src/glsl/standalone_scaffolding.cpp

   1 /*
   2  * Copyright © 2011 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
  21  * DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 /* This file declares stripped-down versions of functions that
  25  * normally exist outside of the glsl folder, so that they can be used
  26  * when running the GLSL compiler standalone (for unit testing or
  27  * compiling builtins).
  28  */
  29
  30 #include "standalone_scaffolding.h"
  31
  32 #include <assert.h>
  33 #include <string.h>
  34 #include "ralloc.h"
  35
  36 void
  37 _mesa_reference_shader(struct gl_context *ctx, struct gl_shader **ptr,
  38                        struct gl_shader *sh)
  39 {
  40    (void) ctx;
  41    *ptr = sh;
  42 }
  43
  44 struct gl_shader *
  45 _mesa_new_shader(struct gl_context *ctx, GLuint name, GLenum type)
  46 {
  47    struct gl_shader *shader;
  48
  49    (void) ctx;
  50
  51    assert(type == GL_FRAGMENT_SHADER || type == GL_VERTEX_SHADER);
  52    shader = rzalloc(NULL, struct gl_shader);
  53    if (shader) {
  54       shader->Type = type;
  55       shader->Name = name;
  56       shader->RefCount = 1;
  57    }
  58    return shader;
  59 }
  60
  61 void initialize_context_to_defaults(struct gl_context *ctx, gl_api api)
  62 {
  63    memset(ctx, 0, sizeof(*ctx));
  64
  65    ctx->API = api;
  66
  67    ctx->Extensions.dummy_false = false;
  68    ctx->Extensions.dummy_true = true;
  69    ctx->Extensions.ARB_ES2_compatibility = true;
  70    ctx->Extensions.ARB_draw_instanced = true;
  71    ctx->Extensions.ARB_fragment_coord_conventions = true;
  72    ctx->Extensions.EXT_texture_array = true;
  73    ctx->Extensions.NV_texture_rectangle = true;
  74    ctx->Extensions.EXT_texture3D = true;
  75    ctx->Extensions.OES_EGL_image_external = true;
  76
  77    ctx->Const.GLSLVersion = 120;
  78
  79    /* 1.20 minimums. */
  80    ctx->Const.MaxLights = 8;
  81    ctx->Const.MaxClipPlanes = 6;
  82    ctx->Const.MaxTextureUnits = 2;
  83    ctx->Const.MaxTextureCoordUnits = 2;
  84    ctx->Const.VertexProgram.MaxAttribs = 16;
  85
  86    ctx->Const.VertexProgram.MaxUniformComponents = 512;
  87    ctx->Const.MaxVarying = 8; /* == gl_MaxVaryingFloats / 4 */
  88    ctx->Const.MaxVertexTextureImageUnits = 0;
  89    ctx->Const.MaxCombinedTextureImageUnits = 2;
  90    ctx->Const.MaxTextureImageUnits = 2;
  91    ctx->Const.FragmentProgram.MaxUniformComponents = 64;
  92
  93    ctx->Const.MaxDrawBuffers = 1;
  94 }