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annotate nuklear_ui/nuklear_sdl_gles2.h @ 2011:579fe3f6fe76

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Improved texture atlas size estimation in Nuklear
author Mike Pavone <pavone@retrodev.com>
date Sun, 01 Nov 2020 12:35:08 -0800
parents e07fc3d473b2
children 0757da8ee702
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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 #ifndef DISABLE_OPENGL
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51 struct nk_sdl_device {
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52 struct nk_buffer cmds;
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53 struct nk_draw_null_texture null;
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54 GLuint vbo, ebo;
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55 GLuint prog;
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56 GLuint vert_shdr;
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57 GLuint frag_shdr;
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58 GLint attrib_pos;
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59 GLint attrib_uv;
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60 GLint attrib_col;
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61 GLint uniform_tex;
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62 GLint uniform_proj;
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63 GLuint font_tex;
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64 GLsizei vs;
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65 size_t vp, vt, vc;
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66 };
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67
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68 struct nk_sdl_vertex {
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69 GLfloat position[2];
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70 GLfloat uv[2];
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71 nk_byte col[4];
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72 };
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73 #endif
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75 static struct nk_sdl {
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76 SDL_Window *win;
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77 #ifndef DISABLE_OPENGL
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78 struct nk_sdl_device ogl;
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79 #endif
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80 struct nk_context ctx;
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81 struct nk_font_atlas atlas;
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82 } sdl;
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83
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84 #ifdef USE_GLES
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85 #define NK_SHADER_VERSION "#version 100\n"
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86 #define DECLARE_PRECISION "precision mediump float;\n"
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87 #else
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88 #define NK_SHADER_VERSION "#version 110\n"
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89 #define DECLARE_PRECISION
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90 #endif
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91
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92 #ifndef DISABLE_OPENGL
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93 NK_API void
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94 nk_sdl_device_create(void)
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95 {
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96 GLint status;
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97 static const GLchar *vertex_shader =
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98 NK_SHADER_VERSION
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99 "uniform mat4 ProjMtx;\n"
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100 "attribute vec2 Position;\n"
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101 "attribute vec2 TexCoord;\n"
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102 "attribute vec4 Color;\n"
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103 "varying vec2 Frag_UV;\n"
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104 "varying vec4 Frag_Color;\n"
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105 "void main() {\n"
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106 " Frag_UV = TexCoord;\n"
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107 " Frag_Color = Color;\n"
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108 " gl_Position = ProjMtx * vec4(Position.xy, 0, 1);\n"
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109 "}\n";
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110 static const GLchar *fragment_shader =
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111 NK_SHADER_VERSION
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112 DECLARE_PRECISION
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113 "uniform sampler2D Texture;\n"
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114 "varying vec2 Frag_UV;\n"
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115 "varying vec4 Frag_Color;\n"
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116 "void main(){\n"
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117 " gl_FragColor = Frag_Color * texture2D(Texture, Frag_UV);\n"
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118 "}\n";
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119
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120 struct nk_sdl_device *dev = &sdl.ogl;
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121
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122 nk_buffer_init_default(&dev->cmds);
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123 dev->prog = glCreateProgram();
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124 dev->vert_shdr = glCreateShader(GL_VERTEX_SHADER);
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125 dev->frag_shdr = glCreateShader(GL_FRAGMENT_SHADER);
