drape/render_state.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184

#include "drape/render_state.hpp"
#include "drape/glfunctions.hpp"

#include "base/buffer_vector.hpp"

namespace dp
{
BlendingParams::BlendingParams()
  : m_blendFunction(gl_const::GLAddBlend)
  , m_blendSrcFactor(gl_const::GLSrcAlfa)
  , m_blendDstFactor(gl_const::GLOneMinusSrcAlfa)
{}

void BlendingParams::Apply() const
{
  GLFunctions::glBlendEquation(m_blendFunction);
  GLFunctions::glBlendFunc(m_blendSrcFactor, m_blendDstFactor);
}

Blending::Blending(bool isEnabled)
  : m_isEnabled(isEnabled)
{}

void Blending::Apply() const
{
  if (m_isEnabled)
    GLFunctions::glEnable(gl_const::GLBlending);
  else
    GLFunctions::glDisable(gl_const::GLBlending);
}

bool Blending::operator<(Blending const & other) const { return m_isEnabled < other.m_isEnabled; }

bool Blending::operator==(Blending const & other) const { return m_isEnabled == other.m_isEnabled; }

glConst RenderState::GetDepthFunction() const
{
  return m_depthFunction;
}

void RenderState::SetDepthFunction(glConst functionName)
{
  m_depthFunction = functionName;
}

bool RenderState::GetDepthTestEnabled() const
{
  return m_depthTestEnabled;
}

void RenderState::SetDepthTestEnabled(bool enabled)
{
  m_depthTestEnabled = enabled;
}

glConst RenderState::GetTextureFilter() const
{
  return m_textureFilter;
}

void RenderState::SetTextureFilter(glConst filter)
{
  m_textureFilter = filter;
}

bool RenderState::GetDrawAsLine() const
{
  return m_drawAsLine;
}

void RenderState::SetDrawAsLine(bool drawAsLine)
{
  m_drawAsLine = drawAsLine;
}

int RenderState::GetLineWidth() const
{
  return m_lineWidth;
}

void RenderState::SetLineWidth(int width)
{
  m_lineWidth = width;
}

bool RenderState::operator<(RenderState const & other) const
{
  if (!m_renderStateExtension->Equal(other.m_renderStateExtension))
    return m_renderStateExtension->Less(other.m_renderStateExtension);
  if (!(m_blending == other.m_blending))
    return m_blending < other.m_blending;
  if (m_gpuProgram != other.m_gpuProgram)
    return m_gpuProgram < other.m_gpuProgram;
  if (m_gpuProgram3d != other.m_gpuProgram3d)
    return m_gpuProgram3d < other.m_gpuProgram3d;
  if (m_depthFunction != other.m_depthFunction)
    return m_depthFunction < other.m_depthFunction;
  if (m_colorTexture != other.m_colorTexture)
    return m_colorTexture < other.m_colorTexture;
  if (m_maskTexture != other.m_maskTexture)
    return m_maskTexture < other.m_maskTexture;
  if (m_textureFilter != other.m_textureFilter)
    return m_textureFilter < other.m_textureFilter;
  if (m_drawAsLine != other.m_drawAsLine)
    return m_drawAsLine < other.m_drawAsLine;

  return m_lineWidth < other.m_lineWidth;
}

bool RenderState::operator==(RenderState const & other) const
{
  return m_renderStateExtension->Equal(other.m_renderStateExtension) &&
         m_gpuProgram == other.m_gpuProgram &&
         m_gpuProgram3d == other.m_gpuProgram3d &&
         m_blending == other.m_blending &&
         m_colorTexture == other.m_colorTexture &&
         m_maskTexture == other.m_maskTexture &&
         m_textureFilter == other.m_textureFilter &&
         m_depthFunction == other.m_depthFunction &&
         m_drawAsLine == other.m_drawAsLine &&
         m_lineWidth == other.m_lineWidth;
}

bool RenderState::operator!=(RenderState const & other) const
{
  return !operator==(other);
}

uint8_t TextureState::m_usedSlots = 0;

void TextureState::ApplyTextures(RenderState const & state, ref_ptr<GpuProgram> program)
{
  m_usedSlots = 0;

  ref_ptr<Texture> tex = state.GetColorTexture();
  int8_t colorTexLoc = -1;
  if (tex != nullptr && (colorTexLoc = program->GetUniformLocation("u_colorTex")) >= 0)
  {
    GLFunctions::glActiveTexture(gl_const::GLTexture0);
    tex->Bind();
    GLFunctions::glUniformValuei(colorTexLoc, 0);
    tex->SetFilter(state.GetTextureFilter());
    m_usedSlots++;
  }

  tex = state.GetMaskTexture();
  int8_t maskTexLoc = -1;
  if (tex != nullptr && (maskTexLoc = program->GetUniformLocation("u_maskTex")) >= 0)
  {
    GLFunctions::glActiveTexture(gl_const::GLTexture0 + 1);
    tex->Bind();
    GLFunctions::glUniformValuei(maskTexLoc, 1);
    tex->SetFilter(state.GetTextureFilter());
    m_usedSlots++;
  }
}

uint8_t TextureState::GetLastUsedSlots()
{
  return m_usedSlots;
}

void ApplyBlending(RenderState const & state)
{
  state.GetBlending().Apply();
}

void ApplyState(RenderState const & state, ref_ptr<GpuProgram> program)
{
  TextureState::ApplyTextures(state, program);
  ApplyBlending(state);
  if (state.GetDepthTestEnabled())
  {
    GLFunctions::glEnable(gl_const::GLDepthTest);
    GLFunctions::glDepthFunc(state.GetDepthFunction());
  }
  else
  {
    GLFunctions::glDisable(gl_const::GLDepthTest);
  }
  ASSERT_GREATER_OR_EQUAL(state.GetLineWidth(), 0, ());
  GLFunctions::glLineWidth(static_cast<uint32_t>(state.GetLineWidth()));
}
}  // namespace dp