh <<a href="mailto:nayan26deshmukh@gmail.com" target="_blank">nayan26deshmukh@gmail.com</a>> </blockquote> That looks much better, but there are still quite a bunch of artifacts. Take a look at the attached screenshots. good.jpg was created with hqscalling=0, bad with hqscalling=7. Especially on the left side we have lines from top to bottom where there shouldn't be any. Regards, Christian.<div><div> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> --- src/gallium/auxiliary/Makefile.sources | 2 + src/gallium/auxiliary/vl/vl_lanczos_filter.c | 447 +++++++++++++++++++++++++++ src/gallium/auxiliary/vl/vl_lanczos_filter.h | 63 ++++ 3 files changed, 512 insertions(+) create mode 100644 src/gallium/auxiliary/vl/vl_lanczos_filter.c create mode 100644 src/gallium/auxiliary/vl/vl_lanczos_filter.h diff --git a/src/gallium/auxiliary/Makefile.sources b/src/gallium/auxiliary/Makefile.sources index e0311bf..4eb0f65 100644 --- a/src/gallium/auxiliary/Makefile.sources +++ b/src/gallium/auxiliary/Makefile.sources @@ -330,6 +330,8 @@ VL_SOURCES := \ vl/vl_deint_filter.h \ vl/vl_idct.c \ vl/vl_idct.h \ + vl/vl_lanczos_filter.c \ + vl/vl_lanczos_filter.h \ vl/vl_matrix_filter.c \ vl/vl_matrix_filter.h \ vl/vl_mc.c \ diff --git a/src/gallium/auxiliary/vl/vl_lanczos_filter.c b/src/gallium/auxiliary/vl/vl_lanczos_filter.c new file mode 100644 index 0000000..7c69555 --- /dev/null +++ b/src/gallium/auxiliary/vl/vl_lanczos_filter.c @@ -0,0 +1,447 @@ +/************************************************************************** + * + * Copyright 2016 Nayan Deshmukh. + * 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 VMWARE 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 <stdio.h> + +#include "pipe/p_context.h" + +#include "tgsi/tgsi_ureg.h" + +#include "util/u_draw.h" +#include "util/u_memory.h" +#include "util/u_math.h" +#include "util/u_rect.h" + +#include "vl_types.h" +#include "vl_vertex_buffers.h" +#include "vl_lanczos_filter.h" + +enum VS_OUTPUT +{ + VS_O_VPOS = 0, + VS_O_VTEX = 0 +}; + +static void * +create_vert_shader(struct vl_lanczos_filter *filter) +{ + struct ureg_program *shader; + struct ureg_src i_vpos; + struct ureg_dst o_vpos, o_vtex; + + shader = ureg_create(PIPE_SHADER_VERTEX); + if (!shader) + return NULL; + + i_vpos = ureg_DECL_vs_input(shader, 0); + o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS); + o_vtex = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX); + + ureg_MOV(shader, o_vpos, i_vpos); + ureg_MOV(shader, o_vtex, i_vpos); + + ureg_END(shader); + + return ureg_create_shader_and_destroy(shader, filter->pipe); +} + +static void +create_frag_shader_lanczos(struct ureg_program *shader, struct ureg_src a, + struct ureg_src x, struct ureg_dst o_fragment) +{ + struct ureg_dst temp[8]; + unsigned i; + + for(i = 0; i < 8; ++i) + temp[i] = ureg_DECL_temporary(shader); + + /* + * temp[0] = (x == 0) ? 1.0f : x + * temp[7] = (sin(pi * x) * sin ((pi * x)/a)) / x^2 + * o_fragment = (x == 0) ? 