forked from minhngoc25a/freetype2
1269 lines
32 KiB
C
1269 lines
32 KiB
C
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/****************************************************************************/
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/* */
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/* The FreeType project -- a free and portable quality TrueType renderer. */
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/* */
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/* Copyright 1996-1999 by */
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/* D. Turner, R.Wilhelm, and W. Lemberg */
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/* */
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/* blitter.c: Support for blitting of bitmaps with various depth. */
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/* */
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/****************************************************************************/
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#include "grblit.h"
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#include "grobjs.h"
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static
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int compute_clips( grBlitter* blit,
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int x_offset,
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int y_offset )
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{
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int xmin, ymin, xmax, ymax, width, height, target_width;
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/* perform clipping and setup variables */
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width = blit->source.width;
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height = blit->source.rows;
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switch ( blit->source.mode )
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{
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case gr_pixel_mode_mono:
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width = (width + 7) & -8;
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break;
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case gr_pixel_mode_pal4:
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width = (width + 1) & -2;
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break;
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default:
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;
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}
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xmin = x_offset;
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ymin = y_offset;
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xmax = xmin + width-1;
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ymax = ymin + height-1;
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/* clip if necessary */
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if ( width == 0 || height == 0 ||
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xmax < 0 || xmin >= blit->target.width ||
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ymax < 0 || ymin >= blit->target.rows )
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return 1;
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/* set up clipping and cursors */
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blit->yread = 0;
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if ( ymin < 0 )
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{
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blit->yread -= ymin;
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height += ymin;
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blit->ywrite = 0;
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}
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else
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blit->ywrite = ymin;
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if ( ymax >= blit->target.rows )
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height -= ymax - blit->target.rows + 1;
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blit->xread = 0;
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if ( xmin < 0 )
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{
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blit->xread -= xmin;
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width += xmin;
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blit->xwrite = 0;
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}
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else
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blit->xwrite = xmin;
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target_width = blit->target.width;
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switch ( blit->target.mode )
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{
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case gr_pixel_mode_mono:
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target_width = (target_width + 7) & -8;
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break;
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case gr_pixel_mode_pal4:
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target_width = (target_width + 1) & -2;
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break;
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default:
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;
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}
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blit->right_clip = xmax - target_width + 1;
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if ( blit->right_clip > 0 )
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width -= blit->right_clip;
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else
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blit->right_clip = 0;
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blit->width = width;
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blit->height = height;
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/* set read and write to the top-left corner of the read */
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/* and write areas before clipping. */
