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annotate nuklear_ui/nuklear_sdl_gles2.h @ 1600:7f39c40b4b25

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WIP UI for creating an SDL2 mapping for controllers that don't have one
author Michael Pavone <pavone@retrodev.com>
date Mon, 30 Jul 2018 09:38:01 -0700
parents b581663c42ec
children fa9ae059e4d3
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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 #include <GL/glew.h>
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21 #endif
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22
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23
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24 NK_API struct nk_context* nk_sdl_init(SDL_Window *win);
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25 NK_API void nk_sdl_font_stash_begin(struct nk_font_atlas **atlas);
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26 NK_API void nk_sdl_font_stash_end(void);
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27 NK_API int nk_sdl_handle_event(SDL_Event *evt);
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28 NK_API void nk_sdl_render(enum nk_anti_aliasing , int max_vertex_buffer, int max_element_buffer);
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29 NK_API void nk_sdl_shutdown(void);
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30 NK_API void nk_sdl_device_destroy(void);
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31 NK_API void nk_sdl_device_create(void);
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32
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33 #endif
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34
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35 /*
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36 * ==============================================================
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37 *
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38 * IMPLEMENTATION
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39 *
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40 * ===============================================================
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41 */
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42 #ifdef NK_SDL_GLES2_IMPLEMENTATION
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43
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44 #include <string.h>
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45
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46 struct nk_sdl_device {
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47 struct nk_buffer cmds;
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48 struct nk_draw_null_texture null;
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49 GLuint vbo, ebo;
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50 GLuint prog;
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51 GLuint vert_shdr;
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52 GLuint frag_shdr;
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53 GLint attrib_pos;
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54 GLint attrib_uv;
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55 GLint attrib_col;
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56 GLint uniform_tex;
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57 GLint uniform_proj;
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58 GLuint font_tex;
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59 GLsizei vs;
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60 size_t vp, vt, vc;
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61 };
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62
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63 struct nk_sdl_vertex {
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64 GLfloat position[2];
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65 GLfloat uv[2];
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66 nk_byte col[4];
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67 };
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68
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69 static struct nk_sdl {
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70 SDL_Window *win;
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71 struct nk_sdl_device ogl;
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72 struct nk_context ctx;
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73 struct nk_font_atlas atlas;
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74 } sdl;
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75
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76 #ifdef USE_GLES
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77 #define NK_SHADER_VERSION "#version 100\n"
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78 #define DECLARE_PRECISION "precision mediump float;\n"
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79 #else
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80 #define NK_SHADER_VERSION "#version 110\n"
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81 #define DECLARE_PRECISION
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82 #endif
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83
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84
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85 NK_API void
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86 nk_sdl_device_create(void)
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87 {
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88 GLint status;
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89 static const GLchar *vertex_shader =
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90 NK_SHADER_VERSION
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91 "uniform mat4 ProjMtx;\n"
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92 "attribute vec2 Position;\n"
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93 "attribute vec2 TexCoord;\n"
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94 "attribute vec4 Color;\n"
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95 "varying vec2 Frag_UV;\n"
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96 "varying vec4 Frag_Color;\n"
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97 "void main() {\n"
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98 " Frag_UV = TexCoord;\n"
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99 " Frag_Color = Color;\n"
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100 " gl_Position = ProjMtx * vec4(Position.xy, 0, 1);\n"
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101 "}\n";
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102 static const GLchar *fragment_shader =
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103 NK_SHADER_VERSION
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104 DECLARE_PRECISION
