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 struct pipe_resource *
  46 renderer_buffer_create(struct xorg_renderer *r)
  47 {
  48    struct pipe_resource *buf =
  49       pipe_user_buffer_create(r->pipe->screen,
  50                               r->buffer,
  51                               sizeof(float)*
  52                               r->buffer_size,
  53 /* XXX was: PIPE_BUFFER_USAGE_PIXEL/PIPE_BUFFER_USAGE_GPU_WRITE even though this is a vertex buffer??? */
  54                               PIPE_BIND_VERTEX_BUFFER);
  55    r->buffer_size = 0;
  56
  57    return buf;
  58 }
  59
  60 static INLINE void
  61 renderer_draw(struct xorg_renderer *r)
  62 {
  63    struct pipe_context *pipe = r->pipe;
  64    struct pipe_resource *buf = 0;
  65    int num_verts = r->buffer_size/(r->attrs_per_vertex * NUM_COMPONENTS);
  66
  67    if (!r->buffer_size)
  68       return;
  69
  70    buf = renderer_buffer_create(r);
  71
  72
  73    if (buf) {
  74       cso_set_vertex_elements(r->cso, r->attrs_per_vertex, r->velems);
  75
  76       util_draw_vertex_buffer(pipe, r->cso, buf, 0,
  77                               PIPE_PRIM_QUADS,
  78                               num_verts,  /* verts */
  79                               r->attrs_per_vertex); /* attribs/vert */
  80
  81       pipe_resource_reference(&buf, NULL);
  82    }
  83 }
  84
  85 static INLINE void
  86 renderer_draw_conditional(struct xorg_renderer *r,
  87                           int next_batch)
  88 {
  89    if (r->buffer_size + next_batch >= BUF_SIZE ||
  90        (next_batch == 0 && r->buffer_size)) {
  91       renderer_draw(r);
  92    }
  93 }
  94
  95 static void
  96 renderer_init_state(struct xorg_renderer *r)
  97 {
  98    struct pipe_depth_stencil_alpha_state dsa;
  99    struct pipe_rasterizer_state raster;
 100    unsigned i;
 101
 102    /* set common initial clip state */
 103    memset(&dsa, 0, sizeof(struct pipe_depth_stencil_alpha_state));
 104    cso_set_depth_stencil_alpha(r->cso, &dsa);
 105
 106
 107    /* XXX: move to renderer_init_state? */
 108    memset(&raster, 0, sizeof(struct pipe_rasterizer_state));
 109    raster.gl_rasterization_rules = 1;
 110    raster.depth_clip = 1;
 111    cso_set_rasterizer(r->cso, &raster);
 112
 113    /* vertex elements state */
 114    memset(&r->velems[0], 0, sizeof(r->velems[0]) * 3);
 115    for (i = 0; i < 3; i++) {
 116       r->velems[i].src_offset = i * 4 * sizeof(float);
 117       r->velems[i].instance_divisor = 0;
 118       r->velems[i].vertex_buffer_index = 0;
 119       r->velems[i].src_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
 120    }
 121 }
 122
 123
 124 static INLINE void
 125 add_vertex_color(struct xorg_renderer *r,
 126                  float x, float y,
 127                  float color[4])
 128 {
 129    float *vertex = r->buffer + r->buffer_size;
 130
 131    vertex[0] = x;
 132    vertex[1] = y;
 133    vertex[2] = 0.f; /*z*/
 134    vertex[3] = 1.f; /*w*/
 135
 136    vertex[4] = color[0]; /*r*/
 137    vertex[5] = color[1]; /*g*/
