src/mesa/drivers/dri/intel/intel_tex.c

   1 #include "swrast/swrast.h"
   2 #include "main/renderbuffer.h"
   3 #include "main/texobj.h"
   4 #include "main/teximage.h"
   5 #include "main/mipmap.h"
   6 #include "drivers/common/meta.h"
   7 #include "intel_context.h"
   8 #include "intel_mipmap_tree.h"
   9 #include "intel_tex.h"
  10
  11 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
  12
  13 static struct gl_texture_image *
  14 intelNewTextureImage(struct gl_context * ctx)
  15 {
  16    DBG("%s\n", __FUNCTION__);
  17    (void) ctx;
  18    return (struct gl_texture_image *) CALLOC_STRUCT(intel_texture_image);
  19 }
  20
  21 static void
  22 intelDeleteTextureImage(struct gl_context * ctx, struct gl_texture_image *img)
  23 {
  24    /* nothing special (yet) for intel_texture_image */
  25    _mesa_delete_texture_image(ctx, img);
  26 }
  27
  28
  29 static struct gl_texture_object *
  30 intelNewTextureObject(struct gl_context * ctx, GLuint name, GLenum target)
  31 {
  32    struct intel_texture_object *obj = CALLOC_STRUCT(intel_texture_object);
  33
  34    (void) ctx;
  35
  36    DBG("%s\n", __FUNCTION__);
  37    _mesa_initialize_texture_object(&obj->base, name, target);
  38
  39    return &obj->base;
  40 }
  41
  42 static void
  43 intelDeleteTextureObject(struct gl_context *ctx,
  44                          struct gl_texture_object *texObj)
  45 {
  46    struct intel_texture_object *intelObj = intel_texture_object(texObj);
  47
  48    intel_miptree_release(&intelObj->mt);
  49    _mesa_delete_texture_object(ctx, texObj);
  50 }
  51
  52 static GLboolean
  53 intel_alloc_texture_image_buffer(struct gl_context *ctx,
  54                                  struct gl_texture_image *image,
  55                                  gl_format format, GLsizei width,
  56                                  GLsizei height, GLsizei depth)
  57 {
  58    struct intel_context *intel = intel_context(ctx);
  59    struct intel_texture_image *intel_image = intel_texture_image(image);
  60    struct gl_texture_object *texobj = image->TexObject;
  61    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
  62    GLuint slices;
  63
  64    /* Because the driver uses AllocTextureImageBuffer() internally, it may end
  65     * up mismatched with FreeTextureImageBuffer(), but that is safe to call
  66     * multiple times.
  67     */
  68    ctx->Driver.FreeTextureImageBuffer(ctx, image);
  69
  70    if (intel->must_use_separate_stencil
  71        && image->TexFormat == MESA_FORMAT_S8_Z24) {
  72       intel_tex_image_s8z24_create_renderbuffers(intel, intel_image);
  73    }
  74
  75    /* Allocate the swrast_texture_image::ImageOffsets array now */
  76    switch (texobj->Target) {
  77    case GL_TEXTURE_3D:
  78    case GL_TEXTURE_2D_ARRAY:
  79       slices = image->Depth;
  80       break;
  81    case GL_TEXTURE_1D_ARRAY:
  82       slices = image->Height;
  83       break;
  84    default:
  85       slices = 1;
  86    }
  87    assert(!intel_image->base.ImageOffsets);
  88    intel_image->base.ImageOffsets = malloc(slices * sizeof(GLuint));
  89
  90    if (intel_texobj->mt &&
  91        intel_miptree_match_image(intel_texobj->mt, image)) {
  92       intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
  93       DBG("%s: alloc obj %p level %d %dx%dx%d using object's miptree %p\n",
  94           __FUNCTION__, texobj, image->Level,
  95           width, height, depth, intel_texobj->mt);
  96       return true;
  97    } else if (image->Border == 0) {
  98       intel_image->mt = intel_miptree_create_for_teximage(intel, intel_texobj,
  99                                                           intel_image,
 100                                                           false);
 101
 102       /* Even if the object currently has a mipmap tree associated
 103        * with it, this one is a more likely candidate to represent the
 104        * whole object since our level didn't fit what was there
 105        * before, and any lower levels would fit into our miptree.
 106        */
 107       intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 108
 109       if (intel->must_use_separate_stencil
 110           && image->TexFormat == MESA_FORMAT_S8_Z24) {
 111          intel_tex_image_s8z24_create_renderbuffers(intel, intel_image);
 112       }
 113
 114       DBG("%s: alloc obj %p level %d %dx%dx%d using new miptree %p\n",
 115           __FUNCTION__, texobj, image->Level,
 116           width, height, depth, intel_image->mt);
 117       return true;
 118    }
 119
 120    DBG("%s: alloc obj %p level %d %dx%dx%d using swrast\n",
 121        __FUNCTION__, texobj, image->Level, width, height, depth);
 122
 123    return _swrast_alloc_texture_image_buffer(ctx, image, format,
 124                                              width, height, depth);
 125 }
 126
 127 static void
 128 intel_free_texture_image_buffer(struct gl_context * ctx,
 129                                 struct gl_texture_image *texImage)
 130 {
 131    struct intel_texture_image *intelImage = intel_texture_image(texImage);
 132
 133    DBG("%s\n", __FUNCTION__);
 134
 135    intel_miptree_release(&intelImage->mt);
 136
 137    if (intelImage->base.Data) {
 138       _mesa_align_free(intelImage->base.Data);
 139       intelImage->base.Data = NULL;
 140    }
 141
 142    if (intelImage->base.ImageOffsets) {
 143       free(intelImage->base.ImageOffsets);
 144       intelImage->base.ImageOffsets = NULL;
 145    }
 146
 147    _mesa_reference_renderbuffer(&intelImage->depth_rb, NULL);
 148    _mesa_reference_renderbuffer(&intelImage->stencil_rb, NULL);
 149 }
 150
 151 /**
 152  * Map texture memory/buffer into user space.
