744 lines
27 KiB
C
744 lines
27 KiB
C
/*
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* Nuklear - v1.17 - public domain
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* no warrenty implied; use at your own risk.
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* authored from 2015-2016 by Micha Mettke
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*/
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/*
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* ==============================================================
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*
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* API
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*
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* ===============================================================
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*/
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#ifndef NK_XLIB_GL3_H_
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#define NK_XLIB_GL3_H_
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#include <X11/Xlib.h>
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NK_API struct nk_context* nk_x11_init(Display *dpy, Window win);
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NK_API void nk_x11_font_stash_begin(struct nk_font_atlas **atlas);
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NK_API void nk_x11_font_stash_end(void);
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NK_API int nk_x11_handle_event(XEvent *evt);
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NK_API void nk_x11_render(enum nk_anti_aliasing, int max_vertex_buffer, int max_element_buffer);
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NK_API void nk_x11_shutdown(void);
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NK_API int nk_x11_device_create(void);
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NK_API void nk_x11_device_destroy(void);
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#endif
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/*
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* ==============================================================
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*
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* IMPLEMENTATION
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*
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* ===============================================================
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*/
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#ifdef NK_XLIB_GL3_IMPLEMENTATION
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <time.h>
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <X11/Xresource.h>
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#include <X11/Xlocale.h>
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#include <GL/gl.h>
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#include <GL/glx.h>
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#ifndef NK_X11_DOUBLE_CLICK_LO
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#define NK_X11_DOUBLE_CLICK_LO 20
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#endif
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#ifndef NK_X11_DOUBLE_CLICK_HI
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#define NK_X11_DOUBLE_CLICK_HI 200
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#endif
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#ifdef NK_XLIB_LOAD_OPENGL_EXTENSIONS
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#include <GL/glxext.h>
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/* GL_ARB_vertex_buffer_object */
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typedef void(*nkglGenBuffers)(GLsizei, GLuint*);
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typedef void(*nkglBindBuffer)(GLenum, GLuint);
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typedef void(*nkglBufferData)(GLenum, GLsizeiptr, const GLvoid*, GLenum);
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typedef void(*nkglBufferSubData)(GLenum, GLintptr, GLsizeiptr, const GLvoid*);
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typedef void*(*nkglMapBuffer)(GLenum, GLenum);
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typedef GLboolean(*nkglUnmapBuffer)(GLenum);
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typedef void(*nkglDeleteBuffers)(GLsizei, GLuint*);
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/* GL_ARB_vertex_array_object */
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typedef void (*nkglGenVertexArrays)(GLsizei, GLuint*);
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typedef void (*nkglBindVertexArray)(GLuint);
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typedef void (*nkglDeleteVertexArrays)(GLsizei, const GLuint*);
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/* GL_ARB_vertex_program / GL_ARB_fragment_program */
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typedef void(*nkglVertexAttribPointer)(GLuint, GLint, GLenum, GLboolean, GLsizei, const GLvoid*);
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typedef void(*nkglEnableVertexAttribArray)(GLuint);
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typedef void(*nkglDisableVertexAttribArray)(GLuint);
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/* GL_ARB_framebuffer_object */
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typedef void(*nkglGenerateMipmap)(GLenum target);
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/* GLSL/OpenGL 2.0 core */
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typedef GLuint(*nkglCreateShader)(GLenum);
