105 lines
4.2 KiB
C
105 lines
4.2 KiB
C
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/**
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* PANDA 3D SOFTWARE
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* Copyright (c) Carnegie Mellon University. All rights reserved.
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*
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* All use of this software is subject to the terms of the revised BSD
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* license. You should have received a copy of this license along
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* with this source code in a file named "LICENSE."
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*
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* @file texturePeeker.h
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* @author drose
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* @date 2008-08-26
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*/
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#ifndef TEXTUREPEEKER_H
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#define TEXTUREPEEKER_H
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#include "pandabase.h"
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#include "referenceCount.h"
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#include "texture.h"
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/**
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* An instance of this object is returned by Texture::peek(). This object
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* allows quick and easy inspection of a texture's texels by (u, v)
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* coordinates.
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*/
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class EXPCL_PANDA_GOBJ TexturePeeker : public ReferenceCount {
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private:
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TexturePeeker(Texture *tex, Texture::CData *cdata);
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public:
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INLINE bool is_valid() const;
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PUBLISHED:
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INLINE int get_x_size() const;
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INLINE int get_y_size() const;
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INLINE int get_z_size() const;
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INLINE bool has_pixel(int x, int y) const;
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void lookup(LColor &color, PN_stdfloat u, PN_stdfloat v) const;
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void lookup(LColor &color, PN_stdfloat u, PN_stdfloat v, PN_stdfloat w) const;
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void fetch_pixel(LColor &color, int x, int y) const;
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bool lookup_bilinear(LColor &color, PN_stdfloat u, PN_stdfloat v) const;
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void filter_rect(LColor &color,
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PN_stdfloat min_u, PN_stdfloat min_v,
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PN_stdfloat max_u, PN_stdfloat max_v) const;
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void filter_rect(LColor &color,
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PN_stdfloat min_u, PN_stdfloat min_v, PN_stdfloat min_w,
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PN_stdfloat max_u, PN_stdfloat max_v, PN_stdfloat max_w) const;
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private:
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static void init_rect_minmax(int &min_x, int &max_x,
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PN_stdfloat &min_u, PN_stdfloat &max_u,
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int x_size);
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void accum_filter_z(LColor &color, PN_stdfloat &net,
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int min_x, int max_x, PN_stdfloat min_u, PN_stdfloat max_u,
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int min_y, int max_y, PN_stdfloat min_v, PN_stdfloat max_v,
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int min_z, int max_z, PN_stdfloat min_w, PN_stdfloat max_w) const;
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void accum_filter_y(LColor &color, PN_stdfloat &net, int zi,
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int min_x, int max_x, PN_stdfloat min_u, PN_stdfloat max_u,
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int min_y, int max_y, PN_stdfloat min_v, PN_stdfloat max_v,
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PN_stdfloat weight) const;
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void accum_filter_x(LColor &color, PN_stdfloat &net, int yi, int zi,
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int min_x, int max_x, PN_stdfloat min_u, PN_stdfloat max_u,
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PN_stdfloat weight) const;
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void accum_texel(LColor &color, PN_stdfloat &net, const unsigned char *&p,
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PN_stdfloat weight) const;
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typedef double GetComponentFunc(const unsigned char *&p);
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typedef void GetTexelFunc(LColor &color, const unsigned char *&p,
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GetComponentFunc *get_component);
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static void get_texel_r(LColor &color, const unsigned char *&p, GetComponentFunc *get_component);
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static void get_texel_g(LColor &color, const unsigned char *&p, GetComponentFunc *get_component);
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static void get_texel_b(LColor &color, const unsigned char *&p, GetComponentFunc *get_component);
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static void get_texel_a(LColor &color, const unsigned char *&p, GetComponentFunc *get_component);
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static void get_texel_l(LColor &color, const unsigned char *&p, GetComponentFunc *get_component);
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static void get_texel_la(LColor &color, const unsigned char *&p, GetComponentFunc *get_component);
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static void get_texel_rg(LColor &color, const unsigned char *&p, GetComponentFunc *get_component);
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static void get_texel_rgb(LColor &color, const unsigned char *&p, GetComponentFunc *get_component);
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static void get_texel_rgba(LColor &color, const unsigned char *&p, GetComponentFunc *get_component);
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static void get_texel_srgb(LColor &color, const unsigned char *&p, GetComponentFunc *get_component);
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static void get_texel_srgba(LColor &color, const unsigned char *&p, GetComponentFunc *get_component);
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int _x_size;
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int _y_size;
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int _z_size;
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int _component_width;
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int _num_components;
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int _pixel_width;
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Texture::Format _format;
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Texture::ComponentType _component_type;
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CPTA_uchar _image;
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GetComponentFunc *_get_component;
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GetTexelFunc *_get_texel;
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friend class Texture;
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};
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#include "texturePeeker.I"
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#endif
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