src/gallium/state_trackers/vega/mask.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 "mask.h"
  28
  29 #include "path.h"
  30 #include "image.h"
  31 #include "shaders_cache.h"
  32 #include "renderer.h"
  33 #include "asm_util.h"
  34
  35 #include "pipe/p_context.h"
  36 #include "pipe/p_screen.h"
  37 #include "util/u_inlines.h"
  38 #include "util/u_format.h"
  39 #include "util/u_memory.h"
  40 #include "util/u_sampler.h"
  41
  42 struct vg_mask_layer {
  43    struct vg_object base;
  44
  45    VGint width;
  46    VGint height;
  47
  48    struct pipe_sampler_view *sampler_view;
  49 };
  50
  51 static INLINE struct pipe_surface *
  52 alpha_mask_surface(struct vg_context *ctx, int usage)
  53 {
  54    struct pipe_screen *screen = ctx->pipe->screen;
  55    struct st_framebuffer *stfb = ctx->draw_buffer;
  56    return screen->get_tex_surface(screen,
  57                                   stfb->alpha_mask_view->texture,
  58                                   0, 0, 0,
  59                                   usage);
  60 }
  61
  62 static INLINE VGboolean
  63 intersect_rectangles(VGint dwidth, VGint dheight,
  64                      VGint swidth, VGint sheight,
  65                      VGint tx, VGint ty,
  66                      VGint twidth, VGint theight,
  67                      VGint *offsets,
  68                      VGint *location)
  69 {
  70    if (tx + twidth <= 0 || tx >= dwidth)
  71       return VG_FALSE;
  72    if (ty + theight <= 0 || ty >= dheight)
  73       return VG_FALSE;
  74
  75    offsets[0] = 0;
  76    offsets[1] = 0;
  77    location[0] = tx;
  78    location[1] = ty;
  79
  80    if (tx < 0) {
  81       offsets[0] -= tx;
  82       location[0] = 0;
  83
  84       location[2] = MIN2(tx + swidth, MIN2(dwidth, tx + twidth));
  85       offsets[2] = location[2];
  86    } else {
  87       offsets[2] = MIN2(twidth, MIN2(dwidth - tx, swidth ));
  88       location[2] = offsets[2];
  89    }
  90
  91    if (ty < 0) {
  92       offsets[1] -= ty;
  93       location[1] = 0;
  94
  95       location[3] = MIN2(ty + sheight, MIN2(dheight, ty + theight));
  96       offsets[3] = location[3];
  97    } else {
  98       offsets[3] = MIN2(theight, MIN2(dheight - ty, sheight));
  99       location[3] = offsets[3];
 100    }
 101
 102    return VG_TRUE;
 103 }
 104
 105 #if DEBUG_MASKS
 106 static void read_alpha_mask(void * data, VGint dataStride,
 107                             VGImageFormat dataFormat,
 108                             VGint sx, VGint sy,
 109                             VGint width, VGint height)
 110 {
 111    struct vg_context *ctx = vg_current_context();
 112    struct pipe_context *pipe = ctx->pipe;
 113    struct pipe_screen *screen = pipe->screen;
 114
 115    struct st_framebuffer *stfb = ctx->draw_buffer;
 116    struct st_renderbuffer *strb = stfb->alpha_mask;
 117
 118    VGfloat temp[VEGA_MAX_IMAGE_WIDTH][4];
 119    VGfloat *df = (VGfloat*)temp;
 120    VGint y = (stfb->height - sy) - 1, yStep = -1;
 121    VGint i;
 122    VGubyte *dst = (VGubyte *)data;
 123    VGint xoffset = 0, yoffset = 0;
 124
 125    /* make sure rendering has completed */
 126    pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 127    if (sx < 0) {
 128       xoffset = -sx;
 129       xoffset *= _vega_size_for_format(dataFormat);
 130       width += sx;
 131       sx = 0;
 132    }
 133    if (sy < 0) {
 134       yoffset = -sy;
 135       height += sy;
 136       sy = 0;