1.0f : temp[7] + */ + ureg_MOV(shader, temp[0], x); + ureg_SEQ(shader, temp[1], x, ureg_imm1f(shader, 0.0f)); + + ureg_LRP(shader, temp[0], ureg_src(temp[1]), + ureg_imm1f(shader, 1.0f), ureg_src(temp[0])); + + ureg_MUL(shader, temp[2], x, + ureg_imm1f(shader, 3.141592)); + ureg_DIV(shader, temp[3], ureg_src(temp[2]), a); + + ureg_SIN(shader, temp[4], ureg_src(temp[2])); + ureg_SIN(shader, temp[5], ureg_src(temp[3])); + + ureg_MUL(shader, temp[6], ureg_src(temp[4]), + ureg_src(temp[5])); + ureg_MUL(shader, temp[7], ureg_imm1f(shader, + 0.101321), a); + ureg_MUL(shader, temp[7], ureg_src(temp[7]), + ureg_src(temp[6])); + ureg_DIV(shader, temp[7], ureg_src(temp[7]), + ureg_src(temp[0])); + ureg_DIV(shader, o_fragment, + ureg_src(temp[7]), ureg_src(temp[0])); + + ureg_LRP(shader, o_fragment, ureg_src(temp[1]), + ureg_imm1f(shader, 1.0f), ureg_src(o_fragment)); + + for(i = 0; i < 8; ++i) + ureg_release_temporary(shader, temp[i]); +} + +static void * +create_frag_shader(struct vl_lanczos_filter *filter, unsigned num_offsets, + struct vertex2f *offsets, unsigned a, + unsigned video_width, unsigned video_height) +{ + struct pipe_screen *screen = filter->pipe->screen; + struct ureg_program *shader; + struct ureg_src i_vtex, vtex; + struct ureg_src sampler; + struct ureg_src half_pixel; + struct ureg_dst o_fragment; + struct ureg_dst *t_array = MALLOC(sizeof(struct ureg_dst) * (num_offsets + 2)); + struct ureg_dst x, t_sum; + unsigned i; + bool first; + + if (screen->get_shader_param( + screen, PIPE_SHADER_FRAGMENT, PIPE_SHADER_CAP_MAX_TEMPS) < num_offsets + 2) { + return NULL; + } + + shader = ureg_create(PIPE_SHADER_FRAGMENT); + if (!shader) { + return NULL; + } + + i_vtex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR); + sampler = ureg_DECL_sampler(shader, 0); + + for (i = 0; i < num_offsets + 2; ++i) + t_array[i] = ureg_DECL_temporary(shader); + x = ureg_DECL_temporary(shader); + + half_pixel = ureg_DECL_constant(shader, 0); + o_fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0); + + /* + * temp = (i_vtex - (0.5/dst_size)) * i_size) + * x = frac(temp) + * vtex = floor(i_vtex)/i_size + half_pixel + */ </blockquote></div></div></blockquote><div> </div><div>This seems to be the reason for the artifacts.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> + ureg_SUB(shader, ureg_writemask(t_array[0], TGSI_WRITEMASK_XY), + i_vtex, half_pixel); </blockquote></div></div></blockquote><div> </div><div>On debugging I found that after removing this ^^^ instruction the artifacts are gone.</div><div>Not sure why is this happening but the filter is working fine.</div><div> </div><div>Any ideas Christian?</div><div> </div><div>Regards,</div><div>Nayan. </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> + ureg_MUL(shader, ureg_writemask(t_array[1], TGSI_WRITEMASK_XY), + ureg_src(t_array[0]), ureg_imm2f(shader, video_width, video_height)); + ureg_FRC(shader, ureg_writemask(x, TGSI_WRITEMASK_XY), + ureg_src(t_array[1])); + + ureg_FLR(shader, ureg_writemask(t_array[1], TGSI_WRITEMASK_XY), + ureg_src(t_array[1])); + ureg_DIV(shader, ureg_writemask(t_array[1], TGSI_WRITEMASK_XY), + ureg_src(t_array[1]), ureg_imm2f(shader, video_width, video_height)); + ureg_ADD(shader, ureg_writemask(t_array[1], TGSI_WRITEMASK_XY), + ureg_src(t_array[1]), half_pixel); + /* + * t_array[2..*] = vtex + offset[0..*] + * t_array[2..*] = tex(t_array[0..