Edit
IABSD.fr/xenocara/lib/xcb-util-renderutil/renderutil/glyph.c
matthieu
- lib/xcb-util-renderutil/renderutil/glyph.c
-
/* Copyright © 2006 Ian Osgood * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the names of the authors or their * institutions shall not be used in advertising or otherwise to promote the * sale, use or other dealings in this Software without prior written * authorization from the authors. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <stdlib.h> #include <string.h> #include "xcb_renderutil.h" typedef struct _glyph_header_t { uint8_t count; uint8_t pad0[3]; int16_t dx, dy; } _glyph_header_t; /* implementation of the opaque stream */ struct xcb_render_util_composite_text_stream_t { /* state info */ uint32_t glyph_size; /* 0 for unset, 1/2/4 for 8/16/32 */ xcb_render_glyphset_t initial_glyphset; xcb_render_glyphset_t current_glyphset; /* dynamically allocated stream */ /* contents are 32-bit aligned, network byte order */ size_t stream_len; uint32_t *stream; uint32_t *current; }; #define CURRENT_LEN(s) (((char *)s->current - (char *)s->stream)) xcb_render_util_composite_text_stream_t * xcb_render_util_composite_text_stream ( xcb_render_glyphset_t initial_glyphset, uint32_t total_glyphs, uint32_t total_glyphset_changes ) { xcb_render_util_composite_text_stream_t *stream; size_t size = 32; /* assume worst case: each glyph has its own dx,dy */ if (total_glyphs || total_glyphset_changes) { size = total_glyphs * 3 * sizeof(uint32_t) + total_glyphset_changes * 3 * sizeof(uint32_t); } stream = malloc(sizeof(xcb_render_util_composite_text_stream_t)); if (!stream) return NULL; stream->glyph_size = 0; stream->initial_glyphset = initial_glyphset; stream->current_glyphset = initial_glyphset; stream->stream_len = size; stream->stream = malloc(size); stream->current = stream->stream; return stream; } static void _grow_stream( xcb_render_util_composite_text_stream_t *stream, size_t increase ) { size_t current_len = CURRENT_LEN(stream); if (current_len + increase > stream->stream_len) { uint32_t *s = realloc(stream->stream, 2 * stream->stream_len); if (s != NULL) { stream->stream_len *= 2; stream->stream = s; stream->current = stream->stream + (current_len>>2); } } } void xcb_render_util_glyphs_8 ( xcb_render_util_composite_text_stream_t *stream, int16_t dx, int16_t dy, uint32_t count, const uint8_t *glyphs ) { _glyph_header_t header = { count, {0,0,0}, dx, dy }; if (count > 252) return; /* FIXME */ if (stream->glyph_size != sizeof(*glyphs)) { if (stream->glyph_size != 0) return; stream->glyph_size = sizeof(*glyphs); } _grow_stream(stream, sizeof(header) + count+3); memcpy(stream->current, &header, sizeof(header)); stream->current += 2; memcpy(stream->current, glyphs, header.count); stream->current += ((int)header.count+3)>>2; } void xcb_render_util_glyphs_16 ( xcb_render_util_composite_text_stream_t *stream, int16_t dx, int16_t dy, uint32_t count, const uint16_t *glyphs ) { _glyph_header_t header = { count, {0,0,0}, dx, dy }; if (count > 254) return; /* FIXME */ if (stream->glyph_size != sizeof(*glyphs)) { if (stream->glyph_size != 0) return; stream->glyph_size = sizeof(*glyphs); } _grow_stream(stream, sizeof(header) + count*sizeof(*glyphs)+1); memcpy(stream->current, &header, sizeof(header)); stream->current += 2; memcpy(stream->current, glyphs, header.count*sizeof(*glyphs)); stream->current += ((int)header.count*sizeof(*glyphs)+3)>>2; } void xcb_render_util_glyphs_32 ( xcb_render_util_composite_text_stream_t *stream, int16_t dx, int16_t dy, uint32_t count, const uint32_t *glyphs ) { _glyph_header_t header = { count, {0,0,0}, dx, dy }; if (count > 254) return; /* FIXME */ if (stream->glyph_size != sizeof(*glyphs)) { if (stream->glyph_size != 0) return; stream->glyph_size = sizeof(*glyphs); } _grow_stream(stream, sizeof(header) + count*sizeof(*glyphs)+1); memcpy(stream->current, &header, sizeof(header)); stream->current += 2; memcpy(stream->current, glyphs, header.count*sizeof(*glyphs)); stream->current += header.count; } /* note: these glyph arrays must be swapped to network byte order */ void xcb_render_util_change_glyphset ( xcb_render_util_composite_text_stream_t *stream, xcb_render_glyphset_t glyphset ) { static _glyph_header_t header = { 255, {0,0,0}, 0, 0 }; if (glyphset == stream->current_glyphset) return; _grow_stream(stream, 3*sizeof(uint32_t)); memcpy(stream->current, &header, sizeof(header)); stream->current += 2; *stream->current = glyphset; stream->current++; stream->current_glyphset = glyphset; } typedef xcb_void_cookie_t (*xcb_render_composite_glyphs_func) (xcb_connection_t *c, uint8_t op, xcb_render_picture_t src, xcb_render_picture_t dst, xcb_render_pictformat_t mask_format, xcb_render_glyphset_t glyphset, int16_t src_x, int16_t src_y, uint32_t glyphcmds_len, const uint8_t *glyphcmds); xcb_void_cookie_t xcb_render_util_composite_text ( xcb_connection_t *xc, uint8_t op, xcb_render_picture_t src, xcb_render_picture_t dst, xcb_render_pictformat_t mask_format, int16_t src_x, int16_t src_y, xcb_render_util_composite_text_stream_t *stream ) { xcb_render_composite_glyphs_func f; switch (stream->glyph_size) { case 1: f = xcb_render_composite_glyphs_8; break; case 2: f = xcb_render_composite_glyphs_16; break; case 4: f = xcb_render_composite_glyphs_32; break; default: /* uninitialized */ return xcb_no_operation(xc); } return f( xc, op, src, dst, mask_format, stream->initial_glyphset, src_x, src_y, CURRENT_LEN(stream), (uint8_t *)stream->stream ); } xcb_void_cookie_t xcb_render_util_composite_text_checked ( xcb_connection_t *xc, uint8_t op, xcb_render_picture_t src, xcb_render_picture_t dst, xcb_render_pictformat_t mask_format, int16_t src_x, int16_t src_y, xcb_render_util_composite_text_stream_t *stream ) { xcb_render_composite_glyphs_func f; switch (stream->glyph_size) { case 1: f = xcb_render_composite_glyphs_8_checked; break; case 2: f = xcb_render_composite_glyphs_16_checked; break; case 4: f = xcb_render_composite_glyphs_32_checked; break; default: /* uninitialized */ return xcb_no_operation_checked(xc); } return f( xc, op, src, dst, mask_format, stream->initial_glyphset, src_x, src_y, CURRENT_LEN(stream), (uint8_t *)stream->stream ); } void xcb_render_util_composite_text_free ( xcb_render_util_composite_text_stream_t *stream ) { free(stream->stream); free(stream); }