+ if (ctx->Extensions.ATI_separate_stencil) {
+ /* set both front and back state */
+ if (ctx->Stencil.ZFailFunc[0] == zfail &&
+ ctx->Stencil.ZFailFunc[1] == zfail &&
+ ctx->Stencil.ZPassFunc[0] == zpass &&
+ ctx->Stencil.ZPassFunc[1] == zpass &&
+ ctx->Stencil.FailFunc[0] == fail &&
+ ctx->Stencil.FailFunc[1] == fail)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ ctx->Stencil.ZFailFunc[0] = ctx->Stencil.ZFailFunc[1] = zfail;
+ ctx->Stencil.ZPassFunc[0] = ctx->Stencil.ZPassFunc[1] = zpass;
+ ctx->Stencil.FailFunc[0] = ctx->Stencil.FailFunc[1] = fail;
+ if (ctx->Driver.StencilOpSeparate) {
+ ctx->Driver.StencilOpSeparate(ctx, GL_FRONT_AND_BACK,
+ fail, zfail, zpass);
+ }
+ }
+ else {
+ /* only set active face state */
+ const GLint face = ctx->Stencil.ActiveFace;
+ if (ctx->Stencil.ZFailFunc[face] == zfail &&
+ ctx->Stencil.ZPassFunc[face] == zpass &&
+ ctx->Stencil.FailFunc[face] == fail)
+ return;
+ FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ ctx->Stencil.ZFailFunc[face] = zfail;
+ ctx->Stencil.ZPassFunc[face] = zpass;
+ ctx->Stencil.FailFunc[face] = fail;
+ if (ctx->Driver.StencilOpSeparate) {
+ ctx->Driver.StencilOpSeparate(ctx, face ? GL_BACK : GL_FRONT,
+ fail, zfail, zpass);
+ }
+ }
+}
+
+
+
+#if _HAVE_FULL_GL
+/* GL_EXT_stencil_two_side */
+void GLAPIENTRY
+_mesa_ActiveStencilFaceEXT(GLenum face)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (!ctx->Extensions.EXT_stencil_two_side) {
+ _mesa_error(ctx, GL_INVALID_OPERATION, "glActiveStencilFaceEXT");
+ return;
+ }
+
+ if (face == GL_FRONT || face == GL_BACK) {
+ FLUSH_VERTICES(ctx, _NEW_STENCIL);
+ ctx->Stencil.ActiveFace = (face == GL_FRONT) ? 0 : 1;
+ }
+ else {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glActiveStencilFaceEXT(face)");
+ }
+}
+#endif
+
+
+
+/**
+ * OpenGL 2.0 function.
+ * \todo Make StencilOp() call this function. And eventually remove the
+ * ctx->Driver.StencilOp function and use ctx->Driver.StencilOpSeparate
+ * instead.
+ */
+void GLAPIENTRY
+_mesa_StencilOpSeparate(GLenum face, GLenum fail, GLenum zfail, GLenum zpass)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(face)");
+ return;
+ }
+
+ switch (fail) {
+ case GL_KEEP:
+ case GL_ZERO:
+ case GL_REPLACE:
+ case GL_INCR:
+ case GL_DECR:
+ case GL_INVERT:
+ break;
+ case GL_INCR_WRAP_EXT:
+ case GL_DECR_WRAP_EXT:
+ if (ctx->Extensions.EXT_stencil_wrap) {
+ break;
+ }
+ /* FALL-THROUGH */
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(fail)");
+ return;
+ }
+ switch (zfail) {
+ case GL_KEEP:
+ case GL_ZERO:
+ case GL_REPLACE:
+ case GL_INCR:
+ case GL_DECR:
+ case GL_INVERT:
+ break;
+ case GL_INCR_WRAP_EXT:
+ case GL_DECR_WRAP_EXT:
+ if (ctx->Extensions.EXT_stencil_wrap) {
+ break;
+ }
+ /* FALL-THROUGH */
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(zfail)");
+ return;
+ }
+ switch (zpass) {
+ case GL_KEEP:
+ case GL_ZERO:
+ case GL_REPLACE:
+ case GL_INCR:
+ case GL_DECR:
+ case GL_INVERT:
+ break;
+ case GL_INCR_WRAP_EXT:
+ case GL_DECR_WRAP_EXT:
+ if (ctx->Extensions.EXT_stencil_wrap) {
+ break;
+ }
+ /* FALL-THROUGH */
+ default:
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilOpSeparate(zpass)");
+ return;
+ }
+
+ FLUSH_VERTICES(ctx, _NEW_STENCIL);
+
+ if (face != GL_BACK) {
+ ctx->Stencil.FailFunc[0] = fail;
+ ctx->Stencil.ZFailFunc[0] = zfail;
+ ctx->Stencil.ZPassFunc[0] = zpass;
+ }
+ if (face != GL_FRONT) {
+ ctx->Stencil.FailFunc[1] = fail;
+ ctx->Stencil.ZFailFunc[1] = zfail;
+ ctx->Stencil.ZPassFunc[1] = zpass;
+ }
+ if (ctx->Driver.StencilOpSeparate) {
+ ctx->Driver.StencilOpSeparate(ctx, face, fail, zfail, zpass);
+ }
+}
+
+
+/* OpenGL 2.0 */
+void GLAPIENTRY
+_mesa_StencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask)
+{
+ GET_CURRENT_CONTEXT(ctx);
+ const GLint stencilMax = (1 << ctx->DrawBuffer->Visual.stencilBits) - 1;
+ ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+ if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
+ _mesa_error(ctx, GL_INVALID_ENUM, "glStencilFuncSeparate(face)");