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netsurf/frontends/riscos/bitmap.c
Vincent Sanders 75018632a9 Use coccinelle to change logging macro calls in c files 
for F in $(git ls-files '*.c');do spatch --sp-file foo.cocci --in-place ${F};done

@@ expression E; @@
-LOG(E);
+NSLOG(netsurf, INFO, E);
@@ expression E, E1; @@
-LOG(E, E1);
+NSLOG(netsurf, INFO, E, E1);
@@ expression E, E1, E2; @@
-LOG(E, E1, E2);
+NSLOG(netsurf, INFO, E, E1, E2);
@@ expression E, E1, E2, E3; @@
-LOG(E, E1, E2, E3);
+NSLOG(netsurf, INFO, E, E1, E2, E3);
@@ expression E, E1, E2, E3, E4; @@
-LOG(E, E1, E2, E3, E4);
+NSLOG(netsurf, INFO, E, E1, E2, E3, E4);
@@ expression E, E1, E2, E3, E4, E5; @@
-LOG(E, E1, E2, E3, E4, E5);
+NSLOG(netsurf, INFO, E, E1, E2, E3, E4, E5);
@@ expression E, E1, E2, E3, E4, E5, E6; @@
-LOG(E, E1, E2, E3, E4, E5, E6);
+NSLOG(netsurf, INFO, E, E1, E2, E3, E4, E5, E6);
@@ expression E, E1, E2, E3, E4, E5, E6, E7; @@
-LOG(E, E1, E2, E3, E4, E5, E6, E7);
+NSLOG(netsurf, INFO, E, E1, E2, E3, E4, E5, E6, E7);
2017-09-06 18:45:27 +01:00

889 lines
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/*
* Copyright 2004 James Bursa <bursa@users.sourceforge.net>
* Copyright 2005 Richard Wilson <info@tinct.net>
* Copyright 2008 Adrian Lees <adrianl@users.sourceforge.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
* RISC OS implementation of bitmap operations.
*
* This implements the interface given by image/bitmap.h using RISC OS
* sprites.
*/
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include <swis.h>
#include <rufl.h>
#include <unixlib/local.h>
#include <oslib/colourtrans.h>
#include <oslib/osfile.h>
#include <oslib/osfind.h>
#include <oslib/osgbpb.h>
#include <oslib/osspriteop.h>
#include <oslib/wimp.h>
#include "utils/nsoption.h"
#include "utils/filename.h"
#include "utils/log.h"
#include "utils/messages.h"
#include "netsurf/plotters.h"
#include "netsurf/bitmap.h"
#include "netsurf/content.h"
#include "riscos/gui.h"
#include "riscos/image.h"
#include "riscos/palettes.h"
#include "riscos/content-handlers/sprite.h"
#include "riscos/tinct.h"
#include "riscos/bitmap.h"
/** Colour in the overlay sprite that allows the bitmap to show through */
#define OVERLAY_INDEX 0xfe
/** Size of buffer used when constructing mask data to be saved */
#define SAVE_CHUNK_SIZE 4096
/**
* 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;
};
/**
* Initialise a bitmaps sprite area.
*
* \param bitmap the bitmap to initialise
* \return true if bitmap initialised else false.
*/
static bool bitmap_initialise(struct bitmap *bitmap)
{
unsigned int area_size;
osspriteop_area *sprite_area;
osspriteop_header *sprite;
assert(!bitmap->sprite_area);
area_size = 16 + 44 + bitmap->width * bitmap->height * 4;
if (bitmap->state & BITMAP_CLEAR_MEMORY)
bitmap->sprite_area = calloc(1, area_size);
else
bitmap->sprite_area = malloc(area_size);
if (!bitmap->sprite_area)
return false;
/* area control block */
sprite_area = bitmap->sprite_area;
sprite_area->size = area_size;
sprite_area->sprite_count = 1;
sprite_area->first = 16;
sprite_area->used = area_size;
/* sprite control block */
sprite = (osspriteop_header *) (sprite_area + 1);
sprite->size = area_size - 16;
memset(sprite->name, 0x00, 12);
strncpy(sprite->name, "bitmap", 12);
sprite->width = bitmap->width - 1;
sprite->height = bitmap->height - 1;
sprite->left_bit = 0;
sprite->right_bit = 31;
sprite->image = sprite->mask = 44;
sprite->mode = tinct_SPRITE_MODE;
return true;
}
/* exported interface documented in riscos/bitmap.h */
void *riscos_bitmap_create(int width, int height, unsigned int state)
{
struct bitmap *bitmap;
if (width == 0 || height == 0)
return NULL;
bitmap = calloc(1, sizeof(struct bitmap));
if (!bitmap)
return NULL;
bitmap->width = width;
bitmap->height = height;
bitmap->state = state;
return bitmap;
}
/* exported interface documented in riscos/bitmap.h */
unsigned char *riscos_bitmap_get_buffer(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *) vbitmap;
assert(bitmap);
/* dynamically create the buffer */
if (bitmap->sprite_area == NULL) {
if (!bitmap_initialise(bitmap))
return NULL;
}
/* image data area should exist */
if (bitmap->sprite_area)
return ((unsigned char *) (bitmap->sprite_area)) + 16 + 44;
return NULL;
}
/**
* Sets whether a bitmap should be plotted opaque
*
* \param vbitmap a bitmap, as returned by bitmap_create()
* \param opaque whether the bitmap should be plotted opaque
*/
static void bitmap_set_opaque(void *vbitmap, bool opaque)
{
struct bitmap *bitmap = (struct bitmap *) vbitmap;
assert(bitmap);
if (opaque)
bitmap->state |= BITMAP_OPAQUE;
else
bitmap->state &= ~BITMAP_OPAQUE;
}
/**
* Find the width of a pixel row in bytes.
