src/gallium/drivers/svga/svga_shader.c

   1 /**********************************************************
   2  * Copyright 2008-2012 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "util/u_bitmask.h"
  27 #include "util/u_memory.h"
  28 #include "svga_context.h"
  29 #include "svga_cmd.h"
  30 #include "svga_shader.h"
  31
  32
  33
  34 /**
  35  * Issue the SVGA3D commands to define a new shader.
  36  * \param result  contains the shader tokens, etc.  The result->id field will
  37  *                be set here.
  38  */
  39 enum pipe_error
  40 svga_define_shader(struct svga_context *svga,
  41                    SVGA3dShaderType type,
  42                    struct svga_shader_variant *variant)
  43 {
  44    unsigned codeLen = variant->nr_tokens * sizeof(variant->tokens[0]);
  45
  46    {
  47       enum pipe_error ret;
  48
  49       /* Allocate an integer ID for the shader */
  50       variant->id = util_bitmask_add(svga->shader_id_bm);
  51       if (variant->id == UTIL_BITMASK_INVALID_INDEX) {
  52          return PIPE_ERROR_OUT_OF_MEMORY;
  53       }
  54
  55       /* Issue SVGA3D device command to define the shader */
  56       ret = SVGA3D_DefineShader(svga->swc,
  57                                 variant->id,
  58                                 type,
  59                                 variant->tokens,
  60                                 codeLen);
  61       if (ret != PIPE_OK) {
  62          /* free the ID */
  63          assert(variant->id != UTIL_BITMASK_INVALID_INDEX);
  64          util_bitmask_clear(svga->shader_id_bm, variant->id);
  65          variant->id = UTIL_BITMASK_INVALID_INDEX;
  66          return ret;
  67       }
  68    }
  69
  70    return PIPE_OK;
  71 }
  72
  73
  74
  75 enum pipe_error
  76 svga_destroy_shader_variant(struct svga_context *svga,
  77                             SVGA3dShaderType type,
  78                             struct svga_shader_variant *variant)
  79 {
  80    enum pipe_error ret = PIPE_OK;
  81
  82    /* first try */
  83    if (variant->id != UTIL_BITMASK_INVALID_INDEX) {
  84       ret = SVGA3D_DestroyShader(svga->swc, variant->id, type);
  85
  86       if (ret != PIPE_OK) {
  87          /* flush and try again */
  88          svga_context_flush(svga, NULL);
  89
  90          ret = SVGA3D_DestroyShader(svga->swc, variant->id, type);
  91          assert(ret == PIPE_OK);
  92       }
  93
  94       util_bitmask_clear(svga->shader_id_bm, variant->id);
  95    }
  96
  97    FREE((unsigned *)variant->tokens);
  98    FREE(variant);
  99
 100    return ret;
 101 }