// but if so, the threads' contexts need to be set up to share resources, since
// the EffectChain holds textures and other OpenGL objects that are tied to the
// context.
+//
+// Memory management (only relevant if you use multiple contexts):
+// See corresponding comment in resource_pool.h. This holds even if you don't
+// allocate your own ResourcePool, but let EffectChain hold its own.
-#include <GL/glew.h>
+#include <epoxy/gl.h>
#include <stdio.h>
+#include <list>
#include <map>
#include <set>
#include <string>
#include <vector>
+#include <Eigen/Core>
+#include "effect.h"
#include "image_format.h"
+#include "ycbcr.h"
namespace movit {
OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED,
};
+// RGBA output is nearly always packed; Y'CbCr, however, is often planar
+// due to chroma subsampling. This enum controls how add_ycbcr_output()
+// distributes the color channels between the fragment shader outputs.
+// Obviously, anything except YCBCR_OUTPUT_INTERLEAVED will be meaningless
+// unless you use render_to_fbo() and have an FBO with multiple render
+// targets attached (the other outputs will be discarded).
+enum YCbCrOutputSplitting {
+ // Only one output: Store Y'CbCr into the first three output channels,
+ // respectively, plus alpha. This is also called “chunked” or
+ // ”packed” mode.
+ YCBCR_OUTPUT_INTERLEAVED,
+
+ // Store Y' and alpha into the first output (in the red and alpha
+ // channels; effect to the others is undefined), and Cb and Cr into
+ // the first two channels of the second output. This is particularly
+ // useful if you want to end up in a format like NV12, where all the
+ // Y' samples come first and then Cb and Cr come interlevaed afterwards.
+ // You will still need to do the chroma subsampling yourself to actually
+ // get down to NV12, though.
+ YCBCR_OUTPUT_SPLIT_Y_AND_CBCR,
+
+ // Store Y' and alpha into the first output, Cb into the first channel
+ // of the second output and Cr into the first channel of the third output.
+ // (Effect on the other channels is undefined.) Essentially gives you
+ // 4:4:4 planar, or ”yuv444p”.
+ YCBCR_OUTPUT_PLANAR,
+};
+
+// Where (0,0) is taken to be in the output. If you want to render to an
+// OpenGL screen, you should keep the default of bottom-left, as that is
+// OpenGL's natural coordinate system. However, there are cases, such as if you
+// render to an FBO and read the pixels back into some other system, where
+// you'd want a top-left origin; if so, an additional flip step will be added
+// at the very end (but done in a vertex shader, so it will have zero extra
+// cost).
+//
+// Note that Movit's coordinate system in general consistently puts (0,0) in
+// the top left for _input_, no matter what you set as output origin.
+enum OutputOrigin {
+ OUTPUT_ORIGIN_BOTTOM_LEFT,
+ OUTPUT_ORIGIN_TOP_LEFT,
+};
+
// A node in the graph; basically an effect and some associated information.
class Node {
public:
std::vector<Node *> outgoing_links;
std::vector<Node *> incoming_links;
+ // For unit tests only. Do not use from other code.
+ // Will contain an arbitrary choice if the node is in multiple phases.
+ Phase *containing_phase;
+
private:
// Logical size of the output of this effect, ie. the resolution
// you would get if you sampled it as a texture. If it is undefined
Colorspace output_color_space;
GammaCurve output_gamma_curve;
AlphaType output_alpha_type;
+ bool needs_mipmaps; // Directly or indirectly.
+
+ // Set if this effect, and all effects consuming output from this node
+ // (in the same phase) have one_to_one_sampling() set.
+ bool one_to_one_sampling;
friend class EffectChain;
};
Node *output_node;
GLuint glsl_program_num; // Owned by the resource_pool.
+
+ // Position and texcoord attribute indexes, although it doesn't matter
+ // which is which, because they contain the same data.
+ std::set<GLint> attribute_indexes;
+
bool input_needs_mipmaps;
// Inputs are only inputs from other phases (ie., those that come from RTT);
// input textures are counted as part of <effects>.
std::vector<Phase *> inputs;
+ // Bound sampler numbers for each input. Redundant in a sense
+ // (it always corresponds to the index), but we need somewhere
+ // to hold the value for the uniform.
+ std::vector<int> input_samplers;
std::vector<Node *> effects; // In order.
unsigned output_width, output_height, virtual_output_width, virtual_output_height;
// 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;
+
+ GLuint ubo; // GL_INVALID_INDEX if not using UBOs.
+ GLuint uniform_block_index;
+ std::vector<char> ubo_data;
+
+ // For measurement of GPU time used.