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105 "uniform sampler2D Texture;\n"
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106 "varying vec2 Frag_UV;\n"
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107 "varying vec4 Frag_Color;\n"
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108 "void main(){\n"
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109 " gl_FragColor = Frag_Color * texture2D(Texture, Frag_UV);\n"
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110 "}\n";
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111
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112 struct nk_sdl_device *dev = &sdl.ogl;
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113
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114 nk_buffer_init_default(&dev->cmds);
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115 dev->prog = glCreateProgram();
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116 dev->vert_shdr = glCreateShader(GL_VERTEX_SHADER);
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117 dev->frag_shdr = glCreateShader(GL_FRAGMENT_SHADER);
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118 glShaderSource(dev->vert_shdr, 1, &vertex_shader, 0);
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119 glShaderSource(dev->frag_shdr, 1, &fragment_shader, 0);
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120 glCompileShader(dev->vert_shdr);
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121 glCompileShader(dev->frag_shdr);
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122 glGetShaderiv(dev->vert_shdr, GL_COMPILE_STATUS, &status);
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123 assert(status == GL_TRUE);
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124 glGetShaderiv(dev->frag_shdr, GL_COMPILE_STATUS, &status);
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125 assert(status == GL_TRUE);
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126 glAttachShader(dev->prog, dev->vert_shdr);
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127 glAttachShader(dev->prog, dev->frag_shdr);
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128 glLinkProgram(dev->prog);
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129 glGetProgramiv(dev->prog, GL_LINK_STATUS, &status);
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130 assert(status == GL_TRUE);
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131
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132
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133 dev->uniform_tex = glGetUniformLocation(dev->prog, "Texture");
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134 dev->uniform_proj = glGetUniformLocation(dev->prog, "ProjMtx");
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135 dev->attrib_pos = glGetAttribLocation(dev->prog, "Position");
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136 dev->attrib_uv = glGetAttribLocation(dev->prog, "TexCoord");
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137 dev->attrib_col = glGetAttribLocation(dev->prog, "Color");
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138 {
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139 dev->vs = sizeof(struct nk_sdl_vertex);
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diff changeset
140 dev->vp = offsetof(struct nk_sdl_vertex, position);
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diff changeset
141 dev->vt = offsetof(struct nk_sdl_vertex, uv);
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diff changeset
142 dev->vc = offsetof(struct nk_sdl_vertex, col);
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diff changeset
143
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diff changeset
144 /* Allocate buffers */
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diff changeset
145 glGenBuffers(1, &dev->vbo);
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diff changeset
146 glGenBuffers(1, &dev->ebo);
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diff changeset
147 }
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diff changeset
148 glBindTexture(GL_TEXTURE_2D, 0);
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diff changeset
149 glBindBuffer(GL_ARRAY_BUFFER, 0);
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diff changeset
150 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
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diff changeset
151 }
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diff changeset
152
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diff changeset
153 NK_INTERN void
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diff changeset
154 nk_sdl_device_upload_atlas(const void *image, int width, int height)
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155 {
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diff changeset
156 struct nk_sdl_device *dev = &sdl.ogl;
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diff changeset
157 glGenTextures(1, &dev->font_tex);
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diff changeset
158 glBindTexture(GL_TEXTURE_2D, dev->font_tex);
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diff changeset
159 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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diff changeset
160 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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diff changeset
161 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0,
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diff changeset
162 GL_RGBA, GL_UNSIGNED_BYTE, image);
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163 }
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diff changeset
164
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165 NK_API void
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166 nk_sdl_device_destroy(void)
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diff changeset
167 {
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diff changeset
168 struct nk_sdl_device *dev = &sdl.ogl;
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diff changeset
169 glDetachShader(dev->prog, dev->vert_shdr);
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diff changeset
170 glDetachShader(dev->prog, dev->frag_shdr);
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diff changeset
171 glDeleteShader(dev->vert_shdr);
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diff changeset
172 glDeleteShader(dev->frag_shdr);
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173 glDeleteProgram(dev->prog);
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diff changeset
174 glDeleteTextures(1, &dev->font_tex);
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diff changeset
175 glDeleteBuffers(1, &dev->vbo);
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diff changeset
176 glDeleteBuffers(1, &dev->ebo);
