src/mesa/state_tracker/st_texture.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include <stdio.h>
  29
  30 #include "st_context.h"
  31 #include "st_format.h"
  32 #include "st_texture.h"
  33 #include "st_cb_fbo.h"
  34 #include "main/enums.h"
  35
  36 #include "pipe/p_state.h"
  37 #include "pipe/p_context.h"
  38 #include "pipe/p_defines.h"
  39 #include "util/u_inlines.h"
  40 #include "util/u_format.h"
  41 #include "util/u_rect.h"
  42 #include "util/u_math.h"
  43
  44
  45 #define DBG if(0) printf
  46
  47
  48 /**
  49  * Allocate a new pipe_resource object
  50  * width0, height0, depth0 are the dimensions of the level 0 image
  51  * (the highest resolution).  last_level indicates how many mipmap levels
  52  * to allocate storage for.  For non-mipmapped textures, this will be zero.
  53  */
  54 struct pipe_resource *
  55 st_texture_create(struct st_context *st,
  56                   enum pipe_texture_target target,
  57                   enum pipe_format format,
  58                   GLuint last_level,
  59                   GLuint width0,
  60                   GLuint height0,
  61                   GLuint depth0,
  62                   GLuint layers,
  63                   GLuint bind )
  64 {
  65    struct pipe_resource pt, *newtex;
  66    struct pipe_screen *screen = st->pipe->screen;
  67
  68    assert(target < PIPE_MAX_TEXTURE_TYPES);
  69    assert(width0 > 0);
  70    assert(height0 > 0);
  71    assert(depth0 > 0);
  72    if (target == PIPE_TEXTURE_CUBE)
  73       assert(layers == 6);
  74
  75    DBG("%s target %d format %s last_level %d\n", __FUNCTION__,
  76        (int) target, util_format_name(format), last_level);
  77
  78    assert(format);
  79    assert(screen->is_format_supported(screen, format, target, 0,
  80                                       PIPE_BIND_SAMPLER_VIEW));
  81
  82    memset(&pt, 0, sizeof(pt));
  83    pt.target = target;
  84    pt.format = format;
  85    pt.last_level = last_level;
  86    pt.width0 = width0;
  87    pt.height0 = height0;
  88    pt.depth0 = depth0;
  89    pt.array_size = (target == PIPE_TEXTURE_CUBE ? 6 : layers);
  90    pt.usage = PIPE_USAGE_DEFAULT;
  91    pt.bind = bind;
  92    pt.flags = 0;
  93
  94    newtex = screen->resource_create(screen, &pt);
  95
  96    assert(!newtex || pipe_is_referenced(&newtex->reference));
  97
  98    return newtex;
  99 }
 100
 101
 102 /**
 103  * In OpenGL the number of 1D array texture layers is the "height" and
 104  * the number of 2D array texture layers is the "depth".  In Gallium the
 105  * number of layers in an array texture is a separate 'array_size' field.
 106  * This function converts dimensions from the former to the later.
 107  */
 108 void
 109 st_gl_texture_dims_to_pipe_dims(GLenum texture,
 110                                 GLuint widthIn,
 111                                 GLuint heightIn,
 112                                 GLuint depthIn,
 113                                 GLuint *widthOut,
 114                                 GLuint *heightOut,
 115                                 GLuint *depthOut,
 116                                 GLuint *layersOut)
 117 {
 118    switch (texture) {
 119    case GL_TEXTURE_1D:
 120       assert(heightIn == 1);
 121       assert(depthIn == 1);
 122       *widthOut = widthIn;
 123       *heightOut = 1;
 124       *depthOut = 1;
 125       *layersOut = 1;
 126       break;
 127    case GL_TEXTURE_1D_ARRAY:
 128       assert(depthIn == 1);
 129       *widthOut = widthIn;
 130       *heightOut = 1;
 131       *depthOut = 1;
 132       *layersOut = heightIn;
 133       break;
 134    case GL_TEXTURE_2D:
 135    case GL_TEXTURE_RECTANGLE:
 136    case GL_TEXTURE_EXTERNAL_OES:
 137       assert(depthIn == 1);
 138       *widthOut = widthIn;
 139       *heightOut = heightIn;
 140       *depthOut = 1;
 141       *layersOut = 1;
 142       break;
 143    case GL_TEXTURE_CUBE_MAP:
 144       assert(depthIn == 1);
 145       *widthOut = widthIn;
 146       *heightOut = heightIn;
 147       *depthOut = 1;
 148       *layersOut = 6;
 149       break;
 150    case GL_TEXTURE_2D_ARRAY:
 151       *widthOut = widthIn;
 152       *heightOut = heightIn;
 153       *depthOut = 1;
 154       *layersOut = depthIn;
 155       break;
 156    default:
 157       assert(0 && "Unexpected texture in st_gl_texture_dims_to_pipe_dims()");
 158       /* fall-through */
 159    case GL_TEXTURE_3D:
 160       *widthOut = widthIn;
 161       *heightOut = heightIn;
 162       *depthOut = depthIn;
 163       *layersOut = 1;
 164       break;
 165    }
 166 }
 167
 168
 169 /**
 170  * Check if a texture image can be pulled into a unified mipmap texture.
