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