170 lines
5.3 KiB
C
170 lines
5.3 KiB
C
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#ifndef _GUAC_RDP_RDP_GLYPH_H
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#define _GUAC_RDP_RDP_GLYPH_H
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#include "config.h"
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#include <cairo/cairo.h>
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#include <freerdp/freerdp.h>
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#ifdef ENABLE_WINPR
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#include <winpr/wtypes.h>
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#else
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#include "compat/winpr-wtypes.h"
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#endif
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/**
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* Guacamole-specific rdpGlyph data.
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*/
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typedef struct guac_rdp_glyph {
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/**
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* FreeRDP glyph data - MUST GO FIRST.
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*/
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rdpGlyph glyph;
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/**
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* Cairo surface layer containing cached image data.
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*/
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cairo_surface_t* surface;
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} guac_rdp_glyph;
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/**
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* Caches the given glyph. Note that this caching currently only occurs server-
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* side, as it is more efficient to transmit the text as PNG.
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*
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* @param context
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* The rdpContext associated with the current RDP session.
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*
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* @param glyph
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* The glyph to cache.
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*/
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void guac_rdp_glyph_new(rdpContext* context, rdpGlyph* glyph);
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/**
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* Draws a previously-cached glyph at the given coordinates within the current
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* drawing surface.
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*
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* @param context
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* The rdpContext associated with the current RDP session.
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*
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* @param glyph
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* The cached glyph to draw.
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*
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* @param x
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* The destination X coordinate of the upper-left corner of the glyph.
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*
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* @param y
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* The destination Y coordinate of the upper-left corner of the glyph.
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*/
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void guac_rdp_glyph_draw(rdpContext* context, rdpGlyph* glyph, int x, int y);
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/**
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* Frees any Guacamole-specific data associated with the given glyph, such that
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* it can be safely freed by FreeRDP.
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*
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* @param context
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* The rdpContext associated with the current RDP session.
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*
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* @param glyph
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* The cached glyph to free.
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*/
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void guac_rdp_glyph_free(rdpContext* context, rdpGlyph* glyph);
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/**
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* Called just prior to rendering a series of glyphs. After this function is
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* called, the glyphs will be individually rendered by calls to
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* guac_rdp_glyph_draw().
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*
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* @param context
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* The rdpContext associated with the current RDP session.
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*
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* @param x
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* The X coordinate of the upper-left corner of the background rectangle of
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* the drawing operation, or 0 if the background is transparent.
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*
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* @param y
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* The Y coordinate of the upper-left corner of the background rectangle of
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* the drawing operation, or 0 if the background is transparent.
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*
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* @param width
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* The width of the background rectangle of the drawing operation, or 0 if
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* the background is transparent.
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*
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* @param height
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* The height of the background rectangle of the drawing operation, or 0 if
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* the background is transparent.
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*
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* @param fgcolor
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* The foreground color of each glyph. This color will be in the colorspace
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* of the RDP session, and may even be a palette index, and must be
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* translated via guac_rdp_convert_color().
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*
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* @param bgcolor
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* The background color of the drawing area. This color will be in the
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* colorspace of the RDP session, and may even be a palette index, and must
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* be translated via guac_rdp_convert_color(). If the background is
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* transparent, this value is undefined.
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*/
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void guac_rdp_glyph_begindraw(rdpContext* context,
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int x, int y, int width, int height, UINT32 fgcolor, UINT32 bgcolor);
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/**
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* Called immediately after rendering a series of glyphs. Unlike
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* guac_rdp_glyph_begindraw(), there is no way to detect through any invocation
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* of this function whether the background color is opaque or transparent. We
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* currently do NOT implement this function.
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*
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* @param context
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* The rdpContext associated with the current RDP session.
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*
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* @param x
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* The X coordinate of the upper-left corner of the background rectangle of
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* the drawing operation.
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*
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* @param y
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* The Y coordinate of the upper-left corner of the background rectangle of
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* the drawing operation.
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*
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* @param width
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* The width of the background rectangle of the drawing operation.
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*
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* @param height
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* The height of the background rectangle of the drawing operation.
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*
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* @param fgcolor
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* The foreground color of each glyph. This color will be in the colorspace
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* of the RDP session, and may even be a palette index, and must be
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* translated via guac_rdp_convert_color().
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*
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* @param bgcolor
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* The background color of the drawing area. This color will be in the
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* colorspace of the RDP session, and may even be a palette index, and must
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* be translated via guac_rdp_convert_color(). If the background is
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* transparent, this value is undefined.
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*/
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void guac_rdp_glyph_enddraw(rdpContext* context,
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int x, int y, int width, int height, UINT32 fgcolor, UINT32 bgcolor);
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#endif
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