Move the functionality for updating the support texture using glTexImage2D or glTexSu...

[movit] / resample_effect.h

diff --git a/resample_effect.h b/resample_effect.h
index 4cde466c2d85de4a4b81bb5880399c197a11d63e..1822a3ea6b261fa833d59c4e4e2e0e276b83ca4b 100644 (file)
--- a/resample_effect.h
+++ b/resample_effect.h
@@ -46,6 +46,23 @@ struct ScalingWeights {
 };
 ScalingWeights calculate_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();
@@ -124,7 +141,6 @@ private:
        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;
@@ -136,8 +152,7 @@ private:
        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