mirrors
/
netsurf
mirror of https://github.com/netsurf-browser/netsurf
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Convert beos to bitmap render API

This commit is contained in:
Vincent Sanders 2015-04-24 13:52:39 +01:00
parent 818b8276df
commit 217aa3adc1
3 changed files with 299 additions and 330 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
beos/Makefile.target
View File

@ -95,8 +95,7 @@ endif
# S_BEOS are sources purely for the BeOS build
S_BEOS := about.cpp bitmap.cpp download.cpp fetch_rsrc.cpp filetype.cpp \
font.cpp gui.cpp login.cpp gui_options.cpp plotters.cpp \
scaffolding.cpp search.cpp schedule.cpp thumbnail.cpp \
throbber.cpp window.cpp
scaffolding.cpp search.cpp schedule.cpp throbber.cpp window.cpp
S_BEOS := $(addprefix beos/,$(S_BEOS))
RDEF_BEOS := res.rdef

463
beos/bitmap.cpp
View File

@ -16,15 +16,16 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Generic bitmap handling (BeOS implementation).
/**
* \file
* BeOS implementation of generic bitmaps.
*
* This implements the interface given by desktop/bitmap.h using BBitmap.
* This implements the interface given by image/bitmap.h using BBitmap.
*/
#define __STDBOOL_H__ 1
//#include <stdbool.h>
#include <assert.h>
#include <sys/param.h>
#include <string.h>
#include <Bitmap.h>
#include <BitmapStream.h>
@ -32,22 +33,31 @@
#include <GraphicsDefs.h>
#include <TranslatorFormats.h>
#include <TranslatorRoster.h>
#include <View.h>
extern "C" {
#include "content/content.h"
#include "image/bitmap.h"
#include "utils/log.h"
#include "content/content.h"
#include "content/urldb.h"
#include "desktop/plotters.h"
#include "desktop/browser.h"
#include "desktop/font.h"
#include "image/bitmap.h"
}
#include "beos/bitmap.h"
#include "beos/gui.h"
#include "beos/scaffolding.h"
#include "beos/plotters.h"
struct bitmap {
BBitmap *primary;
BBitmap *shadow; // in NetSurf's ABGR order
BBitmap *pretile_x;
BBitmap *pretile_y;
BBitmap *pretile_xy;
bool opaque;
BBitmap *primary;
BBitmap *shadow; // in NetSurf's ABGR order
BBitmap *pretile_x;
BBitmap *pretile_y;
BBitmap *pretile_xy;
bool opaque;
};
#define MIN_PRETILE_WIDTH 256
@ -64,7 +74,7 @@ struct bitmap {
*
* \param src Source 32-bit pixels arranged in ABGR order.
* \param dst Output data in BGRA order.
* \param width Width of the bitmap
* \param width Width of the bitmap
* \param height Height of the bitmap
* \param rowstride Number of bytes to skip after each row (this implementation
* requires this to be a multiple of 4.)
@ -75,28 +85,28 @@ static inline void nsbeos_rgba_to_bgra(void *src,
int height,
size_t rowstride)
{
struct abgr { uint8 a, b, g, r; };
struct rgba { uint8 r, g, b ,a; };
struct bgra { uint8 b, g, r, a; };
struct rgba *from = (struct rgba *)src;
struct bgra *to = (struct bgra *)dst;
struct abgr { uint8 a, b, g, r; };
struct rgba { uint8 r, g, b ,a; };
struct bgra { uint8 b, g, r, a; };
struct rgba *from = (struct rgba *)src;
struct bgra *to = (struct bgra *)dst;
rowstride >>= 2;
rowstride >>= 2;
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
to[x].b = from[x].b;
to[x].g = from[x].g;
to[x].r = from[x].r;
to[x].a = from[x].a;
/*
if (from[x].a == 0)
*(rgb_color *)&to[x] = B_TRANSPARENT_32_BIT;
*/
}
from += rowstride;
to += rowstride;
}
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
to[x].b = from[x].b;
to[x].g = from[x].g;
to[x].r = from[x].r;
to[x].a = from[x].a;
/*
if (from[x].a == 0)
*(rgb_color *)&to[x] = B_TRANSPARENT_32_BIT;
*/
}
from += rowstride;
to += rowstride;
}
}
@ -108,27 +118,26 @@ static inline void nsbeos_rgba_to_bgra(void *src,
* \param state a flag word indicating the initial state
* \return an opaque struct bitmap, or NULL on memory exhaustion
*/
void *bitmap_create(int width, int height, unsigned int state)
{
struct bitmap *bmp = (struct bitmap *)malloc(sizeof(struct bitmap));
if (bmp == NULL)
return NULL;
struct bitmap *bmp = (struct bitmap *)malloc(sizeof(struct bitmap));
if (bmp == NULL)
return NULL;
int32 flags = 0;
if (state & BITMAP_CLEAR_MEMORY)
flags |= B_BITMAP_CLEAR_TO_WHITE;
int32 flags = 0;
if (state & BITMAP_CLEAR_MEMORY)
flags |= B_BITMAP_CLEAR_TO_WHITE;
BRect frame(0, 0, width - 1, height - 1);
//XXX: bytes per row ?
