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-rw-r--r--src/mesa/drivers/windows/gdi/wmesa.c95
1 files changed, 78 insertions, 17 deletions
diff --git a/src/mesa/drivers/windows/gdi/wmesa.c b/src/mesa/drivers/windows/gdi/wmesa.c
index ea3f1780d3..7e8a87921b 100644
--- a/src/mesa/drivers/windows/gdi/wmesa.c
+++ b/src/mesa/drivers/windows/gdi/wmesa.c
@@ -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. */