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+/*
+ *
+ * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Keith Packard not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission. Keith Packard makes no
+ * representations about the suitability of this software for any purpose. It
+ * is provided "as is" without express or implied warranty.
+ *
+ * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#ifndef _FBPICT_H_
+#define _FBPICT_H_
+
+#include "renderedge.h"
+
+
+#if defined(__GNUC__)
+#define INLINE __inline__
+#else
+#define INLINE
+#endif
+
+#define FbIntMult(a,b,t) ( (t) = (a) * (b) + 0x80, ( ( ( (t)>>8 ) + (t) )>>8 ) )
+#define FbIntDiv(a,b) (((CARD16) (a) * 255) / (b))
+
+#define FbGet8(v,i) ((CARD16) (CARD8) ((v) >> i))
+
+/*
+ * There are two ways of handling alpha -- either as a single unified value or
+ * a separate value for each component, hence each macro must have two
+ * versions. The unified alpha version has a 'U' at the end of the name,
+ * the component version has a 'C'. Similarly, functions which deal with
+ * this difference will have two versions using the same convention.
+ */
+
+#define FbOverU(x,y,i,a,t) ((t) = FbIntMult(FbGet8(y,i),(a),(t)) + FbGet8(x,i),\
+ (CARD32) ((CARD8) ((t) | (0 - ((t) >> 8)))) << (i))
+
+#define FbOverC(x,y,i,a,t) ((t) = FbIntMult(FbGet8(y,i),FbGet8(a,i),(t)) + FbGet8(x,i),\
+ (CARD32) ((CARD8) ((t) | (0 - ((t) >> 8)))) << (i))
+
+#define FbInU(x,i,a,t) ((CARD32) FbIntMult(FbGet8(x,i),(a),(t)) << (i))
+
+#define FbInC(x,i,a,t) ((CARD32) FbIntMult(FbGet8(x,i),FbGet8(a,i),(t)) << (i))
+
+#define FbGen(x,y,i,ax,ay,t,u,v) ((t) = (FbIntMult(FbGet8(y,i),ay,(u)) + \
+ FbIntMult(FbGet8(x,i),ax,(v))),\
+ (CARD32) ((CARD8) ((t) | \
+ (0 - ((t) >> 8)))) << (i))
+
+#define FbAdd(x,y,i,t) ((t) = FbGet8(x,i) + FbGet8(y,i), \
+ (CARD32) ((CARD8) ((t) | (0 - ((t) >> 8)))) << (i))
+
+
+#define Alpha(x) ((x) >> 24)
+#define Red(x) (((x) >> 16) & 0xff)
+#define Green(x) (((x) >> 8) & 0xff)
+#define Blue(x) ((x) & 0xff)
+
+/**
+ * Returns TRUE if the fbComposeGetSolid can be used to get a single solid
+ * color representing every source sampling location of the picture.
+ */
+static INLINE Bool
+fbCanGetSolid(PicturePtr pict)
+{
+ if (pict->pDrawable == NULL ||
+ pict->pDrawable->width != 1 ||
+ pict->pDrawable->height != 1)
+ {
+ return FALSE;
+ }
+ if (pict->repeat != RepeatNormal)
+ return FALSE;
+
+ switch (pict->format) {
+ case PICT_a8r8g8b8:
+ case PICT_x8r8g8b8:
+ case PICT_a8b8g8r8:
+ case PICT_x8b8g8r8:
+ case PICT_r8g8b8:
+ case PICT_b8g8r8:
+ case PICT_r5g6b5:
+ case PICT_b5g6r5:
+ return TRUE;
+ default:
+ return FALSE;
+ }
+}
+
+#define fbComposeGetSolid(pict, bits, fmt) { \