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diff changeset
177 nk_buffer_free(&dev->cmds);
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diff changeset
178 }
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diff changeset
179
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diff changeset
180 NK_API void
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diff changeset
181 nk_sdl_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_buffer)
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182 {
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diff changeset
183 struct nk_sdl_device *dev = &sdl.ogl;
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diff changeset
184 int width, height;
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diff changeset
185 int display_width, display_height;
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diff changeset
186 struct nk_vec2 scale;
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diff changeset
187 GLfloat ortho[4][4] = {
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188 {2.0f, 0.0f, 0.0f, 0.0f},
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diff changeset
189 {0.0f,-2.0f, 0.0f, 0.0f},
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190 {0.0f, 0.0f,-1.0f, 0.0f},
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diff changeset
191 {-1.0f,1.0f, 0.0f, 1.0f},
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diff changeset
192 };
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diff changeset
193 SDL_GetWindowSize(sdl.win, &width, &height);
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diff changeset
194 SDL_GL_GetDrawableSize(sdl.win, &display_width, &display_height);
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diff changeset
195 ortho[0][0] /= (GLfloat)width;
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diff changeset
196 ortho[1][1] /= (GLfloat)height;
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diff changeset
197
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diff changeset
198 scale.x = (float)display_width/(float)width;
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diff changeset
199 scale.y = (float)display_height/(float)height;
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diff changeset
200
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diff changeset
201 /* setup global state */
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diff changeset
202 glViewport(0,0,display_width,display_height);
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diff changeset
203 glEnable(GL_BLEND);
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diff changeset
204 glBlendEquation(GL_FUNC_ADD);
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diff changeset
205 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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diff changeset
206 glDisable(GL_CULL_FACE);
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diff changeset
207 glDisable(GL_DEPTH_TEST);
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diff changeset
208 glEnable(GL_SCISSOR_TEST);
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diff changeset
209 glActiveTexture(GL_TEXTURE0);
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diff changeset
210
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diff changeset
211 /* setup program */
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diff changeset
212 glUseProgram(dev->prog);
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diff changeset
213 glUniform1i(dev->uniform_tex, 0);
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diff changeset
214 glUniformMatrix4fv(dev->uniform_proj, 1, GL_FALSE, &ortho[0][0]);
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diff changeset
215 {
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diff changeset
216 /* convert from command queue into draw list and draw to screen */
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diff changeset
217 const struct nk_draw_command *cmd;
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diff changeset
218 void *vertices, *elements;
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diff changeset
219 const nk_draw_index *offset = NULL;
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diff changeset
220
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diff changeset
221 /* Bind buffers */
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diff changeset
222 glBindBuffer(GL_ARRAY_BUFFER, dev->vbo);
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diff changeset
223 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, dev->ebo);
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diff changeset
224
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diff changeset
225 {
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diff changeset
226 /* buffer setup */
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diff changeset
227 glEnableVertexAttribArray((GLuint)dev->attrib_pos);
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diff changeset
228 glEnableVertexAttribArray((GLuint)dev->attrib_uv);
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diff changeset
229 glEnableVertexAttribArray((GLuint)dev->attrib_col);
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diff changeset
230
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diff changeset
231 glVertexAttribPointer((GLuint)dev->attrib_pos, 2, GL_FLOAT, GL_FALSE, dev->vs, (void*)dev->vp);
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diff changeset
232 glVertexAttribPointer((GLuint)dev->attrib_uv, 2, GL_FLOAT, GL_FALSE, dev->vs, (void*)dev->vt);
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diff changeset
233 glVertexAttribPointer((GLuint)dev->attrib_col, 4, GL_UNSIGNED_BYTE, GL_TRUE, dev->vs, (void*)dev->vc);
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diff changeset
234 }
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diff changeset
235
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diff changeset
236 glBufferData(GL_ARRAY_BUFFER, max_vertex_buffer, NULL, GL_STREAM_DRAW);
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diff changeset
237 glBufferData(GL_ELEMENT_ARRAY_BUFFER, max_element_buffer, NULL, GL_STREAM_DRAW);
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diff changeset
238
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diff changeset
239 /* load vertices/elements directly into vertex/element buffer */
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diff changeset
240 vertices = malloc((size_t)max_vertex_buffer);
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diff changeset
241 elements = malloc((size_t)max_element_buffer);
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diff changeset
242 {
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diff changeset
243 /* fill convert configuration */
