49f77fff14
Save in a few special cases, _X_EXPORT should not be used in C source files. Instead, it should be used in headers, and the proper C source include that header. Some special cases are symbols that need to be shared between modules, but not expected to be used by external drivers, and symbols that are accessible via LoaderSymbol/dlopen. This patch also adds conditionally some new sdk header files, depending on extensions enabled. These files were added to match pattern for other extensions/modules, that is, have the headers "deciding" symbol visibility in the sdk. These headers are: o Xext/panoramiXsrv.h, Xext/panoramiX.h o fbpict.h (unconditionally) o vidmodeproc.h o mioverlay.h (unconditionally, used only by xaa) o xfixes.h (unconditionally, symbols required by dri2) LoaderSymbol and similar functions now don't have different prototypes, in loaderProcs.h and xf86Module.h, so that both headers can be included, without the need of defining IN_LOADER. xf86NewInputDevice() device prototype readded to xf86Xinput.h, but not exported (and with a comment about it).
106 lines
3.2 KiB
C
106 lines
3.2 KiB
C
/*
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* Copyright © 2004 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef _RENDEREDGE_H_
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#define _RENDEREDGE_H_
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#include "picturestr.h"
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#define MAX_ALPHA(n) ((1 << (n)) - 1)
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#define N_Y_FRAC(n) ((n) == 1 ? 1 : (1 << ((n)/2)) - 1)
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#define N_X_FRAC(n) ((1 << ((n)/2)) + 1)
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#define STEP_Y_SMALL(n) (xFixed1 / N_Y_FRAC(n))
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#define STEP_Y_BIG(n) (xFixed1 - (N_Y_FRAC(n) - 1) * STEP_Y_SMALL(n))
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#define Y_FRAC_FIRST(n) (STEP_Y_SMALL(n) / 2)
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#define Y_FRAC_LAST(n) (Y_FRAC_FIRST(n) + (N_Y_FRAC(n) - 1) * STEP_Y_SMALL(n))
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#define STEP_X_SMALL(n) (xFixed1 / N_X_FRAC(n))
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#define STEP_X_BIG(n) (xFixed1 - (N_X_FRAC(n) - 1) * STEP_X_SMALL(n))
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#define X_FRAC_FIRST(n) (STEP_X_SMALL(n) / 2)
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#define X_FRAC_LAST(n) (X_FRAC_FIRST(n) + (N_X_FRAC(n) - 1) * STEP_X_SMALL(n))
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#define RenderSamplesX(x,n) ((n) == 1 ? 0 : (xFixedFrac (x) + X_FRAC_FIRST(n)) / STEP_X_SMALL(n))
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/*
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* An edge structure. This represents a single polygon edge
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* and can be quickly stepped across small or large gaps in the
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* sample grid
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*/
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typedef pixman_edge_t RenderEdge;
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/*
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* Step across a small sample grid gap
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*/
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#define RenderEdgeStepSmall(edge) { \
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edge->x += edge->stepx_small; \
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edge->e += edge->dx_small; \
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if (edge->e > 0) \
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{ \
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edge->e -= edge->dy; \
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edge->x += edge->signdx; \
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} \
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}
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/*
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* Step across a large sample grid gap
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*/
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#define RenderEdgeStepBig(edge) { \
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edge->x += edge->stepx_big; \
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edge->e += edge->dx_big; \
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if (edge->e > 0) \
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{ \
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edge->e -= edge->dy; \
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edge->x += edge->signdx; \
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} \
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}
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extern _X_EXPORT xFixed
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RenderSampleCeilY (xFixed y, int bpp);
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extern _X_EXPORT xFixed
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RenderSampleFloorY (xFixed y, int bpp);
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extern _X_EXPORT void
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RenderEdgeStep (RenderEdge *e, int n);
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extern _X_EXPORT void
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RenderEdgeInit (RenderEdge *e,
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int bpp,
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xFixed y_start,
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xFixed x_top,
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xFixed y_top,
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xFixed x_bot,
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xFixed y_bot);
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extern _X_EXPORT void
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RenderLineFixedEdgeInit (RenderEdge *e,
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int bpp,
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xFixed y,
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xLineFixed *line,
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int x_off,
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int y_off);
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#endif /* _RENDEREDGE_H_ */
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