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Add one more optimization for an often used case of bitmap rendering.

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B_RGBA32 and B_RGB32 in B_OP_OVER no longer go through the generic AGG code
path, but have an optimized version now, as long as the bitmap is not scaled.
B_RGB32 needs to handle B_TRANSPARENT_MAGIC_RGBA32, while B_RGBA32 works just
like regular alpha blending.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26427 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus
2008-07-15 15:41:03 +00:00
parent b0387fe2bb
commit fe71730a9c
1 changed files with 40 additions and 19 deletions
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src/servers/app/drawing/Painter/Painter.cpp
+26 -5
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@@ -1273,6 +1273,21 @@ copy_bitmap_row_bgr32_copy(uint8* dst, const uint8* src, int32 numPixels,
memcpy(dst, src, numPixels * 4);
}
// copy_bitmap_row_bgr32_over
static inline void
copy_bitmap_row_bgr32_over(uint8* dst, const uint8* src, int32 numPixels,
const rgb_color* colorMap)
{
uint32* d = (uint32*)dst;
uint32* s = (uint32*)src;
while (numPixels--) {
if (*s != B_TRANSPARENT_MAGIC_RGBA32)
*(uint32*)d = *(uint32*)s;
d++;
s++;
}
}
// copy_bitmap_row_bgr32_alpha
static inline void
copy_bitmap_row_bgr32_alpha(uint8* dst, const uint8* src, int32 numPixels,
@@ -1326,8 +1341,7 @@ Painter::_TransparentMagicToAlpha(sourcePixel* buffer, uint32 width,
// _DrawBitmap
void
Painter::_DrawBitmap(agg::rendering_buffer& srcBuffer, color_space format,
BRect actualBitmapRect, BRect bitmapRect,
BRect viewRect) const
BRect actualBitmapRect, BRect bitmapRect, BRect viewRect) const
{
if (!fValidClipping
|| !bitmapRect.IsValid() || !bitmapRect.Intersects(actualBitmapRect)
@@ -1392,6 +1406,14 @@ Painter::_DrawBitmap(agg::rendering_buffer& srcBuffer, color_space format,
_DrawBitmapNoScale32(copy_bitmap_row_bgr32_copy, 4,
srcBuffer, xOffset, yOffset, viewRect);
return;
} else if (fDrawingMode == B_OP_OVER) {
if (format == B_RGB32)
_DrawBitmapNoScale32(copy_bitmap_row_bgr32_over, 4,
srcBuffer, xOffset, yOffset, viewRect);
else
_DrawBitmapNoScale32(copy_bitmap_row_bgr32_alpha, 4,
srcBuffer, xOffset, yOffset, viewRect);
return;
} else if (fDrawingMode == B_OP_ALPHA
&& fAlphaSrcMode == B_PIXEL_ALPHA
&& fAlphaFncMode == B_ALPHA_OVERLAY) {
@@ -1404,7 +1426,7 @@ Painter::_DrawBitmap(agg::rendering_buffer& srcBuffer, color_space format,
if (format == B_RGBA32 || fDrawingMode == B_OP_COPY) {
_DrawBitmapGeneric32(srcBuffer, xOffset, yOffset,
xScale, yScale, viewRect);
break;
return;
}
// otherwise fall through to get proper transparency handling for
// B_RGB32 where a B_TRANSPARENT_MAGIC might be set on pixels
@@ -1431,8 +1453,7 @@ Painter::_DrawBitmap(agg::rendering_buffer& srcBuffer, color_space format,
BBitmap temp(actualBitmapRect, B_BITMAP_NO_SERVER_LINK, B_RGBA32);
status_t err = temp.ImportBits(srcBuffer.buf(),
srcBuffer.height() * srcBuffer.stride(),
srcBuffer.stride(),
0, format);
srcBuffer.stride(), 0, format);
if (err >= B_OK) {
// the original bitmap might have had some of the