gfx_opengl_texture2.cc File Reference

2D texture class (OpenGL). More...

#include "base.hh"
#include "gfx.hh"
#include "gfx_opengl_texture.hh"
#include "gfx_opengl_texture2.hh"
#include "gfx_targa.hh"

Namespaces
namespace	gfx
Defines
#define	GFX_OPENGL_TEXTURE2_CC   1
#define	CODE_TEXTURE_GET_BYTE_CNT(FUNC_TEXEL_TO_BYTE_CNT)
Variables
static Texture::eMinFilter	gfx::DEFAULT_NON_MIPMAP_MIN_FILTER = Texture::eMinFilter_LINEAR
static Texture::eMagFilter	gfx::DEFAULT_NON_MIPMAP_MAG_FILTER = Texture::eMagFilter_LINEAR
static Texture::eMinFilter	gfx::DEFAULT_MIPMAP_MIN_FILTER = Texture::eMinFilter_LINEAR_MIPMAP_LINEAR
static Texture::eMagFilter	gfx::DEFAULT_MIPMAP_MAG_FILTER = Texture::eMagFilter_LINEAR

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Detailed Description

2D texture class (OpenGL).

Id

LastChangedDate

Author:

Jim E. Brooks http://www.palomino3d.org

External vs. internal textures: ------------------------------- External textures are the source. Internal textures are uploaded into the GPU memory. This naming accords with OpenGL glTexImage2D().

eTexelType vs. internal/external texel formats: ----------------------------------------------- The eTexelType passed around here applies to the "external format" which is the texture image in app-memory. The internal format is used in a narrow scope and isn't passed around. Both correlate to the two format args for glTexImage2D().

Optimizations: -------------- Texture memory is reduced by specifying RGB instead of RGBA (for the internal format) if a Targa image has no alpha channel.

---

Define Documentation

#define CODE_TEXTURE_GET_BYTE_CNT

(

FUNC_TEXEL_TO_BYTE_CNT

)

Value:

{                                                                       \
    CHECK_TEXTURE();                                                    \
    const uint byteCnt = FUNC_TEXEL_TO_BYTE_CNT( GetTexelCnt() );       \
    ASSERT( byteCnt > 0 );                                              \
    ASSERT( byteCnt <= MAX_TEXTURE_BYTES );                             \
    return byteCnt;                                                     \
}

Macro to compute byte count of texture image (internal or external).

#define GFX_OPENGL_TEXTURE2_CC   1

Palomino 3D Engine documents generated by doxygen 1.5.3 on Fri Nov 23 11:26:15 2007