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 "st_context.h"
  29 #include "st_format.h"
  30 #include "st_texture.h"
  31 #include "enums.h"
  32
  33 #include "pipe/p_state.h"
  34 #include "pipe/p_context.h"
  35 #include "pipe/p_defines.h"
  36 #include "pipe/p_inlines.h"
  37 #include "pipe/p_util.h"
  38 #include "pipe/p_inlines.h"
  39 #include "pipe/p_winsys.h"
  40
  41
  42 #define DBG if(0) printf
  43
  44 #if 0
  45 static GLenum
  46 target_to_target(GLenum target)
  47 {
  48    switch (target) {
  49    case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB:
  50    case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB:
  51    case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB:
  52    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB:
  53    case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB:
  54    case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB:
  55       return GL_TEXTURE_CUBE_MAP_ARB;
  56    default:
  57       return target;
  58    }
  59 }
  60 #endif
  61
  62
  63 /**
  64  * Allocate a new pipe_texture object
  65  * width0, height0, depth0 are the dimensions of the level 0 image
  66  * (the highest resolution).  last_level indicates how many mipmap levels
  67  * to allocate storage for.  For non-mipmapped textures, this will be zero.
  68  */
  69 struct pipe_texture *
  70 st_texture_create(struct st_context *st,
  71                   enum pipe_texture_target target,
  72                   enum pipe_format format,
  73                   GLuint last_level,
  74                   GLuint width0,
  75                   GLuint height0,
  76                   GLuint depth0,
  77                   GLuint compress_byte)
  78 {
  79    struct pipe_texture pt, *newtex;
  80    struct pipe_screen *screen = st->pipe->screen;
  81
  82    assert(target <= PIPE_TEXTURE_CUBE);
  83
  84    DBG("%s target %s format %s last_level %d\n", __FUNCTION__,
  85        _mesa_lookup_enum_by_nr(target),
  86        _mesa_lookup_enum_by_nr(format), last_level);
  87
  88    assert(format);
  89
  90    memset(&pt, 0, sizeof(pt));
  91    pt.target = target;
  92    pt.format = format;
  93    pt.last_level = last_level;
  94    pt.width[0] = width0;
  95    pt.height[0] = height0;
  96    pt.depth[0] = depth0;
  97    pt.compressed = compress_byte ? 1 : 0;
  98    pt.cpp = pt.compressed ? compress_byte : st_sizeof_format(format);
  99
 100    newtex = screen->texture_create(screen, &pt);
 101
 102    assert(!newtex || newtex->refcount == 1);
 103
 104    return newtex;
 105 }
 106
 107
 108 /**
 109  * Check if a texture image be pulled into a unified mipmap texture.
 110  * This mirrors the completeness test in a lot of ways.
 111  *
 112  * Not sure whether I want to pass gl_texture_image here.
 113  */
 114 GLboolean
 115 st_texture_match_image(const struct pipe_texture *pt,
 116                        const struct gl_texture_image *image,
 117                        GLuint face, GLuint level)
 118 {
 119    /* Images with borders are never pulled into mipmap textures.
 120     */
 121    if (image->Border)
 122       return GL_FALSE;
 123
 124    if (st_mesa_format_to_pipe_format(image->TexFormat->MesaFormat) != pt->format ||
 125        image->IsCompressed != pt->compressed)
 126       return GL_FALSE;
 127
 128    /* Test image dimensions against the base level image adjusted for
 129     * minification.  This will also catch images not present in the
 130     * texture, changed targets, etc.
 131     */
 132    if (image->Width != pt->width[level] ||
 133        image->Height != pt->height[level] ||
 134        image->Depth != pt->depth[level])
 135       return GL_FALSE;
 136
 137    return GL_TRUE;
 138 }
 139
 140
 141 #if 000
 142 /* Although we use the image_offset[] array to store relative offsets
 143  * to cube faces, Mesa doesn't know anything about this and expects
 144  * each cube face to be treated as a separate image.
 145  *
 146  * These functions present that view to mesa:
 147  */
 148 const GLuint *
 149 st_texture_depth_offsets(struct pipe_texture *pt, GLuint level)
 150 {
 151    static const GLuint zero = 0;
 152
 153    if (pt->target != PIPE_TEXTURE_3D || pt->level[level].nr_images == 1)
 154       return &zero;
 155    else
 156       return pt->level[level].image_offset;
 157 }
 158
 159
 160 /**
 161  * Return the offset to the given mipmap texture image within the
 162  * texture memory buffer, in bytes.
 163  */
 164 GLuint
 165 st_texture_image_offset(const struct pipe_texture * pt,
 166                         GLuint face, GLuint level)
 167 {
 168    if (pt->target == PIPE_TEXTURE_CUBE)
 169       return (pt->level[level].level_offset +
 170               pt->level[level].image_offset[face] * pt->cpp);
 171    else
 172       return pt->level[level].level_offset;
 173 }
 174 #endif
 175
 176
 177 /**
 178  * Map a teximage in a mipmap texture.