 138    vertex[6] = color[2]; /*b*/
 139    vertex[7] = color[3]; /*a*/
 140
 141    r->buffer_size += 8;
 142 }
 143
 144 static INLINE void
 145 add_vertex_1tex(struct xorg_renderer *r,
 146                 float x, float y, float s, float t)
 147 {
 148    float *vertex = r->buffer + r->buffer_size;
 149
 150    vertex[0] = x;
 151    vertex[1] = y;
 152    vertex[2] = 0.f; /*z*/
 153    vertex[3] = 1.f; /*w*/
 154
 155    vertex[4] = s;   /*s*/
 156    vertex[5] = t;   /*t*/
 157    vertex[6] = 0.f; /*r*/
 158    vertex[7] = 1.f; /*q*/
 159
 160    r->buffer_size += 8;
 161 }
 162
 163 static void
 164 add_vertex_data1(struct xorg_renderer *r,
 165                  float srcX, float srcY,  float dstX, float dstY,
 166                  float width, float height,
 167                  struct pipe_resource *src, float *src_matrix)
 168 {
 169    float s0, t0, s1, t1, s2, t2, s3, t3;
 170    float pt0[2], pt1[2], pt2[2], pt3[2];
 171
 172    pt0[0] = srcX;
 173    pt0[1] = srcY;
 174    pt1[0] = (srcX + width);
 175    pt1[1] = srcY;
 176    pt2[0] = (srcX + width);
 177    pt2[1] = (srcY + height);
 178    pt3[0] = srcX;
 179    pt3[1] = (srcY + height);
 180
 181    if (src_matrix) {
 182       map_point(src_matrix, pt0[0], pt0[1], &pt0[0], &pt0[1]);
 183       map_point(src_matrix, pt1[0], pt1[1], &pt1[0], &pt1[1]);
 184       map_point(src_matrix, pt2[0], pt2[1], &pt2[0], &pt2[1]);
 185       map_point(src_matrix, pt3[0], pt3[1], &pt3[0], &pt3[1]);
 186    }
 187
 188    s0 =  pt0[0] / src->width0;
 189    s1 =  pt1[0] / src->width0;
 190    s2 =  pt2[0] / src->width0;
 191    s3 =  pt3[0] / src->width0;
 192    t0 =  pt0[1] / src->height0;
 193    t1 =  pt1[1] / src->height0;
 194    t2 =  pt2[1] / src->height0;
 195    t3 =  pt3[1] / src->height0;
 196
 197    /* 1st vertex */
 198    add_vertex_1tex(r, dstX, dstY, s0, t0);
 199    /* 2nd vertex */
 200    add_vertex_1tex(r, dstX + width, dstY, s1, t1);
 201    /* 3rd vertex */
 202    add_vertex_1tex(r, dstX + width, dstY + height, s2, t2);
 203    /* 4th vertex */
 204    add_vertex_1tex(r, dstX, dstY + height, s3, t3);
 205 }
 206
 207
 208 static INLINE void
 209 add_vertex_2tex(struct xorg_renderer *r,
 210                 float x, float y,
 211                 float s0, float t0, float s1, float t1)
 212 {
 213    float *vertex = r->buffer + r->buffer_size;
 214
 215    vertex[0] = x;
 216    vertex[1] = y;
 217    vertex[2] = 0.f; /*z*/
 218    vertex[3] = 1.f; /*w*/
 219
 220    vertex[4] = s0;  /*s*/
 221    vertex[5] = t0;  /*t*/
 222    vertex[6] = 0.f; /*r*/
 223    vertex[7] = 1.f; /*q*/
 224
 225    vertex[8] = s1;  /*s*/
 226    vertex[9] = t1;  /*t*/
 227    vertex[10] = 0.f; /*r*/
 228    vertex[11] = 1.f; /*q*/
 229
 230    r->buffer_size += 12;
 231 }
 232
 233 static void
 234 add_vertex_data2(struct xorg_renderer *r,
 235                  float srcX, float srcY, float maskX, float maskY,
 236                  float dstX, float dstY, float width, float height,
 237                  struct pipe_resource *src,
