compsize.c   [plain text]

/*
** License Applicability. Except to the extent portions of this file are
** made subject to an alternative license as permitted in the SGI Free
** Software License B, Version 1.1 (the "License"), the contents of this
** file are subject only to the provisions of the License. You may not use
** this file except in compliance with the License. You may obtain a copy
** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
** 
** http://oss.sgi.com/projects/FreeB
** 
** Note that, as provided in the License, the Software is distributed on an
** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
** 
** Original Code. The Original Code is: OpenGL Sample Implementation,
** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
** Copyright in any portions created by third parties is as indicated
** elsewhere herein. All Rights Reserved.
** 
** Additional Notice Provisions: The application programming interfaces
** established by SGI in conjunction with the Original Code are The
** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
** Window System(R) (Version 1.3), released October 19, 1998. This software
** was created using the OpenGL(R) version 1.2.1 Sample Implementation
** published by SGI, but has not been independently verified as being
** compliant with the OpenGL(R) version 1.2.1 Specification.
**
*/

#include <GL/gl.h>

GLint __glFogiv_size(GLenum pname)
{
    switch (pname) {
      case GL_FOG_COLOR:	return 4;
      case GL_FOG_DENSITY:	return 1;
      case GL_FOG_END:		return 1;
      case GL_FOG_MODE:		return 1;
      case GL_FOG_INDEX:	return 1;
      case GL_FOG_START:	return 1;
      default:
	return 0;
    }
}

GLint __glFogfv_size(GLenum pname)
{
    return __glFogiv_size(pname);
}

GLint __glCallLists_size(GLsizei n, GLenum type)
{
    GLint size;

    if (n < 0) return 0;
    switch (type) {
      case GL_BYTE:		size = 1; break;
      case GL_UNSIGNED_BYTE:	size = 1; break;
      case GL_SHORT:		size = 2; break;
      case GL_UNSIGNED_SHORT:	size = 2; break;
      case GL_INT:		size = 4; break;
      case GL_UNSIGNED_INT:	size = 4; break;
      case GL_FLOAT:		size = 4; break;
      case GL_2_BYTES:		size = 2; break;
      case GL_3_BYTES:		size = 3; break;
      case GL_4_BYTES:		size = 4; break;
      default:
	return 0;
    }
    return n * size;
}

GLint __glDrawPixels_size(GLenum format, GLenum type, GLsizei w, GLsizei h)
{
    GLint elements, esize;
    
    switch (format) {
      case GL_COLOR_INDEX:
      case GL_STENCIL_INDEX:
      case GL_DEPTH_COMPONENT:
	elements = 1;
	break;
      case GL_RED:
      case GL_GREEN:
      case GL_BLUE:
      case GL_ALPHA:
      case GL_LUMINANCE:
	elements = 1;
	break;
      case GL_LUMINANCE_ALPHA:
	elements = 2;
	break;
      case GL_RGB:
	elements = 3;
	break;
      case GL_RGBA:
      case GL_ABGR_EXT:
	elements = 4;
	break;
      default:
	return 0;
    }
    switch (type) {
      case GL_BITMAP:
	if (format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX) {
	    return (h * ((w+7)/8));
	} else {
	    return 0;
	}
      case GL_BYTE:
      case GL_UNSIGNED_BYTE:
	esize = 1;
	break;
      case GL_UNSIGNED_BYTE_3_3_2:
      case GL_UNSIGNED_BYTE_2_3_3_REV:
	esize = 1;
	elements = 1;
	break;
      case GL_SHORT:
      case GL_UNSIGNED_SHORT:
	esize = 2;
	break;
      case GL_UNSIGNED_SHORT_5_6_5:
      case GL_UNSIGNED_SHORT_5_6_5_REV:
      case GL_UNSIGNED_SHORT_4_4_4_4:
      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
      case GL_UNSIGNED_SHORT_5_5_5_1:
      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
	esize = 2;
	elements = 1;
	break;
      case GL_INT:
      case GL_UNSIGNED_INT:
      case GL_FLOAT:
	esize = 4;
	break;
      case GL_UNSIGNED_INT_8_8_8_8:
      case GL_UNSIGNED_INT_8_8_8_8_REV:
      case GL_UNSIGNED_INT_10_10_10_2:
      case GL_UNSIGNED_INT_2_10_10_10_REV:
	esize = 4;
	elements = 1;
	break;
      default:
	return 0;
    }
    return (elements * esize * w * h);
}

