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
  11 #include "pipe/p_inlines.h"
  12
  13 enum AxisOrientation {
  14    Y0_BOTTOM,
  15    Y0_TOP
  16 };
  17
  18 static void
  19 renderer_init_state(struct xorg_renderer *r)
  20 {
  21    struct pipe_depth_stencil_alpha_state dsa;
  22
  23    /* set common initial clip state */
  24    memset(&dsa, 0, sizeof(struct pipe_depth_stencil_alpha_state));
  25    cso_set_depth_stencil_alpha(r->cso, &dsa);
  26 }
  27
  28
  29 static INLINE void
  30 setup_vertex0(float vertex[2][4], float x, float y,
  31               float color[4])
  32 {
  33    vertex[0][0] = x;
  34    vertex[0][1] = y;
  35    vertex[0][2] = 0.f; /*z*/
  36    vertex[0][3] = 1.f; /*w*/
  37
  38    vertex[1][0] = color[0]; /*r*/
  39    vertex[1][1] = color[1]; /*g*/
  40    vertex[1][2] = color[2]; /*b*/
  41    vertex[1][3] = color[3]; /*a*/
  42 }
  43
  44 static INLINE void
  45 setup_vertex1(float vertex[2][4], float x, float y, float s, float t)
  46 {
  47    vertex[0][0] = x;
  48    vertex[0][1] = y;
  49    vertex[0][2] = 0.f; /*z*/
  50    vertex[0][3] = 1.f; /*w*/
  51
  52    vertex[1][0] = s;   /*s*/
  53    vertex[1][1] = t;   /*t*/
  54    vertex[1][2] = 0.f; /*r*/
  55    vertex[1][3] = 1.f; /*q*/
  56 }
  57
  58 static struct pipe_buffer *
  59 setup_vertex_data1(struct xorg_renderer *r,
  60                    int srcX, int srcY,  int dstX, int dstY,
  61                    int width, int height,
  62                    struct pipe_texture *src)
  63 {
  64    float s0, t0, s1, t1;
  65
  66    s0 = srcX / src->width[0];
  67    s1 = srcX + width / src->width[0];
  68    t0 = srcY / src->height[0];
  69    t1 = srcY + height / src->height[0];
  70
  71    /* 1st vertex */
  72    setup_vertex1(r->vertices2[0], dstX, dstY, s0, t0);
  73    /* 2nd vertex */
  74    setup_vertex1(r->vertices2[1], dstX + width, dstY, s1, t0);
  75    /* 3rd vertex */
  76    setup_vertex1(r->vertices2[2], dstX + width, dstY + height, s1, t1);
  77    /* 4th vertex */
  78    setup_vertex1(r->vertices2[3], dstX, dstY + height, s0, t1);
  79
  80    return pipe_user_buffer_create(r->pipe->screen,
  81                                   r->vertices2,
  82                                   sizeof(r->vertices2));
  83 }
  84
  85 static struct pipe_buffer *
  86 setup_vertex_data_tex(struct xorg_renderer *r,
  87                       float x0, float y0, float x1, float y1,
  88                       float s0, float t0, float s1, float t1,
  89                       float z)
  90 {
  91    /* 1st vertex */
  92    setup_vertex1(r->vertices2[0], x0, y0, s0, t0);
  93    /* 2nd vertex */
  94    setup_vertex1(r->vertices2[1], x1, y0, s1, t0);
  95    /* 3rd vertex */
  96    setup_vertex1(r->vertices2[2], x1, y1, s1, t1);
  97    /* 4th vertex */
  98    setup_vertex1(r->vertices2[3], x0, y1, s0, t1);
  99
 100    return pipe_user_buffer_create(r->pipe->screen,
 101                                   r->vertices2,
 102                                   sizeof(r->vertices2));
 103 }
 104
 105 static INLINE void
 106 setup_vertex2(float vertex[3][4], float x, float y,
 107               float s0, float t0, float s1, float t1)
 108 {
 109    vertex[0][0] = x;
 110    vertex[0][1] = y;
 111    vertex[0][2] = 0.f; /*z*/
 112    vertex[0][3] = 1.f; /*w*/
 113
 114    vertex[1][0] = s0;  /*s*/
 115    vertex[1][1] = t0;  /*t*/
 116    vertex[1][2] = 0.f; /*r*/
 117    vertex[1][3] = 1.f; /*q*/
 118
 119    vertex[2][0] = s1;  /*s*/
 120    vertex[2][1] = t1;  /*t*/
 121    vertex[2][2] = 0.f; /*r*/
 122    vertex[2][3] = 1.f; /*q*/
 123 }
 124
