diff options
Diffstat (limited to 'hacks/glx/flipscreen3d.c')
| -rw-r--r-- | hacks/glx/flipscreen3d.c | 523 |
1 files changed, 0 insertions, 523 deletions
diff --git a/hacks/glx/flipscreen3d.c b/hacks/glx/flipscreen3d.c deleted file mode 100644 index 4de26de..0000000 --- a/hacks/glx/flipscreen3d.c +++ /dev/null @@ -1,523 +0,0 @@ -/* - * flipscreen3d - takes snapshots of the screen and flips it around - * - * version 1.0 - Oct 24, 2001 - * - * Copyright (C) 2001 Ben Buxton (bb@cactii.net) - * - * Permission to use, copy, modify, distribute, and sell this software and its - * documentation for any purpose is hereby granted without fee, provided that - * the above copyright notice appear in all copies and that both that - * copyright notice and this permission notice appear in supporting - * documentation. No representations are made about the suitability of this - * software for any purpose. It is provided "as is" without express or - * implied warranty. - */ - -#ifdef STANDALONE -#define DEFAULTS "*delay: 20000 \n" \ - "*showFPS: False \n" \ - "*wireframe: False \n" \ - "*useSHM: True \n" \ - "*suppressRotationAnimation: True\n" \ - -# define release_screenflip 0 -# include "xlockmore.h" /* from the xscreensaver distribution */ -# include "gltrackball.h" -#else /* !STANDALONE */ -# include "xlock.h" /* from the xlockmore distribution */ -#endif /* !STANDALONE */ - -/* lifted from lament.c */ -#define RAND(n) ((long) ((random() & 0x7fffffff) % ((long) (n)))) -#define RANDSIGN() ((random() & 1) ? 1 : -1) - - -#ifdef USE_GL - -/* Should be in <GL/glext.h> */ -# ifndef GL_TEXTURE_MAX_ANISOTROPY_EXT -# define GL_TEXTURE_MAX_ANISOTROPY_EXT 0x84FE -# endif -# ifndef GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT -# define GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT 0x84FF -# endif - -#define DEF_ROTATE "True" -static int rotate; - -#define QW 12 -#define QH 12 - -static XrmOptionDescRec opts[] = { - {"+rotate", ".screenflip.rotate", XrmoptionNoArg, "false" }, - {"-rotate", ".screenflip.rotate", XrmoptionNoArg, "true" }, -}; - - -static argtype vars[] = { - {&rotate, "rotate", "Rotate", DEF_ROTATE, t_Bool}, -}; - - - -ENTRYPOINT ModeSpecOpt screenflip_opts = {countof(opts), opts, countof(vars), vars, NULL}; - - -#ifdef USE_MODULES -ModStruct screenflip_description = -{"screenflip", "init_screenflip", "draw_screenflip", NULL, - "draw_screenflip", "init_screenflip", NULL, &screenflip_opts, - 1000, 1, 2, 1, 4, 1.0, "", - "Screenflips", 0, NULL}; - -#endif - - -typedef struct { - GLXContext *glx_context; - Window window; - - int winw, winh; - int tw, th; /* texture width, height */ - GLfloat min_tx, min_ty; - GLfloat max_tx, max_ty; - GLfloat qx, qy, qw, qh; /* the quad we'll draw */ - - int regrab; - int fadetime; /* fade before regrab */ - - trackball_state *trackball; - Bool button_down_p; - - GLfloat show_colors[4]; - GLfloat stretch_val_x, stretch_val_y; - GLfloat stretch_val_dx, stretch_val_dy; - - GLfloat curx, cury, curz; - - GLfloat rx, ry, rz; - GLfloat rot, drot, odrot, ddrot, orot; - float theta, rho, dtheta, drho, gamma, dgamma; - - GLuint texid; - Bool mipmap_p; - Bool waiting_for_image_p; - Bool first_image_p; - - GLfloat anisotropic; - -} Screenflip; - -static Screenflip *screenflip = NULL; - -#include "grab-ximage.h" - -static const GLfloat viewer[] = {0.0, 0.0, 15.0}; - - -static void getSnapshot (ModeInfo *); - - -ENTRYPOINT