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    /* 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    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           width, height, 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           width, height, depth, intel_image->mt);
 108    }
 109
 110    return true;
 111 }
 112
 113 static void
 114 intel_free_texture_image_buffer(struct gl_context * ctx,
 115                                 struct gl_texture_image *texImage)
 116 {
 117    struct intel_texture_image *intelImage = intel_texture_image(texImage);
 118
 119    DBG("%s\n", __FUNCTION__);
 120
 121    intel_miptree_release(&intelImage->mt);
 122
 123    if (intelImage->base.Buffer) {
 124       _mesa_align_free(intelImage->base.Buffer);
 125       intelImage->base.Buffer = NULL;
 126    }
 127
 128    if (intelImage->base.ImageOffsets) {
 129       free(intelImage->base.ImageOffsets);
 130       intelImage->base.ImageOffsets = NULL;
 131    }
 132 }
 133
 134 /**
 135  * Map texture memory/buffer into user space.
 136  * Note: the region of interest parameters are ignored here.
 137  * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
 138  * \param mapOut  returns start of mapping of region of interest
 139  * \param rowStrideOut  returns row stride in bytes
 140  */
 141 static void
 142 intel_map_texture_image(struct gl_context *ctx,
 143                         struct gl_texture_image *tex_image,
 144                         GLuint slice,
 145                         GLuint x, GLuint y, GLuint w, GLuint h,
 146                         GLbitfield mode,
 147                         GLubyte **map,
 148                         GLint *stride)
 149 {
 150    struct intel_context *intel = intel_context(ctx);
 151    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 152    struct intel_mipmap_tree *mt = intel_image->mt;
 153    unsigned int bw, bh;
 154    void *base;
 155    unsigned int image_x, image_y;
 156
 157    /* Our texture data is always stored in a miptree. */
 158    assert(mt);
 159
 160    /* Check that our caller wasn't confused about how to map a 1D texture. */
 161    assert(tex_image->TexObject->Target != GL_TEXTURE_1D_ARRAY ||
 162           h == 1);
 163
 164    if (mt->stencil_mt) {
 165       /* The miptree has depthstencil format, but uses separate stencil. The
 166        * embedded stencil miptree contains the real stencil data, so gather
 167        * that into the depthstencil miptree.
 168        *
 169        * FIXME: Avoid the gather if the texture is mapped as write-only.
 170        */
 171       intel_miptree_s8z24_gather(intel, mt, tex_image->Level, slice);
 172    }
 173
 174    intel_miptree_slice_resolve_depth(intel, mt, tex_image->Level, slice);
 175    if (mode & GL_MAP_WRITE_BIT) {
 176       intel_miptree_slice_set_needs_hiz_resolve(mt, tex_image->Level, slice);
 177    }
 178
 179    /* For compressed formats, the stride is the number of bytes per
 180     * row of blocks.  intel_miptree_get_image_offset() already does
 181     * the divide.
 182     */
 183    _mesa_get_format_block_size(tex_image->TexFormat, &bw, &bh);
 184    assert(y % bh == 0);
 185    y /= bh;
 186
 187    base = intel_region_map(intel, mt->region, mode);
 188    intel_miptree_get_image_offset(mt, tex_image->Level, tex_image->Face,
 189                                   slice, &image_x, &image_y);
 190    x += image_x;
 191    y += image_y;
 192
 193    *stride = mt->region->pitch * mt->cpp;
 194    *map = base + y * *stride + x * mt->cpp;
 195
 196    DBG("%s: %d,%d %dx%d from mt %p %d,%d = %p/%d\n", __FUNCTION__,
 197        x - image_x, y - image_y, w, h,
 198        mt, x, y, *map, *stride);
 199 }
 200
 201 static void
 202 intel_unmap_texture_image(struct gl_context *ctx,
 203                           struct gl_texture_image *tex_image, GLuint slice)
 204 {
 205    struct intel_context *intel = intel_context(ctx);
 206    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 207    struct intel_mipmap_tree *mt = intel_image->mt;
 208
 209    intel_region_unmap(intel, intel_image->mt->region);
 210
 211    if (mt->stencil_mt) {
 212       /* The miptree has depthstencil format, but uses separate stencil. The
 213        * embedded stencil miptree must contain the real stencil data after
 214        * unmapping, so copy it from the depthstencil miptree into the stencil
 215        * miptree.
 216        *
 217        * FIXME: Avoid the scatter if the texture was mapped as read-only.
 218        */
 219       intel_miptree_s8z24_scatter(intel, mt, tex_image->Level, slice);
 220    }
 221 }
 222
 223 void
 224 intelInitTextureFuncs(struct dd_function_table *functions)
 225 {
 226    functions->NewTextureObject = intelNewTextureObject;
 227    functions->NewTextureImage = intelNewTextureImage;
 228    functions->DeleteTextureImage = intelDeleteTextureImage;
 229    functions->DeleteTexture = intelDeleteTextureObject;
 230    functions->AllocTextureImageBuffer = intel_alloc_texture_image_buffer;
 231    functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
 232    functions->MapTextureImage = intel_map_texture_image;
 233    functions->UnmapTextureImage = intel_unmap_texture_image;
 234 }