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diff changeset
244 struct nk_convert_config config;
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diff changeset
245 static const struct nk_draw_vertex_layout_element vertex_layout[] = {
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diff changeset
246 {NK_VERTEX_POSITION, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sdl_vertex, position)},
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diff changeset
247 {NK_VERTEX_TEXCOORD, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_sdl_vertex, uv)},
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diff changeset
248 {NK_VERTEX_COLOR, NK_FORMAT_R8G8B8A8, NK_OFFSETOF(struct nk_sdl_vertex, col)},
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diff changeset
249 {NK_VERTEX_LAYOUT_END}
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diff changeset
250 };
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diff changeset
251 NK_MEMSET(&config, 0, sizeof(config));
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diff changeset
252 config.vertex_layout = vertex_layout;
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diff changeset
253 config.vertex_size = sizeof(struct nk_sdl_vertex);
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diff changeset
254 config.vertex_alignment = NK_ALIGNOF(struct nk_sdl_vertex);
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diff changeset
255 config.null = dev->null;
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diff changeset
256 config.circle_segment_count = 22;
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diff changeset
257 config.curve_segment_count = 22;
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diff changeset
258 config.arc_segment_count = 22;
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diff changeset
259 config.global_alpha = 1.0f;
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diff changeset
260 config.shape_AA = AA;
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diff changeset
261 config.line_AA = AA;
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diff changeset
262
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diff changeset
263 /* setup buffers to load vertices and elements */
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diff changeset
264 {struct nk_buffer vbuf, ebuf;
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diff changeset
265 nk_buffer_init_fixed(&vbuf, vertices, (nk_size)max_vertex_buffer);
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diff changeset
266 nk_buffer_init_fixed(&ebuf, elements, (nk_size)max_element_buffer);
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diff changeset
267 nk_convert(&sdl.ctx, &dev->cmds, &vbuf, &ebuf, &config);}
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diff changeset
268 }
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diff changeset
269 glBufferSubData(GL_ARRAY_BUFFER, 0, (size_t)max_vertex_buffer, vertices);
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diff changeset
270 glBufferSubData(GL_ELEMENT_ARRAY_BUFFER, 0, (size_t)max_element_buffer, elements);
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diff changeset
271 free(vertices);
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diff changeset
272 free(elements);
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diff changeset
273
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diff changeset
274 /* iterate over and execute each draw command */
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diff changeset
275 nk_draw_foreach(cmd, &sdl.ctx, &dev->cmds) {
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diff changeset
276 if (!cmd->elem_count) continue;
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diff changeset
277 glBindTexture(GL_TEXTURE_2D, (GLuint)cmd->texture.id);
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diff changeset
278 glScissor((GLint)(cmd->clip_rect.x * scale.x),
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diff changeset
279 (GLint)((height - (GLint)(cmd->clip_rect.y + cmd->clip_rect.h)) * scale.y),
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diff changeset
280 (GLint)(cmd->clip_rect.w * scale.x),
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diff changeset
281 (GLint)(cmd->clip_rect.h * scale.y));
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diff changeset
282 glDrawElements(GL_TRIANGLES, (GLsizei)cmd->elem_count, GL_UNSIGNED_SHORT, offset);
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diff changeset
283 offset += cmd->elem_count;
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diff changeset
284 }
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diff changeset
285 nk_clear(&sdl.ctx);
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diff changeset
286 }
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diff changeset
287
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diff changeset
288 glUseProgram(0);
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diff changeset
289 glBindBuffer(GL_ARRAY_BUFFER, 0);
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diff changeset
290 glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
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diff changeset
291
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diff changeset
292 glDisable(GL_BLEND);
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diff changeset
293 glDisable(GL_SCISSOR_TEST);
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diff changeset
294 }
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diff changeset
295
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diff changeset
296 static void
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diff changeset
297 nk_sdl_clipbard_paste(nk_handle usr, struct nk_text_edit *edit)
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diff changeset
298 {
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diff changeset
299 const char *text = SDL_GetClipboardText();
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diff changeset
300 if (text) nk_textedit_paste(edit, text, nk_strlen(text));
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diff changeset
301 (void)usr;
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diff changeset
302 }
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diff changeset
303
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diff changeset
304 static void
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diff changeset
305 nk_sdl_clipbard_copy(nk_handle usr, const char *text, int len)
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diff changeset
306 {
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diff changeset
307 char *str = 0;
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diff changeset
308 (void)usr;
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diff changeset
309 if (!len) return;
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diff changeset