 125 static struct pipe_buffer *
 126 setup_vertex_data2(struct xorg_renderer *r,
 127                    int srcX, int srcY, int maskX, int maskY,
 128                    int dstX, int dstY, int width, int height,
 129                    struct pipe_texture *src,
 130                    struct pipe_texture *mask)
 131 {
 132    float st0[4], st1[4];
 133
 134    st0[0] = srcX / src->width[0];
 135    st0[1] = srcY / src->height[0];
 136    st0[2] = srcX + width / src->width[0];
 137    st0[3] = srcY + height / src->height[0];
 138
 139    st1[0] = maskX / mask->width[0];
 140    st1[1] = maskY / mask->height[0];
 141    st1[2] = maskX + width / mask->width[0];
 142    st1[3] = maskY + height / mask->height[0];
 143
 144    /* 1st vertex */
 145    setup_vertex2(r->vertices3[0], dstX, dstY,
 146                  st0[0], st0[1], st1[0], st1[1]);
 147    /* 2nd vertex */
 148    setup_vertex2(r->vertices3[1], dstX + width, dstY,
 149                  st0[2], st0[1], st1[2], st1[1]);
 150    /* 3rd vertex */
 151    setup_vertex2(r->vertices3[2], dstX + width, dstY + height,
 152                  st0[2], st0[3], st1[2], st1[3]);
 153    /* 4th vertex */
 154    setup_vertex2(r->vertices3[3], dstX, dstY + height,
 155                  st0[0], st0[3], st1[0], st1[3]);
 156
 157    return pipe_user_buffer_create(r->pipe->screen,
 158                                   r->vertices3,
 159                                   sizeof(r->vertices3));
 160 }
 161
 162
 163
 164 static void
 165 set_viewport(struct xorg_renderer *r, int width, int height,
 166              enum AxisOrientation orientation)
 167 {
 168    struct pipe_viewport_state viewport;
 169    float y_scale = (orientation == Y0_BOTTOM) ? -2.f : 2.f;
 170
 171    viewport.scale[0] =  width / 2.f;
 172    viewport.scale[1] =  height / y_scale;
 173    viewport.scale[2] =  1.0;
 174    viewport.scale[3] =  1.0;
 175    viewport.translate[0] = width / 2.f;
 176    viewport.translate[1] = height / 2.f;
 177    viewport.translate[2] = 0.0;
 178    viewport.translate[3] = 0.0;
 179
 180    cso_set_viewport(r->cso, &viewport);
 181 }
 182
 183
 184
 185 struct xorg_renderer * renderer_create(struct pipe_context *pipe)
 186 {
 187    struct xorg_renderer *renderer = CALLOC_STRUCT(xorg_renderer);
 188
 189    renderer->pipe = pipe;
 190    renderer->cso = cso_create_context(pipe);
 191    renderer->shaders = xorg_shaders_create(renderer);
 192
 193    renderer_init_state(renderer);
 194
 195    return renderer;
 196 }
 197
 198 void renderer_destroy(struct xorg_renderer *r)
 199 {
 200    struct pipe_constant_buffer *vsbuf = &r->vs_const_buffer;
 201    struct pipe_constant_buffer *fsbuf = &r->fs_const_buffer;
 202
 203    if (vsbuf && vsbuf->buffer)
 204       pipe_buffer_reference(&vsbuf->buffer, NULL);
 205
 206    if (fsbuf && fsbuf->buffer)
 207       pipe_buffer_reference(&fsbuf->buffer, NULL);
 208
 209    if (r->cso) {
 210       cso_release_all(r->cso);
 211       cso_destroy_context(r->cso);
 212    }
 213
 214    if (r->shaders) {
 215       xorg_shaders_destroy(r->shaders);
 216    }
 217 }
 218
 219 void renderer_bind_framebuffer(struct xorg_renderer *r,
 220                                struct exa_pixmap_priv *priv)
 221 {
 222    unsigned i;
 223    struct pipe_framebuffer_state state;
 224    struct pipe_surface *surface = xorg_gpu_surface(r->pipe->screen, priv);
 225    memset(&state, 0, sizeof(struct pipe_framebuffer_state));
 226
 227    state.width  = priv->tex->width[0];
 228    state.height = priv->tex->height[0];
 229
 230    state.nr_cbufs = 1;
 231    state.cbufs[0] = surface;
 232    for (i = 1; i < PIPE_MAX_COLOR_BUFS; ++i)
