src/gallium/auxiliary/vl/vl_matrix_filter.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2012 Christian König.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <stdio.h>
  29
  30 #include "pipe/p_context.h"
  31
  32 #include "tgsi/tgsi_ureg.h"
  33
  34 #include "util/u_draw.h"
  35 #include "util/u_memory.h"
  36 #include "util/u_math.h"
  37
  38 #include "vl_types.h"
  39 #include "vl_vertex_buffers.h"
  40 #include "vl_matrix_filter.h"
  41
  42 enum VS_OUTPUT
  43 {
  44    VS_O_VPOS = 0,
  45    VS_O_VTEX = 0
  46 };
  47
  48 static void *
  49 create_vert_shader(struct vl_matrix_filter *filter)
  50 {
  51    struct ureg_program *shader;
  52    struct ureg_src i_vpos;
  53    struct ureg_dst o_vpos, o_vtex;
  54
  55    shader = ureg_create(PIPE_SHADER_VERTEX);
  56    if (!shader)
  57       return NULL;
  58
  59    i_vpos = ureg_DECL_vs_input(shader, 0);
  60    o_vpos = ureg_DECL_output(shader, TGSI_SEMANTIC_POSITION, VS_O_VPOS);
  61    o_vtex = ureg_DECL_output(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX);
  62
  63    ureg_MOV(shader, o_vpos, i_vpos);
  64    ureg_MOV(shader, o_vtex, i_vpos);
  65
  66    ureg_END(shader);
  67
  68    return ureg_create_shader_and_destroy(shader, filter->pipe);
  69 }
  70
  71 static inline bool
  72 is_vec_zero(struct vertex2f v)
  73 {
  74    return v.x == 0.0f && v.y == 0.0f;
  75 }
  76
  77 static void *
  78 create_frag_shader(struct vl_matrix_filter *filter, unsigned num_offsets,
  79                    struct vertex2f *offsets, const float *matrix_values)
  80 {
  81    struct ureg_program *shader;
  82    struct ureg_src i_vtex;
  83    struct ureg_src sampler;
  84    struct ureg_dst tmp;
  85    struct ureg_dst t_sum;
  86    struct ureg_dst o_fragment;
  87    unsigned i;
  88
  89    shader = ureg_create(PIPE_SHADER_FRAGMENT);
  90    if (!shader) {
  91       return NULL;
  92    }
  93
  94    i_vtex = ureg_DECL_fs_input(shader, TGSI_SEMANTIC_GENERIC, VS_O_VTEX, TGSI_INTERPOLATE_LINEAR);
  95    sampler = ureg_DECL_sampler(shader, 0);
  96    ureg_DECL_sampler_view(shader, 0, TGSI_TEXTURE_2D,
  97                           TGSI_RETURN_TYPE_FLOAT,
  98                           TGSI_RETURN_TYPE_FLOAT,
  99                           TGSI_RETURN_TYPE_FLOAT,
 100                           TGSI_RETURN_TYPE_FLOAT);
 101
 102    tmp = ureg_DECL_temporary(shader);
 103    t_sum = ureg_DECL_temporary(shader);
 104    o_fragment = ureg_DECL_output(shader, TGSI_SEMANTIC_COLOR, 0);
 105
 106    ureg_MOV(shader, t_sum, ureg_imm1f(shader, 0.0f));
 107    for (i = 0; i < num_offsets; ++i) {
 108       if (matrix_values[i] == 0.0f)
 109          continue;
 110
 111       if (!is_vec_zero(offsets[i])) {
 112          ureg_ADD(shader, ureg_writemask(tmp, TGSI_WRITEMASK_XY),
 113                   i_vtex, ureg_imm2f(shader, offsets[i].x, offsets[i].y));
 114          ureg_MOV(shader, ureg_writemask(tmp, TGSI_WRITEMASK_ZW),
 115                   ureg_imm1f(shader, 0.0f));
 116          ureg_TEX(shader, tmp, TGSI_TEXTURE_2D, ureg_src(tmp), sampler);
 117       } else {
 118          ureg_TEX(shader, tmp, TGSI_TEXTURE_2D, i_vtex, sampler);
 119       }
 120       ureg_MAD(shader, t_sum, ureg_src(tmp), ureg_imm1f(shader, matrix_values[i]),
 121                ureg_src(t_sum));
 122    }
 123
