src/gallium/state_trackers/xorg/xorg_renderer.c

   1 #include "xorg_exa.h"
   2 #include "xorg_renderer.h"
   3
   4 #include "xorg_exa_tgsi.h"
   5
   6 #include "cso_cache/cso_context.h"
   7 #include "util/u_draw_quad.h"
   8 #include "util/u_math.h"
   9 #include "util/u_memory.h"
  10 #include "util/u_sampler.h"
  11
  12 #include "util/u_inlines.h"
  13 #include "util/u_box.h"
  14
  15 #include <math.h>
  16
  17 #define floatsEqual(x, y) (fabs(x - y) <= 0.00001f * MIN2(fabs(x), fabs(y)))
  18 #define floatIsZero(x) (floatsEqual((x) + 1, 1))
  19
  20 #define NUM_COMPONENTS 4
  21
  22 static INLINE boolean is_affine(float *matrix)
  23 {
  24    return floatIsZero(matrix[2]) && floatIsZero(matrix[5])
  25       && floatsEqual(matrix[8], 1);
  26 }
  27 static INLINE void map_point(float *mat, float x, float y,
  28                              float *out_x, float *out_y)
  29 {
  30    if (!mat) {
  31       *out_x = x;
  32       *out_y = y;
  33       return;
  34    }
  35
  36    *out_x = mat[0]*x + mat[3]*y + mat[6];
  37    *out_y = mat[1]*x + mat[4]*y + mat[7];
  38    if (!is_affine(mat)) {
  39       float w = 1/(mat[2]*x + mat[5]*y + mat[8]);
  40       *out_x *= w;
  41       *out_y *= w;
  42    }
  43 }
  44
  45 static INLINE void
  46 renderer_draw(struct xorg_renderer *r)
  47 {
  48    int num_verts = r->buffer_size/(r->attrs_per_vertex * NUM_COMPONENTS);
  49
  50    if (!r->buffer_size)
  51       return;
  52
  53    cso_set_vertex_elements(r->cso, r->attrs_per_vertex, r->velems);
  54    util_draw_user_vertex_buffer(r->cso, r->buffer, PIPE_PRIM_QUADS,
  55                                 num_verts, r->attrs_per_vertex);
  56
  57    r->buffer_size = 0;
  58 }
  59
  60 static INLINE void
  61 renderer_draw_conditional(struct xorg_renderer *r,
  62                           int next_batch)
  63 {
  64    if (r->buffer_size + next_batch >= BUF_SIZE ||
  65        (next_batch == 0 && r->buffer_size)) {
  66       renderer_draw(r);
  67    }
  68 }
  69
  70 static void
  71 renderer_init_state(struct xorg_renderer *r)
  72 {
  73    struct pipe_depth_stencil_alpha_state dsa;
  74    struct pipe_rasterizer_state raster;
  75    unsigned i;
  76
  77    /* set common initial clip state */
  78    memset(&dsa, 0, sizeof(struct pipe_depth_stencil_alpha_state));
  79    cso_set_depth_stencil_alpha(r->cso, &dsa);
  80
  81
  82    /* XXX: move to renderer_init_state? */
  83    memset(&raster, 0, sizeof(struct pipe_rasterizer_state));
  84    raster.gl_rasterization_rules = 1;
  85    raster.depth_clip = 1;
  86    cso_set_rasterizer(r->cso, &raster);
  87
  88    /* vertex elements state */
  89    memset(&r->velems[0], 0, sizeof(r->velems[0]) * 3);
  90    for (i = 0; i < 3; i++) {
  91       r->velems[i].src_offset = i * 4 * sizeof(float);
  92       r->velems[i].instance_divisor = 0;
  93       r->velems[i].vertex_buffer_index = 0;
  94       r->velems[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
  95    }
  96 }
  97
  98
  99 static INLINE void
 100 add_vertex_color(struct xorg_renderer *r,
 101                  float x, float y,
 102                  float color[4])