 233       state.cbufs[i] = 0;
 234
 235    /* currently we don't use depth/stencil */
 236    state.zsbuf = 0;
 237
 238    cso_set_framebuffer(r->cso, &state);
 239
 240    /* we do fire and forget for the framebuffer, this is the forget part */
 241    pipe_surface_reference(&surface, NULL);
 242 }
 243
 244 void renderer_bind_viewport(struct xorg_renderer *r,
 245                             struct exa_pixmap_priv *dst)
 246 {
 247    int width = dst->tex->width[0];
 248    int height = dst->tex->height[0];
 249
 250    /*debug_printf("Bind viewport (%d, %d)\n", width, height);*/
 251
 252    set_viewport(r, width, height, Y0_TOP);
 253 }
 254
 255 void renderer_bind_rasterizer(struct xorg_renderer *r)
 256 {
 257    struct pipe_rasterizer_state raster;
 258
 259    /* XXX: move to renderer_init_state? */
 260    memset(&raster, 0, sizeof(struct pipe_rasterizer_state));
 261    raster.gl_rasterization_rules = 1;
 262    cso_set_rasterizer(r->cso, &raster);
 263 }
 264
 265 void renderer_set_constants(struct xorg_renderer *r,
 266                             int shader_type,
 267                             const float *params,
 268                             int param_bytes)
 269 {
 270    struct pipe_constant_buffer *cbuf =
 271       (shader_type == PIPE_SHADER_VERTEX) ? &r->vs_const_buffer :
 272       &r->fs_const_buffer;
 273
 274    pipe_buffer_reference(&cbuf->buffer, NULL);
 275    cbuf->buffer = pipe_buffer_create(r->pipe->screen, 16,
 276                                      PIPE_BUFFER_USAGE_CONSTANT,
 277                                      param_bytes);
 278
 279    if (cbuf->buffer) {
 280       pipe_buffer_write(r->pipe->screen, cbuf->buffer,
 281                         0, param_bytes, params);
 282    }
 283    r->pipe->set_constant_buffer(r->pipe, shader_type, 0, cbuf);
 284 }
 285
 286 static void
 287 setup_vs_constant_buffer(struct xorg_renderer *r,
 288                          int width, int height)
 289 {
 290    const int param_bytes = 8 * sizeof(float);
 291    float vs_consts[8] = {
 292       2.f/width, 2.f/height, 1, 1,
 293       -1, -1, 0, 0
 294    };
 295    renderer_set_constants(r, PIPE_SHADER_VERTEX,
 296                           vs_consts, param_bytes);
 297 }
 298
 299 static void
 300 setup_fs_constant_buffer(struct xorg_renderer *r)
 301 {
 302    const int param_bytes = 4 * sizeof(float);
 303    const float fs_consts[8] = {
 304       0, 0, 0, 1,
 305    };
 306    renderer_set_constants(r, PIPE_SHADER_FRAGMENT,
 307                           fs_consts, param_bytes);
 308 }
 309
 310 static INLINE void shift_rectx(float coords[4],
 311                                const float *bounds,
 312                                const float shift)
 313 {
 314    coords[0] += shift;
 315    coords[2] -= shift;
 316    if (bounds) {
 317       coords[2] = MIN2(coords[2], bounds[2]);
 318       /* bound x/y + width/height */
 319       if ((coords[0] + coords[2]) > (bounds[0] + bounds[2])) {
 320          coords[2] = (bounds[0] + bounds[2]) - coords[0];
 321       }
 322    }
 323 }
 324
 325 static INLINE void shift_recty(float coords[4],
 326                                const float *bounds,
 327                                const float shift)
 328 {
 329    coords[1] += shift;
 330    coords[3] -= shift;
 331    if (bounds) {
 332       coords[3] = MIN2(coords[3], bounds[3]);
 333       if ((coords[1] + coords[3]) > (bounds[1] + bounds[3])) {
 334          coords[3] = (bounds[1] + bounds[3]) - coords[1];
 335       }
 336    }
 337 }
 338
 339 static INLINE void bound_rect(float coords[4],
