diff options
Diffstat (limited to 'src/glu/mini/mipmap.c')
| -rw-r--r-- | src/glu/mini/mipmap.c | 764 |
1 files changed, 0 insertions, 764 deletions
diff --git a/src/glu/mini/mipmap.c b/src/glu/mini/mipmap.c deleted file mode 100644 index 97297729e78..00000000000 --- a/src/glu/mini/mipmap.c +++ /dev/null @@ -1,764 +0,0 @@ -/* $Id: mipmap.c,v 1.2 2003/08/22 20:11:43 brianp Exp $ */ - -/* - * Mesa 3-D graphics library - * Version: 3.4 - * Copyright (C) 1995-2000 Brian Paul - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Library General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Library General Public License for more details. - * - * You should have received a copy of the GNU Library General Public - * License along with this library; if not, write to the Free - * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - */ - - -#ifdef PC_HEADER -#include "all.h" -#else -#include <assert.h> -#include <math.h> -#include <stdio.h> -#include <stdlib.h> -#include "gluP.h" -#endif - - -/* - * Compute ceiling of integer quotient of A divided by B: - */ -#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 ) - - - -#ifdef EPSILON -#undef EPSILON -#endif -#define EPSILON 0.001 - - -/* To work around optimizer bug in MSVC4.1 */ -#if defined(__WIN32__) && !defined(OPENSTEP) -void -dummy(GLuint j, GLuint k) -{ -} -#else -#define dummy(J, K) -#endif - - -GLint GLAPIENTRY -gluScaleImage(GLenum format, - GLsizei widthin, GLsizei heightin, - GLenum typein, const void *datain, - GLsizei widthout, GLsizei heightout, - GLenum typeout, void *dataout) -{ - GLint components, i, j, k; - GLfloat *tempin, *tempout, f; - GLfloat sx, sy; - GLint unpackrowlength, unpackalignment, unpackskiprows, unpackskippixels; - GLint packrowlength, packalignment, packskiprows, packskippixels; - GLint sizein, sizeout; - GLint rowstride, rowlen; - - - /* Determine number of components per pixel */ - switch (format) { - case GL_COLOR_INDEX: - case GL_STENCIL_INDEX: - case GL_DEPTH_COMPONENT: - case GL_RED: - case GL_GREEN: - case GL_BLUE: - case GL_ALPHA: - case GL_LUMINANCE: - components = 1; - break; - case GL_LUMINANCE_ALPHA: - components = 2; - break; - case GL_RGB: - case GL_BGR: - components = 3; - break; - case GL_RGBA: - case GL_BGRA: -#ifdef GL_EXT_abgr - case GL_ABGR_EXT: -#endif - components = 4; - break; - default: - return GLU_INVALID_ENUM; - } - - /* Determine bytes per input datum */ - switch (typein) { - case GL_UNSIGNED_BYTE: - sizein = sizeof(GLubyte); - break; - case GL_BYTE: - sizein = sizeof(GLbyte); - break; - case GL_UNSIGNED_SHORT: - sizein = sizeof(GLushort); - break; - case GL_SHORT: - sizein = sizeof(GLshort); - break; - case GL_UNSIGNED_INT: - sizein = sizeof(GLuint); - break; - case GL_INT: - sizein = sizeof(GLint); - break; - case GL_FLOAT: - sizein = sizeof(GLfloat); - break; - case GL_BITMAP: - /* not implemented yet */ - default: - return GL_INVALID_ENUM; - } - - /* Determine bytes per output datum */ - switch (typeout) { - case GL_UNSIGNED_BYTE: - sizeout = sizeof(GLubyte); - break; - case GL_BYTE: - sizeout = sizeof(GLbyte); - break; - case GL_UNSIGNED_SHORT: - sizeout = sizeof(GLushort); - break; - case GL_SHORT: - sizeout = sizeof(GLshort); - break; - case GL_UNSIGNED_INT: - sizeout = sizeof(GLuint); - break; - case GL_INT: - sizeout = sizeof(GLint); - break; - case GL_FLOAT: - sizeout = sizeof(GLfloat); - break; - case GL_BITMAP: - /* not implemented yet */ - default: - return GL_INVALID_ENUM; - } - - /* Get glPixelStore state */ - glGetFloatv(GL_UNPACK_ROW_LENGTH, &f); unpackrowlength = (int)f; - glGetFloatv(GL_UNPACK_ALIGNMENT, &f); unpackalignment = (int)f; - glGetFloatv(GL_UNPACK_SKIP_ROWS, &f); unpackskiprows = (int)f; - glGetFloatv(GL_UNPACK_SKIP_PIXELS, &f); unpackskippixels = (int)f; - glGetFloatv(GL_PACK_ROW_LENGTH, &f); packrowlength = (int)f; - glGetFloatv(GL_PACK_ALIGNMENT, &f); packalignment = (int)f; - glGetFloatv(GL_PACK_SKIP_ROWS, &f); packskiprows = (int)f; - glGetFloatv(GL_PACK_SKIP_PIXELS, &f); packskippixels = (int)f; - - /* Allocate storage for intermediate images */ - tempin = (GLfloat *) malloc(widthin * heightin - * components * sizeof(GLfloat)); - if (!tempin) { - return GLU_OUT_OF_MEMORY; - } - tempout = (GLfloat *) malloc(widthout * heightout - * components * sizeof(GLfloat)); - if (!tempout) { - free(tempin); - return GLU_OUT_OF_MEMORY; - } - - - /* - * Unpack the pixel data and convert to floating point - */ - - if (unpackrowlength > 0) { - rowlen = unpackrowlength; - } - else { - rowlen = widthin; - } - if (sizein >= unpackalignment) { - rowstride = components * rowlen; - } - else { - rowstride = unpackalignment / sizein - * CEILING(components * rowlen * sizein, unpackalignment); - } - - switch (typein) { - case GL_UNSIGNED_BYTE: - k = 0; - for (i = 0; i < heightin; i++) { - GLubyte *ubptr = (GLubyte *) datain - + i * rowstride - + unpackskiprows * rowstride + unpackskippixels * components; - for (j = 0; j < widthin * components; j++) { - dummy(j, k); - tempin[k++] = (GLfloat) * ubptr++; - } - } - break; - case GL_BYTE: - k = 0; - for (i = 0; i < heightin; i++) { - GLbyte *bptr = (GLbyte *) datain - + i * rowstride - + unpackskiprows * rowstride + unpackskippixels * components; - for (j = 0; j < widthin * components; j++) { - dummy(j, k); - tempin[k++] = (GLfloat) * bptr++; - } - } - break; - case GL_UNSIGNED_SHORT: - k = 0; - for (i = 0; i < heightin; i++) { - GLushort *usptr = (GLushort *) datain - + i * rowstride - + unpackskiprows * rowstride + unpackskippixels * components; - for (j = 0; j < widthin * components; j++) { - dummy(j, k); - tempin[k++] = (GLfloat) * usptr++; - } - } - break; - case GL_SHORT: - k = 0; - for (i = 0; i < heightin; i++) { - GLshort *sptr = (GLshort *) datain - + i * rowstride - + unpackskiprows * rowstride + unpackskippixels * components; - for (j = 0; j < widthin * components; j++) { - dummy(j, k); - tempin[k++] = (GLfloat) * sptr++; - } - } - break; - case GL_UNSIGNED_INT: - k = 0; - for (i = 0; i < heightin; i++) { - GLuint *uiptr = (GLuint *) datain - + i * rowstride - + unpackskiprows * rowstride + unpackskippixels * components; - for (j = 0; j < widthin * components; j++) { - dummy(j, k); - tempin[k++] = (GLfloat) * uiptr++; - } - } - break; - case GL_INT: - k = 0; - for (i = 0; i < heightin; i++) { - GLint *iptr = (GLint *) datain - + i * rowstride - + unpackskiprows * rowstride + unpackskippixels * components; - for (j = 0; j < widthin * components; j++) { - dummy(j, k); - tempin[k++] = (GLfloat) * iptr++; - } - } - break; - case GL_FLOAT: - k = 0; - for (i = 0; i < heightin; i++) { - GLfloat *fptr = (GLfloat *) datain - + i * rowstride - + unpackskiprows * rowstride + unpackskippixels * components; - for (j = 0; j < widthin * components; j++) { - dummy(j, k); - tempin[k++] = *fptr++; - } - } - break; - default: - return GLU_INVALID_ENUM; - } - - - /* - * Scale the image! - */ - - if (widthout > 1) - sx = (GLfloat) (widthin - 1) / (GLfloat) (widthout - 1); - else - sx = (GLfloat) (widthin - 1); - if (heightout > 1) - sy = (GLfloat) (heightin - 1) / (GLfloat) (heightout - 1); - else - sy = (GLfloat) (heightin - 1); - -/*#define POINT_SAMPLE*/ -#ifdef POINT_SAMPLE - for (i = 0; i < heightout; i++) { - GLint ii = i * sy; - for (j = 0; j < widthout; j++) { - GLint jj = j * sx; - - GLfloat *src = tempin + (ii * widthin + jj) * components; - GLfloat *dst = tempout + (i * widthout + j) * components; - - for (k = 0; k < components; k++) { - *dst++ = *src++; - } - } - } -#else - if (sx < 1.0 && sy < 1.0) { - /* magnify both width and height: use weighted sample of 4 pixels */ - GLint i0, i1, j0, j1; - GLfloat alpha, beta; - GLfloat *src00, *src01, *src10, *src11; - GLfloat s1, s2; - GLfloat *dst; - - for (i = 0; i < heightout; i++) { - i0 = i * sy; - i1 = i0 + 1; - if (i1 >= heightin) - i1 = heightin - 1; -/* i1 = (i+1) * sy - EPSILON;*/ - alpha = i * sy - i0; - for (j = 0; j < widthout; j++) { - j0 = j * sx; - j1 = j0 + 1; - if (j1 >= widthin) - j1 = widthin - 1; -/* j1 = (j+1) * sx - EPSILON; */ - beta = j * sx - j0; - - /* compute weighted average of pixels in rect (i0,j0)-(i1,j1) */ - src00 = tempin + (i0 * widthin + j0) * components; - src01 = tempin + (i0 * widthin + j1) * components; - src10 = tempin + (i1 * widthin + j0) * components; - src11 = tempin + (i1 * widthin + j1) * components; - - dst = tempout + (i * widthout + j) * components; - - for (k = 0; k < components; k++) { - s1 = *src00++ * (1.0 - beta) + *src01++ * beta; - s2 = *src10++ * (1.0 - beta) + *src11++ * beta; - *dst++ = s1 * (1.0 - alpha) + s2 * alpha; - } - } - } - } - else { - /* shrink width and/or height: use an unweighted box filter */ - GLint i0, i1; - GLint j0, j1; - GLint ii, jj; - GLfloat sum, *dst; - - for (i = 0; i < heightout; i++) { - i0 = i * sy; - i1 = i0 + 1; - if (i1 >= heightin) - i1 = heightin - 1; -/* i1 = (i+1) * sy - EPSILON; */ - for (j = 0; j < widthout; j++) { - j0 = j * sx; - j1 = j0 + 1; - if (j1 >= widthin) - j1 = widthin - 1; -/* j1 = (j+1) * sx - EPSILON; */ - - dst = tempout + (i * widthout + j) * components; - - /* compute average of pixels in the rectangle (i0,j0)-(i1,j1) */ - for (k = 0; k < components; k++) { - sum = 0.0; - for (ii = i0; ii <= i1; ii++) { - for (jj = j0; jj <= j1; jj++) { - sum += *(tempin + (ii * widthin + jj) * components + k); - } - } - sum /= (j1 - j0 + 1) * (i1 - i0 + 1); - *dst++ = sum; - } - } - } - } -#endif - - - /* - * Return output image - */ - - if (packrowlength > 0) { - rowlen = packrowlength; - } - else { - rowlen = widthout; - } - if (sizeout >= packalignment) { - rowstride = components * rowlen; - } - else { - rowstride = packalignment / sizeout - * CEILING(components * rowlen * sizeout, packalignment); - } - - switch (typeout) { - case GL_UNSIGNED_BYTE: - k = 0; - for (i = 0; i < heightout; i++) { - GLubyte *ubptr = (GLubyte *) dataout - + i * rowstride - + packskiprows * rowstride + packskippixels * components; - for (j = 0; j < widthout * components; j++) { - dummy(j, k + i); - *ubptr++ = (GLubyte) tempout[k++]; - } - } - break; - case GL_BYTE: - k = 0; - for (i = 0; i < heightout; i++) { - GLbyte *bptr = (GLbyte *) dataout - + i * rowstride - + packskiprows * rowstride + packskippixels * components; - for (j = 0; j < widthout * components; j++) { - dummy(j, k + i); - *bptr++ = (GLbyte) tempout[k++]; - } - } - break; - case GL_UNSIGNED_SHORT: - k = 0; - for (i = 0; i < heightout; i++) { - GLushort *usptr = (GLushort *) dataout - + i * rowstride - + packskiprows * rowstride + packskippixels * components; - for (j = 0; j < widthout * components; j++) { - dummy(j, k + i); - *usptr++ = (GLushort) tempout[k++]; - } - } - break; - case GL_SHORT: - k = 0; - for (i = 0; i < heightout; i++) { - GLshort *sptr = (GLshort *) dataout - + i * rowstride - + packskiprows * rowstride + packskippixels * components; - for (j = 0; j < widthout * components; j++) { - dummy(j, k + i); - *sptr++ = (GLshort) tempout[k++]; - } - } - break; - case GL_UNSIGNED_INT: - k = 0; - for (i = 0; i < heightout; i++) { - GLuint *uiptr = (GLuint *) dataout - + i * rowstride - + packskiprows * rowstride + packskippixels * components; - for (j = 0; j < widthout * components; j++) { - dummy(j, k + i); - *uiptr++ = (GLuint) tempout[k++]; - } - } - break; - case GL_INT: - k = 0; - for (i = 0; i < heightout; i++) { - GLint *iptr = (GLint *) dataout - + i * rowstride - + packskiprows * rowstride + packskippixels * components; - for (j = 0; j < widthout * components; j++) { - dummy(j, k + i); - *iptr++ = (GLint) tempout[k++]; - } - } - break; - case GL_FLOAT: - k = 0; - for (i = 0; i < heightout; i++) { - GLfloat *fptr = (GLfloat *) dataout - + i * rowstride - + packskiprows * rowstride + packskippixels * components; - for (j = 0; j < widthout * components; j++) { - dummy(j, k + i); - *fptr++ = tempout[k++]; - } - } - break; - default: - return GLU_INVALID_ENUM; - } - - - /* free temporary image storage */ - free(tempin); - free(tempout); - - return 0; -} - - - -/* - * Return the largest k such that 2^k <= n. - */ -static GLint -ilog2(GLint n) -{ - GLint k; - - if (n <= 0) - return 0; - for (k = 0; n >>= 1; k++); - return k; -} - - - -/* - * Find the value nearest to n which is also a power of two. - */ -static GLint -round2(GLint n) -{ - GLint m; - - for (m = 1; m < n; m *= 2); - - /* m>=n */ - if (m - n <= n - m / 2) { - return m; - } - else { - return m / 2; - } -} - - -/* - * Given an pixel format and data type, return the number of bytes to - * store one pixel. - */ -static GLint -bytes_per_pixel(GLenum format, GLenum type) -{ - GLint n, m; - - switch (format) { - case GL_COLOR_INDEX: - case GL_STENCIL_INDEX: - case GL_DEPTH_COMPONENT: - case GL_RED: - case GL_GREEN: - case GL_BLUE: - case GL_ALPHA: - case GL_LUMINANCE: - n = 1; - break; - case GL_LUMINANCE_ALPHA: - n = 2; - break; - case GL_RGB: - case GL_BGR: - n = 3; - break; - case GL_RGBA: - case GL_BGRA: -#ifdef GL_EXT_abgr - case GL_ABGR_EXT: -#endif - n = 4; - break; - default: - n = 0; - } - - switch (type) { - case GL_UNSIGNED_BYTE: - m = sizeof(GLubyte); - break; - case GL_BYTE: - m = sizeof(GLbyte); - break; - case GL_BITMAP: - m = 1; - break; - case GL_UNSIGNED_SHORT: - m = sizeof(GLushort); - break; - case GL_SHORT: - m = sizeof(GLshort); - break; - case GL_UNSIGNED_INT: - m = sizeof(GLuint); - break; - case GL_INT: - m = sizeof(GLint); - break; - case GL_FLOAT: - m = sizeof(GLfloat); - break; - default: - m = 0; - } - - return n * m; -} - - - -/* - * WARNING: This function isn't finished and has never been tested!!!! - */ -GLint GLAPIENTRY -gluBuild1DMipmaps(GLenum target, GLint