+ FbBits *__bits__; \
+ FbStride __stride__; \
+ int __bpp__; \
+ int __xoff__,__yoff__; \
+\
+ fbGetDrawable((pict)->pDrawable,__bits__,__stride__,__bpp__,__xoff__,__yoff__); \
+ switch (__bpp__) { \
+ case 32: \
+ (bits) = READ((CARD32 *) __bits__); \
+ break; \
+ case 24: \
+ (bits) = Fetch24 ((CARD8 *) __bits__); \
+ break; \
+ case 16: \
+ (bits) = READ((CARD16 *) __bits__); \
+ (bits) = cvt0565to0888(bits); \
+ break; \
+ case 8: \
+ (bits) = READ((CARD8 *) __bits__); \
+ (bits) = (bits) << 24; \
+ break; \
+ case 1: \
+ (bits) = READ((CARD32 *) __bits__); \
+ (bits) = FbLeftStipBits((bits),1) ? 0xff000000 : 0x00000000;\
+ break; \
+ default: \
+ return; \
+ } \
+ /* If necessary, convert RGB <--> BGR. */ \
+ if (PICT_FORMAT_TYPE((pict)->format) != PICT_FORMAT_TYPE(fmt)) \
+ { \
+ (bits) = (((bits) & 0xff000000) | \
+ (((bits) & 0x00ff0000) >> 16) | \
+ (((bits) & 0x0000ff00) >> 0) | \
+ (((bits) & 0x000000ff) << 16)); \
+ } \
+ /* manage missing src alpha */ \
+ if ((pict)->pFormat->direct.alphaMask == 0) \
+ (bits) |= 0xff000000; \
+ fbFinishAccess ((pict)->pDrawable); \
+}
+
+#define fbComposeGetStart(pict,x,y,type,stride,line,mul) {\
+ FbBits *__bits__; \
+ FbStride __stride__; \
+ int __bpp__; \
+ int __xoff__,__yoff__; \
+\
+ fbGetDrawable((pict)->pDrawable,__bits__,__stride__,__bpp__,__xoff__,__yoff__); \
+ (stride) = __stride__ * sizeof (FbBits) / sizeof (type); \
+ (line) = ((type *) __bits__) + (stride) * ((y) + __yoff__) + (mul) * ((x) + __xoff__); \
+}
+#define cvt8888to0565(s) ((((s) >> 3) & 0x001f) | \
+ (((s) >> 5) & 0x07e0) | \
+ (((s) >> 8) & 0xf800))
+#define cvt0565to0888(s) (((((s) << 3) & 0xf8) | (((s) >> 2) & 0x7)) | \
+ ((((s) << 5) & 0xfc00) | (((s) >> 1) & 0x300)) | \
+ ((((s) << 8) & 0xf80000) | (((s) << 3) & 0x70000)))
+
+#if IMAGE_BYTE_ORDER == MSBFirst
+#define Fetch24(a) ((unsigned long) (a) & 1 ? \
+ ((READ(a) << 16) | READ((CARD16 *) ((a)+1))) : \
+ ((READ((CARD16 *) (a)) << 8) | READ((a)+2)))
+#define Store24(a,v) ((unsigned long) (a) & 1 ? \
+ (WRITE(a, (CARD8) ((v) >> 16)), \
+ WRITE((CARD16 *) ((a)+1), (CARD16) (v))) : \
+ (WRITE((CARD16 *) (a), (CARD16) ((v) >> 8)), \
+ WRITE((a)+2, (CARD8) (v))))
+#else
+#define Fetch24(a) ((unsigned long) (a) & 1 ? \
+ (READ(a) | (READ((CARD16 *) ((a)+1)) << 8)) : \
+ (READ((CARD16 *) (a)) | (READ((a)+2) << 16)))
+#define Store24(a,v) ((unsigned long) (a) & 1 ? \
+ (WRITE(a, (CARD8) (v)), \
+ WRITE((CARD16 *) ((a)+1), (CARD16) ((v) >> 8))) : \
+ (WRITE((CARD16 *) (a), (CARD16) (v)),\
+ WRITE((a)+2, (CARD8) ((v) >> 16))))
+#endif
+
+/*
+ The methods below use some tricks to be able to do two color
+ components at the same time.
