1 files changed, 62 insertions, 0 deletions
diff --git a/src/renderergl2/tr_backend.c b/src/renderergl2/tr_backend.c
index ad43e5b2..4a29c966 100644
--- a/src/renderergl2/tr_backend.c
+++ b/src/renderergl2/tr_backend.c
@@ -1738,6 +1738,65 @@ const void *RB_PostProcess(const void *data)
 	return (const void *)(cmd + 1);
 }
 
+// FIXME: put this function declaration elsewhere
+void R_SaveDDS(const char *filename, byte *pic, int width, int height, int depth);
+
+/*
+=============
+RB_ExportCubemaps
+
+=============
+*/
+const void *RB_ExportCubemaps(const void *data)
+{
+	const exportCubemapsCommand_t *cmd = data;
+
+	// finish any 2D drawing if needed
+	if (tess.numIndexes)
+		RB_EndSurface();
+
+	if (!glRefConfig.framebufferObject || !tr.world || tr.numCubemaps == 0)
+	{
+		// do nothing
+		ri.Printf(PRINT_ALL, "Nothing to export!\n");
+		return (const void *)(cmd + 1);
+	}
+
+	if (cmd)
+	{
+		FBO_t *oldFbo = glState.currentFBO;
+		int sideSize = CUBE_MAP_SIZE * CUBE_MAP_SIZE * 4;
+		byte *cubemapPixels = ri.Malloc(sideSize * 6);
+		int i, j;
+
+		FBO_Bind(tr.renderCubeFbo);
+
+		for (i = 0; i < tr.numCubemaps; i++)
+		{
+			char filename[MAX_QPATH];
+			cubemap_t *cubemap = &tr.cubemaps[i];
+			char *p = cubemapPixels;
+
+			for (j = 0; j < 6; j++)
+			{
+				qglFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, GL_TEXTURE_CUBE_MAP_POSITIVE_X + j, cubemap->image->texnum, 0);
+				qglReadPixels(0, 0, CUBE_MAP_SIZE, CUBE_MAP_SIZE, GL_RGBA, GL_UNSIGNED_BYTE, p);
+				p += sideSize;
+			}
+
+			Com_sprintf(filename, MAX_QPATH, "cubemaps/%s/%03d.dds", tr.world->baseName, i);
+			R_SaveDDS(filename, cubemapPixels, CUBE_MAP_SIZE, CUBE_MAP_SIZE, 6);
+			ri.Printf(PRINT_ALL, "Saved cubemap %d as %s\n", i, filename);
+		}
+
+		FBO_Bind(oldFbo);
+
+		ri.Free(cubemapPixels);
+	}
+
+	return (const void *)(cmd + 1);
+}
+
 
 /*
 ====================
@@ -1786,6 +1845,9 @@ void RB_ExecuteRenderCommands( const void *data ) {
 		case RC_POSTPROCESS:
 			data = RB_PostProcess(data);
 			break;
+		case RC_EXPORT_CUBEMAPS:
+			data = RB_ExportCubemaps(data);
+			break;
 		case RC_END_OF_LIST:
 		default:
 			// finish any 2D drawing if needed