Step one in bringing back Yafray Render in Blender. Need someone else

to take over now, but I'm available for help. Main notes for completing:

- Yafray module uses old global R all over... is now a pointer handle.
  It can be temporally bypassed by straight copying, which I do now.

- I am not sure in what pixel format Yafray renders... Blender now only
  uses float buffers. In the code, marked with XXX I've added the
  rudimentary code for retrieving buffers.

- This integration will skip compositing when Yafray render is used.

source/blender/render/intern/source/pipeline.c

@@ -61,6 +61,9 @@
 
 #include "BSE_sequence.h"  /* <----------------- bad!!! */
 
+/* yafray: include for yafray export/render */
+#include "YafRay_Api.h"
+
 /* internal */
 #include "render_types.h"
 #include "renderpipeline.h"
@@ -71,6 +74,7 @@
 #include "shadbuf.h"
 #include "zbuf.h"
 
+
 /* render flow
 
 1) Initialize state
@@ -1588,6 +1592,37 @@ static void do_render_composite_fields_blur_3d(Render *re)
 	re->display_draw(re->result, NULL);
 }
 
+/* yafray: main yafray render/export call */
+static void yafrayRender(Render *re)
+{
+
+	re->result= new_render_result(re, &re->disprect, 0, RR_USEMEM);
+	
+	/* yafray uses this global still..., also for database stage? */
+	R= *re;
+	
+	// switch must be done before prepareScene()
+	if (!R.r.YFexportxml)
+		YAF_switchFile();
+	else
+		YAF_switchPlugin();
+	
+	printf("Starting scene conversion.\n");
+	RE_Database_FromScene(re, re->scene, 1);
+	printf("Scene conversion done.\n");
+	
+	/* yafray uses this global for exporting */
+	R= *re;
+	
+	YAF_exportScene();
+	RE_Database_Free(re);
+	
+}
+
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+
 /* main loop: doing sequence + fields + blur + 3d render + compositing */
 static void do_render_all_options(Render *re)
 {
@@ -1596,7 +1631,10 @@ static void do_render_all_options(Render *re)
 			do_render_seq(re->result, re->r.cfra);
 	}
 	else {
-		do_render_composite_fields_blur_3d(re);
+		if(re->r.renderer==R_YAFRAY)
+			yafrayRender(re);
+		else
+			do_render_composite_fields_blur_3d(re);
 	}
 }
 

source/blender/yafray/intern/export_File.cpp

@@ -289,6 +289,13 @@ void yafrayFileRender_t::displayImage()
 	unsigned int idlen = (unsigned int)header[0];
 	if (idlen) fseek(fp, idlen, SEEK_CUR);
 
+	/* XXX how to get the image from Blender and write to it. This call doesn't allow to change buffer rects */
+	RenderResult rres;
+	RE_GetResultImage(&R, &rres);
+	// rres.rectx, rres.recty is width/height
+	// rres.rectf is float buffer, scanlines starting in bottom
+	// rres.rectz is zbuffer, available when associated pass is set
+	
 	// read data directly into buffer, picture is upside down
 	for (unsigned short y=0;y<height;y++) {
 		unsigned char* bpt = NULL; //(unsigned char*)R.rectot + ((((height-1)-y)*width)<<2);

source/blender/yafray/intern/export_Plugin.cpp

@@ -274,8 +274,6 @@ void yafrayPluginRender_t::displayImage()
 	// although it is possible to load the image using blender,
 	// maybe it is best to just do a read here, for now the yafray output is always a raw tga anyway
 
-	// rectot already freed in initrender
-//	R.rectot = (unsigned int *)MEM_callocN(sizeof(int)*R.rectx*R.recty, "rectot");
 
 	FILE* fp = fopen(imgout.c_str(), "rb");
 	if (fp==NULL) {
@@ -292,6 +290,14 @@ void yafrayPluginRender_t::displayImage()
 	unsigned int idlen = (unsigned int)header[0];
 	if (idlen) fseek(fp, idlen, SEEK_CUR);
 
+	/* XXX how to get the image from Blender and write to it. This call doesn't allow to change buffer rects */
+	RenderResult rres;
+	RE_GetResultImage(&R, &rres);
+	// rres.rectx, rres.recty is width/height
+	// rres.rectf is float buffer, scanlines starting in bottom
+	// rres.rectz is zbuffer, available when associated pass is set
+	
+	
 	// read data directly into buffer, picture is upside down
 	for (unsigned short y=0;y<height;y++) {
 		unsigned char* bpt = NULL;//(unsigned char*)R.rectot + ((((height-1)-y)*width)<<2);
@@ -1948,6 +1954,7 @@ bool blenderYafrayOutput_t::putPixel(int x, int y, const yafray::color_t &c,
 	out++;
 	if (out==4096)
 	{
+		/* XXX second arg is rcti *rect, allows to indicate sub-rect in image to draw */
 		R.display_draw(R.result, NULL);
 		out = 0;
 	}