 137       y = (stfb->height - sy) - 1;
 138       yoffset *= dataStride;
 139    }
 140
 141    {
 142       struct pipe_surface *surf;
 143
 144       surf = screen->get_tex_surface(screen, strb->texture,  0, 0, 0,
 145                                      PIPE_BIND_TRANSFER_READ);
 146
 147       /* Do a row at a time to flip image data vertically */
 148       for (i = 0; i < height; i++) {
 149 #if 0
 150          debug_printf("%d-%d  == %d\n", sy, height, y);
 151 #endif
 152          pipe_get_tile_rgba(surf, sx, y, width, 1, df);
 153          y += yStep;
 154          _vega_pack_rgba_span_float(ctx, width, temp, dataFormat,
 155                                     dst + yoffset + xoffset);
 156          dst += dataStride;
 157       }
 158
 159       pipe_surface_reference(&surf, NULL);
 160    }
 161 }
 162
 163 void save_alpha_to_file(const char *filename)
 164 {
 165    struct vg_context *ctx = vg_current_context();
 166    struct st_framebuffer *stfb = ctx->draw_buffer;
 167    VGint *data;
 168    int i, j;
 169
 170    data = malloc(sizeof(int) * stfb->width * stfb->height);
 171    read_alpha_mask(data, stfb->width * sizeof(int),
 172                    VG_sRGBA_8888,
 173                    0, 0, stfb->width, stfb->height);
 174    fprintf(stderr, "/*---------- start */\n");
 175    fprintf(stderr, "const int image_width = %d;\n",
 176            stfb->width);
 177    fprintf(stderr, "const int image_height = %d;\n",
 178            stfb->height);
 179    fprintf(stderr, "const int image_data = {\n");
 180    for (i = 0; i < stfb->height; ++i) {
 181       for (j = 0; j < stfb->width; ++j) {
 182          int rgba = data[i * stfb->height + j];
 183          int argb = 0;
 184          argb = (rgba >> 8);
 185          argb |= ((rgba & 0xff) << 24);
 186          fprintf(stderr, "0x%x, ", argb);
 187       }
 188       fprintf(stderr, "\n");
 189    }
 190    fprintf(stderr, "};\n");
 191    fprintf(stderr, "/*---------- end */\n");
 192 }
 193 #endif
 194
 195 /* setup mask shader */
 196 static void *setup_mask_operation(VGMaskOperation operation)
 197 {
 198    struct vg_context *ctx = vg_current_context();
 199    void *shader = 0;
 200
 201    switch (operation) {
 202    case VG_UNION_MASK: {
 203       if (!ctx->mask.union_fs) {
 204          ctx->mask.union_fs = shader_create_from_text(ctx->pipe,
 205                                                       union_mask_asm,
 206                                                       200,
 207                                                       PIPE_SHADER_FRAGMENT);
 208       }
 209       shader = ctx->mask.union_fs->driver;
 210    }
 211       break;
 212    case VG_INTERSECT_MASK: {
 213       if (!ctx->mask.intersect_fs) {
 214          ctx->mask.intersect_fs = shader_create_from_text(ctx->pipe,
 215                                                           intersect_mask_asm,
 216                                                           200,
 217                                                           PIPE_SHADER_FRAGMENT);
 218       }
 219       shader = ctx->mask.intersect_fs->driver;
 220    }
 221       break;
 222    case VG_SUBTRACT_MASK: {
 223       if (!ctx->mask.subtract_fs) {
 224          ctx->mask.subtract_fs = shader_create_from_text(ctx->pipe,
 225                                                          subtract_mask_asm,
 226                                                          200,
