mesa: Implement ARB_clip_control.

Implement the mesa parts of ARB_clip_control.
So far no driver enables this.

v3:
Restrict getting clip control state to the availability
of ARB_clip_control.
Move to transformation state.
Handle clip control state with the GL_TRANSFORM_BIT.
Move _FrontBit update into state.c.

Reviewed-by: Brian Paul <[email protected]>
Signed-off-by: Mathias Froehlich <[email protected]>

1 files changed, 26 insertions, 0 deletions

diff --git a/src/mesa/main/dlist.c b/src/mesa/main/dlist.c
index 5c7160d0540..4b7b0604bb2 100644
--- a/src/mesa/main/dlist.c
+++ b/src/mesa/main/dlist.c
@@ -398,6 +398,9 @@ typedef enum
    OPCODE_PROGRAM_UNIFORM_MATRIX34F,
    OPCODE_PROGRAM_UNIFORM_MATRIX43F,
 
+   /* GL_ARB_clip_control */
+   OPCODE_CLIP_CONTROL,
+
    /* GL_ARB_color_buffer_float */
    OPCODE_CLAMP_COLOR,
 
@@ -7208,6 +7211,22 @@ save_ProgramUniformMatrix4fv(GLuint program, GLint location, GLsizei count,
 }
 
 static void GLAPIENTRY
+save_ClipControl(GLenum origin, GLenum depth)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   Node *n;
+   ASSERT_OUTSIDE_SAVE_BEGIN_END_AND_FLUSH(ctx);
+   n = alloc_instruction(ctx, OPCODE_CLIP_CONTROL, 2);
+   if (n) {
+      n[1].e = origin;
+      n[2].e = depth;
+   }
+   if (ctx->ExecuteFlag) {
+      CALL_ClipControl(ctx->Exec, (origin, depth));
+   }
+}
+
+static void GLAPIENTRY
 save_ClampColorARB(GLenum target, GLenum clamp)
 {
    GET_CURRENT_CONTEXT(ctx);
@@ -8617,6 +8636,10 @@ execute_list(struct gl_context *ctx, GLuint list)
                                           get_pointer(&n[5])));
             break;
 
+         case OPCODE_CLIP_CONTROL:
+            CALL_ClipControl(ctx->Exec, (n[1].e, n[2].e));
+            break;
+
          case OPCODE_CLAMP_COLOR:
             CALL_ClampColor(ctx->Exec, (n[1].e, n[2].e));
             break;
@@ -9551,6 +9574,9 @@ _mesa_initialize_save_table(const struct gl_context *ctx)
    SET_TexParameterIiv(table, save_TexParameterIiv);
    SET_TexParameterIuiv(table, save_TexParameterIuiv);
 
+   /* GL_ARB_clip_control */
+   SET_ClipControl(table, save_ClipControl);
+
    /* GL_ARB_color_buffer_float */
    SET_ClampColor(table, save_ClampColorARB);