X-Git-Url: http://git.tdb.fi/?p=libs%2Fgl.git;a=blobdiff_plain;f=source%2Ftexture.cpp;h=1d2ece8074410ded753c621f4c4dd43418e2694d;hp=581ec705690d556320bc412577a7ad8e5f4d0adb;hb=a993091fbb8fdb76a1d02be9de59529c14b59cf0;hpb=08e19bc2b4eba572bc7699378cf55cd8772ac67e

diff --git a/source/texture.cpp b/source/texture.cpp
index 581ec705..1d2ece80 100644
--- a/source/texture.cpp
+++ b/source/texture.cpp
@@ -1,5 +1,6 @@
 #include <msp/gl/extensions/arb_direct_state_access.h>
 #include <msp/gl/extensions/arb_shadow.h>
+#include <msp/gl/extensions/arb_texture_swizzle.h>
 #include <msp/gl/extensions/ext_framebuffer_object.h>
 #include <msp/gl/extensions/ext_texture3d.h>
 #include <msp/gl/extensions/ext_texture_filter_anisotropic.h>
@@ -49,9 +50,17 @@ void operator>>(const LexicalConverter &c, TextureWrap &tw)
 }
 
 
+int Texture::swizzle_orders[] =
+{
+	GL_RED, GL_GREEN, GL_BLUE, GL_ALPHA,
+	GL_RED, GL_RED, GL_RED, GL_ONE,
+	GL_RED, GL_RED, GL_RED, GL_GREEN
+};
+
 Texture::Texture(GLenum t, ResourceManager *m):
 	id(0),
 	target(t),
+	ifmt(RGB),
 	min_filter(NEAREST_MIPMAP_LINEAR),
 	mag_filter(LINEAR),
 	wrap_s(REPEAT),
@@ -84,6 +93,41 @@ DataType Texture::get_alloc_type(PixelFormat fmt)
 	return (get_base_pixelformat(fmt)==DEPTH_COMPONENT ? UNSIGNED_SHORT : UNSIGNED_BYTE);
 }
 
+void Texture::set_internal_format(PixelFormat fmt)
+{
+	if(!get_component_size(fmt) && OES_required_internalformat)
+		fmt = get_default_sized_pixelformat(fmt);
+
+	FormatSwizzle swiz = NO_SWIZZLE;
+	if(ARB_texture_rg && ARB_texture_swizzle)
+	{
+		if(fmt==LUMINANCE8 || fmt==SLUMINANCE8)
+		{
+			fmt = R8;
+			swiz = R_TO_LUMINANCE;
+		}
+		else if(fmt==LUMINANCE8_ALPHA8 || fmt==SLUMINANCE8_ALPHA8)
+		{
+			fmt = RG8;
+			swiz = RG_TO_LUMINANCE_ALPHA;
+		}
+	}
+
+	require_pixelformat(fmt);
+	ifmt = fmt;
+	swizzle = swiz;
+	if(swizzle)
+		update_parameter(FORMAT_SWIZZLE);
+}
+
+PixelFormat Texture::get_upload_format(PixelFormat fmt) const
+{
+	if(fmt==LUMINANCE || fmt==LUMINANCE_ALPHA)
+		return get_base_pixelformat(ifmt);
+	else
+		return fmt;
+}
+
 void Texture::update_parameter(int mask) const
 {
 	if(!ARB_direct_state_access && TexUnit::current().get_texture()!=this)
@@ -116,6 +160,23 @@ void Texture::update_parameter(int mask) const
 		set_parameter_i(GL_TEXTURE_COMPARE_MODE, (compare ? GL_COMPARE_R_TO_TEXTURE : GL_NONE));
 	if(mask&COMPARE_FUNC)
 		set_parameter_i(GL_TEXTURE_COMPARE_FUNC, cmp_func);
+	if(mask&FORMAT_SWIZZLE)
+	{
+		if(get_gl_api()==OPENGL_ES2)
+		{
+			set_parameter_i(GL_TEXTURE_SWIZZLE_R, swizzle_orders[swizzle*4]);
+			set_parameter_i(GL_TEXTURE_SWIZZLE_G, swizzle_orders[swizzle*4+1]);
+			set_parameter_i(GL_TEXTURE_SWIZZLE_B, swizzle_orders[swizzle*4+2]);
+			set_parameter_i(GL_TEXTURE_SWIZZLE_A, swizzle_orders[swizzle*4+3]);
+		}
+		else
+		{
+			if(ARB_direct_state_access)
+				glTextureParameteriv(id, GL_TEXTURE_SWIZZLE_RGBA, swizzle_orders+swizzle*4);
+			else
+				glTexParameteriv(target, GL_TEXTURE_SWIZZLE_RGBA, swizzle_orders+swizzle*4);
+		}
+	}
 }
 
 void Texture::set_parameter_i(GLenum param, int value) const
@@ -189,6 +250,11 @@ void Texture::set_wrap_r(TextureWrap w)
 	update_parameter(WRAP_R);
 }
 
+bool Texture::can_generate_mipmap()
+{
+	return (EXT_framebuffer_object || SGIS_generate_mipmap);
+}
+
 void Texture::set_generate_mipmap(bool gm)
 {
 	if(gm && !EXT_framebuffer_object)