src/gallium/state_trackers/vega/vg_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.  All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sub license, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial portions
  15  * of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  **************************************************************************/
  26
  27 #include "vg_context.h"
  28
  29 #include "paint.h"
  30 #include "renderer.h"
  31 #include "shaders_cache.h"
  32 #include "shader.h"
  33 #include "asm_util.h"
  34 #include "st_inlines.h"
  35
  36 #include "pipe/p_context.h"
  37 #include "pipe/p_inlines.h"
  38 #include "pipe/p_shader_tokens.h"
  39
  40 #include "cso_cache/cso_context.h"
  41
  42 #include "util/u_simple_shaders.h"
  43 #include "util/u_memory.h"
  44 #include "util/u_blit.h"
  45
  46 struct vg_context *_vg_context = 0;
  47
  48 struct vg_context * vg_current_context(void)
  49 {
  50    return _vg_context;
  51 }
  52
  53 static void init_clear(struct vg_context *st)
  54 {
  55    struct pipe_context *pipe = st->pipe;
  56
  57    /* rasterizer state: bypass clipping */
  58    memset(&st->clear.raster, 0, sizeof(st->clear.raster));
  59    st->clear.raster.gl_rasterization_rules = 1;
  60
  61    /* fragment shader state: color pass-through program */
  62    st->clear.fs =
  63       util_make_fragment_passthrough_shader(pipe);
  64 }
  65 void vg_set_current_context(struct vg_context *ctx)
  66 {
  67    _vg_context = ctx;
  68 }
  69
  70 struct vg_context * vg_create_context(struct pipe_context *pipe,
  71                                       const void *visual,
  72                                       struct vg_context *share)
  73 {
  74    struct vg_context *ctx;
  75
  76    ctx = CALLOC_STRUCT(vg_context);
  77
  78    ctx->pipe = pipe;
  79
  80    vg_init_state(&ctx->state.vg);
  81    ctx->state.dirty = ALL_DIRTY;
  82
  83    ctx->cso_context = cso_create_context(pipe);
  84
  85    init_clear(ctx);
  86
  87    ctx->default_paint = paint_create(ctx);
  88    ctx->state.vg.stroke_paint = ctx->default_paint;
  89    ctx->state.vg.fill_paint = ctx->default_paint;
  90
  91
  92    ctx->mask.sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
  93    ctx->mask.sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
  94    ctx->mask.sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
  95    ctx->mask.sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
  96    ctx->mask.sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
  97    ctx->mask.sampler.normalized_coords = 0;
  98
  99    ctx->blend_sampler.wrap_s = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 100    ctx->blend_sampler.wrap_t = PIPE_TEX_WRAP_CLAMP_TO_EDGE;
 101    ctx->blend_sampler.min_mip_filter = PIPE_TEX_MIPFILTER_NONE;
 102    ctx->blend_sampler.min_img_filter = PIPE_TEX_FILTER_NEAREST;
 103    ctx->blend_sampler.mag_img_filter = PIPE_TEX_FILTER_NEAREST;
 104    ctx->blend_sampler.normalized_coords = 0;
 105
 106    vg_set_error(ctx, VG_NO_ERROR);
 107
 108    ctx->owned_objects[VG_OBJECT_PAINT] = cso_hash_create();
 109    ctx->owned_objects[VG_OBJECT_IMAGE] = cso_hash_create();
 110    ctx->owned_objects[VG_OBJECT_MASK] = cso_hash_create();
 111    ctx->owned_objects[VG_OBJECT_FONT] = cso_hash_create();
 112    ctx->owned_objects[VG_OBJECT_PATH] = cso_hash_create();
 113
 114    ctx->renderer = renderer_create(ctx);
 115    ctx->sc = shaders_cache_create(ctx);
 116    ctx->shader = shader_create(ctx);
 117
 118    ctx->blit = util_create_blit(ctx->pipe, ctx->cso_context);
 119
 120    return ctx;
 121 }
 122
 123 void vg_destroy_context(struct vg_context *ctx)
 124 {
 125    struct pipe_constant_buffer *cbuf = &ctx->mask.cbuf;
 126    struct pipe_constant_buffer *vsbuf = &ctx->vs_const_buffer;
 127
 128    util_destroy_blit(ctx->blit);
 129    renderer_destroy(ctx->renderer);
 130    shaders_cache_destroy(ctx->sc);
 131    shader_destroy(ctx->shader);
 132    paint_destroy(ctx->default_paint);