 340                               const float bounds[4],
 341                               float shift[4])
 342 {
 343    /* if outside the bounds */
 344    if (coords[0] > (bounds[0] + bounds[2]) ||
 345        coords[1] > (bounds[1] + bounds[3]) ||
 346        (coords[0] + coords[2]) < bounds[0] ||
 347        (coords[1] + coords[3]) < bounds[1]) {
 348       coords[0] = 0.f;
 349       coords[1] = 0.f;
 350       coords[2] = 0.f;
 351       coords[3] = 0.f;
 352       shift[0] = 0.f;
 353       shift[1] = 0.f;
 354       return;
 355    }
 356
 357    /* bound x */
 358    if (coords[0] < bounds[0]) {
 359       shift[0] = bounds[0] - coords[0];
 360       coords[2] -= shift[0];
 361       coords[0] = bounds[0];
 362    } else
 363       shift[0] = 0.f;
 364
 365    /* bound y */
 366    if (coords[1] < bounds[1]) {
 367       shift[1] = bounds[1] - coords[1];
 368       coords[3] -= shift[1];
 369       coords[1] = bounds[1];
 370    } else
 371       shift[1] = 0.f;
 372
 373    shift[2] = bounds[2] - coords[2];
 374    shift[3] = bounds[3] - coords[3];
 375    /* bound width/height */
 376    coords[2] = MIN2(coords[2], bounds[2]);
 377    coords[3] = MIN2(coords[3], bounds[3]);
 378
 379    /* bound x/y + width/height */
 380    if ((coords[0] + coords[2]) > (bounds[0] + bounds[2])) {
 381       coords[2] = (bounds[0] + bounds[2]) - coords[0];
 382    }
 383    if ((coords[1] + coords[3]) > (bounds[1] + bounds[3])) {
 384       coords[3] = (bounds[1] + bounds[3]) - coords[1];
 385    }
 386
 387    /* if outside the bounds */
 388    if ((coords[0] + coords[2]) < bounds[0] ||
 389        (coords[1] + coords[3]) < bounds[1]) {
 390       coords[0] = 0.f;
 391       coords[1] = 0.f;
 392       coords[2] = 0.f;
 393       coords[3] = 0.f;
 394       return;
 395    }
 396 }
 397
 398 static INLINE void sync_size(float *src_loc, float *dst_loc)
 399 {
 400    src_loc[2] = MIN2(src_loc[2], dst_loc[2]);
 401    src_loc[3] = MIN2(src_loc[3], dst_loc[3]);
 402    dst_loc[2] = src_loc[2];
 403    dst_loc[3] = src_loc[3];
 404 }
 405
 406 static void renderer_copy_texture(struct xorg_renderer *r,
 407                                   struct pipe_texture *src,
 408                                   float sx1, float sy1,
 409                                   float sx2, float sy2,
 410                                   struct pipe_texture *dst,
 411                                   float dx1, float dy1,
 412                                   float dx2, float dy2)
 413 {
 414    struct pipe_context *pipe = r->pipe;
 415    struct pipe_screen *screen = pipe->screen;
 416    struct pipe_buffer *buf;
 417    struct pipe_surface *dst_surf = screen->get_tex_surface(
 418       screen, dst, 0, 0, 0,
 419       PIPE_BUFFER_USAGE_GPU_WRITE);
 420    struct pipe_framebuffer_state fb;
 421    float s0, t0, s1, t1;
 422    struct xorg_shader shader;
 423
 424    assert(src->width[0] != 0);
 425    assert(src->height[0] != 0);
 426    assert(dst->width[0] != 0);
 427    assert(dst->height[0] != 0);
 428
 429 #if 1
 430    s0 = sx1 / src->width[0];
 431    s1 = sx2 / src->width[0];
 432    t0 = sy1 / src->height[0];
 433    t1 = sy2 / src->height[0];
 434 #else
 435    s0 = 0;
 436    s1 = 1;
 437    t0 = 0;
 438    t1 = 1;
 439 #endif
 440
 441 #if 0
 442    debug_printf("copy texture src=[%f, %f, %f, %f], dst=[%f, %f, %f, %f], tex=[%f, %f, %f, %f]\n",
 443                 sx1, sy1, sx2, sy2, dx1, dy1, dx2, dy2,
 444                 s0, t0, s1, t1);
 445 #endif
 446
 447    assert(screen->is_format_supported(screen, dst_surf->format,
 448                                       PIPE_TEXTURE_2D,
