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annotate nuklear_ui/nuklear_sdl_gles2.h @ 1658:fa9ae059e4d3

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Added support for GLES in addition to desktop GL
author Mike Pavone <pavone@retrodev.com>
date Sun, 30 Dec 2018 21:10:44 -0800
parents b581663c42ec
children 56a1171e29b9
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1 /*
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2 * Nuklear - 1.40.8 - public domain
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3 * no warrenty implied; use at your own risk.
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4 * authored from 2015-2017 by Micha Mettke
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5 * emscripten from 2016 by Chris Willcocks
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6 * OpenGL ES 2.0 from 2017 by Dmitry Hrabrov a.k.a. DeXPeriX
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7 */
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8 /*
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9 * ==============================================================
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10 *
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11 * API
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12 *
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13 * ===============================================================
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14 */
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15 #ifndef NK_SDL_GLES2_H_
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16 #define NK_SDL_GLES2_H_
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17
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18 #include <SDL.h>
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19 #ifndef DISABLE_OPENGL
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20 #ifdef USE_GLES
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21 #include <SDL_opengles2.h>
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22 #else
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23 #include <GL/glew.h>
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24 #endif
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25 #endif
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26
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27
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28 NK_API struct nk_context* nk_sdl_init(SDL_Window *win);
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29 NK_API void nk_sdl_font_stash_begin(struct nk_font_atlas **atlas);
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30 NK_API void nk_sdl_font_stash_end(void);
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31 NK_API int nk_sdl_handle_event(SDL_Event *evt);
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32 NK_API void nk_sdl_render(enum nk_anti_aliasing , int max_vertex_buffer, int max_element_buffer);
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33 NK_API void nk_sdl_shutdown(void);
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34 NK_API void nk_sdl_device_destroy(void);
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35 NK_API void nk_sdl_device_create(void);
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36
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37 #endif
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38
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39 /*
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40 * ==============================================================
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41 *
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42 * IMPLEMENTATION
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43 *
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44 * ===============================================================
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45 */
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46 #ifdef NK_SDL_GLES2_IMPLEMENTATION
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47
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48 #include <string.h>
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49
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50 struct nk_sdl_device {
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51 struct nk_buffer cmds;
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52 struct nk_draw_null_texture null;
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53 GLuint vbo, ebo;
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54 GLuint prog;
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55 GLuint vert_shdr;
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56 GLuint frag_shdr;
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57 GLint attrib_pos;
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58 GLint attrib_uv;
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59 GLint attrib_col;
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60 GLint uniform_tex;
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61 GLint uniform_proj;
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62 GLuint font_tex;
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63 GLsizei vs;
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64 size_t vp, vt, vc;
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65 };
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66
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67 struct nk_sdl_vertex {
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68 GLfloat position[2];
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69 GLfloat uv[2];
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70 nk_byte col[4];
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71 };
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72
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73 static struct nk_sdl {
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74 SDL_Window *win;
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75 struct nk_sdl_device ogl;
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76 struct nk_context ctx;
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77 struct nk_font_atlas atlas;
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78 } sdl;
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79
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80 #ifdef USE_GLES
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81 #define NK_SHADER_VERSION "#version 100\n"
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82 #define DECLARE_PRECISION "precision mediump float;\n"
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83 #else
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84 #define NK_SHADER_VERSION "#version 110\n"
