std::vector<Node *> effects; // In order.
unsigned output_width, output_height, virtual_output_width, virtual_output_height;
+ // Whether this phase is compiled as a compute shader, ie., the last effect is
+ // marked as one.
+ bool is_compute_shader;
+
+ // If <is_compute_shader>, which image unit the output buffer is bound to.
+ // This is used as source for a Uniform<int> below.
+ int outbuf_image_unit;
+
+ // These are used in transforming from unnormalized to normalized coordinates
+ // in compute shaders.
+ Point2D inv_output_size, output_texcoord_adjust;
+
// Identifier used to create unique variables in GLSL.
// Unique per-phase to increase cacheability of compiled shaders.
std::map<Node *, std::string> effect_ids;
// Uniforms for this phase; combined from all the effects.
- std::vector<Uniform<int> > uniforms_sampler2d;
- std::vector<Uniform<bool> > uniforms_bool;
- std::vector<Uniform<int> > uniforms_int;
- std::vector<Uniform<float> > uniforms_float;
- std::vector<Uniform<float> > uniforms_vec2;
- std::vector<Uniform<float> > uniforms_vec3;
- std::vector<Uniform<float> > uniforms_vec4;
- std::vector<Uniform<Eigen::Matrix3d> > uniforms_mat3;
+ std::vector<Uniform<int>> uniforms_image2d;
+ std::vector<Uniform<int>> uniforms_sampler2d;
+ std::vector<Uniform<bool>> uniforms_bool;
+ std::vector<Uniform<int>> uniforms_int;
+ std::vector<Uniform<float>> uniforms_float;
+ std::vector<Uniform<float>> uniforms_vec2;
+ std::vector<Uniform<float>> uniforms_vec3;
+ std::vector<Uniform<float>> uniforms_vec4;
+ std::vector<Uniform<Eigen::Matrix3d>> uniforms_mat3;
// For measurement of GPU time used.
std::list<GLuint> timer_query_objects_running;
public:
// Aspect: e.g. 16.0f, 9.0f for 16:9.
// resource_pool is a pointer to a ResourcePool with which to share shaders
- // and other resources (see resource_pool.h). If NULL (the default),
+ // and other resources (see resource_pool.h). If nullptr (the default),
// will create its own that is not shared with anything else. Does not take
// ownership of the passed-in ResourcePool, but will naturally take ownership
// of its own internal one if created.
- EffectChain(float aspect_nom, float aspect_denom, ResourcePool *resource_pool = NULL);
+ EffectChain(float aspect_nom, float aspect_denom, ResourcePool *resource_pool = nullptr);
~EffectChain();
// User API:
// the current viewport.
void render_to_fbo(GLuint fbo, unsigned width, unsigned height);
+ // Render the effect chain to the given set of textures. This is equivalent
+ // to render_to_fbo() with a freshly created FBO bound to the given textures,
+ // except that it is more efficient if the last phase contains a compute shader.
+ // Thus, prefer this to render_to_fbo() where possible.
+ //
+ // Only one destination texture is supported. This restriction will be lifted
+ // in the future.
+ //
+ // All destination textures must be exactly of size <width> x <height>,
+ // and must either come from the same ResourcePool the effect uses, or outlive
+ // the EffectChain (otherwise, we could be allocating FBOs that end up being
+ // stale). Textures must also have valid state; in particular, they must either
+ // be mipmap complete or have a non-mipmapped minification mode.
+ //
+ // width and height can not be zero.
+ struct DestinationTexture {
+ GLuint texnum;
+ GLenum format;
+ };
+ void render_to_texture(const std::vector<DestinationTexture> &destinations, unsigned width, unsigned height);
+
Effect *last_added_effect() {
if (nodes.empty()) {
- return NULL;
+ return nullptr;
} else {
return nodes.back()->effect;
}
// as the last effect. Also pushes all phases in order onto <phases>.
Phase *construct_phase(Node *output, std::map<Node *, Phase *> *completed_effects);
+ // Do the actual rendering of the chain. If <dest_fbo> is not (GLuint)-1,
+ // renders to that FBO. If <destinations> is non-empty, render to that set
+ // of textures (last phase, save for the dummy phase, must be a compute shader),
+ // with x/y ignored. Having both set is an error.
+ void render(GLuint dest_fbo, const std::vector<DestinationTexture> &destinations,
+ unsigned x, unsigned y, unsigned width, unsigned height);
+
// Execute one phase, ie. set up all inputs, effects and outputs, and render the quad.
- void execute_phase(Phase *phase, bool last_phase,
- std::map<Phase *, GLuint> *output_textures,
+ // If <destinations> is empty, uses whatever output is current (and the phase must not be
+ // a compute shader).
+ void execute_phase(Phase *phase,
+ const std::map<Phase *, GLuint> &output_textures,
+ const std::vector<DestinationTexture> &destinations,
std::set<Phase *> *generated_mipmaps);
// Set up uniforms for one phase. The program must already be bound.
void fix_output_gamma();
void add_ycbcr_conversion_if_needed();
void add_dither_if_needed();
+ void add_dummy_effect_if_needed();
float aspect_nom, aspect_denom;
ImageFormat output_format;
bool finalized;
GLuint vbo; // Contains vertex and texture coordinate data.
+ // Whether the last effect (which will then be in a phase all by itself)
+ // is a dummy effect that is only added because the last phase uses a compute
+ // shader, which cannot output directly to the backbuffer. This means that
+ // the phase can be skipped if we are _not_ rendering to the backbuffer.
+ bool has_dummy_effect = false;
+
ResourcePool *resource_pool;
bool owns_resource_pool;
projects / movit / blobdiff