GLint __glBitmap_size(GLsizei w, GLsizei h)
{
    return __glDrawPixels_size(GL_COLOR_INDEX, GL_BITMAP, w, h);
}

GLint __glTexGendv_size(GLenum e)
{
    switch (e) {
      case GL_TEXTURE_GEN_MODE:
	return 1;
      case GL_OBJECT_PLANE:
      case GL_EYE_PLANE:
	return 4;
      default:
	return 0;
    }
}

GLint __glTexGenfv_size(GLenum e)
{
    return __glTexGendv_size(e);
}

GLint __glTexGeniv_size(GLenum e)
{
    return __glTexGendv_size(e);
}

GLint __glTexParameterfv_size(GLenum e)
{
    switch (e) {
      case GL_TEXTURE_WRAP_S:
      case GL_TEXTURE_WRAP_T:
      case GL_TEXTURE_WRAP_R:
      case GL_TEXTURE_MIN_FILTER:
      case GL_TEXTURE_MAG_FILTER:
	return 1;
      case GL_TEXTURE_BORDER_COLOR:
	return 4;
      case GL_TEXTURE_PRIORITY:
	return 1;
      case GL_TEXTURE_MIN_LOD:
      case GL_TEXTURE_MAX_LOD:
      case GL_TEXTURE_BASE_LEVEL:
      case GL_TEXTURE_MAX_LEVEL:
	return 1;
      default:
	return 0;
    }
}

GLint __glTexParameteriv_size(GLenum e)
{
    return __glTexParameterfv_size(e);
}

GLint __glTexEnvfv_size(GLenum e)
{
    switch (e) {
      case GL_TEXTURE_ENV_MODE:
	return 1;
      case GL_TEXTURE_ENV_COLOR:
	return 4;
      default:
	return 0;
    }
}

GLint __glTexEnviv_size(GLenum e)
{
    return __glTexEnvfv_size(e);
}

GLint __glTexImage1D_size(GLenum format, GLenum type, GLsizei w)
{
    GLint elements, esize;

    if (w < 0) return 0;
    switch (format) {
      case GL_COLOR_INDEX:
	elements = 1;
	break;
      case GL_RED:
      case GL_GREEN:
      case GL_BLUE:
      case GL_ALPHA:
      case GL_LUMINANCE:
	elements = 1;
	break;
      case GL_LUMINANCE_ALPHA:
	elements = 2;
	break;
      case GL_RGB:
	elements = 3;
	break;
      case GL_RGBA:
      case GL_ABGR_EXT:
	elements = 4;
	break;
      default:
	return 0;
    }
    switch (type) {
      case GL_BITMAP:
	if (format == GL_COLOR_INDEX) {
	    return (w+7)/8;
	} else {
	    return 0;
	}
      case GL_BYTE:
      case GL_UNSIGNED_BYTE:
	esize = 1;
	break;
      case GL_UNSIGNED_BYTE_3_3_2:
      case GL_UNSIGNED_BYTE_2_3_3_REV:
	esize = 1;
	elements = 1;
	break;
      case GL_SHORT:
      case GL_UNSIGNED_SHORT:
	esize = 2;
	break;
      case GL_UNSIGNED_SHORT_5_6_5:
      case GL_UNSIGNED_SHORT_5_6_5_REV:
      case GL_UNSIGNED_SHORT_4_4_4_4:
      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
      case GL_UNSIGNED_SHORT_5_5_5_1:
      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
	esize = 2;
	elements = 1;
	break;
      case GL_INT:
      case GL_UNSIGNED_INT:
      case GL_FLOAT:
	esize = 4;
	break;
      case GL_UNSIGNED_INT_8_8_8_8:
      case GL_UNSIGNED_INT_8_8_8_8_REV:
      case GL_UNSIGNED_INT_10_10_10_2:
      case GL_UNSIGNED_INT_2_10_10_10_REV:
	esize = 4;
	elements = 1;
	break;
      default:
	return 0;
    }
    return (elements * esize * w);
}