 227                                                          PIPE_SHADER_FRAGMENT);
 228       }
 229       shader = ctx->mask.subtract_fs->driver;
 230    }
 231       break;
 232    case VG_SET_MASK: {
 233       if (!ctx->mask.set_fs) {
 234          ctx->mask.set_fs = shader_create_from_text(ctx->pipe,
 235                                                     set_mask_asm,
 236                                                     200,
 237                                                     PIPE_SHADER_FRAGMENT);
 238       }
 239       shader = ctx->mask.set_fs->driver;
 240    }
 241       break;
 242    default:
 243          assert(0);
 244       break;
 245    }
 246
 247    return shader;
 248 }
 249
 250 static void mask_resource_fill(struct pipe_resource *dst,
 251                                int x, int y, int width, int height,
 252                                VGfloat coverage)
 253 {
 254    struct vg_context *ctx = vg_current_context();
 255    VGfloat fs_consts[12] = {
 256       0.0f, 0.0f, 0.0f, 0.0f, /* not used */
 257       0.0f, 0.0f, 0.0f, 0.0f, /* not used */
 258       0.0f, 0.0f, 0.0f, coverage /* color */
 259    };
 260    void *fs;
 261
 262    if (x < 0) {
 263       width += x;
 264       x = 0;
 265    }
 266    if (y < 0) {
 267       height += y;
 268       y = 0;
 269    }
 270
 271    fs = shaders_cache_fill(ctx->sc, VEGA_SOLID_FILL_SHADER);
 272
 273    if (renderer_filter_begin(ctx->renderer, dst, VG_FALSE, ~0,
 274             NULL, NULL, 0, fs, (const void *) fs_consts, sizeof(fs_consts))) {
 275       renderer_filter(ctx->renderer, x, y, width, height, 0, 0, 0, 0);
 276       renderer_filter_end(ctx->renderer);
 277    }
 278
 279 #if DEBUG_MASKS
 280    save_alpha_to_file(0);
 281 #endif
 282 }
 283
 284
 285 static void mask_using_texture(struct pipe_sampler_view *sampler_view,
 286                                VGboolean is_layer,
 287                                VGMaskOperation operation,
 288                                VGint x, VGint y,
 289                                VGint width, VGint height)
 290 {
 291    struct vg_context *ctx = vg_current_context();
 292    struct pipe_resource *dst = ctx->draw_buffer->alpha_mask_view->texture;
 293    struct pipe_resource *texture = sampler_view->texture;
 294    const struct pipe_sampler_state *samplers[2];
 295    struct pipe_sampler_view *views[2];
 296    struct pipe_sampler_state sampler;
 297    VGint offsets[4], loc[4];
 298    const VGfloat ones[4] = {1.f, 1.f, 1.f, 1.f};
 299    void *fs;
 300
 301    if (!intersect_rectangles(dst->width0, dst->height0,
 302                              texture->width0, texture->height0,
 303                              x, y, width, height,
 304                              offsets, loc))
 305       return;
 306 #if 0
 307    debug_printf("Offset = [%d, %d, %d, %d]\n", offsets[0],
 308                 offsets[1], offsets[2], offsets[3]);
 309    debug_printf("Locati = [%d, %d, %d, %d]\n", loc[0],
 310                 loc[1], loc[2], loc[3]);
 311 #endif
 312
 313    sampler = ctx->mask.sampler;
 314    sampler.normalized_coords = 1;
 315    samplers[0] = &sampler;
 316    views[0] = sampler_view;
 317
 318    /* prepare our blend surface */
 319    samplers[1] = &ctx->mask.sampler;
 320    views[1] = vg_prepare_blend_surface_from_mask(ctx);
 321
 322    fs = setup_mask_operation(operation);
 323
 324    if (renderer_filter_begin(ctx->renderer, dst, VG_FALSE,
 325             ~0, samplers, views, 2, fs, (const void *) ones, sizeof(ones))) {
