mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-12-05 04:11:56 +03:00
546 lines
12 KiB
C
546 lines
12 KiB
C
/*
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* Copyright 2008, 2009, 2012 Chris Young <chris@unsatisfactorysoftware.co.uk>
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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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#include "amiga/os3support.h"
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#include "assert.h"
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#include "amiga/bitmap.h"
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#include "amiga/download.h"
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#include <proto/exec.h>
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#include <proto/Picasso96API.h>
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#ifdef __amigaos4__
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#include <graphics/blitattr.h>
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#include <graphics/composite.h>
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#endif
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#include <graphics/gfxbase.h>
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#include "desktop/options.h"
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#include <proto/datatypes.h>
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#include <datatypes/pictureclass.h>
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#include <proto/dos.h>
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#include <proto/intuition.h>
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#include <proto/utility.h>
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#include "utils/messages.h"
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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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void *bitmap_create(int width, int height, unsigned int state)
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{
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struct bitmap *bitmap;
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bitmap = AllocVec(sizeof(struct bitmap),MEMF_PRIVATE | MEMF_CLEAR);
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if(bitmap)
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{
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bitmap->pixdata = AllocVecTags(width*height*4,
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AVT_Type,MEMF_PRIVATE,
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AVT_ClearWithValue,0xff,
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TAG_DONE);
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bitmap->width = width;
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bitmap->height = height;
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if(state & BITMAP_OPAQUE) bitmap->opaque = true;
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else bitmap->opaque = false;
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}
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return bitmap;
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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 bitmap 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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unsigned char *bitmap_get_buffer(void *bitmap)
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{
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struct bitmap *bm = bitmap;
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return bm->pixdata;
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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 bitmap 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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size_t bitmap_get_rowstride(void *bitmap)
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{
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struct bitmap *bm = bitmap;
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if(bm)
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{
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return ((bm->width)*4);
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}
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else
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{
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return 0;
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}
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}
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/**
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* Free a bitmap.
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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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void bitmap_destroy(void *bitmap)
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{
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struct bitmap *bm = bitmap;
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if(bm)
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{
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if((bm->nativebm) && (bm->dto == NULL)) {
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p96FreeBitMap(bm->nativebm);
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}
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if(bm->dto) {
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DisposeDTObject(bm->dto);
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}
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if(bm->native_mask) FreeRaster(bm->native_mask, bm->width, bm->height);
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FreeVec(bm->pixdata);
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bm->pixdata = NULL;
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bm->nativebm = NULL;
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bm->native_mask = NULL;
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bm->dto = NULL;
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FreeVec(bm);
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bm = NULL;
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}
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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 bitmap a bitmap, as returned by bitmap_create()
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* \param path pathname for file
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* \return true on success, false on error and error reported
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*/
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bool bitmap_save(void *bitmap, const char *path, unsigned flags)
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{
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int err = 0;
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Object *dto = NULL;
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if(!ami_download_check_overwrite(path, NULL, 0)) return false;
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if(dto = ami_datatype_object_from_bitmap(bitmap))
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{
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err = SaveDTObjectA(dto, NULL, NULL, path, DTWM_IFF, FALSE, NULL);
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DisposeDTObject(dto);
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}
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if(err == 0) return false;
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else 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 bitmap a bitmap, as returned by bitmap_create()