 449                                       PIPE_TEXTURE_USAGE_RENDER_TARGET,
 450                                       0));
 451
 452    /* save state (restored below) */
 453    cso_save_blend(r->cso);
 454    cso_save_samplers(r->cso);
 455    cso_save_sampler_textures(r->cso);
 456    cso_save_framebuffer(r->cso);
 457    cso_save_fragment_shader(r->cso);
 458    cso_save_vertex_shader(r->cso);
 459
 460    cso_save_viewport(r->cso);
 461
 462
 463    /* set misc state we care about */
 464    {
 465       struct pipe_blend_state blend;
 466       memset(&blend, 0, sizeof(blend));
 467       blend.rgb_src_factor = PIPE_BLENDFACTOR_ONE;
 468       blend.alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 469       blend.rgb_dst_factor = PIPE_BLENDFACTOR_ZERO;
 470       blend.alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 471       blend.colormask = PIPE_MASK_RGBA;
 472       cso_set_blend(r->cso, &blend);
 473    }
 474
 475    /* sampler */
 476    {
 477       struct pipe_sampler_state sampler;
 478       memset(&sampler, 0, sizeof(sampler));
 479       sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 480       sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 481       sampler.wrap_r = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 482       sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 483       sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 484       sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 485       sampler.normalized_coords = 1;
 486       cso_single_sampler(r->cso, 0, &sampler);
 487       cso_single_sampler_done(r->cso);
 488    }
 489
 490    set_viewport(r, dst_surf->width, dst_surf->height, Y0_TOP);
 491
 492    /* texture */
 493    cso_set_sampler_textures(r->cso, 1, &src);
 494
 495    renderer_bind_rasterizer(r);
 496
 497    /* shaders */
 498    shader = xorg_shaders_get(r->shaders,
 499                              VS_COMPOSITE,
 500                              FS_COMPOSITE);
 501    cso_set_vertex_shader_handle(r->cso, shader.vs);
 502    cso_set_fragment_shader_handle(r->cso, shader.fs);
 503
 504    /* drawing dest */
 505    memset(&fb, 0, sizeof(fb));
 506    fb.width = dst_surf->width;
 507    fb.height = dst_surf->height;
 508    fb.nr_cbufs = 1;
 509    fb.cbufs[0] = dst_surf;
 510    {
 511       int i;
 512       for (i = 1; i < PIPE_MAX_COLOR_BUFS; ++i)
 513          fb.cbufs[i] = 0;
 514    }
 515    cso_set_framebuffer(r->cso, &fb);
 516    setup_vs_constant_buffer(r, fb.width, fb.height);
 517    setup_fs_constant_buffer(r);
 518
 519    /* draw quad */
 520    buf = setup_vertex_data_tex(r,
 521                                dx1, dy1,
 522                                dx2, dy2,
 523                                s0, t0, s1, t1,
 524                                0.0f);
 525
 526    if (buf) {
 527       util_draw_vertex_buffer(r->pipe, buf, 0,
 528                               PIPE_PRIM_TRIANGLE_FAN,
 529                               4,  /* verts */
 530                               2); /* attribs/vert */
 531
 532       pipe_buffer_reference(&buf, NULL);
 533    }
 534
 535    /* restore state we changed */
 536    cso_restore_blend(r->cso);
 537    cso_restore_samplers(r->cso);
 538    cso_restore_sampler_textures(r->cso);
 539    cso_restore_framebuffer(r->cso);
 540    cso_restore_vertex_shader(r->cso);
 541    cso_restore_fragment_shader(r->cso);
 542    cso_restore_viewport(r->cso);
 543
 544    pipe_surface_reference(&dst_surf, NULL);
 545 }
 546
 547 static struct pipe_texture *
 548 create_sampler_texture(struct xorg_renderer *r,
 549                        struct pipe_texture *src)