bmp->primary = new BBitmap(frame, flags, B_RGBA32);
bmp->shadow = new BBitmap(frame, flags, B_RGBA32);
BRect frame(0, 0, width - 1, height - 1);
//XXX: bytes per row ?
bmp->primary = new BBitmap(frame, flags, B_RGBA32);
bmp->shadow = new BBitmap(frame, flags, B_RGBA32);
bmp->pretile_x = bmp->pretile_y = bmp->pretile_xy = NULL;
bmp->pretile_x = bmp->pretile_y = bmp->pretile_xy = NULL;
bmp->opaque = (state & BITMAP_OPAQUE) != 0;
bmp->opaque = (state & BITMAP_OPAQUE) != 0;
return bmp;
return bmp;
}
@ -140,9 +149,9 @@ void *bitmap_create(int width, int height, unsigned int state)
*/
void bitmap_set_opaque(void *vbitmap, bool opaque)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
bitmap->opaque = opaque;
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
bitmap->opaque = opaque;
}
@ -154,10 +163,10 @@ void bitmap_set_opaque(void *vbitmap, bool opaque)
*/
bool bitmap_test_opaque(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
/* todo: test if bitmap is opaque */
return false;
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
/* todo: test if bitmap is opaque */
return false;
}
@ -168,9 +177,9 @@ bool bitmap_test_opaque(void *vbitmap)
*/
bool bitmap_get_opaque(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
return bitmap->opaque;
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
return bitmap->opaque;
}
@ -186,9 +195,9 @@ bool bitmap_get_opaque(void *vbitmap)
unsigned char *bitmap_get_buffer(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
return (unsigned char *)(bitmap->shadow->Bits());
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
return (unsigned char *)(bitmap->shadow->Bits());
}
@ -198,12 +207,11 @@ unsigned char *bitmap_get_buffer(void *vbitmap)
* \param vbitmap a bitmap, as returned by bitmap_create()
* \return width of a pixel row in the bitmap
*/
size_t bitmap_get_rowstride(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
return (bitmap->primary->BytesPerRow());
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
return (bitmap->primary->BytesPerRow());
}
@ -213,39 +221,42 @@ size_t bitmap_get_rowstride(void *vbitmap)
* \param vbitmap a bitmap, as returned by bitmap_create()
* \return bytes per pixels of the bitmap
*/
size_t bitmap_get_bpp(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
return 4;
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
return 4;
}
static void
nsbeos_bitmap_free_pretiles(struct bitmap *bitmap)
/**
* Free pretiles of a bitmap.
*
* \param bitmap The bitmap to free the pretiles of.
*/
static void nsbeos_bitmap_free_pretiles(struct bitmap *bitmap)
{
#define FREE_TILE(XY) if (bitmap->pretile_##XY) delete (bitmap->pretile_##XY); bitmap->pretile_##XY = NULL
FREE_TILE(x);
FREE_TILE(y);
FREE_TILE(xy);
FREE_TILE(x);
FREE_TILE(y);
FREE_TILE(xy);
#undef FREE_TILE
}
/**
* Free a bitmap.
