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