📄 gettexparameter.html
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<HTML><BODY><PRE> <STRONG>NAME</STRONG> <STRONG>glGetTexParameterfv,</STRONG> <STRONG>glGetTexParameteriv</STRONG> - return texture parameter values <STRONG>C</STRONG> <STRONG>SPECIFICATION</STRONG> void <STRONG>glGetTexParameterfv</STRONG>( GLenum <EM>target</EM>, GLenum <EM>pname</EM>, GLfloat *<EM>params</EM> ) void <STRONG>glGetTexParameteriv</STRONG>( GLenum <EM>target</EM>, GLenum <EM>pname</EM>, GLint *<EM>params</EM> ) <STRONG>PARAMETERS</STRONG> <EM>target</EM> Specifies the symbolic name of the target texture. <STRONG>GL_TEXTURE_1D</STRONG> and <STRONG>GL_TEXTURE_2D</STRONG> are accepted. <EM>pname</EM> Specifies the symbolic name of a texture parameter. <STRONG>GL_TEXTURE_MAG_FILTER</STRONG>, <STRONG>GL_TEXTURE_MIN_FILTER</STRONG>, <STRONG>GL_TEXTURE_WRAP_S</STRONG>, <STRONG>GL_TEXTURE_WRAP_T</STRONG>, <STRONG>GL_TEXTURE_BORDER_COLOR</STRONG>, <STRONG>GL_TEXTURE_PRIORITY</STRONG>, and <STRONG>GL_TEXTURE_RESIDENT</STRONG> are accepted. <EM>params</EM> Returns the texture parameters. <STRONG>DESCRIPTION</STRONG> <STRONG>glGetTexParameter</STRONG> returns in <EM>params</EM> the value or values of the texture parameter specified as <EM>pname</EM>. <EM>target</EM> defines the target texture, either <STRONG>GL_TEXTURE_1D</STRONG> or <STRONG>GL_TEXTURE_2D</STRONG>, to specify one- or two-dimensional texturing. <EM>pname</EM> accepts the same symbols as <STRONG>glTexParameter</STRONG>, with the same interpretations: <STRONG>GL_TEXTURE_MAG_FILTER</STRONG> Returns the single-valued texture magnification filter, a symbolic constant. The initial value is <STRONG>GL_LINEAR</STRONG>. <STRONG>GL_TEXTURE_MIN_FILTER</STRONG> Returns the single-valued texture minification filter, a symbolic constant. The initial value is <STRONG>GL_NEAREST_MIPMAP_LINEAR</STRONG>. <STRONG>GL_TEXTURE_WRAP_S</STRONG> Returns the single-valued wrapping function for texture coordinate s, a symbolic constant. The initial value is <STRONG>GL_REPEAT</STRONG>. <STRONG>GL_TEXTURE_WRAP_T</STRONG> Returns the single-valued wrapping function for texture coordinate t, a symbolic constant. The initial value is <STRONG>GL_REPEAT</STRONG>. <STRONG>GL_TEXTURE_BORDER_COLOR</STRONG> 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). <STRONG>GL_TEXTURE_PRIORITY</STRONG> Returns the residence priority of the target texture (or the named texture bound to it). The initial value is 1. See <STRONG>glPrioritizeTextures</STRONG>. <STRONG>GL_TEXTURE_RESIDENT</STRONG> Returns the residence status of the target texture. If the value returned in <EM>params</EM> is <STRONG>GL_TRUE</STRONG>, the texture is resident in texture memory. See <STRONG>glAreTexturesResident</STRONG>. <STRONG>NOTES</STRONG> <STRONG>GL_TEXTURE_PRIORITY</STRONG> and <STRONG>GL_TEXTURE_RESIDENT</STRONG> are only available if the GL version is 1.1 or greater. If an error is generated, no change is made to the contents of <EM>params</EM>. <STRONG>ERRORS</STRONG> <STRONG>GL_INVALID_ENUM</STRONG> is generated if <EM>target</EM> or <EM>pname</EM> is not an accepted value. <STRONG>GL_INVALID_OPERATION</STRONG> is generated if <STRONG>glGetTexParameter</STRONG> is executed between the execution of <STRONG>glBegin</STRONG> and the corresponding execution of <STRONG>glEnd</STRONG>. <STRONG>SEE</STRONG> <STRONG>ALSO</STRONG> <STRONG>glAreTexturesResident</STRONG>, <STRONG>glPrioritizeTextures</STRONG>, <STRONG>glTexParameter</STRONG></PRE></BODY></HTML>⌨️ 快捷键说明
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