--- /dev/null
+/**************************************************************************
+ *
+ * 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.
+ *
+ **************************************************************************/
+
+
+/*
+ * Manipulation of GL extensions.
+ *
+ * So far we insert GREMEDY extensions, but in the future we could also clamp
+ * the GL extensions to core GL versions here.
+ */
+
+
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <string>
+#include <map>
+
+#include "glproc.hpp"
+#include "gltrace.hpp"
+
+
+namespace gltrace {
+
+
+typedef std::map<std::string, const char *> ExtensionsMap;
+
+// Cache of the translated extensions strings
+static ExtensionsMap extensionsMap;
+
+
+// Additional extensions to be advertised
+static const char *
+extraExtension_stringsFull[] = {
+ "GL_GREMEDY_string_marker",
+ "GL_GREMEDY_frame_terminator",
+};
+
+static const char *
+extraExtension_stringsES[] = {
+ "GL_EXT_debug_marker",
+};
+
+// Description of additional extensions we want to advertise
+struct ExtensionsDesc
+{
+ unsigned numStrings;
+ const char **strings;
+};
+
+#define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))
+
+const struct ExtensionsDesc
+extraExtensionsFull = {
+ ARRAY_SIZE(extraExtension_stringsFull),
+ extraExtension_stringsFull
+};
+
+const struct ExtensionsDesc
+extraExtensionsES = {
+ ARRAY_SIZE(extraExtension_stringsES),
+ extraExtension_stringsES
+};
+
+
+const struct ExtensionsDesc *
+getExtraExtensions(void)
+{
+ Context *ctx = getContext();
+
+ switch (ctx->profile) {
+ case PROFILE_COMPAT:
+ return &extraExtensionsFull;
+ case PROFILE_ES1:
+ case PROFILE_ES2:
+ return &extraExtensionsES;
+ default:
+ assert(0);
+ return &extraExtensionsFull;
+ }
+}
+
+
+/**
+ * Translate the GL extensions string, adding new extensions.
+ */
+static const char *
+overrideExtensionsString(const char *extensions)
+{
+ const ExtensionsDesc *desc = getExtraExtensions();
+ size_t i;
+
+ ExtensionsMap::const_iterator it = extensionsMap.find(extensions);
+ if (it != extensionsMap.end()) {
+ return it->second;
+ }
+
+ size_t extensionsLen = strlen(extensions);
+
+ size_t extraExtensionsLen = 0;
+ for (i = 0; i < desc->numStrings; ++i) {
+ const char * extraExtension = desc->strings[i];
+ size_t extraExtensionLen = strlen(extraExtension);
+ extraExtensionsLen += extraExtensionLen + 1;
+ }
+
+ // We use malloc memory instead of a std::string because we need to ensure
+ // that extensions strings will not move in memory as the extensionsMap is
+ // updated.
+ size_t newExtensionsLen = extensionsLen + 1 + extraExtensionsLen + 1;
+ char *newExtensions = (char *)malloc(newExtensionsLen);
+ if (!newExtensions) {
+ return extensions;
+ }
+
+ if (extensionsLen) {
+ memcpy(newExtensions, extensions, extensionsLen);
+
+ // Add space separator if necessary
+ if (newExtensions[extensionsLen - 1] != ' ') {
+ newExtensions[extensionsLen++] = ' ';
+ }
+ }
+
+ for (i = 0; i < desc->numStrings; ++i) {
+ const char * extraExtension = desc->strings[i];
+ size_t extraExtensionLen = strlen(extraExtension);
+ memcpy(newExtensions + extensionsLen, extraExtension, extraExtensionLen);
+ extensionsLen += extraExtensionLen;
+ newExtensions[extensionsLen++] = ' ';
+ }
+ newExtensions[extensionsLen++] = '\0';
+ assert(extensionsLen <= newExtensionsLen);
+
+ extensionsMap[extensions] = newExtensions;
+
+ return newExtensions;
+}
+
+
+const GLubyte *
+__glGetString_override(GLenum name)
+{
+ const GLubyte *result = __glGetString(name);
+
+ if (result) {
+ switch (name) {
+ case GL_EXTENSIONS:
+ result = (const GLubyte *)overrideExtensionsString((const char *)result);
+ break;
+ default:
+ break;
+ }
+ }
+
+ return result;
+}
+
+
+void
+__glGetIntegerv_override(GLenum pname, GLint *params)
+{
+ __glGetIntegerv(pname, params);
+
+ if (params) {
+ switch (pname) {
+ case GL_NUM_EXTENSIONS:
+ {
+ const ExtensionsDesc *desc = getExtraExtensions();
+ *params += desc->numStrings;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+}
+
+
+const GLubyte *
+__glGetStringi_override(GLenum name, GLuint index)
+{
+ switch (name) {
+ case GL_EXTENSIONS:
+ {
+ const ExtensionsDesc *desc = getExtraExtensions();
+ GLint numExtensions = 0;
+ __glGetIntegerv(GL_NUM_EXTENSIONS, &numExtensions);
+ if ((GLuint)numExtensions <= index && index < (GLuint)numExtensions + desc->numStrings) {
+ return (const GLubyte *)desc->strings[index - (GLuint)numExtensions];
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
+ return __glGetStringi(name, index);
+}
+
+
+} /* namespace gltrace */
+
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