2D
S3C2416X
RISC MICROPROCESSOR
18-6
4.1.6 Transparent
Mode
2D can render image in Transparent Mode. In this mode, the pixels having the same color with background color
(BG_COLOR) are discarded, resulting in a transparent effect. The function of Transparent Mode is illustrated in
the images below, in which the BG_COLOR is set to white.
Figure 18-5. Transparent Mode
2D supports both host-to-screen mode and memory-to-screen mode of BLT.
4.1.7 Known
Issue
In the stretch mode (when source image is scaled), the source coordinates are always rounded to the nearest.
This rounding may cause some problem in the boundary when users try to scale the image by integer times. For
example, if user wants to scale the image by four times, and set the X_INCR as 0.25, the source coordinates in
sequence are 0, 0.25, 0.50, 0.75, 1.0 and so on. However, when the current source coordinate is 0.75, it is
rounded to the nearest integer, which is 1, so the first pixel only repeats three times instead of four times. Such
problem may not be an issue when both the source and destination are big pictures or when the scale is not an
integer, but when it comes to small icons or when user wants every pixel to repeat exactly integer times, an
obvious error will occur.
Summary of Contents for S3C2416
Page 122: ...BUS MATRIX EBI S3C2416X RISC MICROPROCESSOR 3 4 NOTES ...
Page 204: ...DMA CONTROLLER S3C2416X RISC MICROPROCESSOR 8 18 NOTES ...
Page 284: ...WATCHDOG TIMER S3C2416X RISC MICROPROCESSOR 11 6 NOTES ...
Page 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
Page 344: ...UART S3C2416X RISC MICROPROCESSOR 14 24 NOTES ...
Page 380: ...USB2 0 DEVICE S3C2416X RISC MICROPROCESSOR 16 34 NOTES ...
Page 432: ...2D S3C2416X RISC MICROPROCESSOR 18 38 NOTES ...
Page 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Page 604: ...S3C2416X RISC MICROPROCESSOR S3C2416X RISC MICROPROCESSOR 23 22 NOTES ...
Page 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Page 670: ...ELECTRICAL DATA S3C2416X RISC MICROPROCESSOR 26 32 NOTES ...