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      1 /**************************************************************************
      2  *
      3  * Copyright 2007 VMware, Inc.
      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 VMWARE 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 #include "util/u_memory.h"
     44 
     45 
     46 #define DBG if(0) printf
     47 
     48 
     49 /**
     50  * Allocate a new pipe_resource object
     51  * width0, height0, depth0 are the dimensions of the level 0 image
     52  * (the highest resolution).  last_level indicates how many mipmap levels
     53  * to allocate storage for.  For non-mipmapped textures, this will be zero.
     54  */
     55 struct pipe_resource *
     56 st_texture_create(struct st_context *st,
     57                   enum pipe_texture_target target,
     58 		  enum pipe_format format,
     59 		  GLuint last_level,
     60 		  GLuint width0,
     61 		  GLuint height0,
     62 		  GLuint depth0,
     63                   GLuint layers,
     64                   GLuint nr_samples,
     65                   GLuint bind )
     66 {
     67    struct pipe_resource pt, *newtex;
     68    struct pipe_screen *screen = st->pipe->screen;
     69 
     70    assert(target < PIPE_MAX_TEXTURE_TYPES);
     71    assert(width0 > 0);
     72    assert(height0 > 0);
     73    assert(depth0 > 0);
     74    if (target == PIPE_TEXTURE_CUBE)
     75       assert(layers == 6);
     76 
     77    DBG("%s target %d format %s last_level %d\n", __func__,
     78        (int) target, util_format_name(format), last_level);
     79 
     80    assert(format);
     81    assert(screen->is_format_supported(screen, format, target, 0,
     82                                       PIPE_BIND_SAMPLER_VIEW));
     83 
     84    memset(&pt, 0, sizeof(pt));
     85    pt.target = target;
     86    pt.format = format;
     87    pt.last_level = last_level;
     88    pt.width0 = width0;
     89    pt.height0 = height0;
     90    pt.depth0 = depth0;
     91    pt.array_size = layers;
     92    pt.usage = PIPE_USAGE_DEFAULT;
     93    pt.bind = bind;
     94    /* only set this for OpenGL textures, not renderbuffers */
     95    pt.flags = PIPE_RESOURCE_FLAG_TEXTURING_MORE_LIKELY;
     96    pt.nr_samples = nr_samples;
     97 
     98    newtex = screen->resource_create(screen, &pt);
     99 
    100    assert(!newtex || pipe_is_referenced(&newtex->reference));
    101 
    102    return newtex;
    103 }
    104 
    105 
    106 /**
    107  * In OpenGL the number of 1D array texture layers is the "height" and
    108  * the number of 2D array texture layers is the "depth".  In Gallium the
    109  * number of layers in an array texture is a separate 'array_size' field.
    110  * This function converts dimensions from the former to the later.
    111  */
    112 void
    113 st_gl_texture_dims_to_pipe_dims(GLenum texture,
    114                                 GLuint widthIn,
    115                                 GLuint heightIn,
    116                                 GLuint depthIn,
    117                                 GLuint *widthOut,
    118                                 GLuint *heightOut,
    119                                 GLuint *depthOut,
    120                                 GLuint *layersOut)
    121 {
    122    switch (texture) {
    123    case GL_TEXTURE_1D:
    124    case GL_PROXY_TEXTURE_1D:
    125       assert(heightIn == 1);
    126       assert(depthIn == 1);
    127       *widthOut = widthIn;
    128       *heightOut = 1;
    129       *depthOut = 1;
    130       *layersOut = 1;
    131       break;
    132    case GL_TEXTURE_1D_ARRAY:
    133    case GL_PROXY_TEXTURE_1D_ARRAY:
    134       assert(depthIn == 1);
    135       *widthOut = widthIn;
    136       *heightOut = 1;
    137       *depthOut = 1;
    138       *layersOut = heightIn;
    139       break;
    140    case GL_TEXTURE_2D:
    141    case GL_PROXY_TEXTURE_2D:
    142    case GL_TEXTURE_RECTANGLE:
    143    case GL_PROXY_TEXTURE_RECTANGLE:
    144    case GL_TEXTURE_EXTERNAL_OES:
    145    case GL_PROXY_TEXTURE_2D_MULTISAMPLE:
    146    case GL_TEXTURE_2D_MULTISAMPLE:
    147       assert(depthIn == 1);
    148       *widthOut = widthIn;
    149       *heightOut = heightIn;
    150       *depthOut = 1;
    151       *layersOut = 1;
    152       break;
    153    case GL_TEXTURE_CUBE_MAP:
    154    case GL_PROXY_TEXTURE_CUBE_MAP:
    155    case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
    156    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
    157    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
    158    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
    159    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
    160    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
    161       assert(depthIn == 1);
    162       *widthOut = widthIn;
    163       *heightOut = heightIn;
    164       *depthOut = 1;
    165       *layersOut = 6;
    166       break;
    167    case GL_TEXTURE_2D_ARRAY:
    168    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
    169    case GL_PROXY_TEXTURE_2D_ARRAY:
    170    case GL_PROXY_TEXTURE_2D_MULTISAMPLE_ARRAY:
    171       *widthOut = widthIn;
    172       *heightOut = heightIn;
    173       *depthOut = 1;
    174       *layersOut = depthIn;
    175       break;
    176    case GL_TEXTURE_CUBE_MAP_ARRAY:
    177    case GL_PROXY_TEXTURE_CUBE_MAP_ARRAY:
    178       *widthOut = widthIn;
    179       *heightOut = heightIn;
    180       *depthOut = 1;
    181       *layersOut = util_align_npot(depthIn, 6);
    182       break;
    183    default:
    184       assert(0 && "Unexpected texture in st_gl_texture_dims_to_pipe_dims()");
    185       /* fall-through */
    186    case GL_TEXTURE_3D:
    187    case GL_PROXY_TEXTURE_3D:
    188       *widthOut = widthIn;
    189       *heightOut = heightIn;
    190       *depthOut = depthIn;
    191       *layersOut = 1;
    192       break;
    193    }
    194 }
    195 
    196 
    197 /**
    198  * Check if a texture image can be pulled into a unified mipmap texture.