GLint __glTexImage2D_size(GLenum format, GLenum type, GLsizei w, GLsizei h)
{
    GLint elements, esize;

    if (w < 0) return 0;
    if (h < 0) return 0;
    switch (format) {
      case GL_COLOR_INDEX:
	elements = 1;
	break;
      case GL_RED:
      case GL_GREEN:
      case GL_BLUE:
      case GL_ALPHA:
      case GL_LUMINANCE:
	elements = 1;
	break;
      case GL_LUMINANCE_ALPHA:
	elements = 2;
	break;
      case GL_RGB:
	elements = 3;
	break;
      case GL_RGBA:
      case GL_ABGR_EXT:
	elements = 4;
	break;
      default:
	return 0;
    }
    switch (type) {
      case GL_BITMAP:
	if (format == GL_COLOR_INDEX) {
	    return (h * ((w+7)/8));
	} else {
	    return 0;
	}
      case GL_BYTE:
      case GL_UNSIGNED_BYTE:
	esize = 1;
	break;
      case GL_UNSIGNED_BYTE_3_3_2:
      case GL_UNSIGNED_BYTE_2_3_3_REV:
	esize = 1;
	elements = 1;
	break;
      case GL_SHORT:
      case GL_UNSIGNED_SHORT:
	esize = 2;
	break;
      case GL_UNSIGNED_SHORT_5_6_5:
      case GL_UNSIGNED_SHORT_5_6_5_REV:
      case GL_UNSIGNED_SHORT_4_4_4_4:
      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
      case GL_UNSIGNED_SHORT_5_5_5_1:
      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
	esize = 2;
	elements = 1;
	break;
      case GL_INT:
      case GL_UNSIGNED_INT:
      case GL_FLOAT:
	esize = 4;
	break;
      case GL_UNSIGNED_INT_8_8_8_8:
      case GL_UNSIGNED_INT_8_8_8_8_REV:
      case GL_UNSIGNED_INT_10_10_10_2:
      case GL_UNSIGNED_INT_2_10_10_10_REV:
	esize = 4;
	elements = 1;
	break;
      default:
	return 0;
    }
    return (elements * esize * w * h);
}

GLint __glTexImage3D_size(GLenum format, GLenum type, GLsizei w, GLsizei h,
			  GLsizei d)
{
    GLint elements, esize;

    if (w < 0) return 0;
    if (h < 0) return 0;
    if (d < 0) return 0;
    switch (format) {
      case GL_COLOR_INDEX:
	elements = 1;
	break;
      case GL_RED:
      case GL_GREEN:
      case GL_BLUE:
      case GL_ALPHA:
      case GL_LUMINANCE:
	elements = 1;
	break;
      case GL_LUMINANCE_ALPHA:
	elements = 2;
	break;
      case GL_RGB:
	elements = 3;
	break;
      case GL_RGBA:
      case GL_ABGR_EXT:
	elements = 4;
	break;
      default:
	return 0;
    }
    switch (type) {
      case GL_BITMAP:
	if (format == GL_COLOR_INDEX) {
	    return (d * (h * ((w+7)/8)));
	} else {
	    return 0;
	}
      case GL_BYTE:
      case GL_UNSIGNED_BYTE:
	esize = 1;
	break;
      case GL_UNSIGNED_BYTE_3_3_2:
      case GL_UNSIGNED_BYTE_2_3_3_REV:
	esize = 1;
	elements = 1;
	break;
      case GL_SHORT:
      case GL_UNSIGNED_SHORT:
	esize = 2;
	break;
      case GL_UNSIGNED_SHORT_5_6_5:
      case GL_UNSIGNED_SHORT_5_6_5_REV:
      case GL_UNSIGNED_SHORT_4_4_4_4:
      case GL_UNSIGNED_SHORT_4_4_4_4_REV:
      case GL_UNSIGNED_SHORT_5_5_5_1:
      case GL_UNSIGNED_SHORT_1_5_5_5_REV:
	esize = 2;
	elements = 1;
	break;
      case GL_INT:
      case GL_UNSIGNED_INT:
      case GL_FLOAT:
	esize = 4;
	break;
      case GL_UNSIGNED_INT_8_8_8_8:
      case GL_UNSIGNED_INT_8_8_8_8_REV:
      case GL_UNSIGNED_INT_10_10_10_2:
      case GL_UNSIGNED_INT_2_10_10_10_REV:
	esize = 4;
	elements = 1;
	break;
      default:
	return 0;
    }
    return (elements * esize * w * h * d);
}

