src/mesa/state_tracker/st_atom_image.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2016 Ilia Mirkin. 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, sub license, 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 NON-INFRINGEMENT.
  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
  27 #include "main/imports.h"
  28 #include "main/shaderimage.h"
  29 #include "program/prog_parameter.h"
  30 #include "program/prog_print.h"
  31 #include "compiler/glsl/ir_uniform.h"
  32
  33 #include "pipe/p_context.h"
  34 #include "pipe/p_defines.h"
  35 #include "util/u_inlines.h"
  36 #include "util/u_surface.h"
  37 #include "cso_cache/cso_context.h"
  38
  39 #include "st_cb_bufferobjects.h"
  40 #include "st_cb_texture.h"
  41 #include "st_debug.h"
  42 #include "st_texture.h"
  43 #include "st_context.h"
  44 #include "st_atom.h"
  45 #include "st_program.h"
  46 #include "st_format.h"
  47
  48 /**
  49  * Convert a gl_image_unit object to a pipe_image_view object.
  50  */
  51 void
  52 st_convert_image(const struct st_context *st, const struct gl_image_unit *u,
  53                  struct pipe_image_view *img)
  54 {
  55    struct st_texture_object *stObj = st_texture_object(u->TexObj);
  56
  57    img->format = st_mesa_format_to_pipe_format(st, u->_ActualFormat);
  58
  59    switch (u->Access) {
  60    case GL_READ_ONLY:
  61       img->access = PIPE_IMAGE_ACCESS_READ;
  62       break;
  63    case GL_WRITE_ONLY:
  64       img->access = PIPE_IMAGE_ACCESS_WRITE;
  65       break;
  66    case GL_READ_WRITE:
  67       img->access = PIPE_IMAGE_ACCESS_READ_WRITE;
  68       break;
  69    default:
  70       unreachable("bad gl_image_unit::Access");
  71    }
  72
  73    if (stObj->base.Target == GL_TEXTURE_BUFFER) {
  74       struct st_buffer_object *stbuf =
  75          st_buffer_object(stObj->base.BufferObject);
  76       unsigned base, size;
  77
  78       if (!stbuf || !stbuf->buffer) {
  79          memset(img, 0, sizeof(*img));
  80          return;
  81       }
  82       struct pipe_resource *buf = stbuf->buffer;
  83
  84       base = stObj->base.BufferOffset;
  85       assert(base < buf->width0);
  86       size = MIN2(buf->width0 - base, (unsigned)stObj->base.BufferSize);
  87
  88       img->resource = stbuf->buffer;
  89       img->u.buf.offset = base;
  90       img->u.buf.size = size;
  91    } else {
  92       if (!st_finalize_texture(st->ctx, st->pipe, u->TexObj, 0) ||
  93           !stObj->pt) {
  94          memset(img, 0, sizeof(*img));
  95          return;
  96       }
  97
  98       img->resource = stObj->pt;
  99       img->u.tex.level = u->Level + stObj->base.MinLevel;
 100       if (stObj->pt->target == PIPE_TEXTURE_3D) {
 101          if (u->Layered) {
 102             img->u.tex.first_layer = 0;
 103             img->u.tex.last_layer = u_minify(stObj->pt->depth0, img->u.tex.level) - 1;
 104          } else {
 105             img->u.tex.first_layer = u->_Layer;
 106             img->u.tex.last_layer = u->_Layer;
 107          }
 108       } else {
 109          img->u.tex.first_layer = u->_Layer + stObj->base.MinLayer;
 110          img->u.tex.last_layer = u->_Layer + stObj->base.MinLayer;
 111          if (u->Layered && img->resource->array_size > 1) {
 112             if (stObj->base.Immutable)
 113                img->u.tex.last_layer += stObj->base.NumLayers - 1;
 114             else
 115                img->u.tex.last_layer += img->resource->array_size - 1;
 116          }
 117       }
 118    }
 119 }
 120
 121 /**
 122  * Get a pipe_image_view object from an image unit.
 123  */
 124 void
 125 st_convert_image_from_unit(const struct st_context *st,
 126                            struct pipe_image_view *img,
 127                            GLuint imgUnit)
 128 {
 129    struct gl_image_unit *u = &st->ctx->ImageUnits[imgUnit];
 130
 131    if (!_mesa_is_image_unit_valid(st->ctx, u)) {
 132       memset(img, 0, sizeof(*img));
 133       return;
 134    }
 135
 136    st_convert_image(st, u, img);
 137 }
 138
 139 static void
 140 st_bind_images(struct st_context *st, struct gl_program *prog,
 141                enum pipe_shader_type shader_type)
 142 {
 143    unsigned i;
 144    struct pipe_image_view images[MAX_IMAGE_UNIFORMS];
 145    struct gl_program_constants *c;
 146
 147    if (!prog || !st->pipe->set_shader_images)
 148       return;
 149
 150    c = &st->ctx->Const.Program[prog->info.stage];
 151
 152    for (i = 0; i < prog->info.num_images; i++) {
 153       struct pipe_image_view *img = &images[i];
 154
 155       st_convert_image_from_unit(st, img, prog->sh.ImageUnits[i]);
 156    }
 157    cso_set_shader_images(st->cso_context, shader_type, 0,
 158                          prog->info.num_images, images);
 159    /* clear out any stale shader images */
 160    if (prog->info.num_images < c->MaxImageUniforms)
 161       cso_set_shader_images(
 162             st->cso_context, shader_type, prog->info.num_images,
 163             c->MaxImageUniforms - prog->info.num_images, NULL);
 164 }
 165
 166 void st_bind_vs_images(struct st_context *st)
 167 {
 168    struct gl_program *prog =
 169       st->ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX];
 170
 171    st_bind_images(st, prog, PIPE_SHADER_VERTEX);
 172 }
 173
 174 void st_bind_fs_images(struct st_context *st)
 175 {
 176    struct gl_program *prog =
 177       st->ctx->_Shader->CurrentProgram[MESA_SHADER_FRAGMENT];
 178
 179    st_bind_images(st, prog, PIPE_SHADER_FRAGMENT);
 180 }
 181
 182 void st_bind_gs_images(struct st_context *st)
 183 {
 184    struct gl_program *prog =
 185       st->ctx->_Shader->CurrentProgram[MESA_SHADER_GEOMETRY];
 186
 187    st_bind_images(st, prog, PIPE_SHADER_GEOMETRY);
 188 }
 189
 190 void st_bind_tcs_images(struct st_context *st)
 191 {
 192    struct gl_program *prog =
 193       st->ctx->_Shader->CurrentProgram[MESA_SHADER_TESS_CTRL];
 194
 195    st_bind_images(st, prog, PIPE_SHADER_TESS_CTRL);
 196 }
 197
 198 void st_bind_tes_images(struct st_context *st)
 199 {
 200    struct gl_program *prog =
 201       st->ctx->_Shader->CurrentProgram[MESA_SHADER_TESS_EVAL];
 202
 203    st_bind_images(st, prog, PIPE_SHADER_TESS_EVAL);
 204 }
 205
 206 void st_bind_cs_images(struct st_context *st)
 207 {
 208    struct gl_program *prog =
 209       st->ctx->_Shader->CurrentProgram[MESA_SHADER_COMPUTE];
 210
 211    st_bind_images(st, prog, PIPE_SHADER_COMPUTE);
 212 }