 103 {
 104    float *vertex = r->buffer + r->buffer_size;
 105
 106    vertex[0] = x;
 107    vertex[1] = y;
 108    vertex[2] = 0.f; /*z*/
 109    vertex[3] = 1.f; /*w*/
 110
 111    vertex[4] = color[0]; /*r*/
 112    vertex[5] = color[1]; /*g*/
 113    vertex[6] = color[2]; /*b*/
 114    vertex[7] = color[3]; /*a*/
 115
 116    r->buffer_size += 8;
 117 }
 118
 119 static INLINE void
 120 add_vertex_1tex(struct xorg_renderer *r,
 121                 float x, float y, float s, float t)
 122 {
 123    float *vertex = r->buffer + r->buffer_size;
 124
 125    vertex[0] = x;
 126    vertex[1] = y;
 127    vertex[2] = 0.f; /*z*/
 128    vertex[3] = 1.f; /*w*/
 129
 130    vertex[4] = s;   /*s*/
 131    vertex[5] = t;   /*t*/
 132    vertex[6] = 0.f; /*r*/
 133    vertex[7] = 1.f; /*q*/
 134
 135    r->buffer_size += 8;
 136 }
 137
 138 static void
 139 add_vertex_data1(struct xorg_renderer *r,
 140                  float srcX, float srcY,  float dstX, float dstY,
 141                  float width, float height,
 142                  struct pipe_resource *src, float *src_matrix)
 143 {
 144    float s0, t0, s1, t1, s2, t2, s3, t3;
 145    float pt0[2], pt1[2], pt2[2], pt3[2];
 146
 147    pt0[0] = srcX;
 148    pt0[1] = srcY;
 149    pt1[0] = (srcX + width);
 150    pt1[1] = srcY;
 151    pt2[0] = (srcX + width);
 152    pt2[1] = (srcY + height);
 153    pt3[0] = srcX;
 154    pt3[1] = (srcY + height);
 155
 156    if (src_matrix) {
 157       map_point(src_matrix, pt0[0], pt0[1], &pt0[0], &pt0[1]);
 158       map_point(src_matrix, pt1[0], pt1[1], &pt1[0], &pt1[1]);
 159       map_point(src_matrix, pt2[0], pt2[1], &pt2[0], &pt2[1]);
 160       map_point(src_matrix, pt3[0], pt3[1], &pt3[0], &pt3[1]);
 161    }
 162
 163    s0 =  pt0[0] / src->width0;
 164    s1 =  pt1[0] / src->width0;
 165    s2 =  pt2[0] / src->width0;
 166    s3 =  pt3[0] / src->width0;
 167    t0 =  pt0[1] / src->height0;
 168    t1 =  pt1[1] / src->height0;
 169    t2 =  pt2[1] / src->height0;
 170    t3 =  pt3[1] / src->height0;
 171
 172    /* 1st vertex */
 173    add_vertex_1tex(r, dstX, dstY, s0, t0);
 174    /* 2nd vertex */
 175    add_vertex_1tex(r, dstX + width, dstY, s1, t1);
 176    /* 3rd vertex */
 177    add_vertex_1tex(r, dstX + width, dstY + height, s2, t2);
 178    /* 4th vertex */
 179    add_vertex_1tex(r, dstX, dstY + height, s3, t3);
 180 }
 181
 182
 183 static INLINE void
 184 add_vertex_2tex(struct xorg_renderer *r,
 185                 float x, float y,
 186                 float s0, float t0, float s1, float t1)
 187 {
 188    float *vertex = r->buffer + r->buffer_size;
 189
 190    vertex[0] = x;
 191    vertex[1] = y;
 192    vertex[2] = 0.f; /*z*/
 193    vertex[3] = 1.f; /*w*/
 194
 195    vertex[4] = s0;  /*s*/
 196    vertex[5] = t0;  /*t*/
 197    vertex[6] = 0.f; /*r*/
 198    vertex[7] = 1.f; /*q*/
 199
 200    vertex[8] = s1;  /*s*/
 201    vertex[9] = t1;  /*t*/
 202    vertex[10] = 0.f; /*r*/
 203    vertex[11] = 1.f; /*q*/
 204
 205    r->buffer_size += 12;
 206 }
 207
 208 static void
 209 add_vertex_data2(struct xorg_renderer *r,
 210                  float srcX, float srcY, float maskX, float maskY,