 238                  struct pipe_resource *mask,
 239                  float *src_matrix, float *mask_matrix)
 240 {
 241    float src_s0, src_t0, src_s1, src_t1;
 242    float mask_s0, mask_t0, mask_s1, mask_t1;
 243    float spt0[2], spt1[2];
 244    float mpt0[2], mpt1[2];
 245
 246    spt0[0] = srcX;
 247    spt0[1] = srcY;
 248    spt1[0] = srcX + width;
 249    spt1[1] = srcY + height;
 250
 251    mpt0[0] = maskX;
 252    mpt0[1] = maskY;
 253    mpt1[0] = maskX + width;
 254    mpt1[1] = maskY + height;
 255
 256    if (src_matrix) {
 257       map_point(src_matrix, spt0[0], spt0[1], &spt0[0], &spt0[1]);
 258       map_point(src_matrix, spt1[0], spt1[1], &spt1[0], &spt1[1]);
 259    }
 260
 261    if (mask_matrix) {
 262       map_point(mask_matrix, mpt0[0], mpt0[1], &mpt0[0], &mpt0[1]);
 263       map_point(mask_matrix, mpt1[0], mpt1[1], &mpt1[0], &mpt1[1]);
 264    }
 265
 266    src_s0 = spt0[0] / src->width0;
 267    src_t0 = spt0[1] / src->height0;
 268    src_s1 = spt1[0] / src->width0;
 269    src_t1 = spt1[1] / src->height0;
 270
 271    mask_s0 = mpt0[0] / mask->width0;
 272    mask_t0 = mpt0[1] / mask->height0;
 273    mask_s1 = mpt1[0] / mask->width0;
 274    mask_t1 = mpt1[1] / mask->height0;
 275
 276    /* 1st vertex */
 277    add_vertex_2tex(r, dstX, dstY,
 278                    src_s0, src_t0, mask_s0, mask_t0);
 279    /* 2nd vertex */
 280    add_vertex_2tex(r, dstX + width, dstY,
 281                    src_s1, src_t0, mask_s1, mask_t0);
 282    /* 3rd vertex */
 283    add_vertex_2tex(r, dstX + width, dstY + height,
 284                    src_s1, src_t1, mask_s1, mask_t1);
 285    /* 4th vertex */
 286    add_vertex_2tex(r, dstX, dstY + height,
 287                    src_s0, src_t1, mask_s0, mask_t1);
 288 }
 289
 290 static struct pipe_resource *
 291 setup_vertex_data_yuv(struct xorg_renderer *r,
 292                       float srcX, float srcY, float srcW, float srcH,
 293                       float dstX, float dstY, float dstW, float dstH,
 294                       struct pipe_resource **tex)
 295 {
 296    float s0, t0, s1, t1;
 297    float spt0[2], spt1[2];
 298
 299    spt0[0] = srcX;
 300    spt0[1] = srcY;
 301    spt1[0] = srcX + srcW;
 302    spt1[1] = srcY + srcH;
 303
 304    s0 = spt0[0] / tex[0]->width0;
 305    t0 = spt0[1] / tex[0]->height0;
 306    s1 = spt1[0] / tex[0]->width0;
 307    t1 = spt1[1] / tex[0]->height0;
 308
 309    /* 1st vertex */
 310    add_vertex_1tex(r, dstX, dstY, s0, t0);
 311    /* 2nd vertex */
 312    add_vertex_1tex(r, dstX + dstW, dstY,
 313                    s1, t0);
 314    /* 3rd vertex */
 315    add_vertex_1tex(r, dstX + dstW, dstY + dstH,
 316                    s1, t1);
 317    /* 4th vertex */
 318    add_vertex_1tex(r, dstX, dstY + dstH,
 319                    s0, t1);
 320
 321    return renderer_buffer_create(r);
 322 }
 323
 324
 325
 326 /* Set up framebuffer, viewport and vertex shader constant buffer
 327  * state for a particular destinaton surface.  In all our rendering,
 328  * these concepts are linked.