 550 {
 551    enum pipe_format format;
 552    struct pipe_context *pipe = r->pipe;
 553    struct pipe_screen *screen = pipe->screen;
 554    struct pipe_texture *pt;
 555    struct pipe_texture templ;
 556
 557    pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 558
 559    /* the coming in texture should already have that invariance */
 560    debug_assert(screen->is_format_supported(screen, src->format,
 561                                             PIPE_TEXTURE_2D,
 562                                             PIPE_TEXTURE_USAGE_SAMPLER, 0));
 563
 564    format = src->format;
 565
 566    memset(&templ, 0, sizeof(templ));
 567    templ.target = PIPE_TEXTURE_2D;
 568    templ.format = format;
 569    templ.last_level = 0;
 570    templ.width[0] = src->width[0];
 571    templ.height[0] = src->height[0];
 572    templ.depth[0] = 1;
 573    pf_get_block(format, &templ.block);
 574    templ.tex_usage = PIPE_TEXTURE_USAGE_SAMPLER;
 575
 576    pt = screen->texture_create(screen, &templ);
 577
 578    debug_assert(!pt || pipe_is_referenced(&pt->reference));
 579
 580    if (!pt)
 581       return NULL;
 582
 583    {
 584       /* copy source framebuffer surface into texture */
 585       struct pipe_surface *ps_read = screen->get_tex_surface(
 586          screen, src, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_READ);
 587       struct pipe_surface *ps_tex = screen->get_tex_surface(
 588          screen, pt, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_WRITE );
 589       pipe->surface_copy(pipe,
 590                          ps_tex, /* dest */
 591                          0, 0, /* destx/y */
 592                          ps_read,
 593                          0, 0, src->width[0], src->height[0]);
 594       pipe_surface_reference(&ps_read, NULL);
 595       pipe_surface_reference(&ps_tex, NULL);
 596    }
 597
 598    return pt;
 599 }
 600
 601
 602 void renderer_copy_pixmap(struct xorg_renderer *r,
 603                           struct exa_pixmap_priv *dst_priv, int dx, int dy,
 604                           struct exa_pixmap_priv *src_priv, int sx, int sy,
 605                           int width, int height)
 606 {
 607    float dst_loc[4], src_loc[4];
 608    float dst_bounds[4], src_bounds[4];
 609    float src_shift[4], dst_shift[4], shift[4];
 610    struct pipe_texture *dst = dst_priv->tex;
 611    struct pipe_texture *src = src_priv->tex;
 612
 613    if (r->pipe->is_texture_referenced(r->pipe, src, 0, 0) &
 614        PIPE_REFERENCED_FOR_WRITE)
 615       r->pipe->flush(r->pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 616
 617    dst_loc[0] = dx;
 618    dst_loc[1] = dy;
 619    dst_loc[2] = width;
 620    dst_loc[3] = height;
 621    dst_bounds[0] = 0.f;
 622    dst_bounds[1] = 0.f;
 623    dst_bounds[2] = dst->width[0];
 624    dst_bounds[3] = dst->height[0];
 625
 626    src_loc[0] = sx;
 627    src_loc[1] = sy;
 628    src_loc[2] = width;
 629    src_loc[3] = height;
 630    src_bounds[0] = 0.f;
 631    src_bounds[1] = 0.f;
 632    src_bounds[2] = src->width[0];
 633    src_bounds[3] = src->height[0];
 634
 635    bound_rect(src_loc, src_bounds, src_shift);
 636    bound_rect(dst_loc, dst_bounds, dst_shift);
 637    shift[0] = src_shift[0] - dst_shift[0];
 638    shift[1] = src_shift[1] - dst_shift[1];
 639
 640    if (shift[0] < 0)
 641       shift_rectx(src_loc, src_bounds, -shift[0]);
 642    else
 643       shift_rectx(dst_loc, dst_bounds, shift[0]);
 644
 645    if (shift[1] < 0)
 646       shift_recty(src_loc, src_bounds, -shift[1]);
 647    else
 648       shift_recty(dst_loc, dst_bounds, shift[1]);