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blit->read = (unsigned char*)blit->source.buffer;
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blit->write = (unsigned char*)blit->target.buffer;
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blit->read_line = blit->source.pitch;
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blit->write_line = blit->target.pitch;
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if ( blit->read_line < 0 )
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blit->read -= (blit->source.rows-1) * blit->read_line;
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if ( blit->write_line < 0 )
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blit->write -= (blit->target.rows-1) * blit->write_line;
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/* now go to the start line. Note that we do not move the */
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/* x position yet, as this is dependent on the pixel format */
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blit->read += blit->yread * blit->read_line;
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blit->write += blit->ywrite * blit->write_line;
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return 0;
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}
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/**************************************************************************/
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/* */
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/* <Function> blit_mono_to_mono */
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/* */
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/**************************************************************************/
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static
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void blit_mono_to_mono( grBlitter* blit,
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grColor color )
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{
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int shift, left_clip, x, y;
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byte* read;
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byte* write;
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(void)color; /* unused argument */
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left_clip = ( blit->xread > 0 );
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shift = ( blit->xwrite - blit->xread ) & 7;
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read = blit->read + (blit->xread >> 3);
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write = blit->write + (blit->xwrite >> 3);
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if ( shift == 0 )
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{
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y = blit->height;
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do
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{
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byte* _read = read;
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byte* _write = write;
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x = blit->width;
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do
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{
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*_write++ |= *_read++;
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x -= 8;
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} while ( x > 0 );
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read += blit->read_line;
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write += blit->write_line;
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y--;
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} while ( y > 0 );
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}
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else
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{
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int first, last, count;
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first = blit->xwrite >> 3;
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last = (blit->xwrite + blit->width-1) >> 3;
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count = last - first;
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if ( blit->right_clip )
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count++;
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y = blit->height;
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do
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{
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unsigned char* _read = read;
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unsigned char* _write = write;
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unsigned char old;
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int shift2 = (8-shift);
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if ( left_clip )
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old = (*_read++) << shift2;
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else
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old = 0;
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x = count;
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while ( x > 0 )
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{
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unsigned char val;
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val = *_read++;
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*_write++ |= ( (val >> shift) | old );
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old = val << shift2;
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x--;
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}
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if ( !blit->right_clip )
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*_write |= old;
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read += blit->read_line;
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write += blit->write_line;
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y--;
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} while ( y > 0 );