 179  * \param row_stride  returns row stride in bytes
 180  * \param image_stride  returns image stride in bytes (for 3D textures).
 181  * \return address of mapping
 182  */
 183 GLubyte *
 184 st_texture_image_map(struct st_context *st, struct st_texture_image *stImage,
 185                      GLuint zoffset)
 186 {
 187    struct pipe_screen *screen = st->pipe->screen;
 188    struct pipe_texture *pt = stImage->pt;
 189    DBG("%s \n", __FUNCTION__);
 190
 191    stImage->surface = screen->get_tex_surface(screen, pt, stImage->face,
 192                                               stImage->level, zoffset);
 193
 194    return pipe_surface_map(stImage->surface);
 195 }
 196
 197
 198 void
 199 st_texture_image_unmap(struct st_texture_image *stImage)
 200 {
 201    DBG("%s\n", __FUNCTION__);
 202
 203    pipe_surface_unmap(stImage->surface);
 204
 205    pipe_surface_reference(&stImage->surface, NULL);
 206 }
 207
 208
 209
 210 /**
 211  * Upload data to a rectangular sub-region.  Lots of choices how to do this:
 212  *
 213  * - memcpy by span to current destination
 214  * - upload data as new buffer and blit
 215  *
 216  * Currently always memcpy.
 217  */
 218 static void
 219 st_surface_data(struct pipe_context *pipe,
 220                 struct pipe_surface *dst,
 221                 unsigned dstx, unsigned dsty,
 222                 const void *src, unsigned src_pitch,
 223                 unsigned srcx, unsigned srcy, unsigned width, unsigned height)
 224 {
 225    pipe_copy_rect(pipe_surface_map(dst),
 226                   dst->cpp,
 227                   dst->pitch,
 228                   dstx, dsty, width, height, src, src_pitch, srcx, srcy);
 229
 230    pipe_surface_unmap(dst);
 231 }
 232
 233
 234 /* Upload data for a particular image.
 235  */
 236 void
 237 st_texture_image_data(struct pipe_context *pipe,
 238                       struct pipe_texture *dst,
 239                       GLuint face,
 240                       GLuint level,
 241                       void *src,
 242                       GLuint src_row_pitch, GLuint src_image_pitch)
 243 {
 244    struct pipe_screen *screen = pipe->screen;
 245    GLuint depth = dst->depth[level];
 246    GLuint i;
 247    GLuint height = 0;
 248    const GLubyte *srcUB = src;
 249    struct pipe_surface *dst_surface;
 250
 251    DBG("%s\n", __FUNCTION__);
 252    for (i = 0; i < depth; i++) {
 253       height = dst->height[level];
 254       if(dst->compressed)
 255          height /= 4;
 256
 257       dst_surface = screen->get_tex_surface(screen, dst, face, level, i);
 258
 259       st_surface_data(pipe, dst_surface,
 260                       0, 0,                             /* dstx, dsty */
 261                       srcUB,
 262                       src_row_pitch,
 263                       0, 0,                             /* source x, y */
 264                       dst->width[level], height);       /* width, height */
 265
 266       pipe_surface_reference(&dst_surface, NULL);
 267
 268       srcUB += src_image_pitch * dst->cpp;
 269    }
 270 }
 271
 272
 273 /* Copy mipmap image between textures
 274  */
 275 void
 276 st_texture_image_copy(struct pipe_context *pipe,
 277                       struct pipe_texture *dst, GLuint dstLevel,
 278                       struct pipe_texture *src,
 279                       GLuint face)
 280 {
 281    struct pipe_screen *screen = pipe->screen;
 282    GLuint width = dst->width[dstLevel];
 283    GLuint height = dst->height[dstLevel];
 284    GLuint depth = dst->depth[dstLevel];
 285    struct pipe_surface *src_surface;
 286    struct pipe_surface *dst_surface;
 287    GLuint i;
 288
 289    /* XXX this is a hack */
 290    if (dst->compressed)
 291       height /= 4;
 292
 293    for (i = 0; i < depth; i++) {
 294       GLuint srcLevel;
 295
 296       /* find src texture level of needed size */
 297       for (srcLevel = 0; srcLevel <= src->last_level; srcLevel++) {
 298          if (src->width[srcLevel] == width &&
 299              src->height[srcLevel] == height) {
 300             break;
 301          }
 302       }
 303       assert(src->width[srcLevel] == width);
 304       assert(src->height[srcLevel] == height);
 305
 306       dst_surface = screen->get_tex_surface(screen, dst, face, dstLevel, i);
 307       src_surface = screen->get_tex_surface(screen, src, face, srcLevel, i);
 308
 309       pipe->surface_copy(pipe,
 310                          FALSE,
 311                          dst_surface,
 312                          0, 0, /* destX, Y */
 313                          src_surface,
 314                          0, 0, /* srcX, Y */
 315                          width, height);
 316
 317       pipe_surface_reference(&dst_surface, NULL);
 318       pipe_surface_reference(&src_surface, NULL);
 319    }
 320 }