diff options
author | Chia-I Wu <olv@lunarg.com> | 2010-03-01 15:21:46 +0800 |
---|---|---|
committer | Chia-I Wu <olv@lunarg.com> | 2010-04-04 22:07:20 +0800 |
commit | ad3575e2dd81252e9ea341d1a7355e0bfd1cccee (patch) | |
tree | 268d07f9816663bfff0f65b5066718e27edab11c /progs/egl | |
parent | a1aa53b2a934ca026bb115aca18a46fd920f9e8d (diff) |
progs/egl: Add an OpenGL ES demo for EGL_OES_image_pixmap.
The demo uses a Pixmap as its drawing area, and whatever is drawn on the
pixmap will be used as a texture to draw a cube.
Diffstat (limited to 'progs/egl')
-rw-r--r-- | progs/egl/opengles1/Makefile | 4 | ||||
-rw-r--r-- | progs/egl/opengles1/texture_from_pixmap.c | 579 |
2 files changed, 583 insertions, 0 deletions
diff --git a/progs/egl/opengles1/Makefile b/progs/egl/opengles1/Makefile index c575a9703ed..dac911e39f0 100644 --- a/progs/egl/opengles1/Makefile +++ b/progs/egl/opengles1/Makefile @@ -35,6 +35,7 @@ PROGRAMS = \ msaa \ pbuffer \ render_tex \ + texture_from_pixmap \ torus \ two_win @@ -72,6 +73,9 @@ render_tex: render_tex.o $(ES1_LIB_DEPS) $(CC) $(CFLAGS) render_tex.o $(ES1_LIBS) -o $@ +texture_from_pixmap: texture_from_pixmap.o $(ES1_LIB_DEPS) + $(CC) $(CFLAGS) texture_from_pixmap.o $(ES1_LIBS) -o $@ + torus: torus.o $(ES1_LIB_DEPS) $(CC) $(CFLAGS) torus.o $(ES1_LIBS) -o $@ diff --git a/progs/egl/opengles1/texture_from_pixmap.c b/progs/egl/opengles1/texture_from_pixmap.c new file mode 100644 index 00000000000..abb8c28e56e --- /dev/null +++ b/progs/egl/opengles1/texture_from_pixmap.c @@ -0,0 +1,579 @@ +/* + * Mesa 3-D graphics library + * Version: 7.9 + * + * Copyright (C) 2010 LunarG Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN + * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: + * Chia-I Wu <olv@lunarg.com> + */ + +/* + * This demo uses EGL_KHR_image_pixmap and GL_OES_EGL_image to demonstrate + * texture-from-pixmap. + */ + +#include <assert.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> /* for usleep */ +#include <sys/time.h> /* for gettimeofday */ +#include <X11/Xlib.h> +#include <X11/Xutil.h> +#include <X11/keysym.h> +#include <GLES/gl.h> +#include <GLES/glext.h> +#include <EGL/egl.h> +#include <EGL/eglext.h> + +struct app_data { + /* native */ + Display *xdpy; + Window canvas, cube; + Pixmap pix; + unsigned int width, height, depth; + GC fg, bg; + + /* EGL */ + EGLDisplay dpy; + EGLContext ctx; + EGLSurface surf; + EGLImageKHR img; + + /* OpenGL ES */ + GLuint texture; + + PFNEGLCREATEIMAGEKHRPROC eglCreateImageKHR; + PFNEGLDESTROYIMAGEKHRPROC eglDestroyImageKHR; + PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES; + + /* app state */ + Bool loop; + Bool redraw, reshape; + + struct { + Bool active; + unsigned long next_frame; /* in ms */ + float view_rotx; + float view_roty; + float view_rotz; + + } animate; + + struct { + Bool active; + int x1, y1; + int x2, y2; + } paint; +}; + +static void +gl_redraw(void) +{ + const GLfloat verts[4][2] = { + { -1, -1 }, + { 1, -1 }, + { 1, 1 }, + { -1, 1 } + }; + const GLfloat texcoords[4][2] = { + { 0, 1 }, + { 1, 1 }, + { 1, 0 }, + { 0, 0 } + }; + const GLfloat faces[6][4] = { + { 0, 0, 1, 0 }, + { 90, 0, 1, 0 }, + { 180, 0, 1, 0 }, + { 270, 0, 1, 0 }, + { 90, 1, 0, 0 }, + { -90, 1, 0, 0 } + }; + GLint i; + + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + glVertexPointer(2, GL_FLOAT, 0, verts); + glTexCoordPointer(2, GL_FLOAT, 0, texcoords); + + glEnableClientState(GL_VERTEX_ARRAY); + glEnableClientState(GL_TEXTURE_COORD_ARRAY); + + for (i = 0; i < 6; i++) { + glPushMatrix(); + glRotatef(faces[i][0], faces[i][1], faces[i][2], faces[i][3]); + glTranslatef(0, 