netsurf/gtk/gtk_bitmap.c
John Tytgat 35d3d6d0bb First merge of Adam Blokus' GSoC work from his branch 'branches/adamblokus/netsurf'.
Merged revisions 4212-4552,4554-4709,4711-4724 via svnmerge from 
svn://svn.netsurf-browser.org/branches/adamblokus/netsurf

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  r4212 | adamblokus | 2008-05-26 19:42:31 +0200 (Mon, 26 May 2008) | 4 lines
  
  Pdf plotting skeleton pinned on Print Preview in GTK.
  Just creates a file and draws lines. 
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  r4213 | adamblokus | 2008-05-27 00:11:03 +0200 (Tue, 27 May 2008) | 4 lines
  
  Pdf plotter - added drawing some graphic primitives.
  Still with limited functionality, but a snapshot of the
  currently viewed page can be made and resembles the original.
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  r4214 | adamblokus | 2008-05-27 11:43:31 +0200 (Tue, 27 May 2008) | 2 lines
  
  Corrected encoding name
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  r4215 | adamblokus | 2008-05-27 12:47:26 +0200 (Tue, 27 May 2008) | 3 lines
  
  Colours and polygons added.
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  r4217 | adamblokus | 2008-05-27 21:39:35 +0200 (Tue, 27 May 2008) | 6 lines
  
  Added rectangles, filled boxes and clipping.
  Taken into consideration joty's comments.
  Added a todo list for this part.
  Added some debug stuff and checking boundaries.
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  r4218 | adamblokus | 2008-05-28 12:37:30 +0200 (Wed, 28 May 2008) | 2 lines
  
  Added path ploting (not sure if valid argument order for bezier) and dashed/dotted line styles
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  r4221 | adamblokus | 2008-05-28 22:11:05 +0200 (Wed, 28 May 2008) | 3 lines
  
  Some more options in graphic primitives and normalizing some parameters.
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  r4235 | adamblokus | 2008-05-31 22:54:56 +0200 (Sat, 31 May 2008) | 4 lines
  
  Plotting changed as jmb suggested (is the least invasive one from the possible)
  Added dummy bitmap plotting - way of plotting an image is determined by its type. 
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  r4251 | adamblokus | 2008-06-03 17:12:15 +0200 (Tue, 03 Jun 2008) | 3 lines
  
  Added plotting jpg and png images - quite a lot to improve in this code, but it seems to work ;)
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  r4263 | adamblokus | 2008-06-05 14:20:32 +0200 (Thu, 05 Jun 2008) | 3 lines
  
  Added hadling images other than png and jpeg - with transparency.
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  r4267 | adamblokus | 2008-06-06 15:36:34 +0200 (Fri, 06 Jun 2008) | 5 lines
  
  Added handling NULL-returns from all mallocs.
  Added plot_bitmap_tile handling.
  Changed code style a little.
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  r4327 | adamblokus | 2008-06-12 17:46:34 +0200 (Thu, 12 Jun 2008) | 5 lines
  
  Added a first prototype of the paged-output organization.
  Still not sure about naming, file locations etc.
  Works with the same pdf plotting as before.
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  r4328 | adamblokus | 2008-06-13 13:52:15 +0200 (Fri, 13 Jun 2008) | 4 lines
  
  Added primitive width adjustment and outputing the whole
  website in multiple pages.
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  r4336 | joty | 2008-06-15 15:06:57 +0200 (Sun, 15 Jun 2008) | 1 line
  
  Fix RISC OS build failure (change r4235 wasn't complete).
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  r4337 | joty | 2008-06-15 18:15:32 +0200 (Sun, 15 Jun 2008) | 16 lines
  
  This enables "Export PDF" in RISC OS build:
  
  - Docs/Doxyfile(PREDEFINED): Added WITH_PDF_EXPORT
  - Makefile.sources(S_PDF): Add to RISC OS target as well.
  - utils/config.h: Define WITH_PDF_EXPORT which controls if we want to have
    PDF export functionality or not.
  - riscos/save_pdf.c,riscos/save_pdf.h(save_as_pdf): Use PDF print API made
    by Adam Blokus to write a PDF file under RISC OS.
  - riscos/save.c: Call save_as_pdf added.
  - riscos/menus.c: Add 'Export->PDF' menu entry.
  - riscos/menus.h(menu_action): Added BROWSER_EXPORT_PDF.
  - desktop/gui.h(gui_save_type): Added GUI_SAVE_PDF.
  - desktop/print.c(print_run): Added return value.
  - Makefile(CCACHE): Moved closed to the place where CC is set for the first time.
    (LDFLAGS): Centralised adding all non-pkgconfig libraries and added Haru + PNG libs.
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  r4343 | adamblokus | 2008-06-16 01:08:52 +0200 (Mon, 16 Jun 2008) | 3 lines
  
