557 lines
16 KiB
C++
557 lines
16 KiB
C++
/*
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* Copyright 2008 François Revol <mmu_man@users.sourceforge.net>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file
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* BeOS implementation of generic bitmaps.
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*
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* This implements the interface given by image/bitmap.h using BBitmap.
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*/
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#define __STDBOOL_H__ 1
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#include <assert.h>
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#include <sys/param.h>
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#include <string.h>
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#include <Bitmap.h>
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#include <BitmapStream.h>
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#include <File.h>
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#include <GraphicsDefs.h>
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#include <TranslatorFormats.h>
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#include <TranslatorRoster.h>
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#include <View.h>
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#include <stdlib.h>
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extern "C" {
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#include "utils/log.h"
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#include "content/content.h"
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#include "content/urldb.h"
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#include "desktop/plotters.h"
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#include "netsurf/browser_window.h"
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#include "netsurf/bitmap.h"
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}
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#include "beos/bitmap.h"
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#include "beos/gui.h"
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#include "beos/scaffolding.h"
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#include "beos/plotters.h"
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struct bitmap {
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BBitmap *primary;
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BBitmap *shadow; // in NetSurf's ABGR order
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BBitmap *pretile_x;
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BBitmap *pretile_y;
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BBitmap *pretile_xy;
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bool opaque;
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};
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#define MIN_PRETILE_WIDTH 256
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#define MIN_PRETILE_HEIGHT 256
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#warning TODO: check rgba order
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#warning TODO: add correct locking (not strictly required)
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/**
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* Convert to BeOS RGBA32_LITTLE (strictly BGRA) from NetSurf's favoured ABGR format.
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*
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* Copies the converted data elsewhere. Operation is rotate left 8 bits.
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*
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* \param src Source 32-bit pixels arranged in ABGR order.
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* \param dst Output data in BGRA order.
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* \param width Width of the bitmap
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* \param height Height of the bitmap
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* \param rowstride Number of bytes to skip after each row (this implementation
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* requires this to be a multiple of 4.)
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*/
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static inline void nsbeos_rgba_to_bgra(void *src,
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void *dst,
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int width,
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int height,
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size_t rowstride)
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{
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struct abgr { uint8 a, b, g, r; };
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struct rgba { uint8 r, g, b ,a; };
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struct bgra { uint8 b, g, r, a; };
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struct rgba *from = (struct rgba *)src;
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struct bgra *to = (struct bgra *)dst;
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rowstride >>= 2;
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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to[x].b = from[x].b;
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to[x].g = from[x].g;
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to[x].r = from[x].r;
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to[x].a = from[x].a;
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/*
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if (from[x].a == 0)
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*(rgb_color *)&to[x] = B_TRANSPARENT_32_BIT;
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*/
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}
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from += rowstride;
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to += rowstride;
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}
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}
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/**
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* Create a bitmap.
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*
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* \param width width of image in pixels
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* \param height width of image in pixels
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* \param state a flag word indicating the initial state
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* \return an opaque struct bitmap, or NULL on memory exhaustion
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*/
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static void *bitmap_create(int width, int height, unsigned int state)
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{
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struct bitmap *bmp = (struct bitmap *)malloc(sizeof(struct bitmap));
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if (bmp == NULL)
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return NULL;
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int32 flags = 0;
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if (state & BITMAP_CLEAR_MEMORY)
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flags |= B_BITMAP_CLEAR_TO_WHITE;
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BRect frame(0, 0, width - 1, height - 1);
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//XXX: bytes per row ?