 133
 134    if (cbuf && cbuf->buffer)
 135       pipe_buffer_reference(&cbuf->buffer, NULL);
 136
 137    if (vsbuf && vsbuf->buffer)
 138       pipe_buffer_reference(&vsbuf->buffer, NULL);
 139
 140    if (ctx->clear.fs) {
 141       cso_delete_fragment_shader(ctx->cso_context, ctx->clear.fs);
 142       ctx->clear.fs = NULL;
 143    }
 144
 145    if (ctx->plain_vs) {
 146       vg_shader_destroy(ctx, ctx->plain_vs);
 147       ctx->plain_vs = NULL;
 148    }
 149    if (ctx->clear_vs) {
 150       vg_shader_destroy(ctx, ctx->clear_vs);
 151       ctx->clear_vs = NULL;
 152    }
 153    if (ctx->texture_vs) {
 154       vg_shader_destroy(ctx, ctx->texture_vs);
 155       ctx->texture_vs = NULL;
 156    }
 157
 158    if (ctx->pass_through_depth_fs)
 159       vg_shader_destroy(ctx, ctx->pass_through_depth_fs);
 160    if (ctx->mask.union_fs)
 161       vg_shader_destroy(ctx, ctx->mask.union_fs);
 162    if (ctx->mask.intersect_fs)
 163       vg_shader_destroy(ctx, ctx->mask.intersect_fs);
 164    if (ctx->mask.subtract_fs)
 165       vg_shader_destroy(ctx, ctx->mask.subtract_fs);
 166    if (ctx->mask.set_fs)
 167       vg_shader_destroy(ctx, ctx->mask.set_fs);
 168
 169    cso_release_all(ctx->cso_context);
 170    cso_destroy_context(ctx->cso_context);
 171
 172    cso_hash_delete(ctx->owned_objects[VG_OBJECT_PAINT]);
 173    cso_hash_delete(ctx->owned_objects[VG_OBJECT_IMAGE]);
 174    cso_hash_delete(ctx->owned_objects[VG_OBJECT_MASK]);
 175    cso_hash_delete(ctx->owned_objects[VG_OBJECT_FONT]);
 176    cso_hash_delete(ctx->owned_objects[VG_OBJECT_PATH]);
 177
 178    free(ctx);
 179 }
 180
 181 void vg_init_object(struct vg_object *obj, struct vg_context *ctx, enum vg_object_type type)
 182 {
 183    obj->type = type;
 184    obj->ctx = ctx;
 185 }
 186
 187 VGboolean vg_context_is_object_valid(struct vg_context *ctx,
 188                                 enum vg_object_type type,
 189                                 void *ptr)
 190 {
 191     if (ctx) {
 192        struct cso_hash *hash = ctx->owned_objects[type];
 193        if (!hash)
 194           return VG_FALSE;
 195        return cso_hash_contains(hash, (unsigned)(long)ptr);
 196     }
 197     return VG_FALSE;
 198 }
 199
 200 void vg_context_add_object(struct vg_context *ctx,
 201                            enum vg_object_type type,
 202                            void *ptr)
 203 {
 204     if (ctx) {
 205        struct cso_hash *hash = ctx->owned_objects[type];
 206        if (!hash)
 207           return;
 208        cso_hash_insert(hash, (unsigned)(long)ptr, ptr);
 209     }
 210 }
 211
 212 void vg_context_remove_object(struct vg_context *ctx,
 213                               enum vg_object_type type,
 214                               void *ptr)
 215 {
 216    if (ctx) {
 217       struct cso_hash *hash = ctx->owned_objects[type];
 218       if (!hash)
 219          return;
 220       cso_hash_take(hash, (unsigned)(long)ptr);
 221    }
 222 }
 223
 224 static void update_clip_state(struct vg_context *ctx)
 225 {
 226    struct pipe_depth_stencil_alpha_state *dsa = &ctx->state.g3d.dsa;
 227    struct vg_state *state =  &ctx->state.vg;
 228
 229    memset(dsa, 0, sizeof(struct pipe_depth_stencil_alpha_state));
 230
 231    if (state->scissoring) {
 232       struct pipe_blend_state *blend = &ctx->state.g3d.blend;
 233       struct pipe_framebuffer_state *fb = &ctx->state.g3d.fb;
 234       int i;
 235       dsa->depth.writemask = 1;/*glDepthMask(TRUE);*/
 236       dsa->depth.func = PIPE_FUNC_ALWAYS;
 237       dsa->depth.enabled = 1;
 238
 239       cso_save_blend(ctx->cso_context);
 240       cso_save_fragment_shader(ctx->cso_context);
 241       /* set a passthrough shader */
 242       if (!ctx->pass_through_depth_fs)
 243          ctx->pass_through_depth_fs = shader_create_from_text(ctx->pipe,
 244                                                               pass_through_depth_asm,
 245                                                               40,