+ std::list<GLuint> timer_query_objects_running;
+ std::list<GLuint> timer_query_objects_free;
+ uint64_t time_elapsed_ns;
+ uint64_t num_measured_iterations;
};
class EffectChain {
// 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 = NULL, GLenum intermediate_format = GL_RGBA16F);
~EffectChain();
// User API:
inputs.push_back(input3);
return add_effect(effect, inputs);
}
+ Effect *add_effect(Effect *effect, Effect *input1, Effect *input2, Effect *input3, Effect *input4) {
+ std::vector<Effect *> inputs;
+ inputs.push_back(input1);
+ inputs.push_back(input2);
+ inputs.push_back(input3);
+ inputs.push_back(input4);
+ return add_effect(effect, inputs);
+ }
+ Effect *add_effect(Effect *effect, Effect *input1, Effect *input2, Effect *input3, Effect *input4, Effect *input5) {
+ std::vector<Effect *> inputs;
+ inputs.push_back(input1);
+ inputs.push_back(input2);
+ inputs.push_back(input3);
+ inputs.push_back(input4);
+ inputs.push_back(input5);
+ return add_effect(effect, inputs);
+ }
Effect *add_effect(Effect *effect, const std::vector<Effect *> &inputs);
+ // Adds an RGBA output. Note that you can have at most one RGBA output and one
+ // Y'CbCr output (see below for details).
void add_output(const ImageFormat &format, OutputAlphaFormat alpha_format);
+ // Adds an YCbCr output. Note that you can only have one output.
+ // Currently, only chunked packed output is supported, and only 4:4:4
+ // (so chroma_subsampling_x and chroma_subsampling_y must both be 1).
+ //
+ // If you have both RGBA and Y'CbCr output, the RGBA output will come
+ // in the last draw buffer. Also, <format> and <alpha_format> must be
+ // identical between the two.
+ void add_ycbcr_output(const ImageFormat &format, OutputAlphaFormat alpha_format,
+ const YCbCrFormat &ycbcr_format,
+ YCbCrOutputSplitting output_splitting = YCBCR_OUTPUT_INTERLEAVED);
+
// Set number of output bits, to scale the dither.
// 8 is the right value for most outputs.
// The default, 0, is a special value that means no dither.
this->num_dither_bits = num_bits;
}
+ // Set where (0,0) is taken to be in the output. The default is
+ // OUTPUT_ORIGIN_BOTTOM_LEFT, which is usually what you want
+ // (see OutputOrigin above for more details).
+ void set_output_origin(OutputOrigin output_origin)
+ {
+ this->output_origin = output_origin;
+ }
+
void finalize();
+ // Measure the GPU time used for each actual phase during rendering.
+ // Note that this is only available if GL_ARB_timer_query
+ // (or, equivalently, OpenGL 3.3) is available. Also note that measurement
+ // will incur a performance cost, as we wait for the measurements to
+ // complete at the end of rendering.
+ void enable_phase_timing(bool enable);
+ void reset_phase_timing();
+ void print_phase_timing();
//void render(unsigned char *src, unsigned char *dst);
void render_to_screen()
// single-sampler input, or from an RTT texture.
GLenum get_input_sampler(Node *node, unsigned input_num) const;
+ // Whether input <input_num> of <node> corresponds to a single sampler
+ // (see get_input_sampler()). Normally, you should not need to call this;
+ // however, if the input Effect has set override_texture_bounce(),
+ // this will return false, and you could be flexible and check it first
+ // if you want.
+ GLenum has_input_sampler(Node *node, unsigned input_num) const;
+
// Get the current resource pool assigned to this EffectChain.
// Primarily to let effects allocate textures as needed.
// Any resources you get from the pool must be returned to the pool
// as the last effect. Also pushes all phases in order onto <phases>.
Phase *construct_phase(Node *output, std::map<Node *, Phase *> *completed_effects);
+ // Execute one phase, ie. set up all inputs, effects and outputs, and render the quad.
+ void execute_phase(Phase *phase, bool last_phase,
+ std::set<GLint> *bound__attribute_indices,
+ std::map<Phase *, GLuint> *output_textures,
+ std::set<Phase *> *generated_mipmaps);
+
+ // Set up uniforms for one phase. The program must already be bound.
+ void setup_uniforms(Phase *phase);
+
+ // Set up the given sampler number for sampling from an RTT texture.
+ void setup_rtt_sampler(int sampler_num, bool use_mipmaps);
+
// Output the current graph to the given file in a Graphviz-compatible format;
// only useful for debugging.
void output_dot(const char *filename);
void fix_internal_gamma_by_asking_inputs(unsigned step);
void fix_internal_gamma_by_inserting_nodes(unsigned step);
void fix_output_gamma();
+ void add_ycbcr_conversion_if_needed();
void add_dither_if_needed();
float aspect_nom, aspect_denom;
ImageFormat output_format;
OutputAlphaFormat output_alpha_format;
+ bool output_color_rgba, output_color_ycbcr;
+ YCbCrFormat output_ycbcr_format; // If output_color_ycbcr is true.
+ YCbCrOutputSplitting output_ycbcr_splitting; // If output_color_ycbcr is true.
+
std::vector<Node *> nodes;
std::map<Effect *, Node *> node_map;
Effect *dither_effect;
- std::map<void *, GLuint> fbos; // One for each OpenGL context.
std::vector<Input *> inputs; // Also contained in nodes.
std::vector<Phase *> phases;
+ GLenum intermediate_format;
unsigned num_dither_bits;
+ OutputOrigin output_origin;
bool finalized;
+ GLuint vbo; // Contains vertex and texture coordinate data.
ResourcePool *resource_pool;
bool owns_resource_pool;
+
+ bool do_phase_timing;
};
} // namespace movit
projects / movit / blobdiff