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Avoid branching in the inner loop of AGOS drawVertImageCompressed

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svn-id: r33167
This commit is contained in:
Bertrand Augereau 2008-07-21 10:13:44 +00:00
parent 5a71d764e7
commit ecd44b8f90
1 changed files with 26 additions and 13 deletions
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39
engines/agos/gfx.cpp
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@ -8,7 +8,7 @@
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
d
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
@ -806,7 +806,6 @@ void AGOSEngine::drawVertImageUncompressed(VC10_state *state) {
void AGOSEngine::drawVertImageCompressed(VC10_state *state) {
assert (state->flags & kDFCompressed) ;
uint w, h;
byte *src, *dst, *dstPtr;
state->x_skip *= 4; /* reached */
@ -815,7 +814,7 @@ void AGOSEngine::drawVertImageCompressed(VC10_state *state) {
vc10_skip_cols(state);
dstPtr = state->surf_addr;
byte *dstPtr = state->surf_addr;
if (!(state->flags & kDFNonTrans) && (state->flags & 0x40)) { /* reached */
dstPtr += vcReadVar(252);
}
@ -823,20 +822,34 @@ void AGOSEngine::drawVertImageCompressed(VC10_state *state) {
do {
byte color;
src = vc10_depackColumn(state);
dst = dstPtr;
const byte *src = vc10_depackColumn(state);
byte *dst = dstPtr;
h = 0;
do {
color = (*src / 16);
if ((state->flags & kDFNonTrans) || color != 0)
if (state->flags & kDFNonTrans) {
do {
byte colors = *src;
color = (colors / 16);
dst[0] = color | state->palette;
color = (*src & 15);
if ((state->flags & kDFNonTrans) || color != 0)
color = (colors & 15);
dst[1] = color | state->palette;
dst += state->surf_pitch;
src++;
} while (++h != state->draw_height);
dst += state->surf_pitch;
src++;
} while (++h != state->draw_height);
}
else {
do {
byte colors = *src;
color = (colors / 16);
if (color != 0)
dst[0] = color | state->palette;
color = (colors & 15);
if (color != 0)
dst[1] = color | state->palette;
dst += state->surf_pitch;
src++;
} while (++h != state->draw_height);
}
dstPtr += 2;
} while (++w != state->draw_width);
}