diff options
Diffstat (limited to 'distrib/jpeg-6b/jccolor.c')
| -rw-r--r-- | distrib/jpeg-6b/jccolor.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/distrib/jpeg-6b/jccolor.c b/distrib/jpeg-6b/jccolor.c index 67078ab..61e262d 100644 --- a/distrib/jpeg-6b/jccolor.c +++ b/distrib/jpeg-6b/jccolor.c @@ -219,6 +219,52 @@ rgb565_ycc_convert (j_compress_ptr cinfo, } } } + +/* Converts RGBA8888 row into YCbCr */ +METHODDEF(void) +rgba8888_ycc_convert (j_compress_ptr cinfo, + JSAMPARRAY input_buf, JSAMPIMAGE output_buf, + JDIMENSION output_row, int num_rows) +{ + my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert; + register int r, g, b; + register INT32 * ctab = cconvert->rgb_ycc_tab; + register INT32* inptr; + register JSAMPROW outptr0, outptr1, outptr2; + register JDIMENSION col; + JDIMENSION num_cols = cinfo->image_width; + + while (--num_rows >= 0) { + inptr = (INT32*)(*input_buf++); + outptr0 = output_buf[0][output_row]; + outptr1 = output_buf[1][output_row]; + outptr2 = output_buf[2][output_row]; + output_row++; + for (col = 0; col < num_cols; col++) { + register const unsigned char* color = (unsigned char*)(inptr + col); + r = (*color) & 0xff; color++; + g = (*color) & 0xff; color++; + b = (*color) & 0xff; color++; + /* If the inputs are 0..MAXJSAMPLE, the outputs of these equations + * must be too; we do not need an explicit range-limiting operation. + * Hence the value being shifted is never negative, and we don't + * need the general RIGHT_SHIFT macro. + */ + /* Y */ + outptr0[col] = (JSAMPLE) + ((ctab[r+R_Y_OFF] + ctab[g+G_Y_OFF] + ctab[b+B_Y_OFF]) + >> SCALEBITS); + /* Cb */ + outptr1[col] = (JSAMPLE) + ((ctab[r+R_CB_OFF] + ctab[g+G_CB_OFF] + ctab[b+B_CB_OFF]) + >> SCALEBITS); + /* Cr */ + outptr2[col] = (JSAMPLE) + ((ctab[r+R_CR_OFF] + ctab[g+G_CR_OFF] + ctab[b+B_CR_OFF]) + >> SCALEBITS); + } + } +} #endif /* ANDROID_RGB */ /**************** Cases other than RGB -> YCbCr **************/ @@ -505,6 +551,10 @@ jinit_color_converter (j_compress_ptr cinfo) if (cinfo->input_components != 2) ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); break; + case JCS_RGBA_8888: + if (cinfo->input_components != 4) + ERREXIT(cinfo, JERR_BAD_IN_COLORSPACE); + break; #endif /* ANDROID_RGB */ default: /* JCS_UNKNOWN can be anything */ @@ -551,6 +601,9 @@ jinit_color_converter (j_compress_ptr cinfo) else if (cinfo->in_color_space == JCS_RGB_565) { cconvert->pub.start_pass = rgb_ycc_start; cconvert->pub.color_convert = rgb565_ycc_convert; + } else if (cinfo->in_color_space == JCS_RGBA_8888) { + cconvert->pub.start_pass = rgb_ycc_start; + cconvert->pub.color_convert = rgba8888_ycc_convert; } #endif /* ANDROID_RGB */ else |