src/mesa/main/glthread_shaderobj.c

   1 /*
   2  * Copyright © 2012 Intel Corporation
   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  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24 #include "glthread_marshal.h"
  25 #include "dispatch.h"
  26
  27 struct marshal_cmd_ShaderSource
  28 {
  29    struct marshal_cmd_base cmd_base;
  30    GLuint shader;
  31    GLsizei count;
  32    /* Followed by GLint length[count], then the contents of all strings,
  33     * concatenated.
  34     */
  35 };
  36
  37
  38 void
  39 _mesa_unmarshal_ShaderSource(struct gl_context *ctx,
  40                              const struct marshal_cmd_ShaderSource *cmd)
  41 {
  42    const GLint *cmd_length = (const GLint *) (cmd + 1);
  43    const GLchar *cmd_strings = (const GLchar *) (cmd_length + cmd->count);
  44    /* TODO: how to deal with malloc failure? */
  45    const GLchar * *string = malloc(cmd->count * sizeof(const GLchar *));
  46    int i;
  47
  48    for (i = 0; i < cmd->count; ++i) {
  49       string[i] = cmd_strings;
  50       cmd_strings += cmd_length[i];
  51    }
  52    CALL_ShaderSource(ctx->CurrentServerDispatch,
  53                      (cmd->shader, cmd->count, string, cmd_length));
  54    free((void *)string);
  55 }
  56
  57
  58 static size_t
  59 measure_ShaderSource_strings(GLsizei count, const GLchar * const *string,
  60                              const GLint *length_in, GLint *length_out)
  61 {
  62    int i;
  63    size_t total_string_length = 0;
  64
  65    for (i = 0; i < count; ++i) {
  66       if (length_in == NULL || length_in[i] < 0) {
  67          if (string[i])
  68             length_out[i] = strlen(string[i]);
  69       } else {
  70          length_out[i] = length_in[i];
  71       }
  72       total_string_length += length_out[i];
  73    }
  74    return total_string_length;
  75 }
  76
  77
  78 void GLAPIENTRY
  79 _mesa_marshal_ShaderSource(GLuint shader, GLsizei count,
  80                            const GLchar * const *string, const GLint *length)
  81 {
  82    /* TODO: how to report an error if count < 0? */
  83
  84    GET_CURRENT_CONTEXT(ctx);
  85    /* TODO: how to deal with malloc failure? */
  86    const size_t fixed_cmd_size = sizeof(struct marshal_cmd_ShaderSource);
  87    STATIC_ASSERT(sizeof(struct marshal_cmd_ShaderSource) % sizeof(GLint) == 0);
  88    size_t length_size = count * sizeof(GLint);
  89    GLint *length_tmp = malloc(length_size);
  90    size_t total_string_length =
  91       measure_ShaderSource_strings(count, string, length, length_tmp);
  92    size_t total_cmd_size = fixed_cmd_size + length_size + total_string_length;
  93
  94    if (total_cmd_size <= MARSHAL_MAX_CMD_SIZE && count > 0) {
  95       struct marshal_cmd_ShaderSource *cmd =
  96          _mesa_glthread_allocate_command(ctx, DISPATCH_CMD_ShaderSource,
  97                                          total_cmd_size);
  98       GLint *cmd_length = (GLint *) (cmd + 1);
  99       GLchar *cmd_strings = (GLchar *) (cmd_length + count);
 100       int i;
 101
 102       cmd->shader = shader;
 103       cmd->count = count;
 104       memcpy(cmd_length, length_tmp, length_size);
 105       for (i = 0; i < count; ++i) {
 106          memcpy(cmd_strings, string[i], cmd_length[i]);
 107          cmd_strings += cmd_length[i];
 108       }
 109    } else {
 110       _mesa_glthread_finish(ctx);
 111       CALL_ShaderSource(ctx->CurrentServerDispatch,
 112                         (shader, count, string, length_tmp));
 113    }
 114    free(length_tmp);
 115 }