intel_tex_image.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

      DBG("release it\n");
      intel_miptree_release(intel, &intelObj->mt);
      assert(!intelObj->mt);
   }

   if (!intelObj->mt) {
      guess_and_alloc_mipmap_tree(intel, intelObj, intelImage);
      if (!intelObj->mt) {
	 DBG("guess_and_alloc_mipmap_tree: failed\n");
      }
   }

   assert(!intelImage->mt);

   if (intelObj->mt &&
       intel_miptree_match_image(intelObj->mt, &intelImage->base,
                                 intelImage->face, intelImage->level)) {

      intel_miptree_reference(&intelImage->mt, intelObj->mt);
      assert(intelImage->mt);
   }

   if (!intelImage->mt)
      DBG("XXX: Image did not fit into tree - storing in local memory!\n");

   /* PBO fastpaths:
    */
   if (dims <= 2 &&
       intelImage->mt &&
       intel_buffer_object(unpack->BufferObj) &&
       check_pbo_format(internalFormat, format,
                        type, intelImage->base.TexFormat)) {

      DBG("trying pbo upload\n");

      /* Attempt to texture directly from PBO data (zero copy upload).
       *
       * Currently disable as it can lead to worse as well as better
       * performance (in particular when intel_region_cow() is
       * required).
       */
      if (intelObj->mt == intelImage->mt &&
          intelObj->mt->first_level == level &&
          intelObj->mt->last_level == level) {

         if (try_pbo_zcopy(intel, intelImage, unpack,
                           internalFormat,
                           width, height, format, type, pixels)) {

            DBG("pbo zcopy upload succeeded\n");
            return;
         }
      }


      /* Otherwise, attempt to use the blitter for PBO image uploads.
       */
      if (try_pbo_upload(intel, intelImage, unpack,
                         internalFormat,
                         width, height, format, type, pixels)) {
         DBG("pbo upload succeeded\n");
         return;
      }

      DBG("pbo upload failed\n");
   }



   /* intelCopyTexImage calls this function with pixels == NULL, with
    * the expectation that the mipmap tree will be set up but nothing
    * more will be done.  This is where those calls return:
    */
   if (compressed) {
      pixels = _mesa_validate_pbo_compressed_teximage(ctx, imageSize, pixels,
						      unpack,
						      "glCompressedTexImage");
   } else {
      pixels = _mesa_validate_pbo_teximage(ctx, dims, width, height, 1,
					   format, type,
					   pixels, unpack, "glTexImage");
   }

   LOCK_HARDWARE(intel);

   if (intelImage->mt) {
      texImage->Data = intel_miptree_image_map(intel,
                                               intelImage->mt,
                                               intelImage->face,
                                               intelImage->level,
                                               &dstRowStride,
                                               intelImage->base.ImageOffsets);
      texImage->RowStride = dstRowStride / intelImage->mt->cpp;
   }
   else {
      /* Allocate regular memory and store the image there temporarily.   */
      if (texImage->IsCompressed) {
         sizeInBytes = texImage->CompressedSize;
         dstRowStride =
            _mesa_compressed_row_stride(texImage->TexFormat->MesaFormat, width);
         assert(dims != 3);
      }
      else {
         dstRowStride = postConvWidth * texelBytes;
         sizeInBytes = depth * dstRowStride * postConvHeight;
      }

      texImage->Data = _mesa_alloc_texmemory(sizeInBytes);
   }

   DBG("Upload image %dx%dx%d row_len %d "
       "pitch %d\n",
       width, height, depth, width * texelBytes, dstRowStride);

   /* Copy data.  Would like to know when it's ok for us to eg. use
    * the blitter to copy.  Or, use the hardware to do the format
    * conversion and copy:
    */
   if (pixels) {
       if (compressed) {
	   if (intelImage->mt) {
	       struct intel_region *dst = intelImage->mt->region;
	       _mesa_copy_rect(texImage->Data, dst->cpp, dst->pitch,
			       0, 0,
			       intelImage->mt->level[level].width,
			       intelImage->mt->level[level].height/4,
			       pixels,
			       srcRowStride,
			       0, 0);
	   } else
	       memcpy(texImage->Data, pixels, imageSize);
       } else if (!texImage->TexFormat->StoreImage(ctx, dims, 
						   texImage->_BaseFormat, 
						   texImage->TexFormat, 
						   texImage->Data, 0, 0, 0, /* dstX/Y/Zoffset */
						   dstRowStride,
						   texImage->ImageOffsets,
						   width, height, depth,
						   format, type, pixels, unpack)) {
	   _mesa_error(ctx, GL_OUT_OF_MEMORY, "glTexImage");
       }
   }