*
* \param vbitmap a bitmap, as returned by bitmap_create()
*/
void bitmap_destroy(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
nsbeos_bitmap_free_pretiles(bitmap);
delete bitmap->primary;
delete bitmap->shadow;
free(bitmap);
struct bitmap *bitmap = (struct bitmap *)vbitmap;
assert(bitmap);
nsbeos_bitmap_free_pretiles(bitmap);
delete bitmap->primary;
delete bitmap->shadow;
free(bitmap);
}
@ -257,22 +268,21 @@ void bitmap_destroy(void *vbitmap)
* \param flags modify the behaviour of the save
* \return true on success, false on error and error reported
*/
bool bitmap_save(void *vbitmap, const char *path, unsigned flags)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
BTranslatorRoster *roster = BTranslatorRoster::Default();
BBitmapStream stream(bitmap->primary);
BFile file(path, B_WRITE_ONLY | B_CREATE_FILE);
uint32 type = B_PNG_FORMAT;
struct bitmap *bitmap = (struct bitmap *)vbitmap;
BTranslatorRoster *roster = BTranslatorRoster::Default();
BBitmapStream stream(bitmap->primary);
BFile file(path, B_WRITE_ONLY | B_CREATE_FILE);
uint32 type = B_PNG_FORMAT;
if (file.InitCheck() < B_OK)
return false;
if (file.InitCheck() < B_OK)
return false;
if (roster->Translate(&stream, NULL, NULL, &file, type) < B_OK)
return false;
if (roster->Translate(&stream, NULL, NULL, &file, type) < B_OK)
return false;
return true;
return true;
}
@ -283,63 +293,67 @@ bool bitmap_save(void *vbitmap, const char *path, unsigned flags)
*/
void bitmap_modified(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
// convert the shadow (ABGR) to into the primary bitmap
nsbeos_rgba_to_bgra(bitmap->shadow->Bits(), bitmap->primary->Bits(),
bitmap->primary->Bounds().Width() + 1,
bitmap->primary->Bounds().Height() + 1,
bitmap->primary->BytesPerRow());
nsbeos_bitmap_free_pretiles(bitmap);
struct bitmap *bitmap = (struct bitmap *)vbitmap;
// convert the shadow (ABGR) to into the primary bitmap
nsbeos_rgba_to_bgra(bitmap->shadow->Bits(), bitmap->primary->Bits(),
bitmap->primary->Bounds().Width() + 1,
bitmap->primary->Bounds().Height() + 1,
bitmap->primary->BytesPerRow());
nsbeos_bitmap_free_pretiles(bitmap);
}
int bitmap_get_width(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
return bitmap->primary->Bounds().Width() + 1;
struct bitmap *bitmap = (struct bitmap *)vbitmap;
return bitmap->primary->Bounds().Width() + 1;
}
int bitmap_get_height(void *vbitmap)
{
struct bitmap *bitmap = (struct bitmap *)vbitmap;
return bitmap->primary->Bounds().Height() + 1;
struct bitmap *bitmap = (struct bitmap *)vbitmap;
return bitmap->primary->Bounds().Height() + 1;
}
static BBitmap *
nsbeos_bitmap_generate_pretile(BBitmap *primary, int repeat_x, int repeat_y)
{
int width = primary->Bounds().Width() + 1;
int height = primary->Bounds().Height() + 1;
size_t primary_stride = primary->BytesPerRow();
BRect frame(0, 0, width * repeat_x - 1, height * repeat_y - 1);
BBitmap *result = new BBitmap(frame, 0, B_RGBA32);
int width = primary->Bounds().Width() + 1;
int height = primary->Bounds().Height() + 1;
size_t primary_stride = primary->BytesPerRow();
BRect frame(0, 0, width * repeat_x - 1, height * repeat_y - 1);
BBitmap *result = new BBitmap(frame, 0, B_RGBA32);
char *target_buffer = (char *)result->Bits();
int x,y,row;
/* This algorithm won't work if the strides are not multiples */
assert((size_t)(result->BytesPerRow()) ==
(primary_stride * repeat_x));
char *target_buffer = (char *)result->Bits();
int x,y,row;
/* This algorithm won't work if the strides are not multiples */
assert((size_t)(result->BytesPerRow()) ==
(primary_stride * repeat_x));
if (repeat_x == 1 && repeat_y == 1) {
delete result;
// just return a copy
return new BBitmap(primary);
}
if (repeat_x == 1 && repeat_y == 1) {
delete result;
// just return a copy
return new BBitmap(primary);
}
for (y = 0; y < repeat_y; ++y) {
char *primary_buffer = (char *)primary->Bits();
for (row = 0; row < height; ++row) {
for (x = 0; x < repeat_x; ++x) {
memcpy(target_buffer,
primary_buffer, primary_stride);
target_buffer += primary_stride;
}
primary_buffer += primary_stride;
}
}
return result;
for (y = 0; y < repeat_y; ++y) {
char *primary_buffer = (char *)primary->Bits();
for (row = 0; row < height; ++row) {
for (x = 0; x < repeat_x; ++x) {
memcpy(target_buffer,
primary_buffer, primary_stride);
target_buffer += primary_stride;
}
primary_buffer += primary_stride;
}
}
return result;
}
/**
* The primary image associated with this bitmap object.
