147 lines
3.6 KiB
C
147 lines
3.6 KiB
C
#define GL_GLEXT_PROTOTYPES why
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#include<stdio.h>
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#include<stdbool.h>
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#include<stdlib.h>
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#include<stdint.h>
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#include <glib.h>
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#include <gtk/gtk.h>
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#include <gdk/gdkkeysyms.h>
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#include <GL/gl.h>
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#include <GL/glx.h>
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#include <GL/glu.h>
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#include <GL/glext.h>
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#include "shader.h"
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static char* vshader = "#version 450\nvec2 y=vec2(1.,-1);vec4 x[4]={y.yyxx,y.xyxx,y.yxxx,y.xxxx};void main(){gl_Position=x[gl_VertexID];}";
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#define CANVAS_WIDTH 1920
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#define CANVAS_HEIGHT 1080
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// #define DEBUG
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GLuint vao;
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GLuint p;
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static gboolean
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on_render (GtkGLArea *glarea, GdkGLContext *context)
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{
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glUseProgram(p);
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glBindVertexArray(vao);
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glVertexAttrib1f(0, 0);
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glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
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return TRUE;
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}
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static void on_realize(GtkGLArea *glarea)
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{
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gtk_gl_area_make_current(glarea);
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// compile shader
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GLuint f = glCreateShader(GL_FRAGMENT_SHADER);
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glShaderSource(f, 1, &shader_frag, NULL);
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glCompileShader(f);
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#ifdef DEBUG
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GLint isCompiled = 0;
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glGetShaderiv(f, GL_COMPILE_STATUS, &isCompiled);
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if(isCompiled == GL_FALSE) {
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GLint maxLength = 0;
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glGetShaderiv(f, GL_INFO_LOG_LENGTH, &maxLength);
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char* error = malloc(maxLength);
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glGetShaderInfoLog(f, maxLength, &maxLength, error);
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printf("%s\n", error);
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exit(-10);
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}
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#endif
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GLuint v = glCreateShader(GL_VERTEX_SHADER);
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glShaderSource(v, 1, &vshader, NULL);
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glCompileShader(v);
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#ifdef DEBUG
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GLint isCompiled2 = 0;
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glGetShaderiv(v, GL_COMPILE_STATUS, &isCompiled2);
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if(isCompiled2 == GL_FALSE) {
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GLint maxLength = 0;
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glGetShaderiv(v, GL_INFO_LOG_LENGTH, &maxLength);
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char* error = malloc(maxLength);
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glGetShaderInfoLog(v, maxLength, &maxLength, error);
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printf("%s\n", error);
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exit(-10);
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}
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#endif
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// link shader
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p = glCreateProgram();
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glAttachShader(p,v);
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glAttachShader(p,f);
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glLinkProgram(p);
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#ifdef DEBUG
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GLint isLinked = 0;
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glGetProgramiv(p, GL_LINK_STATUS, (int *)&isLinked);
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if (isLinked == GL_FALSE) {
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GLint maxLength = 0;
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glGetProgramiv(p, GL_INFO_LOG_LENGTH, &maxLength);
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char* error = malloc(maxLength);
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glGetProgramInfoLog(p, maxLength, &maxLength,error);
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printf("%s\n", error);
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exit(-10);
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}
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#endif
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glGenVertexArrays(1, &vao);
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// if you want to continuously render the shader once per frame
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// GdkGLContext *context = gtk_gl_area_get_context(glarea);
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// GdkWindow *glwindow = gdk_gl_context_get_window(context);
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// GdkFrameClock *frame_clock = gdk_window_get_frame_clock(glwindow);
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// // Connect update signal:
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// g_signal_connect_swapped(frame_clock, "update", G_CALLBACK(gtk_gl_area_queue_render), glarea);
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// // Start updating:
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// gdk_frame_clock_begin_updating(frame_clock);
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}
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void _start() {
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asm volatile("sub $8, %rsp\n");
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typedef void (*voidWithOneParam)(int*);
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voidWithOneParam gtk_init_one_param = (voidWithOneParam)gtk_init;
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(*gtk_init_one_param)(NULL);
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GtkWidget *win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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GtkWidget *glarea = gtk_gl_area_new();
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gtk_container_add(GTK_CONTAINER(win), glarea);
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g_signal_connect(win, "destroy", gtk_main_quit, NULL);
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g_signal_connect(glarea, "realize", G_CALLBACK(on_realize), NULL);
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g_signal_connect(glarea, "render", G_CALLBACK(on_render), NULL);
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gtk_widget_show_all (win);
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gtk_window_fullscreen((GtkWindow*)win);
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GdkWindow* window = gtk_widget_get_window(win);
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GdkCursor* Cursor = gdk_cursor_new(GDK_BLANK_CURSOR);
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gdk_window_set_cursor(window, Cursor);
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gtk_main();
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asm volatile(".intel_syntax noprefix");
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asm volatile("push 231"); //exit_group
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asm volatile("pop rax");
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// asm volatile("xor edi, edi");
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asm volatile("syscall");
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asm volatile(".att_syntax prefix");
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__builtin_unreachable();
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// return 0;
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} |