   /* GL_SGIS_generate_mipmap */
   if (level == texObj->BaseLevel && texObj->GenerateMipmap) {
      intel_generate_mipmap(ctx, target, texObj);
   }

   _mesa_unmap_teximage_pbo(ctx, unpack);

   if (intelImage->mt) {
      intel_miptree_image_unmap(intel, intelImage->mt);
      texImage->Data = NULL;
   }

   UNLOCK_HARDWARE(intel);
}

void
intelTexImage3D(GLcontext * ctx,
                GLenum target, GLint level,
                GLint internalFormat,
                GLint width, GLint height, GLint depth,
                GLint border,
                GLenum format, GLenum type, const void *pixels,
                const struct gl_pixelstore_attrib *unpack,
                struct gl_texture_object *texObj,
                struct gl_texture_image *texImage)
{
   intelTexImage(ctx, 3, target, level,
                 internalFormat, width, height, depth, border,
                 format, type, pixels, unpack, texObj, texImage, 0, 0);
}


void
intelTexImage2D(GLcontext * ctx,
                GLenum target, GLint level,
                GLint internalFormat,
                GLint width, GLint height, GLint border,
                GLenum format, GLenum type, const void *pixels,
                const struct gl_pixelstore_attrib *unpack,
                struct gl_texture_object *texObj,
                struct gl_texture_image *texImage)
{
   intelTexImage(ctx, 2, target, level,
                 internalFormat, width, height, 1, border,
                 format, type, pixels, unpack, texObj, texImage, 0, 0);
}

void
intelTexImage1D(GLcontext * ctx,
                GLenum target, GLint level,
                GLint internalFormat,
                GLint width, GLint border,
                GLenum format, GLenum type, const void *pixels,
                const struct gl_pixelstore_attrib *unpack,
                struct gl_texture_object *texObj,
                struct gl_texture_image *texImage)
{
   intelTexImage(ctx, 1, target, level,
                 internalFormat, width, 1, 1, border,
                 format, type, pixels, unpack, texObj, texImage, 0, 0);
}

void intelCompressedTexImage2D( GLcontext *ctx, GLenum target, GLint level,
				GLint internalFormat,
				GLint width, GLint height, GLint border,
				GLsizei imageSize, const GLvoid *data,
				struct gl_texture_object *texObj,
				struct gl_texture_image *texImage )
{
   intelTexImage(ctx, 2, target, level,
		 internalFormat, width, height, 1, border,
		 0, 0, data, &ctx->Unpack, texObj, texImage, imageSize, 1);
}

/**
 * Need to map texture image into memory before copying image data,
 * then unmap it.
 */
static void
intel_get_tex_image(GLcontext * ctx, GLenum target, GLint level,
		    GLenum format, GLenum type, GLvoid * pixels,
		    struct gl_texture_object *texObj,
		    struct gl_texture_image *texImage, int compressed)
{
   struct intel_context *intel = intel_context(ctx);
   struct intel_texture_image *intelImage = intel_texture_image(texImage);

   /* Map */
   if (intelImage->mt) {
      /* Image is stored in hardware format in a buffer managed by the
       * kernel.  Need to explicitly map and unmap it.
       */
      intelImage->base.Data =
         intel_miptree_image_map(intel,
                                 intelImage->mt,
                                 intelImage->face,
                                 intelImage->level,
                                 &intelImage->base.RowStride,
                                 intelImage->base.ImageOffsets);
      intelImage->base.RowStride /= intelImage->mt->cpp;
   }
   else {
      /* Otherwise, the image should actually be stored in
       * intelImage->base.Data.  This is pretty confusing for
       * everybody, I'd much prefer to separate the two functions of
       * texImage->Data - storage for texture images in main memory
       * and access (ie mappings) of images.  In other words, we'd
       * create a new texImage->Map field and leave Data simply for
       * storage.
       */
      assert(intelImage->base.Data);
   }


   if (compressed) {
      _mesa_get_compressed_teximage(ctx, target, level, pixels,
				    texObj, texImage);
   } else {
      _mesa_get_teximage(ctx, target, level, format, type, pixels,
			 texObj, texImage);
   }
     

