src/mesa/state_tracker/st_pbo.c

   1 /*
   2  * Copyright 2007 VMware, Inc.
   3  * Copyright 2016 Advanced Micro Devices, Inc.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25 /**
  26  * \file
  27  *
  28  * Common helper functions for PBO up- and downloads.
  29  */
  30
  31 #include "state_tracker/st_context.h"
  32 #include "state_tracker/st_pbo.h"
  33
  34 #include "pipe/p_context.h"
  35 #include "pipe/p_defines.h"
  36 #include "pipe/p_screen.h"
  37 #include "cso_cache/cso_context.h"
  38
  39 void
  40 st_init_pbo_helpers(struct st_context *st)
  41 {
  42    struct pipe_context *pipe = st->pipe;
  43    struct pipe_screen *screen = pipe->screen;
  44
  45    st->pbo_upload.enabled =
  46       screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OBJECTS) &&
  47       screen->get_param(screen, PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT) >= 1 &&
  48       screen->get_shader_param(screen, PIPE_SHADER_FRAGMENT, PIPE_SHADER_CAP_INTEGERS);
  49    if (!st->pbo_upload.enabled)
  50       return;
  51
  52    st->pbo_upload.rgba_only =
  53       screen->get_param(screen, PIPE_CAP_BUFFER_SAMPLER_VIEW_RGBA_ONLY);
  54
  55    if (screen->get_param(screen, PIPE_CAP_TGSI_INSTANCEID)) {
  56       if (screen->get_param(screen, PIPE_CAP_TGSI_VS_LAYER_VIEWPORT)) {
  57          st->pbo_upload.upload_layers = true;
  58       } else if (screen->get_param(screen, PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES) >= 3) {
  59          st->pbo_upload.upload_layers = true;
  60          st->pbo_upload.use_gs = true;
  61       }
  62    }
  63
  64    /* Blend state */
  65    memset(&st->pbo_upload.blend, 0, sizeof(struct pipe_blend_state));
  66    st->pbo_upload.blend.rt[0].colormask = PIPE_MASK_RGBA;
  67
  68    /* Rasterizer state */
  69    memset(&st->pbo_upload.raster, 0, sizeof(struct pipe_rasterizer_state));
  70    st->pbo_upload.raster.half_pixel_center = 1;
  71 }
  72
  73 void
  74 st_destroy_pbo_helpers(struct st_context *st)
  75 {
  76    if (st->pbo_upload.fs) {
  77       cso_delete_fragment_shader(st->cso_context, st->pbo_upload.fs);
  78       st->pbo_upload.fs = NULL;
  79    }
  80
  81    if (st->pbo_upload.gs) {
  82       cso_delete_geometry_shader(st->cso_context, st->pbo_upload.gs);
  83       st->pbo_upload.gs = NULL;
  84    }
  85
  86    if (st->pbo_upload.vs) {
  87       cso_delete_vertex_shader(st->cso_context, st->pbo_upload.vs);
  88       st->pbo_upload.vs = NULL;
  89    }
  90 }