/*
* Mesa 3-D graphics library
- * Version: 6.5.2
*
* Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef MACROS_H
#define MACROS_H
+#include "util/macros.h"
+#include "util/u_math.h"
+#include "util/rounding.h"
#include "imports.h"
#define INT_TO_USHORT(i) ((i) < 0 ? 0 : ((GLushort) ((i) >> 15)))
#define UINT_TO_USHORT(i) ((i) < 0 ? 0 : ((GLushort) ((i) >> 16)))
#define UNCLAMPED_FLOAT_TO_USHORT(us, f) \
- us = ( (GLushort) F_TO_I( CLAMP((f), 0.0F, 1.0F) * 65535.0F) )
+ us = ( (GLushort) _mesa_lroundevenf( CLAMP((f), 0.0F, 1.0F) * 65535.0F) )
#define CLAMPED_FLOAT_TO_USHORT(us, f) \
- us = ( (GLushort) F_TO_I( (f) * 65535.0F) )
+ us = ( (GLushort) _mesa_lroundevenf( (f) * 65535.0F) )
#define UNCLAMPED_FLOAT_TO_SHORT(s, f) \
- s = ( (GLshort) F_TO_I( CLAMP((f), -1.0F, 1.0F) * 32767.0F) )
+ s = ( (GLshort) _mesa_lroundevenf( CLAMP((f), -1.0F, 1.0F) * 32767.0F) )
/***
*** UNCLAMPED_FLOAT_TO_UBYTE: clamp float to [0,1] and map to ubyte in [0,255]
*** CLAMPED_FLOAT_TO_UBYTE: map float known to be in [0,1] to ubyte in [0,255]
***/
-#if defined(USE_IEEE) && !defined(DEBUG)
-#define IEEE_0996 0x3f7f0000 /* 0.996 or so */
+#ifndef DEBUG
/* This function/macro is sensitive to precision. Test very carefully
* if you change it!
*/
-#define UNCLAMPED_FLOAT_TO_UBYTE(UB, F) \
+#define UNCLAMPED_FLOAT_TO_UBYTE(UB, FLT) \
do { \
fi_type __tmp; \
- __tmp.f = (F); \
+ __tmp.f = (FLT); \
if (__tmp.i < 0) \
UB = (GLubyte) 0; \
- else if (__tmp.i >= IEEE_0996) \
+ else if (__tmp.i >= IEEE_ONE) \
UB = (GLubyte) 255; \
else { \
__tmp.f = __tmp.f * (255.0F/256.0F) + 32768.0F; \
UB = (GLubyte) __tmp.i; \
} \
} while (0)
-#define CLAMPED_FLOAT_TO_UBYTE(UB, F) \
+#define CLAMPED_FLOAT_TO_UBYTE(UB, FLT) \
do { \
fi_type __tmp; \
- __tmp.f = (F) * (255.0F/256.0F) + 32768.0F; \
+ __tmp.f = (FLT) * (255.0F/256.0F) + 32768.0F; \
UB = (GLubyte) __tmp.i; \
} while (0)
#else
#define UNCLAMPED_FLOAT_TO_UBYTE(ub, f) \
- ub = ((GLubyte) F_TO_I(CLAMP((f), 0.0F, 1.0F) * 255.0F))
+ ub = ((GLubyte) _mesa_lroundevenf(CLAMP((f), 0.0F, 1.0F) * 255.0F))
#define CLAMPED_FLOAT_TO_UBYTE(ub, f) \
- ub = ((GLubyte) F_TO_I((f) * 255.0F))
+ ub = ((GLubyte) _mesa_lroundevenf((f) * 255.0F))
#endif
+static fi_type UINT_AS_UNION(GLuint u)
+{
+ fi_type tmp;
+ tmp.u = u;
+ return tmp;
+}
+
+static inline fi_type INT_AS_UNION(GLint i)
+{
+ fi_type tmp;
+ tmp.i = i;
+ return tmp;
+}
+
+static inline fi_type FLOAT_AS_UNION(GLfloat f)
+{
+ fi_type tmp;
+ tmp.f = f;
+ return tmp;
+}
+
+/**
+ * Convert a floating point value to an unsigned fixed point value.