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typedef void(*nkglShaderSource)(GLuint, GLsizei, const GLchar**, const GLint*);
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typedef void(*nkglCompileShader)(GLuint);
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typedef void(*nkglGetShaderiv)(GLuint, GLenum, GLint*);
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typedef void(*nkglGetShaderInfoLog)(GLuint, GLsizei, GLsizei*, GLchar*);
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typedef void(*nkglDeleteShader)(GLuint);
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typedef GLuint(*nkglCreateProgram)(void);
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typedef void(*nkglAttachShader)(GLuint, GLuint);
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typedef void(*nkglDetachShader)(GLuint, GLuint);
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typedef void(*nkglLinkProgram)(GLuint);
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typedef void(*nkglUseProgram)(GLuint);
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typedef void(*nkglGetProgramiv)(GLuint, GLenum, GLint*);
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typedef void(*nkglGetProgramInfoLog)(GLuint, GLsizei, GLsizei*, GLchar*);
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typedef void(*nkglDeleteProgram)(GLuint);
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typedef GLint(*nkglGetUniformLocation)(GLuint, const GLchar*);
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typedef GLint(*nkglGetAttribLocation)(GLuint, const GLchar*);
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typedef void(*nkglUniform1i)(GLint, GLint);
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typedef void(*nkglUniform1f)(GLint, GLfloat);
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typedef void(*nkglUniformMatrix3fv)(GLint, GLsizei, GLboolean, const GLfloat*);
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typedef void(*nkglUniformMatrix4fv)(GLint, GLsizei, GLboolean, const GLfloat*);
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static nkglGenBuffers glGenBuffers;
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static nkglBindBuffer glBindBuffer;
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static nkglBufferData glBufferData;
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static nkglBufferSubData glBufferSubData;
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static nkglMapBuffer glMapBuffer;
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static nkglUnmapBuffer glUnmapBuffer;
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static nkglDeleteBuffers glDeleteBuffers;
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static nkglGenVertexArrays glGenVertexArrays;
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static nkglBindVertexArray glBindVertexArray;
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static nkglDeleteVertexArrays glDeleteVertexArrays;
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static nkglVertexAttribPointer glVertexAttribPointer;
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static nkglEnableVertexAttribArray glEnableVertexAttribArray;
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static nkglDisableVertexAttribArray glDisableVertexAttribArray;
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static nkglGenerateMipmap glGenerateMipmap;
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static nkglCreateShader glCreateShader;
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static nkglShaderSource glShaderSource;
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static nkglCompileShader glCompileShader;
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static nkglGetShaderiv glGetShaderiv;
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static nkglGetShaderInfoLog glGetShaderInfoLog;
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static nkglDeleteShader glDeleteShader;
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static nkglCreateProgram glCreateProgram;
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static nkglAttachShader glAttachShader;
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static nkglDetachShader glDetachShader;
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static nkglLinkProgram glLinkProgram;
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static nkglUseProgram glUseProgram;
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static nkglGetProgramiv glGetProgramiv;
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static nkglGetProgramInfoLog glGetProgramInfoLog;
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static nkglDeleteProgram glDeleteProgram;
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static nkglGetUniformLocation glGetUniformLocation;
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static nkglGetAttribLocation glGetAttribLocation;
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static nkglUniform1i glUniform1i;
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static nkglUniform1f glUniform1f;
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static nkglUniformMatrix3fv glUniformMatrix3fv;
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static nkglUniformMatrix4fv glUniformMatrix4fv;
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enum graphics_card_vendors {
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VENDOR_UNKNOWN,
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VENDOR_NVIDIA,
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VENDOR_AMD,
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VENDOR_INTEL
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};
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struct opengl_info {