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}
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}
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/**************************************************************************/
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/* */
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/* <Function> blit_mono_to_pal8 */
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/* */
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/**************************************************************************/
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static
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void blit_mono_to_pal8( grBlitter* blit,
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grColor color )
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{
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int x, y;
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unsigned int left_mask;
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unsigned char* read;
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unsigned char* write;
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read = blit->read + (blit->xread >> 3);
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write = blit->write + blit->xwrite;
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left_mask = 0x80 >> (blit->xread & 7);
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y = blit->height;
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do
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{
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unsigned char* _read = read;
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unsigned char* _write = write;
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unsigned int mask = left_mask;
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unsigned int val = *_read;
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x = blit->width;
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do
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{
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if ( mask == 0x80 )
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val = *_read++;
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if ( val & mask )
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*_write = (unsigned char)color.value;
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mask >>= 1;
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if ( mask == 0 )
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mask = 0x80;
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_write++;
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x--;
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} while ( x > 0 );
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read += blit->read_line;
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write += blit->write_line;
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y--;
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} while ( y > 0 );
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}
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/**************************************************************************/
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/* */
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/* <Function> blit_mono_to_pal4 */
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/* */
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/**************************************************************************/
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static
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void blit_mono_to_pal4( grBlitter* blit,
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grColor color )
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{
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int x, y, phase;
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unsigned int left_mask;
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unsigned char* read;
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unsigned char* write;
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unsigned char col;
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col = color.value & 15;
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read = blit->read + (blit->xread >> 3);
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write = blit->write + (blit->xwrite >> 1);
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/* now begin blit */
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left_mask = 0x80 >> (blit->xread & 7);
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phase = blit->xwrite & 1;
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y = blit->height;
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do
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{
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unsigned char* _read = read;
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unsigned char* _write = write;
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unsigned int mask = left_mask;
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int _phase = phase;
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unsigned int val = *_read;
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x = blit->width;
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do
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{
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if ( mask == 0x80 )
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val = *_read++;
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if ( val & mask )
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{
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if ( _phase )
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*_write = (*_write & 0xF0) | col;
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else
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*_write = (*_write & 0x0F) | (col << 4);
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}
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mask >>= 1;
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if ( mask == 0 )
