Cycles: Support builtin images for OSL shading backend

This means packed images and movies are now supported when using OSL
backend for material shading.

Uses special file name to distinguish whether image is builtin or not.
This part might become a bit smarted or optimized a bit, but it's good
enough with this implementation already.

2 files changed, 67 insertions, 12 deletions

diff --git a/intern/cycles/kernel/osl/osl_services.cpp b/intern/cycles/kernel/osl/osl_services.cpp
index 8fe48b9b38c..6a59a381f48 100644
--- a/intern/cycles/kernel/osl/osl_services.cpp
+++ b/intern/cycles/kernel/osl/osl_services.cpp
@@ -871,14 +871,30 @@ bool OSLRenderServices::texture(ustring filename, TextureOpt &options,
 		return true;
 	}
 #endif
+	bool status;
 
-	OSLThreadData *tdata = kg->osl_tdata;
-	OIIO::TextureSystem::Perthread *thread_info = tdata->oiio_thread_info;
+	if(filename[0] == '@' && filename.find('.') == -1) {
+        int slot = atoi(filename.c_str() + 1);
+		float4 rgba = kernel_tex_image_interp(slot, s, 1.0f - t);
 
-	OIIO::TextureSystem::TextureHandle *th = ts->get_texture_handle(filename, thread_info);
+		result[0] = rgba[0];
+		if(options.nchannels > 1)
+			result[1] = rgba[1];
+		if(options.nchannels > 2)
+			result[2] = rgba[2];
+		if(options.nchannels > 3)
+			result[3] = rgba[3];
+		status = true;
+	}
+	else {
+		OSLThreadData *tdata = kg->osl_tdata;
+		OIIO::TextureSystem::Perthread *thread_info = tdata->oiio_thread_info;
+
+		OIIO::TextureSystem::TextureHandle *th = ts->get_texture_handle(filename, thread_info);
 
-	bool status = ts->texture(th, thread_info,
-	                          options, s, t, dsdx, dtdx, dsdy, dtdy, result);
+		status = ts->texture(th, thread_info,
+		                     options, s, t, dsdx, dtdx, dsdy, dtdy, result);
+	}
 
 	if(!status) {
 		if(options.nchannels == 3 || options.nchannels == 4) {
diff --git a/intern/cycles/render/nodes.cpp b/intern/cycles/render/nodes.cpp
index 1a1667ff1b3..2d7f9ea848b 100644
--- a/intern/cycles/render/nodes.cpp
+++ b/intern/cycles/render/nodes.cpp
@@ -305,10 +305,32 @@ void ImageTextureNode::compile(OSLCompiler& compiler)
 
 	tex_mapping.compile(compiler);
 
-	if(is_float == -1)
-		is_float = (int)image_manager->is_float_image(filename, NULL, is_linear);
+	image_manager = compiler.image_manager;
+	if(is_float == -1) {
+		if(builtin_data == NULL) {
+			is_float = (int)image_manager->is_float_image(filename, NULL, is_linear);
+		}
+		else {
+			bool is_float_bool;
+			slot = image_manager->add_image(filename, builtin_data,
+			                                animated, is_float_bool, is_linear,
+			                                interpolation, use_alpha);
+			is_float = (int)is_float_bool;
+		}
+	}
 
-	compiler.parameter("filename", filename.c_str());
+	if(slot == -1) {
+		compiler.parameter("filename", filename.c_str());
+	}
+	else {
+		/* TODO(sergey): It's not so simple to pass custom attribute
+		 * to the texture() function in order to make builtin images
+		 * support more clear. So we use special file name which is
+		 * "@<slot_number>" and check whether file name matches this
+		 * mask in the OSLRenderServices::texture().
+		 */
+		compiler.parameter("filename", string_printf("@%d", slot).c_str());
+	}
 	if(is_linear || color_space != "Color")
 		compiler.parameter("color_space", "Linear");
 	else
@@ -459,10 +481,28 @@ void EnvironmentTextureNode::compile(OSLCompiler& compiler)
 
 	tex_mapping.compile(compiler);
 
-	if(is_float == -1)
-		is_float = (int)image_manager->is_float_image(filename, NULL, is_linear);
+	/* See comments in ImageTextureNode::compile about support
+	 * of builtin images.
+	 */
+	if(is_float == -1) {
+		if(builtin_data == NULL) {
+			is_float = (int)image_manager->is_float_image(filename, NULL, is_linear);
+		}
+		else {
+			bool is_float_bool;
+			slot = image_manager->add_image(filename, builtin_data,
+			                                animated, is_float_bool, is_linear,
+			                                INTERPOLATION_LINEAR, use_alpha);
+			is_float = (int)is_float_bool;
+		}
+	}
 
-	compiler.parameter("filename", filename.c_str());
+	if(slot == -1) {
+		compiler.parameter("filename", filename.c_str());
+	}
+	else {
+		compiler.parameter("filename", string_printf("@%d", slot).c_str());
+	}
 	compiler.parameter("projection", projection);
 	if(is_linear || color_space != "Color")
 		compiler.parameter("color_space", "Linear");
@@ -4121,4 +4161,3 @@ void TangentNode::compile(OSLCompiler& compiler)
 }
 
 CCL_NAMESPACE_END
-