Fix a bug when scaling and doing offset at the same time. (At least one more remains.)

[movit] / resample_effect.h

diff --git a/resample_effect.h b/resample_effect.h
index b38728f05fa423061bb9002ce2bfb261ff73c4ff..c52a973c18b055c2927896f9e585ea3de9bfa4d7 100644 (file)
--- 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.
 //
@@ -15,8 +15,17 @@
 // 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 <string>
+
 #include "effect.h"
 
+namespace movit {
+
+class EffectChain;
+class Node;
 class SingleResamplePassEffect;
 
 class ResampleEffect : public Effect {
@@ -29,7 +38,6 @@ public:
        // down quite a lot.
        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_input_size(unsigned input_num, unsigned width, unsigned height);
 
@@ -63,7 +71,9 @@ 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);
@@ -84,12 +94,17 @@ private:
        void update_texture(GLuint glsl_program_num, const std::string &prefix, unsigned *sampler_num);
 
        ResampleEffect *parent;
+       EffectChain *chain;
        Direction direction;
        GLuint texnum;
        int input_width, input_height, output_width, output_height;
+       float offset;
        int last_input_width, last_input_height, last_output_width, last_output_height;
+       float last_offset;
        int src_bilinear_samples, num_loops;
        float slice_height;
 };
 
-#endif // !defined(_RESAMPLE_EFFECT_H)
+}  // namespace movit
+
+#endif // !defined(_MOVIT_RESAMPLE_EFFECT_H)