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      1 /*
      2  * Copyright 2003 VMware, Inc.
      3  * All Rights Reserved.
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a
      6  * copy of this software and associated documentation files (the
      7  * "Software"), to deal in the Software without restriction, including
      8  * without limitation the rights to use, copy, modify, merge, publish,
      9  * distribute, sublicense, and/or sell copies of the Software, and to
     10  * permit persons to whom the Software is furnished to do so, subject to
     11  * the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the
     14  * next paragraph) shall be included in all copies or substantial portions
     15  * of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
     20  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
     21  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     22  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     23  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     24  */
     25 
     26 #include "main/mtypes.h"
     27 #include "main/enums.h"
     28 #include "main/image.h"
     29 #include "main/teximage.h"
     30 #include "main/texobj.h"
     31 #include "main/texstate.h"
     32 #include "main/fbobject.h"
     33 
     34 #include "drivers/common/meta.h"
     35 
     36 #include "intel_screen.h"
     37 #include "intel_mipmap_tree.h"
     38 #include "intel_fbo.h"
     39 #include "intel_tex.h"
     40 #include "intel_blit.h"
     41 #include "brw_context.h"
     42 
     43 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
     44 
     45 
     46 static bool
     47 intel_copy_texsubimage(struct brw_context *brw,
     48                        struct intel_texture_image *intelImage,
     49                        GLint dstx, GLint dsty, GLint slice,
     50                        struct intel_renderbuffer *irb,
     51                        GLint x, GLint y, GLsizei width, GLsizei height)
     52 {
     53    const GLenum internalFormat = intelImage->base.Base.InternalFormat;
     54 
     55    if (!intelImage->mt || !irb || !irb->mt) {
     56       if (unlikely(INTEL_DEBUG & DEBUG_PERF))
     57 	 fprintf(stderr, "%s fail %p %p (0x%08x)\n",
     58 		 __func__, intelImage->mt, irb, internalFormat);
     59       return false;
     60    }
     61 
     62    /* No pixel transfer operations (zoom, bias, mapping), just a blit */
     63    if (brw->ctx._ImageTransferState)
     64       return false;
     65 
     66    intel_prepare_render(brw);
     67 
     68    /* glCopyTexSubImage() can be called on a multisampled renderbuffer (if
     69     * that renderbuffer is associated with the window system framebuffer),
     70     * however the hardware blitter can't handle this case, so fall back to
     71     * meta (which can, since it uses ReadPixels).
     72     */
     73    if (irb->Base.Base.NumSamples != 0)
     74       return false;
     75 
     76    /* glCopyTexSubImage() can't be called on a multisampled texture. */
     77    assert(intelImage->base.Base.NumSamples == 0);
     78 
     79    /* account for view parameters and face index */
     80    int dst_level = intelImage->base.Base.Level +
     81                    intelImage->base.Base.TexObject->MinLevel;
     82    int dst_slice = slice + intelImage->base.Base.Face +
     83                    intelImage->base.Base.TexObject->MinLayer;
     84 
     85    /* blit from src buffer to texture */
     86    return intel_miptree_blit(brw,
     87                              irb->mt, irb->mt_level, irb->mt_layer,
     88                              x, y, irb->Base.Base.Name == 0,
     89                              intelImage->mt, dst_level, dst_slice,
     90                              dstx, dsty, false,
     91                              width, height, GL_COPY);
     92 }
     93 
     94 
     95 static void
     96 intelCopyTexSubImage(struct gl_context *ctx, GLuint dims,
     97                      struct gl_texture_image *texImage,
     98                      GLint xoffset, GLint yoffset, GLint slice,
     99                      struct gl_renderbuffer *rb,
    100                      GLint x, GLint y,
    101                      GLsizei width, GLsizei height)
    102 {
    103    struct brw_context *brw = brw_context(ctx);
    104 
    105    /* Try BLORP first.  It can handle almost everything. */
    106    if (brw_blorp_copytexsubimage(brw, rb, texImage, slice, x, y,
    107                                  xoffset, yoffset, width, height))
    108       return;
    109 
    110    /* Next, try the BLT engine. */
    111    if (intel_copy_texsubimage(brw,
    112                               intel_texture_image(texImage),
    113                               xoffset, yoffset, slice,
    114                               intel_renderbuffer(rb), x, y, width, height)) {
    115       return;
    116    }
    117 
    118    /* Finally, fall back to meta.  This will likely be slow. */
    119    perf_debug("%s - fallback to swrast\n", __func__);
    120    _mesa_meta_CopyTexSubImage(ctx, dims, texImage,
    121                               xoffset, yoffset, slice,
    122                               rb, x, y, width, height);
    123 }
    124 
    125 
    126 void
    127 intelInitTextureCopyImageFuncs(struct dd_function_table *functions)
    128 {
    129    functions->CopyTexSubImage = intelCopyTexSubImage;
    130 }
    131