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    obj->needs_validate = true;
  40
  41    return &obj->base;
  42 }
  43
  44 static void
  45 intelDeleteTextureObject(struct gl_context *ctx,
  46                          struct gl_texture_object *texObj)
  47 {
  48    struct intel_texture_object *intelObj = intel_texture_object(texObj);
  49
  50    intel_miptree_release(&intelObj->mt);
  51    _mesa_delete_texture_object(ctx, texObj);
  52 }
  53
  54 static GLboolean
  55 intel_alloc_texture_image_buffer(struct gl_context *ctx,
  56                                  struct gl_texture_image *image)
  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    /* Allocate the swrast_texture_image::ImageOffsets array now */
  73    switch (texobj->Target) {
  74    case GL_TEXTURE_3D:
  75    case GL_TEXTURE_2D_ARRAY:
  76       slices = image->Depth;
  77       break;
  78    case GL_TEXTURE_1D_ARRAY:
  79       slices = image->Height;
  80       break;
  81    default:
  82       slices = 1;
  83    }
  84    assert(!intel_image->base.ImageOffsets);
  85    intel_image->base.ImageOffsets = malloc(slices * sizeof(GLuint));
  86
  87    _swrast_init_texture_image(image);
  88
  89    if (intel_texobj->mt &&
  90        intel_miptree_match_image(intel_texobj->mt, image)) {
  91       intel_miptree_reference(&intel_image->mt, intel_texobj->mt);
  92       DBG("%s: alloc obj %p level %d %dx%dx%d using object's miptree %p\n",
  93           __FUNCTION__, texobj, image->Level,
  94           image->Width, image->Height, image->Depth, intel_texobj->mt);
  95    } else {
  96       intel_image->mt = intel_miptree_create_for_teximage(intel, intel_texobj,
  97                                                           intel_image,
  98                                                           false);
  99
 100       /* Even if the object currently has a mipmap tree associated
 101        * with it, this one is a more likely candidate to represent the
 102        * whole object since our level didn't fit what was there
 103        * before, and any lower levels would fit into our miptree.
 104        */
 105       intel_miptree_reference(&intel_texobj->mt, intel_image->mt);
 106
 107       DBG("%s: alloc obj %p level %d %dx%dx%d using new miptree %p\n",
 108           __FUNCTION__, texobj, image->Level,
 109           image->Width, image->Height, image->Depth, intel_image->mt);
 110    }
 111
 112    intel_texobj->needs_validate = true;
 113
 114    return true;
 115 }
 116
 117 /**
 118  * Called via ctx->Driver.AllocTextureStorage()
 119  * Just have to allocate memory for the texture images.
 120  */
 121 static GLboolean
 122 intel_alloc_texture_storage(struct gl_context *ctx,
 123                             struct gl_texture_object *texObj,
 124                             GLsizei levels, GLsizei width,
 125                             GLsizei height, GLsizei depth)
 126 {
 127    const int numFaces = _mesa_num_tex_faces(texObj->Target);
 128    int face;
 129    int level;
 130
 131    for (face = 0; face < numFaces; face++) {
 132       for (level = 0; level < levels; level++) {
 133          struct gl_texture_image *const texImage = texObj->Image[face][level];
 134          if (!intel_alloc_texture_image_buffer(ctx, texImage))
 135             return false;
 136       }
 137    }
 138
 139    return true;
 140 }
 141
 142 static void
 143 intel_free_texture_image_buffer(struct gl_context * ctx,
 144                                 struct gl_texture_image *texImage)
 145 {
 146    struct intel_texture_image *intelImage = intel_texture_image(texImage);
 147
 148    DBG("%s\n", __FUNCTION__);
 149
 150    intel_miptree_release(&intelImage->mt);
 151
 152    if (intelImage->base.Buffer) {
 153       _mesa_align_free(intelImage->base.Buffer);
 154       intelImage->base.Buffer = NULL;
 155    }
 156
 157    free(intelImage->base.ImageOffsets);
 158    intelImage->base.ImageOffsets = NULL;
 159 }
 160
 161 /**
 162  * Map texture memory/buffer into user space.
 163  * Note: the region of interest parameters are ignored here.
 164  * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
 165  * \param mapOut  returns start of mapping of region of interest
 166  * \param rowStrideOut  returns row stride in bytes
 167  */
 168 static void
 169 intel_map_texture_image(struct gl_context *ctx,
 170                         struct gl_texture_image *tex_image,
 171                         GLuint slice,
 172                         GLuint x, GLuint y, GLuint w, GLuint h,
 173                         GLbitfield mode,
 174                         GLubyte **map,
 175                         GLint *stride)
 176 {
 177    struct intel_context *intel = intel_context(ctx);
 178    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 179    struct intel_mipmap_tree *mt = intel_image->mt;
 180
 181    /* Our texture data is always stored in a miptree. */
 182    assert(mt);
 183
 184    /* Check that our caller wasn't confused about how to map a 1D texture. */
 185    assert(tex_image->TexObject->Target != GL_TEXTURE_1D_ARRAY ||
 186           h == 1);
 187
 188    /* intel_miptree_map operates on a unified "slice" number that references the
 189     * cube face, since it's all just slices to the miptree code.
 190     */
 191    if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
 192       slice = tex_image->Face;
 193
 194    intel_miptree_map(intel, mt, tex_image->Level, slice, x, y, w, h, mode,
 195                      (void **)map, stride);
 196 }
 197
 198 static void
 199 intel_unmap_texture_image(struct gl_context *ctx,
 200                           struct gl_texture_image *tex_image, GLuint slice)
 201 {
 202    struct intel_context *intel = intel_context(ctx);
 203    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 204    struct intel_mipmap_tree *mt = intel_image->mt;
 205
 206    if (tex_image->TexObject->Target == GL_TEXTURE_CUBE_MAP)
 207       slice = tex_image->Face;
 208
 209    intel_miptree_unmap(intel, mt, tex_image->Level, slice);
 210 }
 211
 212 void
 213 intelInitTextureFuncs(struct dd_function_table *functions)
 214 {
 215    functions->NewTextureObject = intelNewTextureObject;
 216    functions->NewTextureImage = intelNewTextureImage;
 217    functions->DeleteTextureImage = intelDeleteTextureImage;
 218    functions->DeleteTexture = intelDeleteTextureObject;
 219    functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
 220    functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
 221    functions->AllocTextureStorage = intel_alloc_texture_storage;
 222    functions->MapTextureImage = intel_map_texture_image;
 223    functions->UnmapTextureImage = intel_unmap_texture_image;
 224 }