On Tue, 10 Jul 2007 00:54:04 -0300 "Gustavo Sverzut Barbieri" <[EMAIL PROTECTED]> babbled:
> On 7/9/07, Enlightenment CVS <[EMAIL PROTECTED]> wrote: > > + * EVAS_COLORSPACE_RGB565_A5P: > > + * > > + * In the process of being implemented in 1 engine only. This may change. > > + * > > + * This is a pointer to image data for 16-bit half-word pixel data in 16bpp > > + * RGB 565 format (5 bits red, 6 bits green, 5 bits blue), with the > > high-byte > > + * containing red and the low byte containing blue, per pixel. This data is > > + * packed row by row from the top-left to the bottom right. > > + * > > + * If the image has an alpha channel enabled there will be an extra alpha > > plane > > + * after the color pixel plane. If not, then this data will not exist and > > + * should not be accessed in any way. This plane is a set of pixels with 1 > > + * byte per pixel defining the alpha values of all pixels in the image from > > + * the top-left to the bottom right of the image, row by row. Even though > > + * the values of the alpha pixels can be 0 to 255, only values 0 through > > to 32 > > + * are used, 32 being solid and 0 being transparent. > > current implementation is solid is 31 (5 bits, all 1). really? hmm - so you didn't use the code i originally had for this that was 0-32 to avoid an extra add in the blend routine. > > > + * RGB values can be 0 to 31 for red and blue and 0 to 63 for green, with 0 > > + * being black and 31 or 63 being full red, green or blue respectively. > > This > > + * colorspace is also pre-multiplied like EVAS_COLORSPACE_ARGB8888 so: > > + * > > + * R = (r * a) / 32; G = (g * a) / 32; B = (b * a) / 32; > > No, this is not pre-multiplied, I just convert RGB 888 to 565: > > *da = A_VAL(sp) >> 3; > *dp = RGB_565_FROM_COMPONENTS(R_VAL(sp), G_VAL(sp), B_VAL > (sp)); > > RGB_565_FROM_COMPONENTS() just discard less significant bits and then > bitwise-OR to pack them in the correct format. or do you mean "sp" is > already pre-multiplied? I never considered this and results looks ok. sp is already pre-multiplied - thus the rgb565 will be too :) > > /** > > @@ -583,7 +654,7 @@ > > * Sets the raw image data. > > * load for the given image object. > > * @param obj The given image object. > > - * @param data The given data as 32 bit unsigned integer in format ARGB. > > is this in ARGB 888 pre-multiplied? > > -- > Gustavo Sverzut Barbieri > -------------------------------------- > Jabber: [EMAIL PROTECTED] > MSN: [EMAIL PROTECTED] > ICQ#: 17249123 > Skype: gsbarbieri > Mobile: +55 (81) 9927 0010 > > ------------------------------------------------------------------------- > This SF.net email is sponsored by DB2 Express > Download DB2 Express C - the FREE version of DB2 express and take > control of your XML. No limits. Just data. Click to get it now. > http://sourceforge.net/powerbar/db2/ > _______________________________________________ > enlightenment-devel mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/enlightenment-devel > -- ------------- Codito, ergo sum - "I code, therefore I am" -------------- The Rasterman (Carsten Haitzler) [EMAIL PROTECTED] 裸好多 Tokyo, Japan (東京 日本) ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ enlightenment-cvs mailing list enlightenment-cvs@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/enlightenment-cvs
