VertexRoutine code for Transform Feedback
This cl adds the code that actually performs the copy of the
vertex shader outputs into transform feedback buffers. It
also contains a fix for symmetricNormalizedDepth, which must
be computed after the information was copied into the
transform feedback buffers, when transform feedback is active.
Change-Id: I418f94a15b9425bba0905c840f8cf4828233d0fb
Reviewed-on: https://swiftshader-review.googlesource.com/5172
Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
diff --git a/src/Renderer/VertexProcessor.cpp b/src/Renderer/VertexProcessor.cpp
index 90c954f..73f277b 100644
--- a/src/Renderer/VertexProcessor.cpp
+++ b/src/Renderer/VertexProcessor.cpp
@@ -839,7 +839,7 @@
routineCache = new RoutineCache<State>(clamp(cacheSize, 1, 65536), precacheVertex ? "sw-vertex" : 0);
}
- const VertexProcessor::State VertexProcessor::update()
+ const VertexProcessor::State VertexProcessor::update(DrawType drawType)
{
if(isFixedFunction())
{
@@ -912,6 +912,11 @@
state.transformFeedbackQueryEnabled = context->transformFeedbackQueryEnabled;
state.transformFeedbackEnabled = context->transformFeedbackEnabled;
+ // Note: Quads aren't handled for verticesPerPrimitive, but verticesPerPrimitive is used for transform feedback,
+ // which is an OpenGL ES 3.0 feature, and OpenGL ES 3.0 doesn't support quads as a primitive type.
+ DrawType type = static_cast<DrawType>(static_cast<unsigned int>(drawType) & 0xF);
+ state.verticesPerPrimitive = 1 + (type >= DRAW_LINELIST) + (type >= DRAW_TRIANGLELIST);
+
for(int i = 0; i < MAX_VERTEX_INPUTS; i++)
{
state.input[i].type = context->input[i].type;