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85 #define DECLARE_PRECISION
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86 #endif
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87
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88
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89 NK_API void
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90 nk_sdl_device_create(void)
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91 {
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92 GLint status;
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93 static const GLchar *vertex_shader =
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94 NK_SHADER_VERSION
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95 "uniform mat4 ProjMtx;\n"
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96 "attribute vec2 Position;\n"
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97 "attribute vec2 TexCoord;\n"
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98 "attribute vec4 Color;\n"
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99 "varying vec2 Frag_UV;\n"
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100 "varying vec4 Frag_Color;\n"
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101 "void main() {\n"
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102 " Frag_UV = TexCoord;\n"
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103 " Frag_Color = Color;\n"
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104 " gl_Position = ProjMtx * vec4(Position.xy, 0, 1);\n"
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105 "}\n";
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106 static const GLchar *fragment_shader =
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107 NK_SHADER_VERSION
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108 DECLARE_PRECISION
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109 "uniform sampler2D Texture;\n"
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110 "varying vec2 Frag_UV;\n"
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111 "varying vec4 Frag_Color;\n"
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112 "void main(){\n"
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113 " gl_FragColor = Frag_Color * texture2D(Texture, Frag_UV);\n"
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114 "}\n";
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115
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116 struct nk_sdl_device *dev = &sdl.ogl;
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117
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118 nk_buffer_init_default(&dev->cmds);
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119 dev->prog = glCreateProgram();
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120 dev->vert_shdr = glCreateShader(GL_VERTEX_SHADER);
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121 dev->frag_shdr = glCreateShader(GL_FRAGMENT_SHADER);
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122 glShaderSource(dev->vert_shdr, 1, &vertex_shader, 0);
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123 glShaderSource(dev->frag_shdr, 1, &fragment_shader, 0);
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124 glCompileShader(dev->vert_shdr);
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125 glCompileShader(dev->frag_shdr);
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126 glGetShaderiv(dev->vert_shdr, GL_COMPILE_STATUS, &status);
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127 assert(status == GL_TRUE);
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128 glGetShaderiv(dev->frag_shdr, GL_COMPILE_STATUS, &status);
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129 assert(status == GL_TRUE);
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130 glAttachShader(dev->prog, dev->vert_shdr);
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131 glAttachShader(dev->prog, dev->frag_shdr);
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132 glLinkProgram(dev->prog);
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133 glGetProgramiv(dev->prog, GL_LINK_STATUS, &status);
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134 assert(status == GL_TRUE);
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135
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136
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137 dev->uniform_tex = glGetUniformLocation(dev->prog, "Texture");
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138 dev->uniform_proj = glGetUniformLocation(dev->prog, "ProjMtx");
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139 dev->attrib_pos = glGetAttribLocation(dev->prog, "Position");
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140 dev->attrib_uv = glGetAttribLocation(dev->prog, "TexCoord");
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diff changeset
141 dev->attrib_col = glGetAttribLocation(dev->prog, "Color");
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diff changeset
142 {
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diff changeset
143 dev->vs = sizeof(struct nk_sdl_vertex);
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diff changeset
144 dev->vp = offsetof(struct nk_sdl_vertex, position);
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145 dev->vt = offsetof(struct nk_sdl_vertex, uv);
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diff changeset
146 dev->vc = offsetof(struct nk_sdl_vertex, col);
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diff changeset
147
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diff changeset
148 /* Allocate buffers */
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diff changeset
149 glGenBuffers(1, &dev->vbo);
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diff changeset
150 glGenBuffers(1, &dev->ebo);
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diff changeset
151 }
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diff changeset
152 glBindTexture(GL_TEXTURE_2D, 0);
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diff changeset
153 glBindBuffer(GL_ARRAY_BUFFER, 0);
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diff changeset
154 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
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diff changeset
155 }
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156
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157 NK_INTERN void
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158 nk_sdl_device_upload_atlas(const void *image, int width, int height)
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159 {
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160 struct nk_sdl_device *dev = &sdl.ogl;
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161 glGenTextures(1, &dev->font_tex);