 326       /* layer should be flipped when used as a texture */
 327       if (is_layer) {
 328          offsets[1] += offsets[3];
 329          offsets[3] = -offsets[3];
 330       }
 331       renderer_filter(ctx->renderer,
 332             loc[0], loc[1], loc[2], loc[3],
 333             offsets[0], offsets[1], offsets[2], offsets[3]);
 334       renderer_filter_end(ctx->renderer);
 335    }
 336 }
 337
 338
 339 #ifdef OPENVG_VERSION_1_1
 340
 341 struct vg_mask_layer * mask_layer_create(VGint width, VGint height)
 342 {
 343    struct vg_context *ctx = vg_current_context();
 344    struct vg_mask_layer *mask = 0;
 345
 346    mask = CALLOC_STRUCT(vg_mask_layer);
 347    vg_init_object(&mask->base, ctx, VG_OBJECT_MASK);
 348    mask->width = width;
 349    mask->height = height;
 350
 351    {
 352       struct pipe_resource pt;
 353       struct pipe_context *pipe = ctx->pipe;
 354       struct pipe_screen *screen = ctx->pipe->screen;
 355       struct pipe_sampler_view view_templ;
 356       struct pipe_sampler_view *view = NULL;
 357       struct pipe_resource *texture;
 358
 359       memset(&pt, 0, sizeof(pt));
 360       pt.target = PIPE_TEXTURE_2D;
 361       pt.format = PIPE_FORMAT_B8G8R8A8_UNORM;
 362       pt.last_level = 0;
 363       pt.width0 = width;
 364       pt.height0 = height;
 365       pt.depth0 = 1;
 366       pt.bind = PIPE_BIND_SAMPLER_VIEW;
 367
 368       texture = screen->resource_create(screen, &pt);
 369
 370       if (texture) {
 371          u_sampler_view_default_template(&view_templ, texture, texture->format);
 372          view = pipe->create_sampler_view(pipe, texture, &view_templ);
 373       }
 374       pipe_resource_reference(&texture, NULL);
 375       mask->sampler_view = view;
 376    }
 377
 378    vg_context_add_object(ctx, VG_OBJECT_MASK, mask);
 379
 380    return mask;
 381 }
 382
 383 void mask_layer_destroy(struct vg_mask_layer *layer)
 384 {
 385    struct vg_context *ctx = vg_current_context();
 386
 387    vg_context_remove_object(ctx, VG_OBJECT_MASK, layer);
 388    pipe_sampler_view_reference(&layer->sampler_view, NULL);
 389    FREE(layer);
 390 }
 391
 392 void mask_layer_fill(struct vg_mask_layer *layer,
 393                      VGint x, VGint y,
 394                      VGint width, VGint height,
 395                      VGfloat value)
 396 {
 397    VGfloat alpha_color[4] = {0, 0, 0, 0};
 398
 399    alpha_color[3] = value;
 400
 401    mask_resource_fill(layer->sampler_view->texture,
 402                       x, y, width, height, value);
 403 }
 404
 405 void mask_copy(struct vg_mask_layer *layer,
 406                VGint sx, VGint sy,
 407                VGint dx, VGint dy,
 408                VGint width, VGint height)
 409 {
 410    struct vg_context *ctx = vg_current_context();
 411    struct pipe_sampler_view *src = ctx->draw_buffer->alpha_mask_view;
 412    struct pipe_surface *surf;
 413
 414    /* get the destination surface */
 415    surf = ctx->pipe->screen->get_tex_surface(ctx->pipe->screen,
 416          layer->sampler_view->texture, 0, 0, 0, PIPE_BIND_RENDER_TARGET);
 417    if (surf && renderer_copy_begin(ctx->renderer, surf, VG_FALSE, src)) {
 418       /* layer should be flipped when used as a texture */
 419       sy += height;
 420       height = -height;
 421
 422       renderer_copy(ctx->renderer,
 423             dx, dy, width, height,
 424             sx, sy, width, height);
 425       renderer_copy_end(ctx->renderer);
