1 files changed, 105 insertions, 0 deletions
diff --git a/source/blender/gpu/intern/gpu_uniformbuffer.c b/source/blender/gpu/intern/gpu_uniformbuffer.c
new file mode 100644
index 00000000000..76aa1a8226f
--- /dev/null
+++ b/source/blender/gpu/intern/gpu_uniformbuffer.c
@@ -0,0 +1,105 @@
+/*
+ * ***** 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): Clement Foucault.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+/** \file gpu_uniformbuffer.c
+ *  \ingroup gpu
+ */
+
+#include "MEM_guardedalloc.h"
+
+#include "BLI_blenlib.h"
+
+#include "GPU_extensions.h"
+#include "GPU_glew.h"
+#include "GPU_uniformbuffer.h"
+
+struct GPUUniformBuffer {
+	int size;           /* in bytes */
+	GLuint bindcode;    /* opengl identifier for UBO */
+	int bindpoint;      /* current binding point */
+};
+
+GPUUniformBuffer *GPU_uniformbuffer_create(int size, const void *data, char err_out[256])
+{
+	GPUUniformBuffer *ubo = MEM_callocN(sizeof(GPUUniformBuffer), "GPUUniformBuffer");
+	ubo->size = size;
+
+	/* Generate Buffer object */
+	glGenBuffers(1, &ubo->bindcode);
+	
+	if (!ubo->bindcode) {
+		if (err_out)
+			BLI_snprintf(err_out, 256, "GPUUniformBuffer: UBO create failed");
+		GPU_uniformbuffer_free(ubo);
+		return NULL;
+	}
+
+	if (ubo->size > GPU_max_ubo_size()) {
+		if (err_out)
+			BLI_snprintf(err_out, 256, "GPUUniformBuffer: UBO too big");
+		GPU_uniformbuffer_free(ubo);
+		return NULL;
+	}
+
+	glBindBuffer(GL_UNIFORM_BUFFER, ubo->bindcode);
+	glBufferData(GL_UNIFORM_BUFFER, ubo->size, data, GL_DYNAMIC_DRAW);
+	glBindBuffer(GL_UNIFORM_BUFFER, 0);
+
+	return ubo;
+}
+
+void GPU_uniformbuffer_free(GPUUniformBuffer *ubo)
+{
+	glDeleteBuffers(1, &ubo->bindcode);
+	MEM_freeN(ubo);
+}
+
+void GPU_uniformbuffer_update(GPUUniformBuffer *ubo, const void *data)
+{
+	glBindBuffer(GL_UNIFORM_BUFFER, ubo->bindcode);
+	glBufferSubData(GL_UNIFORM_BUFFER, 0, ubo->size, data);
+	glBindBuffer(GL_UNIFORM_BUFFER, 0);
+}
+
+void GPU_uniformbuffer_bind(GPUUniformBuffer *ubo, int number)
+{
+	if (number >= GPU_max_ubo_binds()) {
+		fprintf(stderr, "Not enough UBO slots.\n");
+		return;
+	}
+
+	if (ubo->bindcode != 0) {
+		glBindBufferBase(GL_UNIFORM_BUFFER, number, ubo->bindcode);
+	}
+
+	ubo->bindpoint = number;
+}
+
+int GPU_uniformbuffer_bindpoint(GPUUniformBuffer *ubo)
+{
+	return ubo->bindpoint;
+}
+\ No newline at end of file