[Mesa-dev] [PATCH] progs/egl: Add an OpenGL ES 2.0 demo for EGL_OES_image_pixmap.
Shuang He
shuang.he at intel.com
Tue Jul 19 01:24:41 PDT 2011
This is based on opengles1/texture_from_pixmap.c
---
src/egl/opengles2/Makefile.am | 4 +-
src/egl/opengles2/texture_from_pixmap.c | 653 +++++++++++++++++++++++++++++++
2 files changed, 656 insertions(+), 1 deletions(-)
create mode 100644 src/egl/opengles2/texture_from_pixmap.c
diff --git a/src/egl/opengles2/Makefile.am b/src/egl/opengles2/Makefile.am
index 8d85c06..1e791fb 100644
--- a/src/egl/opengles2/Makefile.am
+++ b/src/egl/opengles2/Makefile.am
@@ -38,7 +38,8 @@ if HAVE_GLESV2
bin_PROGRAMS = \
es2_info \
es2gears \
- es2tri
+ es2tri \
+ texture_from_pixmap
endif
endif
@@ -46,3 +47,4 @@ es2_info_LDADD = $(X11_LIBS)
es2tri_LDADD = $(X11_LIBS)
es2gears_LDADD = ../eglut/libeglut_x11.la
+texture_from_pixmap_LDADD = $(X11_LIBS)
diff --git a/src/egl/opengles2/texture_from_pixmap.c b/src/egl/opengles2/texture_from_pixmap.c
new file mode 100644
index 0000000..5e47468
--- /dev/null
+++ b/src/egl/opengles2/texture_from_pixmap.c
@@ -0,0 +1,653 @@
+/*
+ * 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
+ * THE AUTHORS OR COPYRIGHT HOLDERS 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>
+ * Shuang He <shuang.he at intel.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 <GLES2/gl2.h>
+#include <GLES2/gl2ext.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 */
+ } animate;
+
+ struct {
+ Bool active;
+ int x1, y1;
+ int x2, y2;
+ } paint;
+ int prog;
+ int vs;
+ int fs;
+};
+
+enum pigilt_attrib_location {
+ PIGLIT_ATTRIB_POS,
+ PIGLIT_ATTRIB_TEX
+};
+
+static const char vertex_shader[] =
+"attribute vec3 pos;\n"
+"attribute vec3 tex;\n"
+"\n"
+"\n"
+"varying mediump vec2 texCoord;\n"
+"\n"
+"void main(void)\n"
+"{\n"
+" gl_Position = vec4(pos, 1.0);\n"
+" texCoord = tex.xy;\n"
+"}";
+
+static const char fragment_shader[] =
+"uniform sampler2D texid;\n"
+"varying mediump vec2 texCoord;\n"
+"\n"
+"void main(void)\n"
+"{\n"
+" gl_FragColor = texture2D(texid, texCoord);\n"
+"}";
+
+
+static void
+gl_redraw(void)
+{
+ float verts[4][4];
+ float tex[4][2];
+ float x = -0.5;
+ float y = -0.5;
+ float w = 1.0;
+ float h = 1.0;
+ float tx = 0.0;
+ float ty = 1.0;
+ float tw = 1.0;
+ float th = -1.0;
+
+ verts[0][0] = x;
+ verts[0][1] = y;
+ verts[0][2] = 0.0;
+ verts[0][3] = 1.0;
+ tex[0][0] = tx;
+ tex[0][1] = ty;
+ verts[1][0] = x + w;
+ verts[1][1] = y;
+ verts[1][2] = 0.0;
+ verts[1][3] = 1.0;
+ tex[1][0] = tx + tw;
+ tex[1][1] = ty;
+ verts[2][0] = x;
+ verts[2][1] = y + h;
+ verts[2][2] = 0.0;
+ verts[2][3] = 1.0;
+ tex[2][0] = tx;
+ tex[2][1] = ty + th;
+ verts[3][0] = x + w;
+ verts[3][1] = y + h;
+ verts[3][2] = 0.0;
+ verts[3][3] = 1.0;
+ tex[3][0] = tx + tw;
+ tex[3][1] = ty + th;
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+ glVertexAttribPointer(PIGLIT_ATTRIB_POS, 4, GL_FLOAT, GL_FALSE, 0, verts);
+ glVertexAttribPointer(PIGLIT_ATTRIB_TEX, 2, GL_FLOAT, GL_FALSE, 0, tex);
+ glEnableVertexAttribArray(PIGLIT_ATTRIB_POS);
+ glEnableVertexAttribArray(PIGLIT_ATTRIB_TEX);
+ glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+ glDisableVertexAttribArray(PIGLIT_ATTRIB_POS);
+ glDisableVertexAttribArray(PIGLIT_ATTRIB_TEX);
+}
+
+static void
+gl_reshape(int width, int height)
+{
+ GLfloat ar = (GLfloat) width / (GLfloat) height;
+
+ glViewport(0, 0, width, height);
+}
+
+static void
+app_redraw(struct app_data *data)
+{
+ /* pixmap has changed */
+ if (data->reshape || data->paint.active) {
+ /*
+ * The extension only states that
+ *
+ * If an application specifies an EGLImage sibling as the destination
+ * for rendering and/or pixel download operations (e.g., as an
+ * OpenGL-ES framebuffer object, glTexSubImage2D, etc.), the modified
+ * image results will be observed by all EGLImage siblings in all
+ * client API contexts.
+ *
+ * Though not required by the drivers I tested, I think the rules of
+ * "Propagating Changes to Objects" should apply here. That is, the
+ * changes made by the native engine must be completed and the resource
+ * must be re-attached.
+ */
+ eglWaitNative(EGL_CORE_NATIVE_ENGINE);
+ 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);
+
+ gl_redraw();
+ 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) {
+ /* 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)
+{
+ int ok, err;
+ char msg[512];
+ const char *p;
+
+ glClearColor(1.0, 0.1, 0.3, 0.0);
+
+ 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);
+
+ data->prog = glCreateProgram();
+ glBindAttribLocation(data->prog, PIGLIT_ATTRIB_POS, "pos");
+ glBindAttribLocation(data->prog, PIGLIT_ATTRIB_TEX, "tex");
+
+ p = vertex_shader;
+ data->vs = glCreateShader(GL_VERTEX_SHADER);
+ glShaderSource(data->vs, 1, &p, NULL);
+ glCompileShader(data->vs);
+ glGetShaderiv(data->vs, GL_COMPILE_STATUS, &ok);
+ int length;
+ glGetShaderInfoLog(data->vs, sizeof msg, &length, msg);
+ printf("vertex shader info: %s\n", msg);
+
+ /* Compile the fragment shader */
+ p = fragment_shader;
+ data->fs = glCreateShader(GL_FRAGMENT_SHADER);
+ glShaderSource(data->fs, 1, &p, NULL);
+ glCompileShader(data->fs);
+ glGetShaderiv(data->fs, GL_COMPILE_STATUS, &ok);
+
+ glGetShaderInfoLog(data->fs, sizeof msg, NULL, msg);
+ printf("fragment shader info: %s\n", msg);
+
+ glAttachShader(data->prog, data->vs);
+ glAttachShader(data->prog, data->fs);
+ glLinkProgram(data->prog);
+ glDeleteShader(data->vs);
+ glDeleteShader(data->fs);
+
+ glGetProgramiv(data->prog, GL_LINK_STATUS, &ok);
+ if (!ok) {
+ GLchar *info;
+ GLint size;
+
+ glGetProgramiv(data->prog, GL_INFO_LOG_LENGTH, &size);
+ info = malloc(size);
+
+ glGetProgramInfoLog(data->prog, size, NULL, info);
+ fprintf(stderr, "Failed to link:\n%s\n", info);
+
+ free(info);
+ }
+
+ glUseProgram(data->prog);
+
+}
+
+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);
+ 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_ES2_BIT,
+ EGL_NONE
+ };
+ static const EGLint ctx_attribs[] = {
+ EGL_CONTEXT_CLIENT_VERSION, 2,
+ 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;
+}
--
1.7.4.rc2.21.g8671.dirty
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