 211                  float dstX, float dstY, float width, float height,
 212                  struct pipe_resource *src,
 213                  struct pipe_resource *mask,
 214                  float *src_matrix, float *mask_matrix)
 215 {
 216    float src_s0, src_t0, src_s1, src_t1;
 217    float mask_s0, mask_t0, mask_s1, mask_t1;
 218    float spt0[2], spt1[2];
 219    float mpt0[2], mpt1[2];
 220
 221    spt0[0] = srcX;
 222    spt0[1] = srcY;
 223    spt1[0] = srcX + width;
 224    spt1[1] = srcY + height;
 225
 226    mpt0[0] = maskX;
 227    mpt0[1] = maskY;
 228    mpt1[0] = maskX + width;
 229    mpt1[1] = maskY + height;
 230
 231    if (src_matrix) {
 232       map_point(src_matrix, spt0[0], spt0[1], &spt0[0], &spt0[1]);
 233       map_point(src_matrix, spt1[0], spt1[1], &spt1[0], &spt1[1]);
 234    }
 235
 236    if (mask_matrix) {
 237       map_point(mask_matrix, mpt0[0], mpt0[1], &mpt0[0], &mpt0[1]);
 238       map_point(mask_matrix, mpt1[0], mpt1[1], &mpt1[0], &mpt1[1]);
 239    }
 240
 241    src_s0 = spt0[0] / src->width0;
 242    src_t0 = spt0[1] / src->height0;
 243    src_s1 = spt1[0] / src->width0;
 244    src_t1 = spt1[1] / src->height0;
 245
 246    mask_s0 = mpt0[0] / mask->width0;
 247    mask_t0 = mpt0[1] / mask->height0;
 248    mask_s1 = mpt1[0] / mask->width0;
 249    mask_t1 = mpt1[1] / mask->height0;
 250
 251    /* 1st vertex */
 252    add_vertex_2tex(r, dstX, dstY,
 253                    src_s0, src_t0, mask_s0, mask_t0);
 254    /* 2nd vertex */
 255    add_vertex_2tex(r, dstX + width, dstY,
 256                    src_s1, src_t0, mask_s1, mask_t0);
 257    /* 3rd vertex */
 258    add_vertex_2tex(r, dstX + width, dstY + height,
 259                    src_s1, src_t1, mask_s1, mask_t1);
 260    /* 4th vertex */
 261    add_vertex_2tex(r, dstX, dstY + height,
 262                    src_s0, src_t1, mask_s0, mask_t1);
 263 }
 264
 265 static void
 266 setup_vertex_data_yuv(struct xorg_renderer *r,
 267                       float srcX, float srcY, float srcW, float srcH,
 268                       float dstX, float dstY, float dstW, float dstH,
 269                       struct pipe_resource **tex)
 270 {
 271    float s0, t0, s1, t1;
 272    float spt0[2], spt1[2];
 273
 274    spt0[0] = srcX;
 275    spt0[1] = srcY;
 276    spt1[0] = srcX + srcW;
 277    spt1[1] = srcY + srcH;
 278
 279    s0 = spt0[0] / tex[0]->width0;
 280    t0 = spt0[1] / tex[0]->height0;
 281    s1 = spt1[0] / tex[0]->width0;
 282    t1 = spt1[1] / tex[0]->height0;
 283
 284    /* 1st vertex */
 285    add_vertex_1tex(r, dstX, dstY, s0, t0);
 286    /* 2nd vertex */
 287    add_vertex_1tex(r, dstX + dstW, dstY,
 288                    s1, t0);
 289    /* 3rd vertex */
 290    add_vertex_1tex(r, dstX + dstW, dstY + dstH,
 291                    s1, t1);
 292    /* 4th vertex */
 293    add_vertex_1tex(r, dstX, dstY + dstH,
 294                    s0, t1);
 295 }
 296
 297
 298
 299 /* Set up framebuffer, viewport and vertex shader constant buffer
 300  * state for a particular destinaton surface.  In all our rendering,
 301  * these concepts are linked.