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/* info */
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const char *vendor_str;
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const char *version_str;
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const char *extensions_str;
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const char *renderer_str;
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const char *glsl_version_str;
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enum graphics_card_vendors vendor;
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/* version */
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float version;
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int major_version;
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int minor_version;
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/* extensions */
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int glsl_available;
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int vertex_buffer_obj_available;
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int vertex_array_obj_available;
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int map_buffer_range_available;
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int fragment_program_available;
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int frame_buffer_object_available;
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};
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#endif
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struct nk_x11_vertex {
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float position[2];
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float uv[2];
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nk_byte col[4];
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};
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struct nk_x11_device {
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#ifdef NK_XLIB_LOAD_OPENGL_EXTENSIONS
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struct opengl_info info;
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#endif
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struct nk_buffer cmds;
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struct nk_draw_null_texture null;
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GLuint vbo, vao, ebo;
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GLuint prog;
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GLuint vert_shdr;
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GLuint frag_shdr;
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GLint attrib_pos;
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GLint attrib_uv;
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GLint attrib_col;
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GLint uniform_tex;
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GLint uniform_proj;
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GLuint font_tex;
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};
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static struct nk_x11 {
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struct nk_x11_device ogl;
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struct nk_context ctx;
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struct nk_font_atlas atlas;
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Cursor cursor;
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Display *dpy;
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Window win;
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long last_button_click;
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} x11;
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#ifdef __APPLE__
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#define NK_SHADER_VERSION "#version 150\n"
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#else
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#define NK_SHADER_VERSION "#version 300 es\n"
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#endif
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#ifdef NK_XLIB_LOAD_OPENGL_EXTENSIONS
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#include <GL/glx.h>
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NK_INTERN long
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nk_timestamp(void)
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{
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struct timeval tv;
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if (gettimeofday(&tv, NULL) < 0) return 0;
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return (long)((long)tv.tv_sec * 1000 + (long)tv.tv_usec/1000);
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}
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NK_INTERN int
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nk_x11_stricmpn(const char *a, const char *b, int len)
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{
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int i = 0;
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for (i = 0; i < len && a[i] && b[i]; ++i)
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if (a[i] != b[i]) return 1;
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if (i != len) return 1;
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return 0;
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}
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NK_INTERN int
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nk_x11_check_extension(struct opengl_info *GL, const char *ext)
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{