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162 glBindTexture(GL_TEXTURE_2D, dev->font_tex);
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163 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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164 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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165 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0,
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166 GL_RGBA, GL_UNSIGNED_BYTE, image);
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167 }
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168
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169 NK_API void
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170 nk_sdl_device_destroy(void)
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171 {
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172 struct nk_sdl_device *dev = &sdl.ogl;
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173 glDetachShader(dev->prog, dev->vert_shdr);
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diff changeset
174 glDetachShader(dev->prog, dev->frag_shdr);
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diff changeset
175 glDeleteShader(dev->vert_shdr);
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diff changeset
176 glDeleteShader(dev->frag_shdr);
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177 glDeleteProgram(dev->prog);
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178 glDeleteTextures(1, &dev->font_tex);
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diff changeset
179 glDeleteBuffers(1, &dev->vbo);
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diff changeset
180 glDeleteBuffers(1, &dev->ebo);
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diff changeset
181 nk_buffer_free(&dev->cmds);
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diff changeset
182 }
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183
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184 NK_API void
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diff changeset
185 nk_sdl_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_buffer)
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186 {
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187 struct nk_sdl_device *dev = &sdl.ogl;
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188 int width, height;
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189 int display_width, display_height;
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190 struct nk_vec2 scale;
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191 GLfloat ortho[4][4] = {
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192 {2.0f, 0.0f, 0.0f, 0.0f},
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193 {0.0f,-2.0f, 0.0f, 0.0f},
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194 {0.0f, 0.0f,-1.0f, 0.0f},
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195 {-1.0f,1.0f, 0.0f, 1.0f},
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196 };
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diff changeset
197 SDL_GetWindowSize(sdl.win, &width, &height);
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198 SDL_GL_GetDrawableSize(sdl.win, &display_width, &display_height);
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199 ortho[0][0] /= (GLfloat)width;
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200 ortho[1][1] /= (GLfloat)height;
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diff changeset
201
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diff changeset
202 scale.x = (float)display_width/(float)width;
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diff changeset
203 scale.y = (float)display_height/(float)height;
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diff changeset
204
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diff changeset
205 /* setup global state */
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diff changeset
206 glViewport(0,0,display_width,display_height);
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diff changeset
207 glEnable(GL_BLEND);
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208 glBlendEquation(GL_FUNC_ADD);
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diff changeset
209 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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210 glDisable(GL_CULL_FACE);
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diff changeset
211 glDisable(GL_DEPTH_TEST);
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diff changeset
212 glEnable(GL_SCISSOR_TEST);
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diff changeset
213 glActiveTexture(GL_TEXTURE0);
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diff changeset
214
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diff changeset
215 /* setup program */
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diff changeset
216 glUseProgram(dev->prog);
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diff changeset
217 glUniform1i(dev->uniform_tex, 0);
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diff changeset
218 glUniformMatrix4fv(dev->uniform_proj, 1, GL_FALSE, &ortho[0][0]);
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diff changeset
219 {
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diff changeset
220 /* convert from command queue into draw list and draw to screen */
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diff changeset
221 const struct nk_draw_command *cmd;
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diff changeset
222 void *vertices, *elements;
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diff changeset
223 const nk_draw_index *offset = NULL;
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diff changeset
224
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diff changeset
225 /* Bind buffers */
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diff changeset
226 glBindBuffer(GL_ARRAY_BUFFER, dev->vbo);
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diff changeset
227 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, dev->ebo);
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diff changeset
228
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diff changeset
229 {
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diff changeset
230 /* buffer setup */
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diff changeset
231 glEnableVertexAttribArray((GLuint)dev->attrib_pos);
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diff changeset
232 glEnableVertexAttribArray((GLuint)dev->attrib_uv);
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diff changeset
233 glEnableVertexAttribArray((GLuint)dev->attrib_col);
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diff changeset
234
