git.cworth.org Git - vogl/blob - src/voglcommon/vogl_current_vertex_attrib_state.cpp

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  25
  26 // File: vogl_current_vertex_attrib_state.cpp
  27 #include "vogl_current_vertex_attrib_state.h"
  28 #include "vogl_context_info.h"
  29
  30 vogl_current_vertex_attrib_state::vogl_current_vertex_attrib_state()
  31     : m_valid(false)
  32 {
  33 }
  34
  35 vogl_current_vertex_attrib_state::~vogl_current_vertex_attrib_state()
  36 {
  37 }
  38
  39 bool vogl_current_vertex_attrib_state::snapshot(const vogl_context_info &context_info)
  40 {
  41     clear();
  42
  43     VOGL_CHECK_GL_ERROR;
  44
  45     m_current_vertex_attribs.resize(context_info.get_max_vertex_attribs());
  46
  47     if (context_info.get_max_vertex_attribs())
  48     {
  49         m_current_vertex_attribs[0].set(0, 0, 0, 1);
  50
  51         for (uint i = 1; i < context_info.get_max_vertex_attribs(); i++)
  52         {
  53             GL_ENTRYPOINT(glGetVertexAttribdv)(i, GL_CURRENT_VERTEX_ATTRIB, m_current_vertex_attribs[i].get_ptr());
  54
  55             VOGL_CHECK_GL_ERROR;
  56         }
  57     }
  58
  59     m_valid = true;
  60
  61     return true;
  62 }
  63
  64 bool vogl_current_vertex_attrib_state::restore(const vogl_context_info &context_info) const
  65 {
  66     if (!m_valid)
  67         return false;
  68
  69     VOGL_CHECK_GL_ERROR;
  70
  71     if (m_current_vertex_attribs.size() > context_info.get_max_vertex_attribs())
  72     {
  73         vogl_error_printf("%s: Unable to restore all current vertex attribs, object has %u attribs, context only supports %u attribs\n", VOGL_METHOD_NAME, m_current_vertex_attribs.size(), context_info.get_max_vertex_attribs());
  74     }
  75
  76     uint max_vertex_attribs_to_restore = math::minimum<uint>(m_current_vertex_attribs.size(), context_info.get_max_vertex_attribs());
  77
  78     for (uint i = 1; i < max_vertex_attribs_to_restore; i++)
  79     {
  80         GL_ENTRYPOINT(glVertexAttrib4dv)(i, m_current_vertex_attribs[i].get_ptr());
  81
  82         VOGL_CHECK_GL_ERROR;
  83     }
  84
  85     return true;
  86 }
  87
  88 void vogl_current_vertex_attrib_state::clear()
  89 {
  90     m_current_vertex_attribs.clear();
  91     m_valid = false;
  92 }
  93
  94 bool vogl_current_vertex_attrib_state::serialize(json_node &node, vogl_blob_manager &blob_manager) const
  95 {
  96     VOGL_NOTE_UNUSED(blob_manager);
  97
  98     if (!m_valid)
  99         return false;
 100
 101     node.init_array();
 102     for (uint i = 0; i < m_current_vertex_attribs.size(); i++)
 103     {
 104         json_node &vec_node = node.add_array();
 105         for (uint j = 0; j < 4; j++)
 106             vec_node.add_value(m_current_vertex_attribs[i][j]);
 107     }
 108
 109     return true;
 110 }
 111
 112 bool vogl_current_vertex_attrib_state::deserialize(const json_node &node, const vogl_blob_manager &blob_manager)
 113 {
 114     VOGL_NOTE_UNUSED(blob_manager);
 115
 116     clear();
 117
 118     if (!node.are_all_children_arrays())
 119         return false;
 120
 121     m_current_vertex_attribs.resize(node.size());
 122     for (uint i = 0; i < node.size(); i++)
 123     {
 124         const json_node &vec_node = *node.get_child(i);
 125         if (vec_node.size() != 4)
 126         {
 127             clear();
 128             return false;
 129         }
 130
 131         // TODO: We could have roundtrip errors here.
 132         m_current_vertex_attribs[i].set(vec_node[0U].as_double(), vec_node[1U].as_double(), vec_node[2U].as_double(), vec_node[3U].as_double());
 133     }
 134
 135     m_valid = true;
 136
 137     return true;
 138 }