#include "glheader.h"
-#include "imports.h"
+
#include "context.h"
#include "extensions.h"
#include "macros.h"
struct gl_extensions _mesa_extension_override_enables;
struct gl_extensions _mesa_extension_override_disables;
-static char *unrecognized_extensions = NULL;
+#define MAX_UNRECOGNIZED_EXTENSIONS 16
+static struct {
+ char *env;
+ const char *names[MAX_UNRECOGNIZED_EXTENSIONS];
+} unrecognized_extensions;
/**
* Given a member \c x of struct gl_extensions, return offset of
*/
#define o(x) offsetof(struct gl_extensions, x)
+static int
+extension_name_compare(const void *name, const void *elem)
+{
+ const struct mesa_extension *entry = elem;
+ return strcmp(name, entry->name);
+}
+
/**
* Given an extension name, lookup up the corresponding member of struct
* gl_extensions and return that member's index. If the name is
static int
name_to_index(const char* name)
{
- unsigned i;
+ const struct mesa_extension *entry;
- if (name == 0)
+ if (!name)
return -1;
- for (i = 0; i < MESA_EXTENSION_COUNT; ++i) {
- if (strcmp(name, _mesa_extension_table[i].name) == 0)
- return i;
- }
+ entry = bsearch(name,
+ _mesa_extension_table, MESA_EXTENSION_COUNT,
+ sizeof(_mesa_extension_table[0]),
+ extension_name_compare);
+
+ if (entry)
+ return entry - _mesa_extension_table;
return -1;
}
ctx->Extensions.ATI_texture_compression_3dc = GL_TRUE;
ctx->Extensions.ATI_texture_env_combine3 = GL_TRUE;
ctx->Extensions.ATI_texture_mirror_once = GL_TRUE;
- ctx->Extensions.ATI_separate_stencil = GL_TRUE;
ctx->Extensions.EXT_blend_color = GL_TRUE;
ctx->Extensions.EXT_blend_equation_separate = GL_TRUE;
ctx->Extensions.EXT_blend_func_separate = GL_TRUE;
static void
free_unknown_extensions_strings(void)
{
- free(unrecognized_extensions);
+ free(unrecognized_extensions.env);
+ for (int i = 0; i < MAX_UNRECOGNIZED_EXTENSIONS; ++i)
+ unrecognized_extensions.names[i] = NULL;
}
* - Collect unrecognized extension names in a new string.
*/
void
-_mesa_one_time_init_extension_overrides(struct gl_context *ctx)
+_mesa_one_time_init_extension_overrides(void)
{
const char *env_const = getenv("MESA_EXTENSION_OVERRIDE");
char *env;
if (!warned) {
warned = true;
- _mesa_problem(ctx, "Trying to enable too many unknown extension. "
- "Only the first %d will be honoured",
- MAX_UNRECOGNIZED_EXTENSIONS);
+ _mesa_problem(NULL, "Trying to enable too many unknown extension. "
+ "Only the first %d will be honoured",
+ MAX_UNRECOGNIZED_EXTENSIONS);
}
} else {
- ctx->Extensions.unrecognized_extensions[unknown_ext] = ext;
+ unrecognized_extensions.names[unknown_ext] = ext;
unknown_ext++;
-
- _mesa_problem(ctx, "Trying to enable unknown extension: %s", ext);
+ _mesa_problem(NULL, "Trying to enable unknown extension: %s", ext);
}
}
}
if (!unknown_ext) {
free(env);
} else {
- unrecognized_extensions = env;
+ unrecognized_extensions.env = env;
atexit(free_unknown_extensions_strings);
}
}
return (ctx->Version >= ext->version[ctx->API]) && base[ext->offset];
}
+/**
+ * Compare two entries of the extensions table. Sorts first by year,
+ * then by name.
+ *
+ * Arguments are indices into _mesa_extension_table.
+ */
+static int
+extension_compare(const void *p1, const void *p2)
+{
+ extension_index i1 = * (const extension_index *) p1;
+ extension_index i2 = * (const extension_index *) p2;
+ const struct mesa_extension *e1 = &_mesa_extension_table[i1];
+ const struct mesa_extension *e2 = &_mesa_extension_table[i2];
+ int res;
+
+ res = (int)e1->year - (int)e2->year;
+
+ if (res == 0) {
+ res = strcmp(e1->name, e2->name);
+ }
+
+ return res;
+}
+
/**
* Construct the GL_EXTENSIONS string. Called the first time that
if (i->year <= maxYear &&
_mesa_extension_supported(ctx, k)) {
- length += strlen(i->name) + 1; /* +1 for space */
- extension_indices[count++] = k;
+ length += strlen(i->name) + 1; /* +1 for space */
+ ++count;
}
}
for (k = 0; k < MAX_UNRECOGNIZED_EXTENSIONS; k++)
- if (ctx->Extensions.unrecognized_extensions[k])
- length += 1 + strlen(ctx->Extensions.unrecognized_extensions[k]); /* +1 for space */
+ if (unrecognized_extensions.names[k])
+ length += 1 + strlen(unrecognized_extensions.names[k]); /* +1 for space */
exts = calloc(ALIGN(length + 1, 4), sizeof(char));
if (exts == NULL) {
return NULL;
}
+ /* Sort extensions in chronological order because idTech 2/3 games
+ * (e.g., Quake3 demo) store the extension list in a fixed size buffer.
+ * Some cases truncate, while others overflow the buffer. Resulting in
+ * misrendering and crashes, respectively.
+ * Address the former here, while the latter will be addressed by setting
+ * the MESA_EXTENSION_MAX_YEAR environment variable.
+ */
+ j = 0;
+ for (k = 0; k < MESA_EXTENSION_COUNT; ++k) {
+ if (_mesa_extension_table[k].year <= maxYear &&
+ _mesa_extension_supported(ctx, k)) {
+ extension_indices[j++] = k;
+ }
+ }
+ assert(j == count);
+ qsort(extension_indices, count,
+ sizeof *extension_indices, extension_compare);
+
/* Build the extension string.*/
for (j = 0; j < count; ++j) {
const struct mesa_extension *i = &_mesa_extension_table[extension_indices[j]];
strcat(exts, " ");
}
for (j = 0; j < MAX_UNRECOGNIZED_EXTENSIONS; j++) {
- if (ctx->Extensions.unrecognized_extensions[j]) {
- strcat(exts, ctx->Extensions.unrecognized_extensions[j]);
+ if (unrecognized_extensions.names[j]) {
+ strcat(exts, unrecognized_extensions.names[j]);
strcat(exts, " ");
}
}
}
for (k = 0; k < MAX_UNRECOGNIZED_EXTENSIONS; ++k) {
- if (ctx->Extensions.unrecognized_extensions[k])
- ctx->Extensions.Count++;
+ if (unrecognized_extensions.names[k])
+ ctx->Extensions.Count++;
}
return ctx->Extensions.Count;
}
}
for (i = 0; i < MAX_UNRECOGNIZED_EXTENSIONS; ++i) {
- if (ctx->Extensions.unrecognized_extensions[i]) {
+ if (unrecognized_extensions.names[i]) {
if (n == index)
- return (const GLubyte*) ctx->Extensions.unrecognized_extensions[i];
+ return (const GLubyte*) unrecognized_extensions.names[i];
else
++n;
}
projects / mesa.git / blobdiff