opengl device (just for fun)

diff --git a/lib/devices/opengl.c b/lib/devices/opengl.c
new file mode 100644 (file)
index 0000000..bf9c1d1
--- /dev/null
+++ b/lib/devices/opengl.c
@@ -0,0 +1,177 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../gfxdevice.h"
+#include "../gfxtools.h"
+
+#include <time.h>
+#include <GL/gl.h>
+#include <GL/glut.h>
+
+#include <setjmp.h>
+
+typedef struct _fontlist {
+    gfxfont_t*font;
+    char*id;
+    struct _fontlist*next;
+} fontlist_t;
+
+typedef struct _internal {
+    gfxfont_t*font;
+    char*fontid;
+    fontlist_t* fontlist;
+} internal_t;
+
+int opengl_setparameter(struct _gfxdevice*dev, const char*key, const char*value)
+{
+    return 0;
+}
+
+jmp_buf env;
+//jmp_buf env2;
+
+void display()
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    /*if(!setjmp(env2))
+       longjmp(env, 1);*/
+    longjmp(env, 1);
+}
+
+void opengl_startpage(struct _gfxdevice*dev, int width, int height)
+{
+    glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
+    glutInitWindowSize(width,height);
+    glutInitWindowPosition(100,100);
+    glutCreateWindow("gfxdevice_opengl");
+    glutDisplayFunc(display);
+
+    glClearColor(1.0,0.0,0.0,0.0);
+    glShadeModel(GL_FLAT);
+    glEnable(GL_DEPTH_TEST);
+    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+    
+    glViewport(0,0, width, height);
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    //gluPerspective(/*angle*/60.0, (GLfloat)width/(GLfloat)height, /*nearclip*/1.0, /*farclip*/30.0);
+
+    glMatrixMode(GL_MODELVIEW);
+    glLoadIdentity();
+    glScalef(1.0/width,1.0/height,1.0);
+    
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+   
+    int ret=0;
+    ret = setjmp(env);
+    if(!ret) {
+       glutMainLoop();
+    }
+}
+
+void opengl_startclip(struct _gfxdevice*dev, gfxline_t*line)
+{
+    int t;
+    for(t=1;t<100;t++) {
+       glColor3f(1.0,1.0,1.0);
+       glBegin(GL_POLYGON);
+           glVertex3f(-t*10,-t*10,0);
+           glVertex3f(-t*10,t*10,0);
+           glVertex3f(t*10,t*10,0);
+           glVertex3f(t*10,-t*10,0);
+       glEnd();
+    }
+    //glRectf(-50,-50,0.0,0.0);
+}
+
+void opengl_endclip(struct _gfxdevice*dev)
+{
+}
+
+void opengl_stroke(struct _gfxdevice*dev, gfxline_t*line, gfxcoord_t width, gfxcolor_t*color, gfx_capType cap_style, gfx_joinType joint_style, gfxcoord_t miterLimit)
+{
+}
+
+void opengl_fill(struct _gfxdevice*dev, gfxline_t*line, gfxcolor_t*color)
+{
+}
+
+void opengl_fillbitmap(struct _gfxdevice*dev, gfxline_t*line, gfximage_t*img, gfxmatrix_t*matrix, gfxcxform_t*cxform)
+{
+}
+
+void opengl_fillgradient(struct _gfxdevice*dev, gfxline_t*line, gfxgradient_t*gradient, gfxgradienttype_t type, gfxmatrix_t*matrix)
+{
+}
+
+void opengl_addfont(struct _gfxdevice*dev, char*fontid, gfxfont_t*font)
+{
+}
+
+void opengl_drawchar(struct _gfxdevice*dev, char*fontid, int glyph, gfxcolor_t*color, gfxmatrix_t*matrix)
+{
+}
+
+void opengl_drawlink(struct _gfxdevice*dev, gfxline_t*line, char*action)
+{
+}
+
+void opengl_endpage(struct _gfxdevice*dev)
+{
+    glFlush();
+    //longjmp(env2, 1);
+    glutMainLoop();
+}
+
+
+int opengl_result_save(struct _gfxresult*gfx, char*filename)
+{
+    return 0;
+}
+void* opengl_result_get(struct _gfxresult*gfx, char*name)
+{
+    return 0;
+}
+void opengl_result_destroy(struct _gfxresult*gfx)
+{
+    free(gfx);
+}
+
+gfxresult_t*opengl_finish(struct _gfxdevice*dev)
+{
+    internal_t*i = (internal_t*)dev->internal;
+    gfxresult_t*result = (gfxresult_t*)malloc(sizeof(gfxresult_t));
+    memset(result, 0, sizeof(gfxresult_t));
+    result->save = opengl_result_save;
+    result->get = opengl_result_get;
+    result->destroy = opengl_result_destroy;
+    return result;
+}
+
+void gfxdevice_opengl_init(gfxdevice_t*dev)
+{
+    internal_t*i = (internal_t*)rfx_calloc(sizeof(internal_t));
+    int argc=1;
+    char*argv[]={"gfxdevice_opengl", 0};
+    glutInit(&argc, argv);
+    
+    memset(dev, 0, sizeof(gfxdevice_t));
+
+    dev->internal = i;
+    
+    dev->setparameter = opengl_setparameter;
+    dev->startpage = opengl_startpage;
+    dev->startclip = opengl_startclip;
+    dev->endclip = opengl_endclip;
+    dev->stroke = opengl_stroke;
+    dev->fill = opengl_fill;
+    dev->fillbitmap = opengl_fillbitmap;
+    dev->fillgradient = opengl_fillgradient;
+    dev->addfont = opengl_addfont;
+    dev->drawchar = opengl_drawchar;
+    dev->drawlink = opengl_drawlink;
+    dev->endpage = opengl_endpage;
+    dev->finish = opengl_finish;
+}