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const char *start, *where, *term;
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where = strchr(ext, ' ');
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if (where || *ext == '\0')
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return nk_false;
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for (start = GL->extensions_str;;) {
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where = strstr((const char*)start, ext);
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if (!where) break;
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term = where + strlen(ext);
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if (where == start || *(where - 1) == ' ') {
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if (*term == ' ' || *term == '\0')
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return nk_true;
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}
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start = term;
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}
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return nk_false;
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}
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#define GL_EXT(name) (nk##name)nk_gl_ext(#name)
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NK_INTERN __GLXextFuncPtr
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nk_gl_ext(const char *name)
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{
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__GLXextFuncPtr func;
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func = glXGetProcAddress((const GLubyte*)name);
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if (!func) {
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fprintf(stdout, "[GL]: failed to load extension: %s", name);
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return NULL;
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}
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return func;
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}
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NK_INTERN int
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nk_load_opengl(struct opengl_info *gl)
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{
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int failed = nk_false;
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gl->version_str = (const char*)glGetString(GL_VERSION);
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glGetIntegerv(GL_MAJOR_VERSION, &gl->major_version);
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glGetIntegerv(GL_MINOR_VERSION, &gl->minor_version);
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if (gl->major_version < 2) {
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fprintf(stderr, "[GL]: Graphics card does not fullfill minimum OpenGL 2.0 support\n");
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return 0;
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}
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gl->version = (float)gl->major_version + (float)gl->minor_version * 0.1f;
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gl->renderer_str = (const char*)glGetString(GL_RENDERER);
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gl->extensions_str = (const char*)glGetString(GL_EXTENSIONS);
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gl->glsl_version_str = (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION);
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gl->vendor_str = (const char*)glGetString(GL_VENDOR);
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if (!nk_x11_stricmpn(gl->vendor_str, "ATI", 4) ||
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!nk_x11_stricmpn(gl->vendor_str, "AMD", 4))
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gl->vendor = VENDOR_AMD;
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else if (!nk_x11_stricmpn(gl->vendor_str, "NVIDIA", 6))
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gl->vendor = VENDOR_NVIDIA;
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else if (!nk_x11_stricmpn(gl->vendor_str, "Intel", 5))
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gl->vendor = VENDOR_INTEL;
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else gl->vendor = VENDOR_UNKNOWN;
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/* Extensions */
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gl->glsl_available = (gl->version >= 2.0f);
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if (gl->glsl_available) {
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/* GLSL core in OpenGL > 2 */
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glCreateShader = GL_EXT(glCreateShader);
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glShaderSource = GL_EXT(glShaderSource);
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glCompileShader = GL_EXT(glCompileShader);
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glGetShaderiv = GL_EXT(glGetShaderiv);
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glGetShaderInfoLog = GL_EXT(glGetShaderInfoLog);
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glDeleteShader = GL_EXT(glDeleteShader);
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glCreateProgram = GL_EXT(glCreateProgram);
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glAttachShader = GL_EXT(glAttachShader);
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glDetachShader = GL_EXT(glDetachShader);
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glLinkProgram = GL_EXT(glLinkProgram);
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glUseProgram = GL_EXT(glUseProgram);
