X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=effect_chain.cpp;h=b82102357180d2534c82018c2bc82ecfa1230019;hb=a48d62d61ada1226caaa9fd42846672cfe0249e8;hp=a4d9c86761a48458a35a340ee5884c3156ac670a;hpb=12a1f8177c22386171ded47947b9422f27f5f1b2;p=movit

diff --git a/effect_chain.cpp b/effect_chain.cpp
index a4d9c86..b821023 100644
--- a/effect_chain.cpp
+++ b/effect_chain.cpp
@@ -555,20 +555,31 @@ void EffectChain::compile_glsl_program(Phase *phase)
 		extract_uniform_declarations(effect->uniforms_mat3, "mat3", effect_id, &phase->uniforms_mat3, &frag_shader_uniforms);
 	}
 
-	frag_shader = frag_shader_header + frag_shader_uniforms + frag_shader;
-
 	string vert_shader = read_version_dependent_file("vs", "vert");
 
 	// If we're the last phase and need to flip the picture to compensate for
-	// the origin, tell the vertex shader so.
-	if (phase->output_node->outgoing_links.empty() && output_origin == OUTPUT_ORIGIN_TOP_LEFT) {
-		const string needle = "#define FLIP_ORIGIN 0";
-		size_t pos = vert_shader.find(needle);
-		assert(pos != string::npos);
+	// the origin, tell the vertex or compute shader so.
+	bool is_last_phase;
+	if (has_dummy_effect) {
+		is_last_phase = (phase->output_node->outgoing_links.size() == 1 &&
+			phase->output_node->outgoing_links[0]->effect->effect_type_id() == "ComputeShaderOutputDisplayEffect");
+	} else {
+		is_last_phase = phase->output_node->outgoing_links.empty();
+	}
+	if (is_last_phase && output_origin == OUTPUT_ORIGIN_TOP_LEFT) {
+		if (phase->is_compute_shader) {
+			frag_shader_header += "#define FLIP_ORIGIN 1\n";
+		} else {
+			const string needle = "#define FLIP_ORIGIN 0";
+			size_t pos = vert_shader.find(needle);
+			assert(pos != string::npos);
 
-		vert_shader[pos + needle.size() - 1] = '1';
+			vert_shader[pos + needle.size() - 1] = '1';
+		}
 	}
 
+	frag_shader = frag_shader_header + frag_shader_uniforms + frag_shader;
+
 	if (phase->is_compute_shader) {
 		phase->glsl_program_num = resource_pool->compile_glsl_compute_program(frag_shader);