-/* $Id: s_masking.c,v 1.5 2001/03/19 02:25:36 keithw Exp $ */
-
/*
* Mesa 3-D graphics library
- * Version: 3.5
+ * Version: 6.5.2
*
- * Copyright (C) 1999-2001 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
*/
-#include "glheader.h"
-#include "enums.h"
-#include "macros.h"
+#include "main/glheader.h"
+#include "main/macros.h"
-#include "s_alphabuf.h"
#include "s_context.h"
#include "s_masking.h"
-#include "s_pb.h"
#include "s_span.h"
-/*
- * Apply glColorMask to a span of RGBA pixels.
+/**
+ * Apply the color mask to a span of rgba values.
*/
void
-_mesa_mask_rgba_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, GLchan rgba[][4] )
+_swrast_mask_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ SWspan *span)
{
- GLchan dest[MAX_WIDTH][4];
- GLuint i;
-
-#if CHAN_BITS == 8
-
- GLuint srcMask = *((GLuint*)ctx->Color.ColorMask);
- GLuint dstMask = ~srcMask;
- GLuint *rgba32 = (GLuint *) rgba;
- GLuint *dest32 = (GLuint *) dest;
-
- _mesa_read_rgba_span( ctx, ctx->DrawBuffer, n, x, y, dest );
- for (i = 0; i < n; i++) {
- rgba32[i] = (rgba32[i] & srcMask) | (dest32[i] & dstMask);
- }
-
-#else
-
- const GLint rMask = ctx->Color.ColorMask[RCOMP];
- const GLint gMask = ctx->Color.ColorMask[GCOMP];
- const GLint bMask = ctx->Color.ColorMask[BCOMP];
- const GLint aMask = ctx->Color.ColorMask[ACOMP];
-
- _mesa_read_rgba_span( ctx, ctx->DrawBuffer, n, x, y, dest );
- for (i = 0; i < n; i++) {
- if (!rMask) rgba[i][RCOMP] = dest[i][RCOMP];
- if (!gMask) rgba[i][GCOMP] = dest[i][GCOMP];
- if (!bMask) rgba[i][BCOMP] = dest[i][BCOMP];
- if (!aMask) rgba[i][ACOMP] = dest[i][ACOMP];
- }
-
-#endif
-}
-
-
-
-/*
- * Apply glColorMask to an array of RGBA pixels.
- */
-void
-_mesa_mask_rgba_pixels( GLcontext *ctx,
- GLuint n, const GLint x[], const GLint y[],
- GLchan rgba[][4], const GLubyte mask[] )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLchan dest[PB_SIZE][4];
- GLuint i;
-
-#if CHAN_BITS == 8
-
- GLuint srcMask = *((GLuint*)ctx->Color.ColorMask);
- GLuint dstMask = ~srcMask;
- GLuint *rgba32 = (GLuint *) rgba;
- GLuint *dest32 = (GLuint *) dest;
-
- (*swrast->Driver.ReadRGBAPixels)( ctx, n, x, y, dest, mask );
- if (SWRAST_CONTEXT(ctx)->_RasterMask & ALPHABUF_BIT) {
- _mesa_read_alpha_pixels( ctx, n, x, y, dest, mask );
- }
-
- for (i=0; i<n; i++) {
- rgba32[i] = (rgba32[i] & srcMask) | (dest32[i] & dstMask);
+ const GLuint n = span->end;
+ void *rbPixels;
+
+ ASSERT(n < MAX_WIDTH);
+ ASSERT(span->arrayMask & SPAN_RGBA);
+ ASSERT(rb->DataType == span->array->ChanType);
+
+ rbPixels = _swrast_get_dest_rgba(ctx, rb, span);
+
+ /*
+ * Do component masking.
+ * Note that we're not using span->array->mask[] here. We could...