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*/
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void bitmap_modified(void *bitmap) {
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struct bitmap *bm = bitmap;
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if((bm->nativebm) && (bm->dto == NULL))
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p96FreeBitMap(bm->nativebm);
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if(bm->dto) DisposeDTObject(bm->dto);
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if(bm->native_mask) FreeRaster(bm->native_mask, bm->width, bm->height);
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bm->nativebm = NULL;
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bm->dto = NULL;
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bm->native_mask = NULL;
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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 bitmap 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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void bitmap_set_opaque(void *bitmap, bool opaque)
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{
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struct bitmap *bm = bitmap;
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assert(bitmap);
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bm->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 bitmap 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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bool bitmap_test_opaque(void *bitmap)
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{
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struct bitmap *bm = bitmap;
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uint32 p = bm->width * bm->height;
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uint32 a = 0;
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uint32 *bmi = (uint32 *) bm->pixdata;
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assert(bitmap);
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for(a=0;a<p;a+=4)
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{
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if ((*bmi & 0x000000ffU) != 0x000000ffU) return false;
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bmi++;
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}
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return true;
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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 bitmap a bitmap, as returned by bitmap_create()
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*/
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bool bitmap_get_opaque(void *bitmap)
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{
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struct bitmap *bm = bitmap;
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assert(bitmap);
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return bm->opaque;
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}
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int bitmap_get_width(void *bitmap)
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{
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struct bitmap *bm = bitmap;
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if(bm)
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{
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return(bm->width);
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}
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else
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{
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return 0;
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}
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}
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int bitmap_get_height(void *bitmap)
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{
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struct bitmap *bm = bitmap;
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if(bm)
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{
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return(bm->height);
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}
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else
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{
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return 0;
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}
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}
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/**
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* Find the bytes per pixel 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 pixel
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*/
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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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Object *ami_datatype_object_from_bitmap(struct bitmap *bitmap)
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{
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Object *dto;
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struct BitMapHeader *bmhd;
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if(dto = NewDTObject(NULL,
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DTA_SourceType,DTST_RAM,
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DTA_GroupID,GID_PICTURE,
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//DTA_BaseName,"ilbm",
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PDTA_DestMode,PMODE_V43,
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TAG_DONE))
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{
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if(GetDTAttrs(dto,PDTA_BitMapHeader,&bmhd,TAG_DONE))
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{
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bmhd->bmh_Width = (UWORD)bitmap_get_width(bitmap);
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bmhd->bmh_Height = (UWORD)bitmap_get_height(bitmap);
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bmhd->bmh_Depth = (UBYTE)bitmap_get_bpp(bitmap) * 8;
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if(!bitmap_get_opaque(bitmap)) bmhd->bmh_Masking = mskHasAlpha;
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}
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SetDTAttrs(dto,NULL,NULL,
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DTA_ObjName,bitmap->url,
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DTA_ObjAnnotation,bitmap->title,
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DTA_ObjAuthor,messages_get("NetSurf"),
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DTA_NominalHoriz,bitmap_get_width(bitmap),
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DTA_NominalVert,bitmap_get_height(bitmap),
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PDTA_SourceMode,PMODE_V43,
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TAG_DONE);
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IDoMethod(dto,PDTM_WRITEPIXELARRAY,bitmap_get_buffer(bitmap),
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PBPAFMT_RGBA,bitmap_get_rowstride(bitmap),0,0,
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bitmap_get_width(bitmap),bitmap_get_height(bitmap));
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}
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return dto;
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}
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/* Quick way to get an object on disk into a struct bitmap */