*
* \param vbitmap A bitmap, as returned by riscos_bitmap_create()
* \return width of a pixel row in the bitmap
*/
static size_t bitmap_get_rowstride(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *) vbitmap;
return bitmap->width * 4;
}
/**
* Tests whether a bitmap has an opaque alpha channel
*
* \param vbitmap a bitmap, as returned by bitmap_create()
* \return whether the bitmap is opaque
*/
static bool bitmap_test_opaque(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *) vbitmap;
unsigned char *sprite;
unsigned int width, height, size;
osspriteop_header *sprite_header;
unsigned *p, *ep;
assert(bitmap);
sprite = riscos_bitmap_get_buffer(bitmap);
if (!sprite)
return false;
width = bitmap_get_rowstride(bitmap);
sprite_header = (osspriteop_header *) (bitmap->sprite_area + 1);
height = (sprite_header->height + 1);
size = width * height;
p = (void *) sprite;
ep = (void *) (sprite + (size & ~31));
while (p < ep) {
/* \todo prefetch(p, 128)? */
if (((p[0] & p[1] & p[2] & p[3] & p[4] & p[5] & p[6] & p[7])
& 0xff000000U) != 0xff000000U)
return false;
p += 8;
}
ep = (void *) (sprite + size);
while (p < ep) {
if ((*p & 0xff000000U) != 0xff000000U) return false;
p++;
}
return true;
}
/* exported interface documented in riscos/bitmap.h */
bool riscos_bitmap_get_opaque(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *) vbitmap;
assert(bitmap);
return (bitmap->state & BITMAP_OPAQUE);
}
/* exported interface documented in riscos/bitmap.h */
void riscos_bitmap_destroy(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *) vbitmap;
assert(bitmap);
/* destroy bitmap */
if (bitmap->sprite_area) {
free(bitmap->sprite_area);
}
free(bitmap);
}
/* exported interface documented in riscos/bitmap.h */
bool riscos_bitmap_save(void *vbitmap, const char *path, unsigned flags)
{
struct bitmap *bitmap = (struct bitmap *) vbitmap;
os_error *error;
if (bitmap == NULL) {
ro_warn_user("SaveError", messages_get("SprIsNull"));
return false;
}
if (!bitmap->sprite_area) {
riscos_bitmap_get_buffer(bitmap);
}
if (!bitmap->sprite_area)
return false;
if (riscos_bitmap_get_opaque(bitmap)) {
error = xosspriteop_save_sprite_file(osspriteop_USER_AREA,
(bitmap->sprite_area), path);
if (error) {
NSLOG(netsurf, INFO,
"xosspriteop_save_sprite_file: 0x%x: %s",
error->errnum,
error->errmess);
ro_warn_user("SaveError", error->errmess);
return false;
}
return true;
} else {
/* to make the saved sprite useful we must convert from 'Tinct'
* format to either a bi-level mask or a Select-style full
* alpha channel */
osspriteop_area *area = bitmap->sprite_area;
osspriteop_header *hdr = (void *) ((char *) area + area->first);
unsigned width = hdr->width + 1, height = hdr->height + 1;
unsigned image_size = height * width * 4;
unsigned char *chunk_buf;
unsigned *p, *elp, *eip;
unsigned mask_size;
size_t chunk_pix;
struct {
osspriteop_area area;
osspriteop_header hdr;
} file_hdr;
os_fw fw;
/* we only support 32bpp sprites */
if ((((unsigned)hdr->mode >> 27)&15) != 6) {
assert(!"Unsupported sprite format in bitmap_save");
return false;
}
chunk_buf = malloc(SAVE_CHUNK_SIZE);
