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