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mask = 0x80;
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_write += _phase;
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_phase ^= 1;
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x--;
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} while ( x > 0 );
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read += blit->read_line;
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write += blit->write_line;
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y--;
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} while ( y > 0 );
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}
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/**************************************************************************/
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/* */
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/* <Function> blit_mono_to_rgb16 */
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/* */
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/**************************************************************************/
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static
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void blit_mono_to_rgb16( grBlitter* blit,
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grColor color )
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{
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int x, y;
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unsigned int left_mask;
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unsigned char* read;
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unsigned char* write;
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read = blit->read + (blit->xread >> 3);
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write = blit->write + blit->xwrite*2;
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left_mask = 0x80 >> (blit->xread & 7);
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y = blit->height;
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do
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{
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unsigned char* _read = read;
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unsigned char* _write = write;
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unsigned int mask = left_mask;
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unsigned int val = *_read;
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x = blit->width;
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do
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{
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if ( mask == 0x80 )
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val = *_read++;
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if ( val & mask )
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*(short*)_write = (short)color.value;
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mask >>= 1;
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if ( mask == 0 )
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mask = 0x80;
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_write +=2;
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x--;
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} while ( x > 0 );
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read += blit->read_line;
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write += blit->write_line;
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y--;
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} while ( y > 0 );
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}
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/**************************************************************************/
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||
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/* */
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||
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/* <Function> blit_mono_to_rgb24 */
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||
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/* */
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||
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/**************************************************************************/
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||
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||
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static
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void blit_mono_to_rgb24( grBlitter* blit,
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grColor color )
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{
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int x, y;
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unsigned int left_mask;
|
||
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unsigned char* read;
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unsigned char* write;
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read = blit->read + (blit->xread >> 3);
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write = blit->write + blit->xwrite*3;
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left_mask = 0x80 >> (blit->xread & 7);
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y = blit->height;
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do
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||
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{
|
||
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unsigned char* _read = read;
|
||
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unsigned char* _write = write;
|
||
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unsigned int mask = left_mask;
|
||
|
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unsigned int val = *_read;
|
||
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|
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x = blit->width;
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||
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do
|
||
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{
|
||
|
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if ( mask == 0x80 )
|
||
