/**
* Apply the current logic operator to a span of RGBA pixels.
* We can handle horizontal runs of pixels (spans) or arrays of x/y
* pixel coordinates.
*/
void
_swrast_logicop_rgba_span(struct gl_context *ctx, struct gl_renderbuffer *rb,
SWspan *span)
{
void *rbPixels;
ASSERT(span->end < SWRAST_MAX_WIDTH);
ASSERT(span->arrayMask & SPAN_RGBA);
rbPixels = _swrast_get_dest_rgba(ctx, rb, span);
if (span->array->ChanType == GL_UNSIGNED_BYTE) {
/* treat 4*GLubyte as GLuint */
logicop_uint1(ctx, span->end,
(GLuint *) span->array->rgba8,
(const GLuint *) rbPixels, span->array->mask);
}
else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
/* treat 2*GLushort as GLuint */
logicop_uint2(ctx, 2 * span->end,
(GLuint *) span->array->rgba16,
(const GLuint *) rbPixels, span->array->mask);
}
else {
logicop_uint4(ctx, 4 * span->end,
(GLuint *) span->array->attribs[VARYING_SLOT_COL0],
(const GLuint *) rbPixels, span->array->mask);
}
}
/**
* Apply the current logic operator to a span of RGBA pixels.
* We can handle horizontal runs of pixels (spans) or arrays of x/y
* pixel coordinates.
*/
void
_swrast_logicop_rgba_span(GLcontext *ctx, struct gl_renderbuffer *rb,
SWspan *span)
{
void *rbPixels;
ASSERT(span->end < MAX_WIDTH);
ASSERT(span->arrayMask & SPAN_RGBA);
ASSERT(rb->DataType == span->array->ChanType);
rbPixels = _swrast_get_dest_rgba(ctx, rb, span);
if (span->array->ChanType == GL_UNSIGNED_BYTE) {
/* treat 4*GLubyte as GLuint */
logicop_uint1(ctx, span->end,
(GLuint *) span->array->color.sz1.rgba,
(const GLuint *) rbPixels, span->array->mask);
}
else if (span->array->ChanType == GL_UNSIGNED_SHORT) {
/* treat 2*GLushort as GLuint */
logicop_uint2(ctx, 2 * span->end,
(GLuint *) span->array->color.sz2.rgba,
(const GLuint *) rbPixels, span->array->mask);
}
else {
logicop_uint4(ctx, 4 * span->end,
(GLuint *) span->array->attribs[FRAG_ATTRIB_COL0],
(const GLuint *) rbPixels, span->array->mask);
}
}
/**
* 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);
}
}
}