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diff changeset
235 glVertexAttribPointer((GLuint)dev->attrib_pos, 2, GL_FLOAT, GL_FALSE, dev->vs, (void*)dev->vp);
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diff changeset
236 glVertexAttribPointer((GLuint)dev->attrib_uv, 2, GL_FLOAT, GL_FALSE, dev->vs, (void*)dev->vt);
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diff changeset
237 glVertexAttribPointer((GLuint)dev->attrib_col, 4, GL_UNSIGNED_BYTE, GL_TRUE, dev->vs, (void*)dev->vc);
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diff changeset
238 }
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diff changeset
239
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diff changeset
240 glBufferData(GL_ARRAY_BUFFER, max_vertex_buffer, NULL, GL_STREAM_DRAW);
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diff changeset
241 glBufferData(GL_ELEMENT_ARRAY_BUFFER, max_element_buffer, NULL, GL_STREAM_DRAW);
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diff changeset
242
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diff changeset
243 /* load vertices/elements directly into vertex/element buffer */
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diff changeset
244 vertices = malloc((size_t)max_vertex_buffer);
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diff changeset
245 elements = malloc((size_t)max_element_buffer);
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diff changeset
246 {
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diff changeset
247 /* fill convert configuration */
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diff changeset
248 struct nk_convert_config config;
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diff changeset
249 static const struct nk_draw_vertex_layout_element vertex_layout[] = {
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diff changeset
250 {NK_VERTEX_POSITION, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sdl_vertex, position)},
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diff changeset
251 {NK_VERTEX_TEXCOORD, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sdl_vertex, uv)},
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252 {NK_VERTEX_COLOR, NK_FORMAT_R8G8B8A8, NK_OFFSETOF(struct nk_sdl_vertex, col)},
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253 {NK_VERTEX_LAYOUT_END}
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diff changeset
254 };
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diff changeset
255 NK_MEMSET(&config, 0, sizeof(config));
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diff changeset
256 config.vertex_layout = vertex_layout;
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diff changeset
257 config.vertex_size = sizeof(struct nk_sdl_vertex);
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diff changeset
258 config.vertex_alignment = NK_ALIGNOF(struct nk_sdl_vertex);
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diff changeset
259 config.null = dev->null;
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diff changeset
260 config.circle_segment_count = 22;
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diff changeset
261 config.curve_segment_count = 22;
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diff changeset
262 config.arc_segment_count = 22;
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diff changeset
263 config.global_alpha = 1.0f;
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diff changeset
264 config.shape_AA = AA;
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diff changeset
265 config.line_AA = AA;
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diff changeset
266
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diff changeset
267 /* setup buffers to load vertices and elements */
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diff changeset
268 {struct nk_buffer vbuf, ebuf;
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diff changeset
269 nk_buffer_init_fixed(&vbuf, vertices, (nk_size)max_vertex_buffer);
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diff changeset
270 nk_buffer_init_fixed(&ebuf, elements, (nk_size)max_element_buffer);
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diff changeset
271 nk_convert(&sdl.ctx, &dev->cmds, &vbuf, &ebuf, &config);}
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diff changeset
272 }
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diff changeset
273 glBufferSubData(GL_ARRAY_BUFFER, 0, (size_t)max_vertex_buffer, vertices);
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parents:
diff changeset
274 glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, (size_t)max_element_buffer, elements);
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parents:
diff changeset
275 free(vertices);
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parents:
diff changeset
276 free(elements);
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parents:
diff changeset
277
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parents:
diff changeset
278 /* iterate over and execute each draw command */
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parents:
diff changeset
279 nk_draw_foreach(cmd, &sdl.ctx, &dev->cmds) {
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parents:
diff changeset
280 if (!cmd->elem_count) continue;
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parents:
diff changeset
281 glBindTexture(GL_TEXTURE_2D, (GLuint)cmd->texture.id);
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parents:
diff changeset
282 glScissor((GLint)(cmd->clip_rect.x * scale.x),
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
283 (GLint)((height - (GLint)(cmd->clip_rect.y + cmd->clip_rect.h)) * scale.y),
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
284 (GLint)(cmd->clip_rect.w * scale.x),
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
285 (GLint)(cmd->clip_rect.h * scale.y));
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
286 glDrawElements(GL_TRIANGLES, (GLsizei)cmd->elem_count, GL_UNSIGNED_SHORT, offset);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
287 offset += cmd->elem_count;
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
288 }
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
289 nk_clear(&sdl.ctx);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
290 }
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parents:
diff changeset
291
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
292 glUseProgram(0);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
293 glBindBuffer(GL_ARRAY_BUFFER, 0);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
294 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
295
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
296 glDisable(GL_BLEND);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
297 glDisable(GL_SCISSOR_TEST);