    199  */
    200 GLboolean
    201 st_texture_match_image(struct st_context *st,
    202                        const struct pipe_resource *pt,
    203                        const struct gl_texture_image *image)
    204 {
    205    GLuint ptWidth, ptHeight, ptDepth, ptLayers;
    206 
    207    /* Images with borders are never pulled into mipmap textures.
    208     */
    209    if (image->Border)
    210       return GL_FALSE;
    211 
    212    /* Check if this image's format matches the established texture's format.
    213     */
    214    if (st_mesa_format_to_pipe_format(st, image->TexFormat) != pt->format)
    215       return GL_FALSE;
    216 
    217    st_gl_texture_dims_to_pipe_dims(image->TexObject->Target,
    218                                    image->Width, image->Height, image->Depth,
    219                                    &ptWidth, &ptHeight, &ptDepth, &ptLayers);
    220 
    221    /* Test if this image's size matches what's expected in the
    222     * established texture.
    223     */
    224    if (ptWidth != u_minify(pt->width0, image->Level) ||
    225        ptHeight != u_minify(pt->height0, image->Level) ||
    226        ptDepth != u_minify(pt->depth0, image->Level) ||
    227        ptLayers != pt->array_size)
    228       return GL_FALSE;
    229 
    230    if (image->Level > pt->last_level)
    231       return GL_FALSE;
    232 
    233    return GL_TRUE;
    234 }
    235 
    236 
    237 /**
    238  * Map a texture image and return the address for a particular 2D face/slice/
    239  * layer.  The stImage indicates the cube face and mipmap level.  The slice
    240  * of the 3D texture is passed in 'zoffset'.
    241  * \param usage  one of the PIPE_TRANSFER_x values
    242  * \param x, y, w, h  the region of interest of the 2D image.
    243  * \return address of mapping or NULL if any error
    244  */
    245 GLubyte *
    246 st_texture_image_map(struct st_context *st, struct st_texture_image *stImage,
    247                      enum pipe_transfer_usage usage,
    248                      GLuint x, GLuint y, GLuint z,
    249                      GLuint w, GLuint h, GLuint d,
    250                      struct pipe_transfer **transfer)
    251 {
    252    struct st_texture_object *stObj =
    253       st_texture_object(stImage->base.TexObject);
    254    GLuint level;
    255    void *map;
    256 
    257    DBG("%s \n", __func__);
    258 
    259    if (!stImage->pt)
    260       return NULL;
    261 
    262    if (stObj->pt != stImage->pt)
    263       level = 0;
    264    else
    265       level = stImage->base.Level;
    266 
    267    if (stObj->base.Immutable) {
    268       level += stObj->base.MinLevel;
    269       z += stObj->base.MinLayer;
    270       if (stObj->pt->array_size > 1)
    271          d = MIN2(d, stObj->base.NumLayers);
    272    }
    273 
    274    z += stImage->base.Face;
    275 
    276    map = pipe_transfer_map_3d(st->pipe, stImage->pt, level, usage,
    277                               x, y, z, w, h, d, transfer);
    278    if (map) {
    279       /* Enlarge the transfer array if it's not large enough. */
    280       if (z >= stImage->num_transfers) {
    281          unsigned new_size = z + 1;
    282 
    283          stImage->transfer = realloc(stImage->transfer,
    284                      new_size * sizeof(struct st_texture_image_transfer));
    285          memset(&stImage->transfer[stImage->num_transfers], 0,
    286                 (new_size - stImage->num_transfers) *
    287                 sizeof(struct st_texture_image_transfer));
    288          stImage->num_transfers = new_size;
    289       }
    290 
    291       assert(!stImage->transfer[z].transfer);
    292       stImage->transfer[z].transfer = *transfer;
    293    }
    294    return map;
    295 }
    296 
    297 
    298 void
    299 st_texture_image_unmap(struct st_context *st,
    300                        struct st_texture_image *stImage, unsigned slice)
    301 {
    302    struct pipe_context *pipe = st->pipe;
    303    struct st_texture_object *stObj =
    304       st_texture_object(stImage->base.TexObject);
    305    struct pipe_transfer **transfer;
    306 
    307    if (stObj->base.Immutable)
    308       slice += stObj->base.MinLayer;
    309    transfer = &stImage->transfer[slice + stImage->base.Face].transfer;
    310 
    311    DBG("%s\n", __func__);
    312 
    313    pipe_transfer_unmap(pipe, *transfer);
    314    *transfer = NULL;
    315 }
    316 
    317 /**
    318  * For debug only: get/print center pixel in the src resource.