+ */
+ if (span->array->ChanType == GL_UNSIGNED_BYTE) {
+ /* treat 4xGLubyte as 1xGLuint */
+ const GLuint srcMask = *((GLuint *) ctx->Color.ColorMask);
+ const GLuint dstMask = ~srcMask;
+ const GLuint *dst = (const GLuint *) rbPixels;
+ GLuint *src = (GLuint *) span->array->rgba8;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ src[i] = (src[i] & srcMask) | (dst[i] & dstMask);
+ }
}
-
-#else
-
- const GLint rMask = ctx->Color.ColorMask[RCOMP];
- const GLint gMask = ctx->Color.ColorMask[GCOMP];
- const GLint bMask = ctx->Color.ColorMask[BCOMP];
- const GLint aMask = ctx->Color.ColorMask[ACOMP];
-
- (*swrast->Driver.ReadRGBAPixels)( ctx, n, x, y, dest, mask );
- if (SWRAST_CONTEXT(ctx)->_RasterMask & ALPHABUF_BIT) {
- _mesa_read_alpha_pixels( ctx, n, x, y, dest, mask );
+ else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
+ /* 2-byte components */
+ /* XXX try to use 64-bit arithmetic someday */
+ const GLushort rMask = ctx->Color.ColorMask[RCOMP] ? 0xffff : 0x0;
+ const GLushort gMask = ctx->Color.ColorMask[GCOMP] ? 0xffff : 0x0;
+ const GLushort bMask = ctx->Color.ColorMask[BCOMP] ? 0xffff : 0x0;
+ const GLushort aMask = ctx->Color.ColorMask[ACOMP] ? 0xffff : 0x0;
+ const GLushort (*dst)[4] = (const GLushort (*)[4]) rbPixels;
+ GLushort (*src)[4] = span->array->rgba16;
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ src[i][RCOMP] = (src[i][RCOMP] & rMask) | (dst[i][RCOMP] & ~rMask);
+ src[i][GCOMP] = (src[i][GCOMP] & gMask) | (dst[i][GCOMP] & ~gMask);
+ src[i][BCOMP] = (src[i][BCOMP] & bMask) | (dst[i][BCOMP] & ~bMask);
+ src[i][ACOMP] = (src[i][ACOMP] & aMask) | (dst[i][ACOMP] & ~aMask);
+ }
}
-
- for (i = 0; i < n; i++) {
- if (!rMask) rgba[i][RCOMP] = dest[i][RCOMP];
- if (!gMask) rgba[i][GCOMP] = dest[i][GCOMP];
- if (!bMask) rgba[i][BCOMP] = dest[i][BCOMP];
- if (!aMask) rgba[i][ACOMP] = dest[i][ACOMP];
+ else {
+ /* 4-byte components */
+ const GLuint rMask = ctx->Color.ColorMask[RCOMP] ? ~0x0 : 0x0;
+ const GLuint gMask = ctx->Color.ColorMask[GCOMP] ? ~0x0 : 0x0;
+ const GLuint bMask = ctx->Color.ColorMask[BCOMP] ? ~0x0 : 0x0;
+ const GLuint aMask = ctx->Color.ColorMask[ACOMP] ? ~0x0 : 0x0;
+ const GLuint (*dst)[4] = (const GLuint (*)[4]) rbPixels;
+ GLuint (*src)[4] = (GLuint (*)[4]) span->array->attribs[FRAG_ATTRIB_COL0];
+ GLuint i;
+ for (i = 0; i < n; i++) {
+ src[i][RCOMP] = (src[i][RCOMP] & rMask) | (dst[i][RCOMP] & ~rMask);
+ src[i][GCOMP] = (src[i][GCOMP] & gMask) | (dst[i][GCOMP] & ~gMask);
+ src[i][BCOMP] = (src[i][BCOMP] & bMask) | (dst[i][BCOMP] & ~bMask);
+ src[i][ACOMP] = (src[i][ACOMP] & aMask) | (dst[i][ACOMP] & ~aMask);
+ }
}
-
-#endif
}
-
-/*
- * Apply glIndexMask to a span of CI pixels.
+/**
+ * Apply the index mask to a span of color index values.
*/
void
-_mesa_mask_index_span( GLcontext *ctx,
- GLuint n, GLint x, GLint y, GLuint index[] )
+_swrast_mask_ci_span(GLcontext *ctx, struct gl_renderbuffer *rb,
+ SWspan *span)
{
+ const GLuint srcMask = ctx->Color.IndexMask;
+ const GLuint dstMask = ~srcMask;
+ GLuint *index = span->array->index;
+ GLuint dest[MAX_WIDTH];
GLuint i;
- GLuint fbindexes[MAX_WIDTH];
- GLuint msrc, mdest;
-
- _mesa_read_index_span( ctx, ctx->DrawBuffer, n, x, y, fbindexes );
- msrc = ctx->Color.IndexMask;
- mdest = ~msrc;
+ ASSERT(span->arrayMask & SPAN_INDEX);
+ ASSERT(span->end <= MAX_WIDTH);
+ ASSERT(rb->DataType == GL_UNSIGNED_INT);
- for (i=0;i<n;i++) {
- index[i] = (index[i] & msrc) | (fbindexes[i] & mdest);
+ if (span->arrayMask & SPAN_XY) {
+ _swrast_get_values(ctx, rb, span->end, span->array->x, span->array->y,
+ dest, sizeof(GLuint));
+ }
+ else {
+ _swrast_read_index_span(ctx, rb, span->end, span->x, span->y, dest);
}
-}
-
-
-
-/*
- * Apply glIndexMask to an array of CI pixels.
- */
-void
-_mesa_mask_index_pixels( GLcontext *ctx,
- GLuint n, const GLint x[], const GLint y[],
- GLuint index[], const GLubyte mask[] )
-{
- SWcontext *swrast = SWRAST_CONTEXT(ctx);
- GLuint i;
- GLuint fbindexes[PB_SIZE];
- GLuint msrc, mdest;
-
- (*swrast->Driver.ReadCI32Pixels)( ctx, n, x, y, fbindexes, mask );
-
- msrc = ctx->Color.IndexMask;
- mdest = ~msrc;
- for (i=0;i<n;i++) {
- index[i] = (index[i] & msrc) | (fbindexes[i] & mdest);
+ for (i = 0; i < span->end; i++) {
+ index[i] = (index[i] & srcMask) | (dest[i] & dstMask);
}
}
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