Fix compute shader outputs on NVIDIA.

diff --git a/effect_chain.cpp b/effect_chain.cpp
index 0e20ce097be8a29ff85ff9b4fbe089a273ddbe75..fe07a3f909d0f3a3caaf1c41058329ce2f4f12bc 100644 (file)
--- a/effect_chain.cpp
+++ b/effect_chain.cpp
@@ -1993,6 +1993,16 @@ void EffectChain::execute_phase(Phase *phase, bool last_phase,
 
                GLuint tex_num = resource_pool->create_2d_texture(intermediate_format, phase->output_width, phase->output_height);
                output_textures->insert(make_pair(phase, tex_num));
+
+               // The output texture needs to have valid state to be written to by a compute shader.
+               if (phase->is_compute_shader) {
+                       glActiveTexture(GL_TEXTURE0);
+                       check_error();
+                       glBindTexture(GL_TEXTURE_2D, (*output_textures)[phase]);
+                       check_error();
+                       glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+                       check_error();
+               }
        }
 
        // Set up RTT inputs for this phase.