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bmp->primary = new BBitmap(frame, flags, B_RGBA32);
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bmp->shadow = new BBitmap(frame, flags, B_RGBA32);
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bmp->pretile_x = bmp->pretile_y = bmp->pretile_xy = NULL;
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bmp->opaque = (state & BITMAP_OPAQUE) != 0;
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return bmp;
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}
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/**
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* Sets whether a bitmap should be plotted opaque
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*
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* \param vbitmap a bitmap, as returned by bitmap_create()
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* \param opaque whether the bitmap should be plotted opaque
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*/
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static void bitmap_set_opaque(void *vbitmap, bool opaque)
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{
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struct bitmap *bitmap = (struct bitmap *)vbitmap;
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assert(bitmap);
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bitmap->opaque = opaque;
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}
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/**
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* Tests whether a bitmap has an opaque alpha channel
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*
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* \param vbitmap a bitmap, as returned by bitmap_create()
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* \return whether the bitmap is opaque
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*/
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static bool bitmap_test_opaque(void *vbitmap)
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{
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struct bitmap *bitmap = (struct bitmap *)vbitmap;
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assert(bitmap);
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/* todo: test if bitmap is opaque */
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return false;
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}
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/**
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* Gets whether a bitmap should be plotted opaque
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*
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* \param vbitmap a bitmap, as returned by bitmap_create()
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*/
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static bool bitmap_get_opaque(void *vbitmap)
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{
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struct bitmap *bitmap = (struct bitmap *)vbitmap;
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assert(bitmap);
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return bitmap->opaque;
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}
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/**
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* Return a pointer to the pixel data in a bitmap.
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*
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* \param vbitmap a bitmap, as returned by bitmap_create()
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* \return pointer to the pixel buffer
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*
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* The pixel data is packed as BITMAP_FORMAT, possibly with padding at the end
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* of rows. The width of a row in bytes is given by bitmap_get_rowstride().
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*/
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static unsigned char *bitmap_get_buffer(void *vbitmap)
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{
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struct bitmap *bitmap = (struct bitmap *)vbitmap;
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assert(bitmap);
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return (unsigned char *)(bitmap->shadow->Bits());
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}
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/**
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* Find the width of a pixel row in bytes.
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*
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* \param vbitmap a bitmap, as returned by bitmap_create()
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* \return width of a pixel row in the bitmap
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*/
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static size_t bitmap_get_rowstride(void *vbitmap)
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{
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struct bitmap *bitmap = (struct bitmap *)vbitmap;
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assert(bitmap);
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return (bitmap->primary->BytesPerRow());
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}
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/**
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* Find the bytes per pixels of a bitmap.
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*
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* \param vbitmap a bitmap, as returned by bitmap_create()
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* \return bytes per pixels of the bitmap
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*/
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static size_t bitmap_get_bpp(void *vbitmap)
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{
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struct bitmap *bitmap = (struct bitmap *)vbitmap;
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assert(bitmap);
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return 4;
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}
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/**
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* Free pretiles of a bitmap.
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*
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* \param bitmap The bitmap to free the pretiles of.
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*/
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static void nsbeos_bitmap_free_pretiles(struct bitmap *bitmap)
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{
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#define FREE_TILE(XY) if (bitmap->pretile_##XY) delete (bitmap->pretile_##XY); bitmap->pretile_##XY = NULL
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FREE_TILE(x);
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FREE_TILE(y);
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FREE_TILE(xy);
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#undef FREE_TILE
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}
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/**
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* Free a bitmap.
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*
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* \param vbitmap a bitmap, as returned by bitmap_create()
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*/
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static void bitmap_destroy(void *vbitmap)
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{
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struct bitmap *bitmap = (struct bitmap *)vbitmap;
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assert(bitmap);
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nsbeos_bitmap_free_pretiles(bitmap);
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delete bitmap->primary;
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delete bitmap->shadow;
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free(bitmap);
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}
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/**
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* Save a bitmap in the platform's native format.
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*
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* \param vbitmap a bitmap, as returned by bitmap_create()
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* \param path pathname for file
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* \param flags modify the behaviour of the save
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* \return true on success, false on error and error reported
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*/
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static bool bitmap_save(void *vbitmap, const char *path, unsigned flags)
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{
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struct bitmap *bitmap = (struct bitmap *)vbitmap;
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BTranslatorRoster *roster = BTranslatorRoster::Default();
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BBitmapStream stream(bitmap->primary);
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BFile file(path, B_WRITE_ONLY | B_CREATE_FILE);
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uint32 type = B_PNG_FORMAT;
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if (file.InitCheck() < B_OK)
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return false;
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if (roster->Translate(&stream, NULL, NULL, &file, type) < B_OK)
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return false;
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return true;
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}
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/**
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* The bitmap image has changed, so flush any persistant cache.
