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    if (svga_have_gb_objects(svga)) {
  47       struct svga_winsys_screen *sws = svga_screen(svga->pipe.screen)->sws;
  48       enum pipe_error ret;
  49
  50       variant->gb_shader = sws->shader_create(sws, type,
  51                                               variant->tokens, codeLen);
  52       if (!variant->gb_shader)
  53          return PIPE_ERROR_OUT_OF_MEMORY;
  54
  55       ret = SVGA3D_BindGBShader(svga->swc, variant->gb_shader);
  56       if (ret != PIPE_OK) {
  57          sws->shader_destroy(sws, variant->gb_shader);
  58          variant->gb_shader = NULL;
  59       }
  60
  61       return ret;
  62    }
  63    else {
  64       enum pipe_error ret;
  65
  66       /* Allocate an integer ID for the shader */
  67       variant->id = util_bitmask_add(svga->shader_id_bm);
  68       if (variant->id == UTIL_BITMASK_INVALID_INDEX) {
  69          return PIPE_ERROR_OUT_OF_MEMORY;
  70       }
  71
  72       /* Issue SVGA3D device command to define the shader */
  73       ret = SVGA3D_DefineShader(svga->swc,
  74                                 variant->id,
  75                                 type,
  76                                 variant->tokens,
  77                                 codeLen);
  78       if (ret != PIPE_OK) {
  79          /* free the ID */
  80          assert(variant->id != UTIL_BITMASK_INVALID_INDEX);
  81          util_bitmask_clear(svga->shader_id_bm, variant->id);
  82          variant->id = UTIL_BITMASK_INVALID_INDEX;
  83          return ret;
  84       }
  85    }
  86
  87    return PIPE_OK;
  88 }
  89
  90
  91
  92 enum pipe_error
  93 svga_destroy_shader_variant(struct svga_context *svga,
  94                             SVGA3dShaderType type,
  95                             struct svga_shader_variant *variant)
  96 {
  97    enum pipe_error ret = PIPE_OK;
  98
  99    if (svga_have_gb_objects(svga)) {
 100       struct svga_winsys_screen *sws = svga_screen(svga->pipe.screen)->sws;
 101
 102       sws->shader_destroy(sws, variant->gb_shader);
 103       variant->gb_shader = NULL;
 104       goto end;
 105    }
 106
 107    /* first try */
 108    if (variant->id != UTIL_BITMASK_INVALID_INDEX) {
 109       ret = SVGA3D_DestroyShader(svga->swc, variant->id, type);
 110
 111       if (ret != PIPE_OK) {
 112          /* flush and try again */
 113          svga_context_flush(svga, NULL);
 114
 115          ret = SVGA3D_DestroyShader(svga->swc, variant->id, type);
 116          assert(ret == PIPE_OK);
 117       }
 118
 119       util_bitmask_clear(svga->shader_id_bm, variant->id);
 120    }
 121
 122 end:
 123    FREE((unsigned *)variant->tokens);
 124    FREE(variant);
 125
 126    return ret;
 127 }