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      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 }
    223