310 str = (char*)malloc((size_t)len+1);
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diff changeset
311 if (!str) return;
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diff changeset
312 memcpy(str, text, (size_t)len);
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diff changeset
313 str[len] = '\0';
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diff changeset
314 SDL_SetClipboardText(str);
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diff changeset
315 free(str);
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diff changeset
316 }
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diff changeset
317
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diff changeset
318 NK_API struct nk_context*
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diff changeset
319 nk_sdl_init(SDL_Window *win)
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diff changeset
320 {
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diff changeset
321 sdl.win = win;
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diff changeset
322 nk_init_default(&sdl.ctx, 0);
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diff changeset
323 sdl.ctx.clip.copy = nk_sdl_clipbard_copy;
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diff changeset
324 sdl.ctx.clip.paste = nk_sdl_clipbard_paste;
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diff changeset
325 sdl.ctx.clip.userdata = nk_handle_ptr(0);
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diff changeset
326 nk_sdl_device_create();
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diff changeset
327 return &sdl.ctx;
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diff changeset
328 }
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diff changeset
329
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diff changeset
330 NK_API void
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diff changeset
331 nk_sdl_font_stash_begin(struct nk_font_atlas **atlas)
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diff changeset
332 {
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diff changeset
333 nk_font_atlas_init_default(&sdl.atlas);
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diff changeset
334 nk_font_atlas_begin(&sdl.atlas);
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diff changeset
335 *atlas = &sdl.atlas;
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diff changeset
336 }
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diff changeset
337
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diff changeset
338 NK_API void
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diff changeset
339 nk_sdl_font_stash_end(void)
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diff changeset
340 {
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diff changeset
341 const void *image; int w, h;
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diff changeset
342 image = nk_font_atlas_bake(&sdl.atlas, &w, &h, NK_FONT_ATLAS_RGBA32);
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diff changeset
343 nk_sdl_device_upload_atlas(image, w, h);
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diff changeset
344 nk_font_atlas_end(&sdl.atlas, nk_handle_id((int)sdl.ogl.font_tex), &sdl.ogl.null);
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diff changeset
345 if (sdl.atlas.default_font)
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diff changeset
346 nk_style_set_font(&sdl.ctx, &sdl.atlas.default_font->handle);
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diff changeset
347
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diff changeset
348 }
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diff changeset
349
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diff changeset
350 NK_API int
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diff changeset
351 nk_sdl_handle_event(SDL_Event *evt)
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diff changeset
352 {
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diff changeset
353 struct nk_context *ctx = &sdl.ctx;
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diff changeset
354 if (evt->type == SDL_KEYUP || evt->type == SDL_KEYDOWN) {
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diff changeset
355 /* key events */
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diff changeset
356 int down = evt->type == SDL_KEYDOWN;
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diff changeset
357 const Uint8* state = SDL_GetKeyboardState(0);
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diff changeset
358 SDL_Keycode sym = evt->key.keysym.sym;
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diff changeset
359 if (sym == SDLK_RSHIFT || sym == SDLK_LSHIFT)
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parents:
diff changeset
360 nk_input_key(ctx, NK_KEY_SHIFT, down);
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diff changeset
361 else if (sym == SDLK_DELETE)
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diff changeset
362 nk_input_key(ctx, NK_KEY_DEL, down);
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diff changeset
363 else if (sym == SDLK_RETURN)
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diff changeset
364 nk_input_key(ctx, NK_KEY_ENTER, down);
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parents:
diff changeset
365 else if (sym == SDLK_TAB)
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diff changeset
366 nk_input_key(ctx, NK_KEY_TAB, down);
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diff changeset
367 else if (sym == SDLK_BACKSPACE)
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diff changeset
368 nk_input_key(ctx, NK_KEY_BACKSPACE, down);
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parents:
diff changeset
369 else if (sym == SDLK_HOME) {
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diff changeset
370 nk_input_key(ctx, NK_KEY_TEXT_START, down);
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parents:
diff changeset
371 nk_input_key(ctx, NK_KEY_SCROLL_START, down);
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parents:
diff changeset
372 } else if (sym == SDLK_END) {
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diff changeset
373 nk_input_key(ctx, NK_KEY_TEXT_END, down);
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parents:
diff changeset
374 nk_input_key(ctx, NK_KEY_SCROLL_END, down);
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parents:
diff changeset
375 } else if (sym == SDLK_PAGEDOWN) {
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parents:
diff changeset
376 nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
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parents:
diff changeset
377 } else if (sym == SDLK_PAGEUP) {
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diff changeset
378 nk_input_key(ctx, NK_KEY_SCROLL_UP, down);