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126 glShaderSource(dev->vert_shdr, 1, &vertex_shader, 0);
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127 glShaderSource(dev->frag_shdr, 1, &fragment_shader, 0);
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128 glCompileShader(dev->vert_shdr);
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129 glCompileShader(dev->frag_shdr);
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130 glGetShaderiv(dev->vert_shdr, GL_COMPILE_STATUS, &status);
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131 assert(status == GL_TRUE);
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132 glGetShaderiv(dev->frag_shdr, GL_COMPILE_STATUS, &status);
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133 assert(status == GL_TRUE);
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134 glAttachShader(dev->prog, dev->vert_shdr);
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135 glAttachShader(dev->prog, dev->frag_shdr);
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136 glLinkProgram(dev->prog);
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137 glGetProgramiv(dev->prog, GL_LINK_STATUS, &status);
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138 assert(status == GL_TRUE);
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139
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parents:
diff changeset
140
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diff changeset
141 dev->uniform_tex = glGetUniformLocation(dev->prog, "Texture");
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142 dev->uniform_proj = glGetUniformLocation(dev->prog, "ProjMtx");
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143 dev->attrib_pos = glGetAttribLocation(dev->prog, "Position");
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diff changeset
144 dev->attrib_uv = glGetAttribLocation(dev->prog, "TexCoord");
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diff changeset
145 dev->attrib_col = glGetAttribLocation(dev->prog, "Color");
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diff changeset
146 {
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diff changeset
147 dev->vs = sizeof(struct nk_sdl_vertex);
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diff changeset
148 dev->vp = offsetof(struct nk_sdl_vertex, position);
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diff changeset
149 dev->vt = offsetof(struct nk_sdl_vertex, uv);
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diff changeset
150 dev->vc = offsetof(struct nk_sdl_vertex, col);
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151
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diff changeset
152 /* Allocate buffers */
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diff changeset
153 glGenBuffers(1, &dev->vbo);
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diff changeset
154 glGenBuffers(1, &dev->ebo);
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diff changeset
155 }
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diff changeset
156 glBindTexture(GL_TEXTURE_2D, 0);
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diff changeset
157 glBindBuffer(GL_ARRAY_BUFFER, 0);
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diff changeset
158 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
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diff changeset
159 }
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diff changeset
160
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161 NK_INTERN void
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162 nk_sdl_device_upload_atlas(const void *image, int width, int height)
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163 {
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164 struct nk_sdl_device *dev = &sdl.ogl;
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165 glGenTextures(1, &dev->font_tex);
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166 glBindTexture(GL_TEXTURE_2D, dev->font_tex);
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diff changeset
167 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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168 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
2011
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169 printf("Creating texture atlas texture with size %dx%d\n", width, height);
1474
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170 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0,
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171 GL_RGBA, GL_UNSIGNED_BYTE, image);
2011
579fe3f6fe76 Improved texture atlas size estimation in Nuklear
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diff changeset
172 GLenum err = glGetError();
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diff changeset
173 if (err != GL_NO_ERROR) {
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diff changeset
174 printf("glTexImage2D failed with error %d\n", err);
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parents: 1862
diff changeset
175 }
1474
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176 }
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diff changeset
177
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178 NK_API void
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179 nk_sdl_device_destroy(void)
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diff changeset
180 {
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diff changeset
181 struct nk_sdl_device *dev = &sdl.ogl;
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diff changeset
182 glDetachShader(dev->prog, dev->vert_shdr);
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diff changeset
183 glDetachShader(dev->prog, dev->frag_shdr);
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diff changeset
184 glDeleteShader(dev->vert_shdr);
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diff changeset
185 glDeleteShader(dev->frag_shdr);
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diff changeset
186 glDeleteProgram(dev->prog);
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diff changeset
187 glDeleteTextures(1, &dev->font_tex);
