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finished my drawBitmap optimisations

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svn-id: r8305
This commit is contained in:
Max Horn 2003-06-05 00:12:23 +00:00
parent b4da713bfd
commit c898d6117e
1 changed files with 11 additions and 9 deletions
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20
scumm/gfx.cpp
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@ -995,20 +995,22 @@ void Gdi::drawBitmap(const byte *ptr, VirtScreen *vs, int x, int y, const int wi
byte dither_table[128];
byte *ptr_dither_table;
memset(dither_table, 0, sizeof(dither_table));
int theX, theY;
int theX, theY, maxX;
if (table) {
src = smap_ptr + table->offsets[stripnr];
theX = left;
maxX = right;
} else {
src = smap_ptr;
theX = 0;
maxX = width;
}
// Draw image data. To do this, we decode the full RLE graphics data,
// but only draw those parts we actually want to display.
assert(height <= 128);
for (; theX < width; theX++) {
for (; theX < maxX; theX++) {
ptr_dither_table = dither_table;
for (theY = 0; theY < height; theY++) {
if (--run == 0) {
@ -1050,23 +1052,23 @@ void Gdi::drawBitmap(const byte *ptr, VirtScreen *vs, int x, int y, const int wi
run = *src++;
theX = 0;
}
while (theX < width) {
while (theX < right) {
if (run & 0x80) {
run &= 0x7f;
data = *src++;
do {
if (left <= theX && theX < right) {
if (left <= theX) {
*mask_ptr = data;
mask_ptr += _numStrips;
}
theY++;
if (theY >= height) {
if (left <= theX && theX < right) {
if (left <= theX) {
mask_ptr -= height * _numStrips - 1;
}
theY = 0;
theX += 8;
if (theX >= width)
if (theX >= right)
break;
}
} while (--run);
@ -1074,18 +1076,18 @@ void Gdi::drawBitmap(const byte *ptr, VirtScreen *vs, int x, int y, const int wi
do {
data = *src++;
if (left <= theX && theX < right) {
if (left <= theX) {
*mask_ptr = data;
mask_ptr += _numStrips;
}
theY++;
if (theY >= height) {
if (left <= theX && theX < right) {
if (left <= theX) {
mask_ptr -= _numStrips * height - 1;
}
theY = 0;
theX += 8;
if (theX >= width)
if (theX >= right)
break;
}
} while (--run);