+*/
+
+/*
+ x_c = (x_c * a) / 255
+*/
+#define FbByteMul(x, a) do { \
+ CARD32 t = ((x & 0xff00ff) * a) + 0x800080; \
+ t = (t + ((t >> 8) & 0xff00ff)) >> 8; \
+ t &= 0xff00ff; \
+ \
+ x = (((x >> 8) & 0xff00ff) * a) + 0x800080; \
+ x = (x + ((x >> 8) & 0xff00ff)); \
+ x &= 0xff00ff00; \
+ x += t; \
+ } while (0)
+
+/*
+ x_c = (x_c * a) / 255 + y
+*/
+#define FbByteMulAdd(x, a, y) do { \
+ CARD32 t = ((x & 0xff00ff) * a) + 0x800080; \
+ t = (t + ((t >> 8) & 0xff00ff)) >> 8; \
+ t &= 0xff00ff; \
+ t += y & 0xff00ff; \
+ t |= 0x1000100 - ((t >> 8) & 0xff00ff); \
+ t &= 0xff00ff; \
+ \
+ x = (((x >> 8) & 0xff00ff) * a) + 0x800080; \
+ x = (x + ((x >> 8) & 0xff00ff)) >> 8; \
+ x &= 0xff00ff; \
+ x += (y >> 8) & 0xff00ff; \
+ x |= 0x1000100 - ((x >> 8) & 0xff00ff); \
+ x &= 0xff00ff; \
+ x <<= 8; \
+ x += t; \
+ } while (0)
+
+/*
+ x_c = (x_c * a + y_c * b) / 255
+*/
+#define FbByteAddMul(x, a, y, b) do { \
+ CARD32 t; \
+ CARD32 r = (x >> 24) * a + (y >> 24) * b + 0x80; \
+ r += (r >> 8); \
+ r >>= 8; \
+ \
+ t = (x & 0xff00) * a + (y & 0xff00) * b; \
+ t += (t >> 8) + 0x8000; \
+ t >>= 16; \
+ \
+ t |= r << 16; \
+ t |= 0x1000100 - ((t >> 8) & 0xff00ff); \
+ t &= 0xff00ff; \
+ t <<= 8; \
+ \
+ r = ((x >> 16) & 0xff) * a + ((y >> 16) & 0xff) * b + 0x80; \
+ r += (r >> 8); \
+ r >>= 8; \
+ \
+ x = (x & 0xff) * a + (y & 0xff) * b + 0x80; \
+ x += (x >> 8); \
+ x >>= 8; \
+ x |= r << 16; \
+ x |= 0x1000100 - ((x >> 8) & 0xff00ff); \
+ x &= 0xff00ff; \
+ x |= t; \
+} while (0)
+
+/*
+ x_c = (x_c * a + y_c *b) / 256
+*/
+#define FbByteAddMul_256(x, a, y, b) do { \
+ CARD32 t = (x & 0xff00ff) * a + (y & 0xff00ff) * b; \
+ t >>= 8; \
+ t &= 0xff00ff; \
+ \
+ x = ((x >> 8) & 0xff00ff) * a + ((y >> 8) & 0xff00ff) * b; \
+ x &= 0xff00ff00; \
+ x += t; \
+} while (0)
+/*
+ x_c = (x_c * a_c) / 255
+*/
+#define FbByteMulC(x, a) do { \
+ CARD32 t; \
+ CARD32 r = (x & 0xff) * (a & 0xff); \
+ r |= (x & 0xff0000) * ((a >> 16) & 0xff); \
+ r += 0x800080; \
+ r = (r + ((r >> 8) & 0xff00ff)) >> 8; \
+ r &= 0xff00ff; \
+ \
+ x >>= 8; \
+ t = (x & 0xff) * ((a >> 8) & 0xff); \
+ t |= (x & 0xff0000) * (a >> 24); \
+ t += 0x800080; \
+ t = t + ((t >> 8) & 0xff00ff); \
+ x = r | (t & 0xff00ff00); \
+ \
+ } while (0)
+
+/*
+ x_c = (x_c * a) / 255 + y
+*/
+#define FbByteMulAddC(x, a, y) do { \
+ CARD32 t; \
+ CARD32 r = (x & 0xff) * (a & 0xff); \
+ r |= (x & 0xff0000) * ((a >> 16) & 0xff); \
+ r += 0x800080; \
+ r = (r + ((r >> 8) & 0xff00ff)) >> 8; \
+ r &= 0xff00ff; \
+ r += y & 0xff00ff; \
+ r |= 0x1000100 - ((r >> 8) & 0xff00ff); \
+ r &= 0xff00ff; \
+ \
+ x >>= 8; \
+ t = (x & 0xff) * ((a >> 8) & 0xff); \
+ t |= (x & 0xff0000) * (a >> 24); \
+ t += 0x800080; \
+ t = (t + ((t >> 8) & 0xff00ff)) >> 8; \
+ t &= 0xff00ff; \
+ t += (y >> 8) & 0xff00ff; \
+ t |= 0x1000100 - ((t >> 8) & 0xff00ff); \
+ t &= 0xff00ff; \
+ x = r | (t << 8); \
+ } while (0)
+
+/*
+ x_c = (x_c * a_c + y_c * b) / 255
+*/
+#define FbByteAddMulC(x, a, y, b) do { \
+ CARD32 t; \
+ CARD32 r = (x >> 24) * (a >> 24) + (y >> 24) * b; \
+ r += (r >> 8) + 0x80; \
+ r >>= 8; \
+ \
+ t = (x & 0xff00) * ((a >> 8) & 0xff) + (y & 0xff00) * b; \