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parents:
diff changeset
298 }
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parents:
diff changeset
299
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diff changeset
300 static void
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parents:
diff changeset
301 nk_sdl_clipbard_paste(nk_handle usr, struct nk_text_edit *edit)
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parents:
diff changeset
302 {
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
303 const char *text = SDL_GetClipboardText();
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
304 if (text) nk_textedit_paste(edit, text, nk_strlen(text));
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
305 (void)usr;
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parents:
diff changeset
306 }
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parents:
diff changeset
307
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
308 static void
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
309 nk_sdl_clipbard_copy(nk_handle usr, const char *text, int len)
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
310 {
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
311 char *str = 0;
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
312 (void)usr;
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
313 if (!len) return;
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
314 str = (char*)malloc((size_t)len+1);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
315 if (!str) return;
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
316 memcpy(str, text, (size_t)len);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
317 str[len] = '\0';
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
318 SDL_SetClipboardText(str);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
319 free(str);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
320 }
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
321
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
322 NK_API struct nk_context*
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
323 nk_sdl_init(SDL_Window *win)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
324 {
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
325 sdl.win = win;
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
326 nk_init_default(&sdl.ctx, 0);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
327 sdl.ctx.clip.copy = nk_sdl_clipbard_copy;
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
328 sdl.ctx.clip.paste = nk_sdl_clipbard_paste;
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
329 sdl.ctx.clip.userdata = nk_handle_ptr(0);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
330 nk_sdl_device_create();
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
331 return &sdl.ctx;
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
332 }
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
333
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
334 NK_API void
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
335 nk_sdl_font_stash_begin(struct nk_font_atlas **atlas)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
336 {
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
337 nk_font_atlas_init_default(&sdl.atlas);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
338 nk_font_atlas_begin(&sdl.atlas);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
339 *atlas = &sdl.atlas;
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parents:
diff changeset
340 }
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parents:
diff changeset
341
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
342 NK_API void
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
343 nk_sdl_font_stash_end(void)
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
344 {
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
345 const void *image; int w, h;
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
346 image = nk_font_atlas_bake(&sdl.atlas, &w, &h, NK_FONT_ATLAS_RGBA32);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
347 nk_sdl_device_upload_atlas(image, w, h);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
348 nk_font_atlas_end(&sdl.atlas, nk_handle_id((int)sdl.ogl.font_tex), &sdl.ogl.null);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
349 if (sdl.atlas.default_font)
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
350 nk_style_set_font(&sdl.ctx, &sdl.atlas.default_font->handle);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
351
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
352 }
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
353
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
354 NK_API int
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
355 nk_sdl_handle_event(SDL_Event *evt)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
356 {
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
357 struct nk_context *ctx = &sdl.ctx;
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
358 if (evt->type == SDL_KEYUP || evt->type == SDL_KEYDOWN) {
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
359 /* key events */
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
360 int down = evt->type == SDL_KEYDOWN;
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
361 const Uint8* state = SDL_GetKeyboardState(0);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
362 SDL_Keycode sym = evt->key.keysym.sym;
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
363 if (sym == SDLK_RSHIFT || sym == SDLK_LSHIFT)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
364 nk_input_key(ctx, NK_KEY_SHIFT, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
365 else if (sym == SDLK_DELETE)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
366 nk_input_key(ctx, NK_KEY_DEL, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
367 else if (sym == SDLK_RETURN)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
368 nk_input_key(ctx, NK_KEY_ENTER, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
369 else if (sym == SDLK_TAB)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
370 nk_input_key(ctx, NK_KEY_TAB, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
371 else if (sym == SDLK_BACKSPACE)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
372 nk_input_key(ctx, NK_KEY_BACKSPACE, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
373 else if (sym == SDLK_HOME) {
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
374 nk_input_key(ctx, NK_KEY_TEXT_START, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
375 nk_input_key(ctx, NK_KEY_SCROLL_START, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
376 } else if (sym == SDLK_END) {
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
377 nk_input_key(ctx, NK_KEY_TEXT_END, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