if (!chunk_buf) {
ro_warn_user("NoMemory", NULL);
return false;
}
file_hdr.area = *area;
file_hdr.hdr = *hdr;
if (flags & BITMAP_SAVE_FULL_ALPHA) {
mask_size = ((width + 3) & ~3) * height;
chunk_pix = SAVE_CHUNK_SIZE;
file_hdr.hdr.mode = (os_mode)((unsigned)file_hdr.hdr.mode
| (1U<<31));
} else {
mask_size = (((width + 31) & ~31)/8) * height;
chunk_pix = SAVE_CHUNK_SIZE<<3;
file_hdr.hdr.mode = (os_mode)((unsigned)file_hdr.hdr.mode
& ~(1U<<31));
}
file_hdr.area.sprite_count = 1;
file_hdr.area.first = sizeof(file_hdr.area);
file_hdr.area.used = sizeof(file_hdr) + image_size + mask_size;
file_hdr.hdr.image = sizeof(file_hdr.hdr);
file_hdr.hdr.mask = file_hdr.hdr.image + image_size;
file_hdr.hdr.size = file_hdr.hdr.mask + mask_size;
error = xosfind_openoutw(0, path, NULL, &fw);
if (error) {
NSLOG(netsurf, INFO, "xosfind_openoutw: 0x%x: %s",
error->errnum, error->errmess);
free(chunk_buf);
ro_warn_user("SaveError", error->errmess);
return false;
}
p = (void *) ((char *) hdr + hdr->image);
/* write out the area header, sprite header and image data */
error = xosgbpb_writew(fw, (byte*)&file_hdr + 4,
sizeof(file_hdr)-4, NULL);
if (!error)
error = xosgbpb_writew(fw, (byte*)p, image_size, NULL);
if (error) {
NSLOG(netsurf, INFO, "xosgbpb_writew: 0x%x: %s",
error->errnum, error->errmess);
free(chunk_buf);
xosfind_closew(fw);
ro_warn_user("SaveError", error->errmess);
return false;
}
/* then write out the mask data in chunks */
eip = p + (width * height); /* end of image */
elp = p + width; /* end of line */
while (p < eip) {
unsigned char *dp = chunk_buf;
unsigned *ep = p + chunk_pix;
if (ep > elp) ep = elp;
if (flags & BITMAP_SAVE_FULL_ALPHA) {
while (p < ep) {
*dp++ = ((unsigned char*)p)[3];
p++;
}
}
else {
unsigned char mb = 0;
int msh = 0;
while (p < ep) {
if (((unsigned char*)p)[3]) mb |= (1 << msh);
if (++msh >= 8) {
*dp++ = mb;
msh = 0;
mb = 0;
}
p++;
}
if (msh > 0) *dp++ = mb;
}
if (p >= elp) { /* end of line yet? */
/* align to word boundary */
while ((int)dp & 3) *dp++ = 0;
/* advance end of line pointer */
elp += width;
}
error = xosgbpb_writew(fw, (byte*)chunk_buf, dp-chunk_buf, NULL);
if (error) {
NSLOG(netsurf, INFO,
"xosgbpb_writew: 0x%x: %s",
error->errnum,
error->errmess);
free(chunk_buf);
xosfind_closew(fw);
ro_warn_user("SaveError", error->errmess);
return false;
}
}
error = xosfind_closew(fw);
if (error) {
NSLOG(netsurf, INFO, "xosfind_closew: 0x%x: %s",
error->errnum, error->errmess);
ro_warn_user("SaveError", error->errmess);
}
error = xosfile_set_type(path, osfile_TYPE_SPRITE);
if (error) {
NSLOG(netsurf, INFO, "xosfile_set_type: 0x%x: %s",
error->errnum, error->errmess);
ro_warn_user("SaveError", error->errmess);
}
free(chunk_buf);
return true;
}
}
/**
* The bitmap image has changed, so flush any persistent cache.
*
* \param vbitmap a bitmap, as returned by bitmap_create()
*/
static void bitmap_modified(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *) vbitmap;
bitmap->state |= BITMAP_MODIFIED;
}
/**
* Get the width of a bitmap.
*
* \param vbitmap A bitmap, as returned by bitmap_create()
* \return The bitmaps width in pixels.