   /* Unmap */
   if (intelImage->mt) {
      intel_miptree_image_unmap(intel, intelImage->mt);
      intelImage->base.Data = NULL;
   }
}

void
intelGetTexImage(GLcontext * ctx, GLenum target, GLint level,
                 GLenum format, GLenum type, GLvoid * pixels,
                 struct gl_texture_object *texObj,
                 struct gl_texture_image *texImage)
{
   intel_get_tex_image(ctx, target, level, format, type, pixels,
		       texObj, texImage, 0);


}

void
intelGetCompressedTexImage(GLcontext *ctx, GLenum target, GLint level,
			   GLvoid *pixels,
			   struct gl_texture_object *texObj,
			   struct gl_texture_image *texImage)
{
   intel_get_tex_image(ctx, target, level, 0, 0, pixels,
		       texObj, texImage, 1);
}

void
intelSetTexOffset(__DRIcontext *pDRICtx, GLint texname,
		  unsigned long long offset, GLint depth, GLuint pitch)
{
   struct intel_context *intel = pDRICtx->driverPrivate;
   struct gl_texture_object *tObj = _mesa_lookup_texture(&intel->ctx, texname);
   struct intel_texture_object *intelObj = intel_texture_object(tObj);

   if (!intelObj)
      return;

   if (intelObj->mt)
      intel_miptree_release(intel, &intelObj->mt);

   intelObj->imageOverride = GL_TRUE;
   intelObj->depthOverride = depth;
   intelObj->pitchOverride = pitch;

   if (offset)
      intelObj->textureOffset = offset;
}

void
intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *dPriv)
{
   struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
   struct intel_context *intel = pDRICtx->driverPrivate;
   struct intel_texture_object *intelObj;
   struct intel_texture_image *intelImage;
   struct intel_mipmap_tree *mt;
   struct intel_renderbuffer *rb;
   struct gl_texture_unit *texUnit;
   struct gl_texture_object *texObj;
   struct gl_texture_image *texImage;
   int level = 0, type, format, internalFormat;

   texUnit = &intel->ctx.Texture.Unit[intel->ctx.Texture.CurrentUnit];
   texObj = _mesa_select_tex_object(&intel->ctx, texUnit, target);
   intelObj = intel_texture_object(texObj);

   if (!intelObj)
      return;

   __driParseEvents(pDRICtx, dPriv);

   rb = intel_fb->color_rb[0];
   type = GL_BGRA;
   format = GL_UNSIGNED_BYTE;
   internalFormat = (rb->region->cpp == 3 ? 3 : 4);

   mt = intel_miptree_create_for_region(intel, target,
					internalFormat,
					0, 0, rb->region, 1, 0);
   if (mt == NULL)
       return;

   _mesa_lock_texture(&intel->ctx, texObj);

   if (intelObj->mt)
      intel_miptree_release(intel, &intelObj->mt);

   intelObj->mt = mt;
   texImage = _mesa_get_tex_image(&intel->ctx, texObj, target, level);
   _mesa_init_teximage_fields(&intel->ctx, target, texImage,
			      rb->region->pitch, rb->region->height, 1,
			      0, internalFormat);

   intelImage = intel_texture_image(texImage);
   intelImage->face = target_to_face(target);
   intelImage->level = level;
   texImage->TexFormat = intelChooseTextureFormat(&intel->ctx, internalFormat,
                                                  type, format);
   _mesa_set_fetch_functions(texImage, 2);
   texImage->RowStride = rb->region->pitch;
   intel_miptree_reference(&intelImage->mt, intelObj->mt);

   if (!intel_miptree_match_image(intelObj->mt, &intelImage->base,
				  intelImage->face, intelImage->level)) {
	   fprintf(stderr, "miptree doesn't match image\n");
   }

   _mesa_unlock_texture(&intel->ctx, texObj);
}