components, - GLsizei width, GLenum format, GLenum type, const void *data) -{ - return 0; -} - - - -GLint GLAPIENTRY -gluBuild2DMipmaps(GLenum target, GLint components, - GLsizei width, GLsizei height, GLenum format, - GLenum type, const void *data) -{ - GLint w, h; - GLint maxsize; - void *image, *newimage; - GLint neww, newh, level, bpp; - int error; - GLboolean done; - GLint retval = 0; - GLint unpackrowlength, unpackalignment, unpackskiprows, unpackskippixels; - GLint packrowlength, packalignment, packskiprows, packskippixels; - GLfloat f; - - if (width < 1 || height < 1) - return GLU_INVALID_VALUE; - - glGetFloatv(GL_MAX_TEXTURE_SIZE, &f); maxsize = (int)f; - - w = round2(width); - if (w > maxsize) { - w = maxsize; - } - h = round2(height); - if (h > maxsize) { - h = maxsize; - } - - bpp = bytes_per_pixel(format, type); - if (bpp == 0) { - /* probably a bad format or type enum */ - return GLU_INVALID_ENUM; - } - - /* Get current glPixelStore values */ - glGetFloatv(GL_UNPACK_ROW_LENGTH, &f); unpackrowlength = (int)f; - glGetFloatv(GL_UNPACK_ALIGNMENT, &f); unpackalignment = (int)f; - glGetFloatv(GL_UNPACK_SKIP_ROWS, &f); unpackskiprows = (int)f; - glGetFloatv(GL_UNPACK_SKIP_PIXELS, &f); unpackskippixels = (int)f; - glGetFloatv(GL_PACK_ROW_LENGTH, &f); packrowlength = (int)f; - glGetFloatv(GL_PACK_ALIGNMENT, &f); packalignment = (int)f; - glGetFloatv(GL_PACK_SKIP_ROWS, &f); packskiprows = (int)f; - glGetFloatv(GL_PACK_SKIP_PIXELS, &f); packskippixels = (int)f; - - /* set pixel packing */ - glPixelStorei(GL_PACK_ROW_LENGTH, 0); - glPixelStorei(GL_PACK_ALIGNMENT, 1); - glPixelStorei(GL_PACK_SKIP_ROWS, 0); - glPixelStorei(GL_PACK_SKIP_PIXELS, 0); - - done = GL_FALSE; - - if (w != width || h != height) { - /* must rescale image to get "top" mipmap texture image */ - image = malloc((w + 4) * h * bpp); - if (!image) { - return GLU_OUT_OF_MEMORY; - } - error = gluScaleImage(format, width, height, type, data, - w, h, type, image); - if (error) { - retval = error; - done = GL_TRUE; - } - } - else { - image = (void *) data; - } - - level = 0; - while (!done) { - if (image != data) { - /* set pixel unpacking */ - glPixelStorei(GL_UNPACK_ROW_LENGTH, 0); - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - glPixelStorei(GL_UNPACK_SKIP_ROWS, 0); - glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0); - } - - glTexImage2D(target, level, components, w, h, 0, format, type, image); - - if (w == 1 && h == 1) - break; - - neww = (w < 2) ? 1 : w / 2; - newh = (h < 2) ? 1 : h / 2; - newimage = malloc((neww + 4) * newh * bpp); - if (!newimage) { - return GLU_OUT_OF_MEMORY; - } - - error = gluScaleImage(format, w, h, type, image, - neww, newh, type, newimage); - if (error) { - retval = error; - done = GL_TRUE; - } - - if (image != data) { - free(image); - } - image = newimage; - - w = neww; - h = newh; - level++; - } - - if (image != data) { - free(image); - } - - /* Restore original glPixelStore state */ - glPixelStorei(GL_UNPACK_ROW_LENGTH, unpackrowlength); - glPixelStorei(GL_UNPACK_ALIGNMENT, unpackalignment); - glPixelStorei(GL_UNPACK_SKIP_ROWS, unpackskiprows); - glPixelStorei(GL_UNPACK_SKIP_PIXELS, unpackskippixels); - glPixelStorei(GL_PACK_ROW_LENGTH, packrowlength); - glPixelStorei(GL_PACK_ALIGNMENT, packalignment); - glPixelStorei(GL_PACK_SKIP_ROWS, packskiprows); - glPixelStorei(GL_PACK_SKIP_PIXELS, packskippixels); - - return retval; -} |