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      1 /**************************************************************************
      2  *
      3  * Copyright 2003 VMware, Inc.
      4  * All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * The above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
     22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25  *
     26  **************************************************************************/
     27 
     28 #include "main/mtypes.h"
     29 #include "main/enums.h"
     30 #include "main/image.h"
     31 #include "main/teximage.h"
     32 #include "main/texstate.h"
     33 #include "main/fbobject.h"
     34 
     35 #include "drivers/common/meta.h"
     36 
     37 #include "intel_screen.h"
     38 #include "intel_context.h"
     39 #include "intel_mipmap_tree.h"
     40 #include "intel_regions.h"
     41 #include "intel_fbo.h"
     42 #include "intel_tex.h"
     43 #include "intel_blit.h"
     44 
     45 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
     46 
     47 
     48 static bool
     49 intel_copy_texsubimage(struct intel_context *intel,
     50                        struct intel_texture_image *intelImage,
     51                        GLint dstx, GLint dsty, GLint slice,
     52                        struct intel_renderbuffer *irb,
     53                        GLint x, GLint y, GLsizei width, GLsizei height)
     54 {
     55    const GLenum internalFormat = intelImage->base.Base.InternalFormat;
     56 
     57    intel_prepare_render(intel);
     58 
     59    if (!intelImage->mt || !irb || !irb->mt) {
     60       if (unlikely(INTEL_DEBUG & DEBUG_PERF))
     61 	 fprintf(stderr, "%s fail %p %p (0x%08x)\n",
     62 		 __func__, intelImage->mt, irb, internalFormat);
     63       return false;
     64    }
     65 
     66    /* blit from src buffer to texture */
     67    if (!intel_miptree_blit(intel,
     68                            irb->mt, irb->mt_level, irb->mt_layer,
     69                            x, y, irb->Base.Base.Name == 0,
     70                            intelImage->mt, intelImage->base.Base.Level,
     71                            intelImage->base.Base.Face + slice,
     72                            dstx, dsty, false,
     73                            width, height, GL_COPY)) {
     74       return false;
     75    }
     76 
     77    return true;
     78 }
     79 
     80 
     81 static void
     82 intelCopyTexSubImage(struct gl_context *ctx, GLuint dims,
     83                      struct gl_texture_image *texImage,
     84                      GLint xoffset, GLint yoffset, GLint slice,
     85                      struct gl_renderbuffer *rb,
     86                      GLint x, GLint y,
     87                      GLsizei width, GLsizei height)
     88 {
     89    struct intel_context *intel = intel_context(ctx);
     90 
     91    /* Try the BLT engine. */
     92    if (intel_copy_texsubimage(intel,
     93                               intel_texture_image(texImage),
     94                               xoffset, yoffset, slice,
     95                               intel_renderbuffer(rb), x, y, width, height)) {
     96       return;
     97    }
     98 
     99    /* Otherwise, fall back to meta.  This will likely be slow. */
    100    perf_debug("%s - fallback to swrast\n", __func__);
    101    _mesa_meta_CopyTexSubImage(ctx, dims, texImage,
    102                               xoffset, yoffset, slice,
    103                               rb, x, y, width, height);
    104 }
    105 
    106 
    107 void
    108 intelInitTextureCopyImageFuncs(struct dd_function_table *functions)
    109 {
    110    functions->CopyTexSubImage = intelCopyTexSubImage;
    111 }
    112