From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 19 Jul 2008 11:19:01 +0000 (+0000)
Subject: Add blending and clipping support
X-Git-Tag: 0.9~4
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=1bff68e595a66f3755743a7ee0f974eb876f3520;p=libs%2Fgl.git

Add blending and clipping support
Add name stack management functions
---

diff --git a/source/blend.cpp b/source/blend.cpp
new file mode 100644
index 00000000..c9407c21
--- /dev/null
+++ b/source/blend.cpp
@@ -0,0 +1,25 @@
+/* $Id$
+
+This file is part of libmspgl
+Copyright © 2008  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#define GL_GLEXT_PROTOTYPES
+#include "blend.h"
+
+namespace Msp {
+namespace GL {
+
+void blend_equation(BlendEquation eq)
+{
+	glBlendEquation(eq);
+}
+
+void blend_func(BlendFactor src, BlendFactor dst)
+{
+	glBlendFunc(src, dst);
+}
+
+} // namespace GL
+} // namespace Msp
diff --git a/source/blend.h b/source/blend.h
new file mode 100644
index 00000000..37fc56e1
--- /dev/null
+++ b/source/blend.h
@@ -0,0 +1,49 @@
+/* $Id$
+
+This file is part of libmspgl
+Copyright © 2008  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#ifndef MSP_GL_BLEND_H_
+#define MSP_GL_BLEND_H_
+
+#include "gl.h"
+
+namespace Msp {
+namespace GL {
+
+enum BlendEquation
+{
+	ADD              = GL_FUNC_ADD,
+	SUBTRACT         = GL_FUNC_SUBTRACT,
+	REVERSE_SUBTRACT = GL_FUNC_REVERSE_SUBTRACT,
+	MIN              = GL_MIN,
+	MAX              = GL_MAX
+};
+
+enum BlendFactor
+{
+	ZERO = GL_ZERO,
+	ONE = GL_ONE,
+	SRC_COLOR = GL_SRC_COLOR,
+	ONE_MINUS_SRC_COLOR = GL_ONE_MINUS_SRC_COLOR,
+	SRC_ALPHA = GL_SRC_ALPHA,
+	ONE_MINUS_SRC_ALPHA = GL_ONE_MINUS_SRC_ALPHA,
+	DST_COLOR = GL_DST_COLOR,
+	ONE_MINUS_DST_COLOR = GL_ONE_MINUS_DST_COLOR,
+	DST_ALPHA = GL_DST_ALPHA,
+	ONE_MINUS_DST_ALPHA = GL_ONE_MINUS_DST_ALPHA,
+	CONSTANT_COLOR = GL_CONSTANT_COLOR,
+	ONE_MINUS_CONSTANT_COLOR = GL_ONE_MINUS_CONSTANT_COLOR,
+	CONSTANT_ALPHA = GL_CONSTANT_ALPHA,
+	ONE_MINUS_CONSTANT_ALPHA = GL_ONE_MINUS_CONSTANT_ALPHA
+};
+
+void blend_equation(BlendEquation eq);
+void blend_func(BlendFactor src, BlendFactor dst);
+
+} // namespace GL
+} // namespace Msp
+
+#endif
diff --git a/source/clip.cpp b/source/clip.cpp
new file mode 100644
index 00000000..ca1b7420
--- /dev/null
+++ b/source/clip.cpp
@@ -0,0 +1,34 @@
+/* $Id$
+
+This file is part of libmspgl
+Copyright © 2008  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#include "clip.h"
+#include "gl.h"
+
+namespace Msp {
+namespace GL {
+
+ClipPlane::ClipPlane(double a, double b, double c, double d)
+{
+	eq[0]=a;
+	eq[1]=b;
+	eq[2]=c;
+	eq[3]=d;
+}
+
+void ClipPlane::apply_to(unsigned n)
+{
+	glClipPlane(GL_CLIP_PLANE0+n, eq);
+	glEnable(GL_CLIP_PLANE0+n);
+}
+
+void ClipPlane::disable(unsigned n)
+{
+	glDisable(GL_CLIP_PLANE0+n);
+}
+
+} // namespace GL
+} // namespace Msp
diff --git a/source/clip.h b/source/clip.h
new file mode 100644
index 00000000..bd8b1c57
--- /dev/null
+++ b/source/clip.h
@@ -0,0 +1,28 @@
+/* $Id$
+
+This file is part of libmspgl
+Copyright © 2008  Mikko Rasa, Mikkosoft Productions
+Distributed under the LGPL
+*/
+
+#ifndef MSP_GL_CLIP_H_
+#define MSP_GL_CLIP_H_
+
+namespace Msp {
+namespace GL {
+
+class ClipPlane
+{
+public:
+	double eq[4];
+
+	ClipPlane(double, double, double, double);
+	void apply_to(unsigned);
+
+	static void disable(unsigned);
+};
+
+} // namespace GL
+} // namespace Msp
+
+#endif
diff --git a/source/select.cpp b/source/select.cpp
index e7037cbf..51fe0b60 100644
--- a/source/select.cpp
+++ b/source/select.cpp
@@ -28,6 +28,26 @@ void select_buffer(vector<SelectRecord> &buf)
 	select_buf=&buf;
 }
 
+void init_names()
+{
+	glInitNames();
+}
+
+void push_name(uint n)
+{
+	glPushName(n);
+}
+
+void pop_name()
+{
+	glPopName();
+}
+
+void load_name(uint n)
+{
+	glLoadName(n);
+}
+
 void parse_select_records(const uint *buf, uint count, vector<SelectRecord> &tbuf)
 {
 	uint i=0;
diff --git a/source/select.h b/source/select.h
index 3964b894..680334f4 100644
--- a/source/select.h
+++ b/source/select.h
@@ -22,6 +22,11 @@ struct SelectRecord
 };
 
 void select_buffer(std::vector<SelectRecord> &);
+void init_names();
+void push_name(uint);
+void pop_name();
+void load_name(uint);
+
 void parse_select_records(const uint *buf, uint, std::vector<SelectRecord> &);
 
 void _parse_internal_select_records(uint);