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Diffstat (limited to 'riscos/thumbnail.c')
-rw-r--r-- | riscos/thumbnail.c | 363 |
1 files changed, 0 insertions, 363 deletions
diff --git a/riscos/thumbnail.c b/riscos/thumbnail.c deleted file mode 100644 index ee21747f5..000000000 --- a/riscos/thumbnail.c +++ /dev/null @@ -1,363 +0,0 @@ -/* - * Copyright 2004 James Bursa <bursa@users.sourceforge.net> - * Copyright 2005 Richard Wilson <info@tinct.net> - * - * This file is part of NetSurf, http://www.netsurf-browser.org/ - * - * NetSurf is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; version 2 of the License. - * - * NetSurf is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -/** \file - * Page thumbnail creation (implementation). - * - * Thumbnails are created by redirecting output to a sprite and rendering the - * page at a small scale. - */ - -#include <assert.h> -#include <string.h> -#include <swis.h> -#include "rufl.h" -#include "oslib/colourtrans.h" -#include "oslib/osfile.h" -#include "oslib/osspriteop.h" - -#include "utils/nsoption.h" -#include "utils/log.h" -#include "content/content.h" -#include "content/hlcache.h" -#include "desktop/plotters.h" -#include "desktop/thumbnail.h" -#include "image/bitmap.h" - -#include "riscos/bitmap.h" -#include "riscos/gui.h" -#include "riscos/oslib_pre7.h" -#include "riscos/thumbnail.h" -#include "riscos/tinct.h" - -/* Whether we can use 32bpp sprites -*/ -static int thumbnail_32bpp_available = -1; - - -/* Sprite output context saving -*/ -struct thumbnail_save_area { - osspriteop_save_area *save_area; - int context1; - int context2; - int context3; -}; - - -/* Internal prototypes -*/ -static osspriteop_area *thumbnail_create_8bpp(struct bitmap *bitmap); -static void thumbnail_test(void); -static struct thumbnail_save_area* thumbnail_switch_output( - osspriteop_area *sprite_area, - osspriteop_header *sprite_header); -static void thumbnail_restore_output(struct thumbnail_save_area *save_area); - - -/** - * Create a thumbnail of a page. - * - * \param content content structure to thumbnail - * \param bitmap the bitmap to draw to - * \return true on success and bitmap updated else false - */ -bool thumbnail_create(hlcache_handle *content, struct bitmap *bitmap) -{ - struct thumbnail_save_area *save_area; - osspriteop_area *sprite_area = NULL; - osspriteop_header *sprite_header = NULL; - struct redraw_context ctx = { - .interactive = false, - .background_images = true, - .plot = &ro_plotters - }; - - assert(content); - assert(bitmap); - - LOG(("content %p in bitmap %p", content, bitmap)); - - /* check if we have access to 32bpp sprites natively */ - if (thumbnail_32bpp_available == -1) { - thumbnail_test(); - } - - /* if we don't support 32bpp sprites then we redirect to an 8bpp - * image and then convert back. - */ - if (thumbnail_32bpp_available != 1) { - sprite_area = thumbnail_create_8bpp(bitmap); - if (!sprite_area) - return false; - sprite_header = (osspriteop_header *)(sprite_area + 1); - } else { - const uint8_t *pixbufp = riscos_bitmap_get_buffer(bitmap); - if (!pixbufp || !bitmap->sprite_area) - return false; - sprite_area = bitmap->sprite_area; - sprite_header = (osspriteop_header *)(sprite_area + 1); - } - - /* set up the plotters */ - ro_plot_origin_x = 0; - ro_plot_origin_y = bitmap->height * 2; - - /* switch output and redraw */ - save_area = thumbnail_switch_output(sprite_area, sprite_header); - if (!save_area) { - if (thumbnail_32bpp_available != 1) - free(sprite_area); - return false; - } - rufl_invalidate_cache(); - colourtrans_set_gcol(os_COLOUR_WHITE, colourtrans_SET_BG_GCOL, - os_ACTION_OVERWRITE, 0); - - thumbnail_redraw(content, bitmap->width, bitmap->height, &ctx); - - thumbnail_restore_output(save_area); - rufl_invalidate_cache(); - - /* if we changed to 8bpp then go back to 32bpp */ - if (thumbnail_32bpp_available != 1) { - const uint8_t *pixbufp = riscos_bitmap_get_buffer(bitmap); - _kernel_oserror *error; - - if (!pixbufp || !bitmap->sprite_area) { - free(sprite_area); - return false; - } - error = _swix(Tinct_ConvertSprite, _INR(2,3), - sprite_header, - (osspriteop_header *)(bitmap->sprite_area + 1)); - free(sprite_area); - if (error) - return false; - } - - riscos_bitmap_modified(bitmap); - return true; -} - - -/** - * Convert a bitmap to 8bpp. - * - * \param bitmap the bitmap to convert - * \return a sprite area containing an 8bpp sprite - */ -osspriteop_area *thumbnail_convert_8bpp(struct bitmap *bitmap) -{ - struct thumbnail_save_area *save_area; - osspriteop_area *sprite_area = NULL; - osspriteop_header *sprite_header = NULL; - - sprite_area = thumbnail_create_8bpp(bitmap); - if (!sprite_area) - return NULL; - sprite_header = (osspriteop_header *)(sprite_area + 1); - - - /* switch output and redraw */ - save_area = thumbnail_switch_output(sprite_area, sprite_header); - if (save_area == NULL) { - if (thumbnail_32bpp_available != 1) - free(sprite_area); - return false; - } - _swix(Tinct_Plot, _IN(2) | _IN(3) | _IN(4) | _IN(7), - (osspriteop_header *)(bitmap->sprite_area + 1), - 0, 0, - tinct_ERROR_DIFFUSE); - thumbnail_restore_output(save_area); - - if (sprite_header->image != sprite_header->mask) { - /* build the sprite mask from the alpha channel */ - void *buf = riscos_bitmap_get_buffer(bitmap); - unsigned *dp = (unsigned *) buf; - if (!dp) - return sprite_area; - int w = riscos_bitmap_get_width(bitmap); - int h = riscos_bitmap_get_height(bitmap); - int dp_offset = riscos_bitmap_get_rowstride(bitmap) / 4 - w; - int mp_offset = ((sprite_header->width + 1) * 4) - w; - byte *mp = (byte*)sprite_header + sprite_header->mask; - bool alpha = ((unsigned)sprite_header->mode & 0x80000000U) != 0; - - while (h-- > 0) { - int x = 0; - for(x = 0; x < w; x++) { - unsigned d = *dp++; - if (alpha) - *mp++ = (d >> 24) ^ 0xff; - else - *mp++ = (d < 0xff000000U) ? 0 : 0xff; - } - dp += dp_offset; - mp += mp_offset; - } - } - - return sprite_area; -} - - -/** - * Creates an 8bpp canvas. - * - * \param bitmap the bitmap to clone the size of - * \return a sprite area containing an 8bpp sprite - */ -osspriteop_area *thumbnail_create_8bpp(struct bitmap *bitmap) -{ - unsigned image_size = ((bitmap->width + 3) & ~3) * bitmap->height; - bool opaque = riscos_bitmap_get_opaque(bitmap); - osspriteop_header *sprite_header = NULL; - osspriteop_area *sprite_area = NULL; - unsigned area_size; - - /* clone the sprite */ - area_size = sizeof(osspriteop_area) + - sizeof(osspriteop_header) + - image_size + - 2048; - - if (!opaque) area_size += image_size; - - sprite_area = (osspriteop_area *)malloc(area_size); - if (!sprite_area) { - LOG(("no memory for malloc()")); - return NULL; - } - sprite_area->size = area_size; - sprite_area->sprite_count = 1; - sprite_area->first = 16; - sprite_area->used = area_size; - sprite_header = (osspriteop_header *)(sprite_area + 1); - sprite_header->size = area_size - sizeof(osspriteop_area); - memset(sprite_header->name, 0x00, 12); - strcpy(sprite_header->name, "bitmap"); - sprite_header->left_bit = 0; - sprite_header->height = bitmap->height - 1; - sprite_header->mode = os_MODE8BPP90X90; - sprite_header->right_bit = ((bitmap->width << 3) - 1) & 31; - sprite_header->width = ((bitmap->width + 3) >> 2) - 1; - sprite_header->image = sizeof(osspriteop_header) + 2048; - sprite_header->mask = sizeof(osspriteop_header) + 2048; - if (!opaque) sprite_header->mask += image_size; - - /* create the palette. we don't read the necessary size like - * we really should as we know it's going to have 256 entries - * of 8 bytes = 2048. */ - xcolourtrans_read_palette((osspriteop_area *)os_MODE8BPP90X90, - (osspriteop_id)0, - (os_palette *)(sprite_header + 1), 2048, - (colourtrans_palette_flags)(1 << 1), 0); - return sprite_area; -} - - -/** - * Check to see whether 32bpp sprites are available. - * - * Rather than using Wimp_ReadSysInfo we test if 32bpp sprites are available - * in case the user has a 3rd party patch to enable them. - */ -static void thumbnail_test(void) -{ - unsigned int area_size; - osspriteop_area *sprite_area; - - /* try to create a 1x1 32bpp sprite */ - area_size = sizeof(osspriteop_area) + - sizeof(osspriteop_header) + sizeof(int); - if ((sprite_area = (osspriteop_area *)malloc(area_size)) == NULL) { - LOG(("Insufficient memory to perform sprite test.")); - return; - } - sprite_area->size = area_size + 1; - sprite_area->sprite_count = 0; - sprite_area->first = 16; - sprite_area->used = 16; - if (xosspriteop_create_sprite(osspriteop_NAME, sprite_area, - "test", false, 1, 1, (os_mode)tinct_SPRITE_MODE)) - thumbnail_32bpp_available = 0; - else - thumbnail_32bpp_available = 1; - free(sprite_area); -} - - -/** - * Switches output to the specified sprite and returns the previous context. - */ -static struct thumbnail_save_area* thumbnail_switch_output( - osspriteop_area *sprite_area, - osspriteop_header *sprite_header) -{ - struct thumbnail_save_area *save_area; - int size; - - /* create a save area */ - save_area = calloc(sizeof(struct thumbnail_save_area), 1); - if (save_area == NULL) return NULL; - - /* allocate OS_SpriteOp save area */ - if (xosspriteop_read_save_area_size(osspriteop_PTR, sprite_area, - (osspriteop_id)sprite_header, &size)) { - free(save_area); - return NULL; - } - - /* create the save area */ - save_area->save_area = malloc((unsigned)size); - if (save_area->save_area == NULL) { - free(save_area); - return NULL; - } - save_area->save_area->a[0] = 0; - - /* switch output to sprite */ - if (xosspriteop_switch_output_to_sprite(osspriteop_PTR, sprite_area, - (osspriteop_id)sprite_header, save_area->save_area, - 0, &save_area->context1, &save_area->context2, - &save_area->context3)) { - free(save_area->save_area); - free(save_area); - return NULL; - } - return save_area; -} - - -/** - * Restores output to the specified context, and destroys it. - */ -static void thumbnail_restore_output(struct thumbnail_save_area *save_area) -{ - /* we don't care if we err, as there's nothing we can do about it */ - xosspriteop_switch_output_to_sprite(osspriteop_PTR, - (osspriteop_area *)save_area->context1, - (osspriteop_id)save_area->context2, - (osspriteop_save_area *)save_area->context3, - 0, 0, 0, 0); - free(save_area->save_area); - free(save_area); -} |