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val = *_read++;
|
||
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||
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if ( val & mask )
|
||
|
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{
|
||
|
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_write[0] = color.chroma[0];
|
||
|
|
_write[1] = color.chroma[1];
|
||
|
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_write[2] = color.chroma[2];
|
||
|
|
}
|
||
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|
||
|
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mask >>= 1;
|
||
|
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if ( mask == 0 )
|
||
|
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mask = 0x80;
|
||
|
|
|
||
|
|
_write += 3;
|
||
|
|
x--;
|
||
|
|
} while ( x > 0 );
|
||
|
|
|
||
|
|
read += blit->read_line;
|
||
|
|
write += blit->write_line;
|
||
|
|
y--;
|
||
|
|
} while ( y > 0 );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* <Function> blit_mono_to_rgb32 */
|
||
|
|
/* */
|
||
|
|
/**************************************************************************/
|
||
|
|
|
||
|
|
static
|
||
|
|
void blit_mono_to_rgb32( grBlitter* blit,
|
||
|
|
grColor color )
|
||
|
|
{
|
||
|
|
int x, y;
|
||
|
|
unsigned int left_mask;
|
||
|
|
unsigned char* read;
|
||
|
|
unsigned char* write;
|
||
|
|
|
||
|
|
read = blit->read + (blit->xread >> 3);
|
||
|
|
write = blit->write + blit->xwrite*4;
|
||
|
|
|
||
|
|
left_mask = 0x80 >> (blit->xread & 7);
|
||
|
|
|
||
|
|
y = blit->height;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
unsigned char* _read = read;
|
||
|
|
unsigned char* _write = write;
|
||
|
|
unsigned int mask = left_mask;
|
||
|
|
unsigned int val = *_read;
|
||
|
|
|
||
|
|
x = blit->width;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
if ( mask == 0x80 )
|
||
|
|
val = *_read++;
|
||
|
|
|
||
|
|
if ( val & mask )
|
||
|
|
{
|
||
|
|
/* this could be greatly optimised as a *(long*)_write = color.value */
|
||
|
|
/* but this wouldn't work on 64-bits systems... stupid C types! */
|
||
|
|
_write[0] = color.chroma[0];
|
||
|
|
_write[1] = color.chroma[1];
|
||
|
|
_write[2] = color.chroma[2];
|
||
|
|
_write[3] = color.chroma[3];
|
||
|
|
}
|
||
|
|
|
||
|
|
mask >>= 1;
|
||
|
|
if ( mask == 0 )
|
||
|
|
mask = 0x80;
|
||
|
|
|
||
|
|
_write += 4;
|
||
|
|
x--;
|
||
|
|
} while ( x > 0 );
|
||
|
|
|
||
|
|
read += blit->read_line;
|
||
|
|
write += blit->write_line;
|
||
|
|
y--;
|
||
|
|
} while ( y > 0 );
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
static
|
||
|
|
const grBlitterFunc gr_mono_blitters[gr_pixel_mode_max] =
|
||
|
|
{
|
||
|
|
0,
|
||
|
|
blit_mono_to_mono,
|
||
|
|
blit_mono_to_pal4,
|
||
|
|
blit_mono_to_pal8,
|
||
|
|
blit_mono_to_pal8,
|
||
|
|
blit_mono_to_rgb16,
|
||
|
|
blit_mono_to_rgb16,
|
||
|
|
blit_mono_to_rgb24,
|
||
|
|
blit_mono_to_rgb32
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/*******************************************************************/
|
||
|
|
/* */
|
||
|
|
/* Saturation tables */
|
||
|
|
/* */
|
||
|
|
/*******************************************************************/
|
||
|
|
|
||
|
|
typedef struct grSaturation_
|
||
|
|
{
|
||
|
|
int count;
|
||
|
|
const byte* table;
|
||
|
|
|
||
|
|
} grSaturation;
|
||
|
|
|
||
|
|
|
||
|
|
static
|
||
|
|
const byte gr_saturation_5[8] = { 0, 1, 2, 3, 4, 4, 4, 4 };
|
||
|
|
|
||
|
|
|
||
|
|
static
|
||
|
|
const byte gr_saturation_17[32] =
|
||
|
|
{
|
||
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
|
||
|
|
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16,
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
static
|
||
|
|
grSaturation gr_saturations[ GR_MAX_SATURATIONS ] =
|
||
|
|
{
|
||
|
|
{ 5, gr_saturation_5 },
|
||
|
|
{ 17, gr_saturation_17 }
|
||
|
|
};
|
||
|
|
|
||
|
|
static
|
||
|
|
int gr_num_saturations = 2;
|
||
|
|
|
||
|
|
static
|
||
|
|
grSaturation* gr_last_saturation = gr_saturations;
|
||
|
|
|
||
|
|
|
||
|
|
extern
|
||
|
|
const byte* grGetSaturation( int num_grays )
|
||
|
|
{
|
||
|
|
/* first of all, scan the current saturations table */
|
||
|
|
grSaturation* sat = gr_saturations;
|
||
|
|
grSaturation* limit = sat + gr_num_saturations;
|
||
|
|
|
||
|
|
if ( num_grays < 2 )
|
||
|
|
{
|
||
|
|
grError = gr_err_bad_argument;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
for ( ; sat < limit; sat++ )
|
||
|
|
{
|
||
|
|
if ( sat->count == num_grays )
|
||
|
|
{
|
||
|
|
gr_last_saturation = sat;
|
||
|
|
return sat->table;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* not found, simply create a new entry if there is room */
|
||
|
|
if (gr_num_saturations < GR_MAX_SATURATIONS)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
const byte* table;
|
||
|
|
|
||
|
|
table = (const byte*)grAlloc( (3*num_grays-1)*sizeof(byte) );
|
||
|
|
if (!table) return 0;
|
||
|
|
|
||
|
|
sat->count = num_grays;
|
||
|
|
sat->table = table;
|
||
|
|
|
||
|
|
for ( i = 0; i < num_grays; i++, table++ )
|
||
|
|
*(unsigned char*)table = (unsigned char)i;
|
||
|
|
|
||
|
|
for ( i = 2*num_grays-1; i > 0; i--, table++ )
|
||
|
|
*(unsigned char*)table = (unsigned char)(num_grays-1);
|
||
|
|
|
||
|
|
gr_num_saturations++;
|
||
|
|
gr_last_saturation = sat;
|
||
|
|
return sat->table;
|
||
|
|
}
|
||
|
|
grError = gr_err_saturation_overflow;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/*******************************************************************/
|
||
|
|
/* */
|
||
|
|
/* conversion tables */
|
||
|
|
/* */
|
||
|
|
/*******************************************************************/
|
||
|
|
|
||
|
|
typedef struct grConversion_
|
||
|
|
{
|
||
|
|
int target_grays;
|
||
|
|
int source_grays;
|
||
|
|
const byte* table;
|
||
|
|
|
||
|
|
} grConversion;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
static
|
||
|
|
const byte gr_gray5_to_gray17[5] = { 0, 4, 8, 12, 16 };
|
||
|
|
|
||
|
|
|
||
|
|
static
|
||
|
|
const byte gr_gray5_to_gray128[5] = { 0, 32, 64, 96, 127 };
|
||
|
|
|
||
|
|
|
||
|
|
static
|
||
|
|
const unsigned char gr_gray17_to_gray128[17] =
|
||
|
|
{
|
||
|
|
0, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 88, 96, 104, 112, 120, 127
|
||
|
|
};
|
||
|
|
|
||
|
|
static
|
||
|
|
grConversion gr_conversions[ GR_MAX_CONVERSIONS ] =
