1 | // |
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2 | // Lol Engine |
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3 | // |
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4 | // Copyright: (c) 2010-2011 Sam Hocevar <sam@hocevar.net> |
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5 | // This program is free software; you can redistribute it and/or |
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6 | // modify it under the terms of the Do What The Fuck You Want To |
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7 | // Public License, Version 2, as published by Sam Hocevar. See |
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8 | // http://sam.zoy.org/projects/COPYING.WTFPL for more details. |
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9 | // |
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10 | |
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11 | #if defined HAVE_CONFIG_H |
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12 | # include "config.h" |
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13 | #endif |
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14 | |
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15 | #include <cstdio> |
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16 | #include <cmath> |
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17 | |
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18 | #include "core.h" |
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19 | #include "lolgl.h" |
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20 | #include "loldebug.h" |
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21 | |
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22 | namespace lol |
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23 | { |
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24 | |
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25 | /* |
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26 | * DebugQuad implementation class |
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27 | */ |
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28 | |
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29 | class DebugQuadData |
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30 | { |
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31 | friend class DebugQuad; |
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32 | |
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33 | private: |
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34 | int initialised; |
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35 | float time; |
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36 | #if defined HAVE_GL_2X || defined HAVE_GLES_2X |
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37 | GLuint buflist[3]; |
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38 | Shader *shader; |
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39 | #elif defined HAVE_GL_1X || defined HAVE_GLES_1X |
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40 | GLuint buflist[3]; |
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41 | #endif |
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42 | GLuint texlist[1]; |
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43 | uint8_t image[1][32 * 32 * 4]; |
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44 | }; |
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45 | |
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46 | /* |
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47 | * Public DebugQuad class |
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48 | */ |
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49 | |
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50 | DebugQuad::DebugQuad() |
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51 | : data(new DebugQuadData()) |
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52 | { |
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53 | data->initialised = 0; |
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54 | data->time = 0.0f; |
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55 | } |
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56 | |
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57 | void DebugQuad::TickGame(float deltams) |
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58 | { |
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59 | Entity::TickGame(deltams); |
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60 | |
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61 | data->time += deltams; |
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62 | } |
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63 | |
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64 | void DebugQuad::TickDraw(float deltams) |
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65 | { |
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66 | Entity::TickDraw(deltams); |
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67 | |
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68 | if (IsDestroying()) |
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69 | { |
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70 | if (data->initialised) |
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71 | { |
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72 | #if defined HAVE_GL_2X || defined HAVE_GLES_2X |
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73 | glDeleteBuffers(3, data->buflist); |
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74 | Shader::Destroy(data->shader); |
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75 | #elif defined HAVE_GL_1X || defined HAVE_GLES_1X |
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76 | glDeleteBuffers(3, data->buflist); |
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77 | #endif |
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78 | glDeleteTextures(1, data->texlist); |
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79 | data->initialised = 0; |
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80 | } |
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81 | } |
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82 | else if (!data->initialised) |
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83 | { |
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84 | #if defined HAVE_GL_2X || defined HAVE_GLES_2X |
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85 | glGenBuffers(3, data->buflist); |
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86 | |
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87 | static char const *vertexshader = |
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88 | "#version 130\n" |
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89 | "in vec2 in_Position;\n" |
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90 | "in vec4 in_Color;\n" |
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91 | "in vec2 in_TexCoord;\n" |
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92 | "out vec4 pass_Color;\n" |
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93 | "void main()\n" |
