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+/**************************************************************************
+ *
+ * Copyright 2011 Jose Fonseca
+ * All Rights Reserved.
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+
+#include <string.h>
+
+#include "image.hpp"
+#include "retrace.hpp"
+#include "glproc.hpp"
+#include "glretrace.hpp"
+
+
+namespace glretrace {
+
+bool double_buffer = false;
+bool insideGlBeginEnd = false;
+Trace::Parser parser;
+glws::WindowSystem *ws = NULL;
+glws::Visual *visual = NULL;
+glws::Drawable *drawable = NULL;
+glws::Context *context = NULL;
+
+int window_width = 256, window_height = 256;
+bool reshape_window = false;
+
+unsigned frame = 0;
+long long startTime = 0;
+bool wait = false;
+
+bool benchmark = false;
+const char *compare_prefix = NULL;
+const char *snapshot_prefix = NULL;
+
+unsigned dump_state = ~0;
+
+void
+checkGlError(void) {
+ if (benchmark || insideGlBeginEnd) {
+ return;
+ }
+
+ GLenum error = glGetError();
+ if (error == GL_NO_ERROR) {
+ return;
+ }
+
+ std::cerr << "warning: glGetError() = ";
+ switch (error) {
+ case GL_INVALID_ENUM:
+ std::cerr << "GL_INVALID_ENUM";
+ break;
+ case GL_INVALID_VALUE:
+ std::cerr << "GL_INVALID_VALUE";
+ break;
+ case GL_INVALID_OPERATION:
+ std::cerr << "GL_INVALID_OPERATION";
+ break;
+ case GL_STACK_OVERFLOW:
+ std::cerr << "GL_STACK_OVERFLOW";
+ break;
+ case GL_STACK_UNDERFLOW:
+ std::cerr << "GL_STACK_UNDERFLOW";
+ break;
+ case GL_OUT_OF_MEMORY:
+ std::cerr << "GL_OUT_OF_MEMORY";
+ break;
+ case GL_INVALID_FRAMEBUFFER_OPERATION:
+ std::cerr << "GL_INVALID_FRAMEBUFFER_OPERATION";
+ break;
+ case GL_TABLE_TOO_LARGE:
+ std::cerr << "GL_TABLE_TOO_LARGE";
+ break;
+ default:
+ std::cerr << error;
+ break;
+ }
+ std::cerr << "\n";
+}
+
+
+static void snapshot(Image::Image &image) {
+ GLint drawbuffer = double_buffer ? GL_BACK : GL_FRONT;
+ GLint readbuffer = double_buffer ? GL_BACK : GL_FRONT;
+ glGetIntegerv(GL_READ_BUFFER, &drawbuffer);
+ glGetIntegerv(GL_READ_BUFFER, &readbuffer);
+ glReadBuffer(drawbuffer);
+ glReadPixels(0, 0, image.width, image.height, GL_RGBA, GL_UNSIGNED_BYTE, image.pixels);
+ checkGlError();
+ glReadBuffer(readbuffer);
+}
+
+
+static void frame_complete(void) {
+ ++frame;
+
+ if (!reshape_window && (snapshot_prefix || compare_prefix)) {
+ Image::Image *ref = NULL;
+ if (compare_prefix) {
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s%04u.png", compare_prefix, frame);
+ ref = Image::readPNG(filename);
+ if (!ref) {
+ return;
+ }
+ if (retrace::verbosity >= 0)
+ std::cout << "Read " << filename << "\n";
+ }
+
+ Image::Image src(window_width, window_height, true);
+ snapshot(src);
+
+ if (snapshot_prefix) {
+ char filename[PATH_MAX];
+ snprintf(filename, sizeof filename, "%s%04u.png", snapshot_prefix, frame);
+ if (src.writePNG(filename) && retrace::verbosity >= 0) {
+ std::cout << "Wrote " << filename << "\n";
+ }
+ }
+
+ if (ref) {
+ std::cout << "Frame " << frame << " average precision of " << src.compare(*ref) << " bits\n";
+ delete ref;
+ }
+ }
+
+ if (reshape_window) {
+ // XXX: doesn't quite work
+ drawable->resize(window_width, window_height);