|
||
|
|
{
|
||
|
|
{ 17, 5, gr_gray5_to_gray17 },
|
||
|
|
{ 128, 5, gr_gray5_to_gray128 },
|
||
|
|
{ 128, 17, gr_gray17_to_gray128 }
|
||
|
|
};
|
||
|
|
|
||
|
|
static
|
||
|
|
int gr_num_conversions = 3;
|
||
|
|
|
||
|
|
static
|
||
|
|
grConversion* gr_last_conversion = gr_conversions;
|
||
|
|
|
||
|
|
|
||
|
|
extern
|
||
|
|
const byte* grGetConversion( int target_grays,
|
||
|
|
int source_grays )
|
||
|
|
{
|
||
|
|
grConversion* conv = gr_conversions;
|
||
|
|
grConversion* limit = conv + gr_num_conversions;
|
||
|
|
|
||
|
|
if ( target_grays < 2 || source_grays < 2 )
|
||
|
|
{
|
||
|
|
grError = gr_err_bad_argument;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* otherwise, scan table */
|
||
|
|
for ( ; conv < limit; conv++ )
|
||
|
|
{
|
||
|
|
if ( conv->target_grays == target_grays &&
|
||
|
|
conv->source_grays == source_grays )
|
||
|
|
{
|
||
|
|
gr_last_conversion = conv;
|
||
|
|
return conv->table;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* not found, add a new conversion to the table */
|
||
|
|
if (gr_num_conversions < GR_MAX_CONVERSIONS)
|
||
|
|
{
|
||
|
|
const byte* table;
|
||
|
|
int n;
|
||
|
|
|
||
|
|
table = (const byte*)grAlloc( source_grays*sizeof(byte) );
|
||
|
|
if (!table)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
conv->target_grays = target_grays;
|
||
|
|
conv->source_grays = source_grays;
|
||
|
|
conv->table = table;
|
||
|
|
|
||
|
|
for ( n = 0; n < source_grays; n++ )
|
||
|
|
((unsigned char*)table)[n] = (unsigned char)(n*(target_grays-1)) /
|
||
|
|
(source_grays-1);
|
||
|
|
|
||
|
|
gr_num_conversions++;
|
||
|
|
gr_last_conversion = conv;
|
||
|
|
return table;
|
||
|
|
}
|
||
|
|
grError = gr_err_conversion_overflow;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* <Function> blit_gray_to_gray */
|
||
|
|
/* */
|
||
|
|
/**************************************************************************/
|
||
|
|
|
||
|
|
static
|
||
|
|
void blit_gray_to_gray( grBlitter* blit,
|
||
|
|
const byte* saturation,
|
||
|
|
const byte* conversion )
|
||
|
|
{
|
||
|
|
int y;
|
||
|
|
unsigned char* read;
|
||
|
|
unsigned char* write;
|
||
|
|
unsigned char max1;
|
||
|
|
unsigned char max2;
|
||
|
|
|
||
|
|
max1 = (unsigned char)(blit->source.grays-1);
|
||
|
|
max2 = (unsigned char)(blit->target.grays-1);
|
||
|
|
|
||
|
|
read = (unsigned char*)blit->read + blit->xread;
|
||
|
|
write = (unsigned char*)blit->write + blit->xwrite;
|
||
|
|
|
||
|
|
y = blit->height;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
unsigned char* _read = read;
|
||
|
|
unsigned char* _write = write;
|
||
|
|
int x = blit->width;
|
||
|
|
|
||
|
|
while (x > 0)
|
||
|
|
{
|
||
|
|
#ifdef GR_CONFIG_GRAY_SKIP_WHITE
|
||
|
|
unsigned char val = *_read;
|
||
|
|
|
||
|
|
if (val)
|
||
|
|
{
|
||
|
|
if (val == max)
|
||
|
|
*_write = max2;
|
||
|
|
else
|
||
|
|
*_write = saturation[ (int)*_write + conversion[ *_read ] ];
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
*_write = saturation[ (int)*_write + conversion[ *_read ] ];
|
||
|
|
#endif
|
||
|
|
_write++;
|
||
|
|
_read++;
|
||
|
|
x--;
|
||
|
|
}
|
||
|
|
|
||
|
|
read += blit->read_line;
|
||
|
|
write += blit->write_line;
|
||
|
|
y--;
|
||
|
|
}
|
||
|
|
while (y > 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* <Function> blit_gray_to_gray_simple */
|
||
|
|
/* */
|
||
|
|
/**************************************************************************/
|
||
|
|
|
||
|
|
static
|
||
|
|
void blit_gray_to_gray_simple( grBlitter* blit,
|
||
|
|
const byte* saturation )
|
||
|
|
{
|
||
|
|
int y;
|
||
|
|
unsigned char* read;
|
||
|
|
unsigned char* write;
|
||
|
|
unsigned char max;
|
||
|
|
|
||
|
|
max = (unsigned char)(blit->source.grays-1);
|
||
|
|
|
||
|
|
read = (unsigned char*)blit->read + blit->xread;
|
||
|
|
write = (unsigned char*)blit->write + blit->xwrite;
|
||
|
|
|
||
|
|
y = blit->height;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
unsigned char* _read = read;
|
||
|
|
unsigned char* _write = write;
|
||
|
|
int x = blit->width;
|
||
|
|
|
||
|
|
while (x > 0)
|
||
|
|
{
|
||
|
|
#ifdef GR_CONFIG_GRAY_SKIP_WHITE
|
||
|
|
unsigned char val = *_read;
|
||
|
|
|
||
|
|
if (val)
|
||
|
|
{
|
||
|
|
if (val == max)
|
||
|
|
*_write = val;
|
||
|
|
else
|
||
|
|
*_write = saturation[ (int)*_write + *_read ];
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
*_write = saturation[ (int)*_write + *_read ];
|
||
|
|
#endif
|
||
|
|
_write++;
|
||
|
|
_read++;
|
||
|
|
x--;
|
||
|
|
}
|
||
|
|
|
||
|
|
read += blit->read_line;
|
||
|
|
write += blit->write_line;
|
||
|
|
y--;
|
||
|
|
}
|
||
|
|
while (y > 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#define compose_pixel( a, b, n, max ) \
|
||
|
|
{ \
|
||
|
|
int d, half = max >> 1; \
|
||
|
|
\
|
||
|
|
d = (int)b.chroma[0] - a.chroma[0]; \
|
||
|
|
a.chroma[0] += (n*d + half)/max; \
|
||
|
|
\
|
||
|
|
d = (int)b.chroma[1] - a.chroma[1]; \
|
||
|
|
a.chroma[1] += (n*d + half)/max; \
|
||
|
|
\
|
||
|
|
d = (int)b.chroma[2] - a.chroma[2]; \
|
||
|
|
a.chroma[2] += (n*d + half)/max; \
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#define extract555( pixel, color ) \
|
||
|
|
color.chroma[0] = (pixel >> 10) & 0x1F; \
|
||
|
|
color.chroma[1] = (pixel >> 5) & 0x1F; \
|
||
|
|
color.chroma[2] = (pixel ) & 0x1F;
|
||
|
|
|
||
|
|
|
||
|
|
#define extract565( pixel, color ) \
|
||
|
|
color.chroma[0] = (pixel >> 11) & 0x1F; \
|
||
|
|
color.chroma[1] = (pixel >> 5) & 0x3F; \
|
||
|
|
color.chroma[2] = (pixel ) & 0x1F;
|
||
|
|
|
||
|
|
|
||
|
|
#define inject555( color ) \
|
||
|
|
( ( (unsigned short)color.chroma[0] << 10 ) | \
|
||
|
|
( (unsigned short)color.chroma[1] << 5 ) | \
|
||
|
|
color.chroma[2] )
|
||
|
|
|
||
|
|
|
||
|
|
#define inject565( color ) \
|
||
|
|
( ( (unsigned short)color.chroma[0] << 11 ) | \
|
||
|
|
( (unsigned short)color.chroma[1] << 5 ) | \
|
||
|
|
color.chroma[2] )
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* <Function> blit_gray_to_555 */
|
||
|
|
/* */
|
||
|
|
/**************************************************************************/
|
||
|
|
|
||
|
|
static
|
||
|
|
void blit_gray_to_555( grBlitter* blit,
|
||
|
|
grColor color,
|
||
|
|
int max )
|
||
|
|
{
|
||
|
|
int y;
|
||
|
|
unsigned char* read;
|
||
|
|
unsigned char* write;
|
||
|
|
long color2;
