# HG changeset patch
# User Sebastien Jodogne <s.jodogne@gmail.com>
# Date 1674380902 -3600
# Node ID 23b0a42eea8577846b917b89d34ae815408f09ba
# Parent  d10bab7cc3969af954345ebdf0e3df51a802ac46
added support for floating-point images in OpenGLTexture

diff -r d10bab7cc396 -r 23b0a42eea85 OrthancStone/Sources/OpenGL/OpenGLTexture.cpp
--- a/OrthancStone/Sources/OpenGL/OpenGLTexture.cpp	Sat Jan 21 16:48:56 2023 +0100
+++ b/OrthancStone/Sources/OpenGL/OpenGLTexture.cpp	Sun Jan 22 10:48:22 2023 +0100
@@ -92,7 +92,7 @@
         if (image.GetPitch() != image.GetBytesPerPixel() * image.GetWidth())
         {
           throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented,
-            "Unsupported non-zero padding");
+            "Pitch is not the same as the row size");
         }
 
         // Bind it
@@ -121,6 +121,12 @@
           pixelType = GL_UNSIGNED_BYTE;
           break;
 
+        case Orthanc::PixelFormat_Float32:
+          sourceFormat = GL_RED;
+          internalFormat = GL_R32F; // Don't use "GL_RED" here, as it clamps to [0,1]
+          pixelType = GL_FLOAT;
+          break;
+
         default:
           throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented,
             "No support for this format in OpenGL textures: " +
@@ -160,6 +166,7 @@
       }
 
       std::unique_ptr<Orthanc::ImageAccessor> target(new Orthanc::Image(format, width_, height_, true));
+      assert(target->GetPitch() == width_ * Orthanc::GetBytesPerPixel(format));
 
       glBindTexture(GL_TEXTURE_2D, texture_);
 
@@ -177,6 +184,10 @@
           glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RGBA, GL_UNSIGNED_BYTE, target->GetBuffer());
           break;
 
+        case Orthanc::PixelFormat_Float32:
+          glGetTexImage(GL_TEXTURE_2D, 0 /* base level */, GL_RED, GL_FLOAT, target->GetBuffer());
+          break;
+
         default:
           throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
       }