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diff changeset
188 glDeleteBuffers(1, &dev->vbo);
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diff changeset
189 glDeleteBuffers(1, &dev->ebo);
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diff changeset
190 nk_buffer_free(&dev->cmds);
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diff changeset
191 }
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diff changeset
192
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diff changeset
193 NK_API void
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diff changeset
194 nk_sdl_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_buffer)
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195 {
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diff changeset
196 struct nk_sdl_device *dev = &sdl.ogl;
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diff changeset
197 int width, height;
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diff changeset
198 int display_width, display_height;
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diff changeset
199 struct nk_vec2 scale;
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diff changeset
200 GLfloat ortho[4][4] = {
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diff changeset
201 {2.0f, 0.0f, 0.0f, 0.0f},
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diff changeset
202 {0.0f,-2.0f, 0.0f, 0.0f},
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diff changeset
203 {0.0f, 0.0f,-1.0f, 0.0f},
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diff changeset
204 {-1.0f,1.0f, 0.0f, 1.0f},
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diff changeset
205 };
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diff changeset
206 SDL_GetWindowSize(sdl.win, &width, &height);
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diff changeset
207 SDL_GL_GetDrawableSize(sdl.win, &display_width, &display_height);
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diff changeset
208 ortho[0][0] /= (GLfloat)width;
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diff changeset
209 ortho[1][1] /= (GLfloat)height;
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diff changeset
210
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diff changeset
211 scale.x = (float)display_width/(float)width;
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diff changeset
212 scale.y = (float)display_height/(float)height;
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diff changeset
213
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diff changeset
214 /* setup global state */
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diff changeset
215 glViewport(0,0,display_width,display_height);
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diff changeset
216 glEnable(GL_BLEND);
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diff changeset
217 glBlendEquation(GL_FUNC_ADD);
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diff changeset
218 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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diff changeset
219 glDisable(GL_CULL_FACE);
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diff changeset
220 glDisable(GL_DEPTH_TEST);
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diff changeset
221 glEnable(GL_SCISSOR_TEST);
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diff changeset
222 glActiveTexture(GL_TEXTURE0);
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diff changeset
223
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diff changeset
224 /* setup program */
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diff changeset
225 glUseProgram(dev->prog);
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diff changeset
226 glUniform1i(dev->uniform_tex, 0);
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diff changeset
227 glUniformMatrix4fv(dev->uniform_proj, 1, GL_FALSE, &ortho[0][0]);
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diff changeset
228 {
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diff changeset
229 /* convert from command queue into draw list and draw to screen */
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diff changeset
230 const struct nk_draw_command *cmd;
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diff changeset
231 void *vertices, *elements;
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diff changeset
232 const nk_draw_index *offset = NULL;
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diff changeset
233
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parents:
diff changeset
234 /* Bind buffers */
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diff changeset
235 glBindBuffer(GL_ARRAY_BUFFER, dev->vbo);
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diff changeset
236 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, dev->ebo);
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diff changeset
237
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
238 {
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parents:
diff changeset
239 /* buffer setup */
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parents:
diff changeset
240 glEnableVertexAttribArray((GLuint)dev->attrib_pos);
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diff changeset
241 glEnableVertexAttribArray((GLuint)dev->attrib_uv);
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diff changeset
242 glEnableVertexAttribArray((GLuint)dev->attrib_col);
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diff changeset
243
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diff changeset
244 glVertexAttribPointer((GLuint)dev->attrib_pos, 2, GL_FLOAT, GL_FALSE, dev->vs, (void*)dev->vp);
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diff changeset
245 glVertexAttribPointer((GLuint)dev->attrib_uv, 2, GL_FLOAT, GL_FALSE, dev->vs, (void*)dev->vt);
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diff changeset
246 glVertexAttribPointer((GLuint)dev->attrib_col, 4, GL_UNSIGNED_BYTE, GL_TRUE, dev->vs, (void*)dev->vc);
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diff changeset
247 }