 426    }
 427
 428    pipe_surface_reference(&surf, NULL);
 429 }
 430
 431 static void mask_layer_render_to(struct vg_mask_layer *layer,
 432                                  struct path *path,
 433                                  VGbitfield paint_modes)
 434 {
 435    struct vg_context *ctx = vg_current_context();
 436    struct matrix *mat = &ctx->state.vg.path_user_to_surface_matrix;
 437    struct pipe_surface *surf;
 438
 439    surf = alpha_mask_surface(ctx, PIPE_BIND_RENDER_TARGET);
 440
 441    renderer_validate_for_mask_rendering(ctx->renderer, surf);
 442
 443    if (paint_modes & VG_FILL_PATH) {
 444       path_fill(path, mat);
 445    }
 446
 447    if (paint_modes & VG_STROKE_PATH){
 448       path_stroke(path, mat);
 449    }
 450 }
 451
 452 void mask_render_to(struct path *path,
 453                     VGbitfield paint_modes,
 454                     VGMaskOperation operation)
 455 {
 456    struct vg_context *ctx = vg_current_context();
 457    struct st_framebuffer *fb_buffers = ctx->draw_buffer;
 458    struct vg_mask_layer *temp_layer;
 459    VGint width, height;
 460
 461    width = fb_buffers->alpha_mask_view->texture->width0;
 462    height = fb_buffers->alpha_mask_view->texture->height0;
 463
 464    temp_layer = mask_layer_create(width, height);
 465    mask_layer_fill(temp_layer, 0, 0, width, height, 0.0f);
 466
 467    mask_layer_render_to(temp_layer, path, paint_modes);
 468
 469    mask_using_layer(temp_layer, operation, 0, 0, width, height);
 470
 471    mask_layer_destroy(temp_layer);
 472 }
 473
 474 void mask_using_layer(struct vg_mask_layer *layer,
 475                       VGMaskOperation operation,
 476                       VGint x, VGint y,
 477                       VGint width, VGint height)
 478 {
 479    mask_using_texture(layer->sampler_view, VG_TRUE, operation,
 480                       x, y, width, height);
 481 }
 482
 483 VGint mask_layer_width(struct vg_mask_layer *layer)
 484 {
 485    return layer->width;
 486 }
 487
 488 VGint mask_layer_height(struct vg_mask_layer *layer)
 489 {
 490    return layer->height;
 491 }
 492
 493
 494 #endif
 495
 496 void mask_using_image(struct vg_image *image,
 497                       VGMaskOperation operation,
 498                       VGint x, VGint y,
 499                       VGint width, VGint height)
 500 {
 501    mask_using_texture(image->sampler_view, VG_FALSE, operation,
 502                       x, y, width, height);
 503 }
 504
 505 void mask_fill(VGint x, VGint y, VGint width, VGint height,
 506                VGfloat value)
 507 {
 508    struct vg_context *ctx = vg_current_context();
 509
 510 #if DEBUG_MASKS
 511    debug_printf("mask_fill(%d, %d, %d, %d) with  rgba(%f, %f, %f, %f)\n",
 512                 x, y, width, height,
 513                 0.0f, 0.0f, 0.0f, value);
 514 #endif
 515
 516    mask_resource_fill(ctx->draw_buffer->alpha_mask_view->texture,
 517                       x, y, width, height, value);
 518 }
 519
 520 VGint mask_bind_samplers(struct pipe_sampler_state **samplers,
 521                          struct pipe_sampler_view **sampler_views)
 522 {
 523    struct vg_context *ctx = vg_current_context();
 524
 525    if (ctx->state.vg.masking) {
 526       struct st_framebuffer *fb_buffers = ctx->draw_buffer;
 527
 528       samplers[1] = &ctx->mask.sampler;
 529       sampler_views[1] = fb_buffers->alpha_mask_view;
 530       return 1;
 531    } else
 532       return 0;
 533 }