*], sampler) + * o_fragment = sum(t_array[i] * lanczos(x - offsets[i].x) * lanczos(y - offsets[i].y)) + */ + vtex = ureg_src(t_array[1]); + for (i = 0; i < num_offsets; ++i) { + ureg_ADD(shader, ureg_writemask(t_array[i + 2], TGSI_WRITEMASK_XY), + vtex, ureg_imm2f(shader, offsets[i].x, offsets[i].y)); + ureg_MOV(shader, ureg_writemask(t_array[i + 2], TGSI_WRITEMASK_ZW), + ureg_imm1f(shader, 0.0f)); + } + + for (i = 0; i < num_offsets; ++i) { + ureg_TEX(shader, t_array[i + 2], TGSI_TEXTURE_2D, ureg_src(t_array[i + 2]), sampler); + } + + for(i = 0, first = true; i < num_offsets; ++i) { + if (first) { + t_sum = t_array[i + 2]; + ureg_SUB(shader, ureg_writemask(t_array[i], TGSI_WRITEMASK_XY), + ureg_src(x), ureg_imm2f(shader, offsets[i].x * video_width, + offsets[i].y * video_height)); + create_frag_shader_lanczos(shader, ureg_imm1f(shader, (float)(a)), + ureg_scalar(ureg_src(t_array[i]), TGSI_SWIZZLE_X), t_array[i + 1]); + create_frag_shader_lanczos(shader, ureg_imm1f(shader, (float)(a)), + ureg_scalar(ureg_src(t_array[i]), TGSI_SWIZZLE_Y), t_array[i]); + ureg_MUL(shader, t_array[i + 1], ureg_src(t_array[i + 1]), + ureg_src(t_array[i])); + ureg_MUL(shader, t_sum, ureg_src(t_array[i + 2]), + ureg_src(t_array[i + 1])); + first = false; + } else { + ureg_SUB(shader, ureg_writemask(t_array[i], TGSI_WRITEMASK_XY), + ureg_src(x), ureg_imm2f(shader, offsets[i].x * video_width, + offsets[i].y * video_height)); + create_frag_shader_lanczos(shader, ureg_imm1f(shader, (float)(a)), + ureg_scalar(ureg_src(t_array[i]), TGSI_SWIZZLE_X), t_array[i + 1]); + create_frag_shader_lanczos(shader, ureg_imm1f(shader, (float)(a)), + ureg_scalar(ureg_src(t_array[i]), TGSI_SWIZZLE_Y), t_array[i]); + ureg_MUL(shader, t_array[i + 1], ureg_src(t_array[i + 1]), + ureg_src(t_array[i])); + ureg_MAD(shader, t_sum, ureg_src(t_array[i + 2]), + ureg_src(t_array[i + 1]), ureg_src(t_sum)); + } + } + + if (first) + ureg_MOV(shader, o_fragment, ureg_imm1f(shader, 0.0f)); + else + ureg_MOV(shader, o_fragment, ureg_src(t_sum)); + + ureg_release_temporary(shader, x); + ureg_END(shader); + + FREE(t_array); + return ureg_create_shader_and_destroy(shader, filter->pipe); +} + +bool +vl_lanczos_filter_init(struct vl_lanczos_filter *filter, struct pipe_context *pipe, + unsigned size, unsigned width, unsigned height) +{ + struct pipe_rasterizer_state rs_state; + struct pipe_blend_state blend; + struct vertex2f *offsets, v, sizes; + struct pipe_sampler_state sampler; + struct pipe_vertex_element ve; + unsigned i, num_offsets = (2 * size) * (2 * size); + + assert(filter && pipe); + assert(width && height); + assert(size); + + memset(filter, 0, sizeof(*filter)); + filter->pipe = pipe; + + memset(&rs_state, 0, sizeof(rs_state)); + rs_state.half_pixel_center = true; + rs_state.bottom_edge_rule = true; + rs_state.depth_clip = 1; + filter->rs_state = pipe->create_rasterizer_state(pipe, &rs_state); + if (!filter->rs_state) + goto error_rs_state; + + memset(&blend, 0, sizeof blend); + 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_func = PIPE_LOGICOP_CLEAR; + blend.rt[0].colormask = PIPE_MASK_RGBA; + filter->blend = pipe->create_blend_state(pipe, &blend); + if (!filter->blend) + goto error_blend; + + memset(&sampler, 