Attachment 141498 Details for Bug 107879 – verpixshader.c

verpixshader.c

verpixshader.c (text/x-csrc), 3.61 KB, created by xinghua on 2018-09-10 04:30:42 UTC

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Creator: xinghua

Created: 2018-09-10 04:30:42 UTC

Size: 3.61 KB

patch

obsolete

>// -- Written in C -- //
>#include<stdio.h>
>#include<stdlib.h>
>#include<epoxy/gl.h>
>#include<epoxy/glx.h>
>#include<X11/X.h>
>#include<X11/Xlib.h>
>/*#include<GL/gl.h>
>#include<GL/glx.h>*/
>
>Display                 *dpy;
>Window                  root;
>GLint                   att[] = { GLX_RGBA, GLX_DEPTH_SIZE, 24, GLX_DOUBLEBUFFER, None };
>XVisualInfo             *vi;
>Colormap                cmap;
>XSetWindowAttributes    swa;
>Window                  win, win1;
>GLXContext              glc;
>XWindowAttributes       gwa;
>XEvent                  xev;
>                   
>int main(int argc, char *argv[]) {
>  dpy = XOpenDisplay(NULL);
>  if(dpy == NULL) {
>     printf("\n\tcannot connect to X server\n\n");
>     exit(0);
>  }
>                                                
>  root = DefaultRootWindow(dpy);
>  vi = glXChooseVisual(dpy, 0, att);
>  if(vi == NULL) {
>     printf("\n\tno appropriate visual found\n\n");
>     exit(0);
>  } 
>  else {
>     printf("\n\tvisual %p selected\n", (void *)vi->visualid); /* %p creates hexadecimal output like in glxinfo */
>  }
>
>  cmap = XCreateColormap(dpy, root, vi->visual, AllocNone);
>  swa.colormap = cmap;
>  swa.event_mask = ExposureMask | KeyPressMask;
>  win = XCreateWindow(dpy, root, 0, 0, 128, 128, 0, vi->depth, InputOutput, vi->visual, CWColormap | CWEventMask, &swa);
>  XMapWindow(dpy, win);
>  XStoreName(dpy, win, "VERY SIMPLE APPLICATION");
>  glc = glXCreateContext(dpy, vi, NULL, GL_TRUE);
>  glXMakeCurrent(dpy, win, glc);
>
>  const char *vs =
>            "#version 300 es\n"
>            "in vec4 vPosition;\n"
>            "void main()\n"
>            "{\n"
>            "gl_Position = vPosition;\n"
>            "}\n";
>
>
>  const char *fs =
>            "#version 300 es\n"
>            "precision mediump float;\n"
>            "uniform bool u;\n"
>            "out vec4 result;\n"
>            "int sideEffectCounter;\n"
>            "bool foo() {\n"
>            "    ++sideEffectCounter;\n"
>            "    return true;\n"
>            "}\n"
>            "void main() {\n"
>            "    sideEffectCounter = 0;\n"
>            "    int iterations = 0;\n"
>            "    while(u && foo()) {\n"
>            "        ++iterations;\n"
>            "        if (iterations >= 10) {\n"
>            "            break;\n"
>            "        }\n"
>            "    }\n"
>            "    bool success = (u && sideEffectCounter == 10) || (!u && sideEffectCounter == 0);\n"
>            "    result = success ? vec4(0, 1.0, 0, 1.0) : vec4(0, 1.0, 0, 0);\n"
>            "}\n";
>
>  GLuint mProgram = glCreateProgram();
>  GLuint vsShader = glCreateShader(GL_VERTEX_SHADER);
>  GLuint fsShader = glCreateShader(GL_FRAGMENT_SHADER);
>
>  glShaderSource(vsShader, 1, &vs, NULL);
>  glCompileShader(vsShader);
>  GLint vsCompileStatus;
>  glGetShaderiv(vsShader, GL_COMPILE_STATUS, &vsCompileStatus);
>  if (vsCompileStatus == 0)
>  {
>      printf("VS Compile failed.\n");
>      exit(0);
>  }
>  else
>  {
>      printf("VS Compile success.\n");
>  }
>  glShaderSource(fsShader, 1, &fs, NULL);
>  glCompileShader(fsShader);
>  GLint fsCompileStatus;
>  glGetShaderiv(fsShader, GL_COMPILE_STATUS, &fsCompileStatus);
>  if (fsCompileStatus == 0)
>  {
>      printf("FS Compile failed.\n");
>      exit(0);
>  }
>  else
>  {
>      printf("FS Compile success.\n");
>  }
>
>  glAttachShader(mProgram, vsShader);
>  glAttachShader(mProgram, fsShader);
>  glLinkProgram(mProgram);
>  GLint linkStatus;
>  glGetProgramiv(mProgram, GL_LINK_STATUS, &linkStatus);
>  if (linkStatus == 0)
>  {
>     printf("Link failed.\n");
>     exit(0);
>  }
>  else
>  {
>     printf("Link success.\n");
>  }
>
>  glXMakeCurrent(dpy, None, NULL);
>  glXDestroyContext(dpy, glc);
>  XDestroyWindow(dpy, win);
>  XCloseDisplay(dpy);
>  exit(0);
>}

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Attachments on bug 107879: 141498 | 141651 | 141653

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