 302  */
 303 void renderer_bind_destination(struct xorg_renderer *r,
 304                                struct pipe_surface *surface,
 305                                int width,
 306                                int height )
 307 {
 308
 309    struct pipe_framebuffer_state fb;
 310    struct pipe_viewport_state viewport;
 311
 312    /* Framebuffer uses actual surface width/height
 313     */
 314    memset(&fb, 0, sizeof fb);
 315    fb.width  = surface->width;
 316    fb.height = surface->height;
 317    fb.nr_cbufs = 1;
 318    fb.cbufs[0] = surface;
 319    fb.zsbuf = 0;
 320
 321    /* Viewport just touches the bit we're interested in:
 322     */
 323    viewport.scale[0] =  width / 2.f;
 324    viewport.scale[1] =  height / 2.f;
 325    viewport.scale[2] =  1.0;
 326    viewport.scale[3] =  1.0;
 327    viewport.translate[0] = width / 2.f;
 328    viewport.translate[1] = height / 2.f;
 329    viewport.translate[2] = 0.0;
 330    viewport.translate[3] = 0.0;
 331
 332    /* Constant buffer set up to match viewport dimensions:
 333     */
 334    if (r->fb_width != width ||
 335        r->fb_height != height)
 336    {
 337       float vs_consts[8] = {
 338          2.f/width, 2.f/height, 1, 1,
 339          -1, -1, 0, 0
 340       };
 341
 342       r->fb_width = width;
 343       r->fb_height = height;
 344
 345       renderer_set_constants(r, PIPE_SHADER_VERTEX,
 346                              vs_consts, sizeof vs_consts);
 347    }
 348
 349    cso_set_framebuffer(r->cso, &fb);
 350    cso_set_viewport(r->cso, &viewport);
 351 }
 352
 353
 354 struct xorg_renderer * renderer_create(struct pipe_context *pipe)
 355 {
 356    struct xorg_renderer *renderer = CALLOC_STRUCT(xorg_renderer);
 357
 358    renderer->pipe = pipe;
 359    renderer->cso = cso_create_context(pipe);
 360    renderer->shaders = xorg_shaders_create(renderer);
 361
 362    renderer_init_state(renderer);
 363
 364    return renderer;
 365 }
 366
 367 void renderer_destroy(struct xorg_renderer *r)
 368 {
 369    struct pipe_resource **vsbuf = &r->vs_const_buffer;
 370    struct pipe_resource **fsbuf = &r->fs_const_buffer;
 371
 372    if (*vsbuf)
 373       pipe_resource_reference(vsbuf, NULL);
 374
 375    if (*fsbuf)
 376       pipe_resource_reference(fsbuf, NULL);
 377
 378    if (r->shaders) {
 379       xorg_shaders_destroy(r->shaders);
 380       r->shaders = NULL;
 381    }
 382
 383    if (r->cso) {
 384       cso_release_all(r->cso);
 385       cso_destroy_context(r->cso);
 386       r->cso = NULL;
 387    }
 388 }
 389
 390
 391
 392
 393
 394 void renderer_set_constants(struct xorg_renderer *r,
 395                             int shader_type,
 396                             const float *params,
 397                             int param_bytes)
 398 {
 399    struct pipe_resource **cbuf =
 400       (shader_type == PIPE_SHADER_VERTEX) ? &r->vs_const_buffer :
 401       &r->fs_const_buffer;
 402
 403    pipe_resource_reference(cbuf, NULL);
 404    *cbuf = pipe_buffer_create(r->pipe->screen,
 405                               PIPE_BIND_CONSTANT_BUFFER,
 406                               PIPE_USAGE_STATIC,
 407                               param_bytes);
 408
 409    if (*cbuf) {
 410       pipe_buffer_write(r->pipe, *cbuf,
 411                         0, param_bytes, params);
 412    }
 413    pipe_set_constant_buffer(r->pipe, shader_type, 0, *cbuf);
 414 }
 415
 416
 417
 418 void renderer_draw_yuv(struct xorg_renderer *r,
 419                        float src_x, float src_y, float src_w, float src_h,
 420                        int dst_x, int dst_y, int dst_w, int dst_h,
 421                        struct pipe_resource **textures)
 422 {