*
@ -348,9 +362,10 @@ nsbeos_bitmap_generate_pretile(BBitmap *primary, int repeat_x, int repeat_y)
BBitmap *
nsbeos_bitmap_get_primary(struct bitmap* bitmap)
{
return bitmap->primary;
return bitmap->primary;
}
/**
* The X-pretiled image associated with this bitmap object.
*
@ -359,16 +374,17 @@ nsbeos_bitmap_get_primary(struct bitmap* bitmap)
BBitmap *
nsbeos_bitmap_get_pretile_x(struct bitmap* bitmap)
{
if (!bitmap->pretile_x) {
int width = bitmap->primary->Bounds().Width() + 1;
int xmult = (MIN_PRETILE_WIDTH + width - 1)/width;
LOG(("Pretiling %p for X*%d", bitmap, xmult));
bitmap->pretile_x = nsbeos_bitmap_generate_pretile(bitmap->primary, xmult, 1);
}
return bitmap->pretile_x;
if (!bitmap->pretile_x) {
int width = bitmap->primary->Bounds().Width() + 1;
int xmult = (MIN_PRETILE_WIDTH + width - 1)/width;
LOG(("Pretiling %p for X*%d", bitmap, xmult));
bitmap->pretile_x = nsbeos_bitmap_generate_pretile(bitmap->primary, xmult, 1);
}
return bitmap->pretile_x;
}
/**
* The Y-pretiled image associated with this bitmap object.
*
@ -377,15 +393,16 @@ nsbeos_bitmap_get_pretile_x(struct bitmap* bitmap)
BBitmap *
nsbeos_bitmap_get_pretile_y(struct bitmap* bitmap)
{
if (!bitmap->pretile_y) {
int height = bitmap->primary->Bounds().Height() + 1;
int ymult = (MIN_PRETILE_HEIGHT + height - 1)/height;
LOG(("Pretiling %p for Y*%d", bitmap, ymult));
bitmap->pretile_y = nsbeos_bitmap_generate_pretile(bitmap->primary, 1, ymult);
}
return bitmap->pretile_y;
if (!bitmap->pretile_y) {
int height = bitmap->primary->Bounds().Height() + 1;
int ymult = (MIN_PRETILE_HEIGHT + height - 1)/height;
LOG(("Pretiling %p for Y*%d", bitmap, ymult));
bitmap->pretile_y = nsbeos_bitmap_generate_pretile(bitmap->primary, 1, ymult);
}
return bitmap->pretile_y;
}
/**
* The XY-pretiled image associated with this bitmap object.