 246                                                               PIPE_SHADER_FRAGMENT);
 247       cso_set_fragment_shader_handle(ctx->cso_context,
 248                                      ctx->pass_through_depth_fs->driver);
 249       cso_set_depth_stencil_alpha(ctx->cso_context, dsa);
 250
 251       ctx->pipe->clear(ctx->pipe, PIPE_CLEAR_DEPTHSTENCIL, NULL, 1.0, 0);
 252
 253       /* disable color writes */
 254       blend->colormask = 0; /*disable colorwrites*/
 255       cso_set_blend(ctx->cso_context, blend);
 256
 257       /* enable scissoring */
 258       for (i = 0; i < state->scissor_rects_num; ++i) {
 259          const float x      = state->scissor_rects[i * 4 + 0].f;
 260          const float y      = state->scissor_rects[i * 4 + 1].f;
 261          const float width  = state->scissor_rects[i * 4 + 2].f;
 262          const float height = state->scissor_rects[i * 4 + 3].f;
 263          VGfloat minx, miny, maxx, maxy;
 264
 265          minx = 0;
 266          miny = 0;
 267          maxx = fb->width;
 268          maxy = fb->height;
 269
 270          if (x > minx)
 271             minx = x;
 272          if (y > miny)
 273             miny = y;
 274
 275          if (x + width < maxx)
 276             maxx = x + width;
 277          if (y + height < maxy)
 278             maxy = y + height;
 279
 280          /* check for null space */
 281          if (minx >= maxx || miny >= maxy)
 282             minx = miny = maxx = maxy = 0;
 283
 284          /*glClear(GL_DEPTH_BUFFER_BIT);*/
 285          renderer_draw_quad(ctx->renderer, minx, miny, maxx, maxy, 0.0f);
 286       }
 287
 288       blend->colormask = 1; /*enable colorwrites*/
 289       cso_restore_blend(ctx->cso_context);
 290       cso_restore_fragment_shader(ctx->cso_context);
 291
 292       dsa->depth.enabled = 1; /* glEnable(GL_DEPTH_TEST); */
 293       dsa->depth.writemask = 0;/*glDepthMask(FALSE);*/
 294       dsa->depth.func = PIPE_FUNC_GEQUAL;
 295    }
 296 }
 297
 298 void vg_validate_state(struct vg_context *ctx)
 299 {
 300    if ((ctx->state.dirty & BLEND_DIRTY)) {
 301       struct pipe_blend_state *blend = &ctx->state.g3d.blend;
 302       memset(blend, 0, sizeof(struct pipe_blend_state));
 303       blend->blend_enable = 1;
 304       blend->colormask |= PIPE_MASK_R;
 305       blend->colormask |= PIPE_MASK_G;
 306       blend->colormask |= PIPE_MASK_B;
 307       blend->colormask |= PIPE_MASK_A;
 308
 309       switch (ctx->state.vg.blend_mode) {
 310       case VG_BLEND_SRC:
 311          blend->rgb_src_factor   = PIPE_BLENDFACTOR_ONE;
 312          blend->alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 313          blend->rgb_dst_factor   = PIPE_BLENDFACTOR_ZERO;
 314          blend->alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 315          break;
 316       case VG_BLEND_SRC_OVER:
 317          blend->rgb_src_factor   = PIPE_BLENDFACTOR_SRC_ALPHA;
 318          blend->alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 319          blend->rgb_dst_factor   = PIPE_BLENDFACTOR_INV_SRC_ALPHA;
 320          blend->alpha_dst_factor = PIPE_BLENDFACTOR_INV_SRC_ALPHA;
 321          break;
 322       case VG_BLEND_DST_OVER:
 323          blend->rgb_src_factor   = PIPE_BLENDFACTOR_INV_DST_ALPHA;
 324          blend->alpha_src_factor = PIPE_BLENDFACTOR_INV_DST_ALPHA;
 325          blend->rgb_dst_factor   = PIPE_BLENDFACTOR_DST_ALPHA;
 326          blend->alpha_dst_factor = PIPE_BLENDFACTOR_DST_ALPHA;
 327          break;
 328       case VG_BLEND_SRC_IN:
 329          blend->rgb_src_factor   = PIPE_BLENDFACTOR_DST_ALPHA;
 330          blend->alpha_src_factor = PIPE_BLENDFACTOR_DST_ALPHA;
 331          blend->rgb_dst_factor   = PIPE_BLENDFACTOR_ZERO;
 332          blend->alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 333          break;
 334       case VG_BLEND_DST_IN:
 335          blend->rgb_src_factor   = PIPE_BLENDFACTOR_ZERO;
 336          blend->alpha_src_factor = PIPE_BLENDFACTOR_ZERO;