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*
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* \param vbitmap a bitmap, as returned by bitmap_create()
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*/
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void bitmap_modified(void *vbitmap)
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{
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struct bitmap *bitmap = (struct bitmap *)vbitmap;
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// convert the shadow (ABGR) to into the primary bitmap
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nsbeos_rgba_to_bgra(bitmap->shadow->Bits(), bitmap->primary->Bits(),
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bitmap->primary->Bounds().Width() + 1,
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bitmap->primary->Bounds().Height() + 1,
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bitmap->primary->BytesPerRow());
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nsbeos_bitmap_free_pretiles(bitmap);
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}
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static int bitmap_get_width(void *vbitmap)
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{
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struct bitmap *bitmap = (struct bitmap *)vbitmap;
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return bitmap->primary->Bounds().Width() + 1;
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}
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static int bitmap_get_height(void *vbitmap)
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{
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struct bitmap *bitmap = (struct bitmap *)vbitmap;
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return bitmap->primary->Bounds().Height() + 1;
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}
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static BBitmap *
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nsbeos_bitmap_generate_pretile(BBitmap *primary, int repeat_x, int repeat_y)
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{
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int width = primary->Bounds().Width() + 1;
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int height = primary->Bounds().Height() + 1;
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size_t primary_stride = primary->BytesPerRow();
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BRect frame(0, 0, width * repeat_x - 1, height * repeat_y - 1);
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BBitmap *result = new BBitmap(frame, 0, B_RGBA32);
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char *target_buffer = (char *)result->Bits();
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int x,y,row;
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/* This algorithm won't work if the strides are not multiples */
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assert((size_t)(result->BytesPerRow()) ==
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(primary_stride * repeat_x));
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if (repeat_x == 1 && repeat_y == 1) {
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delete result;
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// just return a copy
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return new BBitmap(primary);
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}
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for (y = 0; y < repeat_y; ++y) {
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char *primary_buffer = (char *)primary->Bits();
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for (row = 0; row < height; ++row) {
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for (x = 0; x < repeat_x; ++x) {
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memcpy(target_buffer,
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primary_buffer, primary_stride);
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target_buffer += primary_stride;
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}
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primary_buffer += primary_stride;
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}
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}
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return result;
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}
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/**
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* The primary image associated with this bitmap object.
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*
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* \param bitmap a bitmap, as returned by bitmap_create()
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*/
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BBitmap *
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nsbeos_bitmap_get_primary(struct bitmap* bitmap)
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{
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return bitmap->primary;
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}
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/**
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* The X-pretiled image associated with this bitmap object.
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*
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* \param bitmap a bitmap, as returned by bitmap_create()
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*/
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BBitmap *
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nsbeos_bitmap_get_pretile_x(struct bitmap* bitmap)
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{
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if (!bitmap->pretile_x) {
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int width = bitmap->primary->Bounds().Width() + 1;
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int xmult = (MIN_PRETILE_WIDTH + width - 1)/width;
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LOG("Pretiling %p for X*%d", bitmap, xmult);
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bitmap->pretile_x = nsbeos_bitmap_generate_pretile(bitmap->primary, xmult, 1);
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}
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return bitmap->pretile_x;
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}
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/**
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* The Y-pretiled image associated with this bitmap object.
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*
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* \param bitmap a bitmap, as returned by bitmap_create()
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*/
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BBitmap *
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nsbeos_bitmap_get_pretile_y(struct bitmap* bitmap)
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{
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if (!bitmap->pretile_y) {
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int height = bitmap->primary->Bounds().Height() + 1;
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int ymult = (MIN_PRETILE_HEIGHT + height - 1)/height;
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LOG("Pretiling %p for Y*%d", bitmap, ymult);
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bitmap->pretile_y = nsbeos_bitmap_generate_pretile(bitmap->primary, 1, ymult);
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}
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return bitmap->pretile_y;
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}
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/**
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* The XY-pretiled image associated with this bitmap object.
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*
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* \param bitmap a bitmap, as returned by bitmap_create()
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*/
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BBitmap *
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nsbeos_bitmap_get_pretile_xy(struct bitmap* bitmap)
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{
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if (!bitmap->pretile_xy) {
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int width = bitmap->primary->Bounds().Width() + 1;
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int height = bitmap->primary->Bounds().Height() + 1;
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int xmult = (MIN_PRETILE_WIDTH + width - 1)/width;
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int ymult = (MIN_PRETILE_HEIGHT + height - 1)/height;
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LOG("Pretiling %p for X*%d Y*%d", bitmap, xmult, ymult);
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bitmap->pretile_xy = nsbeos_bitmap_generate_pretile(bitmap->primary, xmult, ymult);
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}
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return bitmap->pretile_xy;
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}
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/**
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* Create a thumbnail of a page.