*
@ -394,30 +411,146 @@ nsbeos_bitmap_get_pretile_y(struct bitmap* bitmap)
BBitmap *
nsbeos_bitmap_get_pretile_xy(struct bitmap* bitmap)
{
if (!bitmap->pretile_xy) {
int width = bitmap->primary->Bounds().Width() + 1;
int height = bitmap->primary->Bounds().Height() + 1;
int xmult = (MIN_PRETILE_WIDTH + width - 1)/width;
int ymult = (MIN_PRETILE_HEIGHT + height - 1)/height;
LOG(("Pretiling %p for X*%d Y*%d", bitmap, xmult, ymult));
bitmap->pretile_xy = nsbeos_bitmap_generate_pretile(bitmap->primary, xmult, ymult);
}
return bitmap->pretile_xy;
if (!bitmap->pretile_xy) {
int width = bitmap->primary->Bounds().Width() + 1;
int height = bitmap->primary->Bounds().Height() + 1;
int xmult = (MIN_PRETILE_WIDTH + width - 1)/width;
int ymult = (MIN_PRETILE_HEIGHT + height - 1)/height;
LOG(("Pretiling %p for X*%d Y*%d", bitmap, xmult, ymult));
bitmap->pretile_xy = nsbeos_bitmap_generate_pretile(bitmap->primary, xmult, ymult);
}
return bitmap->pretile_xy;
}
/**
* Create a thumbnail of a page.
*
* \param bitmap the bitmap to draw to
* \param content content structure to thumbnail
* \return true on success and bitmap updated else false
*/
static nserror bitmap_render(struct bitmap *bitmap, hlcache_handle *content)
{
BBitmap *thumbnail;
BBitmap *small;
BBitmap *big;
BView *oldView;
BView *view;
BView *thumbView;
float width;
float height;
int big_width;
int big_height;
int depth;
struct redraw_context ctx;
ctx.interactive = false;
ctx.background_images = true;
ctx.plot = &nsbeos_plotters;
assert(content);
assert(bitmap);
thumbnail = nsbeos_bitmap_get_primary(bitmap);
width = thumbnail->Bounds().Width();
height = thumbnail->Bounds().Height();
depth = 32;
big_width = MIN(content_get_width(content), 1024);
big_height = (int)(((big_width * height) + (width / 2)) / width);
BRect contentRect(0, 0, big_width - 1, big_height - 1);
big = new BBitmap(contentRect, B_BITMAP_ACCEPTS_VIEWS, B_RGB32);
if (big->InitCheck() < B_OK) {
delete big;
return NSERROR_NOMEM;
}
small = new BBitmap(thumbnail->Bounds(),
B_BITMAP_ACCEPTS_VIEWS, B_RGB32);
if (small->InitCheck() < B_OK) {
delete small;
delete big;
return NSERROR_NOMEM;
}
//XXX: _lock ?
// backup the current gc
oldView = nsbeos_current_gc();
view = new BView(contentRect, "thumbnailer",
B_FOLLOW_NONE, B_WILL_DRAW);
big->AddChild(view);
thumbView = new BView(small->Bounds(), "thumbnail",
B_FOLLOW_NONE, B_WILL_DRAW);
small->AddChild(thumbView);
view->LockLooper();
/* impose our view on the content... */
nsbeos_current_gc_set(view);
/* render the content */
content_scaled_redraw(content, big_width, big_height, &ctx);
view->Sync();
view->UnlockLooper();
// restore the current gc
nsbeos_current_gc_set(oldView);
// now scale it down
//XXX: use Zeta's bilinear scaler ?
//#ifdef B_ZETA_VERSION
// err = ScaleBitmap(*shot, *scaledBmp);
//#else
thumbView->LockLooper();
thumbView->DrawBitmap(big, big->Bounds(), small->Bounds());
thumbView->Sync();
thumbView->UnlockLooper();
small->LockBits();
thumbnail->LockBits();
// copy it to the bitmap
memcpy(thumbnail->Bits(), small->Bits(), thumbnail->BitsLength());
thumbnail->UnlockBits();
small->UnlockBits();
bitmap_modified(bitmap);
// cleanup
small->RemoveChild(thumbView);
delete thumbView;
delete small;
big->RemoveChild(view);
delete view;
delete big;
return NSERROR_OK;
}
static struct gui_bitmap_table bitmap_table = {
.create = bitmap_create,
.destroy = bitmap_destroy,
.set_opaque = bitmap_set_opaque,
.get_opaque = bitmap_get_opaque,
.test_opaque = bitmap_test_opaque,
.get_buffer = bitmap_get_buffer,
.get_rowstride = bitmap_get_rowstride,
.get_width = bitmap_get_width,
.get_height = bitmap_get_height,
.get_bpp = bitmap_get_bpp,
.save = bitmap_save,
.modified = bitmap_modified,
.create = bitmap_create,
.destroy = bitmap_destroy,
.set_opaque = bitmap_set_opaque,
.get_opaque = bitmap_get_opaque,
.test_opaque = bitmap_test_opaque,
.get_buffer = bitmap_get_buffer,
.get_rowstride = bitmap_get_rowstride,
.get_width = bitmap_get_width,
.get_height = bitmap_get_height,
.get_bpp = bitmap_get_bpp,
.save = bitmap_save,
.modified = bitmap_modified,
.render = bitmap_render,
};
struct gui_bitmap_table *beos_bitmap_table = &bitmap_table;

163
beos/thumbnail.cpp
View File

@ -1,163 +0,0 @@
/*
* Copyright 2008 François Revol <mmu_man@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
* Page thumbnail creation (implementation).