Bool -screenflip_handle_event (ModeInfo *mi, XEvent *event) -{ - Screenflip *c = &screenflip[MI_SCREEN(mi)]; - - if (gltrackball_event_handler (event, c->trackball, - MI_WIDTH (mi), MI_HEIGHT (mi), - &c->button_down_p)) - return True; - else if (screenhack_event_helper (MI_DISPLAY(mi), MI_WINDOW(mi), event)) - { - if (!c->waiting_for_image_p) - { - getSnapshot (mi); - return True; - } - } - - return False; -} - - -/* draw the texture mapped quad (actually two back to back)*/ -static void showscreen(Screenflip *c, int frozen, int wire) -{ - GLfloat x, y, w, h; - - if (c->fadetime) { -/* r -= 0.02; g -= 0.02; b -= 0.02; */ - c->show_colors[3] -= 0.02; - if (c->show_colors[3] < 0) { - c->regrab = 1; - c->fadetime = 0; - } - } else if (c->show_colors[3] < 0) { - c->show_colors[0] = c->show_colors[1] = - c->show_colors[2] = c->show_colors[3] = 1; - c->stretch_val_x = c->stretch_val_y = - c->stretch_val_dx = c->stretch_val_dy = 0; - } - if (c->stretch_val_dx == 0 && !frozen && !(random() % 25)) - c->stretch_val_dx = (float)(random() % 100) / 5000; - if (c->stretch_val_dy == 0 && !frozen && !(random() % 25)) - c->stretch_val_dy = (float)(random() % 100) / 5000; - - x = c->qx; - y = c->qy; - w = c->qx+c->qw; - h = c->qy-c->qh; - - if (!frozen) { - w *= sin (c->stretch_val_x) + 1; - x *= sin (c->stretch_val_x) + 1; - if (!c->button_down_p) { - if (!c->fadetime) c->stretch_val_x += c->stretch_val_dx; - if (c->stretch_val_x > 2*M_PI && !(random() % 5)) - c->stretch_val_dx = (float)(random() % 100) / 5000; - else - c->stretch_val_x -= 2*M_PI; - } - - if (!c->button_down_p && !c->fadetime) c->stretch_val_y += c->stretch_val_dy; - h *= sin (c->stretch_val_y) / 2 + 1; - y *= sin (c->stretch_val_y) / 2 + 1; - if (!c->button_down_p) { - if (c->stretch_val_y > 2*M_PI && !(random() % 5)) - c->stretch_val_dy = (float)(random() % 100) / 5000; - else - c->stretch_val_y -= 2*M_PI; - } - } - - glColor4f(c->show_colors[0], c->show_colors[1], - c->show_colors[2], c->show_colors[3]); - - if (!wire) - { - glEnable(GL_TEXTURE_2D); - glEnable(GL_BLEND); - glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); - glDepthMask(GL_FALSE); - } - - glBegin(wire ? GL_LINE_LOOP : GL_QUADS); - - glNormal3f(0, 0, 1); - glTexCoord2f(c->max_tx, c->max_ty); glVertex3f(w, h, 0); - glTexCoord2f(c->max_tx, c->min_ty); glVertex3f(w, y, 0); - glTexCoord2f(c->min_tx, c->min_ty); glVertex3f(x, y, 0); - glTexCoord2f(c->min_tx, c->max_ty); glVertex3f(x, h, 0); - - glNormal3f(0, 0, -1); - glTexCoord2f(c->min_tx, c->min_ty); glVertex3f(x, y, -0.05); - glTexCoord2f(c->max_tx, c->min_ty); glVertex3f(w, y, -0.05); - glTexCoord2f(c->max_tx, c->max_ty); glVertex3f(w, h, -0.05); - glTexCoord2f(c->min_tx, c->max_ty); glVertex3f(x, h, -0.05); - glEnd(); - - - glDisable(GL_TEXTURE_2D); - glDepthMask(GL_TRUE); - - glBegin(GL_LINE_LOOP); - glVertex3f(x, y, 0); - glVertex3f(x, h, 0); - glVertex3f(w, h, 0); - glVertex3f(w, y, 0); - glEnd(); - glDisable(GL_BLEND); - -} - -/* This function is responsible for 'zooming back' the square after - * a new chunk has been grabbed with getSnapshot(), and positioning - * it suitably on the screen. Once positioned (where we begin to rotate), - * it just does a glTranslatef() and returns 1 - */ - -static int inposition(Screenflip *c) -{ - GLfloat wx; - GLfloat wy; - wx = 0 - (c->qw/2); - wy = (c->qh/2); - - if (c->curx == 0) c->curx = c->qx; - if (c->cury == 0) c->cury = c->qy; - if (c->regrab) { - c->curz = 0; - c->curx = c->qx; - c->cury = c->qy; - c->regrab = 0; - } - if (c->curz > -10 || c->curx > wx + 0.1 || c->curx < wx - 0.1 || - c->cury > wy + 0.1 || c->cury < wy - 0.1) { - if (c->curz > -10) - c->curz -= 0.05; - if (c->curx > wx) { - c->qx -= 0.02; - c->curx -= 0.02; - } - if (c->curx < wx) { - c->qx += 0.02; - c->curx += 0.02; - } - if (c->cury > wy) { - c->qy -= 0.02; - c->cury -= 0.02; - } - if (c->cury < wy) { - c->qy += 0.02; - c->cury += 0.02; - } - glTranslatef(0, 0, c->curz); - return 0; - } - glTranslatef(0, 0, c->curz); - return 1; - -} - -#if 0 -static void drawgrid(void) -{ - int i; - - glColor3f(0, 0.7, 0); - glBegin(GL_LINES); - for (i = 0 ; i <= 50; i+=2) { - glVertex3f( -25, -15, i-70); - glVertex3f( 25, -15, i-70); - glVertex3f( i-25, -15, -70); - glVertex3f( i-25, -15, -20); - } - glEnd(); -} -#endif - - -static void display(Screenflip *c, int wire) -{ - int frozen; - GLfloat rot = current_device_rotation(); - - glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); - glLoadIdentity(); - gluLookAt(viewer[0], viewer[1], viewer[2], 0.0, 0.0, 0.0, 0.0, 1.0, 0.0); - glPushMatrix(); - -/* - glRotatef(rot, 0, 0, 1); - if ((rot > 45 && rot < 135) || - (rot < -45 && rot > -135)) - { - GLfloat s = c->winw / (GLfloat) c->winh; - glScalef (s, 1/s, 1); - } -*/ - - if (inposition(c)) { - frozen = 0; - glTranslatef(5 * sin(c->theta), 5 * sin(c->rho), 10 * cos(c->gamma) - 10); -/* randomly change the speed */ - if (!c->button_down_p && !(random() % 300)) { - if (random() % 2) - c->drho = 1/60 - (float)(random() % 100)/3000; - if (random() % 2) - c->dtheta = 1/60 - (float)(random() % 100)/3000; - if (random() % 2) - c->dgamma = 1/60 - (float)(random() % 100)/3000; - } - glRotatef(rot, 0, 0, 1); - gltrackball_rotate (c->trackball); - glRotatef(-rot, 0, 0, 1); - if (rotate) glRotatef(c->rot, c->rx, c->ry, c->rz); -/* update variables with each frame */ - if(!c->button_down_p && !c->fadetime) { - c->theta += c->dtheta; - c->rho += c->drho; - c->gamma += c->dgamma; - c->rot += c->drot; - c->drot += c->ddrot; - } -/* dont let our rotation speed get too high */ - if (c->drot > 5 && c->ddrot > 0) - c->ddrot = 0 - (GLfloat)(random() % 100) / 1000; - else if (c->drot < -5 && c->ddrot < 0) - c->ddrot = (GLfloat)(random() % 100) / 1000; - } else { /* reset some paramaters */ - c->ddrot = 0.05 - (GLfloat)(random() % 100) / 1000; - c->theta = c->rho = c->gamma = 0; - c->rot = 0; - frozen = 1; - } - if (!c->button_down_p && !c->fadetime && (c->rot >= 360 || c->rot <= -360) && !(random() % 7)) { /* rotate change */ - c->rx = (GLfloat)(random() % 100) / 100; - c->ry = (GLfloat)(random() % 100) / 100; - c->rz = (GLfloat)(random() % 100) / 100; - } - if (c->odrot * c->drot < 0 && c->tw < c->winw && !(random() % 10)) { - c->fadetime = 1; /* randomly fade and get new snapshot */ - } - c->orot = c->rot; - c->odrot = c->drot; - if (c->rot > 360 || c->rot < -360) /* dont overflow rotation! */ - c->rot -= c->rot; - showscreen(c, frozen, wire); - glPopMatrix(); - glFlush(); -} - -ENTRYPOINT void reshape_screenflip(ModeInfo *mi, int width, int height) -{ - Screenflip *c = &screenflip[MI_SCREEN(mi)]; - glViewport(0,0,(GLint)width, (GLint) height); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - gluPerspective(45, 1, 2.0, 85); - glMatrixMode(GL_MODELVIEW); - c->winw = width; - c->winh = height; -} - -static void -image_loaded_cb (const