mesa: add GLSLVersionCompat constant

This allows drivers to define what version of GLSL they support
in compat. This will be needed in order to support compat 3.2
without breaking drivers that wont support it.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>

5 files changed, 10 insertions, 3 deletions

diff --git a/src/mesa/drivers/dri/i915/intel_extensions.c b/src/mesa/drivers/dri/i915/intel_extensions.c
index c85bd787fe7..c3851530139 100644
--- a/src/mesa/drivers/dri/i915/intel_extensions.c
+++ b/src/mesa/drivers/dri/i915/intel_extensions.c
@@ -78,6 +78,7 @@ intelInitExtensions(struct gl_context *ctx)
    ctx->Extensions.OES_draw_texture = true;
 
    ctx->Const.GLSLVersion = 120;
+   ctx->Const.GLSLVersionCompat = 120;
    _mesa_override_glsl_version(&ctx->Const);
 
    if (intel->gen >= 3) {
diff --git a/src/mesa/drivers/dri/i965/intel_extensions.c b/src/mesa/drivers/dri/i965/intel_extensions.c
index e1e19217bc9..b5860f13cb4 100644
--- a/src/mesa/drivers/dri/i965/intel_extensions.c
+++ b/src/mesa/drivers/dri/i965/intel_extensions.c
@@ -148,6 +148,12 @@ intelInitExtensions(struct gl_context *ctx)
       ctx->Const.GLSLVersion = 330;
    else
       ctx->Const.GLSLVersion = 120;
+
+   if (devinfo->gen >= 6)
+      ctx->Const.GLSLVersionCompat = 130;
+   else
+      ctx->Const.GLSLVersionCompat = 120;
+
    _mesa_override_glsl_version(&ctx->Const);
 
    ctx->Extensions.EXT_shader_integer_mix = ctx->Const.GLSLVersion >= 130;
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index 2d3eb457f9b..2c87308dd73 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -3649,6 +3649,7 @@ struct gl_constants
    GLuint MaxGeometryTotalOutputComponents;
 
    GLuint GLSLVersion;  /**< Desktop GLSL version supported (ex: 120 = 1.20) */
+   GLuint GLSLVersionCompat;  /**< Desktop compat GLSL version supported  */
 
    /**
     * Changes default GLSL extension behavior from "error" to "warn".  It's out
diff --git a/src/mesa/main/version.c b/src/mesa/main/version.c
index 84babd69e2f..3f3dff0bde3 100644
--- a/src/mesa/main/version.c
+++ b/src/mesa/main/version.c
@@ -588,9 +588,7 @@ _mesa_get_version(const struct gl_extensions *extensions,
       /* Disable higher GLSL versions for legacy contexts.
        * This disallows creation of higher compatibility contexts. */
       if (!consts->AllowHigherCompatVersion) {
-         if (consts->GLSLVersion > 140) {
-            consts->GLSLVersion = 140;
-         }
+         consts->GLSLVersion = consts->GLSLVersionCompat;
       }
       /* fall through */
    case API_OPENGL_CORE:
diff --git a/src/mesa/state_tracker/st_extensions.c b/src/mesa/state_tracker/st_extensions.c
index 5479e637aff..19ef736e5b0 100644
--- a/src/mesa/state_tracker/st_extensions.c
+++ b/src/mesa/state_tracker/st_extensions.c
@@ -936,6 +936,7 @@ void st_init_extensions(struct pipe_screen *screen,
 
    /* Figure out GLSL support and set GLSLVersion to it. */
    consts->GLSLVersion = screen->get_param(screen, PIPE_CAP_GLSL_FEATURE_LEVEL);
+   consts->GLSLVersionCompat = 140;
 
    _mesa_override_glsl_version(consts);