mirror of
https://github.com/netsurf-browser/netsurf
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151 lines
3.6 KiB
C
151 lines
3.6 KiB
C
/*
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* This file is part of NetSurf, http://netsurf-browser.org/
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* Licensed under the GNU General Public License,
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* http://www.opensource.org/licenses/gpl-license
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* Copyright 2003 John M Bell <jmb202@ecs.soton.ac.uk>
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*/
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/** \file
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* Content for image/x-riscos-sprite (RISC OS implementation).
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*
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* No conversion is necessary: we can render RISC OS sprites directly under
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* RISC OS.
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*
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* Unfortunately we have to make a copy of the bitmap data, because sprite areas
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* need a length word at the start.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include "oslib/osspriteop.h"
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#include "netsurf/utils/config.h"
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#include "netsurf/desktop/plotters.h"
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#include "netsurf/content/content.h"
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#include "netsurf/riscos/gui.h"
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#include "netsurf/riscos/image.h"
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#include "netsurf/riscos/sprite.h"
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#include "netsurf/utils/log.h"
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#include "netsurf/utils/messages.h"
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#include "netsurf/utils/utils.h"
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#ifdef WITH_SPRITE
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/**
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* Convert a CONTENT_SPRITE for display.
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*
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* No conversion is necessary. We merely read the sprite dimensions.
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*/
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bool sprite_convert(struct content *c, int width, int height)
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{
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os_error *error;
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int w, h;
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union content_msg_data msg_data;
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char *source_data;
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source_data = ((char *)c->source_data) - 4;
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osspriteop_area *area = (osspriteop_area*)source_data;
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c->data.sprite.data = area;
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/* check for bad data */
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if ((int)c->source_size + 4 != area->used) {
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msg_data.error = messages_get("BadSprite");
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content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
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return false;
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}
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error = xosspriteop_read_sprite_info(osspriteop_PTR,
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(osspriteop_area *)0x100,
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(osspriteop_id) ((char *) area + area->first),
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&w, &h, NULL, NULL);
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if (error) {
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LOG(("xosspriteop_read_sprite_info: 0x%x: %s",
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error->errnum, error->errmess));
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msg_data.error = error->errmess;
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content_broadcast(c, CONTENT_MSG_ERROR, msg_data);
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return false;
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}
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c->width = w;
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c->height = h;
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c->title = malloc(100);
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if (c->title)
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snprintf(c->title, 100, messages_get("SpriteTitle"), c->width,
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c->height, c->source_size);
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c->status = CONTENT_STATUS_DONE;
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return true;
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}
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/**
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* Destroy a CONTENT_SPRITE and free all resources it owns.
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*/
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void sprite_destroy(struct content *c)
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{
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/* do not free c->data.sprite.data at it is simply a pointer to
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* 4 bytes beforec->source_data. */
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free(c->title);
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}
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/**
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* Redraw a CONTENT_SPRITE.
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*/
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bool sprite_redraw(struct content *c, int x, int y,
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int width, int height,
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int clip_x0, int clip_y0, int clip_x1, int clip_y1,
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float scale, colour background_colour)
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{
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if (plot.flush && !plot.flush())
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return false;
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return image_redraw(c->data.sprite.data,
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ro_plot_origin_x + x * 2,
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ro_plot_origin_y - y * 2,
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width, height,
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c->width,
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c->height,
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background_colour,
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false, false, false,
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IMAGE_PLOT_OS);
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}
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#endif
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/**
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* Returns the bit depth of a sprite
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*
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* \param s sprite
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* \return depth in bpp
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*/
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byte sprite_bpp(const osspriteop_header *s)
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{
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/* bit 31 indicates the presence of a full alpha channel rather than a binary mask */
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int type = ((unsigned)s->mode >> osspriteop_TYPE_SHIFT) & 15;
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byte bpp = 0;
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switch (type) {
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case osspriteop_TYPE_OLD:
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{
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bits psr;
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int val;
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if (!xos_read_mode_variable(s->mode, os_MODEVAR_LOG2_BPP, &val, &psr) &&
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!(psr & _C)) bpp = 1 << val;
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}
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break;
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case osspriteop_TYPE1BPP: bpp = 1; break;
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case osspriteop_TYPE2BPP: bpp = 2; break;
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case osspriteop_TYPE4BPP: bpp = 4; break;
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case osspriteop_TYPE8BPP: bpp = 8; break;
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case osspriteop_TYPE16BPP: bpp = 16; break;
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case osspriteop_TYPE32BPP: bpp = 32; break;
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case osspriteop_TYPE_CMYK: bpp = 32; break;
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}
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return bpp;
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}
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