From 2702c90d7a39fca2a3319c5e915fd290cb31fc70 Mon Sep 17 00:00:00 2001
From: Radosław Kujawa <radoslaw.kujawa@c0ff33.net>
Date: Fri, 17 Jul 2026 14:54:32 +0200
Subject: Initial import.

---
 src/mesa/main/accum.c | 97 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 src/mesa/main/accum.c

(limited to 'src/mesa/main/accum.c')

diff --git a/src/mesa/main/accum.c b/src/mesa/main/accum.c
new file mode 100644
index 0000000..315bd33
--- /dev/null
+++ b/src/mesa/main/accum.c
@@ -0,0 +1,97 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  5.1
+ *
+ * Copyright (C) 1999-2003  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "glheader.h"
+#include "accum.h"
+#include "context.h"
+#include "imports.h"
+#include "macros.h"
+#include "state.h"
+#include "mtypes.h"
+
+
+void GLAPIENTRY
+_mesa_ClearAccum( GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha )
+{
+   GLfloat tmp[4];
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   tmp[0] = CLAMP( red,   -1.0F, 1.0F );
+   tmp[1] = CLAMP( green, -1.0F, 1.0F );
+   tmp[2] = CLAMP( blue,  -1.0F, 1.0F );
+   tmp[3] = CLAMP( alpha, -1.0F, 1.0F );
+
+   if (TEST_EQ_4V(tmp, ctx->Accum.ClearColor))
+      return;
+
+   FLUSH_VERTICES(ctx, _NEW_ACCUM);
+   COPY_4FV( ctx->Accum.ClearColor, tmp );
+}
+
+
+void GLAPIENTRY
+_mesa_Accum( GLenum op, GLfloat value )
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint xpos, ypos, width, height;
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (ctx->Visual.accumRedBits == 0 || ctx->DrawBuffer != ctx->ReadBuffer) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glAccum");
+      return;
+   }
+
+   if (ctx->NewState)
+      _mesa_update_state( ctx );
+
+   if (ctx->RenderMode != GL_RENDER) {
+      /* no-op */
+      return;
+   }
+
+   /* Determine region to operate upon. */
+   if (ctx->Scissor.Enabled) {
+      xpos = ctx->Scissor.X;
+      ypos = ctx->Scissor.Y;
+      width = ctx->Scissor.Width;
+      height = ctx->Scissor.Height;
+   }
+   else {
+      /* whole window */
+      xpos = 0;
+      ypos = 0;
+      width = ctx->DrawBuffer->Width;
+      height = ctx->DrawBuffer->Height;
+   }
+
+   ctx->Driver.Accum( ctx, op, value, xpos, ypos, width, height );
+}
+
+void 
+_mesa_init_accum( GLcontext *ctx )
+{
+   /* Accumulate buffer group */
+   ASSIGN_4V( ctx->Accum.ClearColor, 0.0, 0.0, 0.0, 0.0 );
+}
-- 
cgit