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glGetProgramiv = GL_EXT(glGetProgramiv);
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glGetProgramInfoLog = GL_EXT(glGetProgramInfoLog);
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glDeleteProgram = GL_EXT(glDeleteProgram);
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glGetUniformLocation = GL_EXT(glGetUniformLocation);
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glGetAttribLocation = GL_EXT(glGetAttribLocation);
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glUniform1i = GL_EXT(glUniform1i);
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glUniform1f = GL_EXT(glUniform1f);
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glUniformMatrix3fv = GL_EXT(glUniformMatrix3fv);
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glUniformMatrix4fv = GL_EXT(glUniformMatrix4fv);
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}
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gl->vertex_buffer_obj_available = nk_x11_check_extension(gl, "GL_ARB_vertex_buffer_object");
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if (gl->vertex_buffer_obj_available) {
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/* GL_ARB_vertex_buffer_object */
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glGenBuffers = GL_EXT(glGenBuffers);
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glBindBuffer = GL_EXT(glBindBuffer);
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glBufferData = GL_EXT(glBufferData);
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glBufferSubData = GL_EXT(glBufferSubData);
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glMapBuffer = GL_EXT(glMapBuffer);
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glUnmapBuffer = GL_EXT(glUnmapBuffer);
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glDeleteBuffers = GL_EXT(glDeleteBuffers);
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}
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gl->fragment_program_available = nk_x11_check_extension(gl, "GL_ARB_fragment_program");
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if (gl->fragment_program_available) {
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/* GL_ARB_vertex_program / GL_ARB_fragment_program */
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glVertexAttribPointer = GL_EXT(glVertexAttribPointer);
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glEnableVertexAttribArray = GL_EXT(glEnableVertexAttribArray);
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glDisableVertexAttribArray = GL_EXT(glDisableVertexAttribArray);
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}
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gl->vertex_array_obj_available = nk_x11_check_extension(gl, "GL_ARB_vertex_array_object");
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if (gl->vertex_array_obj_available) {
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/* GL_ARB_vertex_array_object */
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glGenVertexArrays = GL_EXT(glGenVertexArrays);
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glBindVertexArray = GL_EXT(glBindVertexArray);
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glDeleteVertexArrays = GL_EXT(glDeleteVertexArrays);
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}
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gl->frame_buffer_object_available = nk_x11_check_extension(gl, "GL_ARB_framebuffer_object");
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if (gl->frame_buffer_object_available) {
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/* GL_ARB_framebuffer_object */
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glGenerateMipmap = GL_EXT(glGenerateMipmap);
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}
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if (!gl->vertex_buffer_obj_available) {
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fprintf(stdout, "[GL] Error: GL_ARB_vertex_buffer_object is not available!\n");
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failed = nk_true;
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}
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if (!gl->fragment_program_available) {
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fprintf(stdout, "[GL] Error: GL_ARB_fragment_program is not available!\n");
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failed = nk_true;
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}
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if (!gl->vertex_array_obj_available) {
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fprintf(stdout, "[GL] Error: GL_ARB_vertex_array_object is not available!\n");
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failed = nk_true;
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}
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if (!gl->frame_buffer_object_available) {
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fprintf(stdout, "[GL] Error: GL_ARB_framebuffer_object is not available!\n");
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failed = nk_true;
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}
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return !failed;
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}
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#endif
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NK_API int
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nk_x11_device_create(void)
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{
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GLint status;
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static const GLchar *vertex_shader =