GLint __glLightfv_size(GLenum pname)
{
    switch (pname) {
      case GL_SPOT_EXPONENT:		return 1;
      case GL_SPOT_CUTOFF:		return 1;
      case GL_AMBIENT:			return 4;
      case GL_DIFFUSE:			return 4;
      case GL_SPECULAR:			return 4;
      case GL_POSITION:			return 4;
      case GL_SPOT_DIRECTION:		return 3;
      case GL_CONSTANT_ATTENUATION:	return 1;
      case GL_LINEAR_ATTENUATION:	return 1;
      case GL_QUADRATIC_ATTENUATION:	return 1;
      default:
	return 0;
    }
}

GLint __glLightiv_size(GLenum pname)
{
    return __glLightfv_size(pname);
}

GLint __glLightModelfv_size(GLenum pname)
{
    switch (pname) {
      case GL_LIGHT_MODEL_AMBIENT:		return 4;
      case GL_LIGHT_MODEL_LOCAL_VIEWER:		return 1;
      case GL_LIGHT_MODEL_TWO_SIDE:		return 1;
      case GL_LIGHT_MODEL_COLOR_CONTROL:	return 1;
      default:
	return 0;
    }
}

GLint __glLightModeliv_size(GLenum pname)
{
    return __glLightModelfv_size(pname);
}

GLint __glMaterialfv_size(GLenum pname)
{
    switch (pname) {
      case GL_SHININESS:		return 1;
      case GL_EMISSION:			return 4;
      case GL_AMBIENT:			return 4;
      case GL_DIFFUSE:			return 4;
      case GL_SPECULAR:			return 4;
      case GL_AMBIENT_AND_DIFFUSE:	return 4;
      case GL_COLOR_INDEXES:		return 3;
      default:
	return 0;
    }
}

GLint __glMaterialiv_size(GLenum pname)
{
    return __glMaterialfv_size(pname);
}

GLint __glColorTableParameterfv_size(GLenum pname)
{
    switch (pname) {
      case GL_COLOR_TABLE_FORMAT:
      case GL_COLOR_TABLE_WIDTH:
      case GL_COLOR_TABLE_RED_SIZE:
      case GL_COLOR_TABLE_GREEN_SIZE:
      case GL_COLOR_TABLE_BLUE_SIZE:
      case GL_COLOR_TABLE_ALPHA_SIZE:
      case GL_COLOR_TABLE_LUMINANCE_SIZE:
      case GL_COLOR_TABLE_INTENSITY_SIZE:
	return 1;
      case GL_COLOR_TABLE_SCALE:
      case GL_COLOR_TABLE_BIAS:
	return 4;
      default:
	return -1;
    }
}

GLint __glColorTableParameteriv_size(GLenum pname)
{
    return __glColorTableParameterfv_size(pname);
}

GLint __glConvolutionParameterfv_size(GLenum pname)
{
    switch(pname) {
      case GL_CONVOLUTION_BORDER_MODE:
	return 1;
      case GL_CONVOLUTION_BORDER_COLOR:
      case GL_CONVOLUTION_FILTER_SCALE:
      case GL_CONVOLUTION_FILTER_BIAS:
	return 4;
      default: /* error: bad enum value */
	return -1;
    }
}

GLint __glConvolutionParameteriv_size(GLenum pname)
{
    return __glConvolutionParameterfv_size(pname);
}