X-Git-Url: https://git.sesse.net/?p=movit;a=blobdiff_plain;f=resample_effect.h;h=7538a68c143e8bd29cdac1078b94bd456bf2c9f6;hp=1424bbfd5b43de6e1da710d182516025d0de5553;hb=1fb55b14a6c694e082f0261e86f26d4f82948821;hpb=5215390259a3b39c576b63853240bbf1f1f6dc46

diff --git a/resample_effect.h b/resample_effect.h
index 1424bbf..7538a68 100644
--- a/resample_effect.h
+++ b/resample_effect.h
@@ -1,5 +1,5 @@
-#ifndef _RESAMPLE_EFFECT_H
-#define _RESAMPLE_EFFECT_H 1
+#ifndef _MOVIT_RESAMPLE_EFFECT_H
+#define _MOVIT_RESAMPLE_EFFECT_H 1
 
 // High-quality image resizing, either up or down.
 //
@@ -15,10 +15,37 @@
 // which is what the user is intended to use, instantiates two copies of
 // SingleResamplePassEffect behind the scenes).
 
+#include <epoxy/gl.h>
+#include <assert.h>
+#include <stddef.h>
+#include <memory>
+#include <string>
+
 #include "effect.h"
+#include "fp16.h"
+
+namespace movit {
 
+class EffectChain;
+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_scaling_weights(unsigned src_size, unsigned dst_size, float zoom, float offset);
+
 class ResampleEffect : public Effect {
 public:
 	ResampleEffect();
@@ -44,9 +71,15 @@ public:
 	
 private:
 	void update_size();
+	void update_offset_and_zoom();
 	
 	SingleResamplePassEffect *hpass, *vpass;
 	int input_width, input_height, output_width, output_height;
+
+	float offset_x, offset_y;
+	float zoom_x, zoom_y;
+	float zoom_center_x, zoom_center_y;
+	float unused;
 };
 
 class SingleResamplePassEffect : public Effect {
@@ -62,17 +95,20 @@ public:
 
 	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; }
 
+	virtual void inform_added(EffectChain *chain) { this->chain = chain; }
 	virtual void inform_input_size(unsigned input_num, unsigned width, unsigned height) {
 		if (parent != NULL) {
 			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; }
 
-	virtual void get_output_size(unsigned *width, unsigned *height) const {
-		*width = this->output_width;
-		*height = this->output_height;
+	virtual void get_output_size(unsigned *width, unsigned *height, unsigned *virtual_width, unsigned *virtual_height) const {
+		*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);
@@ -83,12 +119,25 @@ private:
 	void update_texture(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
 
 	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;
+	float unused;
 	int last_input_width, last_input_height, last_output_width, last_output_height;
-	int src_samples, num_loops;
+	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;
 };
 
-#endif // !defined(_RESAMPLE_EFFECT_H)
+}  // namespace movit
+
+#endif // !defined(_MOVIT_RESAMPLE_EFFECT_H)