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*
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* \param bitmap the bitmap to draw to
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* \param content content structure to thumbnail
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* \return true on success and bitmap updated else false
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*/
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static nserror bitmap_render(struct bitmap *bitmap, hlcache_handle *content)
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{
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BBitmap *thumbnail;
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BBitmap *small;
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BBitmap *big;
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BView *oldView;
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BView *view;
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BView *thumbView;
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float width;
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float height;
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int big_width;
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int big_height;
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int depth;
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struct redraw_context ctx;
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ctx.interactive = false;
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ctx.background_images = true;
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ctx.plot = &nsbeos_plotters;
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assert(content);
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assert(bitmap);
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thumbnail = nsbeos_bitmap_get_primary(bitmap);
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width = thumbnail->Bounds().Width();
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height = thumbnail->Bounds().Height();
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depth = 32;
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big_width = MIN(content_get_width(content), 1024);
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big_height = (int)(((big_width * height) + (width / 2)) / width);
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BRect contentRect(0, 0, big_width - 1, big_height - 1);
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big = new BBitmap(contentRect, B_BITMAP_ACCEPTS_VIEWS, B_RGB32);
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if (big->InitCheck() < B_OK) {
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delete big;
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return NSERROR_NOMEM;
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}
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small = new BBitmap(thumbnail->Bounds(),
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B_BITMAP_ACCEPTS_VIEWS, B_RGB32);
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if (small->InitCheck() < B_OK) {
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delete small;
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delete big;
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return NSERROR_NOMEM;
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}
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//XXX: _lock ?
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// backup the current gc
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oldView = nsbeos_current_gc();
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view = new BView(contentRect, "thumbnailer",
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B_FOLLOW_NONE, B_WILL_DRAW);
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big->AddChild(view);
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thumbView = new BView(small->Bounds(), "thumbnail",
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B_FOLLOW_NONE, B_WILL_DRAW);
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small->AddChild(thumbView);
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view->LockLooper();
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/* impose our view on the content... */
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nsbeos_current_gc_set(view);
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/* render the content */
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content_scaled_redraw(content, big_width, big_height, &ctx);
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view->Sync();
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view->UnlockLooper();
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// restore the current gc
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nsbeos_current_gc_set(oldView);
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// now scale it down
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//XXX: use Zeta's bilinear scaler ?
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//#ifdef B_ZETA_VERSION
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// err = ScaleBitmap(*shot, *scaledBmp);
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//#else
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thumbView->LockLooper();
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thumbView->DrawBitmap(big, big->Bounds(), small->Bounds());
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thumbView->Sync();
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thumbView->UnlockLooper();
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small->LockBits();
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thumbnail->LockBits();
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// copy it to the bitmap
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memcpy(thumbnail->Bits(), small->Bits(), thumbnail->BitsLength());
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thumbnail->UnlockBits();
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small->UnlockBits();
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bitmap_modified(bitmap);
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// cleanup
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small->RemoveChild(thumbView);
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delete thumbView;
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delete small;
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big->RemoveChild(view);
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delete view;
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delete big;
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return NSERROR_OK;
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}
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static struct gui_bitmap_table bitmap_table = {
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/*.create =*/ bitmap_create,
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/*.destroy =*/ bitmap_destroy,
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/*.set_opaque =*/ bitmap_set_opaque,
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/*.get_opaque =*/ bitmap_get_opaque,
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/*.test_opaque =*/ bitmap_test_opaque,
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/*.get_buffer =*/ bitmap_get_buffer,
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/*.get_rowstride =*/ bitmap_get_rowstride,
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/*.get_width =*/ bitmap_get_width,
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/*.get_height =*/ bitmap_get_height,
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/*.get_bpp =*/ bitmap_get_bpp,
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/*.save =*/ bitmap_save,
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/*.modified =*/ bitmap_modified,
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/*.render =*/ bitmap_render,
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};
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struct gui_bitmap_table *beos_bitmap_table = &bitmap_table;
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