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mesa: reindent querymatrix.c
Use 3-space indents, not 4. Move some comments after the case statements. Acked-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Brian Paul
parent
be4e198be0
commit
97f6d50f72
1 changed files with 104 additions and 103 deletions
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@ -38,119 +38,120 @@
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#define FLOAT_TO_FIXED(x) ((GLfixed) ((x) * 65536.0))
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GLbitfield GLAPIENTRY _mesa_QueryMatrixxOES(GLfixed mantissa[16], GLint exponent[16])
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GLbitfield GLAPIENTRY
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_mesa_QueryMatrixxOES(GLfixed mantissa[16], GLint exponent[16])
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{
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GLfloat matrix[16];
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GLint tmp;
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GLenum currentMode = GL_FALSE;
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GLenum desiredMatrix = GL_FALSE;
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/* The bitfield returns 1 for each component that is invalid (i.e.
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* NaN or Inf). In case of error, everything is invalid.
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*/
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GLbitfield rv;
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register unsigned int i;
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unsigned int bit;
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GLfloat matrix[16];
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GLint tmp;
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GLenum currentMode = GL_FALSE;
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GLenum desiredMatrix = GL_FALSE;
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/* The bitfield returns 1 for each component that is invalid (i.e.
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* NaN or Inf). In case of error, everything is invalid.
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*/
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GLbitfield rv;
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register unsigned int i;
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unsigned int bit;
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/* This data structure defines the mapping between the current matrix
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* mode and the desired matrix identifier.
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*/
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static struct {
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GLenum currentMode;
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GLenum desiredMatrix;
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} modes[] = {
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{GL_MODELVIEW, GL_MODELVIEW_MATRIX},
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{GL_PROJECTION, GL_PROJECTION_MATRIX},
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{GL_TEXTURE, GL_TEXTURE_MATRIX},
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};
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/* This data structure defines the mapping between the current matrix
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* mode and the desired matrix identifier.
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*/
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static struct {
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GLenum currentMode;
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GLenum desiredMatrix;
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} modes[] = {
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{GL_MODELVIEW, GL_MODELVIEW_MATRIX},
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{GL_PROJECTION, GL_PROJECTION_MATRIX},
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{GL_TEXTURE, GL_TEXTURE_MATRIX},
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};
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/* Call Mesa to get the current matrix in floating-point form. First,
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* we have to figure out what the current matrix mode is.
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*/
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_mesa_GetIntegerv(GL_MATRIX_MODE, &tmp);
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currentMode = (GLenum) tmp;
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/* Call Mesa to get the current matrix in floating-point form. First,
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* we have to figure out what the current matrix mode is.
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*/
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_mesa_GetIntegerv(GL_MATRIX_MODE, &tmp);
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currentMode = (GLenum) tmp;
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/* The mode is either GL_FALSE, if for some reason we failed to query
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* the mode, or a given mode from the above table. Search for the
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* returned mode to get the desired matrix; if we don't find it,
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* we can return immediately, as _mesa_GetInteger() will have
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* logged the necessary error already.
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*/
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for (i = 0; i < sizeof(modes)/sizeof(modes[0]); i++) {
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if (modes[i].currentMode == currentMode) {
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desiredMatrix = modes[i].desiredMatrix;
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break;
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}
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}
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if (desiredMatrix == GL_FALSE) {
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/* Early error means all values are invalid. */
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return 0xffff;
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}
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/* The mode is either GL_FALSE, if for some reason we failed to query
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* the mode, or a given mode from the above table. Search for the
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* returned mode to get the desired matrix; if we don't find it,
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* we can return immediately, as _mesa_GetInteger() will have
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* logged the necessary error already.