 329  */
 330 void renderer_bind_destination(struct xorg_renderer *r,
 331                                struct pipe_surface *surface,
 332                                int width,
 333                                int height )
 334 {
 335
 336    struct pipe_framebuffer_state fb;
 337    struct pipe_viewport_state viewport;
 338
 339    /* Framebuffer uses actual surface width/height
 340     */
 341    memset(&fb, 0, sizeof fb);
 342    fb.width  = surface->width;
 343    fb.height = surface->height;
 344    fb.nr_cbufs = 1;
 345    fb.cbufs[0] = surface;
 346    fb.zsbuf = 0;
 347
 348    /* Viewport just touches the bit we're interested in:
 349     */
 350    viewport.scale[0] =  width / 2.f;
 351    viewport.scale[1] =  height / 2.f;
 352    viewport.scale[2] =  1.0;
 353    viewport.scale[3] =  1.0;
 354    viewport.translate[0] = width / 2.f;
 355    viewport.translate[1] = height / 2.f;
 356    viewport.translate[2] = 0.0;
 357    viewport.translate[3] = 0.0;
 358
 359    /* Constant buffer set up to match viewport dimensions:
 360     */
 361    if (r->fb_width != width ||
 362        r->fb_height != height)
 363    {
 364       float vs_consts[8] = {
 365          2.f/width, 2.f/height, 1, 1,
 366          -1, -1, 0, 0
 367       };
 368
 369       r->fb_width = width;
 370       r->fb_height = height;
 371
 372       renderer_set_constants(r, PIPE_SHADER_VERTEX,
 373                              vs_consts, sizeof vs_consts);
 374    }
 375
 376    cso_set_framebuffer(r->cso, &fb);
 377    cso_set_viewport(r->cso, &viewport);
 378 }
 379
 380
 381 struct xorg_renderer * renderer_create(struct pipe_context *pipe)
 382 {
 383    struct xorg_renderer *renderer = CALLOC_STRUCT(xorg_renderer);
 384
 385    renderer->pipe = pipe;
 386    renderer->cso = cso_create_context(pipe);
 387    renderer->shaders = xorg_shaders_create(renderer);
 388
 389    renderer_init_state(renderer);
 390
 391    return renderer;
 392 }
 393
 394 void renderer_destroy(struct xorg_renderer *r)
 395 {
 396    struct pipe_resource **vsbuf = &r->vs_const_buffer;
 397    struct pipe_resource **fsbuf = &r->fs_const_buffer;
 398
 399    if (*vsbuf)
 400       pipe_resource_reference(vsbuf, NULL);
 401
 402    if (*fsbuf)
 403       pipe_resource_reference(fsbuf, NULL);
 404
 405    if (r->shaders) {
 406       xorg_shaders_destroy(r->shaders);
 407       r->shaders = NULL;
 408    }
 409
 410    if (r->cso) {
 411       cso_release_all(r->cso);
 412       cso_destroy_context(r->cso);
 413       r->cso = NULL;
 414    }
 415 }
 416
 417
 418
 419
 420
 421 void renderer_set_constants(struct xorg_renderer *r,
 422                             int shader_type,
 423                             const float *params,
 424                             int param_bytes)
 425 {
 426    struct pipe_resource **cbuf =
 427       (shader_type == PIPE_SHADER_VERTEX) ? &r->vs_const_buffer :
 428       &r->fs_const_buffer;
 429
 430    pipe_resource_reference(cbuf, NULL);
 431    *cbuf = pipe_buffer_create(r->pipe->screen,
 432                               PIPE_BIND_CONSTANT_BUFFER,
 433                               PIPE_USAGE_STATIC,
 434                               param_bytes);
 435
 436    if (*cbuf) {
 437       pipe_buffer_write(r->pipe, *cbuf,
 438                         0, param_bytes, params);
 439    }
 440    pipe_set_constant_buffer(r->pipe, shader_type, 0, *cbuf);
 441 }
 442
 443
 444 void renderer_copy_prepare(struct xorg_renderer *r,
 445                            struct pipe_surface *dst_surface,
 446                            struct pipe_resource *src_texture)
 447 {
 448    struct pipe_context *pipe = r->pipe;
 449    struct pipe_screen *screen = pipe->screen;
 450    struct xorg_shader shader;
 451
 452    assert(screen->is_format_supported(screen, dst_surface->format,
 453                                       PIPE_TEXTURE_2D, 0,
 454                                       PIPE_BIND_RENDER_TARGET));
 455    (void) screen;
 456
 457
 458    /* set misc state we care about */
 459    {
 460       struct pipe_blend_state blend;
 461       memset(&blend, 0, sizeof(blend));
