HP b2600

C
glCopyTexImage2D
Chapter 3
77
glCopyTexImage2D
glCopyTexImage2D: copy pixels into a 2D texture image.
C Specification
C Specification
void glCopyTexImage2D(
GLenum target,
GLint level,
GLenum internalFormat,
GLint x,
GLint y,
GLsizei width,
GLsizei height,
GLint border)
Parameters
target Specifies the target texture. Must be GL_TEXTURE_2D.
level Specifies the level-of-detail number. Level 0 is the base image level.
Level n is the nth mipmap reduction image.
internalFormat Specifies the internal format of the texture. Must be one of the
following symbolic constants: GL_ALPHA, GL_ALPHA4,
GL_ALPHA8, GL_ALPHA12, GL_ALPHA16, GL_LUMINANCE,
GL_LUMINANCE4, GL_LUMINANCE8, GL_LUMINANCE12,
GL_LUMINANCE16, GL_LUMINANCE_ALPHA,
GL_LUMINANCE4_ALPHA4, GL_LUMINANCE6_ALPHA2,
GL_LUMINANCE8_ALPHA8, GL_LUMINANCE12_ALPHA4,
GL_LUMINANCE12_ALPHA12, GL_LUMINANCE16_ALPHA16,
GL_INTENSITY, GL_INTENSITY4, GL_INTENSITY8,
GL_INTENSITY12, GL_INTENSITY16, GL_RGB, GL_R3_G3_B2,
GL_RGB4, GL_RGB5, GL_RGB8, GL_RGB10, GL_RGB12,
GL_RGB16, GL_RGBA, GL_RGBA2, GL_RGBA4, GL_RGB5_A1,
GL_RGBA8, GL_RGB10_A2, GL_RGBA12, or GL_RGBA16.
Additionally, internalFormat may be one of the symbolic constants
GL_DEPTH_COMPONENT, GL_DEPTH_COMPONENT16_EXT,
GL_DEPTH_COMPONENT24_EXT, or
GL_DEPTH_COMPONENT32_EXT.
x, y Specify the window coordinates of the lower left corner of the
rectangular region of pixels to be copied.
width Specifies the width of the texture image. Must be 0 or 2
n
+ 2 × border
for some integer n.
height Specifies the height of the texture image. Must be 0 or 2
m
+ 2 × border
for some integer m.
border Specifies the width of the border. Must be either 0 or 1.