|
||
|
|
|
||
|
|
read = blit->read + blit->xread;
|
||
|
|
write = blit->write + 2*blit->xwrite;
|
||
|
|
|
||
|
|
/* convert color to R:G:B triplet */
|
||
|
|
color2 = color.value;
|
||
|
|
extract555( color2, color );
|
||
|
|
|
||
|
|
y = blit->height;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
unsigned char* _read = read;
|
||
|
|
unsigned char* _write = write;
|
||
|
|
int x = blit->width;
|
||
|
|
|
||
|
|
while (x > 0)
|
||
|
|
{
|
||
|
|
unsigned char val;
|
||
|
|
|
||
|
|
val = *_read;
|
||
|
|
if (val)
|
||
|
|
{
|
||
|
|
unsigned short* pixel = (unsigned short*)_write;
|
||
|
|
|
||
|
|
if (val == max)
|
||
|
|
{
|
||
|
|
pixel[0] = (short)color2;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* compose gray value */
|
||
|
|
unsigned short pix16 = *pixel;
|
||
|
|
grColor pix;
|
||
|
|
|
||
|
|
extract555( pix16, pix );
|
||
|
|
|
||
|
|
compose_pixel( pix, color, val, max );
|
||
|
|
*pixel = inject555(pix);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
_write += 2;
|
||
|
|
_read ++;
|
||
|
|
x--;
|
||
|
|
}
|
||
|
|
|
||
|
|
read += blit->read_line;
|
||
|
|
write += blit->write_line;
|
||
|
|
y--;
|
||
|
|
}
|
||
|
|
while (y > 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* <Function> blit_gray_to_565 */
|
||
|
|
/* */
|
||
|
|
/**************************************************************************/
|
||
|
|
|
||
|
|
static
|
||
|
|
void blit_gray_to_565( grBlitter* blit,
|
||
|
|
grColor color,
|
||
|
|
int max )
|
||
|
|
{
|
||
|
|
int y;
|
||
|
|
unsigned char* read;
|
||
|
|
unsigned char* write;
|
||
|
|
long color2;
|
||
|
|
|
||
|
|
read = blit->read + blit->xread;
|
||
|
|
write = blit->write + 2*blit->xwrite;
|
||
|
|
|
||
|
|
color2 = color.value;
|
||
|
|
extract565( color2, color );
|
||
|
|
|
||
|
|
y = blit->height;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
unsigned char* _read = read;
|
||
|
|
unsigned char* _write = write;
|
||
|
|
int x = blit->width;
|
||
|
|
|
||
|
|
while (x > 0)
|
||
|
|
{
|
||
|
|
unsigned char val;
|
||
|
|
|
||
|
|
val = *_read;
|
||
|
|
if (val)
|
||
|
|
{
|
||
|
|
unsigned short* pixel = (unsigned short*)_write;
|
||
|
|
|
||
|
|
if (val == max)
|
||
|
|
{
|
||
|
|
pixel[0] = (short)color2;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* compose gray value */
|
||
|
|
unsigned short pix16 = *pixel;
|
||
|
|
grColor pix;
|
||
|
|
|
||
|
|
extract565( pix16, pix );
|
||
|
|
|
||
|
|
compose_pixel( pix, color, val, max );
|
||
|
|
*pixel = inject565( pix );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
_write +=2;
|
||
|
|
_read ++;
|
||
|
|
x--;
|
||
|
|
}
|
||
|
|
|
||
|
|
read += blit->read_line;
|
||
|
|
write += blit->write_line;
|
||
|
|
y--;
|
||
|
|
}
|
||
|
|
while (y > 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* <Function> blit_gray_to_24 */
|
||
|
|
/* */
|
||
|
|
/**************************************************************************/
|
||
|
|
|
||
|
|
static
|
||
|
|
void blit_gray_to_24( grBlitter* blit,
|
||
|
|
grColor color,
|
||
|
|
int max )
|
||
|
|
{
|
||
|
|
int y;
|
||
|
|
unsigned char* read;
|
||
|
|
unsigned char* write;
|
||
|
|
|
||
|
|
read = blit->read + blit->xread;
|
||
|
|
write = blit->write + 3*blit->xwrite;
|
||
|
|
|
||
|
|
y = blit->height;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
unsigned char* _read = read;
|
||
|
|
unsigned char* _write = write;
|
||
|
|
int x = blit->width;
|
||
|
|
|
||
|
|
while (x > 0)
|
||
|
|
{
|
||
|
|
unsigned char val;
|
||
|
|
|
||
|
|
val = *_read;
|
||
|
|
if (val)
|
||
|
|
{
|
||
|
|
if (val == max)
|
||
|
|
{
|
||
|
|
_write[0] = color.chroma[0];
|
||
|
|
_write[1] = color.chroma[1];
|
||
|
|
_write[2] = color.chroma[2];
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* compose gray value */
|
||
|
|
grColor pix;
|
||
|
|
|
||
|
|
pix.chroma[0] = _write[0];
|
||
|
|
pix.chroma[1] = _write[1];
|
||
|
|
pix.chroma[2] = _write[2];
|
||
|
|
|
||
|
|
compose_pixel( pix, color, val, max );
|
||
|
|
|
||
|
|
_write[0] = pix.chroma[0];
|
||
|
|
_write[1] = pix.chroma[1];
|
||
|
|
_write[2] = pix.chroma[2];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
_write += 3;
|
||
|
|
_read ++;
|
||
|
|
x--;
|
||
|
|
}
|
||
|
|
|
||
|
|
read += blit->read_line;
|
||
|
|
write += blit->write_line;
|
||
|
|
y--;
|
||
|
|
}
|
||
|
|
while (y > 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**************************************************************************/
|
||
|
|
/* */
|
||
|
|
/* <Function> blit_gray_to_32 */
|
||
|
|
/* */
|
||
|
|
/**************************************************************************/
|
||
|
|
|
||
|
|
static
|
||
|
|
void blit_gray_to_32( grBlitter* blit,
|
||
|
|
grColor color,
|
||
|
|
int max )
|
||
|
|
{
|
||
|
|
int y;
|
||
|
|
unsigned char* read;
|
||
|
|
unsigned char* write;
|
||
|
|
|
||
|
|
read = blit->read + blit->xread;
|
||
|
|
write = blit->write + 4*blit->xwrite;
|
||
|
|
|
||
|
|
y = blit->height;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
unsigned char* _read = read;
|
||
|
|
unsigned char* _write = write;
|
||
|
|
int x = blit->width;
|
||
|
|
|
||
|
|
while (x > 0)
|
||
|
|
{
|
||
|
|
unsigned char val;
|
||
|
|
|
||
|
|
val = *_read;
|
||
|
|
if (val)
|
||
|
|
{
|
||
|
|
if (val == max)
|
||
|
|
{
|
||
|
|
_write[0] = color.chroma[0];
|
||
|
|
_write[1] = color.chroma[1];
|
||
|
|
_write[2] = color.chroma[2];
|
||
|
|
_write[3] = color.chroma[3];
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* compose gray value */
|
||
|
|
grColor pix;
|
||
|
|
|
||
|
|
pix.chroma[0] = _write[0];
|
||
|
|
pix.chroma[1] = _write[1];
|
||
|
|
pix.chroma[2] = _write[2];
|
||
|
|
|
||
|
|
compose_pixel( pix, color, val, max );
|
||
|
|
|
||
|
|
_write[0] = pix.chroma[0];
|
||
|
|
_write[1] = pix.chroma[1];
|
||
|
|
_write[2] = pix.chroma[2];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
_write += 4;
|
||
|
|
_read ++;
|
||
|
|
x--;
|
||
|
|
}
|
||
|
|
|
||
|
|
read += blit->read_line;
|
||
|
|
write += blit->write_line;
|
||
|
|
y--;
|
||
|
|
}
|
||
|
|
while (y > 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/**********************************************************************
|
||
|
|
*
|
||
|
|
* <Function>
|
||
|
|
* grBlitGlyphBitmap
|
||
|
|
*
|
||
|
|
* <Description>
|
||
|
|
* writes a given glyph bitmap to a target surface.