+ t += (t >> 8) + 0x8000; \
+ t >>= 16; \
+ \
+ t |= r << 16; \
+ t |= 0x1000100 - ((t >> 8) & 0xff00ff); \
+ t &= 0xff00ff; \
+ t <<= 8; \
+ \
+ r = ((x >> 16) & 0xff) * ((a >> 16) & 0xff) + ((y >> 16) & 0xff) * b + 0x80; \
+ r += (r >> 8); \
+ r >>= 8; \
+ \
+ x = (x & 0xff) * (a & 0xff) + (y & 0xff) * b + 0x80; \
+ x += (x >> 8); \
+ x >>= 8; \
+ x |= r << 16; \
+ x |= 0x1000100 - ((x >> 8) & 0xff00ff); \
+ x &= 0xff00ff; \
+ x |= t; \
+ } while (0)
+
+/*
+ x_c = min(x_c + y_c, 255)
+*/
+#define FbByteAdd(x, y) do { \
+ CARD32 t; \
+ CARD32 r = (x & 0xff00ff) + (y & 0xff00ff); \
+ r |= 0x1000100 - ((r >> 8) & 0xff00ff); \
+ r &= 0xff00ff; \
+ \
+ t = ((x >> 8) & 0xff00ff) + ((y >> 8) & 0xff00ff); \
+ t |= 0x1000100 - ((t >> 8) & 0xff00ff); \
+ r |= (t & 0xff00ff) << 8; \
+ x = r; \
+ } while (0)
+
+#define div_255(x) (((x) + 0x80 + (((x) + 0x80) >> 8)) >> 8)
+
+#if defined(__i386__) && defined(__GNUC__)
+#define FASTCALL __attribute__((regparm(3)))
+#else
+#define FASTCALL
+#endif
+
+typedef struct _FbComposeData {
+ CARD8 op;
+ PicturePtr src;
+ PicturePtr mask;
+ PicturePtr dest;
+ INT16 xSrc;
+ INT16 ySrc;
+ INT16 xMask;
+ INT16 yMask;
+ INT16 xDest;
+ INT16 yDest;
+ CARD16 width;
+ CARD16 height;
+} FbComposeData;
+
+void
+fbCompositeRect (const FbComposeData *data, CARD32 *scanline_buffer);
+
+typedef FASTCALL void (*CombineMaskU) (CARD32 *src, const CARD32 *mask, int width);
+typedef FASTCALL void (*CombineFuncU) (CARD32 *dest, const CARD32 *src, int width);
+typedef FASTCALL void (*CombineFuncC) (CARD32 *dest, CARD32 *src, CARD32 *mask, int width);
+
+typedef struct _FbComposeFunctions {
+ CombineFuncU *combineU;
+ CombineFuncC *combineC;
+ CombineMaskU combineMaskU;
+} FbComposeFunctions;
+
+/* fbcompose.c */
+
+void
+fbCompositeGeneral (CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pMask,
+ PicturePtr pDst,
+ INT16 xSrc,
+ INT16 ySrc,
+ INT16 xMask,
+ INT16 yMask,
+ INT16 xDst,
+ INT16 yDst,
+ CARD16 width,
+ CARD16 height);
+
+/* fbpict.c */
+void
+fbComposite (CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pMask,
+ PicturePtr pDst,
+ INT16 xSrc,
+ INT16 ySrc,
+ INT16 xMask,
+ INT16 yMask,
+ INT16 xDst,
+ INT16 yDst,
+ CARD16 width,
+ CARD16 height);
+
+typedef void (*CompositeFunc) (CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pMask,
+ PicturePtr pDst,
+ INT16 xSrc,
+ INT16 ySrc,
+ INT16 xMask,
+ INT16 yMask,
+ INT16 xDst,
+ INT16 yDst,
+ CARD16 width,
+ CARD16 height);
+
+void
+fbWalkCompositeRegion (CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pMask,
+ PicturePtr pDst,
+ INT16 xSrc,
+ INT16 ySrc,
+ INT16 xMask,
+ INT16 yMask,
+ INT16 xDst,
+ INT16 yDst,
+ CARD16 width,
+ CARD16 height,
+ Bool srcRepeat,
+ Bool maskRepeat,
+ CompositeFunc compositeRect);
+
+/* fbtrap.c */
+
+void
+fbAddTraps (PicturePtr pPicture,
+ INT16 xOff,
+ INT16 yOff,
+ int ntrap,
+ xTrap *traps);
+
+void
+fbRasterizeTrapezoid (PicturePtr alpha,
+ xTrapezoid *trap,
+ int x_off,
+ int y_off);
+
+void
+fbAddTriangles (PicturePtr pPicture,
+ INT16 xOff,
+ INT16 yOff,
+ int ntri,
+ xTriangle *tris);
+
+#endif /* _FBPICT_H_ */
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