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94 | "{\n" |
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95 | " gl_Position = vec4(in_Position, 0.0f, 1.0f);\n" |
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96 | " gl_TexCoord[0] = vec4(in_TexCoord, 0.0, 0.0);\n" |
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97 | " pass_Color = in_Color;\n" |
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98 | "}\n"; |
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99 | static char const *fragmentshader = |
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100 | "#version 130\n" |
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101 | "in vec4 pass_Color;\n" |
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102 | "uniform sampler2D in_Texture;\n" |
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103 | "void main()\n" |
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104 | "{\n" |
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105 | " vec4 col = pass_Color;\n" |
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106 | " vec4 tex = texture2D(in_Texture, vec2(gl_TexCoord[0]));\n" |
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107 | " gl_FragColor = col * tex;\n" |
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108 | "}\n"; |
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109 | data->shader = Shader::Create(vertexshader, fragmentshader); |
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110 | #elif defined HAVE_GL_1X || defined HAVE_GLES_1X |
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111 | glGenBuffers(3, data->buflist); |
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112 | #endif |
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113 | glGenTextures(1, data->texlist); |
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114 | |
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115 | glActiveTexture(GL_TEXTURE0); |
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116 | glBindTexture(GL_TEXTURE_2D, data->texlist[0]); |
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117 | for (int j = 0; j < 32; j++) |
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118 | for (int i = 0; i < 32; i++) |
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119 | { |
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120 | uint8_t wb = (((i / 2) ^ (j / 2)) & 1) * 0xff; |
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121 | data->image[0][(j * 32 + i) * 4 + 0] = wb; |
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122 | data->image[0][(j * 32 + i) * 4 + 1] = wb; |
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123 | data->image[0][(j * 32 + i) * 4 + 2] = wb; |
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124 | data->image[0][(j * 32 + i) * 4 + 3] = 255; |
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125 | } |
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126 | /* Use GL_RGBA instead of 4 for the internal format (Android) */ |
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127 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 32, 32, 0, |
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128 | GL_RGBA, GL_UNSIGNED_BYTE, data->image[0]); |
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129 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); |
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130 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); |
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131 | |
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132 | data->initialised = 1; |
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133 | } |
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134 | |
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135 | float const st = sinf(0.0005f * data->time); |
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136 | float const ct = cosf(0.0005f * data->time); |
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137 | |
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138 | GLfloat const verts[6][2] = |
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139 | { |
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140 | { -0.7f * (st + ct), 0.7f * (st - ct) }, |
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141 | { 0.7f * (st - ct), 0.7f * (st + ct) }, |
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142 | { -0.7f * (st - ct), -0.7f * (st + ct) }, |
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143 | |
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144 | { -0.7f * (st - ct), -0.7f * (st + ct) }, |
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145 | { 0.7f * (st - ct), 0.7f * (st + ct) }, |
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146 | { 0.7f * (st + ct), -0.7f * (st - ct) }, |
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147 | }; |
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148 | |
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149 | /* Using only 3 components breaks on Android for some reason. */ |
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150 | static GLfloat const cols[6][4] = |
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151 | { |
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152 | { 0.8f, 0.2f, 0.2f, 1.0f }, |
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153 | { 0.2f, 0.2f, 0.8f, 1.0f }, |
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154 | { 0.8f, 0.8f, 0.2f, 1.0f }, |
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155 | |
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156 | { 0.8f, 0.8f, 0.2f, 1.0f }, |
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157 | { 0.2f, 0.2f, 0.8f, 1.0f }, |
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158 | { 0.2f, 0.8f, 0.2f, 1.0f }, |
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159 | }; |
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160 | |
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161 | static GLfloat const tcs[6][2] = |
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162 | { |
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163 | { 0.0f, 1.0f }, { 1.0f, 1.0f }, { 0.0f, 0.0f }, |
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164 | { 0.0f, 0.0f }, { 1.0f, 1.0f }, { 1.0f, 0.0f }, |
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165 | }; |
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166 | |
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167 | #if defined HAVE_GL_2X || defined HAVE_GLES_2X |
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168 | data->shader->Bind(); |
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169 | GLuint attr_pos, attr_col, attr_tex; |
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170 | attr_pos = data->shader->GetAttribLocation("in_Position"); |
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171 | attr_col = data->shader->GetAttribLocation("in_Color"); |
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172 | attr_tex = data->shader->GetAttribLocation("in_TexCoord"); |
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173 | |
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174 | glEnableVertexAttribArray(attr_pos); |
