glGetTexParameterfv, glGetTexParameteriv − return texture parameter values
void glGetTexParameterfv( GLenum target,
GLenum pname, | |
GLfloat *params ) |
void glGetTexParameteriv( GLenum target,
GLenum pname, | |
GLint *params ) |
target |
Specifies the symbolic name of the target texture. GL_TEXTURE_1D,GL_TEXTURE_2D, and GL_TEXTURE_3D are accepted. | ||
pname |
Specifies the symbolic name of a texture parameter. GL_TEXTURE_MAG_FILTER, GL_TEXTURE_MIN_FILTER, GL_TEXTURE_MIN_LOD, GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, GL_TEXTURE_MAX_LEVEL, GL_TEXTURE_WRAP_S, GL_TEXTURE_WRAP_T, GL_TEXTURE_WRAP_R, GL_TEXTURE_BORDER_COLOR, GL_TEXTURE_PRIORITY, and GL_TEXTURE_RESIDENT are accepted. | ||
params |
Returns the texture parameters. |
glGetTexParameter returns in params the value or values of the texture parameter specified as pname. target defines the target texture, either GL_TEXTURE_1D, GL_TEXTURE_2D, or GL_TEXTURE_3D to specify one-, two-, or three-dimensional texturing. pname accepts the same symbols as glTexParameter, with the same interpretations:
GL_TEXTURE_MAG_FILTER |
Returns the single-valued texture magnification filter, a symbolic constant. The initial value is GL_LINEAR. | ||
GL_TEXTURE_MIN_FILTER |
Returns the single-valued texture minification filter, a symbolic constant. The initial value is GL_NEAREST_MIPMAP_LINEAR. | ||
GL_TEXTURE_MIN_LOD |
Returns the single-valued texture minimum level-of-detail value. The initial value is $-1000$. | ||
GL_TEXTURE_MAX_LOD |
Returns the single-valued texture maximum level-of-detail value. The initial value is 1000. | ||
GL_TEXTURE_BASE_LEVEL |
Returns the single-valued base texture mipmap level. The initial value is 0. | ||
GL_TEXTURE_MAX_LEVEL |
Returns the single-valued maximum texture mipmap array level. The initial value is 1000. | ||
GL_TEXTURE_WRAP_S |
Returns the single-valued wrapping function for texture coordinate $s$, a symbolic constant. The initial value is GL_REPEAT. | ||
GL_TEXTURE_WRAP_T |
Returns the single-valued wrapping function for texture coordinate $t$, a symbolic constant. The initial value is GL_REPEAT. | ||
GL_TEXTURE_WRAP_R |
Returns the single-valued wrapping function for texture coordinate $r$, a symbolic constant. The initial value is GL_REPEAT. | ||
GL_TEXTURE_BORDER_COLOR |
Returns four integer or floating-point numbers that comprise the RGBA color of the texture border. Floating-point values are returned in the range [0, 1]. Integer values are returned as a linear mapping of the internal floating-point representation such that 1.0 maps to the most positive representable integer and −1.0 maps to the most negative representable integer. The initial value is (0, 0, 0, 0). | ||
GL_TEXTURE_PRIORITY |
Returns the residence priority of the target texture (or the named texture bound to it). The initial value is 1. See glPrioritizeTextures. | ||
GL_TEXTURE_RESIDENT |
Returns the residence status of the target texture. If the value returned in params is GL_TRUE, the texture is resident in texture memory. See glAreTexturesResident. |
GL_TEXTURE_PRIORITY and GL_TEXTURE_RESIDENT are available only if the GL version is 1.1 or greater.
GL_TEXTURE_3D, GL_TEXTURE_MIN_LOD, GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, GL_TEXTURE_MAX_LEVEL, and GL_TEXTURE_WRAP_R are available only if the GL version is 1.2 or greater.
If an error is generated, no change is made to the contents of params.
GL_INVALID_ENUM is generated if target or pname is not an accepted value.
GL_INVALID_OPERATION is generated if glGetTexParameter is executed between the execution of glBegin and the corresponding execution of glEnd.
glAreTexturesResident(3G), glPrioritizeTextures(3G), glTexParameter(3G)
Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.
Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.
Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.
Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.
The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.
Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.
Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.
Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.