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diff changeset
248
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diff changeset
249 glBufferData(GL_ARRAY_BUFFER, max_vertex_buffer, NULL, GL_STREAM_DRAW);
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diff changeset
250 glBufferData(GL_ELEMENT_ARRAY_BUFFER, max_element_buffer, NULL, GL_STREAM_DRAW);
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diff changeset
251
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parents:
diff changeset
252 /* load vertices/elements directly into vertex/element buffer */
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diff changeset
253 vertices = malloc((size_t)max_vertex_buffer);
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diff changeset
254 elements = malloc((size_t)max_element_buffer);
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parents:
diff changeset
255 {
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parents:
diff changeset
256 /* fill convert configuration */
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diff changeset
257 struct nk_convert_config config;
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diff changeset
258 static const struct nk_draw_vertex_layout_element vertex_layout[] = {
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diff changeset
259 {NK_VERTEX_POSITION, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sdl_vertex, position)},
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diff changeset
260 {NK_VERTEX_TEXCOORD, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sdl_vertex, uv)},
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diff changeset
261 {NK_VERTEX_COLOR, NK_FORMAT_R8G8B8A8, NK_OFFSETOF(struct nk_sdl_vertex, col)},
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diff changeset
262 {NK_VERTEX_LAYOUT_END}
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diff changeset
263 };
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diff changeset
264 NK_MEMSET(&config, 0, sizeof(config));
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diff changeset
265 config.vertex_layout = vertex_layout;
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diff changeset
266 config.vertex_size = sizeof(struct nk_sdl_vertex);
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diff changeset
267 config.vertex_alignment = NK_ALIGNOF(struct nk_sdl_vertex);
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diff changeset
268 config.null = dev->null;
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diff changeset
269 config.circle_segment_count = 22;
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diff changeset
270 config.curve_segment_count = 22;
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diff changeset
271 config.arc_segment_count = 22;
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diff changeset
272 config.global_alpha = 1.0f;
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diff changeset
273 config.shape_AA = AA;
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274 config.line_AA = AA;
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275
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276 /* setup buffers to load vertices and elements */
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277 {struct nk_buffer vbuf, ebuf;
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278 nk_buffer_init_fixed(&vbuf, vertices, (nk_size)max_vertex_buffer);
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279 nk_buffer_init_fixed(&ebuf, elements, (nk_size)max_element_buffer);
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280 nk_convert(&sdl.ctx, &dev->cmds, &vbuf, &ebuf, &config);}
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281 }
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diff changeset
282 glBufferSubData(GL_ARRAY_BUFFER, 0, (size_t)max_vertex_buffer, vertices);
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diff changeset
283 glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, (size_t)max_element_buffer, elements);
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diff changeset
284 free(vertices);
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diff changeset
285 free(elements);
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286
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287 /* iterate over and execute each draw command */
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288 nk_draw_foreach(cmd, &sdl.ctx, &dev->cmds) {
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289 if (!cmd->elem_count) continue;
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290 glBindTexture(GL_TEXTURE_2D, (GLuint)cmd->texture.id);
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291 glScissor((GLint)(cmd->clip_rect.x * scale.x),
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292 (GLint)((height - (GLint)(cmd->clip_rect.y + cmd->clip_rect.h)) * scale.y),
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293 (GLint)(cmd->clip_rect.w * scale.x),
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diff changeset
294 (GLint)(cmd->clip_rect.h * scale.y));
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295 glDrawElements(GL_TRIANGLES, (GLsizei)cmd->elem_count, GL_UNSIGNED_SHORT, offset);
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296 offset += cmd->elem_count;
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297 }
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298 nk_clear(&sdl.ctx);
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299 }
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300
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301 glUseProgram(0);
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302 glBindBuffer(GL_ARRAY_BUFFER, 0);
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303 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
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304
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305 glDisable(GL_BLEND);
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306 glDisable(GL_SCISSOR_TEST);
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307 }
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308 #endif
