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