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    assert(image->Border == 0);
  65
  66    /* Because the driver uses AllocTextureImageBuffer() internally, it may end
  67     * up mismatched with FreeTextureImageBuffer(), but that is safe to call
  68     * multiple times.
  69     */
  70    ctx->Driver.FreeTextureImageBuffer(ctx, image);
  71
  72    if (intel->must_use_separate_stencil
  73        && image->TexFormat == MESA_FORMAT_S8_Z24) {
  74       intel_tex_image_s8z24_create_renderbuffers(intel, intel_image);
  75    }
  76
  77    /* Allocate the swrast_texture_image::ImageOffsets array now */
  78    switch (texobj->Target) {
  79    case GL_TEXTURE_3D:
  80    case GL_TEXTURE_2D_ARRAY:
  81       slices = image->Depth;
  82       break;
  83    case GL_TEXTURE_1D_ARRAY:
  84       slices = image->Height;
  85       break;
  86    default:
  87       slices = 1;
  88    }
  89    assert(!intel_image->base.ImageOffsets);
  90    intel_image->base.ImageOffsets = malloc(slices * sizeof(GLuint));
  91
  92    if (intel_texobj->mt &&
  93        intel_miptree_match_image(intel_texobj->mt, image)) {
  94       intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
  95       DBG("%s: alloc obj %p level %d %dx%dx%d using object's miptree %p\n",
  96           __FUNCTION__, texobj, image->Level,
  97           width, height, depth, intel_texobj->mt);
  98    } else {
  99       intel_image->mt = intel_miptree_create_for_teximage(intel, intel_texobj,
 100                                                           intel_image,
 101                                                           false);
 102
 103       /* Even if the object currently has a mipmap tree associated
 104        * with it, this one is a more likely candidate to represent the
 105        * whole object since our level didn't fit what was there
 106        * before, and any lower levels would fit into our miptree.
 107        */
 108       intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 109
 110       if (intel->must_use_separate_stencil
 111           && image->TexFormat == MESA_FORMAT_S8_Z24) {
 112          intel_tex_image_s8z24_create_renderbuffers(intel, intel_image);
 113       }
 114
 115       DBG("%s: alloc obj %p level %d %dx%dx%d using new miptree %p\n",
 116           __FUNCTION__, texobj, image->Level,
 117           width, height, depth, intel_image->mt);
 118    }
 119
 120    return true;
 121 }
 122
 123 static void
 124 intel_free_texture_image_buffer(struct gl_context * ctx,
 125                                 struct gl_texture_image *texImage)
 126 {
 127    struct intel_texture_image *intelImage = intel_texture_image(texImage);
 128
 129    DBG("%s\n", __FUNCTION__);
 130
 131    intel_miptree_release(&intelImage->mt);
 132
 133    if (intelImage->base.Buffer) {
 134       _mesa_align_free(intelImage->base.Buffer);
 135       intelImage->base.Buffer = NULL;
 136    }
 137
 138    if (intelImage->base.ImageOffsets) {
 139       free(intelImage->base.ImageOffsets);
 140       intelImage->base.ImageOffsets = NULL;
 141    }
 142
 143    _mesa_reference_renderbuffer(&intelImage->depth_rb, NULL);
 144    _mesa_reference_renderbuffer(&intelImage->stencil_rb, NULL);
 145 }
 146
 147 /**
 148  * Map texture memory/buffer into user space.
 149  * Note: the region of interest parameters are ignored here.