 423    const int num_attribs = 2; /*pos + tex coord*/
 424
 425    setup_vertex_data_yuv(r,
 426                          src_x, src_y, src_w, src_h,
 427                          dst_x, dst_y, dst_w, dst_h,
 428                          textures);
 429
 430    cso_set_vertex_elements(r->cso, num_attribs, r->velems);
 431
 432    util_draw_user_vertex_buffer(r->cso, r->buffer,
 433                                 PIPE_PRIM_QUADS,
 434                                 4,  /* verts */
 435                                 num_attribs); /* attribs/vert */
 436
 437    r->buffer_size = 0;
 438 }
 439
 440 void renderer_begin_solid(struct xorg_renderer *r)
 441 {
 442    r->buffer_size = 0;
 443    r->attrs_per_vertex = 2;
 444 }
 445
 446 void renderer_solid(struct xorg_renderer *r,
 447                     int x0, int y0,
 448                     int x1, int y1,
 449                     float *color)
 450 {
 451    /*
 452    debug_printf("solid rect[(%d, %d), (%d, %d)], rgba[%f, %f, %f, %f]\n",
 453    x0, y0, x1, y1, color[0], color[1], color[2], color[3]);*/
 454
 455    renderer_draw_conditional(r, 4 * 8);
 456
 457    /* 1st vertex */
 458    add_vertex_color(r, x0, y0, color);
 459    /* 2nd vertex */
 460    add_vertex_color(r, x1, y0, color);
 461    /* 3rd vertex */
 462    add_vertex_color(r, x1, y1, color);
 463    /* 4th vertex */
 464    add_vertex_color(r, x0, y1, color);
 465 }
 466
 467 void renderer_draw_flush(struct xorg_renderer *r)
 468 {
 469    renderer_draw_conditional(r, 0);
 470 }
 471
 472 void renderer_begin_textures(struct xorg_renderer *r,
 473                              int num_textures)
 474 {
 475    r->attrs_per_vertex = 1 + num_textures;
 476    r->buffer_size = 0;
 477 }
 478
 479 void renderer_texture(struct xorg_renderer *r,
 480                       int *pos,
 481                       int width, int height,
 482                       struct pipe_sampler_view **sampler_view,
 483                       int num_textures,
 484                       float *src_matrix,
 485                       float *mask_matrix)
 486 {
 487
 488 #if 0
 489    if (src_matrix) {
 490       debug_printf("src_matrix = \n");
 491       debug_printf("%f, %f, %f\n", src_matrix[0], src_matrix[1], src_matrix[2]);
 492       debug_printf("%f, %f, %f\n", src_matrix[3], src_matrix[4], src_matrix[5]);
 493       debug_printf("%f, %f, %f\n", src_matrix[6], src_matrix[7], src_matrix[8]);
 494    }
 495    if (mask_matrix) {
 496       debug_printf("mask_matrix = \n");
 497       debug_printf("%f, %f, %f\n", mask_matrix[0], mask_matrix[1], mask_matrix[2]);
 498       debug_printf("%f, %f, %f\n", mask_matrix[3], mask_matrix[4], mask_matrix[5]);
 499       debug_printf("%f, %f, %f\n", mask_matrix[6], mask_matrix[7], mask_matrix[8]);
 500    }
 501 #endif
 502
 503    switch(r->attrs_per_vertex) {
 504    case 2:
 505       renderer_draw_conditional(r, 4 * 8);
 506       add_vertex_data1(r,
 507                        pos[0], pos[1], /* src */
 508                        pos[4], pos[5], /* dst */
 509                        width, height,
 510                        sampler_view[0]->texture, src_matrix);
 511       break;
 512    case 3:
 513       renderer_draw_conditional(r, 4 * 12);
 514       add_vertex_data2(r,
 515                        pos[0], pos[1], /* src */
 516                        pos[2], pos[3], /* mask */
 517                        pos[4], pos[5], /* dst */
 518                        width, height,
 519                        sampler_view[0]->texture, sampler_view[1]->texture,
 520                        src_matrix, mask_matrix);
 521       break;
 522    default:
 523       debug_assert(!"Unsupported number of textures");
 524       break;
 525    }
 526 }