*/
static int bitmap_get_width(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *) vbitmap;
return bitmap->width;
}
/**
* Get the height of a bitmap.
*
* \param vbitmap A bitmap, as returned by bitmap_create()
* \return The bitmaps height in pixels.
*/
static int bitmap_get_height(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *) vbitmap;
return bitmap->height;
}
/**
* Find the bytes per pixel of a bitmap
*
* \param vbitmap a bitmap, as returned by bitmap_create()
* \return bytes per pixel
*/
static size_t bitmap_get_bpp(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
return 4;
}
/* exported interface documented in riscos/bitmap.h */
void riscos_bitmap_overlay_sprite(struct bitmap *bitmap,
const osspriteop_header *s)
{
const os_colour *palette;
const byte *sp, *mp;
bool masked = false;
bool alpha = false;
os_error *error;
int dp_offset;
int sp_offset;
unsigned *dp;
int x, y;
int w, h;
assert(sprite_bpp(s) == 8);
if ((unsigned)s->mode & 0x80000000U)
alpha = true;
error = xosspriteop_read_sprite_info(osspriteop_PTR,
(osspriteop_area *)0x100,
(osspriteop_id)s,
&w, &h, NULL, NULL);
if (error) {
NSLOG(netsurf, INFO, "xosspriteop_read_sprite_info: 0x%x:%s",
error->errnum, error->errmess);
return;
}
sp_offset = ((s->width + 1) * 4) - w;
if (w > bitmap->width)
w = bitmap->width;
if (h > bitmap->height)
h = bitmap->height;
dp_offset = bitmap_get_rowstride(bitmap) / 4;
dp = (void*)riscos_bitmap_get_buffer(bitmap);
if (!dp)
return;
sp = (byte*)s + s->image;
mp = (byte*)s + s->mask;
sp += s->left_bit / 8;
mp += s->left_bit / 8;
if (s->image > (int)sizeof(*s))
palette = (os_colour*)(s + 1);
else
palette = default_palette8;
if (s->mask != s->image) {
masked = true;
bitmap_set_opaque(bitmap, false);
}
/* (partially-)transparent pixels in the overlayed sprite retain
* their transparency in the output bitmap; opaque sprite pixels
* are also propagated to the bitmap, except those which are the
* OVERLAY_INDEX colour which allow the original bitmap contents to
* show through */
for (y = 0; y < h; y++) {
unsigned *sdp = dp;
for(x = 0; x < w; x++) {
os_colour d = ((unsigned)palette[(*sp) << 1]) >> 8;
if (*sp++ == OVERLAY_INDEX)
d = *dp;
if (masked) {
if (alpha)
d |= ((*mp << 24) ^ 0xff000000U);
else if (*mp)
d |= 0xff000000U;
}
*dp++ = d;
mp++;
}
dp = sdp + dp_offset;
sp += sp_offset;
mp += sp_offset;
}
}
/**
* Creates an 8bpp canvas.
*
* \param bitmap the bitmap to clone the size of
* \return a sprite area containing an 8bpp sprite
*/
static 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) {
NSLOG(netsurf, INFO, "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;
}
/**
* 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);
}
/**
* Convert a bitmap to 8bpp.
*
* \param bitmap the bitmap to convert
* \return a sprite area containing an 8bpp sprite
*/
osspriteop_area *riscos_bitmap_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 = bitmap_get_width(bitmap);
int h = bitmap_get_height(bitmap);
int dp_offset = 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;
}
/**
* 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) {
NSLOG(netsurf, INFO,
"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);
}
/* exported interface documented in riscos/bitmap.h */
nserror riscos_bitmap_render(struct bitmap *bitmap,
struct hlcache_handle *content)
{
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);
NSLOG(netsurf, INFO, "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);
/* render the content */
content_scaled_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;
}
bitmap_modified(bitmap);
return NSERROR_OK;
}
static struct gui_bitmap_table bitmap_table = {
.create = riscos_bitmap_create,
.destroy = riscos_bitmap_destroy,
.set_opaque = bitmap_set_opaque,
.get_opaque = riscos_bitmap_get_opaque,
.test_opaque = bitmap_test_opaque,
.get_buffer = riscos_bitmap_get_buffer,
.get_rowstride = bitmap_get_rowstride,
.get_width = bitmap_get_width,
.get_height = bitmap_get_height,
.get_bpp = bitmap_get_bpp,
.save = riscos_bitmap_save,
.modified = bitmap_modified,
.render = riscos_bitmap_render,
};
struct gui_bitmap_table *riscos_bitmap_table = &bitmap_table;
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