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NK_SHADER_VERSION
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"uniform mat4 ProjMtx;\n"
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"in vec2 Position;\n"
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"in vec2 TexCoord;\n"
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"in vec4 Color;\n"
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"out vec2 Frag_UV;\n"
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"out vec4 Frag_Color;\n"
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"void main() {\n"
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" Frag_UV = TexCoord;\n"
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" Frag_Color = Color;\n"
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" gl_Position = ProjMtx * vec4(Position.xy, 0, 1);\n"
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"}\n";
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static const GLchar *fragment_shader =
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NK_SHADER_VERSION
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"precision mediump float;\n"
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"uniform sampler2D Texture;\n"
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"in vec2 Frag_UV;\n"
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"in vec4 Frag_Color;\n"
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"out vec4 Out_Color;\n"
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"void main(){\n"
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" Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n"
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"}\n";
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struct nk_x11_device *dev = &x11.ogl;
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#ifdef NK_XLIB_LOAD_OPENGL_EXTENSIONS
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if (!nk_load_opengl(&dev->info)) return 0;
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#endif
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nk_buffer_init_default(&dev->cmds);
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dev->prog = glCreateProgram();
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dev->vert_shdr = glCreateShader(GL_VERTEX_SHADER);
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dev->frag_shdr = glCreateShader(GL_FRAGMENT_SHADER);
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glShaderSource(dev->vert_shdr, 1, &vertex_shader, 0);
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glShaderSource(dev->frag_shdr, 1, &fragment_shader, 0);
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glCompileShader(dev->vert_shdr);
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glCompileShader(dev->frag_shdr);
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glGetShaderiv(dev->vert_shdr, GL_COMPILE_STATUS, &status);
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assert(status == GL_TRUE);
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glGetShaderiv(dev->frag_shdr, GL_COMPILE_STATUS, &status);
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assert(status == GL_TRUE);
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glAttachShader(dev->prog, dev->vert_shdr);
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glAttachShader(dev->prog, dev->frag_shdr);
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glLinkProgram(dev->prog);
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glGetProgramiv(dev->prog, GL_LINK_STATUS, &status);
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assert(status == GL_TRUE);
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dev->uniform_tex = glGetUniformLocation(dev->prog, "Texture");
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dev->uniform_proj = glGetUniformLocation(dev->prog, "ProjMtx");
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dev->attrib_pos = glGetAttribLocation(dev->prog, "Position");
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dev->attrib_uv = glGetAttribLocation(dev->prog, "TexCoord");
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dev->attrib_col = glGetAttribLocation(dev->prog, "Color");
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{
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/* buffer setup */
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GLsizei vs = sizeof(struct nk_x11_vertex);
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size_t vp = offsetof(struct nk_x11_vertex, position);
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size_t vt = offsetof(struct nk_x11_vertex, uv);
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size_t vc = offsetof(struct nk_x11_vertex, col);
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glGenBuffers(1, &dev->vbo);
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glGenBuffers(1, &dev->ebo);
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glGenVertexArrays(1, &dev->vao);
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glBindVertexArray(dev->vao);
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glBindBuffer(GL_ARRAY_BUFFER, dev->vbo);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, dev->ebo);
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glEnableVertexAttribArray((GLuint)dev->attrib_pos);
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glEnableVertexAttribArray((GLuint)dev->attrib_uv);
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glEnableVertexAttribArray((GLuint)dev->attrib_col);
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glVertexAttribPointer((GLuint)dev->attrib_pos, 2, GL_FLOAT, GL_FALSE, vs, (void*)vp);
