From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Sat, 18 Nov 2017 20:20:06 +0000 (+0100)
Subject: Fix compute shader outputs on NVIDIA.
X-Git-Tag: 1.6.0~57
X-Git-Url: https://git.sesse.net/?p=movit;a=commitdiff_plain;h=c220f1f515ce115e049dfff990b08b2592bd8f8d

Fix compute shader outputs on NVIDIA.
---

diff --git a/effect_chain.cpp b/effect_chain.cpp
index 0e20ce0..fe07a3f 100644
--- 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.