 337          blend->rgb_dst_factor   = PIPE_BLENDFACTOR_SRC_ALPHA;
 338          blend->alpha_dst_factor = PIPE_BLENDFACTOR_SRC_ALPHA;
 339          break;
 340       case VG_BLEND_MULTIPLY:
 341       case VG_BLEND_SCREEN:
 342       case VG_BLEND_DARKEN:
 343       case VG_BLEND_LIGHTEN:
 344          blend->rgb_src_factor   = PIPE_BLENDFACTOR_ONE;
 345          blend->alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 346          blend->rgb_dst_factor   = PIPE_BLENDFACTOR_ZERO;
 347          blend->alpha_dst_factor = PIPE_BLENDFACTOR_ZERO;
 348          break;
 349       case VG_BLEND_ADDITIVE:
 350          blend->rgb_src_factor   = PIPE_BLENDFACTOR_ONE;
 351          blend->alpha_src_factor = PIPE_BLENDFACTOR_ONE;
 352          blend->rgb_dst_factor   = PIPE_BLENDFACTOR_ONE;
 353          blend->alpha_dst_factor = PIPE_BLENDFACTOR_ONE;
 354          break;
 355       default:
 356          assert(!"not implemented blend mode");
 357       }
 358       cso_set_blend(ctx->cso_context, &ctx->state.g3d.blend);
 359    }
 360    if ((ctx->state.dirty & RASTERIZER_DIRTY)) {
 361       struct pipe_rasterizer_state *raster = &ctx->state.g3d.rasterizer;
 362       memset(raster, 0, sizeof(struct pipe_rasterizer_state));
 363       raster->gl_rasterization_rules = 1;
 364       cso_set_rasterizer(ctx->cso_context, &ctx->state.g3d.rasterizer);
 365    }
 366    if ((ctx->state.dirty & VIEWPORT_DIRTY)) {
 367       struct pipe_framebuffer_state *fb = &ctx->state.g3d.fb;
 368       const VGint param_bytes = 8 * sizeof(VGfloat);
 369       VGfloat vs_consts[8] = {
 370          2.f/fb->width, 2.f/fb->height, 1, 1,
 371          -1, -1, 0, 0
 372       };
 373       struct pipe_constant_buffer *cbuf = &ctx->vs_const_buffer;
 374
 375       vg_set_viewport(ctx, VEGA_Y0_BOTTOM);
 376
 377       pipe_buffer_reference(&cbuf->buffer, NULL);
 378       cbuf->buffer = pipe_buffer_create(ctx->pipe->screen, 16,
 379                                         PIPE_BUFFER_USAGE_CONSTANT,
 380                                         param_bytes);
 381
 382       if (cbuf->buffer) {
 383          st_no_flush_pipe_buffer_write(ctx, cbuf->buffer,
 384                                        0, param_bytes, vs_consts);
 385       }
 386       ctx->pipe->set_constant_buffer(ctx->pipe, PIPE_SHADER_VERTEX, 0, cbuf);
 387    }
 388    if ((ctx->state.dirty & VS_DIRTY)) {
 389       cso_set_vertex_shader_handle(ctx->cso_context,
 390                                    vg_plain_vs(ctx));
 391    }
 392
 393    /* must be last because it renders to the depth buffer*/
 394    if ((ctx->state.dirty & DEPTH_STENCIL_DIRTY)) {
 395       update_clip_state(ctx);
 396       cso_set_depth_stencil_alpha(ctx->cso_context, &ctx->state.g3d.dsa);
 397    }
 398
 399    shader_set_masking(ctx->shader, ctx->state.vg.masking);
 400    shader_set_image_mode(ctx->shader, ctx->state.vg.image_mode);
 401
 402    ctx->state.dirty = NONE_DIRTY;
 403 }
 404
 405 VGboolean vg_object_is_valid(void *ptr, enum vg_object_type type)
 406 {
 407    struct vg_object *obj = ptr;
 408    if (ptr && is_aligned(obj) && obj->type == type)
 409       return VG_TRUE;
 410    else
 411       return VG_FALSE;
 412 }
 413
 414 void vg_set_error(struct vg_context *ctx,
 415                   VGErrorCode code)
 416 {
 417    /*vgGetError returns the oldest error code provided by
 418     * an API call on the current context since the previous
 419     * call to vgGetError on that context (or since the creation
 420     of the context).*/
 421    if (ctx->_error == VG_NO_ERROR)
 422       ctx->_error = code;
 423 }
 424
 425 void vg_prepare_blend_surface(struct vg_context *ctx)
 426 {
 427    struct pipe_surface *dest_surface = NULL;
 428    struct pipe_context *pipe = ctx->pipe;
 429    struct st_framebuffer *stfb = ctx->draw_buffer;
 430    struct st_renderbuffer *strb = stfb->strb;
 431
 432    /* first finish all pending rendering */
 433    vgFinish();
 434
 435    dest_surface = pipe->screen->get_tex_surface(pipe->screen,