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struct bitmap *ami_bitmap_from_datatype(char *filename)
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{
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Object *dto;
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struct bitmap *bm = NULL;
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if(dto = NewDTObject(filename,
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DTA_GroupID, GID_PICTURE,
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PDTA_DestMode, PMODE_V43,
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TAG_DONE))
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{
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struct BitMapHeader *bmh;
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struct RastPort rp;
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if(GetDTAttrs(dto, PDTA_BitMapHeader, &bmh, TAG_DONE))
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{
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bm = bitmap_create(bmh->bmh_Width, bmh->bmh_Height, 0);
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IDoMethod(dto, PDTM_READPIXELARRAY, bitmap_get_buffer(bm),
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PBPAFMT_RGBA, bitmap_get_rowstride(bm), 0, 0,
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bmh->bmh_Width, bmh->bmh_Height);
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bitmap_set_opaque(bm, bitmap_test_opaque(bm));
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}
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DisposeDTObject(dto);
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}
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return bm;
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}
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static struct BitMap *ami_bitmap_get_truecolour(struct bitmap *bitmap,int width,int height,struct BitMap *friendbm)
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{
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struct RenderInfo ri;
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struct BitMap *tbm = NULL;
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struct RastPort trp;
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if(!bitmap) return NULL;
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if(bitmap->nativebm)
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{
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if((bitmap->nativebmwidth == width) && (bitmap->nativebmheight==height))
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{
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tbm = bitmap->nativebm;
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return tbm;
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}
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else if((bitmap->nativebmwidth == bitmap->width) && (bitmap->nativebmheight==bitmap->height))
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{
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tbm = bitmap->nativebm;
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}
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else
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{
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if(bitmap->nativebm) p96FreeBitMap(bitmap->nativebm);
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bitmap->nativebm = NULL;
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}
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}
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if(!tbm)
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{
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ri.Memory = bitmap->pixdata;
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ri.BytesPerRow = bitmap->width * 4;
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ri.RGBFormat = AMI_BITMAP_FORMAT;
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if(tbm = p96AllocBitMap(bitmap->width, bitmap->height, 32, 0,
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friendbm, AMI_BITMAP_FORMAT))
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{
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InitRastPort(&trp);
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trp.BitMap = tbm;
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p96WritePixelArray((struct RenderInfo *)&ri, 0, 0, &trp, 0, 0,
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bitmap->width, bitmap->height);
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}
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if(nsoption_int(cache_bitmaps) == 2)
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{
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bitmap->nativebm = tbm;
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bitmap->nativebmwidth = bitmap->width;
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bitmap->nativebmheight = bitmap->height;
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}
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}
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if((bitmap->width != width) || (bitmap->height != height))
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{
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struct BitMap *scaledbm;
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struct BitScaleArgs bsa;
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scaledbm = p96AllocBitMap(width, height, 32, BMF_DISPLAYABLE,
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friendbm, AMI_BITMAP_FORMAT);
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if(GfxBase->LibNode.lib_Version >= 53) // AutoDoc says v52, but this function isn't in OS4.0, so checking for v53 (OS4.1)
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{
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uint32 comptype = COMPOSITE_Src;
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uint32 flags = 0;
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if(bitmap->opaque) flags |= COMPFLAG_IgnoreDestAlpha;
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if(nsoption_bool(scale_quality)) flags |= COMPFLAG_SrcFilter;
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CompositeTags(comptype,tbm,scaledbm,
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COMPTAG_ScaleX,COMP_FLOAT_TO_FIX(width/bitmap->width),
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COMPTAG_ScaleY,COMP_FLOAT_TO_FIX(height/bitmap->height),
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COMPTAG_Flags, flags,
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COMPTAG_DestX,0,
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COMPTAG_DestY,0,
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COMPTAG_DestWidth,width,
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COMPTAG_DestHeight,height,
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COMPTAG_OffsetX,0,
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COMPTAG_OffsetY,0,
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COMPTAG_FriendBitMap,friendbm,
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TAG_DONE);
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}
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else /* do it the old-fashioned way. This is pretty slow, but probably
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uses Composite() on OS4.1 anyway, so we're only saving a blit really. */
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{
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bsa.bsa_SrcX = 0;
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bsa.bsa_SrcY = 0;
