espelhamento de https://github.com/blackle/Linux-OpenGL-Examples
Opengl with gtk example
Esse commit está contido em:
pai
57135dcee2
commit
574c83edee
|
@ -0,0 +1,4 @@
|
|||
*.elf
|
||||
gtk-webkit
|
||||
gtk-opengl
|
||||
shader.h
|
16
Makefile
16
Makefile
|
@ -1,17 +1,29 @@
|
|||
|
||||
all : gtk-webkit
|
||||
all : gtk-webkit gtk-opengl
|
||||
|
||||
.PHONY: clean
|
||||
|
||||
packer : vondehi/vondehi.asm
|
||||
cd vondehi; nasm -fbin -o vondehi vondehi.asm
|
||||
|
||||
shader.h : shader.frag Makefile
|
||||
mono ./shader_minifier.exe --preserve-externals shader.frag -o shader.h
|
||||
|
||||
# not using `pkg-config --libs` here because it will include too many libs
|
||||
gtk-webkit.elf : gtk-webkit.c Makefile
|
||||
gcc -o $@ $< `pkg-config --cflags webkit2gtk-4.0` -lgobject-2.0 -lgtk-3 -lwebkit2gtk-4.0 -no-pie -fno-plt -Os -std=gnu11 -nostartfiles -nostdlib
|
||||
|
||||
gtk-opengl.elf : gtk-opengl.c shader.h Makefile
|
||||
gcc -o $@ $< `pkg-config --cflags gtk+-3.0` -lglib-2.0 -lGL -lgtk-3 -lgdk-3 -lgobject-2.0 -no-pie -fno-plt -Os -std=gnu11 -nostartfiles -nostdlib
|
||||
|
||||
gtk-webkit : gtk-webkit_opt.elf.packed
|
||||
mv $< $@
|
||||
|
||||
gtk-opengl : gtk-opengl_opt.elf.packed
|
||||
mv $< $@
|
||||
|
||||
|
||||
#all the rest of these rules just takes a compiled elf file and generates a packed version of it with vondehi
|
||||
%_opt.elf : %.elf Makefile
|
||||
cp $< $@
|
||||
strip $@
|
||||
|
@ -38,4 +50,4 @@ gtk-webkit : gtk-webkit_opt.elf.packed
|
|||
wc -c $@
|
||||
|
||||
clean :
|
||||
-rm *.elf gtk-webkit
|
||||
-rm *.elf shader.h gtk-webkit
|
||||
|
|
|
@ -0,0 +1,154 @@
|
|||
#define GL_GLEXT_PROTOTYPES why
|
||||
|
||||
#include<stdio.h>
|
||||
#include<stdbool.h>
|
||||
#include<stdlib.h>
|
||||
#include<stdint.h>
|
||||
|
||||
#include <glib.h>
|
||||
#include <gtk/gtk.h>
|
||||
#include <gdk/gdkkeysyms.h>
|
||||
#include <GL/gl.h>
|
||||
#include <GL/glx.h>
|
||||
#include <GL/glu.h>
|
||||
#include <GL/glext.h>
|
||||
|
||||
#include "shader.h"
|
||||
static char* vshader = "#version 450\nvec2 y=vec2(1.,-1);\nvec4 x[4]={y.yyxx,y.xyxx,y.yxxx,y.xxxx};void main(){gl_Position=x[gl_VertexID];}";
|
||||
|
||||
#define CANVAS_WIDTH 1920
|
||||
#define CANVAS_HEIGHT 1080
|
||||
// #define DEBUG
|
||||
|
||||
GLuint vao;
|
||||
GLuint p;
|
||||
GTimer* gtimer;
|
||||
|
||||
static gboolean
|
||||
on_render (GtkGLArea *glarea, GdkGLContext *context)
|
||||
{
|
||||
float itime = g_timer_elapsed(gtimer, NULL);
|
||||
|
||||
if (itime > 10.0) gtk_main_quit();
|
||||
|
||||
glUseProgram(p);
|
||||
glUniform1f(0, itime);
|
||||
glBindVertexArray(vao);
|
||||
glVertexAttrib1f(0, 0);
|
||||
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
|
||||
|
||||
return TRUE;
|
||||
}
|
||||
|
||||
static void on_realize(GtkGLArea *glarea)
|
||||
{
|
||||
gtk_gl_area_make_current(glarea);
|
||||
|
||||
// compile shader
|
||||
GLuint f = glCreateShader(GL_FRAGMENT_SHADER);
|
||||
glShaderSource(f, 1, &shader_frag, NULL);
|
||||
glCompileShader(f);
|
||||
|
||||
#ifdef DEBUG
|
||||
GLint isCompiled = 0;
|
||||
glGetShaderiv(f, GL_COMPILE_STATUS, &isCompiled);
|
||||
if(isCompiled == GL_FALSE) {
|
||||
GLint maxLength = 0;
|
||||
glGetShaderiv(f, GL_INFO_LOG_LENGTH, &maxLength);
|
||||
|
||||
char* error = malloc(maxLength);
|
||||
glGetShaderInfoLog(f, maxLength, &maxLength, error);
|
||||
printf("%s\n", error);