char *filename, XRectangle *geometry, - int image_width, int image_height, - int texture_width, int texture_height, - void *closure) -{ - Screenflip *c = (Screenflip *) closure; - - c->tw = texture_width; - c->th = texture_height; - c->min_tx = (GLfloat) geometry->x / c->tw; - c->min_ty = (GLfloat) geometry->y / c->th; - c->max_tx = (GLfloat) (geometry->x + geometry->width) / c->tw; - c->max_ty = (GLfloat) (geometry->y + geometry->height) / c->th; - - c->qx = -QW/2 + ((GLfloat) geometry->x * QW / image_width); - c->qy = QH/2 - ((GLfloat) geometry->y * QH / image_height); - c->qw = QW * ((GLfloat) geometry->width / image_width); - c->qh = QH * ((GLfloat) geometry->height / image_height); - - glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, - (c->mipmap_p ? GL_LINEAR_MIPMAP_LINEAR : GL_LINEAR)); - - if (c->anisotropic >= 1.0) - glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, - c->anisotropic); - - c->waiting_for_image_p = False; - c->first_image_p = False; -} - - -static void getSnapshot (ModeInfo *modeinfo) -{ - Screenflip *c = &screenflip[MI_SCREEN(modeinfo)]; - - if (MI_IS_WIREFRAME(modeinfo)) - return; - - c->waiting_for_image_p = True; - c->mipmap_p = True; - load_texture_async (modeinfo->xgwa.screen, modeinfo->window, - *c->glx_context, 0, 0, c->mipmap_p, c->texid, - image_loaded_cb, c); -} - -ENTRYPOINT void init_screenflip(ModeInfo *mi) -{ - int screen = MI_SCREEN(mi); - Screenflip *c; - - MI_INIT(mi, screenflip); - c = &screenflip[screen]; - c->window = MI_WINDOW(mi); - - c->trackball = gltrackball_init (False); - - if ((c->glx_context = init_GL(mi)) != NULL) { - reshape_screenflip(mi, MI_WIDTH(mi), MI_HEIGHT(mi)); - } else { - MI_CLEARWINDOW(mi); - } - c->winh = MI_WIN_HEIGHT(mi); - c->winw = MI_WIN_WIDTH(mi); - c->qw = QW; - c->qh = QH; - c->qx = -6; - c->qy = 6; - - c->rx = c->ry = 1; - c->odrot = 1; - - c->show_colors[0] = c->show_colors[1] = - c->show_colors[2] = c->show_colors[3] = 1; - - if (! MI_IS_WIREFRAME(mi)) - { - glShadeModel(GL_SMOOTH); - glPolygonMode(GL_FRONT_AND_BACK,GL_FILL); - glEnable(GL_DEPTH_TEST); - glEnable(GL_CULL_FACE); - glCullFace(GL_BACK); - glDisable(GL_LIGHTING); - } - - if (strstr ((char *) glGetString(GL_EXTENSIONS), - "GL_EXT_texture_filter_anisotropic")) - glGetFloatv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &c->anisotropic); - else - c->anisotropic = 0.0; - - glGenTextures(1, &c->texid); - - c->first_image_p = True; - getSnapshot(mi); -} - -ENTRYPOINT void draw_screenflip(ModeInfo *mi) -{ - Screenflip *c = &screenflip[MI_SCREEN(mi)]; - Window w = MI_WINDOW(mi); - Display *disp = MI_DISPLAY(mi); - - if (!c->glx_context) - return; - - /* Wait for the first image; for subsequent images, load them in the - background while animating. */ - if (c->waiting_for_image_p && c->first_image_p) - return; - - glXMakeCurrent(disp, w, *c->glx_context); - - glBindTexture(GL_TEXTURE_2D, c->texid); - - if (c->regrab) - getSnapshot(mi); - - display(c, MI_IS_WIREFRAME(mi)); - - if(mi->fps_p) do_fps(mi); - glFinish(); - glXSwapBuffers(disp, w); -} - - -ENTRYPOINT void free_screenflip(ModeInfo *mi) -{ - Screenflip *c = &screenflip[MI_SCREEN(mi)]; - if (!c->glx_context) return; - glXMakeCurrent (MI_DISPLAY(mi), MI_WINDOW(mi), *c->glx_context); - gltrackball_free (c->trackball); - if (c->texid) glDeleteTextures (1, &c->texid); -} - -XSCREENSAVER_MODULE_2 ("FlipScreen3D", flipscreen3d, screenflip) - -#endif |