 462       blend.rt[0].rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 463       blend.rt[0].alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 464       blend.rt[0].rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 465       blend.rt[0].alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 466       blend.rt[0].colormask = PIPE_MASK_RGBA;
 467       cso_set_blend(r->cso, &blend);
 468    }
 469
 470    /* sampler */
 471    {
 472       struct pipe_sampler_state sampler;
 473       memset(&sampler, 0, sizeof(sampler));
 474       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 475       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 476       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 477       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 478       sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 479       sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 480       sampler.normalized_coords = 1;
 481       cso_single_sampler(r->cso, 0, &sampler);
 482       cso_single_sampler_done(r->cso);
 483    }
 484
 485    renderer_bind_destination(r, dst_surface,
 486                              dst_surface->width,
 487                              dst_surface->height);
 488
 489    /* texture/sampler view */
 490    {
 491       struct pipe_sampler_view templ;
 492       struct pipe_sampler_view *src_view;
 493       u_sampler_view_default_template(&templ,
 494                                       src_texture,
 495                                       src_texture->format);
 496       src_view = pipe->create_sampler_view(pipe, src_texture, &templ);
 497       cso_set_fragment_sampler_views(r->cso, 1, &src_view);
 498       pipe_sampler_view_reference(&src_view, NULL);
 499    }
 500
 501    /* shaders */
 502    shader = xorg_shaders_get(r->shaders,
 503                              VS_COMPOSITE,
 504                              FS_COMPOSITE);
 505    cso_set_vertex_shader_handle(r->cso, shader.vs);
 506    cso_set_fragment_shader_handle(r->cso, shader.fs);
 507
 508    r->buffer_size = 0;
 509    r->attrs_per_vertex = 2;
 510 }
 511
 512 struct pipe_resource *
 513 renderer_clone_texture(struct xorg_renderer *r,
 514                        struct pipe_resource *src)
 515 {
 516    enum pipe_format format;
 517    struct pipe_context *pipe = r->pipe;
 518    struct pipe_screen *screen = pipe->screen;
 519    struct pipe_resource *pt;
 520    struct pipe_resource templ;
 521
 522    /* the coming in texture should already have that invariance */
 523    debug_assert(screen->is_format_supported(screen, src->format,
 524                                             PIPE_TEXTURE_2D, 0,
 525                                             PIPE_BIND_SAMPLER_VIEW));
 526
 527    format = src->format;
 528
 529    memset(&templ, 0, sizeof(templ));
 530    templ.target = PIPE_TEXTURE_2D;
 531    templ.format = format;
 532    templ.last_level = 0;
 533    templ.width0 = src->width0;
 534    templ.height0 = src->height0;
 535    templ.depth0 = 1;
 536    templ.array_size = 1;
 537    templ.bind = PIPE_BIND_SAMPLER_VIEW;
 538
 539    pt = screen->resource_create(screen, &templ);
 540
 541    debug_assert(!pt || pipe_is_referenced(&pt->reference));
 542
 543    if (!pt)
 544       return NULL;
 545
 546    {
 547       /* copy source framebuffer surface into texture */
 548       struct pipe_box src_box;
 549       u_box_origin_2d(src->width0, src->height0, &src_box);
 550
 551       pipe->resource_copy_region(pipe,
 552                                  pt, /* dest */
 553                                  0, /* dest_level */
 554                                  0, 0, 0, /* destx/y/z */
 555                                  src,
 556                                  0, &src_box);
 557    }
 558
 559    return pt;
 560 }
 561
 562
 563 void renderer_copy_pixmap(struct xorg_renderer *r,
 564                           int dx, int dy,
 565                           int sx, int sy,
 566                           int width, int height,
 567                           float src_width,
 568                           float src_height)
 569 {
 570    float s0, t0, s1, t1;
 571    float x0, y0, x1, y1;
 572
 573
 574    /* XXX: could put the texcoord scaling calculation into the vertex
 575     * shader.
