mirror of
https://github.com/reactos/reactos.git
synced 2024-11-18 21:13:52 +00:00
94 lines
3.8 KiB
C
94 lines
3.8 KiB
C
/*
|
|
* Mesa 3-D graphics library
|
|
* Version: 6.5.2
|
|
*
|
|
* 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"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* Implement the effect of glColorMask and glIndexMask in software.
|
|
*/
|
|
|
|
#include <precomp.h>
|
|
|
|
/**
|
|
* Apply the color mask to a span of rgba values.
|
|
*/
|
|
void
|
|
_swrast_mask_rgba_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
|
|
SWspan *span)
|
|
{
|
|
const GLuint n = span->end;
|
|
void *rbPixels;
|
|
|
|
ASSERT(n < MAX_WIDTH);
|
|
ASSERT(span->arrayMask & SPAN_RGBA);
|
|
|
|
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 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);
|
|
}
|
|
}
|
|
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_COL];
|
|
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);
|
|
}
|
|
}
|
|
}
|