Alexei Podtelezhnikov pushed to branch master at FreeType / FreeType Demo Programs
Commits:
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ff5435e4
by Alexei Podtelezhnikov at 2021-02-28T08:41:38-05:00
2 changed files:
Changes:
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+2021-02-28 Alexei Podtelezhnikov <apodtele@gmail.com>
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+ [graph/x11] Gray multiplication tricks.
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+ |
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+ * graph/x11/grx11.c (gr_x11_convert_gray_to_rgb{555,565,0888,8880}):
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+ Combine multiple shifts into multiplication.
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+ |
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| 1 | 8 |
2021-02-26 Alexei Podtelezhnikov <apodtele@gmail.com>
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| 2 | 9 |
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| 3 | 10 |
[ftdiff] Make it agnostic to display mode.
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| ... | ... | @@ -257,9 +257,8 @@ |
| 257 | 257 |
unsigned int p = lread[0];
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| 258 | 258 |
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| 259 | 259 |
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- lwrite[0] = (unsigned short)( ( ( p << 8 ) & 0xF800U ) |
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- ( ( p << 3 ) & 0x07E0 ) |
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- ( ( p >> 3 ) & 0x001F ) );
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+ lwrite[0] = (unsigned short)( ( ( p >> 3 ) * 0x0801U ) |
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+ ( ( p >> 2 ) * 0x0020U ) );
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| 263 | 262 |
}
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| 264 | 263 |
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| 265 | 264 |
line_read += blit->src_pitch;
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| ... | ... | @@ -382,14 +381,7 @@ |
| 382 | 381 |
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| 383 | 382 |
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| 384 | 383 |
for ( ; x > 0; x--, lread++, lwrite++ )
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- {
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- unsigned int p = lread[0];
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- |
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- |
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- lwrite[0] = (unsigned short)( ( ( p << 7 ) & 0x7C00 ) |
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- ( ( p << 2 ) & 0x03E0 ) |
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- ( ( p >> 3 ) & 0x001F ) );
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- }
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+ *lwrite = (unsigned short)( ( *lread >> 3 ) * 0x0421U );
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| 393 | 385 |
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| 394 | 386 |
line_read += blit->src_pitch;
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| 395 | 387 |
line_write += blit->dst_pitch;
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| ... | ... | @@ -619,14 +611,7 @@ |
| 619 | 611 |
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| 620 | 612 |
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| 621 | 613 |
for ( ; x > 0; x--, lread++, lwrite++ )
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- {
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- uint32_t p = lread[0];
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- |
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- |
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- *lwrite = ( p << 24 ) |
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- ( p << 16 ) |
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- ( p << 8 );
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- }
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+ *lwrite = *lread * 0x01010100U;
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| 630 | 615 |
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| 631 | 616 |
line_read += blit->src_pitch;
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| 632 | 617 |
line_write += blit->dst_pitch;
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| ... | ... | @@ -699,14 +684,7 @@ |
| 699 | 684 |
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| 700 | 685 |
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| 701 | 686 |
for ( ; x > 0; x--, lread++, lwrite++ )
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- {
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- uint32_t p = lread[0];
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- |
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- |
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- *lwrite = ( p << 16 ) |
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- ( p << 8 ) |
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- ( p << 0 );
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- }
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+ *lwrite = *lread * 0x010101U;
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| 710 | 688 |
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| 711 | 689 |
line_read += blit->src_pitch;
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| 712 | 690 |
line_write += blit->dst_pitch;
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