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309
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310 static void
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311 nk_sdl_clipbard_paste(nk_handle usr, struct nk_text_edit *edit)
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312 {
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313 const char *text = SDL_GetClipboardText();
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314 if (text) nk_textedit_paste(edit, text, nk_strlen(text));
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315 (void)usr;
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316 }
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317
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318 static void
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319 nk_sdl_clipbard_copy(nk_handle usr, const char *text, int len)
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320 {
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321 char *str = 0;
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322 (void)usr;
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323 if (!len) return;
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324 str = (char*)malloc((size_t)len+1);
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325 if (!str) return;
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326 memcpy(str, text, (size_t)len);
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327 str[len] = '\0';
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328 SDL_SetClipboardText(str);
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329 free(str);
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330 }
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331
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diff changeset
332 NK_API struct nk_context*
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diff changeset
333 nk_sdl_init(SDL_Window *win)
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diff changeset
334 {
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335 sdl.win = win;
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336 nk_init_default(&sdl.ctx, 0);
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337 sdl.ctx.clip.copy = nk_sdl_clipbard_copy;
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338 sdl.ctx.clip.paste = nk_sdl_clipbard_paste;
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339 sdl.ctx.clip.userdata = nk_handle_ptr(0);
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340 return &sdl.ctx;
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341 }
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342
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diff changeset
343 #ifndef DISABLE_OPENGL
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344 NK_API void
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345 nk_sdl_font_stash_begin(struct nk_font_atlas **atlas)
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346 {
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347 nk_font_atlas_init_default(&sdl.atlas);
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348 nk_font_atlas_begin(&sdl.atlas);
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349 *atlas = &sdl.atlas;
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350 }
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351
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diff changeset
352 NK_API void
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353 nk_sdl_font_stash_end(void)
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diff changeset
354 {
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diff changeset
355 const void *image; int w, h;
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diff changeset
356 image = nk_font_atlas_bake(&sdl.atlas, &w, &h, NK_FONT_ATLAS_RGBA32);
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357 nk_sdl_device_upload_atlas(image, w, h);
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diff changeset
358 nk_font_atlas_end(&sdl.atlas, nk_handle_id((int)sdl.ogl.font_tex), &sdl.ogl.null);
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diff changeset
359 if (sdl.atlas.default_font)
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diff changeset
360 nk_style_set_font(&sdl.ctx, &sdl.atlas.default_font->handle);
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diff changeset
361
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diff changeset
362 }
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diff changeset
363 #endif
1474
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diff changeset
364
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diff changeset
365 NK_API int
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diff changeset
366 nk_sdl_handle_event(SDL_Event *evt)
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diff changeset
367 {
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diff changeset
368 struct nk_context *ctx = &sdl.ctx;
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diff changeset
369 if (evt->type == SDL_KEYUP || evt->type == SDL_KEYDOWN) {
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diff changeset
370 /* key events */
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diff changeset
371 int down = evt->type == SDL_KEYDOWN;
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diff changeset
372 const Uint8* state = SDL_GetKeyboardState(0);
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diff changeset
373 SDL_Keycode sym = evt->key.keysym.sym;
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diff changeset
374 if (sym == SDLK_RSHIFT || sym == SDLK_LSHIFT)
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diff changeset
375 nk_input_key(ctx, NK_KEY_SHIFT, down);
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diff changeset
376 else if (sym == SDLK_DELETE)
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diff changeset
377 nk_input_key(ctx, NK_KEY_DEL, down);
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diff changeset
378 else if (sym == SDLK_RETURN)
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diff changeset
379 nk_input_key(ctx, NK_KEY_ENTER, down);