 171  */
 172 GLboolean
 173 st_texture_match_image(const struct pipe_resource *pt,
 174                        const struct gl_texture_image *image)
 175 {
 176    GLuint ptWidth, ptHeight, ptDepth, ptLayers;
 177
 178    /* Images with borders are never pulled into mipmap textures.
 179     */
 180    if (image->Border)
 181       return GL_FALSE;
 182
 183    /* Check if this image's format matches the established texture's format.
 184     */
 185    if (st_mesa_format_to_pipe_format(image->TexFormat) != pt->format)
 186       return GL_FALSE;
 187
 188    st_gl_texture_dims_to_pipe_dims(image->TexObject->Target,
 189                                    image->Width, image->Height, image->Depth,
 190                                    &ptWidth, &ptHeight, &ptDepth, &ptLayers);
 191
 192    /* Test if this image's size matches what's expected in the
 193     * established texture.
 194     */
 195    if (ptWidth != u_minify(pt->width0, image->Level) ||
 196        ptHeight != u_minify(pt->height0, image->Level) ||
 197        ptDepth != u_minify(pt->depth0, image->Level) ||
 198        ptLayers != pt->array_size)
 199       return GL_FALSE;
 200
 201    return GL_TRUE;
 202 }
 203
 204
 205 /**
 206  * Map a texture image and return the address for a particular 2D face/slice/
 207  * layer.  The stImage indicates the cube face and mipmap level.  The slice
 208  * of the 3D texture is passed in 'zoffset'.
 209  * \param usage  one of the PIPE_TRANSFER_x values
 210  * \param x, y, w, h  the region of interest of the 2D image.
 211  * \return address of mapping or NULL if any error
 212  */
 213 GLubyte *
 214 st_texture_image_map(struct st_context *st, struct st_texture_image *stImage,
 215                      GLuint zoffset, enum pipe_transfer_usage usage,
 216                      GLuint x, GLuint y, GLuint w, GLuint h)
 217 {
 218    struct st_texture_object *stObj =
 219       st_texture_object(stImage->base.TexObject);
 220    struct pipe_context *pipe = st->pipe;
 221    GLuint level;
 222
 223    DBG("%s \n", __FUNCTION__);
 224
 225    if (!stImage->pt)
 226       return NULL;
 227
 228    if (stObj->pt != stImage->pt)
 229       level = 0;
 230    else
 231       level = stImage->base.Level;
 232
 233    stImage->transfer = pipe_get_transfer(st->pipe, stImage->pt, level,
 234                                          stImage->base.Face + zoffset,
 235                                          usage, x, y, w, h);
 236
 237    if (stImage->transfer)
 238       return pipe_transfer_map(pipe, stImage->transfer);
 239    else
 240       return NULL;
 241 }
 242
 243
 244 void
 245 st_texture_image_unmap(struct st_context *st,
 246                        struct st_texture_image *stImage)
 247 {
 248    struct pipe_context *pipe = st->pipe;
 249
 250    DBG("%s\n", __FUNCTION__);
 251
 252    pipe_transfer_unmap(pipe, stImage->transfer);
 253
 254    pipe->transfer_destroy(pipe, stImage->transfer);
 255    stImage->transfer = NULL;
 256 }
 257
 258
 259
 260 /**
 261  * Upload data to a rectangular sub-region.  Lots of choices how to do this:
 262  *
 263  * - memcpy by span to current destination
 264  * - upload data as new buffer and blit
 265  *
 266  * Currently always memcpy.
 267  */
 268 static void
 269 st_surface_data(struct pipe_context *pipe,
 270                 struct pipe_transfer *dst,
 271                 unsigned dstx, unsigned dsty,
 272                 const void *src, unsigned src_stride,
 273                 unsigned srcx, unsigned srcy, unsigned width, unsigned height)
 274 {
 275    void *map = pipe_transfer_map(pipe, dst);
 276
 277    assert(dst->resource);
 278    util_copy_rect(map,
 279                   dst->resource->format,
 280                   dst->stride,
 281                   dstx, dsty,
 282                   width, height,
 283                   src, src_stride,
 284                   srcx, srcy);
 285
 286    pipe_transfer_unmap(pipe, dst);
 287 }
 288
 289
 290 /* Upload data for a particular image.
