From d67cc37dee7e0d60af2cd172fa135962a6dc3ce5 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jos=C3=A9=20Fonseca?= <jfonseca@vmware.com>
Date: Thu, 12 Sep 2013 17:27:04 +0100
Subject: [PATCH] glretrace: Dump depth buffers as floating point images.

---
 retrace/glstate_images.cpp | 25 ++++++++++---------------
 retrace/json.cpp           |  8 +++++++-
 2 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/retrace/glstate_images.cpp b/retrace/glstate_images.cpp
index 6efc0a6..37c0ae1 100644
--- a/retrace/glstate_images.cpp
+++ b/retrace/glstate_images.cpp
@@ -59,11 +59,6 @@ OSStatus CGSGetSurfaceBounds(CGSConnectionID, CGWindowID, CGSSurfaceID, CGRect *
 #endif /* __APPLE__ */
 
 
-/* Change thi to one to force interpreting depth buffers as RGBA, which enables
- * visualizing full dynamic range, until we can transmit HDR images to the GUI */
-#define DEPTH_AS_RGBA 0
-
-
 namespace glstate {
 
 
@@ -935,15 +930,15 @@ getDrawBufferImage() {
     }
 
     GLenum type = GL_UNSIGNED_BYTE;
+    image::ChannelType channelType = image::TYPE_UNORM8;
 
-#if DEPTH_AS_RGBA
     if (format == GL_DEPTH_COMPONENT) {
-        type = GL_UNSIGNED_INT;
-        channels = 4;
+        type = GL_FLOAT;
+        channels = 1;
+        channelType = image::TYPE_FLOAT;
     }
-#endif
 
-    image::Image *image = new image::Image(desc.width, desc.height, channels, true);
+    image::Image *image = new image::Image(desc.width, desc.height, channels, true, channelType);
     if (!image) {
         return NULL;
     }
@@ -1002,15 +997,15 @@ dumpReadBufferImage(JSONWriter &json, GLint width, GLint height, GLenum format,
     Context context;
 
     GLenum type = GL_UNSIGNED_BYTE;
+    image::ChannelType channelType = image::TYPE_UNORM8;
 
-#if DEPTH_AS_RGBA
     if (format == GL_DEPTH_COMPONENT) {
-        type = GL_UNSIGNED_INT;
-        channels = 4;
+        type = GL_FLOAT;
+        channels = 1;
+        channelType = image::TYPE_FLOAT;
     }
-#endif
 
-    image::Image *image = new image::Image(width, height, channels, true);
+    image::Image *image = new image::Image(width, height, channels, true, channelType);
 
     while (glGetError() != GL_NO_ERROR) {}
 
diff --git a/retrace/json.cpp b/retrace/json.cpp
index 53a61a3..850e37f 100644
--- a/retrace/json.cpp
+++ b/retrace/json.cpp
@@ -322,7 +322,13 @@ JSONWriter::writeImage(image::Image *image, const char *format, unsigned depth)
 
     beginMember("__data__");
     std::stringstream ss;
-    image->writePNG(ss);
+
+    if (image->channelType == image::TYPE_UNORM8) {
+        image->writePNG(ss);
+    } else {
+        image->writePNM(ss);
+    }
+
     const std::string & s = ss.str();
     writeBase64(s.data(), s.size());
     endMember(); // __data__
-- 
2.43.0