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glVertexAttribPointer((GLuint)dev->attrib_uv, 2, GL_FLOAT, GL_FALSE, vs, (void*)vt);
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glVertexAttribPointer((GLuint)dev->attrib_col, 4, GL_UNSIGNED_BYTE, GL_TRUE, vs, (void*)vc);
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}
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glBindTexture(GL_TEXTURE_2D, 0);
|
|
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
|
|
glBindVertexArray(0);
|
|
return 1;
|
|
}
|
|
|
|
NK_INTERN void
|
|
nk_x11_device_upload_atlas(const void *image, int width, int height)
|
|
{
|
|
struct nk_x11_device *dev = &x11.ogl;
|
|
glGenTextures(1, &dev->font_tex);
|
|
glBindTexture(GL_TEXTURE_2D, dev->font_tex);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
|
|
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, (GLsizei)width, (GLsizei)height, 0,
|
|
GL_RGBA, GL_UNSIGNED_BYTE, image);
|
|
}
|
|
|
|
NK_API void
|
|
nk_x11_device_destroy(void)
|
|
{
|
|
struct nk_x11_device *dev = &x11.ogl;
|
|
glDetachShader(dev->prog, dev->vert_shdr);
|
|
glDetachShader(dev->prog, dev->frag_shdr);
|
|
glDeleteShader(dev->vert_shdr);
|
|
glDeleteShader(dev->frag_shdr);
|
|
glDeleteProgram(dev->prog);
|
|
glDeleteTextures(1, &dev->font_tex);
|
|
glDeleteBuffers(1, &dev->vbo);
|
|
glDeleteBuffers(1, &dev->ebo);
|
|
nk_buffer_free(&dev->cmds);
|
|
}
|
|
|
|
NK_API void
|
|
nk_x11_render(enum nk_anti_aliasing AA, int max_vertex_buffer, int max_element_buffer)
|
|
{
|
|
int width, height;
|
|
XWindowAttributes attr;
|
|
struct nk_x11_device *dev = &x11.ogl;
|
|
GLfloat ortho[4][4] = {
|
|
{2.0f, 0.0f, 0.0f, 0.0f},
|
|
{0.0f,-2.0f, 0.0f, 0.0f},
|
|
{0.0f, 0.0f,-1.0f, 0.0f},
|
|
{-1.0f,1.0f, 0.0f, 1.0f},
|
|
};
|
|
XGetWindowAttributes(x11.dpy, x11.win, &attr);
|
|
width = attr.width;
|
|
height = attr.height;
|
|
|
|
ortho[0][0] /= (GLfloat)width;
|
|
ortho[1][1] /= (GLfloat)height;
|
|
|
|
/* setup global state */
|
|
glEnable(GL_BLEND);
|
|
glBlendEquation(GL_FUNC_ADD);
|
|
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
glDisable(GL_CULL_FACE);
|
|
glDisable(GL_DEPTH_TEST);
|
|
glEnable(GL_SCISSOR_TEST);
|
|
glActiveTexture(GL_TEXTURE0);
|
|
|
|
/* setup program */
|
|
glUseProgram(dev->prog);
|
|
glUniform1i(dev->uniform_tex, 0);
|
|
glUniformMatrix4fv(dev->uniform_proj, 1, GL_FALSE, &ortho[0][0]);
|
|
glViewport(0,0,(GLsizei)width,(GLsizei)height);
|
|
{
|
|
/* convert from command queue into draw list and draw to screen */
|
|
const struct nk_draw_command *cmd;
|
|
void *vertices, *elements;
|
|
const nk_draw_index *offset = NULL;
|
|
|
|
/* allocate vertex and element buffer */
|
|
glBindVertexArray(dev->vao);
|
|
glBindBuffer(GL_ARRAY_BUFFER, dev->vbo);
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, dev->ebo);
|
|
|
|
glBufferData(GL_ARRAY_BUFFER, max_vertex_buffer, NULL, GL_STREAM_DRAW);
|
|
glBufferData(GL_ELEMENT_ARRAY_BUFFER, max_element_buffer, NULL, GL_STREAM_DRAW);
|
|
|
|
/* load draw vertices & elements directly into vertex + element buffer */
|
|
vertices = glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
|
|
elements = glMapBuffer(GL_ELEMENT_ARRAY_BUFFER, GL_WRITE_ONLY);
|
|
{
|
|
/* fill convert configuration */
|
|
struct nk_convert_config config;
|
|
static const struct nk_draw_vertex_layout_element vertex_layout[] = {
|
|
{NK_VERTEX_POSITION, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_x11_vertex, position)},
|
|
{NK_VERTEX_TEXCOORD, NK_FORMAT_FLOAT, NK_OFFSETOF(struct nk_x11_vertex, uv)},
|
|
{NK_VERTEX_COLOR, NK_FORMAT_R8G8B8A8, NK_OFFSETOF(struct nk_x11_vertex, col)},
|
|
{NK_VERTEX_LAYOUT_END}
|
|
};
|
|
NK_MEMSET(&config, 0, sizeof(config));
|
|
config.vertex_layout = vertex_layout;
|
|
config.vertex_size = sizeof(struct nk_x11_vertex);
|
|
config.vertex_alignment = NK_ALIGNOF(struct nk_x11_vertex);
|
|
config.null = dev->null;
|
|
config.circle_segment_count = 22;
|
|
config.curve_segment_count = 22;
|
|
config.arc_segment_count = 22;
|
|
config.global_alpha = 1.0f;
|
|
config.shape_AA = AA;
|
|
config.line_AA = AA;
|
|
|
|
/* setup buffers to load vertices and elements */
|
|
{struct nk_buffer vbuf, ebuf;
|
|
nk_buffer_init_fixed(&vbuf, vertices, (size_t)max_vertex_buffer);
|
|
nk_buffer_init_fixed(&ebuf, elements, (size_t)max_element_buffer);
|
|
nk_convert(&x11.ctx, &dev->cmds, &vbuf, &ebuf, &config);}
|
|
}
|
|
glUnmapBuffer(GL_ARRAY_BUFFER);
|
|
glUnmapBuffer(GL_ELEMENT_ARRAY_BUFFER);
|
|
|
|
/* iterate over and execute each draw command */
|
|
nk_draw_foreach(cmd, &x11.ctx, &dev->cmds)
|
|
{
|
|
if (!cmd->elem_count) continue;
|
|
glBindTexture(GL_TEXTURE_2D, (GLuint)cmd->texture.id);
|
|
glScissor(
|
|
(GLint)(cmd->clip_rect.x),
|
|
(GLint)((height - (GLint)(cmd->clip_rect.y + cmd->clip_rect.h))),
|
|
(GLint)(cmd->clip_rect.w),
|
|
(GLint)(cmd->clip_rect.h));
|
|
glDrawElements(GL_TRIANGLES, (GLsizei)cmd->elem_count, GL_UNSIGNED_SHORT, offset);
|
|
offset += cmd->elem_count;
|
|
}
|
|
nk_clear(&x11.ctx);
|
|
}
|
|
|
|
/* default OpenGL state */
|
|
glUseProgram(0);
|
|
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
|
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
|
|
glBindVertexArray(0);
|
|
glDisable(GL_BLEND);
|
|
glDisable(GL_SCISSOR_TEST);
|
|
}
|
|
|
|
NK_API void
|
|
nk_x11_font_stash_begin(struct nk_font_atlas **atlas)
|
|
{
|
|
nk_font_atlas_init_default(&x11.atlas);
|
|
nk_font_atlas_begin(&x11.atlas);
|
|
*atlas = &x11.atlas;
|
|
}
|
|
|
|
NK_API void
|
|
nk_x11_font_stash_end(void)
|
|
{
|
|
const void *image; int w, h;
|
|
image = nk_font_atlas_bake(&x11.atlas, &w, &h, NK_FONT_ATLAS_RGBA32);
|
|
nk_x11_device_upload_atlas(image, w, h);
|
|
nk_font_atlas_end(&x11.atlas, nk_handle_id((int)x11.ogl.font_tex), &x11.ogl.null);
|
|
if (x11.atlas.default_font)
|
|
nk_style_set_font(&x11.ctx, &x11.atlas.default_font->handle);