378 nk_input_key(ctx, NK_KEY_SCROLL_END, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
379 } else if (sym == SDLK_PAGEDOWN) {
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
380 nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
381 } else if (sym == SDLK_PAGEUP) {
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
382 nk_input_key(ctx, NK_KEY_SCROLL_UP, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
383 } else if (sym == SDLK_z)
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
384 nk_input_key(ctx, NK_KEY_TEXT_UNDO, down && state[SDL_SCANCODE_LCTRL]);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
385 else if (sym == SDLK_r)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
386 nk_input_key(ctx, NK_KEY_TEXT_REDO, down && state[SDL_SCANCODE_LCTRL]);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
387 else if (sym == SDLK_c)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
388 nk_input_key(ctx, NK_KEY_COPY, down && state[SDL_SCANCODE_LCTRL]);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
389 else if (sym == SDLK_v)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
390 nk_input_key(ctx, NK_KEY_PASTE, down && state[SDL_SCANCODE_LCTRL]);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
391 else if (sym == SDLK_x)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
392 nk_input_key(ctx, NK_KEY_CUT, down && state[SDL_SCANCODE_LCTRL]);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
393 else if (sym == SDLK_b)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
394 nk_input_key(ctx, NK_KEY_TEXT_LINE_START, down && state[SDL_SCANCODE_LCTRL]);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
395 else if (sym == SDLK_e)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
396 nk_input_key(ctx, NK_KEY_TEXT_LINE_END, down && state[SDL_SCANCODE_LCTRL]);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
397 else if (sym == SDLK_UP)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
398 nk_input_key(ctx, NK_KEY_UP, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
399 else if (sym == SDLK_DOWN)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
400 nk_input_key(ctx, NK_KEY_DOWN, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
401 else if (sym == SDLK_LEFT) {
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
402 if (state[SDL_SCANCODE_LCTRL])
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
403 nk_input_key(ctx, NK_KEY_TEXT_WORD_LEFT, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
404 else nk_input_key(ctx, NK_KEY_LEFT, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
405 } else if (sym == SDLK_RIGHT) {
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
406 if (state[SDL_SCANCODE_LCTRL])
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
407 nk_input_key(ctx, NK_KEY_TEXT_WORD_RIGHT, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
408 else nk_input_key(ctx, NK_KEY_RIGHT, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
409 } else return 0;
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410 return 1;
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411 } else if (evt->type == SDL_MOUSEBUTTONDOWN || evt->type == SDL_MOUSEBUTTONUP) {
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412 /* mouse button */
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413 int down = evt->type == SDL_MOUSEBUTTONDOWN;
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414 const int x = evt->button.x, y = evt->button.y;
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415 if (evt->button.button == SDL_BUTTON_LEFT) {
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416 if (evt->button.clicks > 1)
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417 nk_input_button(ctx, NK_BUTTON_DOUBLE, x, y, down);
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418 nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
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419 } else if (evt->button.button == SDL_BUTTON_MIDDLE)
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420 nk_input_button(ctx, NK_BUTTON_MIDDLE, x, y, down);
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421 else if (evt->button.button == SDL_BUTTON_RIGHT)
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422 nk_input_button(ctx, NK_BUTTON_RIGHT, x, y, down);
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423 return 1;
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424 } else if (evt->type == SDL_MOUSEMOTION) {
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425 /* mouse motion */
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426 if (ctx->input.mouse.grabbed) {
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427 int x = (int)ctx->input.mouse.prev.x, y = (int)ctx->input.mouse.prev.y;
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428 nk_input_motion(ctx, x + evt->motion.xrel, y + evt->motion.yrel);
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429 } else nk_input_motion(ctx, evt->motion.x, evt->motion.y);
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430 return 1;
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431 } else if (evt->type == SDL_TEXTINPUT) {
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432 /* text input */
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433 nk_glyph glyph;
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434 memcpy(glyph, evt->text.text, NK_UTF_SIZE);
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435 nk_input_glyph(ctx, glyph);
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436 return 1;
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437 } else if (evt->type == SDL_MOUSEWHEEL) {
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438 /* mouse wheel */
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439 nk_input_scroll(ctx,nk_vec2((float)evt->wheel.x,(float)evt->wheel.y));
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440 return 1;
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441 }
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442 return 0;
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443 }
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444
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445 NK_API
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446 void nk_sdl_shutdown(void)
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447 {
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448 nk_font_atlas_clear(&sdl.atlas);
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449 nk_free(&sdl.ctx);
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450 nk_sdl_device_destroy();
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451 memset(&sdl, 0, sizeof(sdl));
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452 }
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453
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454 #endif