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diff changeset
380 else if (sym == SDLK_TAB)
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diff changeset
381 nk_input_key(ctx, NK_KEY_TAB, down);
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diff changeset
382 else if (sym == SDLK_BACKSPACE)
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diff changeset
383 nk_input_key(ctx, NK_KEY_BACKSPACE, down);
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diff changeset
384 else if (sym == SDLK_HOME) {
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diff changeset
385 nk_input_key(ctx, NK_KEY_TEXT_START, down);
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diff changeset
386 nk_input_key(ctx, NK_KEY_SCROLL_START, down);
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diff changeset
387 } else if (sym == SDLK_END) {
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diff changeset
388 nk_input_key(ctx, NK_KEY_TEXT_END, down);
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diff changeset
389 nk_input_key(ctx, NK_KEY_SCROLL_END, down);
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diff changeset
390 } else if (sym == SDLK_PAGEDOWN) {
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diff changeset
391 nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
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diff changeset
392 } else if (sym == SDLK_PAGEUP) {
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diff changeset
393 nk_input_key(ctx, NK_KEY_SCROLL_UP, down);
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diff changeset
394 } else if (sym == SDLK_z)
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diff changeset
395 nk_input_key(ctx, NK_KEY_TEXT_UNDO, down && state[SDL_SCANCODE_LCTRL]);
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diff changeset
396 else if (sym == SDLK_r)
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diff changeset
397 nk_input_key(ctx, NK_KEY_TEXT_REDO, down && state[SDL_SCANCODE_LCTRL]);
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diff changeset
398 else if (sym == SDLK_c)
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diff changeset
399 nk_input_key(ctx, NK_KEY_COPY, down && state[SDL_SCANCODE_LCTRL]);
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diff changeset
400 else if (sym == SDLK_v)
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diff changeset
401 nk_input_key(ctx, NK_KEY_PASTE, down && state[SDL_SCANCODE_LCTRL]);
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parents:
diff changeset
402 else if (sym == SDLK_x)
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diff changeset
403 nk_input_key(ctx, NK_KEY_CUT, down && state[SDL_SCANCODE_LCTRL]);
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parents:
diff changeset
404 else if (sym == SDLK_b)
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diff changeset
405 nk_input_key(ctx, NK_KEY_TEXT_LINE_START, down && state[SDL_SCANCODE_LCTRL]);
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parents:
diff changeset
406 else if (sym == SDLK_e)
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diff changeset
407 nk_input_key(ctx, NK_KEY_TEXT_LINE_END, down && state[SDL_SCANCODE_LCTRL]);
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parents:
diff changeset
408 else if (sym == SDLK_UP)
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Michael Pavone <pavone@retrodev.com>
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diff changeset
409 nk_input_key(ctx, NK_KEY_UP, down);
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410 else if (sym == SDLK_DOWN)
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411 nk_input_key(ctx, NK_KEY_DOWN, down);
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412 else if (sym == SDLK_LEFT) {
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diff changeset
413 if (state[SDL_SCANCODE_LCTRL])
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diff changeset
414 nk_input_key(ctx, NK_KEY_TEXT_WORD_LEFT, down);
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415 else nk_input_key(ctx, NK_KEY_LEFT, down);
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416 } else if (sym == SDLK_RIGHT) {
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diff changeset
417 if (state[SDL_SCANCODE_LCTRL])
c5c022c7aa54 Initial work on Nuklear-based UI
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diff changeset
418 nk_input_key(ctx, NK_KEY_TEXT_WORD_RIGHT, down);
c5c022c7aa54 Initial work on Nuklear-based UI
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419 else nk_input_key(ctx, NK_KEY_RIGHT, down);
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420 } else return 0;
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421 return 1;
1862
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422 } else if (evt->type == SDL_CONTROLLERBUTTONDOWN || evt->type == SDL_CONTROLLERBUTTONUP) {
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parents: 1825
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423 int down = evt->type == SDL_CONTROLLERBUTTONDOWN;
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parents: 1825
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424 if (evt->cbutton.button == SDL_CONTROLLER_BUTTON_DPAD_UP) {
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diff changeset
425 nk_input_key(ctx, NK_KEY_UP, down);
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426 } else if (evt->cbutton.button == SDL_CONTROLLER_BUTTON_DPAD_DOWN) {
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diff changeset
427 nk_input_key(ctx, NK_KEY_DOWN, down);
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428 } else if (evt->cbutton.button == SDL_CONTROLLER_BUTTON_A || evt->cbutton.button == SDL_CONTROLLER_BUTTON_START) {
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429 nk_input_key(ctx, NK_KEY_ENTER, down);
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diff changeset
430 }
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431 } else if (evt->type == SDL_CONTROLLERAXISMOTION) {
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parents: 1825
