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* fixed wrong byte order in DrawingModeAlphaCC 

* added another optimized bitmap drawing routine
  for B_OP_ALPHA and BGR[A]32 bitmaps. When actual
  blending takes place, it is more than 1.7 times
  faster than R5, and about the same speed when
  the bitmap is fully opaque.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@15761 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stephan Aßmus 2005-12-31 01:03:26 +00:00
parent 1fce337f89
commit ec42af75e8
2 changed files with 42 additions and 6 deletions
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44
src/servers/app/drawing/Painter/Painter.cpp
View File

@ -1334,6 +1334,31 @@ copy_bitmap_row_bgr32_copy(uint8* dst, const uint8* src, int32 numPixels,
memcpy(dst, src, numPixels * 4);
}
// copy_bitmap_row_bgr32_alpha
static inline void
copy_bitmap_row_bgr32_alpha(uint8* dst, const uint8* src, int32 numPixels,
const rgb_color* colorMap)
{
uint32* d = (uint32*)dst;
int32 bytes = numPixels * 4;
uint8 buffer[bytes];
uint8* b = buffer;
while (numPixels--) {
if (src[3] == 255) {
*(uint32*)b = *(uint32*)src;
} else {
*(uint32*)b = *d;
b[0] = ((src[0] - b[0]) * src[3] + (b[0] << 8)) >> 8;
b[1] = ((src[1] - b[1]) * src[3] + (b[1] << 8)) >> 8;
b[2] = ((src[2] - b[2]) * src[3] + (b[2] << 8)) >> 8;
}
d ++;
b += 4;
src += 4;
}
memcpy(dst, buffer, bytes);
}
// _DrawBitmap
void
Painter::_DrawBitmap(const agg::rendering_buffer& srcBuffer, color_space format,
@ -1395,14 +1420,25 @@ Painter::_DrawBitmap(const agg::rendering_buffer& srcBuffer, color_space format,
switch (format) {
case B_RGB32:
case B_RGBA32:
case B_RGBA32: {
bool generic = true;
// maybe we can use an optimized version
if (fDrawingMode == B_OP_COPY && xScale == 1.0 && yScale == 1.0) {
_DrawBitmapNoScale32(copy_bitmap_row_bgr32_copy, 4, srcBuffer, xOffset, yOffset, viewRect);
} else {
if (xScale == 1.0 && yScale == 1.0) {
if (fDrawingMode == B_OP_COPY) {
_DrawBitmapNoScale32(copy_bitmap_row_bgr32_copy, 4, srcBuffer, xOffset, yOffset, viewRect);
generic = false;
} else if (fDrawingMode == B_OP_ALPHA
&& fAlphaSrcMode == B_PIXEL_ALPHA && fAlphaFncMode == B_ALPHA_OVERLAY) {
_DrawBitmapNoScale32(copy_bitmap_row_bgr32_alpha, 4, srcBuffer, xOffset, yOffset, viewRect);
generic = false;
}
}
if (generic) {
_DrawBitmapGeneric32(srcBuffer, xOffset, yOffset, xScale, yScale, viewRect);
}
break;
}
default: {
bool generic = true;
if (format == B_CMAP8 && xScale == 1.0 && yScale == 1.0) {

4
src/servers/app/drawing/Painter/drawing_modes/DrawingModeAlphaCC.h
View File

@ -20,9 +20,9 @@
// ASSIGN_ALPHA_CC
#define ASSIGN_ALPHA_CC(d, r, g, b) \
{ \
d[0] = (r); \
d[0] = (b); \
d[1] = (g); \
d[2] = (b); \
d[2] = (r); \
d[3] = 255; \
}