 150  * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
 151  * \param mapOut  returns start of mapping of region of interest
 152  * \param rowStrideOut  returns row stride in bytes
 153  */
 154 static void
 155 intel_map_texture_image(struct gl_context *ctx,
 156                         struct gl_texture_image *tex_image,
 157                         GLuint slice,
 158                         GLuint x, GLuint y, GLuint w, GLuint h,
 159                         GLbitfield mode,
 160                         GLubyte **map,
 161                         GLint *stride)
 162 {
 163    struct intel_context *intel = intel_context(ctx);
 164    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 165    struct intel_mipmap_tree *mt = intel_image->mt;
 166    unsigned int bw, bh;
 167    void *base;
 168    unsigned int image_x, image_y;
 169
 170    /* Our texture data is always stored in a miptree. */
 171    assert(mt);
 172
 173    /* Check that our caller wasn't confused about how to map a 1D texture. */
 174    assert(tex_image->TexObject->Target != GL_TEXTURE_1D_ARRAY ||
 175           h == 1);
 176
 177    if (intel_image->stencil_rb) {
 178       /*
 179        * The texture has packed depth/stencil format, but uses separate
 180        * stencil. The texture's embedded stencil buffer contains the real
 181        * stencil data, so copy that into the miptree.
 182        */
 183       intel_tex_image_s8z24_gather(intel, intel_image);
 184    }
 185
 186    /* For compressed formats, the stride is the number of bytes per
 187     * row of blocks.  intel_miptree_get_image_offset() already does
 188     * the divide.
 189     */
 190    _mesa_get_format_block_size(tex_image->TexFormat, &bw, &bh);
 191    assert(y % bh == 0);
 192    y /= bh;
 193
 194    base = intel_region_map(intel, mt->region, mode);
 195    intel_miptree_get_image_offset(mt, tex_image->Level, tex_image->Face,
 196                                   slice, &image_x, &image_y);
 197    x += image_x;
 198    y += image_y;
 199
 200    *stride = mt->region->pitch * mt->cpp;
 201    *map = base + y * *stride + x * mt->cpp;
 202
 203    DBG("%s: %d,%d %dx%d from mt %p %d,%d = %p/%d\n", __FUNCTION__,
 204        x - image_x, y - image_y, w, h,
 205        mt, x, y, *map, *stride);
 206 }
 207
 208 static void
 209 intel_unmap_texture_image(struct gl_context *ctx,
 210                           struct gl_texture_image *tex_image, GLuint slice)
 211 {
 212    struct intel_context *intel = intel_context(ctx);
 213    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 214
 215    intel_region_unmap(intel, intel_image->mt->region);
 216
 217    if (intel_image->stencil_rb) {
 218       /*
 219        * The texture has packed depth/stencil format, but uses separate
 220        * stencil. The texture's embedded stencil buffer contains the real
 221        * stencil data, so copy that into the miptree.
 222        */
 223       intel_tex_image_s8z24_scatter(intel, intel_image);
 224    }
 225 }
 226
 227 /**
 228  * Called via ctx->Driver.GenerateMipmap()
 229  * This is basically a wrapper for _mesa_meta_GenerateMipmap() which checks
 230  * if we'll be using software mipmap generation.  In that case, we need to
 231  * map/unmap the base level texture image.
 232  */
 233 static void
 234 intelGenerateMipmap(struct gl_context *ctx, GLenum target,
 235                     struct gl_texture_object *texObj)
 236 {
 237    if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) {
 238       fallback_debug("%s - fallback to swrast\n", __FUNCTION__);
 239
 240       _mesa_generate_mipmap(ctx, target, texObj);
 241    }
 242    else {
 243       _mesa_meta_GenerateMipmap(ctx, target, texObj);
 244    }
 245 }
 246
 247
 248 void
 249 intelInitTextureFuncs(struct dd_function_table *functions)
 250 {
 251    functions->GenerateMipmap = intelGenerateMipmap;
 252
 253    functions->NewTextureObject = intelNewTextureObject;
 254    functions->NewTextureImage = intelNewTextureImage;
 255    functions->DeleteTextureImage = intelDeleteTextureImage;
 256    functions->DeleteTexture = intelDeleteTextureObject;
 257    functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
 258    functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
 259    functions->MapTextureImage = intel_map_texture_image;
 260    functions->UnmapTextureImage = intel_unmap_texture_image;
 261 }