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432 if (evt->caxis.axis == SDL_CONTROLLER_AXIS_LEFTY || evt->caxis.axis == SDL_CONTROLLER_AXIS_RIGHTY) {
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433 int down = abs(evt->caxis.value) > 2000;
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diff changeset
434 if (evt->caxis.value >= 0) {
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diff changeset
435 if (ctx->input.keyboard.keys[NK_KEY_UP].down) {
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parents: 1825
diff changeset
436 nk_input_key(ctx, NK_KEY_UP, 0);
e07fc3d473b2 Basic UI navigation with controller
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diff changeset
437 }
e07fc3d473b2 Basic UI navigation with controller
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diff changeset
438 nk_input_key(ctx, NK_KEY_DOWN, down);
e07fc3d473b2 Basic UI navigation with controller
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diff changeset
439 } else {
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parents: 1825
diff changeset
440 if (ctx->input.keyboard.keys[NK_KEY_DOWN].down) {
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diff changeset
441 nk_input_key(ctx, NK_KEY_DOWN, 0);
e07fc3d473b2 Basic UI navigation with controller
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parents: 1825
diff changeset
442 }
e07fc3d473b2 Basic UI navigation with controller
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diff changeset
443 nk_input_key(ctx, NK_KEY_UP, down);
e07fc3d473b2 Basic UI navigation with controller
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parents: 1825
diff changeset
444 }
e07fc3d473b2 Basic UI navigation with controller
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diff changeset
445 }
1474
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diff changeset
446 } else if (evt->type == SDL_MOUSEBUTTONDOWN || evt->type == SDL_MOUSEBUTTONUP) {
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
447 /* mouse button */
c5c022c7aa54 Initial work on Nuklear-based UI
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diff changeset
448 int down = evt->type == SDL_MOUSEBUTTONDOWN;
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
449 const int x = evt->button.x, y = evt->button.y;
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
450 if (evt->button.button == SDL_BUTTON_LEFT) {
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
451 if (evt->button.clicks > 1)
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
452 nk_input_button(ctx, NK_BUTTON_DOUBLE, x, y, down);
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
453 nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
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parents:
diff changeset
454 } else if (evt->button.button == SDL_BUTTON_MIDDLE)
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parents:
diff changeset
455 nk_input_button(ctx, NK_BUTTON_MIDDLE, x, y, down);
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
456 else if (evt->button.button == SDL_BUTTON_RIGHT)
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
457 nk_input_button(ctx, NK_BUTTON_RIGHT, x, y, down);
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
458 return 1;
c5c022c7aa54 Initial work on Nuklear-based UI
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diff changeset
459 } else if (evt->type == SDL_MOUSEMOTION) {
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
460 /* mouse motion */
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
461 if (ctx->input.mouse.grabbed) {
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
462 int x = (int)ctx->input.mouse.prev.x, y = (int)ctx->input.mouse.prev.y;
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
463 nk_input_motion(ctx, x + evt->motion.xrel, y + evt->motion.yrel);
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
464 } else nk_input_motion(ctx, evt->motion.x, evt->motion.y);
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
465 return 1;
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
466 } else if (evt->type == SDL_TEXTINPUT) {
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
467 /* text input */
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
468 nk_glyph glyph;
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
469 memcpy(glyph, evt->text.text, NK_UTF_SIZE);
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
470 nk_input_glyph(ctx, glyph);
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
471 return 1;
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
472 } else if (evt->type == SDL_MOUSEWHEEL) {
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
473 /* mouse wheel */
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
474 nk_input_scroll(ctx,nk_vec2((float)evt->wheel.x,(float)evt->wheel.y));
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
475 return 1;
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
476 }
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
477 return 0;
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
478 }
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
479
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
480 NK_API
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
481 void nk_sdl_shutdown(void)
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
482 {
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
483 nk_font_atlas_clear(&sdl.atlas);
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
484 nk_free(&sdl.ctx);
1825
56a1171e29b9 Allow Nuklear UI to be used when OpenGL is disabled
Michael Pavone <pavone@retrodev.com>
parents: 1658
diff changeset
485 #ifndef DISABLE_OPENGL
1474
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
486 nk_sdl_device_destroy();
1825
56a1171e29b9 Allow Nuklear UI to be used when OpenGL is disabled
Michael Pavone <pavone@retrodev.com>
parents: 1658
diff changeset
487 #endif
1474
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
488 memset(&sdl, 0, sizeof(sdl));
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
489 }
c5c022c7aa54 Initial work on Nuklear-based UI
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parents:
diff changeset
490
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
491 #endif