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*/
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for (i = 0; i < sizeof(modes)/sizeof(modes[0]); i++) {
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if (modes[i].currentMode == currentMode) {
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desiredMatrix = modes[i].desiredMatrix;
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break;
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}
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}
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if (desiredMatrix == GL_FALSE) {
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/* Early error means all values are invalid. */
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return 0xffff;
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}
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/* Now pull the matrix itself. */
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_mesa_GetFloatv(desiredMatrix, matrix);
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/* Now pull the matrix itself. */
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_mesa_GetFloatv(desiredMatrix, matrix);
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rv = 0;
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for (i = 0, bit = 1; i < 16; i++, bit<<=1) {
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float normalizedFraction;
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int exp;
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rv = 0;
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for (i = 0, bit = 1; i < 16; i++, bit<<=1) {
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float normalizedFraction;
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int exp;
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switch (fpclassify(matrix[i])) {
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/* A "subnormal" or denormalized number is too small to be
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* represented in normal format; but despite that it's a
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* valid floating point number. FP_ZERO and FP_NORMAL
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* are both valid as well. We should be fine treating
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* these three cases as legitimate floating-point numbers.
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*/
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case FP_SUBNORMAL:
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case FP_NORMAL:
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case FP_ZERO:
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normalizedFraction = (GLfloat)frexp(matrix[i], &exp);
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mantissa[i] = FLOAT_TO_FIXED(normalizedFraction);
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exponent[i] = (GLint) exp;
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break;
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switch (fpclassify(matrix[i])) {
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case FP_SUBNORMAL:
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case FP_NORMAL:
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case FP_ZERO:
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/* A "subnormal" or denormalized number is too small to be
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* represented in normal format; but despite that it's a
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* valid floating point number. FP_ZERO and FP_NORMAL
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* are both valid as well. We should be fine treating
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* these three cases as legitimate floating-point numbers.
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*/
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normalizedFraction = (GLfloat)frexp(matrix[i], &exp);
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mantissa[i] = FLOAT_TO_FIXED(normalizedFraction);
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exponent[i] = (GLint) exp;
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break;
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/* If the entry is not-a-number or an infinity, then the
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* matrix component is invalid. The invalid flag for
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* the component is already set; might as well set the
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* other return values to known values. We'll set
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* distinct values so that a savvy end user could determine
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* whether the matrix component was a NaN or an infinity,
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* but this is more useful for debugging than anything else
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* since the standard doesn't specify any such magic
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* values to return.
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*/
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case FP_NAN:
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mantissa[i] = INT_TO_FIXED(0);
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exponent[i] = (GLint) 0;
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rv |= bit;
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break;
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case FP_NAN:
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/* If the entry is not-a-number or an infinity, then the
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* matrix component is invalid. The invalid flag for
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* the component is already set; might as well set the
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* other return values to known values. We'll set
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* distinct values so that a savvy end user could determine
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* whether the matrix component was a NaN or an infinity,
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* but this is more useful for debugging than anything else
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* since the standard doesn't specify any such magic
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* values to return.
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*/
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mantissa[i] = INT_TO_FIXED(0);
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exponent[i] = (GLint) 0;
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rv |= bit;
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break;
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case FP_INFINITE:
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/* Return +/- 1 based on whether it's a positive or
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* negative infinity.
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*/
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if (matrix[i] > 0) {
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mantissa[i] = INT_TO_FIXED(1);
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}
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else {
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mantissa[i] = -INT_TO_FIXED(1);
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}
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exponent[i] = (GLint) 0;
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rv |= bit;
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break;
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case FP_INFINITE:
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/* Return +/- 1 based on whether it's a positive or
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* negative infinity.
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*/
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if (matrix[i] > 0) {
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mantissa[i] = INT_TO_FIXED(1);
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}
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else {
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mantissa[i] = -INT_TO_FIXED(1);
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}
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exponent[i] = (GLint) 0;
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rv |= bit;
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break;
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/* We should never get here; but here's a catching case
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* in case fpclassify() is returnings something unexpected.
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*/
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default:
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mantissa[i] = INT_TO_FIXED(2);
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exponent[i] = (GLint) 0;
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rv |= bit;
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break;
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}
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default:
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/* We should never get here; but here's a catching case
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* in case fpclassify() is returnings something unexpected.
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*/
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mantissa[i] = INT_TO_FIXED(2);
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exponent[i] = (GLint) 0;
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rv |= bit;
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break;
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}
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} /* for each component */
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} /* for each component */
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/* All done */
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return rv;
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/* All done */
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return rv;
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}
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