0, sizeof(sampler)); + sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE; + sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE; + 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; + filter->sampler = pipe->create_sampler_state(pipe, &sampler); + if (!filter->sampler) + goto error_sampler; + + filter->quad = vl_vb_upload_quads(pipe); + if(!filter->quad.buffer) + goto error_quad; + + memset(&ve, 0, sizeof(ve)); + ve.src_offset = 0; + ve.instance_divisor = 0; + ve.vertex_buffer_index = 0; + ve.src_format = PIPE_FORMAT_R32G32_FLOAT; + filter->ves = pipe->create_vertex_elements_state(pipe, 1, &ve); + if (!filter->ves) + goto error_ves; + + offsets = MALLOC(sizeof(struct vertex2f) * num_offsets); + if (!offsets) + goto error_offsets; + + sizes.x = (float)(size); + sizes.y = (float)(size); + + for (v.x = -sizes.x + 1.0f, i = 0; v.x <= sizes.x; v.x += 1.0f) + for (v.y = -sizes.y + 1.0f; v.y <= sizes.y; v.y += 1.0f) + offsets[i++] = v; + + for (i = 0; i < num_offsets; ++i) { + offsets[i].x /= width; + offsets[i].y /= height; + } + + filter->vs = create_vert_shader(filter); + if (!filter->vs) + goto error_vs; + + filter->fs = create_frag_shader(filter, num_offsets, offsets, size, width, height); + if (!filter->fs) + goto error_fs; + + FREE(offsets); + return true; + +error_fs: + pipe->delete_vs_state(pipe, filter->vs); + +error_vs: + FREE(offsets); + +error_offsets: + pipe->delete_vertex_elements_state(pipe, filter->ves); + +error_ves: + pipe_resource_reference(&filter->quad.buffer, NULL); + +error_quad: + pipe->delete_sampler_state(pipe, filter->sampler); + +error_sampler: + pipe->delete_blend_state(pipe, filter->blend); + +error_blend: + pipe->delete_rasterizer_state(pipe, filter->rs_state); + +error_rs_state: + return false; +} + +void +vl_lanczos_filter_cleanup(struct vl_lanczos_filter *filter) +{ + assert(filter); + + filter->pipe->delete_sampler_state(filter->pipe, filter->sampler); + filter->pipe->delete_blend_state(filter->pipe, filter->blend); + filter->pipe->delete_rasterizer_state(filter->pipe, filter->rs_state); + filter->pipe->delete_vertex_elements_state(filter->pipe, filter->ves); + pipe_resource_reference(&filter->quad.buffer, NULL); + + filter->pipe->delete_vs_state(filter->pipe, filter->vs); + filter->pipe->delete_fs_state(filter->pipe, filter->fs); +} + +void +vl_lanczos_filter_render(struct vl_lanczos_filter *filter, + struct pipe_sampler_view *src, + struct pipe_surface *dst, + struct u_rect *dst_area, + struct u_rect *dst_clip) +{ + struct pipe_viewport_state viewport; + struct pipe_framebuffer_state fb_state; + struct pipe_scissor_state scissor; + union pipe_color_union clear_color; + struct pipe_transfer *buf_transfer; + struct pipe_resource *surface_size; + assert(filter && src && dst); + + if (dst_clip) { + scissor.minx = dst_clip->x0; + scissor.miny = dst_clip->y0; + scissor.maxx = dst_clip->x1; + scissor.maxy = dst_clip->y1; + } else { + scissor.minx = 0; + scissor.miny = 0; + scissor.maxx = dst->width; + scissor.maxy = dst->height; + } + + clear_color.f[0] = clear_color.f[1] = 0.0f; + clear_color.f[2] = clear_color.f[3] = 0.0f; + surface_size = pipe_buffer_create + ( + filter->pipe->screen, + PIPE_BIND_CONSTANT_BUFFER, + PIPE_USAGE_DEFAULT, + 