#include <limits.h> // for CHAR_MAX
#include <getopt.h>
+#include <GL/gl.h>
+#include <GL/glext.h>
+
#include <set>
#include "cli.hpp"
* implicitly required by those through resource dependencies. */
std::set<unsigned> required;
+ bool transformFeedbackActive;
+ bool framebufferObjectActive;
+ bool insideBeginEnd;
+
+ /* Rendering often has no side effects, but it can in some cases,
+ * (such as when transform feedback is active, or when rendering
+ * targets a framebuffer object). */
+ bool renderingHasSideEffect() {
+ return transformFeedbackActive || framebufferObjectActive;
+ }
+
+ /* Provide: Record that the given call affects the given resource
+ * as a side effect. */
+ void provide(const char *resource, trace::CallNo call_no) {
+ resources[resource].insert(call_no);
+ }
+
+ /* Consume: Add all calls that provide the given resource to the
+ * required list, then clear the list for this resource. */
+ void consume(const char *resource) {
+
+ std::set<unsigned> *calls;
+ std::set<unsigned>::iterator call;
+
+ /* Insert as required all calls that provide 'resource',
+ * then clear these calls. */
+ if (resources.count(resource)) {
+ calls = &resources[resource];
+ for (call = calls->begin(); call != calls->end(); call++) {
+ required.insert(*call);
+ }
+ resources.erase(resource);
+ }
+ }
+
+ void stateTrackPreCall(trace::Call *call) {
+
+ if (strcmp(call->name(), "glBegin") == 0) {
+ insideBeginEnd = true;
+ return;
+ }
+
+ if (strcmp(call->name(), "glBeginTransformFeedback") == 0) {
+ transformFeedbackActive = true;
+ return;
+ }
+
+ if (strcmp(call->name(), "glBindFramebuffer") == 0) {
+ GLenum target;
+ GLuint framebuffer;
+
+ target = static_cast<GLenum>(call->arg(0).toSInt());
+ framebuffer = call->arg(1).toUInt();
+
+ if (target == GL_FRAMEBUFFER || target == GL_DRAW_FRAMEBUFFER) {
+ if (framebuffer == 0) {
+ framebufferObjectActive = false;
+ } else {
+ framebufferObjectActive = true;
+ }
+ }
+ return;
+ }
+ }
+
+ void stateTrackPostCall(trace::Call *call) {
+
+ if (strcmp(call->name(), "glEnd") == 0) {
+ insideBeginEnd = false;
+ return;
+ }
+
+ if (strcmp(call->name(), "glEndTransformFeedback") == 0) {
+ transformFeedbackActive = false;
+ return;
+ }
+
+ if (call->flags & trace::CALL_FLAG_SWAP_RENDERTARGET &&
+ call->flags & trace::CALL_FLAG_END_FRAME) {
+ resources.erase("framebuffer");
+ return;
+ }
+ }
+
+ void recordSideEffects(trace::Call *call) {
+ /* If call is flagged as no side effects, then we are done here. */
+ if (call->flags & trace::CALL_FLAG_NO_SIDE_EFFECTS) {
+ return;
+ }
+
+ /* Similarly, swap-buffers calls don't have interesting side effects. */
+ if (call->flags & trace::CALL_FLAG_SWAP_RENDERTARGET &&
+ call->flags & trace::CALL_FLAG_END_FRAME) {
+ return;
+ }
+
+ /* Handle all rendering operations, (even though only glEnd is
+ * flagged as a rendering operation we treat everything from
+ * glBegin through glEnd as a rendering operation). */
+ if (call->flags & trace::CALL_FLAG_RENDER ||
+ insideBeginEnd) {
+
+ provide("framebuffer", call->no);
+
+ /* In some cases, rendering has side effects beyond the
+ * framebuffer update. */
+ if (renderingHasSideEffect()) {
+ provide("state", call->no);
+ }
+
+ return;
+ }
+
+ /* By default, assume this call affects the state somehow. */
+ resources["state"].insert(call->no);
+ }
+
+ void requireDependencies(trace::Call *call) {
+
+ /* Swap-buffers calls depend on framebuffer state. */
+ if (call->flags & trace::CALL_FLAG_SWAP_RENDERTARGET &&
+ call->flags & trace::CALL_FLAG_END_FRAME) {
+ consume("framebuffer");
+ }
+
+ /* By default, just assume this call depends on generic state. */
+ consume("state");
+ }
+
+
public:
- TraceAnalyzer() {}
+ TraceAnalyzer(): transformFeedbackActive(false),
+ framebufferObjectActive(false),
+ insideBeginEnd(false)
+ {}
+
~TraceAnalyzer() {}
- /* Compute and record all the resources provided by this call. */
+ /* Analyze this call by tracking state and recording all the
+ * resources provided by this call as side effects.. */
void analyze(trace::Call *call) {
- resources["state"].insert(call->no);
+
+ stateTrackPreCall(call);
+
+ recordSideEffects(call);
+
+ stateTrackPostCall(call);
}
/* Require this call and all of its dependencies to be included in
* the final trace. */
void require(trace::Call *call) {
- std::set<unsigned> *dependencies;
- std::set<unsigned>::iterator i;
/* First, find and insert all calls that this call depends on. */
- dependencies = &resources["state"];
- for (i = dependencies->begin(); i != dependencies->end(); i++) {
- required.insert(*i);
- }
- resources["state"].clear();
+ requireDependencies(call);
/* Then insert this call itself. */
required.insert(call->no);
/* In pass 1, analyze which calls are needed. */
trace::Call *call;
while ((call = p.parse_call())) {
+
+ /* There's no use doing any work past the last call requested
+ * by the user. */
+ if (call->no > options->calls.getLast())
+ break;
+
/* If requested, ignore all calls not belonging to the specified thread. */
if (options->thread != -1 && call->thread_id != options->thread)
continue;
continue;
}
- /* If this call is included in the user-specified call
- * set, then we don't need to perform any analysis on
- * it. We know it must be included. */
+ /* If this call is included in the user-specified call set,
+ * then require it (and all dependencies) in the trimmed
+ * output. */
if (options->calls.contains(*call)) {
analyzer.require(call);
- } else {
- if (options->dependency_analysis)
- analyzer.analyze(call);
+ }
+
+ /* Regardless of whether we include this call or not, we do
+ * some dependency tracking (unless disabled by the user). We
+ * do this even for calls we have included in the output so
+ * that any state updates get performed. */
+ if (options->dependency_analysis) {
+ analyzer.analyze(call);
}
}
required = analyzer.get_required();
while ((call = p.parse_call())) {
+
+ /* There's no use doing any work past the last call requested
+ * by the user. */
+ if (call->no > options->calls.getLast())
+ break;
+
if (required->find(call->no) != required->end()) {
writer.writeCall(call);
}
projects / apitrace / blobdiff