summaryrefslogtreecommitdiff
path: root/riscos/thumbnail.c
diff options
context:
space:
mode:
Diffstat (limited to 'riscos/thumbnail.c')
-rw-r--r--riscos/thumbnail.c363
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);
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-01 12:07:41 +0000