 291  */
 292 void
 293 st_texture_image_data(struct st_context *st,
 294                       struct pipe_resource *dst,
 295                       GLuint face,
 296                       GLuint level,
 297                       void *src,
 298                       GLuint src_row_stride, GLuint src_image_stride)
 299 {
 300    struct pipe_context *pipe = st->pipe;
 301    GLuint i;
 302    const GLubyte *srcUB = src;
 303    struct pipe_transfer *dst_transfer;
 304    GLuint layers;
 305
 306    if (dst->target == PIPE_TEXTURE_1D_ARRAY ||
 307        dst->target == PIPE_TEXTURE_2D_ARRAY)
 308       layers = dst->array_size;
 309    else
 310       layers = u_minify(dst->depth0, level);
 311
 312    DBG("%s\n", __FUNCTION__);
 313
 314    for (i = 0; i < layers; i++) {
 315       dst_transfer = pipe_get_transfer(st->pipe, dst, level, face + i,
 316                                        PIPE_TRANSFER_WRITE, 0, 0,
 317                                        u_minify(dst->width0, level),
 318                                        u_minify(dst->height0, level));
 319
 320       st_surface_data(pipe, dst_transfer,
 321                       0, 0,                             /* dstx, dsty */
 322                       srcUB,
 323                       src_row_stride,
 324                       0, 0,                             /* source x, y */
 325                       u_minify(dst->width0, level),
 326                       u_minify(dst->height0, level));    /* width, height */
 327
 328       pipe->transfer_destroy(pipe, dst_transfer);
 329
 330       srcUB += src_image_stride;
 331    }
 332 }
 333
 334
 335 /**
 336  * For debug only: get/print center pixel in the src resource.
 337  */
 338 static void
 339 print_center_pixel(struct pipe_context *pipe, struct pipe_resource *src)
 340 {
 341    struct pipe_transfer *xfer;
 342    struct pipe_box region;
 343    ubyte *map;
 344
 345    region.x = src->width0 / 2;
 346    region.y = src->height0 / 2;
 347    region.z = 0;
 348    region.width = 1;
 349    region.height = 1;
 350    region.depth = 1;
 351
 352    xfer = pipe->get_transfer(pipe, src, 0, PIPE_TRANSFER_READ, &region);
 353    map = pipe->transfer_map(pipe, xfer);
 354
 355    printf("center pixel: %d %d %d %d\n", map[0], map[1], map[2], map[3]);
 356
 357    pipe->transfer_unmap(pipe, xfer);
 358    pipe->transfer_destroy(pipe, xfer);
 359 }
 360
 361
 362 /**
 363  * Copy the image at level=0 in 'src' to the 'dst' resource at 'dstLevel'.
 364  * This is used to copy mipmap images from one texture buffer to another.
 365  * This typically happens when our initial guess at the total texture size
 366  * is incorrect (see the guess_and_alloc_texture() function).
 367  */
 368 void
 369 st_texture_image_copy(struct pipe_context *pipe,
 370                       struct pipe_resource *dst, GLuint dstLevel,
 371                       struct pipe_resource *src, GLuint srcLevel,
 372                       GLuint face)
 373 {
 374    GLuint width = u_minify(dst->width0, dstLevel);
 375    GLuint height = u_minify(dst->height0, dstLevel);
 376    GLuint depth = u_minify(dst->depth0, dstLevel);
 377    struct pipe_box src_box;
 378    GLuint i;
 379
 380    if (u_minify(src->width0, srcLevel) != width ||
 381        u_minify(src->height0, srcLevel) != height ||
 382        u_minify(src->depth0, srcLevel) != depth) {
 383       /* The source image size doesn't match the destination image size.
 384        * This can happen in some degenerate situations such as rendering to a
 385        * cube map face which was set up with mismatched texture sizes.
 386        */
 387       return;
 388    }
 389
 390    src_box.x = 0;
 391    src_box.y = 0;
 392    src_box.width = width;
 393    src_box.height = height;
 394    src_box.depth = 1;
 395    /* Loop over 3D image slices */
 396    /* could (and probably should) use "true" 3d box here -
 397       but drivers can't quite handle it yet */
 398    for (i = face; i < face + depth; i++) {
 399       src_box.z = i;
 400
 401       if (0)  {
 402          print_center_pixel(pipe, src);
 403       }
 404
 405       pipe->resource_copy_region(pipe,
 406                                  dst,
 407                                  dstLevel,
 408                                  0, 0, i,/* destX, Y, Z */
 409                                  src,
 410                                  srcLevel,
 411                                  &src_box);
 412    }
 413 }
 414
 415
 416 struct pipe_resource *
 417 st_create_color_map_texture(struct gl_context *ctx)
 418 {
 419    struct st_context *st = st_context(ctx);
 420    struct pipe_context *pipe = st->pipe;
 421    struct pipe_resource *pt;
 422    enum pipe_format format;
 423    const uint texSize = 256; /* simple, and usually perfect */
 424
 425    /* find an RGBA texture format */
 426    format = st_choose_format(pipe->screen, GL_RGBA, GL_NONE, GL_NONE,
 427                              PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW);
 428
 429    /* create texture for color map/table */
 430    pt = st_texture_create(st, PIPE_TEXTURE_2D, format, 0,
 431                           texSize, texSize, 1, 1, PIPE_BIND_SAMPLER_VIEW);
 432    return pt;
 433 }
 434