 124    ureg_MOV(shader, o_fragment, ureg_src(t_sum));
 125
 126    ureg_END(shader);
 127
 128    return ureg_create_shader_and_destroy(shader, filter->pipe);
 129 }
 130
 131 bool
 132 vl_matrix_filter_init(struct vl_matrix_filter *filter, struct pipe_context *pipe,
 133                       unsigned video_width, unsigned video_height,
 134                       unsigned matrix_width, unsigned matrix_height,
 135                       const float *matrix_values)
 136 {
 137    struct pipe_rasterizer_state rs_state;
 138    struct pipe_blend_state blend;
 139    struct pipe_sampler_state sampler;
 140    struct pipe_vertex_element ve;
 141    struct vertex2f *offsets, v, sizes;
 142    unsigned i, num_offsets = matrix_width * matrix_height;
 143
 144    assert(filter && pipe);
 145    assert(video_width && video_height);
 146    assert(matrix_width && matrix_height);
 147
 148    memset(filter, 0, sizeof(*filter));
 149    filter->pipe = pipe;
 150
 151    memset(&rs_state, 0, sizeof(rs_state));
 152    rs_state.half_pixel_center = true;
 153    rs_state.bottom_edge_rule = true;
 154    rs_state.depth_clip = 1;
 155    filter->rs_state = pipe->create_rasterizer_state(pipe, &rs_state);
 156    if (!filter->rs_state)
 157       goto error_rs_state;
 158
 159    memset(&blend, 0, sizeof blend);
 160    blend.rt[0].rgb_func = PIPE_BLEND_ADD;
 161    blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 162    blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ONE;
 163    blend.rt[0].alpha_func = PIPE_BLEND_ADD;
 164    blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 165    blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
 166    blend.logicop_func = PIPE_LOGICOP_CLEAR;
 167    blend.rt[0].colormask = PIPE_MASK_RGBA;
 168    filter->blend = pipe->create_blend_state(pipe, &blend);
 169    if (!filter->blend)
 170       goto error_blend;
 171
 172    memset(&sampler, 0, sizeof(sampler));
 173    sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 174    sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 175    sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 176    sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 177    sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 178    sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 179    sampler.compare_mode = PIPE_TEX_COMPARE_NONE;
 180    sampler.compare_func = PIPE_FUNC_ALWAYS;
 181    sampler.normalized_coords = 1;
 182    filter->sampler = pipe->create_sampler_state(pipe, &sampler);
 183    if (!filter->sampler)
 184       goto error_sampler;
 185
 186    filter->quad = vl_vb_upload_quads(pipe);
 187    if(!filter->quad.buffer.resource)
 188       goto error_quad;
 189
 190    memset(&ve, 0, sizeof(ve));
 191    ve.src_offset = 0;
 192    ve.instance_divisor = 0;
 193    ve.vertex_buffer_index = 0;
 194    ve.src_format = PIPE_FORMAT_R32G32_FLOAT;
 195    filter->ves = pipe->create_vertex_elements_state(pipe, 1, &ve);
 196    if (!filter->ves)
 197       goto error_ves;
 198
 199    offsets = MALLOC(sizeof(struct vertex2f) * num_offsets);
 200    if (!offsets)
 201       goto error_offsets;
 202
 203    sizes.x = (float)(matrix_width - 1) / 2.0f;
 204    sizes.y = (float)(matrix_height - 1) / 2.0f;
 205
 206    for (v.x = -sizes.x, i = 0; v.x <= sizes.x; v.x += 1.0f)
 207       for (v.y = -sizes.y; v.y <= sizes.y; v.y += 1.0f)
