OpenGL: more work on fixed function lighting implementation as GLSL.

* Rename functions and move to own header.
* Add wrapper functions for glLight.
* Auto detect if we can use faster code for solid lighting.
* Various fixes for textured draw mode.

1 files changed, 89 insertions, 0 deletions

diff --git a/source/blender/gpu/GPU_simple_shader.h b/source/blender/gpu/GPU_simple_shader.h
new file mode 100644
index 00000000000..c8fb1f09b04
--- /dev/null
+++ b/source/blender/gpu/GPU_simple_shader.h
@@ -0,0 +1,89 @@
+/*
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * The Original Code is Copyright (C) 2005 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): Brecht Van Lommel.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file GPU_simple_shader.h
+ *  \ingroup gpu
+ */
+
+#ifndef __GPU_SIMPLE_SHADER_H__
+#define __GPU_SIMPLE_SHADER_H__
+
+#include "BLI_utildefines.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Fixed Function Shader */
+
+typedef enum GPUSimpleShaderOption {
+	GPU_SHADER_OVERRIDE_DIFFUSE = (1<<0),   /* replace diffuse with glcolor */
+	GPU_SHADER_LIGHTING = (1<<1),           /* use lighting */
+	GPU_SHADER_TWO_SIDED = (1<<2),          /* flip normals towards viewer */
+	GPU_SHADER_TEXTURE_2D = (1<<3),         /* use 2D texture to replace diffuse color */
+
+	GPU_SHADER_SOLID_LIGHTING = (1<<4),     /* use faster lighting (set automatically) */
+	GPU_SHADER_OPTIONS_NUM = 5,
+	GPU_SHADER_OPTION_COMBINATIONS = (1<<GPU_SHADER_OPTIONS_NUM)
+} GPUSimpleShaderOption;
+
+void GPU_simple_shaders_init(void);
+void GPU_simple_shaders_exit(void);
+
+void GPU_simple_shader_bind(int options);
+void GPU_simple_shader_unbind(void);
+
+void GPU_simple_shader_colors(const float diffuse[3], const float specular[3],
+	int shininess, float alpha);
+
+bool GPU_simple_shader_need_normals(void);
+
+/* Fixed Function Lighting */
+
+typedef struct GPULightData {
+	float position[4];
+	float diffuse[4];
+	float specular[4];
+
+	float constant_attenuation;
+	float linear_attenuation;
+	float quadratic_attenuation;
+
+	float spot_direction[3];
+	float spot_cutoff;
+	float spot_exponent;
+} GPULightData;
+
+void GPU_simple_shader_light_set(int light_num, GPULightData *light);
+void GPU_simple_shader_light_set_viewer(bool local);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+