0, 1.0); + glDrawArrays(GL_TRIANGLE_FAN, 0, 4); + glPopMatrix(); + } + + glDisableClientState(GL_VERTEX_ARRAY); + glDisableClientState(GL_TEXTURE_COORD_ARRAY); +} + +static void +gl_reshape(int width, int height) +{ + GLfloat ar = (GLfloat) width / (GLfloat) height; + + glViewport(0, 0, width, height); + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glFrustumf(-ar, ar, -1, 1, 5.0, 60.0); + + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glTranslatef(0.0, 0.0, -10.0); +} + +static void +app_redraw(struct app_data *data) +{ + /* pixmap has changed */ + if (data->reshape || data->paint.active) { + eglWaitNative(EGL_CORE_NATIVE_ENGINE); + + if (data->reshape) { + data->glEGLImageTargetTexture2DOES(GL_TEXTURE_2D, + (GLeglImageOES) data->img); + } + } + + XCopyArea(data->xdpy, data->pix, data->canvas, data->fg, + 0, 0, data->width, data->height, 0, 0); + + glPushMatrix(); + glRotatef(data->animate.view_rotx, 1, 0, 0); + glRotatef(data->animate.view_roty, 0, 1, 0); + glRotatef(data->animate.view_rotz, 0, 0, 1); + gl_redraw(); + glPopMatrix(); + + eglSwapBuffers(data->dpy, data->surf); +} + +static void +app_reshape(struct app_data *data) +{ + const EGLint img_attribs[] = { + EGL_IMAGE_PRESERVED_KHR, EGL_TRUE, + EGL_NONE + }; + + XResizeWindow(data->xdpy, data->cube, data->width, data->height); + XMoveWindow(data->xdpy, data->cube, data->width, 0); + + if (data->img) + data->eglDestroyImageKHR(data->dpy, data->img); + if (data->pix) + XFreePixmap(data->xdpy, data->pix); + + data->pix = XCreatePixmap(data->xdpy, data->canvas, data->width, data->height, data->depth); + XFillRectangle(data->xdpy, data->pix, data->bg, 0, 0, data->width, data->height); + + data->img = data->eglCreateImageKHR(data->dpy, EGL_NO_CONTEXT, + EGL_NATIVE_PIXMAP_KHR, (EGLClientBuffer) data->pix, img_attribs); + + gl_reshape(data->width, data->height); +} + +static void +app_toggle_animate(struct app_data *data) +{ + data->animate.active = !data->animate.active; + + if (data->animate.active) { + struct timeval tv; + + gettimeofday(&tv, NULL); + data->animate.next_frame = tv.tv_sec * 1000 + tv.tv_usec / 1000; + } +} + +static void +app_next_event(struct app_data *data) +{ + XEvent event; + + data->reshape = False; + data->redraw = False; + data->paint.active = False; + + if (data->animate.active) { + struct timeval tv; + unsigned long now; + + gettimeofday(&tv, NULL); + now = tv.tv_sec * 1000 + tv.tv_usec / 1000; + + /* wait for next frame */ + if (!XPending(data->xdpy) && now < data->animate.next_frame) { + usleep((data->animate.next_frame - now) * 1000); + gettimeofday(&tv, NULL); + now = tv.tv_sec * 1000 + tv.tv_usec / 1000; + } + + while (now >= data->animate.next_frame) { + data->animate.view_rotx += 1.0; + data->animate.view_roty += 2.0; + data->animate.view_rotz += 1.5; + + /* 30fps */ + data->animate.next_frame += 1000 / 30; + } + + /* check again in case there were events when sleeping */ + if (!XPending(data->xdpy)) { + data->redraw = True; + return; + } + } + + XNextEvent(data->xdpy, &event); + + switch (event.type) { + case ConfigureNotify: + data->width = event.xconfigure.width / 2; + data->height = event.xconfigure.height; + data->reshape = True; + break; + case Expose: + data->redraw = True; + break; + case KeyPress: + { + int code; + + code = XLookupKeysym(&event.xkey, 0); + switch (code) { + case XK_a: + app_toggle_animate(data); + break; + case XK_Escape: + data->loop = False; + break; + default: + break; + } + } + break; + case ButtonPress: + data->paint.x1 = data->paint.x2 = event.xbutton.x; + data->paint.y1 = data->paint.y2 = event.xbutton.y; + break; + case ButtonRelease: + data->paint.active = False; + break; + case MotionNotify: + data->paint.x1 = data->paint.x2; + data->paint.y1 = data->paint.y2; + data->paint.x2 = event.xmotion.x; + data->paint.y2 = event.xmotion.y; + data->paint.active = True; + break; + default: + break; + } + + if (data->paint.active || data->reshape) + data->redraw = True; +} + +static void +app_init_gl(struct app_data *data) +{ + glClearColor(0.1, 0.1, 0.3, 0.0); + glColor4f(1.0, 1.0, 1.0, 1.0); + + glGenTextures(1, &data->texture); + + glBindTexture(GL_TEXTURE_2D, data->texture); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + + glEnable(GL_TEXTURE_2D); + glEnable(GL_DEPTH_TEST); +} + +static Bool +app_init_exts(struct app_data *data) +{ + const char *exts; + + exts = eglQueryString(data->dpy, EGL_EXTENSIONS); + data->eglCreateImageKHR = + (PFNEGLCREATEIMAGEKHRPROC) eglGetProcAddress("eglCreateImageKHR"); + data->eglDestroyImageKHR = + (PFNEGLDESTROYIMAGEKHRPROC) eglGetProcAddress("eglDestroyImageKHR"); + if (!exts || !strstr(exts, "EGL_KHR_image_pixmap") || + !data->eglCreateImageKHR || !data->eglDestroyImageKHR) { + printf("EGL does not support EGL_KHR_image_pixmap\n"); + return False; + } + + exts = (const char *) glGetString(GL_EXTENSIONS); + exts = "GL_OES_EGL_image"; /* XXX */ + data->glEGLImageTargetTexture2DOES = (PFNGLEGLIMAGETARGETTEXTURE2DOESPROC) + eglGetProcAddress("glEGLImageTargetTexture2DOES"); + if (!exts || !strstr(exts, "GL_OES_EGL_image") || + !data->glEGLImageTargetTexture2DOES) { + printf("OpenGL ES does not support GL_OES_EGL_image\n"); + return False; + } + + return True; +} + +static void +app_run(struct app_data *data) +{ + Window root; + int x, y; + unsigned int border; + + if (!eglMakeCurrent(data->dpy, data->surf, data->surf, data->ctx)) + return; + + if (!app_init_exts(data)) + return; + + printf("Draw something on the left with the mouse!\n"); + + app_init_gl(data); + + if (!XGetGeometry(data->xdpy, data->canvas, &root, &x, &y, + &data->width, &data->height, &border, &data->depth)) + return; + data->width /= 2; + + app_reshape(data); + + XMapWindow(data->xdpy, data->canvas); + XMapWindow(data->xdpy, data->cube); + + app_toggle_animate(data); + data->loop = True; + + while (data->loop) { + app_next_event(data); + + if (data->reshape) + app_reshape(data); + if (data->paint.active) { + XDrawLine(data->xdpy, data->pix, data->fg, + data->paint.x1, data->paint.y1, + data->paint.x2, data->paint.y2); + } + + if (data->redraw) + app_redraw(data); + } + + eglMakeCurrent(data->dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT); +} + +static Bool +make_x_window(struct app_data *data, const char *name, + int x, int y, int width, int height) +{ + static const EGLint attribs[] = { + EGL_RED_SIZE, 1, + EGL_GREEN_SIZE, 1, + EGL_BLUE_SIZE, 1, + EGL_DEPTH_SIZE, 1, + EGL_RENDERABLE_TYPE, EGL_OPENGL_ES_BIT, + EGL_NONE + }; + static const EGLint ctx_attribs[] = { + EGL_CONTEXT_CLIENT_VERSION, 1, + EGL_NONE + }; + int scrnum; + XSetWindowAttributes attr; + unsigned long mask; + Window root; + Window win; + XVisualInfo *visInfo, visTemplate; + int num_visuals; + EGLConfig config; + EGLint num_configs; + EGLint vid; + + scrnum = DefaultScreen( data->xdpy ); + root = RootWindow( data->xdpy, scrnum ); + + if (!eglChooseConfig( data->dpy, attribs, &config, 1, &num_configs)) { + printf("Error: couldn't get an EGL visual config\n"); + exit(1); + } + + assert(config); + assert(num_configs > 0); + + if (!eglGetConfigAttrib(data->dpy, config, EGL_NATIVE_VISUAL_ID, &vid)) { + printf("Error: eglGetConfigAttrib() failed\n"); + exit(1); + } + + /* The X window visual must match the EGL config */ + visTemplate.visualid = vid; + visInfo = XGetVisualInfo(data->xdpy, VisualIDMask, &visTemplate, &num_visuals); + if (!visInfo) { + printf("Error: couldn't get X visual\n"); + exit(1); + } + + /* window attributes */ + attr.background_pixel = 0; + attr.border_pixel = 0; + attr.colormap = XCreateColormap( data->xdpy, root, visInfo->visual, AllocNone); + attr.event_mask = StructureNotifyMask | ExposureMask | + KeyPressMask | ButtonPressMask | ButtonMotionMask; + mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask; + + win = XCreateWindow( data->xdpy, root, 0, 0, width * 2, height, + 0, visInfo->depth, InputOutput, + visInfo->visual, mask, &attr ); + + /* set hints and properties */ + { + XSizeHints sizehints; + sizehints.x = x; + sizehints.y = y; + sizehints.width = width; + sizehints.height = height; + sizehints.flags = USSize | USPosition; + XSetNormalHints(data->xdpy, win, &sizehints); + XSetStandardProperties(data->xdpy, win, name, name, + None, (char **)NULL, 0, &sizehints); + } + + data->canvas = win; + + attr.event_mask = 0x0; + win = XCreateWindow( data->xdpy, win, width, 0, width, height, + 0, visInfo->depth, InputOutput, + visInfo->visual, mask, &attr ); + data->cube = win; + + eglBindAPI(EGL_OPENGL_ES_API); + + data->ctx = eglCreateContext(data->dpy, config, EGL_NO_CONTEXT, ctx_attribs ); + if (!data->ctx) { + printf("Error: eglCreateContext failed\n"); + exit(1); + } + + data->surf = eglCreateWindowSurface(data->dpy, config, data->cube, NULL); + if (!data->surf) { + printf("Error: eglCreateWindowSurface failed\n"); + exit(1); + } + + XFree(visInfo); + + return (data->canvas && data->cube && data->ctx && data->surf); +} + +static void +app_fini(struct app_data *data) +{ + if (data->img) + data->eglDestroyImageKHR(data->dpy, data->img); + if (data->pix) + XFreePixmap(data->xdpy, data->pix); + + if (data->fg) + XFreeGC(data->xdpy, data->fg); + if (data->bg) + XFreeGC(data->xdpy, data->bg); + + if (data->surf) + eglDestroySurface(data->dpy, data->surf); + if (data->ctx) + eglDestroyContext(data->dpy, data->ctx); + + if (data->cube) + XDestroyWindow(data->xdpy, data->cube); + if (data->canvas) + XDestroyWindow(data->xdpy, data->canvas); + + if (data->dpy) + eglTerminate(data->dpy); + if (data->xdpy) + XCloseDisplay(data->xdpy); +} + +static Bool +app_init(struct app_data *data, int argc, char **argv) +{ + XGCValues gc_vals; + + memset(data, 0, sizeof(*data)); + + data->xdpy = XOpenDisplay(NULL); + if (!data->xdpy) + goto fail; + + data->dpy = eglGetDisplay(data->xdpy); + if (!data->dpy || !eglInitialize(data->dpy, NULL, NULL)) + goto fail; + + if (!make_x_window(data, "EGLImage TFP", 0, 0, 300, 300)) + goto fail; + + gc_vals.function = GXcopy; + gc_vals.foreground = WhitePixel(data->xdpy, DefaultScreen(data->xdpy)); + gc_vals.line_width = 3; + gc_vals.line_style = LineSolid; + gc_vals.fill_style = FillSolid; + + data->fg = XCreateGC(data->xdpy, data->canvas, + GCFunction | GCForeground | GCLineWidth | GCLineStyle | GCFillStyle, + &gc_vals); + gc_vals.foreground = BlackPixel(data->xdpy, DefaultScreen(data->xdpy)); + data->bg = XCreateGC(data->xdpy, data->canvas, + GCFunction | GCForeground | GCLineWidth | GCLineStyle | GCFillStyle, + &gc_vals); + if (!data->fg || !data->bg) + goto fail; + + return True; + +fail: + app_fini(data); + return False; +} + +int +main(int argc, char **argv) +{ + struct app_data data; + + if (app_init(&data, argc, argv)) { + app_run(&data); + app_fini(&data); + } + + return 0; +} |