#include <epoxy/gl.h>
#include <assert.h>
#include <stddef.h>
+#include <memory>
#include <string>
#include "effect.h"
+#include "fp16.h"
namespace movit {
class Node;
class SingleResamplePassEffect;
+// Public so that it can be benchmarked externally.
+template<class T>
+struct Tap {
+ T weight;
+ T pos;
+};
+struct ScalingWeights {
+ unsigned src_bilinear_samples;
+ unsigned dst_samples, num_loops;
+
+ // Exactly one of these is set.
+ std::unique_ptr<Tap<fp16_int_t>[]> bilinear_weights_fp16;
+ std::unique_ptr<Tap<float>[]> bilinear_weights_fp32;
+};
+ScalingWeights calculate_bilinear_scaling_weights(unsigned src_size, unsigned dst_size, float zoom, float offset);
+
+// A simple manager for support data stored in a 2D texture.
+// Consider moving it to a shared location of more classes
+// should need similar functionality.
+class Support2DTexture {
+public:
+ Support2DTexture();
+ ~Support2DTexture();
+
+ void update(GLint width, GLint height, GLenum internal_format, GLenum format, GLenum type, const GLvoid * data);
+ GLint get_texnum() const { return texnum; }
+
+private:
+ GLuint texnum = 0;
+ GLint last_texture_width = -1, last_texture_height = -1;
+ GLenum last_texture_internal_format = GL_INVALID_ENUM;
+};
+
class ResampleEffect : public Effect {
public:
ResampleEffect();
+ ~ResampleEffect();
- virtual std::string effect_type_id() const { return "ResampleEffect"; }
+ std::string effect_type_id() const override { return "ResampleEffect"; }
- // We want this for the same reason as ResizeEffect; we could end up scaling
- // down quite a lot.
- virtual bool needs_texture_bounce() const { return true; }
- virtual bool needs_srgb_primaries() const { return false; }
+ void inform_input_size(unsigned input_num, unsigned width, unsigned height) override;
- virtual void inform_input_size(unsigned input_num, unsigned width, unsigned height);
-
- virtual std::string output_fragment_shader() {
+ std::string output_fragment_shader() override {
assert(false);
}
- virtual void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) {
+ void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) override {
assert(false);
}
- virtual void rewrite_graph(EffectChain *graph, Node *self);
- virtual bool set_float(const std::string &key, float value);
+ void rewrite_graph(EffectChain *graph, Node *self) override;
+ bool set_float(const std::string &key, float value) override;
private:
void update_size();
void update_offset_and_zoom();
- SingleResamplePassEffect *hpass, *vpass;
+ // Both of these are owned by us if owns_effects is true (before finalize()),
+ // and otherwise owned by the EffectChain.
+ std::unique_ptr<SingleResamplePassEffect> hpass_owner, vpass_owner;
+ SingleResamplePassEffect *hpass = nullptr, *vpass = nullptr;
int input_width, input_height, output_width, output_height;
float offset_x, offset_y;
class SingleResamplePassEffect : public Effect {
public:
- // If parent is non-NULL, calls to inform_input_size will be forwarded,
+ // If parent is non-nullptr, calls to inform_input_size will be forwarded,
// so that it can inform both passes about the right input and output
// resolutions.
SingleResamplePassEffect(ResampleEffect *parent);
~SingleResamplePassEffect();
- virtual std::string effect_type_id() const { return "SingleResamplePassEffect"; }
+ std::string effect_type_id() const override { return "SingleResamplePassEffect"; }
+
+ std::string output_fragment_shader() override;
- std::string output_fragment_shader();
+ bool needs_texture_bounce() const override { return true; }
+ bool needs_srgb_primaries() const override { return false; }
+ AlphaHandling alpha_handling() const override { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
- virtual bool needs_texture_bounce() const { return true; }
- virtual bool needs_srgb_primaries() const { return false; }
- virtual AlphaHandling alpha_handling() const { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
+ // We specifically do not want mipmaps on the input texture;
+ // they break minification.
+ MipmapRequirements needs_mipmaps() const override { return CANNOT_ACCEPT_MIPMAPS; }
- virtual void inform_added(EffectChain *chain) { this->chain = chain; }
- virtual void inform_input_size(unsigned input_num, unsigned width, unsigned height) {
- if (parent != NULL) {
+ void inform_added(EffectChain *chain) override { this->chain = chain; }
+ void inform_input_size(unsigned input_num, unsigned width, unsigned height) override {
+ if (parent != nullptr) {
parent->inform_input_size(input_num, width, height);
}
}
- virtual bool changes_output_size() const { return true; }
- virtual bool sets_virtual_output_size() const { return false; }
+ bool changes_output_size() const override { return true; }
+ bool sets_virtual_output_size() const override { return false; }
- virtual void get_output_size(unsigned *width, unsigned *height, unsigned *virtual_width, unsigned *virtual_height) const {
+ void get_output_size(unsigned *width, unsigned *height, unsigned *virtual_width, unsigned *virtual_height) const override {
*virtual_width = *width = this->output_width;
*virtual_height = *height = this->output_height;
}
- void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
+ void set_gl_state(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num) override;
enum Direction { HORIZONTAL = 0, VERTICAL = 1 };
ResampleEffect *parent;
EffectChain *chain;
Direction direction;
- GLuint texnum;
+ GLint uniform_sample_tex;
+ float uniform_num_loops, uniform_slice_height, uniform_sample_x_scale, uniform_sample_x_offset;
+ float uniform_whole_pixel_offset;
+ int uniform_num_samples;
+
int input_width, input_height, output_width, output_height;
float offset, zoom;
int last_input_width, last_input_height, last_output_width, last_output_height;
float last_offset, last_zoom;
int src_bilinear_samples, num_loops;
float slice_height;
- int last_texture_width, last_texture_height;
- GLuint last_texture_internal_format;
+ Support2DTexture tex;
};
} // namespace movit
projects / movit / blobdiff