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 {
  56    struct intel_context *intel = intel_context(ctx);
  57    struct intel_texture_image *intel_image = intel_texture_image(image);
  58    struct gl_texture_object *texobj = image->TexObject;
  59    struct intel_texture_object *intel_texobj = intel_texture_object(texobj);
  60    GLuint slices;
  61
  62    assert(image->Border == 0);
  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    /* Allocate the swrast_texture_image::ImageOffsets array now */
  71    switch (texobj->Target) {
  72    case GL_TEXTURE_3D:
  73    case GL_TEXTURE_2D_ARRAY:
  74       slices = image->Depth;
  75       break;
  76    case GL_TEXTURE_1D_ARRAY:
  77       slices = image->Height;
  78       break;
  79    default:
  80       slices = 1;
  81    }
  82    assert(!intel_image->base.ImageOffsets);
  83    intel_image->base.ImageOffsets = malloc(slices * sizeof(GLuint));
  84
  85    _swrast_init_texture_image(image);
  86
  87    if (intel_texobj->mt &&
  88        intel_miptree_match_image(intel_texobj->mt, image)) {
  89       intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
  90       DBG("%s: alloc obj %p level %d %dx%dx%d using object's miptree %p\n",
  91           __FUNCTION__, texobj, image->Level,
  92           image->Width, image->Height, image->Depth, intel_texobj->mt);
  93    } else {
  94       intel_image->mt = intel_miptree_create_for_teximage(intel, intel_texobj,
  95                                                           intel_image,
  96                                                           false);
  97
  98       /* Even if the object currently has a mipmap tree associated
  99        * with it, this one is a more likely candidate to represent the
 100        * whole object since our level didn't fit what was there
 101        * before, and any lower levels would fit into our miptree.
 102        */
 103       intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 104
 105       DBG("%s: alloc obj %p level %d %dx%dx%d using new miptree %p\n",
 106           __FUNCTION__, texobj, image->Level,
 107           image->Width, image->Height, image->Depth, intel_image->mt);
 108    }
 109
 110    return true;
 111 }
 112
 113 /**
 114  * Called via ctx->Driver.AllocTextureStorage()
 115  * Just have to allocate memory for the texture images.
 116  */
 117 static GLboolean
 118 intel_alloc_texture_storage(struct gl_context *ctx,
 119                             struct gl_texture_object *texObj,
 120                             GLsizei levels, GLsizei width,
 121                             GLsizei height, GLsizei depth)
 122 {
 123    const int numFaces = _mesa_num_tex_faces(texObj->Target);
 124    int face;
 125    int level;
 126
 127    for (face = 0; face < numFaces; face++) {
 128       for (level = 0; level < levels; level++) {
 129          struct gl_texture_image *const texImage = texObj->Image[face][level];
 130          if (!intel_alloc_texture_image_buffer(ctx, texImage))
 131             return false;
 132       }
 133    }
 134
 135    return true;
 136 }
 137
 138 static void
 139 intel_free_texture_image_buffer(struct gl_context * ctx,
 140                                 struct gl_texture_image *texImage)
 141 {
 142    struct intel_texture_image *intelImage = intel_texture_image(texImage);
 143
 144    DBG("%s\n", __FUNCTION__);
 145
 146    intel_miptree_release(&intelImage->mt);
 147
 148    if (intelImage->base.Buffer) {
 149       _mesa_align_free(intelImage->base.Buffer);
 150       intelImage->base.Buffer = NULL;
 151    }
 152
 153    if (intelImage->base.ImageOffsets) {
 154       free(intelImage->base.ImageOffsets);
 155       intelImage->base.ImageOffsets = NULL;
 156    }
 157 }
 158
 159 /**
 160  * Map texture memory/buffer into user space.
 161  * Note: the region of interest parameters are ignored here.
 162  * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
 163  * \param mapOut  returns start of mapping of region of interest
 164  * \param rowStrideOut  returns row stride in bytes
 165  */
 166 static void
 167 intel_map_texture_image(struct gl_context *ctx,
 168                         struct gl_texture_image *tex_image,
 169                         GLuint slice,
 170                         GLuint x, GLuint y, GLuint w, GLuint h,
 171                         GLbitfield mode,
 172                         GLubyte **map,
 173                         GLint *stride)
 174 {
 175    struct intel_context *intel = intel_context(ctx);
 176    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 177    struct intel_mipmap_tree *mt = intel_image->mt;
 178
 179    /* Our texture data is always stored in a miptree. */
 180    assert(mt);
 181
 182    /* Check that our caller wasn't confused about how to map a 1D texture. */
 183    assert(tex_image->TexObject->Target != GL_TEXTURE_1D_ARRAY ||
 184           h == 1);
 185
 186    /* intel_miptree_map operates on a unified "slice" number that references the
 187     * cube face, since it's all just slices to the miptree code.
 188     */
 189    if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
 190       slice = tex_image->Face;
 191
 192    intel_miptree_map(intel, mt, tex_image->Level, slice, x, y, w, h, mode,
 193                      (void **)map, stride);
 194 }
 195
 196 static void
 197 intel_unmap_texture_image(struct gl_context *ctx,
 198                           struct gl_texture_image *tex_image, GLuint slice)
 199 {
 200    struct intel_context *intel = intel_context(ctx);
 201    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 202    struct intel_mipmap_tree *mt = intel_image->mt;
 203
 204    if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
 205       slice = tex_image->Face;
 206
 207    intel_miptree_unmap(intel, mt, tex_image->Level, slice);
 208 }
 209
 210 void
 211 intelInitTextureFuncs(struct dd_function_table *functions)
 212 {
 213    functions->NewTextureObject = intelNewTextureObject;
 214    functions->NewTextureImage = intelNewTextureImage;
 215    functions->DeleteTextureImage = intelDeleteTextureImage;
 216    functions->DeleteTexture = intelDeleteTextureObject;
 217    functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
 218    functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
 219    functions->AllocTextureStorage = intel_alloc_texture_storage;
 220    functions->MapTextureImage = intel_map_texture_image;
 221    functions->UnmapTextureImage = intel_unmap_texture_image;
 222 }