X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fbackends%2Fopengl%2Ftexture3d_backend.cpp;fp=source%2Fbackends%2Fopengl%2Ftexture3d_backend.cpp;h=6826993ae6d9c37c414d5e6ff5aa50f1c9b7ff09;hb=160e9eea29bd10034733d59507fa1bcca36be401;hp=0000000000000000000000000000000000000000;hpb=93448d16e72e38afbaecbccf6fdedd46d6a82a73;p=libs%2Fgl.git

diff --git a/source/backends/opengl/texture3d_backend.cpp b/source/backends/opengl/texture3d_backend.cpp
new file mode 100644
index 00000000..6826993a
--- /dev/null
+++ b/source/backends/opengl/texture3d_backend.cpp
@@ -0,0 +1,75 @@
+#include <msp/gl/extensions/arb_direct_state_access.h>
+#include <msp/gl/extensions/arb_texture_storage.h>
+#include <msp/gl/extensions/ext_texture3d.h>
+#include <msp/gl/extensions/ext_texture_array.h>
+#include "gl.h"
+#include "texture3d.h"
+#include "texture3d_backend.h"
+
+namespace Msp {
+namespace GL {
+
+OpenGLTexture3D::OpenGLTexture3D():
+	Texture(GL_TEXTURE_3D)
+{
+	static Require _req(EXT_texture3D);
+}
+
+OpenGLTexture3D::OpenGLTexture3D(unsigned t):
+	Texture(t)
+{ }
+
+void OpenGLTexture3D::allocate()
+{
+	unsigned width = static_cast<const Texture3D *>(this)->width;
+	unsigned height = static_cast<const Texture3D *>(this)->height;
+	unsigned depth = static_cast<const Texture3D *>(this)->depth;
+	unsigned levels = static_cast<const Texture3D *>(this)->levels;
+
+	GLenum gl_fmt = get_gl_pixelformat(storage_fmt);
+	if(ARB_texture_storage)
+	{
+		if(ARB_direct_state_access)
+			glTextureStorage3D(id, levels, gl_fmt, width, height, depth);
+		else
+		{
+			bind_scratch();
+			glTexStorage3D(target, levels, gl_fmt, width, height, depth);
+		}
+	}
+	else
+	{
+		bind_scratch();
+		GLenum comp = get_gl_components(get_components(storage_fmt));
+		GLenum type = get_gl_type(get_component_type(storage_fmt));
+		for(unsigned i=0; i<levels; ++i)
+		{
+			auto lv_size = static_cast<const Texture3D *>(this)->get_level_size(i);
+			glTexImage3D(target, i, gl_fmt, lv_size.x, lv_size.y, lv_size.z, 0, comp, type, 0);
+		}
+		glTexParameteri(target, GL_TEXTURE_MAX_LEVEL, levels-1);
+	}
+
+	apply_swizzle();
+}
+
+void OpenGLTexture3D::sub_image(unsigned level, int x, int y, int z, unsigned wd, unsigned ht, unsigned dp, const void *data)
+{
+	GLenum comp = get_gl_components(get_components(storage_fmt));
+	GLenum type = get_gl_type(get_component_type(storage_fmt));
+	if(ARB_direct_state_access)
+		glTextureSubImage3D(id, level, x, y, z, wd, ht, dp, comp, type, data);
+	else
+	{
+		bind_scratch();
+		glTexSubImage3D(target, level, x, y, z, wd, ht, dp, comp, type, data);
+	}
+}
+
+bool OpenGLTexture3D::is_array() const
+{
+	return target==GL_TEXTURE_2D_ARRAY;
+}
+
+} // namespace GL
+} // namespace Msp