[Mesa-dev] [RFC][PATCH 3/5] mesa: Add support for AMD_depth_clamp_separate

[Sagar Ghuge]

enable _mesa_PushAttrib() and _mesa_PopAttrib()
to handle GL_DEPTH_CLAMP_NEAR_AMD and
GL_DEPTH_CLAMP_FAR_AMD tokens.

Signed-off-by: Sagar Ghuge <sagar.ghuge at intel.com>
---
 src/mesa/main/attrib.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/mesa/main/attrib.c b/src/mesa/main/attrib.c
index cbe93ab6fa..d9f165b428 100644
--- a/src/mesa/main/attrib.c
+++ b/src/mesa/main/attrib.c
@@ -73,6 +73,8 @@ struct gl_enable_attrib
    GLboolean ColorMaterial;
    GLboolean CullFace;
    GLboolean DepthClamp;
+   GLboolean DepthClampNear;
+   GLboolean DepthClampFar;
    GLboolean DepthTest;
    GLboolean Dither;
    GLboolean Fog;
@@ -337,6 +339,8 @@ _mesa_PushAttrib(GLbitfield mask)
       attr->ColorMaterial = ctx->Light.ColorMaterialEnabled;
       attr->CullFace = ctx->Polygon.CullFlag;
       attr->DepthClamp = ctx->Transform.DepthClamp;
+      attr->DepthClampNear = ctx->Transform.DepthClampNear;
+      attr->DepthClampFar = ctx->Transform.DepthClampFar;
       attr->DepthTest = ctx->Depth.Test;
       attr->Dither = ctx->Color.DitherFlag;
       attr->Fog = ctx->Fog.Enabled;
@@ -629,6 +633,10 @@ pop_enable_group(struct gl_context *ctx, const struct gl_enable_attrib *enable)
    TEST_AND_UPDATE(ctx->Polygon.CullFlag, enable->CullFace, GL_CULL_FACE);
    TEST_AND_UPDATE(ctx->Transform.DepthClamp, enable->DepthClamp,
                    GL_DEPTH_CLAMP);
+   TEST_AND_UPDATE(ctx->Transform.DepthClampNear, enable->DepthClampNear,
+                   GL_DEPTH_CLAMP_NEAR_AMD);
+   TEST_AND_UPDATE(ctx->Transform.DepthClampFar, enable->DepthClampFar,
+                   GL_DEPTH_CLAMP_FAR_AMD);
    TEST_AND_UPDATE(ctx->Depth.Test, enable->DepthTest, GL_DEPTH_TEST);
    TEST_AND_UPDATE(ctx->Color.DitherFlag, enable->Dither, GL_DITHER);
    TEST_AND_UPDATE(ctx->Fog.Enabled, enable->Fog, GL_FOG);
@@ -1150,6 +1158,8 @@ _mesa_PopAttrib(void)
                                       ctx->DriverFlags.NewClipPlaneEnable |
                                       ctx->DriverFlags.NewDepth |
                                       ctx->DriverFlags.NewDepthClamp |
+                                      ctx->DriverFlags.NewDepthClampNear |
+                                      ctx->DriverFlags.NewDepthClampFar |
                                       ctx->DriverFlags.NewFramebufferSRGB |
                                       ctx->DriverFlags.NewLineState |
                                       ctx->DriverFlags.NewLogicOp |
@@ -1436,6 +1446,12 @@ _mesa_PopAttrib(void)
                if (xform->DepthClamp != ctx->Transform.DepthClamp)
                   _mesa_set_enable(ctx, GL_DEPTH_CLAMP,
                                    ctx->Transform.DepthClamp);
+               if (xform->DepthClampNear != ctx->Transform.DepthClampNear)
+                  _mesa_set_enable(ctx, GL_DEPTH_CLAMP_NEAR_AMD,
+                                   ctx->Transform.DepthClampNear);
+               if (xform->DepthClampFar != ctx->Transform.DepthClampFar)
+                  _mesa_set_enable(ctx, GL_DEPTH_CLAMP_FAR_AMD,
+                                   ctx->Transform.DepthClampFar);
                if (ctx->Extensions.ARB_clip_control)
                   _mesa_ClipControl(xform->ClipOrigin, xform->ClipDepthMode);
             }
-- 
2.17.1