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_context *intel = intel_context(ctx);
  47    struct intel_texture_object *intelObj = intel_texture_object(texObj);
  48
  49    intel_miptree_release(intel, &intelObj->mt);
  50    _mesa_delete_texture_object(ctx, texObj);
  51 }
  52
  53
  54 static void
  55 intel_free_texture_image_buffer(struct gl_context * ctx,
  56                                 struct gl_texture_image *texImage)
  57 {
  58    struct intel_context *intel = intel_context(ctx);
  59    struct intel_texture_image *intelImage = intel_texture_image(texImage);
  60
  61    DBG("%s\n", __FUNCTION__);
  62
  63    intel_miptree_release(intel, &intelImage->mt);
  64
  65    if (texImage->Data) {
  66       _mesa_free_texmemory(texImage->Data);
  67       texImage->Data = NULL;
  68    }
  69
  70    _mesa_reference_renderbuffer(&intelImage->depth_rb, NULL);
  71    _mesa_reference_renderbuffer(&intelImage->stencil_rb, NULL);
  72 }
  73
  74 /**
  75  * Map texture memory/buffer into user space.
  76  * Note: the region of interest parameters are ignored here.
  77  * \param mapOut  returns start of mapping of region of interest
  78  * \param rowStrideOut  returns row stride in bytes
  79  */
  80 static void
  81 intel_map_texture_image(struct gl_context *ctx,
  82                         struct gl_texture_image *tex_image,
  83                         GLuint slice,
  84                         GLuint x, GLuint y, GLuint w, GLuint h,
  85                         GLbitfield mode,
  86                         GLubyte **map,
  87                         GLint *stride)
  88 {
  89    struct intel_context *intel = intel_context(ctx);
  90    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
  91    struct intel_mipmap_tree *mt = intel_image->mt;
  92    unsigned int bw, bh;
  93
  94    if (intel_image->stencil_rb) {
  95       /*
  96        * The texture has packed depth/stencil format, but uses separate
  97        * stencil. The texture's embedded stencil buffer contains the real
  98        * stencil data, so copy that into the miptree.
  99        */
 100       intel_tex_image_s8z24_gather(intel, intel_image);
 101    }
 102
 103    /* For compressed formats, the stride is the number of bytes per
 104     * row of blocks.  intel_miptree_get_image_offset() already does
 105     * the divide.
 106     */
 107    _mesa_get_format_block_size(tex_image->TexFormat, &bw, &bh);
 108    assert(y % bh == 0);
 109    y /= bh;
 110
 111    if (likely(mt)) {
 112       void *base = intel_region_map(intel, mt->region);
 113       unsigned int image_x, image_y;
 114
 115       intel_miptree_get_image_offset(mt, tex_image->Level, tex_image->Face,
 116                                      slice, &image_x, &image_y);
 117       x += image_x;
 118       y += image_y;
 119
 120       *stride = mt->region->pitch * mt->cpp;
 121       *map = base + y * *stride + x * mt->cpp;
 122    } else {
 123       /* texture data is in malloc'd memory */
 124       GLuint width = tex_image->Width;
 125       GLuint height = ALIGN(tex_image->Height, bh) / bh;
 126       GLuint texelSize = _mesa_get_format_bytes(tex_image->TexFormat);
 127
 128       assert(map);
 129
 130       *stride = _mesa_format_row_stride(tex_image->TexFormat, width);
 131       *map = tex_image->Data + (slice * height + y) * *stride + x * texelSize;
 132
 133       return;
 134    }
 135 }
 136
 137 static void
 138 intel_unmap_texture_image(struct gl_context *ctx,
 139                           struct gl_texture_image *tex_image, GLuint slice)
 140 {
 141    struct intel_context *intel = intel_context(ctx);
 142    struct intel_texture_image *intel_image = intel_texture_image(tex_image);
 143
 144    if (intel_image->mt)
 145       intel_region_unmap(intel, intel_image->mt->region);
 146
 147    if (intel_image->stencil_rb) {
 148       /*
 149        * The texture has packed depth/stencil format, but uses separate
 150        * stencil. The texture's embedded stencil buffer contains the real
 151        * stencil data, so copy that into the miptree.
 152        */
 153       intel_tex_image_s8z24_scatter(intel, intel_image);
 154    }
 155 }
 156
 157 /**
 158  * Called via ctx->Driver.GenerateMipmap()
 159  * This is basically a wrapper for _mesa_meta_GenerateMipmap() which checks
 160  * if we'll be using software mipmap generation.  In that case, we need to
 161  * map/unmap the base level texture image.
 162  */
 163 static void
 164 intelGenerateMipmap(struct gl_context *ctx, GLenum target,
 165                     struct gl_texture_object *texObj)
 166 {
 167    if (_mesa_meta_check_generate_mipmap_fallback(ctx, target, texObj)) {
 168       /* sw path: need to map texture images */
 169       struct intel_context *intel = intel_context(ctx);
 170       struct intel_texture_object *intelObj = intel_texture_object(texObj);
 171       struct gl_texture_image *first_image = texObj->Image[0][texObj->BaseLevel];
 172
 173       fallback_debug("%s - fallback to swrast\n", __FUNCTION__);
 174
 175       intel_tex_map_level_images(intel, intelObj, texObj->BaseLevel);
 176       _mesa_generate_mipmap(ctx, target, texObj);
 177       intel_tex_unmap_level_images(intel, intelObj, texObj->BaseLevel);
 178
 179       if (!_mesa_is_format_compressed(first_image->TexFormat)) {
 180          GLuint nr_faces = (texObj->Target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
 181          GLuint face, i;
 182          for (face = 0; face < nr_faces; face++) {
 183             for (i = texObj->BaseLevel + 1; i < texObj->MaxLevel; i++) {
 184                struct intel_texture_image *intelImage =
 185                   intel_texture_image(texObj->Image[face][i]);
 186                if (!intelImage)
 187                   break;
 188                /* Unreference the miptree to signal that the new Data is a
 189                 * bare pointer from mesa.
 190                 */
 191                intel_miptree_release(intel, &intelImage->mt);
 192             }
 193          }
 194       }
 195    }
 196    else {
 197       _mesa_meta_GenerateMipmap(ctx, target, texObj);
 198    }
 199 }
 200
 201
 202 void
 203 intelInitTextureFuncs(struct dd_function_table *functions)
 204 {
 205    functions->GenerateMipmap = intelGenerateMipmap;
 206
 207    functions->NewTextureObject = intelNewTextureObject;
 208    functions->NewTextureImage = intelNewTextureImage;
 209    functions->DeleteTextureImage = intelDeleteTextureImage;
 210    functions->DeleteTexture = intelDeleteTextureObject;
 211    functions->FreeTextureImageBuffer = intel_free_texture_image_buffer;
 212    functions->MapTextureImage = intel_map_texture_image;
 213    functions->UnmapTextureImage = intel_unmap_texture_image;
 214 }