+ reshape_window = false;
+ }
+
+ ws->processEvents();
+}
+
+
+static void display(void) {
+ Trace::Call *call;
+
+ while ((call = parser.parse_call())) {
+ const std::string &name = call->name();
+
+ if ((name[0] == 'w' && name[1] == 'g' && name[2] == 'l') ||
+ (name[0] == 'g' && name[1] == 'l' && name[2] == 'X')) {
+ // XXX: We ignore the majority of the OS-specific calls for now
+ if (name == "glXSwapBuffers" ||
+ name == "wglSwapBuffers") {
+ if (retrace::verbosity >= 1) {
+ std::cout << *call;
+ std::cout.flush();
+ };
+ frame_complete();
+ if (double_buffer)
+ drawable->swapBuffers();
+ else
+ glFlush();
+ } else if (name == "glXMakeCurrent" ||
+ name == "wglMakeCurrent") {
+ glFlush();
+ if (!double_buffer) {
+ frame_complete();
+ }
+ } else {
+ continue;
+ }
+ }
+
+ if (name == "glFlush") {
+ glFlush();
+ if (!double_buffer) {
+ frame_complete();
+ }
+ }
+
+ retrace::retrace_call(*call);
+
+ if (!insideGlBeginEnd && call->no >= dump_state) {
+ state_dump(std::cout);
+ exit(0);
+ }
+
+ delete call;
+ }
+
+ // Reached the end of trace
+ glFlush();
+
+ long long endTime = OS::GetTime();
+ float timeInterval = (endTime - startTime) * 1.0E-6;
+
+ if (retrace::verbosity >= -1) {
+ std::cout <<
+ "Rendered " << frame << " frames"
+ " in " << timeInterval << " secs,"
+ " average of " << (frame/timeInterval) << " fps\n";
+ }
+
+ if (wait) {
+ while (ws->processEvents()) {}
+ } else {
+ exit(0);
+ }
+}
+
+
+static void usage(void) {
+ std::cout <<
+ "Usage: glretrace [OPTION] TRACE\n"
+ "Replay TRACE.\n"
+ "\n"
+ " -b benchmark (no glgeterror; no messages)\n"
+ " -c PREFIX compare against snapshots\n"
+ " -db use a double buffer visual\n"
+ " -s PREFIX take snapshots\n"
+ " -v verbose output\n"
+ " -D CALLNO dump state at specific call no\n"
+ " -w wait on final frame\n";
+}
+
+extern "C"
+int main(int argc, char **argv)
+{
+
+ int i;
+ for (i = 1; i < argc; ++i) {
+ const char *arg = argv[i];
+
+ if (arg[0] != '-') {
+ break;
+ }
+
+ if (!strcmp(arg, "--")) {
+ break;
+ } else if (!strcmp(arg, "-b")) {
+ benchmark = true;
+ retrace::verbosity = -1;
+ } else if (!strcmp(arg, "-c")) {
+ compare_prefix = argv[++i];
+ } else if (!strcmp(arg, "-D")) {
+ dump_state = atoi(argv[++i]);
+ retrace::verbosity = -2;
+ } else if (!strcmp(arg, "-db")) {
+ double_buffer = true;
+ } else if (!strcmp(arg, "--help")) {
+ usage();
+ return 0;
+ } else if (!strcmp(arg, "-s")) {
+ snapshot_prefix = argv[++i];
+ } else if (!strcmp(arg, "-v")) {
+ ++retrace::verbosity;
+ } else if (!strcmp(arg, "-w")) {
+ wait = true;
+ } else {
+ std::cerr << "error: unknown option " << arg << "\n";
+ usage();
+ return 1;
+ }
+ }
+
+ ws = glws::createNativeWindowSystem();
+ visual = ws->createVisual(double_buffer);
+ drawable = ws->createDrawable(visual);
+ drawable->resize(window_width, window_height);
+ context = ws->createContext(visual);
+ ws->makeCurrent(drawable, context);
+
+ for ( ; i < argc; ++i) {
+ if (parser.open(argv[i])) {
+ startTime = OS::GetTime();
+ display();
+ parser.close();
+ }
+ }
+
+ return 0;
+}
+
+} /* namespace glretrace */
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