 576     */
 577    s0 = sx            / src_width;
 578    s1 = (sx + width)  / src_width;
 579    t0 = sy            / src_height;
 580    t1 = (sy + height) / src_height;
 581
 582    x0 = dx;
 583    x1 = dx + width;
 584    y0 = dy;
 585    y1 = dy + height;
 586
 587    /* draw quad */
 588    renderer_draw_conditional(r, 4*8);
 589    add_vertex_1tex(r, x0, y0, s0, t0);
 590    add_vertex_1tex(r, x1, y0, s1, t0);
 591    add_vertex_1tex(r, x1, y1, s1, t1);
 592    add_vertex_1tex(r, x0, y1, s0, t1);
 593 }
 594
 595
 596
 597
 598 void renderer_draw_yuv(struct xorg_renderer *r,
 599                        float src_x, float src_y, float src_w, float src_h,
 600                        int dst_x, int dst_y, int dst_w, int dst_h,
 601                        struct pipe_resource **textures)
 602 {
 603    struct pipe_context *pipe = r->pipe;
 604    struct pipe_resource *buf = 0;
 605
 606    buf = setup_vertex_data_yuv(r,
 607                                src_x, src_y, src_w, src_h,
 608                                dst_x, dst_y, dst_w, dst_h,
 609                                textures);
 610
 611    if (buf) {
 612       const int num_attribs = 2; /*pos + tex coord*/
 613
 614       cso_set_vertex_elements(r->cso, num_attribs, r->velems);
 615
 616       util_draw_vertex_buffer(pipe, r->cso, buf, 0,
 617                               PIPE_PRIM_QUADS,
 618                               4,  /* verts */
 619                               num_attribs); /* attribs/vert */
 620
 621       pipe_resource_reference(&buf, NULL);
 622    }
 623 }
 624
 625 void renderer_begin_solid(struct xorg_renderer *r)
 626 {
 627    r->buffer_size = 0;
 628    r->attrs_per_vertex = 2;
 629 }
 630
 631 void renderer_solid(struct xorg_renderer *r,
 632                     int x0, int y0,
 633                     int x1, int y1,
 634                     float *color)
 635 {
 636    /*
 637    debug_printf("solid rect[(%d, %d), (%d, %d)], rgba[%f, %f, %f, %f]\n",
 638    x0, y0, x1, y1, color[0], color[1], color[2], color[3]);*/
 639
 640    renderer_draw_conditional(r, 4 * 8);
 641
 642    /* 1st vertex */
 643    add_vertex_color(r, x0, y0, color);
 644    /* 2nd vertex */
 645    add_vertex_color(r, x1, y0, color);
 646    /* 3rd vertex */
 647    add_vertex_color(r, x1, y1, color);
 648    /* 4th vertex */
 649    add_vertex_color(r, x0, y1, color);
 650 }
 651
 652 void renderer_draw_flush(struct xorg_renderer *r)
 653 {
 654    renderer_draw_conditional(r, 0);
 655 }
 656
 657 void renderer_begin_textures(struct xorg_renderer *r,
 658                              int num_textures)
 659 {
 660    r->attrs_per_vertex = 1 + num_textures;
 661    r->buffer_size = 0;
 662 }
 663
 664 void renderer_texture(struct xorg_renderer *r,
 665                       int *pos,
 666                       int width, int height,
 667                       struct pipe_sampler_view **sampler_view,
 668                       int num_textures,
 669                       float *src_matrix,
 670                       float *mask_matrix)
 671 {
 672
 673 #if 0
 674    if (src_matrix) {
 675       debug_printf("src_matrix = \n");
 676       debug_printf("%f, %f, %f\n", src_matrix[0], src_matrix[1], src_matrix[2]);
 677       debug_printf("%f, %f, %f\n", src_matrix[3], src_matrix[4], src_matrix[5]);
 678       debug_printf("%f, %f, %f\n", src_matrix[6], src_matrix[7], src_matrix[8]);
 679    }
 680    if (mask_matrix) {
 681       debug_printf("mask_matrix = \n");
 682       debug_printf("%f, %f, %f\n", mask_matrix[0], mask_matrix[1], mask_matrix[2]);
 683       debug_printf("%f, %f, %f\n", mask_matrix[3], mask_matrix[4], mask_matrix[5]);
 684       debug_printf("%f, %f, %f\n", mask_matrix[6], mask_matrix[7], mask_matrix[8]);
 685    }
 686 #endif
 687
 688    switch(r->attrs_per_vertex) {
 689    case 2:
 690       renderer_draw_conditional(r, 4 * 8);
 691       add_vertex_data1(r,
 692                        pos[0], pos[1], /* src */
 693                        pos[4], pos[5], /* dst */
 694                        width, height,
 695                        sampler_view[0]->texture, src_matrix);
 696       break;
 697    case 3:
 698       renderer_draw_conditional(r, 4 * 12);
 699       add_vertex_data2(r,
 700                        pos[0], pos[1], /* src */
 701                        pos[2], pos[3], /* mask */
 702                        pos[4], pos[5], /* dst */
 703                        width, height,
 704                        sampler_view[0]->texture, sampler_view[1]->texture,
 705                        src_matrix, mask_matrix);
 706       break;
 707    default:
 708       debug_assert(!"Unsupported number of textures");
 709       break;
 710    }
 711 }