 208          offsets[i++] = v;
 209
 210    for (i = 0; i < num_offsets; ++i) {
 211       offsets[i].x /= video_width;
 212       offsets[i].y /= video_height;
 213    }
 214
 215    filter->vs = create_vert_shader(filter);
 216    if (!filter->vs)
 217       goto error_vs;
 218
 219    filter->fs = create_frag_shader(filter, num_offsets, offsets, matrix_values);
 220    if (!filter->fs)
 221       goto error_fs;
 222
 223    FREE(offsets);
 224    return true;
 225
 226 error_fs:
 227    pipe->delete_vs_state(pipe, filter->vs);
 228
 229 error_vs:
 230    FREE(offsets);
 231
 232 error_offsets:
 233    pipe->delete_vertex_elements_state(pipe, filter->ves);
 234
 235 error_ves:
 236    pipe_resource_reference(&filter->quad.buffer.resource, NULL);
 237
 238 error_quad:
 239    pipe->delete_sampler_state(pipe, filter->sampler);
 240
 241 error_sampler:
 242    pipe->delete_blend_state(pipe, filter->blend);
 243
 244 error_blend:
 245    pipe->delete_rasterizer_state(pipe, filter->rs_state);
 246
 247 error_rs_state:
 248    return false;
 249 }
 250
 251 void
 252 vl_matrix_filter_cleanup(struct vl_matrix_filter *filter)
 253 {
 254    assert(filter);
 255
 256    filter->pipe->delete_sampler_state(filter->pipe, filter->sampler);
 257    filter->pipe->delete_blend_state(filter->pipe, filter->blend);
 258    filter->pipe->delete_rasterizer_state(filter->pipe, filter->rs_state);
 259    filter->pipe->delete_vertex_elements_state(filter->pipe, filter->ves);
 260    pipe_resource_reference(&filter->quad.buffer.resource, NULL);
 261
 262    filter->pipe->delete_vs_state(filter->pipe, filter->vs);
 263    filter->pipe->delete_fs_state(filter->pipe, filter->fs);
 264 }
 265
 266 void
 267 vl_matrix_filter_render(struct vl_matrix_filter *filter,
 268                         struct pipe_sampler_view *src,
 269                         struct pipe_surface *dst)
 270 {
 271    struct pipe_viewport_state viewport;
 272    struct pipe_framebuffer_state fb_state;
 273
 274    assert(filter && src && dst);
 275
 276    memset(&viewport, 0, sizeof(viewport));
 277    viewport.scale[0] = dst->width;
 278    viewport.scale[1] = dst->height;
 279    viewport.scale[2] = 1;
 280
 281    memset(&fb_state, 0, sizeof(fb_state));
 282    fb_state.width = dst->width;
 283    fb_state.height = dst->height;
 284    fb_state.nr_cbufs = 1;
 285    fb_state.cbufs[0] = dst;
 286
 287    filter->pipe->bind_rasterizer_state(filter->pipe, filter->rs_state);
 288    filter->pipe->bind_blend_state(filter->pipe, filter->blend);
 289    filter->pipe->bind_sampler_states(filter->pipe, PIPE_SHADER_FRAGMENT,
 290                                      0, 1, &filter->sampler);
 291    filter->pipe->set_sampler_views(filter->pipe, PIPE_SHADER_FRAGMENT,
 292                                    0, 1, &src);
 293    filter->pipe->bind_vs_state(filter->pipe, filter->vs);
 294    filter->pipe->bind_fs_state(filter->pipe, filter->fs);
 295    filter->pipe->set_framebuffer_state(filter->pipe, &fb_state);
 296    filter->pipe->set_viewport_states(filter->pipe, 0, 1, &viewport);
 297    filter->pipe->set_vertex_buffers(filter->pipe, 0, 1, &filter->quad);
 298    filter->pipe->bind_vertex_elements_state(filter->pipe, filter->ves);
 299
 300    util_draw_arrays(filter->pipe, PIPE_PRIM_QUADS, 0, 4);
 301 }