|
|
}
|
|
|
|
NK_API int
|
|
nk_x11_handle_event(XEvent *evt)
|
|
{
|
|
struct nk_context *ctx = &x11.ctx;
|
|
|
|
/* optional grabbing behavior */
|
|
if (ctx->input.mouse.grab) {
|
|
XDefineCursor(x11.dpy, x11.win, x11.cursor);
|
|
ctx->input.mouse.grab = 0;
|
|
} else if (ctx->input.mouse.ungrab) {
|
|
XWarpPointer(x11.dpy, None, x11.win, 0, 0, 0, 0,
|
|
(int)ctx->input.mouse.pos.x, (int)ctx->input.mouse.pos.y);
|
|
XUndefineCursor(x11.dpy, x11.win);
|
|
ctx->input.mouse.ungrab = 0;
|
|
}
|
|
|
|
if (evt->type == KeyPress || evt->type == KeyRelease)
|
|
{
|
|
/* Key handler */
|
|
int ret, down = (evt->type == KeyPress);
|
|
KeySym *code = XGetKeyboardMapping(x11.dpy, (KeyCode)evt->xkey.keycode, 1, &ret);
|
|
if (*code == XK_Shift_L || *code == XK_Shift_R) nk_input_key(ctx, NK_KEY_SHIFT, down);
|
|
else if (*code == XK_Delete) nk_input_key(ctx, NK_KEY_DEL, down);
|
|
else if (*code == XK_Return) nk_input_key(ctx, NK_KEY_ENTER, down);
|
|
else if (*code == XK_Tab) nk_input_key(ctx, NK_KEY_TAB, down);
|
|
else if (*code == XK_Left) nk_input_key(ctx, NK_KEY_LEFT, down);
|
|
else if (*code == XK_Right) nk_input_key(ctx, NK_KEY_RIGHT, down);
|
|
else if (*code == XK_Up) nk_input_key(ctx, NK_KEY_UP, down);
|
|
else if (*code == XK_Down) nk_input_key(ctx, NK_KEY_DOWN, down);
|
|
else if (*code == XK_BackSpace) nk_input_key(ctx, NK_KEY_BACKSPACE, down);
|
|
else if (*code == XK_space && !down) nk_input_char(ctx, ' ');
|
|
else if (*code == XK_Page_Up) nk_input_key(ctx, NK_KEY_SCROLL_UP, down);
|
|
else if (*code == XK_Page_Down) nk_input_key(ctx, NK_KEY_SCROLL_DOWN, down);
|
|
else if (*code == XK_Home) {
|
|
nk_input_key(ctx, NK_KEY_TEXT_START, down);
|
|
nk_input_key(ctx, NK_KEY_SCROLL_START, down);
|
|
} else if (*code == XK_End) {
|
|
nk_input_key(ctx, NK_KEY_TEXT_END, down);
|
|
nk_input_key(ctx, NK_KEY_SCROLL_END, down);
|
|
} else {
|
|
if (*code == 'c' && (evt->xkey.state & ControlMask))
|
|
nk_input_key(ctx, NK_KEY_COPY, down);
|
|
else if (*code == 'v' && (evt->xkey.state & ControlMask))
|
|
nk_input_key(ctx, NK_KEY_PASTE, down);
|
|
else if (*code == 'x' && (evt->xkey.state & ControlMask))
|
|
nk_input_key(ctx, NK_KEY_CUT, down);
|
|
else if (*code == 'z' && (evt->xkey.state & ControlMask))
|
|
nk_input_key(ctx, NK_KEY_TEXT_UNDO, down);
|
|
else if (*code == 'r' && (evt->xkey.state & ControlMask))
|
|
nk_input_key(ctx, NK_KEY_TEXT_REDO, down);
|
|
else if (*code == XK_Left && (evt->xkey.state & ControlMask))
|
|
nk_input_key(ctx, NK_KEY_TEXT_WORD_LEFT, down);
|
|
else if (*code == XK_Right && (evt->xkey.state & ControlMask))
|
|
nk_input_key(ctx, NK_KEY_TEXT_WORD_RIGHT, down);
|
|
else if (*code == 'b' && (evt->xkey.state & ControlMask))
|
|
nk_input_key(ctx, NK_KEY_TEXT_LINE_START, down);
|
|
else if (*code == 'e' && (evt->xkey.state & ControlMask))
|
|
nk_input_key(ctx, NK_KEY_TEXT_LINE_END, down);
|
|
else {
|
|
if (*code == 'i')
|
|
nk_input_key(ctx, NK_KEY_TEXT_INSERT_MODE, down);
|
|
else if (*code == 'r')
|
|
nk_input_key(ctx, NK_KEY_TEXT_REPLACE_MODE, down);
|
|
if (down) {
|
|
char buf[32];
|
|
KeySym keysym = 0;
|
|
if (XLookupString((XKeyEvent*)evt, buf, 32, &keysym, NULL) != NoSymbol)
|
|
nk_input_glyph(ctx, buf);
|
|
}
|
|
}
|
|
}
|
|
XFree(code);
|
|
return 1;
|
|
} else if (evt->type == ButtonPress || evt->type == ButtonRelease) {
|
|
/* Button handler */
|
|
int down = (evt->type == ButtonPress);
|
|
const int x = evt->xbutton.x, y = evt->xbutton.y;
|
|
if (evt->xbutton.button == Button1) {
|
|
if (down) { /* Double-Click Button handler */
|
|
long dt = nk_timestamp() - x11.last_button_click;
|
|
if (dt > NK_X11_DOUBLE_CLICK_LO && dt < NK_X11_DOUBLE_CLICK_HI)
|
|
nk_input_button(ctx, NK_BUTTON_DOUBLE, x, y, nk_true);
|
|
x11.last_button_click = nk_timestamp();
|
|
} else nk_input_button(ctx, NK_BUTTON_DOUBLE, x, y, nk_false);
|
|
nk_input_button(ctx, NK_BUTTON_LEFT, x, y, down);
|
|
} else if (evt->xbutton.button == Button2)
|
|
nk_input_button(ctx, NK_BUTTON_MIDDLE, x, y, down);
|
|
else if (evt->xbutton.button == Button3)
|
|
nk_input_button(ctx, NK_BUTTON_RIGHT, x, y, down);
|
|
else if (evt->xbutton.button == Button4)
|
|
nk_input_scroll(ctx, nk_vec2(0,1.0f));
|
|
else if (evt->xbutton.button == Button5)
|
|
nk_input_scroll(ctx, nk_vec2(0,-1.0f));
|
|
else return 0;
|
|
return 1;
|
|
} else if (evt->type == MotionNotify) {
|
|
/* Mouse motion handler */
|
|
const int x = evt->xmotion.x, y = evt->xmotion.y;
|
|
nk_input_motion(ctx, x, y);
|
|
if (ctx->input.mouse.grabbed) {
|
|
ctx->input.mouse.pos.x = ctx->input.mouse.prev.x;
|
|
ctx->input.mouse.pos.y = ctx->input.mouse.prev.y;
|
|
XWarpPointer(x11.dpy, None, x11.win, 0, 0, 0, 0, (int)ctx->input.mouse.pos.x, (int)ctx->input.mouse.pos.y);
|
|
}
|
|
return 1;
|
|
} else if (evt->type == KeymapNotify) {
|
|
XRefreshKeyboardMapping(&evt->xmapping);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
NK_API struct nk_context*
|
|
nk_x11_init(Display *dpy, Window win)
|
|
{
|
|
if (!setlocale(LC_ALL,"")) return 0;
|
|
if (!XSupportsLocale()) return 0;
|
|
if (!XSetLocaleModifiers("@im=none")) return 0;
|
|
if (!nk_x11_device_create()) return 0;
|
|
|
|
x11.dpy = dpy;
|
|
x11.win = win;
|
|
|
|
/* create invisible cursor */
|
|
{static XColor dummy; char data[1] = {0};
|
|
Pixmap blank = XCreateBitmapFromData(dpy, win, data, 1, 1);
|
|
if (blank == None) return 0;
|
|
x11.cursor = XCreatePixmapCursor(dpy, blank, blank, &dummy, &dummy, 0, 0);
|
|
XFreePixmap(dpy, blank);}
|
|
|
|
nk_init_default(&x11.ctx, 0);
|
|
return &x11.ctx;
|
|
}
|
|
|
|
NK_API void
|
|
nk_x11_shutdown(void)
|
|
{
|
|
nk_font_atlas_clear(&x11.atlas);
|
|
nk_free(&x11.ctx);
|
|
nk_x11_device_destroy();
|
|
XFreeCursor(x11.dpy, x11.cursor);
|
|
memset(&x11, 0, sizeof(x11));
|
|
}
|
|
|
|
#endif
|