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175 | glEnableVertexAttribArray(attr_col); |
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176 | glEnableVertexAttribArray(attr_tex); |
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177 | |
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178 | glBindBuffer(GL_ARRAY_BUFFER, data->buflist[0]); |
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179 | glBufferData(GL_ARRAY_BUFFER, 12 * sizeof(GLfloat), verts, GL_STATIC_DRAW); |
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180 | glVertexAttribPointer(attr_pos, 2, GL_FLOAT, GL_FALSE, 0, 0); |
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181 | |
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182 | glBindBuffer(GL_ARRAY_BUFFER, data->buflist[1]); |
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183 | glBufferData(GL_ARRAY_BUFFER, 24 * sizeof(GLfloat), cols, GL_STATIC_DRAW); |
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184 | glVertexAttribPointer(attr_col, 4, GL_FLOAT, GL_FALSE, 0, 0); |
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185 | |
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186 | glBindBuffer(GL_ARRAY_BUFFER, data->buflist[2]); |
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187 | glBufferData(GL_ARRAY_BUFFER, 12 * sizeof(GLfloat), tcs, GL_STATIC_DRAW); |
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188 | glVertexAttribPointer(attr_tex, 2, GL_FLOAT, GL_FALSE, 0, 0); |
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189 | |
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190 | glDrawArrays(GL_TRIANGLES, 0, 6); |
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191 | |
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192 | glDisableVertexAttribArray(attr_pos); |
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193 | glDisableVertexAttribArray(attr_col); |
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194 | glDisableVertexAttribArray(attr_tex); |
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195 | #elif defined HAVE_GL_1X || defined HAVE_GLES_1X |
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196 | /* Reset all model-view-projection matrices */ |
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197 | glMatrixMode(GL_PROJECTION); |
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198 | glPushMatrix(); |
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199 | glLoadIdentity(); |
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200 | glMatrixMode(GL_MODELVIEW); |
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201 | glPushMatrix(); |
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202 | glLoadIdentity(); |
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203 | |
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204 | /* Set up state machine */ |
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205 | glEnableClientState(GL_TEXTURE_COORD_ARRAY); |
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206 | glEnable(GL_TEXTURE_2D); |
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207 | glEnableClientState(GL_VERTEX_ARRAY); |
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208 | glEnableClientState(GL_COLOR_ARRAY); |
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209 | |
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210 | glActiveTexture(GL_TEXTURE0); |
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211 | glBindTexture(GL_TEXTURE_2D, data->texlist[0]); |
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212 | |
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213 | /* Bind vertex, color and texture coordinate buffers */ |
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214 | #if defined HAVE_GL_1X |
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215 | glBindBuffer(GL_ARRAY_BUFFER, data->buflist[0]); |
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216 | glBufferData(GL_ARRAY_BUFFER, 12 * sizeof(GLfloat), verts, GL_STATIC_DRAW); |
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217 | glVertexPointer(2, GL_FLOAT, 0, NULL); |
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218 | |
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219 | glBindBuffer(GL_ARRAY_BUFFER, data->buflist[1]); |
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220 | glBufferData(GL_ARRAY_BUFFER, 24 * sizeof(GLfloat), cols, GL_STATIC_DRAW); |
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221 | glColorPointer(4, GL_FLOAT, 0, NULL); |
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222 | |
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223 | glBindBuffer(GL_ARRAY_BUFFER, data->buflist[2]); |
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224 | glBufferData(GL_ARRAY_BUFFER, 12 * sizeof(GLfloat), tcs, GL_STATIC_DRAW); |
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225 | glTexCoordPointer(2, GL_FLOAT, 0, NULL); |
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226 | #else |
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227 | glVertexPointer(2, GL_FLOAT, 0, verts); |
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228 | glColorPointer(4, GL_FLOAT, 0, cols); |
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229 | glTexCoordPointer(2, GL_FLOAT, 0, tcs); |
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230 | #endif |
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231 | |
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232 | /* Draw arrays */ |
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233 | glDrawArrays(GL_TRIANGLES, 0, 6); |
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234 | |
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235 | /* Disable state machine features */ |
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236 | glDisableClientState(GL_VERTEX_ARRAY); |
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237 | glDisableClientState(GL_COLOR_ARRAY); |
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238 | glDisableClientState(GL_TEXTURE_COORD_ARRAY); |
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239 | |
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240 | /* Restore matrices */ |
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241 | glMatrixMode(GL_PROJECTION); |
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242 | glPopMatrix(); |
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243 | glMatrixMode(GL_MODELVIEW); |
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244 | glPopMatrix(); |
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245 | #endif |
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246 | } |
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247 | |
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248 | DebugQuad::~DebugQuad() |
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249 | { |
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250 | delete data; |
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251 | } |
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252 | |
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253 | } /* namespace lol */ |
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254 | |
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