    319  */
    320 static void
    321 print_center_pixel(struct pipe_context *pipe, struct pipe_resource *src)
    322 {
    323    struct pipe_transfer *xfer;
    324    struct pipe_box region;
    325    ubyte *map;
    326 
    327    region.x = src->width0 / 2;
    328    region.y = src->height0 / 2;
    329    region.z = 0;
    330    region.width = 1;
    331    region.height = 1;
    332    region.depth = 1;
    333 
    334    map = pipe->transfer_map(pipe, src, 0, PIPE_TRANSFER_READ, &region, &xfer);
    335 
    336    printf("center pixel: %d %d %d %d\n", map[0], map[1], map[2], map[3]);
    337 
    338    pipe->transfer_unmap(pipe, xfer);
    339 }
    340 
    341 
    342 /**
    343  * Copy the image at level=0 in 'src' to the 'dst' resource at 'dstLevel'.
    344  * This is used to copy mipmap images from one texture buffer to another.
    345  * This typically happens when our initial guess at the total texture size
    346  * is incorrect (see the guess_and_alloc_texture() function).
    347  */
    348 void
    349 st_texture_image_copy(struct pipe_context *pipe,
    350                       struct pipe_resource *dst, GLuint dstLevel,
    351                       struct pipe_resource *src, GLuint srcLevel,
    352                       GLuint face)
    353 {
    354    GLuint width = u_minify(dst->width0, dstLevel);
    355    GLuint height = u_minify(dst->height0, dstLevel);
    356    GLuint depth = u_minify(dst->depth0, dstLevel);
    357    struct pipe_box src_box;
    358    GLuint i;
    359 
    360    if (u_minify(src->width0, srcLevel) != width ||
    361        u_minify(src->height0, srcLevel) != height ||
    362        u_minify(src->depth0, srcLevel) != depth) {
    363       /* The source image size doesn't match the destination image size.
    364        * This can happen in some degenerate situations such as rendering to a
    365        * cube map face which was set up with mismatched texture sizes.
    366        */
    367       return;
    368    }
    369 
    370    src_box.x = 0;
    371    src_box.y = 0;
    372    src_box.width = width;
    373    src_box.height = height;
    374    src_box.depth = 1;
    375 
    376    if (src->target == PIPE_TEXTURE_1D_ARRAY ||
    377        src->target == PIPE_TEXTURE_2D_ARRAY ||
    378        src->target == PIPE_TEXTURE_CUBE_ARRAY) {
    379       face = 0;
    380       depth = src->array_size;
    381    }
    382 
    383    /* Loop over 3D image slices */
    384    /* could (and probably should) use "true" 3d box here -
    385       but drivers can't quite handle it yet */
    386    for (i = face; i < face + depth; i++) {
    387       src_box.z = i;
    388 
    389       if (0)  {
    390          print_center_pixel(pipe, src);
    391       }
    392 
    393       pipe->resource_copy_region(pipe,
    394                                  dst,
    395                                  dstLevel,
    396                                  0, 0, i,/* destX, Y, Z */
    397                                  src,
    398                                  srcLevel,
    399                                  &src_box);
    400    }
    401 }
    402 
    403 
    404 struct pipe_resource *
    405 st_create_color_map_texture(struct gl_context *ctx)
    406 {
    407    struct st_context *st = st_context(ctx);
    408    struct pipe_resource *pt;
    409    enum pipe_format format;
    410    const uint texSize = 256; /* simple, and usually perfect */
    411 
    412    /* find an RGBA texture format */
    413    format = st_choose_format(st, GL_RGBA, GL_NONE, GL_NONE,
    414                              PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW,
    415                              FALSE);
    416 
    417    /* create texture for color map/table */
    418    pt = st_texture_create(st, PIPE_TEXTURE_2D, format, 0,
    419                           texSize, texSize, 1, 1, 0, PIPE_BIND_SAMPLER_VIEW);
    420    return pt;
    421 }
    422