 153  * Note: the region of interest parameters are ignored here.
 154  * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
 155  * \param mapOut  returns start of mapping of region of interest
 156  * \param rowStrideOut  returns row stride in bytes
 157  */
 158 static void
 159 intel_map_texture_image(struct gl_context *ctx,
 160                         struct gl_texture_image *tex_image,
 161                         GLuint slice,
 162                         GLuint x, GLuint y, GLuint w, GLuint h,
 163                         GLbitfield mode,
 164                         GLubyte **map,
 165                         GLint *stride)
 166 {
 167    struct intel_context *intel = intel_context(ctx);
 168    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 169    struct intel_mipmap_tree *mt = intel_image->mt;
 170    unsigned int bw, bh;
 171
 172    /* Check that our caller wasn't confused about how to map a 1D texture. */
 173    assert(tex_image->TexObject->Target != GL_TEXTURE_1D_ARRAY ||
 174           h == 1);
 175
 176    if (intel_image->stencil_rb) {
 177       /*
 178        * The texture has packed depth/stencil format, but uses separate
 179        * stencil. The texture's embedded stencil buffer contains the real
 180        * stencil data, so copy that into the miptree.
 181        */
 182       intel_tex_image_s8z24_gather(intel, intel_image);
 183    }
 184
 185    /* For compressed formats, the stride is the number of bytes per
 186     * row of blocks.  intel_miptree_get_image_offset() already does
 187     * the divide.
 188     */
 189    _mesa_get_format_block_size(tex_image->TexFormat, &bw, &bh);
 190    assert(y % bh == 0);
 191    y /= bh;
 192
 193    if (likely(mt)) {
 194       void *base = intel_region_map(intel, mt->region, mode);
 195       unsigned int image_x, image_y;
 196
 197       intel_miptree_get_image_offset(mt, tex_image->Level, tex_image->Face,
 198                                      slice, &image_x, &image_y);
 199       x += image_x;
 200       y += image_y;
 201
 202       *stride = mt->region->pitch * mt->cpp;
 203       *map = base + y * *stride + x * mt->cpp;
 204
 205       DBG("%s: %d,%d %dx%d from mt %p %d,%d = %p/%d\n", __FUNCTION__,
 206           x - image_x, y - image_y, w, h,
 207           mt, x, y, *map, *stride);
 208    } else {
 209       /* texture data is in malloc'd memory */
 210       GLuint width = tex_image->Width;
 211       GLuint height = ALIGN(tex_image->Height, bh) / bh;
 212       GLuint texelSize = _mesa_get_format_bytes(tex_image->TexFormat);
 213
 214       assert(map);
 215
 216       *stride = _mesa_format_row_stride(tex_image->TexFormat, width);
 217       *map = intel_image->base.Data + (slice * height + y) * *stride + x * texelSize;
 218
 219       DBG("%s: %d,%d %dx%d from data %p = %p/%d\n", __FUNCTION__,
 220           x, y, w, h,
 221           intel_image->base.Data, *map, *stride);
 222    }
 223 }
 224
 225 static void
 226 intel_unmap_texture_image(struct gl_context *ctx,
 227                           struct gl_texture_image *tex_image, GLuint slice)
 228 {
 229    struct intel_context *intel = intel_context(ctx);
 230    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 231
 232    if (intel_image->mt)
 233       intel_region_unmap(intel, intel_image->mt->region);
 234
 235    if (intel_image->stencil_rb) {
 236       /*
 237        * The texture has packed depth/stencil format, but uses separate
 238        * stencil. The texture's embedded stencil buffer contains the real
 239        * stencil data, so copy that into the miptree.
 240        */
 241       intel_tex_image_s8z24_scatter(intel, intel_image);
 242    }
 243 }
 244
 245 /**
 246  * Called via ctx->Driver.GenerateMipmap()
 247  * This is basically a wrapper for _mesa_meta_GenerateMipmap() which checks
 248  * if we'll be using software mipmap generation.  In that case, we need to
 249  * map/unmap the base level texture image.
 250  */
 251 static void
 252 intelGenerateMipmap(struct gl_context *ctx, GLenum target,
 253                     struct gl_texture_object *texObj)
 254 {
 255    if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) {
 256       fallback_debug("%s - fallback to swrast\n", __FUNCTION__);
 257
 258       _mesa_generate_mipmap(ctx, target, texObj);
 259    }
 260    else {
 261       _mesa_meta_GenerateMipmap(ctx, target, texObj);
 262    }
 263 }
 264
 265
 266 void
 267 intelInitTextureFuncs(struct dd_function_table *functions)
 268 {
 269    functions->GenerateMipmap = intelGenerateMipmap;
 270
 271    functions->NewTextureObject = intelNewTextureObject;
 272    functions->NewTextureImage = intelNewTextureImage;
 273    functions->DeleteTextureImage = intelDeleteTextureImage;
 274    functions->DeleteTexture = intelDeleteTextureObject;
 275    functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
 276    functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
 277    functions->MapTextureImage = intel_map_texture_image;
 278    functions->UnmapTextureImage = intel_unmap_texture_image;
 279 }