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publish Textures::up/down_to_power_2()

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This commit is contained in:
David Rose 2009-02-04 14:23:17 +00:00
parent aca2606187
commit 86409f66e4
2 changed files with 33 additions and 33 deletions
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60
panda/src/gobj/texture.cxx
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@ -1530,6 +1530,36 @@ prepare_now(PreparedGraphicsObjects *prepared_objects,
return tc; return tc;
} }
////////////////////////////////////////////////////////////////////
// Function: Texture::up_to_power_2
// Access: Published, Static
// Description: Returns the smallest power of 2 greater than or equal
// to value.
////////////////////////////////////////////////////////////////////
int Texture::
up_to_power_2(int value) {
if (value <= 1) {
return 1;
}
int bit = get_next_higher_bit(((unsigned int)value) - 1);
return (1 << bit);
}
////////////////////////////////////////////////////////////////////
// Function: Texture::down_to_power_2
// Access: Published, Static
// Description: Returns the largest power of 2 less than or equal
// to value.
////////////////////////////////////////////////////////////////////
int Texture::
down_to_power_2(int value) {
if (value <= 1) {
return 1;
}
int bit = get_next_higher_bit(((unsigned int)value) >> 1);
return (1 << bit);
}
//////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////
// Function: Texture::texture_uploaded // Function: Texture::texture_uploaded
@ -1660,36 +1690,6 @@ make_texture() {
return new Texture; return new Texture;
} }
////////////////////////////////////////////////////////////////////
// Function: Texture::up_to_power_2
// Access: Public, Static
// Description: Returns the smallest power of 2 greater than or equal
// to value.
////////////////////////////////////////////////////////////////////
int Texture::
up_to_power_2(int value) {
int x = 1;
while (x < value) {
x = (x << 1);
}
return x;
}
////////////////////////////////////////////////////////////////////
// Function: Texture::down_to_power_2
// Access: Public, Static
// Description: Returns the largest power of 2 less than or equal
// to value.
////////////////////////////////////////////////////////////////////
int Texture::
down_to_power_2(int value) {
int x = 1;
while ((x << 1) <= value) {
x = (x << 1);
}
return x;
}
//////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////
// Function: Texture::is_specific // Function: Texture::is_specific
// Access: Public, Static // Access: Public, Static

6
panda/src/gobj/texture.h
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@ -424,6 +424,9 @@ PUBLISHED:
TextureContext *prepare_now(PreparedGraphicsObjects *prepared_objects, TextureContext *prepare_now(PreparedGraphicsObjects *prepared_objects,
GraphicsStateGuardianBase *gsg); GraphicsStateGuardianBase *gsg);
static int up_to_power_2(int value);
static int down_to_power_2(int value);
public: public:
void texture_uploaded(GraphicsStateGuardianBase *gsg); void texture_uploaded(GraphicsStateGuardianBase *gsg);
@ -436,9 +439,6 @@ public:
static PT(Texture) make_texture(); static PT(Texture) make_texture();
public: public:
static int up_to_power_2(int value);
static int down_to_power_2(int value);
static bool is_specific(CompressionMode compression); static bool is_specific(CompressionMode compression);
static bool has_alpha(Format format); static bool has_alpha(Format format);
static bool has_binary_alpha(Format format); static bool has_binary_alpha(Format format);