+ *
+ * \param frac_bits The number of bits used to store the fractional part.
+ */
+static inline uint32_t
+U_FIXED(float value, uint32_t frac_bits)
+{
+ value *= (1 << frac_bits);
+ return value < 0.0f ? 0 : (uint32_t) value;
+}
+
+/**
+ * Convert a floating point value to an signed fixed point value.
+ *
+ * \param frac_bits The number of bits used to store the fractional part.
+ */
+static inline int32_t
+S_FIXED(float value, uint32_t frac_bits)
+{
+ return (int32_t) (value * (1 << frac_bits));
+}
/*@}*/
(a)[3] == (b)[3])
/** Test for equality (unsigned bytes) */
+static inline GLboolean
+TEST_EQ_4UBV(const GLubyte a[4], const GLubyte b[4])
+{
#if defined(__i386__)
-#define TEST_EQ_4UBV(DST, SRC) *((GLuint*)(DST)) == *((GLuint*)(SRC))
+ return *((const GLuint *) a) == *((const GLuint *) b);
#else
-#define TEST_EQ_4UBV(DST, SRC) TEST_EQ_4V(DST, SRC)
+ return TEST_EQ_4V(a, b);
#endif
+}
+
/** Copy a 4-element vector */
#define COPY_4V( DST, SRC ) \
} while (0)
/** Copy a 4-element unsigned byte vector */
+static inline void
+COPY_4UBV(GLubyte dst[4], const GLubyte src[4])
+{
#if defined(__i386__)
-#define COPY_4UBV(DST, SRC) \
-do { \
- *((GLuint*)(DST)) = *((GLuint*)(SRC)); \
-} while (0)
+ *((GLuint *) dst) = *((GLuint *) src);
#else
-/* The GLuint cast might fail if DST or SRC are not dword-aligned (RISC) */
-#define COPY_4UBV(DST, SRC) \
-do { \
- (DST)[0] = (SRC)[0]; \
- (DST)[1] = (SRC)[1]; \
- (DST)[2] = (SRC)[2]; \
- (DST)[3] = (SRC)[3]; \
-} while (0)
+ /* The GLuint cast might fail if DST or SRC are not dword-aligned (RISC) */
+ COPY_4V(dst, src);
#endif
-
-/**
- * Copy a 4-element float vector
- * memcpy seems to be most efficient
- */
-#define COPY_4FV( DST, SRC ) \
-do { \
- memcpy(DST, SRC, sizeof(GLfloat) * 4); \
-} while (0)
+}
/** Copy \p SZ elements into a 4-element vector */
#define COPY_SZ_4V(DST, SZ, SRC) \
(DST)[3] *= S; \
} while (0)
-/** Assignment */
-#define ASSIGN_4V( V, V0, V1, V2, V3 ) \
-do { \
- V[0] = V0; \
- V[1] = V1; \
- V[2] = V2; \
- V[3] = V3; \
-} while(0)
-
/*@}*/
/*@}*/
+/** Copy \p sz elements into a homegeneous (4-element) vector, giving
+ * default values to the remaining components.
+ * The default values are chosen based on \p type.