|
||
|
|
*
|
||
|
|
* <Input>
|
||
|
|
* surface :: handle to target surface
|
||
|
|
* x :: position of left-most pixel of glyph image in surface
|
||
|
|
* y :: position of top-most pixel of glyph image in surface
|
||
|
|
* bitmap :: source glyph image
|
||
|
|
*
|
||
|
|
* <Return>
|
||
|
|
* Error code. 0 means success
|
||
|
|
*
|
||
|
|
**********************************************************************/
|
||
|
|
|
||
|
|
typedef void (*grColorGlyphBlitter)( grBlitter* blit,
|
||
|
|
grColor color,
|
||
|
|
int max_gray );
|
||
|
|
|
||
|
|
static
|
||
|
|
const grColorGlyphBlitter gr_color_blitters[gr_pixel_mode_max] =
|
||
|
|
{
|
||
|
|
0,
|
||
|
|
0,
|
||
|
|
0,
|
||
|
|
0,
|
||
|
|
blit_gray_to_555,
|
||
|
|
blit_gray_to_565,
|
||
|
|
blit_gray_to_24,
|
||
|
|
blit_gray_to_32
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
extern int grBlitGlyphToBitmap( grBitmap* target,
|
||
|
|
grBitmap* glyph,
|
||
|
|
grPos x,
|
||
|
|
grPos y,
|
||
|
|
grColor color )
|
||
|
|
{
|
||
|
|
grBlitter blit;
|
||
|
|
grPixelMode mode;
|
||
|
|
|
||
|
|
/* check arguments */
|
||
|
|
if (!target || !glyph)
|
||
|
|
{
|
||
|
|
grError = gr_err_bad_argument;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* set up blitter and compute clipping. Return immediately if needed */
|
||
|
|
blit.source = *glyph;
|
||
|
|
blit.target = *target;
|
||
|
|
mode = target->mode;
|
||
|
|
|
||
|
|
if ( compute_clips( &blit, x, y ) )
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
|
||
|
|
/* handle monochrome bitmap blitting */
|
||
|
|
if (glyph->mode == gr_pixel_mode_mono)
|
||
|
|
{
|
||
|
|
if ( mode <= gr_pixel_mode_none || mode >= gr_pixel_mode_max )
|
||
|
|
{
|
||
|
|
grError = gr_err_bad_source_depth;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
gr_mono_blitters[mode]( &blit, color );
|
||
|
|
goto End;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* handle gray bitmap composition */
|
||
|
|
if (glyph->mode == gr_pixel_mode_gray &&
|
||
|
|
glyph->grays > 1 )
|
||
|
|
{
|
||
|
|
int target_grays = target->grays;
|
||
|
|
int source_grays = glyph->grays;
|
||
|
|
const byte* saturation;
|
||
|
|
|
||
|
|
if ( mode == gr_pixel_mode_gray && target_grays > 1 )
|
||
|
|
{
|
||
|
|
/* rendering into a gray target - use special composition */
|
||
|
|
/* routines.. */
|
||
|
|
if ( gr_last_saturation->count == target_grays )
|
||
|
|
saturation = gr_last_saturation->table;
|
||
|
|
else
|
||
|
|
{
|
||
|
|
saturation = grGetSaturation( target_grays );
|
||
|
|
if (!saturation) return -3;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
if ( target_grays == source_grays )
|
||
|
|
blit_gray_to_gray_simple( &blit, saturation );
|
||
|
|
else
|
||
|
|
{
|
||
|
|
const byte* conversion;
|
||
|
|
|
||
|
|
if ( gr_last_conversion->target_grays == target_grays &&
|
||
|
|
gr_last_conversion->source_grays == source_grays )
|
||
|
|
conversion = gr_last_conversion->table;
|
||
|
|
else
|
||
|
|
{
|
||
|
|
conversion = grGetConversion( target_grays, source_grays );
|
||
|
|
if (!conversion) return -3;
|
||
|
|
};
|
||
|
|
|
||
|
|
blit_gray_to_gray( &blit, saturation, conversion );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
/* rendering into a color target */
|
||
|
|
if ( mode <= gr_pixel_mode_gray ||
|
||
|
|
mode >= gr_pixel_mode_max )
|
||
|
|
{
|
||
|
|
grError = gr_err_bad_target_depth;
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
gr_color_blitters[mode]( &blit, color, source_grays-1 );
|
||
|
|
}
|
||
|
|
goto End;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* we don't support the blitting of bitmaps of the following */
|
||
|
|
/* types : pal4, pal8, rgb555, rgb565, rgb24, rgb32 */
|
||
|
|
/* */
|
||
|
|
grError = gr_err_bad_source_depth;
|
||
|
|
return -2;
|
||
|
|
|
||
|
|
End:
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
/* End */
|