Change the format to [MAJOR.MINOR][CORE|COMPAT]
For example: 3.0, CORE, COMPAT, 3.2CORE
Signed-off-by: Jordan Justen <jordan.l.jus...@intel.com>
---
docs/envvars.html | 11 +++--
src/mesa/main/context.c | 4 ++
src/mesa/main/version.c | 104 ++++++++++++++++++++++++++++++++++++++++++-----
src/mesa/main/version.h | 3 ++
4 files changed, 108 insertions(+), 14 deletions(-)
diff --git a/docs/envvars.html b/docs/envvars.html
index 89f7173..a42018e 100644
--- a/docs/envvars.html
+++ b/docs/envvars.html
@@ -62,9 +62,14 @@ If the extension string is too long, the buffer overrun can
cause the game
to crash.
This is a work-around for that.
<li>MESA_GL_VERSION_OVERRIDE - changes the value returned by
-glGetString(GL_VERSION). Valid values are point-separated version numbers,
-such as "3.0". Mesa will not really implement all the features of the given
-version if it's higher than what's normally reported.
+glGetString(GL_VERSION) and/or the GL API type.
+<ul>
+<li> The format should be [MAJOR.MINOR][CORE|COMPAT]
+<li> Some valid examples are: 3.0, CORE, COMPAT, 3.2CORE
+<li> 3.0 - override the version, but not affect the API type
+<li> CORE or COMPAT - override the API type, but not affect the version
+<li> 3.2CORE - override both the version and the API type
+</ul>
<li>MESA_GLSL_VERSION_OVERRIDE - changes the value returned by
glGetString(GL_SHADING_LANGUAGE_VERSION). Valid values are integers, such as
"130". Mesa will not really implement all the features of the given language
version
diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index feddbaa..a31cada 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -932,6 +932,10 @@ _mesa_initialize_context(struct gl_context *ctx,
ctx->WinSysDrawBuffer = NULL;
ctx->WinSysReadBuffer = NULL;
+ if (_mesa_is_desktop_gl(ctx)) {
+ _mesa_override_gl_version(ctx);
+ }
+
/* misc one-time initializations */
one_time_init(ctx);
diff --git a/src/mesa/main/version.c b/src/mesa/main/version.c
index 512a9d7..3187e7a 100644
--- a/src/mesa/main/version.c
+++ b/src/mesa/main/version.c
@@ -55,6 +55,98 @@ override_version(struct gl_context *ctx)
}
/**
+ * Scans 'string' to see if it ends with 'ending' and if it
+ * does, 'string' is modified to remove the ending value.
+ */
+static GLboolean
+check_for_ending_and_remove(char *string, const char *ending)
+{
+ int len1, len2;
+
+ len1 = strlen(string);
+ len2 = strlen(ending);
+
+ if (len2 > len1) {
+ return GL_FALSE;
+ }
+
+ if (strcmp(string + (len1 - len2), ending) == 0) {
+ string[len1 - len2] = 0;
+ return GL_TRUE;
+ } else {
+ return GL_FALSE;
+ }
+}
+
+/**
+ * Scans 'string' to see if it ends with 'ending' and if it
+ * does, 'string' is modified to remove the ending value.
+ */
+static GLboolean
+create_gl_version_string(struct gl_context *ctx)
+{
+ static const int max = 100;
+
+ ctx->VersionString = (char *) malloc(max);
+ if (ctx->VersionString) {
+ _mesa_snprintf(ctx->VersionString, max,
+ "%u.%u Mesa " MESA_VERSION_STRING
+#ifdef MESA_GIT_SHA1
+ " (" MESA_GIT_SHA1 ")"
+#endif
+ ,
+ _mesa_get_version_major(ctx),
_mesa_get_version_minor(ctx));
+ }
+}
+
+/**
+ * Override the context's version and/or API type if the
+ * environment variable MESA_GL_VERSION_OVERRIDE is set.
+ *
+ * Example uses of MESA_GL_VERSION_OVERRIDE:
+ *
+ * 3.0: Override version to 3.0, but don't change API type
+ * COMPAT: Override API type to API_OPENGL, but don't change the version
+ * CORE: Override API type to API_OPENGL_CORE, but don't change the version
+ * 3.2CORE: Override API type to API_OPENGL_CORE, and the version to 3.2
+ */
+void
+_mesa_override_gl_version(struct gl_context *ctx)
+{
+ const char *env_var = "MESA_GL_VERSION_OVERRIDE";
+ const char *version;
+ char *version_dup;
+ int n;
+ int major, minor;
+
+ version = getenv(env_var);
+ if (!version) {
+ return;
+ }
+
+ version_dup = strdup(version);
+ assert (version != NULL);
+
+ if (check_for_ending_and_remove(version_dup, "CORE")) {
+ ctx->API = API_OPENGL_CORE;
+ } else if (check_for_ending_and_remove(version_dup, "COMPAT")) {
+ ctx->API = API_OPENGL;
+ }
+
+ if (version_dup[0] != 0) {
+ n = sscanf(version, "%u.%u", &major, &minor);
+ if (n != 2) {
+ fprintf(stderr, "error: invalid value for %s: %s\n", env_var,
version);
+ } else {
+ _mesa_set_version(ctx, major, minor);
+ create_gl_version_string(ctx);
+ }
+ }
+
+ free(version_dup);
+}
+
+/**
* Override the context's GLSL version if the environment variable
* MESA_GLSL_VERSION_OVERRIDE is set. Valid values for
* MESA_GLSL_VERSION_OVERRIDE are integers, such as "130".
@@ -85,7 +177,6 @@ static void
compute_version(struct gl_context *ctx)
{
GLuint major, minor;
- static const int max = 100;
const GLboolean ver_1_3 = (ctx->Extensions.ARB_texture_border_clamp &&
ctx->Extensions.ARB_texture_cube_map &&
@@ -224,16 +315,7 @@ compute_version(struct gl_context *ctx)
override_version(ctx);
- ctx->VersionString = (char *) malloc(max);
- if (ctx->VersionString) {
- _mesa_snprintf(ctx->VersionString, max,
- "%u.%u Mesa " MESA_VERSION_STRING
-#ifdef MESA_GIT_SHA1
- " (" MESA_GIT_SHA1 ")"
-#endif
- ,
- major, minor);
- }
+ create_gl_version_string(ctx);
}
static void
diff --git a/src/mesa/main/version.h b/src/mesa/main/version.h
index d60cde6..992bb74 100644
--- a/src/mesa/main/version.h
+++ b/src/mesa/main/version.h
@@ -51,6 +51,9 @@ extern void
_mesa_compute_version(struct gl_context *ctx);
extern void
+_mesa_override_gl_version(struct gl_context *ctx);
+
+extern void
_mesa_override_glsl_version(struct gl_context *ctx);
/**
--
1.7.9.5
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