*
* Thumbnails are created by setting the current drawing contexts to a BView
* attached to the BBitmap we are passed, and plotting the page at a small
* scale.
*/
#define __STDBOOL_H__ 1
#include <assert.h>
#include <sys/param.h>
#include <Bitmap.h>
#include <View.h>
extern "C" {
#include "content/content.h"
#include "content/urldb.h"
#include "desktop/plotters.h"
#include "desktop/browser.h"
#include "desktop/thumbnail.h"
#include "image/bitmap.h"
#include "desktop/font.h"
#include "utils/log.h"
}
#include "beos/scaffolding.h"
#include "beos/plotters.h"
#include "beos/bitmap.h"
// Zeta PRIVATE: in libzeta for now.
extern status_t ScaleBitmap(const BBitmap& inBitmap, BBitmap& outBitmap);
#warning XXX do we need to set bitmap:shadow ?
/**
* 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)
{
BBitmap *thumbnail;
BBitmap *small;
BBitmap *big;
BView *oldView;
BView *view;
BView *thumbView;
float width;
float height;
int big_width;
int big_height;
int depth;
struct redraw_context ctx;
ctx.interactive = false;
ctx.background_images = true;
ctx.plot = &nsbeos_plotters;
assert(content);
assert(bitmap);
thumbnail = nsbeos_bitmap_get_primary(bitmap);
width = thumbnail->Bounds().Width();
height = thumbnail->Bounds().Height();
depth = 32;
big_width = MIN(content_get_width(content), 1024);
big_height = (int)(((big_width * height) + (width / 2)) / width);
BRect contentRect(0, 0, big_width - 1, big_height - 1);
big = new BBitmap(contentRect, B_BITMAP_ACCEPTS_VIEWS, B_RGB32);
if (big->InitCheck() < B_OK) {
delete big;
return false;
}
small = new BBitmap(thumbnail->Bounds(),
B_BITMAP_ACCEPTS_VIEWS, B_RGB32);
if (small->InitCheck() < B_OK) {
delete small;
delete big;
return false;
}
//XXX: _lock ?
// backup the current gc
oldView = nsbeos_current_gc();
view = new BView(contentRect, "thumbnailer",
B_FOLLOW_NONE, B_WILL_DRAW);
big->AddChild(view);
thumbView = new BView(small->Bounds(), "thumbnail",
B_FOLLOW_NONE, B_WILL_DRAW);
small->AddChild(thumbView);
view->LockLooper();
/* impose our view on the content... */
nsbeos_current_gc_set(view);
/* render the content */
thumbnail_redraw(content, big_width, big_height, &ctx);
view->Sync();
view->UnlockLooper();
// restore the current gc
nsbeos_current_gc_set(oldView);
// now scale it down
//XXX: use Zeta's bilinear scaler ?
//#ifdef B_ZETA_VERSION
// err = ScaleBitmap(*shot, *scaledBmp);
//#else
thumbView->LockLooper();
thumbView->DrawBitmap(big, big->Bounds(), small->Bounds());
thumbView->Sync();
thumbView->UnlockLooper();
small->LockBits();
thumbnail->LockBits();
// copy it to the bitmap
memcpy(thumbnail->Bits(), small->Bits(), thumbnail->BitsLength());
thumbnail->UnlockBits();
small->UnlockBits();
bitmap_modified(bitmap);
// cleanup
small->RemoveChild(thumbView);
delete thumbView;
delete small;
big->RemoveChild(view);
delete view;
delete big;
return true;
}