2*sizeof(float) + ); + + + memset(&viewport, 0, sizeof(viewport)); + if(dst_area){ + viewport.scale[0] = dst_area->x1 - dst_area->x0; + viewport.scale[1] = dst_area->y1 - dst_area->y0; + viewport.translate[0] = dst_area->x0; + viewport.translate[1] = dst_area->y0; + } else { + viewport.scale[0] = dst->width; + viewport.scale[1] = dst->height; + } + viewport.scale[2] = 1; + + float *ptr = pipe_buffer_map(filter->pipe, surface_size, + PIPE_TRANSFER_WRITE | PIPE_TRANSFER_DISCARD_RANGE, + &buf_transfer); + + ptr[0] = 0.5f/viewport.scale[0]; + ptr[1] = 0.5f/viewport.scale[1]; + + pipe_buffer_unmap(filter->pipe, buf_transfer); + + memset(&fb_state, 0, sizeof(fb_state)); + fb_state.width = dst->width; + fb_state.height = dst->height; + fb_state.nr_cbufs = 1; + fb_state.cbufs[0] = dst; + + filter->pipe->set_scissor_states(filter->pipe, 0, 1, &scissor); + filter->pipe->clear_render_target(filter->pipe, dst, &clear_color, + 0, 0, dst->width, dst->height); + pipe_set_constant_buffer(filter->pipe, PIPE_SHADER_FRAGMENT, 0, surface_size); + filter->pipe->bind_rasterizer_state(filter->pipe, filter->rs_state); + filter->pipe->bind_blend_state(filter->pipe, filter->blend); + filter->pipe->bind_sampler_states(filter->pipe, PIPE_SHADER_FRAGMENT, + 0, 1, &filter->sampler); + filter->pipe->set_sampler_views(filter->pipe, PIPE_SHADER_FRAGMENT, + 0, 1, &src); + filter->pipe->bind_vs_state(filter->pipe, filter->vs); + filter->pipe->bind_fs_state(filter->pipe, filter->fs); + filter->pipe->set_framebuffer_state(filter->pipe, &fb_state); + filter->pipe->set_viewport_states(filter->pipe, 0, 1, &viewport); + filter->pipe->set_vertex_buffers(filter->pipe, 0, 1, &filter->quad); + filter->pipe->bind_vertex_elements_state(filter->pipe, filter->ves); + + util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4); +} diff --git a/src/gallium/auxiliary/vl/vl_lanczos_filter.h b/src/gallium/auxiliary/vl/vl_lanczos_filter.h new file mode 100644 index 0000000..cb469aa --- /dev/null +++ b/src/gallium/auxiliary/vl/vl_lanczos_filter.h @@ -0,0 +1,63 @@ +/************************************************************************** + * + * Copyright 2016 Nayan Deshmukh. + * 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 VMWARE 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. + * + **************************************************************************/ + +/* implementation of lanczos interpolation filter */ + +#ifndef vl_lanczos_filter_h +#define vl_lanczos_filter_h + +#include "pipe/p_state.h" + +struct vl_lanczos_filter +{ + struct pipe_context *pipe; + struct pipe_vertex_buffer quad; + + void *rs_state; + void *blend; + void *sampler; + void *ves; + void *vs, *fs; +}; + +bool +vl_lanczos_filter_init(struct vl_lanczos_filter *filter, struct pipe_context *pipe, + unsigned size, unsigned width, unsigned height); + +void +vl_lanczos_filter_cleanup(struct vl_lanczos_filter *filter); + + +void +vl_lanczos_filter_render(struct vl_lanczos_filter *filter, + struct pipe_sampler_view *src, + struct pipe_surface *dst, + struct u_rect *dst_area, + struct u_rect *dst_clip); + + +#endif /* vl_lanczos_filter_h */ </blockquote> </div></div></blockquote></div> </div></div>