+ */
+static inline void
+COPY_CLEAN_4V_TYPE_AS_UNION(fi_type dst[4], int sz, const fi_type src[4],
+ GLenum type)
+{
+ switch (type) {
+ case GL_FLOAT:
+ ASSIGN_4V(dst, FLOAT_AS_UNION(0), FLOAT_AS_UNION(0),
+ FLOAT_AS_UNION(0), FLOAT_AS_UNION(1));
+ break;
+ case GL_INT:
+ ASSIGN_4V(dst, INT_AS_UNION(0), INT_AS_UNION(0),
+ INT_AS_UNION(0), INT_AS_UNION(1));
+ break;
+ case GL_UNSIGNED_INT:
+ ASSIGN_4V(dst, UINT_AS_UNION(0), UINT_AS_UNION(0),
+ UINT_AS_UNION(0), UINT_AS_UNION(1));
+ break;
+ default:
+ ASSIGN_4V(dst, FLOAT_AS_UNION(0), FLOAT_AS_UNION(0),
+ FLOAT_AS_UNION(0), FLOAT_AS_UNION(1)); /* silence warnings */
+ assert(!"Unexpected type in COPY_CLEAN_4V_TYPE_AS_UNION macro");
+ }
+ COPY_SZ_4V(dst, sz, src);
+}
/** \name Linear interpolation functions */
/*@{*/
-/** Clamp X to [MIN,MAX] */
-#define CLAMP( X, MIN, MAX ) ( (X)<(MIN) ? (MIN) : ((X)>(MAX) ? (MAX) : (X)) )
-
-/** Minimum of two values: */
-#define MIN2( A, B ) ( (A)<(B) ? (A) : (B) )
+static inline unsigned
+minify(unsigned value, unsigned levels)
+{
+ return MAX2(1, value >> levels);
+}
-/** Maximum of two values: */
-#define MAX2( A, B ) ( (A)>(B) ? (A) : (B) )
+/**
+ * Align a value up to an alignment value
+ *
+ * If \c value is not already aligned to the requested alignment value, it
+ * will be rounded up.
+ *
+ * \param value Value to be rounded
+ * \param alignment Alignment value to be used. This must be a power of two.
+ *
+ * \sa ROUND_DOWN_TO()
+ */
+static inline uintptr_t
+ALIGN(uintptr_t value, int32_t alignment)
+{
+ assert((alignment > 0) && _mesa_is_pow_two(alignment));
+ return (((value) + (alignment) - 1) & ~((alignment) - 1));
+}
-/** Minimum and maximum of three values: */
-#define MIN3( A, B, C ) ((A) < (B) ? MIN2(A, C) : MIN2(B, C))
-#define MAX3( A, B, C ) ((A) > (B) ? MAX2(A, C) : MAX2(B, C))
+/**
+ * Like ALIGN(), but works with a non-power-of-two alignment.
+ */
+static inline uintptr_t
+ALIGN_NPOT(uintptr_t value, int32_t alignment)
+{
+ assert(alignment > 0);
+ return (value + alignment - 1) / alignment * alignment;
+}
+/**
+ * Align a value down to an alignment value
+ *
+ * If \c value is not already aligned to the requested alignment value, it
+ * will be rounded down.
+ *
+ * \param value Value to be rounded
+ * \param alignment Alignment value to be used. This must be a power of two.
+ *
+ * \sa ALIGN()
+ */
+static inline uintptr_t
+ROUND_DOWN_TO(uintptr_t value, int32_t alignment)
+{
+ assert((alignment > 0) && _mesa_is_pow_two(alignment));
+ return ((value) & ~(alignment - 1));
+}
/** Cross product of two 3-element vectors */
static inline GLfloat
LEN_3FV(const GLfloat v[3])
{
- return SQRTF(LEN_SQUARED_3FV(v));
+ return sqrtf(LEN_SQUARED_3FV(v));
}
static inline GLfloat
LEN_2FV(const GLfloat v[2])
{
- return SQRTF(LEN_SQUARED_2FV(v));
+ return sqrtf(LEN_SQUARED_2FV(v));
}
{
GLfloat len = (GLfloat) LEN_SQUARED_3FV(v);
if (len) {
- len = INV_SQRTF(len);
+ len = 1.0f / sqrtf(len);
v[0] *= len;
v[1] *= len;
v[2] *= len;
}
-/** Compute ceiling of integer quotient of A divided by B. */
-#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
+/** Test two floats have opposite signs */
+static inline GLboolean
+DIFFERENT_SIGNS(GLfloat x, GLfloat y)
+{
+#ifdef _MSC_VER
+#pragma warning( push )
+#pragma warning( disable : 6334 ) /* sizeof operator applied to an expression with an operator may yield unexpected results */
+#endif
+ return signbit(x) != signbit(y);
+#ifdef _MSC_VER
+#pragma warning( pop )
+#endif
+}
/** casts to silence warnings with some compilers */
#define ENUM_TO_BOOLEAN(E) ((E) ? GL_TRUE : GL_FALSE)
+/* Stringify */
+#define STRINGIFY(x) #x
+
#endif
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