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faster write_rgba_span_front()

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This commit is contained in:
Andreas Micheler 2007-10-15 08:26:03 -06:00 • committed by Brian
parent f33e1a4403
commit 157eeb5c3b
1 changed files with 78 additions and 17 deletions
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95
src/mesa/drivers/windows/gdi/wmesa.c
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@ -458,23 +458,84 @@ static void write_rgba_span_front(const GLcontext *ctx,
const GLubyte rgba[][4],
const GLubyte mask[] )
{
WMesaContext pwc = wmesa_context(ctx);
GLuint i;
(void) ctx;
y=FLIP(y);
if (mask) {
for (i=0; i<n; i++)
if (mask[i])
SetPixel(pwc->hDC, x+i, y, RGB(rgba[i][RCOMP], rgba[i][GCOMP],
rgba[i][BCOMP]));
}
else {
for (i=0; i<n; i++)
SetPixel(pwc->hDC, x+i, y, RGB(rgba[i][RCOMP], rgba[i][GCOMP],
rgba[i][BCOMP]));
}
WMesaContext pwc = wmesa_context(ctx);
WMesaFramebuffer pwfb = wmesa_lookup_framebuffer(pwc->hDC);
CONST BITMAPINFO bmi=
{
{
sizeof(BITMAPINFOHEADER),
n, 1, 1, 32, BI_RGB, 0, 1, 1, 0, 0
}
};
HBITMAP bmp=0;
HDC mdc=0;
typedef union
{
unsigned i;
struct {
unsigned b:8, g:8, r:8, a:8;
};
} BGRA;
BGRA *bgra, c;
int i;
if (n < 16) { // the value 16 is just guessed
y=FLIP(y);
if (mask) {
for (i=0; i<n; i++)
if (mask[i])
SetPixel(pwc->hDC, x+i, y,
RGB(rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]));
}
else {
for (i=0; i<n; i++)
SetPixel(pwc->hDC, x+i, y,
RGB(rgba[i][RCOMP], rgba[i][GCOMP], rgba[i][BCOMP]));
}
}
else {
if (!pwfb) {
_mesa_problem(NULL, "wmesa: write_rgba_span_front on unknown hdc");
return;
}
bgra=malloc(n*sizeof(BGRA));
if (!bgra) {
_mesa_problem(NULL, "wmesa: write_rgba_span_front: out of memory");
return;
}
c.a=0;
if (mask) {
for (i=0; i<n; i++) {
if (mask[i]) {
c.r=rgba[i][RCOMP];
c.g=rgba[i][GCOMP];
c.b=rgba[i][BCOMP];
c.a=rgba[i][ACOMP];
bgra[i]=c;
}
else
bgra[i].i=0;
}
}
else {
for (i=0; i<n; i++) {
c.r=rgba[i][RCOMP];
c.g=rgba[i][GCOMP];
c.b=rgba[i][BCOMP];
c.a=rgba[i][ACOMP];
bgra[i]=c;
}
}
bmp=CreateBitmap(n, 1, 1, 32, bgra);
mdc=CreateCompatibleDC(pwfb->hDC);
SelectObject(mdc, bmp);
y=FLIP(y);
BitBlt(pwfb->hDC, x, y, n, 1, mdc, 0, 0, SRCCOPY);
SelectObject(mdc, 0);
DeleteObject(bmp);
DeleteDC(mdc);
free(bgra);
}
}
/* Write a horizontal span of RGB color pixels with a boolean mask. */