|
||||
|
||||
exit(-10);
|
||||
}
|
||||
#endif
|
||||
|
||||
GLuint v = glCreateShader(GL_VERTEX_SHADER);
|
||||
glShaderSource(v, 1, &vshader, NULL);
|
||||
glCompileShader(v);
|
||||
|
||||
#ifdef DEBUG
|
||||
GLint isCompiled2 = 0;
|
||||
glGetShaderiv(v, GL_COMPILE_STATUS, &isCompiled2);
|
||||
if(isCompiled2 == GL_FALSE) {
|
||||
GLint maxLength = 0;
|
||||
glGetShaderiv(v, GL_INFO_LOG_LENGTH, &maxLength);
|
||||
|
||||
char* error = malloc(maxLength);
|
||||
glGetShaderInfoLog(v, maxLength, &maxLength, error);
|
||||
printf("%s\n", error);
|
||||
|
||||
exit(-10);
|
||||
}
|
||||
#endif
|
||||
|
||||
// link shader
|
||||
p = glCreateProgram();
|
||||
glAttachShader(p,v);
|
||||
glAttachShader(p,f);
|
||||
glLinkProgram(p);
|
||||
|
||||
#ifdef DEBUG
|
||||
GLint isLinked = 0;
|
||||
glGetProgramiv(p, GL_LINK_STATUS, (int *)&isLinked);
|
||||
if (isLinked == GL_FALSE) {
|
||||
GLint maxLength = 0;
|
||||
glGetProgramiv(p, GL_INFO_LOG_LENGTH, &maxLength);
|
||||
|
||||
char* error = malloc(maxLength);
|
||||
glGetProgramInfoLog(p, maxLength, &maxLength,error);
|
||||
printf("%s\n", error);
|
||||
|
||||
exit(-10);
|
||||
}
|
||||
#endif
|
||||
|
||||
glGenVertexArrays(1, &vao);
|
||||
|
||||
GdkGLContext *context = gtk_gl_area_get_context(glarea);
|
||||
GdkWindow *glwindow = gdk_gl_context_get_window(context);
|
||||
GdkFrameClock *frame_clock = gdk_window_get_frame_clock(glwindow);
|
||||
|
||||
// Connect update signal:
|
||||
g_signal_connect_swapped(frame_clock, "update", G_CALLBACK(gtk_gl_area_queue_render), glarea);
|
||||
|
||||
// Start updating:
|
||||
gdk_frame_clock_begin_updating(frame_clock);
|
||||
}
|
||||
|
||||
void _start() {
|
||||
asm volatile("sub $8, %rsp\n");
|
||||
|
||||
typedef void (*voidWithOneParam)(int*);
|
||||
voidWithOneParam gtk_init_one_param = (voidWithOneParam)gtk_init;
|
||||
(*gtk_init_one_param)(NULL);
|
||||
|
||||
gtimer = g_timer_new();
|
||||
|
||||
GtkWidget *win = gtk_window_new (GTK_WINDOW_TOPLEVEL);
|
||||
GtkWidget *glarea = gtk_gl_area_new();
|
||||
gtk_container_add(GTK_CONTAINER(win), glarea);
|
||||
|
||||
g_signal_connect(win, "destroy", gtk_main_quit, NULL);
|
||||
g_signal_connect(glarea, "realize", G_CALLBACK(on_realize), NULL);
|
||||
g_signal_connect(glarea, "render", G_CALLBACK(on_render), NULL);
|
||||
|
||||
gtk_widget_show_all (win);
|
||||
|
||||
gtk_window_fullscreen((GtkWindow*)win);
|
||||
GdkWindow* window = gtk_widget_get_window(win);
|
||||
GdkCursor* Cursor = gdk_cursor_new(GDK_BLANK_CURSOR);
|
||||
gdk_window_set_cursor(window, Cursor);
|
||||
|
||||
gtk_main();
|
||||
|
||||
asm volatile(".intel_syntax noprefix");
|
||||
asm volatile("push 231"); //exit_group
|
||||
asm volatile("pop rax");
|
||||
// asm volatile("xor edi, edi");
|
||||
asm volatile("syscall");
|
||||
asm volatile(".att_syntax prefix");
|
||||
__builtin_unreachable();
|
||||
// return 0;
|
||||
}
|
|
@ -0,0 +1,14 @@
|
|||
#version 450
|
||||
|
||||
uniform float iTime;
|
||||
out vec4 fragColor;
|
||||
|
||||
void main()
|
||||
{
|
||||
// Normalized pixel coordinates (from -1 to 1)
|
||||
vec2 iResolution = vec2(1920.0, 1080.0);
|
||||
vec2 uv = (gl_FragCoord.xy/iResolution.xy)*2.0 - vec2(1.0,1.0);
|
||||
uv.y *= iResolution.y/iResolution.x;
|
||||
|
||||
fragColor = abs(uv.yxyx + sin(iTime)/2.0);
|
||||
}
|
Arquivo binário não exibido.
Carregando…
Referência em uma nova issue