 649
 650    sync_size(src_loc, dst_loc);
 651
 652    if (src_loc[2] >= 0 && src_loc[3] >= 0 &&
 653        dst_loc[2] >= 0 && dst_loc[3] >= 0) {
 654       struct pipe_texture *temp_src = src;
 655
 656       if (src == dst)
 657          temp_src = create_sampler_texture(r, src);
 658
 659       renderer_copy_texture(r,
 660                             temp_src,
 661                             src_loc[0],
 662                             src_loc[1],
 663                             src_loc[0] + src_loc[2],
 664                             src_loc[1] + src_loc[3],
 665                             dst,
 666                             dst_loc[0],
 667                             dst_loc[1],
 668                             dst_loc[0] + dst_loc[2],
 669                             dst_loc[1] + dst_loc[3]);
 670
 671       if (src == dst)
 672          pipe_texture_reference(&temp_src, NULL);
 673    }
 674 }
 675
 676 void renderer_draw_solid_rect(struct xorg_renderer *r,
 677                               int x0, int y0,
 678                               int x1, int y1,
 679                               float *color)
 680 {
 681    struct pipe_context *pipe = r->pipe;
 682    struct pipe_buffer *buf = 0;
 683
 684    /* 1st vertex */
 685    setup_vertex0(r->vertices2[0], x0, y0, color);
 686    /* 2nd vertex */
 687    setup_vertex0(r->vertices2[1], x1, y0, color);
 688    /* 3rd vertex */
 689    setup_vertex0(r->vertices2[2], x1, y1, color);
 690    /* 4th vertex */
 691    setup_vertex0(r->vertices2[3], x0, y1, color);
 692
 693    buf = pipe_user_buffer_create(pipe->screen,
 694                                  r->vertices2,
 695                                  sizeof(r->vertices2));
 696
 697
 698    if (buf) {
 699       util_draw_vertex_buffer(pipe, buf, 0,
 700                               PIPE_PRIM_TRIANGLE_FAN,
 701                               4,  /* verts */
 702                               2); /* attribs/vert */
 703
 704       pipe_buffer_reference(&buf, NULL);
 705    }
 706 }
 707
 708 void renderer_draw_textures(struct xorg_renderer *r,
 709                             int *pos,
 710                             int width, int height,
 711                             struct pipe_texture **textures,
 712                             int num_textures)
 713 {
 714    struct pipe_context *pipe = r->pipe;
 715    struct pipe_buffer *buf = 0;
 716
 717    switch(num_textures) {
 718    case 1:
 719       buf = setup_vertex_data1(r,
 720                                pos[0], pos[1], /* src */
 721                                pos[4], pos[5], /* dst */
 722                                width, height,
 723                                textures[0]);
 724       break;
 725    case 2:
 726       buf = setup_vertex_data2(r,
 727                                pos[0], pos[1], /* src */
 728                                pos[2], pos[3], /* mask */
 729                                pos[4], pos[5], /* dst */
 730                                width, height,
 731                                textures[0], textures[1]);
 732       break;
 733    default:
 734       debug_assert(!"Unsupported number of textures");
 735       break;
 736    }
 737
 738    if (buf) {
 739       int num_attribs = 1; /*pos*/
 740       num_attribs += num_textures;
 741
 742       util_draw_vertex_buffer(pipe, buf, 0,
 743                               PIPE_PRIM_TRIANGLE_FAN,
 744                               4,  /* verts */
 745                               num_attribs); /* attribs/vert */
 746
 747       pipe_buffer_reference(&buf, NULL);
 748    }
 749 }