 436                                                 stfb->blend_texture,
 437                                                 0, 0, 0,
 438                                                 PIPE_BUFFER_USAGE_GPU_WRITE);
 439    /* flip it, because we want to use it as a sampler */
 440    util_blit_pixels_tex(ctx->blit,
 441                         strb->texture,
 442                         0, strb->height,
 443                         strb->width, 0,
 444                         dest_surface,
 445                         0, 0,
 446                         strb->width, strb->height,
 447                         0.0, PIPE_TEX_MIPFILTER_NEAREST);
 448
 449    if (dest_surface)
 450       pipe_surface_reference(&dest_surface, NULL);
 451
 452    /* make sure it's complete */
 453    vgFinish();
 454 }
 455
 456
 457 void vg_prepare_blend_surface_from_mask(struct vg_context *ctx)
 458 {
 459    struct pipe_surface *dest_surface = NULL;
 460    struct pipe_context *pipe = ctx->pipe;
 461    struct st_framebuffer *stfb = ctx->draw_buffer;
 462    struct st_renderbuffer *strb = stfb->strb;
 463
 464    vg_validate_state(ctx);
 465
 466    /* first finish all pending rendering */
 467    vgFinish();
 468
 469    dest_surface = pipe->screen->get_tex_surface(pipe->screen,
 470                                                 stfb->blend_texture,
 471                                                 0, 0, 0,
 472                                                 PIPE_BUFFER_USAGE_GPU_WRITE);
 473
 474    /* flip it, because we want to use it as a sampler */
 475    util_blit_pixels_tex(ctx->blit,
 476                         stfb->alpha_mask,
 477                         0, strb->height,
 478                         strb->width, 0,
 479                         dest_surface,
 480                         0, 0,
 481                         strb->width, strb->height,
 482                         0.0, PIPE_TEX_MIPFILTER_NEAREST);
 483
 484    /* make sure it's complete */
 485    vgFinish();
 486
 487    if (dest_surface)
 488       pipe_surface_reference(&dest_surface, NULL);
 489 }
 490
 491 void * vg_plain_vs(struct vg_context *ctx)
 492 {
 493    if (!ctx->plain_vs) {
 494       ctx->plain_vs = shader_create_from_text(ctx->pipe,
 495                                               vs_plain_asm,
 496                                               200,
 497                                               PIPE_SHADER_VERTEX);
 498    }
 499
 500    return ctx->plain_vs->driver;
 501 }
 502
 503
 504 void * vg_clear_vs(struct vg_context *ctx)
 505 {
 506    if (!ctx->clear_vs) {
 507       ctx->clear_vs = shader_create_from_text(ctx->pipe,
 508                                               vs_clear_asm,
 509                                               200,
 510                                               PIPE_SHADER_VERTEX);
 511    }
 512
 513    return ctx->clear_vs->driver;
 514 }
 515
 516 void * vg_texture_vs(struct vg_context *ctx)
 517 {
 518    if (!ctx->texture_vs) {
 519       ctx->texture_vs = shader_create_from_text(ctx->pipe,
 520                                                 vs_texture_asm,
 521                                                 200,
 522                                                 PIPE_SHADER_VERTEX);
 523    }
 524
 525    return ctx->texture_vs->driver;
 526 }
 527
 528 void vg_set_viewport(struct vg_context *ctx, VegaOrientation orientation)
 529 {
 530    struct pipe_viewport_state viewport;
 531    struct pipe_framebuffer_state *fb = &ctx->state.g3d.fb;
 532    VGfloat y_scale = (orientation == VEGA_Y0_BOTTOM) ? -2.f : 2.f;
 533
 534    viewport.scale[0] =  fb->width / 2.f;
 535    viewport.scale[1] =  fb->height / y_scale;
 536    viewport.scale[2] =  1.0;
 537    viewport.scale[3] =  1.0;
 538    viewport.translate[0] = fb->width / 2.f;
 539    viewport.translate[1] = fb->height / 2.f;
 540    viewport.translate[2] = 0.0;
 541    viewport.translate[3] = 0.0;
 542
 543    cso_set_viewport(ctx->cso_context, &viewport);
 544 }