src/mesa/state_tracker/st_pbo.h

   1 /*
   2  * Copyright 2016 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #ifndef ST_PBO_H
  25 #define ST_PBO_H
  26
  27 struct gl_pixelstore_attrib;
  28
  29 struct st_context;
  30
  31 struct st_pbo_addresses {
  32    int xoffset;
  33    int yoffset;
  34    unsigned width;
  35    unsigned height;
  36    unsigned depth;
  37
  38    unsigned bytes_per_pixel;
  39
  40    /* Everything below is filled in by st_pbo_from_pixelstore */
  41    unsigned pixels_per_row;
  42    unsigned image_height;
  43
  44    /* Everything below is filled in by st_pbo_setup_buffer */
  45
  46    /* Buffer and view. */
  47    struct pipe_resource *buffer; /* non-owning pointer */
  48    unsigned first_element;
  49    unsigned last_element;
  50
  51    /* Constant buffer for the fragment shader. */
  52    struct {
  53       int32_t xoffset;
  54       int32_t yoffset;
  55       int32_t stride;
  56       int32_t image_size;
  57       int32_t layer_offset;
  58    } constants;
  59 };
  60
  61 bool
  62 st_pbo_addresses_setup(struct st_context *st,
  63                        struct pipe_resource *buf, intptr_t buf_offset,
  64                        struct st_pbo_addresses *addr);
  65
  66 bool
  67 st_pbo_addresses_pixelstore(struct st_context *st,
  68                             GLenum gl_target, bool skip_images,
  69                             const struct gl_pixelstore_attrib *store,
  70                             const void *pixels,
  71                             struct st_pbo_addresses *addr);
  72
  73 void
  74 st_pbo_addresses_invert_y(struct st_pbo_addresses *addr,
  75                           unsigned viewport_height);
  76
  77 bool
  78 st_pbo_draw(struct st_context *st, const struct st_pbo_addresses *addr,
  79             unsigned surface_width, unsigned surface_height);
  80
  81 void *
  82 st_pbo_create_vs(struct st_context *st);
  83
  84 void *
  85 st_pbo_create_gs(struct st_context *st);
  86
  87 void *
  88 st_pbo_get_upload_fs(struct st_context *st,
  89                      enum pipe_format src_format,
  90                      enum pipe_format dst_format);
  91
  92 void *
  93 st_pbo_get_download_fs(struct st_context *st, enum pipe_texture_target target,
  94                        enum pipe_format src_format,
  95                        enum pipe_format dst_format);
  96
  97 extern void
  98 st_init_pbo_helpers(struct st_context *st);
  99
 100 extern void
 101 st_destroy_pbo_helpers(struct st_context *st);
 102
 103 #endif /* ST_PBO_H */