diff options
Diffstat (limited to 'src/mesa/es/main')
| -rw-r--r-- | src/mesa/es/main/es_query_matrix.c | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/src/mesa/es/main/es_query_matrix.c b/src/mesa/es/main/es_query_matrix.c deleted file mode 100644 index 82b6fe7ab9..0000000000 --- a/src/mesa/es/main/es_query_matrix.c +++ /dev/null @@ -1,199 +0,0 @@ -/************************************************************************** - * - * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas. - * All Rights Reserved. - * - **************************************************************************/ - - -/** - * Code to implement GL_OES_query_matrix. See the spec at: - * http://www.khronos.org/registry/gles/extensions/OES/OES_query_matrix.txt - */ - - -#include <stdlib.h> -#include <math.h> -#include "GLES/gl.h" -#include "GLES/glext.h" - - -/** - * This is from the GL_OES_query_matrix extension specification: - * - * GLbitfield glQueryMatrixxOES( GLfixed mantissa[16], - * GLint exponent[16] ) - * mantissa[16] contains the contents of the current matrix in GLfixed - * format. exponent[16] contains the unbiased exponents applied to the - * matrix components, so that the internal representation of component i - * is close to mantissa[i] * 2^exponent[i]. The function returns a status - * word which is zero if all the components are valid. If - * status & (1<<i) != 0, the component i is invalid (e.g., NaN, Inf). - * The implementations are not required to keep track of overflows. In - * that case, the invalid bits are never set. - */ - -#define INT_TO_FIXED(x) ((GLfixed) ((x) << 16)) -#define FLOAT_TO_FIXED(x) ((GLfixed) ((x) * 65536.0)) - -#if defined(WIN32) || defined(_WIN32_WCE) -/* Oddly, the fpclassify() function doesn't exist in such a form - * on Windows. This is an implementation using slightly different - * lower-level Windows functions. - */ -#include <float.h> - -enum {FP_NAN, FP_INFINITE, FP_ZERO, FP_SUBNORMAL, FP_NORMAL} -fpclassify(double x) -{ - switch(_fpclass(x)) { - case _FPCLASS_SNAN: /* signaling NaN */ - case _FPCLASS_QNAN: /* quiet NaN */ - return FP_NAN; - case _FPCLASS_NINF: /* negative infinity */ - case _FPCLASS_PINF: /* positive infinity */ - return FP_INFINITE; - case _FPCLASS_NN: /* negative normal */ - case _FPCLASS_PN: /* positive normal */ - return FP_NORMAL; - case _FPCLASS_ND: /* negative denormalized */ - case _FPCLASS_PD: /* positive denormalized */ - return FP_SUBNORMAL; - case _FPCLASS_NZ: /* negative zero */ - case _FPCLASS_PZ: /* positive zero */ - return FP_ZERO; - default: - /* Should never get here; but if we do, this will guarantee - * that the pattern is not treated like a number. - */ - return FP_NAN; - } -} -#endif - -extern GLbitfield GL_APIENTRY _es_QueryMatrixxOES(GLfixed mantissa[16], GLint exponent[16]); - -/* The Mesa functions we'll need */ -extern void GL_APIENTRY _mesa_GetIntegerv(GLenum pname, GLint *params); -extern void GL_APIENTRY _mesa_GetFloatv(GLenum pname, GLfloat *params); - -GLbitfield GL_APIENTRY _es_QueryMatrixxOES(GLfixed mantissa[16], GLint exponent[16]) -{ - GLfloat matrix[16]; - GLint tmp; - GLenum currentMode = GL_FALSE; - GLenum desiredMatrix = GL_FALSE; - /* The bitfield returns 1 for each component that is invalid (i.e. - * NaN or Inf). In case of error, everything is invalid. - */ - GLbitfield rv; - register unsigned int i; - unsigned int bit; - - /* This data structure defines the mapping between the current matrix - * mode and the desired matrix identifier. - */ - static struct { - GLenum currentMode; - GLenum desiredMatrix; - } modes[] = { - {GL_MODELVIEW, GL_MODELVIEW_MATRIX}, - {GL_PROJECTION, GL_PROJECTION_MATRIX}, - {GL_TEXTURE, GL_TEXTURE_MATRIX}, -#if 0 - /* this doesn't exist in GLES */ - {GL_COLOR, GL_COLOR_MATRIX}, -#endif - }; - - /* Call Mesa to get the current matrix in floating-point form. First, - * we have to figure out what the current matrix mode is. - */ - _mesa_GetIntegerv(GL_MATRIX_MODE, &tmp); - currentMode = (GLenum) tmp; - - /* The mode is either GL_FALSE, if for some reason we failed to query - * the mode, or a given mode from the above table. Search for the - * returned mode to get the desired matrix; if we don't find it, - * we can return immediately, as _mesa_GetInteger() will have - * logged the necessary error already. - */ - for (i = 0; i < sizeof(modes)/sizeof(modes[0]); i++) { - if (modes[i].currentMode == currentMode) { - desiredMatrix = modes[i].desiredMatrix; - break; - } - } - if (desiredMatrix == GL_FALSE) { - /* Early error means all values are invalid. */ - return 0xffff; - } - - /* Now pull the matrix itself. */ - _mesa_GetFloatv(desiredMatrix, matrix); - - rv = 0; - for (i = 0, bit = 1; i < 16; i++, bit<<=1) { - float normalizedFraction; - int exp; - - switch (fpclassify(matrix[i])) { - /* A "subnormal" or denormalized number is too small to be - * represented in normal format; but despite that it's a - * valid floating point number. FP_ZERO and FP_NORMAL - * are both valid as well. We should be fine treating - * these three cases as legitimate floating-point numbers. - */ - case FP_SUBNORMAL: - case FP_NORMAL: - case FP_ZERO: - normalizedFraction = (GLfloat)frexp(matrix[i], &exp); - mantissa[i] = FLOAT_TO_FIXED(normalizedFraction); - exponent[i] = (GLint) exp; - break; - - /* If the entry is not-a-number or an infinity, then the - * matrix component is invalid. The invalid flag for - * the component is already set; might as well set the - * other return values to known values. We'll set - * distinct values so that a savvy end user could determine - * whether the matrix component was a NaN or an infinity, - * but this is more useful for debugging than anything else - * since the standard doesn't specify any such magic - * values to return. - */ - case FP_NAN: - mantissa[i] = INT_TO_FIXED(0); - exponent[i] = (GLint) 0; - rv |= bit; - break; - - case FP_INFINITE: - /* Return +/- 1 based on whether it's a positive or - * negative infinity. - */ - if (matrix[i] > 0) { - mantissa[i] = INT_TO_FIXED(1); - } - else { - mantissa[i] = -INT_TO_FIXED(1); - } - exponent[i] = (GLint) 0; - rv |= bit; - break; - - /* We should never get here; but here's a catching case - * in case fpclassify() is returnings something unexpected. - */ - default: - mantissa[i] = INT_TO_FIXED(2); - exponent[i] = (GLint) 0; - rv |= bit; - break; - } - - } /* for each component */ - - /* All done */ - return rv; -} |