Implement render_target_was_used API so that Viewports can properly check if they have been used.

For the RD renderer, this does not work for Viewports used in scene shaders yet

3 files changed, 20 insertions, 5 deletions

diff --git a/drivers/gles3/storage/material_storage.cpp b/drivers/gles3/storage/material_storage.cpp
index e7eeacf576..ebafdc88d8 100644
--- a/drivers/gles3/storage/material_storage.cpp
+++ b/drivers/gles3/storage/material_storage.cpp
@@ -3027,6 +3027,9 @@ void CanvasMaterialData::bind_uniforms() {
 		Texture *texture = TextureStorage::get_singleton()->get_texture(textures[ti]);
 		glActiveTexture(GL_TEXTURE1 + ti); // Start at GL_TEXTURE1 because texture slot 0 is used by the base texture
 		glBindTexture(target_from_type[texture_uniforms[ti].type], texture->tex_id);
+		if (texture->render_target) {
+			texture->render_target->used_in_frame = true;
+		}
 
 		// Set sampler state here as the same texture can be used in multiple places with different flags
 		// Need to convert sampler state from ShaderLanguage::Texture* to RS::CanvasItemTexture*
@@ -3194,6 +3197,9 @@ void SkyMaterialData::bind_uniforms() {
 		Texture *texture = TextureStorage::get_singleton()->get_texture(textures[ti]);
 		glActiveTexture(GL_TEXTURE0 + ti);
 		glBindTexture(target_from_type[texture_uniforms[ti].type], texture->tex_id);
+		if (texture->render_target) {
+			texture->render_target->used_in_frame = true;
+		}
 
 		// Set sampler state here as the same texture can be used in multiple places with different flags
 		// Need to convert sampler state from ShaderLanguage::Texture* to RS::CanvasItemTexture*
@@ -3447,6 +3453,9 @@ void SceneMaterialData::bind_uniforms() {
 		Texture *texture = TextureStorage::get_singleton()->get_texture(textures[ti]);
 		glActiveTexture(GL_TEXTURE0 + ti);
 		glBindTexture(target_from_type[texture_uniforms[ti].type], texture->tex_id);
+		if (texture->render_target) {
+			texture->render_target->used_in_frame = true;
+		}
 
 		// Set sampler state here as the same texture can be used in multiple places with different flags
 		// Need to convert sampler state from ShaderLanguage::Texture* to RS::CanvasItemTexture*
@@ -3562,6 +3571,9 @@ void ParticleProcessMaterialData::bind_uniforms() {
 		Texture *texture = TextureStorage::get_singleton()->get_texture(textures[ti]);
 		glActiveTexture(GL_TEXTURE1 + ti); // Start at GL_TEXTURE1 because texture slot 0 is reserved for the heightmap texture.
 		glBindTexture(target_from_type[texture_uniforms[ti].type], texture->tex_id);
+		if (texture->render_target) {
+			texture->render_target->used_in_frame = true;
+		}
 
 		// Set sampler state here as the same texture can be used in multiple places with different flags
 		// Need to convert sampler state from ShaderLanguage::Texture* to RS::CanvasItemTexture*
diff --git a/drivers/gles3/storage/particles_storage.cpp b/drivers/gles3/storage/particles_storage.cpp
index 1a0d97df01..3a6281a529 100644
--- a/drivers/gles3/storage/particles_storage.cpp
+++ b/drivers/gles3/storage/particles_storage.cpp
@@ -53,7 +53,7 @@ ParticlesStorage::ParticlesStorage() {
 	{
 		String global_defines;
 		global_defines += "#define MAX_GLOBAL_SHADER_UNIFORMS 256\n"; // TODO: this is arbitrary for now
-		material_storage->shaders.particles_process_shader.initialize(global_defines);
+		material_storage->shaders.particles_process_shader.initialize(global_defines, 1);
 	}
 	{
 		// default material and shader for particles shader
diff --git a/drivers/gles3/storage/texture_storage.cpp b/drivers/gles3/storage/texture_storage.cpp
index 99908d197a..e6aa6a39c1 100644
--- a/drivers/gles3/storage/texture_storage.cpp
+++ b/drivers/gles3/storage/texture_storage.cpp
@@ -1606,9 +1606,9 @@ void TextureStorage::_update_render_target(RenderTarget *rt) {
 			return;
 		}
 
-		if (rt->overridden.color.is_valid()) {
-			texture->is_render_target = true;
-		} else {
+		texture->is_render_target = true;
+		texture->render_target = rt;
+		if (rt->overridden.color.is_null()) {
 			texture->format = rt->image_format;
 			texture->real_format = rt->image_format;
 			texture->target = texture_target;
@@ -1717,9 +1717,12 @@ void TextureStorage::_clear_render_target(RenderTarget *rt) {
 			tex->width = 0;
 			tex->height = 0;
 			tex->active = false;
+			tex->render_target = nullptr;
+			tex->is_render_target = false;
 		}
 	} else {
 		Texture *tex = get_texture(rt->overridden.color);
+		tex->render_target = nullptr;
 		tex->is_render_target = false;
 	}
 
@@ -1751,7 +1754,7 @@ void TextureStorage::_clear_render_target(RenderTarget *rt) {
 
 RID TextureStorage::render_target_create() {
 	RenderTarget render_target;
-	//render_target.was_used = false;
+	render_target.used_in_frame = false;
 	render_target.clear_requested = false;
 
 	Texture t;