#include "macros.h"
#include "mtypes.h"
+struct gl_extensions _mesa_extension_override_enables;
+struct gl_extensions _mesa_extension_override_disables;
+static char *extra_extensions = NULL;
+static char *cant_disable_extensions = NULL;
+
enum {
DISABLE = 0,
GLL = 1 << API_OPENGL_COMPAT, /* GL Legacy / Compatibility */
return 0;
}
+/**
+ * Overrides extensions in \c ctx based on the values in
+ * _mesa_extension_override_enables and _mesa_extension_override_disables.
+ */
+static void
+override_extensions_in_context(struct gl_context *ctx)
+{
+ const struct extension *i;
+ const GLboolean *enables =
+ (GLboolean*) &_mesa_extension_override_enables;
+ const GLboolean *disables =
+ (GLboolean*) &_mesa_extension_override_disables;
+ GLboolean *ctx_ext = (GLboolean*)&ctx->Extensions;
+
+ for (i = extension_table; i->name != 0; ++i) {
+ size_t offset = i->offset;
+ assert(!enables[offset] || !disables[offset]);
+ if (enables[offset]) {
+ ctx_ext[offset] = 1;
+ } else if (disables[offset]) {
+ ctx_ext[offset] = 0;
+ }
+ }
+}
+
/**
* Enable all extensions suitable for a software-only renderer.
/**
* Either enable or disable the named extension.
- * \return GL_TRUE for success, GL_FALSE if invalid extension name
+ * \return offset of extensions withint `ext' or 0 if extension is not known
*/
-static GLboolean
-set_extension( struct gl_context *ctx, const char *name, GLboolean state )
+static size_t
+set_extension(struct gl_extensions *ext, const char *name, GLboolean state)
{
size_t offset;
- if (ctx->Extensions.String) {
- /* The string was already queried - can't change it now! */
- _mesa_problem(ctx, "Trying to enable/disable extension after "
- "glGetString(GL_EXTENSIONS): %s", name);
- return GL_FALSE;
- }
-
offset = name_to_offset(name);
- if (offset == 0) {
- _mesa_problem(ctx, "Trying to enable/disable unknown extension %s",
- name);
- return GL_FALSE;
- } else if (offset == o(dummy_true) && state == GL_FALSE) {
- _mesa_problem(ctx, "Trying to disable a permanently enabled extension: "
- "%s", name);
- return GL_FALSE;
- } else {
- GLboolean *base = (GLboolean *) &ctx->Extensions;
- base[offset] = state;
- return GL_TRUE;
+ if (offset != 0 && (offset != o(dummy_true) || state != GL_FALSE)) {
+ ((GLboolean *) ext)[offset] = state;
}
+
+ return offset;
}
/**
* - Enable recognized extension names that are not prefixed.
* - Collect unrecognized extension names in a new string.
*
+ * \c MESA_EXTENSION_OVERRIDE was previously parsed during
+ * _mesa_one_time_init_extension_overrides. We just use the results of that
+ * parsing in this function.
+ *
* \return Space-separated list of unrecognized extension names (which must
* be freed). Does not return \c NULL.
*/
static char *
get_extension_override( struct gl_context *ctx )
+{
+ override_extensions_in_context(ctx);
+
+ if (cant_disable_extensions != NULL) {
+ _mesa_problem(ctx,
+ "Trying to disable permanently enabled extensions: %s",
+ cant_disable_extensions);
+ }
+
+ if (extra_extensions == NULL) {
+ return calloc(1, sizeof(char));
+ } else {
+ _mesa_problem(ctx, "Trying to enable unknown extensions: %s",
+ extra_extensions);
+ return strdup(extra_extensions);
+ }
+}
+
+
+/**
+ * \brief Free extra_extensions and cant_disable_extensions strings
+ *
+ * These strings are allocated early during the first context creation by
+ * _mesa_one_time_init_extension_overrides.
+ */
+static void
+free_unknown_extensions_strings(void)
+{
+ free(extra_extensions);
+ free(cant_disable_extensions);
+}
+
+
+/**
+ * \brief Initialize extension override tables.
+ *
+ * This should be called one time early during first context initialization.
+ */
+void
+_mesa_one_time_init_extension_overrides(void)
{
const char *env_const = _mesa_getenv("MESA_EXTENSION_OVERRIDE");
char *env;
char *ext;
- char *extra_exts;
int len;
+ size_t offset;
+
+ atexit(free_unknown_extensions_strings);
+
+ memset(&_mesa_extension_override_enables, 0, sizeof(struct gl_extensions));
+ memset(&_mesa_extension_override_disables, 0, sizeof(struct gl_extensions));
if (env_const == NULL) {
- /* Return the empty string rather than NULL. This simplifies the logic
- * of client functions. */
- return calloc(4, sizeof(char));
+ return;
}
/* extra_exts: List of unrecognized extensions. */
- extra_exts = calloc(ALIGN(strlen(env_const) + 2, 4), sizeof(char));
+ extra_extensions = calloc(ALIGN(strlen(env_const) + 2, 4), sizeof(char));
+ cant_disable_extensions = calloc(ALIGN(strlen(env_const) + 2, 4), sizeof(char));
/* Copy env_const because strtok() is destructive. */
env = strdup(env_const);
for (ext = strtok(env, " "); ext != NULL; ext = strtok(NULL, " ")) {
int enable;
- int recognized;
+ bool recognized;
switch (ext[0]) {
case '+':
enable = 1;
enable = 1;
break;
}
- recognized = set_extension(ctx, ext, enable);
+
+ offset = set_extension(&_mesa_extension_override_enables, ext, enable);
+ if (offset != 0 && (offset != o(dummy_true) || enable != GL_FALSE)) {
+ ((GLboolean *) &_mesa_extension_override_disables)[offset] = !enable;
+ recognized = true;
+ } else {
+ recognized = false;
+ }
+
if (!recognized) {
- strcat(extra_exts, ext);
- strcat(extra_exts, " ");
+ if (enable) {
+ strcat(extra_extensions, ext);
+ strcat(extra_extensions, " ");
+ } else if (offset == o(dummy_true)) {
+ strcat(cant_disable_extensions, ext);
+ strcat(cant_disable_extensions, " ");
+ }
}
}
free(env);
- /* Remove trailing space. */
- len = strlen(extra_exts);
- if (len > 0 && extra_exts[len - 1] == ' ')
- extra_exts[len - 1] = '\0';
-
- return extra_exts;
+ /* Remove trailing space, and free if unused. */
+ len = strlen(extra_extensions);
+ if (len == 0) {
+ free(extra_extensions);
+ extra_extensions = NULL;
+ } else if (extra_extensions[len - 1] == ' ') {
+ extra_extensions[len - 1] = '\0';
+ }
+ len = strlen(cant_disable_extensions);
+ if (len == 0) {
+ free(cant_disable_extensions);
+ cant_disable_extensions = NULL;
+ } else if (cant_disable_extensions[len - 1] == ' ') {
+ cant_disable_extensions[len - 1] = '\0';
+ }
}
projects / mesa.git / blobdiff