Mesa (master): progs/egl: Add an OpenGL ES demo for EGL_OES_image_pixmap.
Chia-I Wu
olv at kemper.freedesktop.org
Sun Apr 4 14:07:42 UTC 2010
Module: Mesa
Branch: master
Commit: ad3575e2dd81252e9ea341d1a7355e0bfd1cccee
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=ad3575e2dd81252e9ea341d1a7355e0bfd1cccee
Author: Chia-I Wu <olv at lunarg.com>
Date: Mon Mar 1 15:21:46 2010 +0800
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.
---
progs/egl/opengles1/Makefile | 4 +
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 c575a97..dac911e 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 0000000..abb8c28
--- /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 at 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;
+}
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