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parents:
diff changeset
379 } else if (sym == SDLK_z)
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parents:
diff changeset
380 nk_input_key(ctx, NK_KEY_TEXT_UNDO, down && state[SDL_SCANCODE_LCTRL]);
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parents:
diff changeset
381 else if (sym == SDLK_r)
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parents:
diff changeset
382 nk_input_key(ctx, NK_KEY_TEXT_REDO, down && state[SDL_SCANCODE_LCTRL]);
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parents:
diff changeset
383 else if (sym == SDLK_c)
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
384 nk_input_key(ctx, NK_KEY_COPY, down && state[SDL_SCANCODE_LCTRL]);
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parents:
diff changeset
385 else if (sym == SDLK_v)
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
386 nk_input_key(ctx, NK_KEY_PASTE, down && state[SDL_SCANCODE_LCTRL]);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
387 else if (sym == SDLK_x)
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
388 nk_input_key(ctx, NK_KEY_CUT, down && state[SDL_SCANCODE_LCTRL]);
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parents:
diff changeset
389 else if (sym == SDLK_b)
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
390 nk_input_key(ctx, NK_KEY_TEXT_LINE_START, down && state[SDL_SCANCODE_LCTRL]);
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parents:
diff changeset
391 else if (sym == SDLK_e)
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parents:
diff changeset
392 nk_input_key(ctx, NK_KEY_TEXT_LINE_END, down && state[SDL_SCANCODE_LCTRL]);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
393 else if (sym == SDLK_UP)
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
394 nk_input_key(ctx, NK_KEY_UP, down);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
395 else if (sym == SDLK_DOWN)
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parents:
diff changeset
396 nk_input_key(ctx, NK_KEY_DOWN, down);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
397 else if (sym == SDLK_LEFT) {
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
398 if (state[SDL_SCANCODE_LCTRL])
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
399 nk_input_key(ctx, NK_KEY_TEXT_WORD_LEFT, down);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
400 else nk_input_key(ctx, NK_KEY_LEFT, down);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
401 } else if (sym == SDLK_RIGHT) {
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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_RIGHT, down);
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
404 else nk_input_key(ctx, NK_KEY_RIGHT, down);
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Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
405 } else return 0;
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parents:
diff changeset
406 return 1;
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parents:
diff changeset
407 } else if (evt->type == SDL_MOUSEBUTTONDOWN || evt->type == SDL_MOUSEBUTTONUP) {
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
parents:
diff changeset
408 /* mouse button */
c5c022c7aa54 Initial work on Nuklear-based UI
Michael Pavone <pavone@retrodev.com>
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diff changeset
409 int down = evt->type == SDL_MOUSEBUTTONDOWN;
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410 const int x = evt->button.x, y = evt->button.y;
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411 if (evt->button.button == SDL_BUTTON_LEFT) {
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412 if (evt->button.clicks > 1)
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413 nk_input_button(ctx, NK_BUTTON_DOUBLE, x, y, down);
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414 nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
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415 } else if (evt->button.button == SDL_BUTTON_MIDDLE)
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416 nk_input_button(ctx, NK_BUTTON_MIDDLE, x, y, down);
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417 else if (evt->button.button == SDL_BUTTON_RIGHT)
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418 nk_input_button(ctx, NK_BUTTON_RIGHT, x, y, down);
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419 return 1;
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420 } else if (evt->type == SDL_MOUSEMOTION) {
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421 /* mouse motion */
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422 if (ctx->input.mouse.grabbed) {
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423 int x = (int)ctx->input.mouse.prev.x, y = (int)ctx->input.mouse.prev.y;
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424 nk_input_motion(ctx, x + evt->motion.xrel, y + evt->motion.yrel);
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425 } else nk_input_motion(ctx, evt->motion.x, evt->motion.y);
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426 return 1;
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427 } else if (evt->type == SDL_TEXTINPUT) {
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428 /* text input */
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429 nk_glyph glyph;
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430 memcpy(glyph, evt->text.text, NK_UTF_SIZE);
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431 nk_input_glyph(ctx, glyph);
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432 return 1;
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433 } else if (evt->type == SDL_MOUSEWHEEL) {
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434 /* mouse wheel */
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435 nk_input_scroll(ctx,nk_vec2((float)evt->wheel.x,(float)evt->wheel.y));
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436 return 1;
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437 }
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438 return 0;
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439 }
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440
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441 NK_API
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442 void nk_sdl_shutdown(void)
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443 {
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444 nk_font_atlas_clear(&sdl.atlas);
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445 nk_free(&sdl.ctx);
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446 nk_sdl_device_destroy();
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447 memset(&sdl, 0, sizeof(sdl));
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448 }
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449
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450 #endif