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bsa.bsa_SrcWidth = bitmap->width;
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bsa.bsa_SrcHeight = bitmap->height;
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bsa.bsa_DestX = 0;
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bsa.bsa_DestY = 0;
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// bsa.bsa_DestWidth = width;
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// bsa.bsa_DestHeight = height;
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bsa.bsa_XSrcFactor = bitmap->width;
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bsa.bsa_XDestFactor = width;
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bsa.bsa_YSrcFactor = bitmap->height;
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bsa.bsa_YDestFactor = height;
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bsa.bsa_SrcBitMap = tbm;
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bsa.bsa_DestBitMap = scaledbm;
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bsa.bsa_Flags = 0;
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BitMapScale(&bsa);
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}
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if(bitmap->nativebm != tbm) p96FreeBitMap(bitmap->nativebm);
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p96FreeBitMap(tbm);
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tbm = scaledbm;
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bitmap->nativebm = NULL;
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if(nsoption_int(cache_bitmaps) >= 1)
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{
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bitmap->nativebm = tbm;
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bitmap->nativebmwidth = width;
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bitmap->nativebmheight = height;
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}
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}
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return tbm;
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}
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PLANEPTR ami_bitmap_get_mask(struct bitmap *bitmap, int width,
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int height, struct BitMap *n_bm)
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{
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uint32 *bmi = (uint32 *) bitmap->pixdata;
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UBYTE maskbit = 0;
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ULONG bm_width;
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int y, x, bpr;
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if((height != bitmap->height) || (width != bitmap->width)) return NULL;
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if(bitmap_get_opaque(bitmap) == true) return NULL;
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if(bitmap->native_mask) return bitmap->native_mask;
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bm_width = GetBitMapAttr(n_bm, BMA_WIDTH);
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bpr = RASSIZE(bm_width, 1);
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bitmap->native_mask = AllocRaster(bm_width, height);
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SetMem(bitmap->native_mask, 0, bpr * height);
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for(y=0; y<height; y++) {
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for(x=0; x<width; x++) {
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if ((*bmi & 0x000000ffU) <= (ULONG)nsoption_int(mask_alpha)) maskbit = 0;
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else maskbit = 1;
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bmi++;
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bitmap->native_mask[(y*bpr) + (x/8)] |=
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maskbit << (7 - (x % 8));
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}
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}
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return bitmap->native_mask;
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}
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static struct BitMap *ami_bitmap_get_palettemapped(struct bitmap *bitmap,
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int width, int height)
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{
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struct BitMap *dtbm;
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/* Dispose the DataTypes object if we've performed a layout already,
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and we need to scale, as scaling can only be performed before
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the first GM_LAYOUT */
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if(bitmap->dto &&
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((bitmap->nativebmwidth != width) ||
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(bitmap->nativebmheight != height))) {
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DisposeDTObject(bitmap->dto);
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bitmap->dto = NULL;
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}
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if(bitmap->dto == NULL) {
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bitmap->dto = ami_datatype_object_from_bitmap(bitmap);
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SetDTAttrs(bitmap->dto, NULL, NULL,
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PDTA_Screen, scrn,
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PDTA_ScaleQuality, nsoption_bool(scale_quality),
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PDTA_DitherQuality, nsoption_int(dither_quality),
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PDTA_FreeSourceBitMap, TRUE,
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TAG_DONE);
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if((bitmap->width != width) || (bitmap->height != height)) {
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IDoMethod(bitmap->dto, PDTM_SCALE, width, height, 0);
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}
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if((DoDTMethod(bitmap->dto, 0, 0, DTM_PROCLAYOUT, 0, 1)) == 0)
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return NULL;
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}
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GetDTAttrs(bitmap->dto,
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PDTA_DestBitMap, &dtbm,
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TAG_END);
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bitmap->nativebmwidth = width;
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bitmap->nativebmheight = height;
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ami_bitmap_get_mask(bitmap, width, height, dtbm);
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return dtbm;
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}
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struct BitMap *ami_bitmap_get_native(struct bitmap *bitmap,
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int width, int height, struct BitMap *friendbm)
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{
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if(ami_plot_screen_is_palettemapped() == true) {
|
|
return ami_bitmap_get_palettemapped(bitmap, width, height);
|
|
} else {
|
|
return ami_bitmap_get_truecolour(bitmap, width, height, friendbm);
|
|
}
|
|
}
|