  Added margins and page size adjustment.
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  r4412 | adamblokus | 2008-06-21 20:22:07 +0200 (Sat, 21 Jun 2008) | 4 lines
  
  Added 'fuzzy' margins on page bottom. 
  Disabled direct png embedding, because it is too unstable in Haru now.
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  r4421 | adamblokus | 2008-06-22 18:52:28 +0200 (Sun, 22 Jun 2008) | 2 lines
  
  Added "Save as.." dialog and Export->PDF menu entry. Print preview still works with default path.
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  r4437 | adamblokus | 2008-06-25 02:44:46 +0200 (Wed, 25 Jun 2008) | 4 lines
  
  Added skeleton of applying loose layout.
  Minor code cleaning-up.
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  r4492 | adamblokus | 2008-07-02 09:02:42 +0200 (Wed, 02 Jul 2008) | 5 lines
  
  Implemented the elementar ideas of the loose layout.
  Added scaling in the printing routine.
  Added some basic demonstrations.
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  r4493 | adamblokus | 2008-07-02 09:05:55 +0200 (Wed, 02 Jul 2008) | 3 lines
  
  Cleaned up the loosing code - commited to much of leftover rubbish code.
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  r4507 | adamblokus | 2008-07-04 14:25:48 +0200 (Fri, 04 Jul 2008) | 4 lines
  
  Added duplicating box tree and current content - window flickering during printing solved.
  Minor error checking after new HPDF_Image_AddSMask call.
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  r4515 | adamblokus | 2008-07-06 22:28:16 +0200 (Sun, 06 Jul 2008) | 2 lines
  
  Changes in loosen layout (image resizing).
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  r4517 | adamblokus | 2008-07-06 22:38:23 +0200 (Sun, 06 Jul 2008) | 2 lines
  
  Added pdf font handling and rendering functions with the use of Haru functions.
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  r4555 | adamblokus | 2008-07-10 00:59:05 +0200 (Thu, 10 Jul 2008) | 2 lines
  
  Added a very basic and still buggy GTK print implementation.
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  r4565 | adamblokus | 2008-07-10 14:50:16 +0200 (Thu, 10 Jul 2008) | 2 lines
  
  Added gtk printing one more time - I have forgotten to add the main file.
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  r4566 | adamblokus | 2008-07-10 14:57:02 +0200 (Thu, 10 Jul 2008) | 2 lines
  
  removed error with comment
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  r4569 | adamblokus | 2008-07-10 15:52:55 +0200 (Thu, 10 Jul 2008) | 5 lines
  
  Major style improvements - added a lot of doxygen comments, 
  followed tlsa's style guide.
  Added some more error checking, too.
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  r4575 | adamblokus | 2008-07-10 18:48:26 +0200 (Thu, 10 Jul 2008) | 2 lines
  
  Cleaned up the code.
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  r4687 | adamblokus | 2008-07-17 14:17:19 +0200 (Thu, 17 Jul 2008) | 2 lines
  
  Changed everything according to jmb's review plus some minor bug fixes to gtk_print.
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  r4688 | adamblokus | 2008-07-17 17:16:34 +0200 (Thu, 17 Jul 2008) | 2 lines
  
  Solved the netsurf.glade clash from r4421.
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  r4693 | adamblokus | 2008-07-18 18:11:51 +0200 (Fri, 18 Jul 2008) | 2 lines
  
  Fixed bug with wrong number of pages in gtk printing.
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  r4695 | adamblokus | 2008-07-18 19:59:24 +0200 (Fri, 18 Jul 2008) | 3 lines
  
  - fixed uncommented line from the previous commit
  - fixed bug with scale bigger than 1.0 (incorretly clipped page)
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  r4696 | adamblokus | 2008-07-18 23:28:00 +0200 (Fri, 18 Jul 2008) | 2 lines
  
  Fixed bug in gtk_print_font_paint (and nsfont_paint).
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  r4697 | adamblokus | 2008-07-18 23:35:38 +0200 (Fri, 18 Jul 2008) | 2 lines
  
  Bug fix in nsfont_paint.
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  r4711 | adamblokus | 2008-07-19 22:44:15 +0200 (Sat, 19 Jul 2008) | 2 lines
  
  Added gtk_selection files.
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  r4712 | adamblokus | 2008-07-20 11:15:06 +0200 (Sun, 20 Jul 2008) | 2 lines
  
  Addam missing glade files.
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  r4713 | joty | 2008-07-20 17:13:10 +0200 (Sun, 20 Jul 2008) | 1 line
  
  Follow change r4517 for RISC OS and BeOS platforms : Added pdf font handling and rendering functions with the use of Haru functions.
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  r4714 | joty | 2008-07-20 18:19:50 +0200 (Sun, 20 Jul 2008) | 1 line
  
  Declare haru_nsfont iso define an instance for each C source including the font_haru.h header.  This fixes breakage of PDF export on RISC OS.
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  r4724 | adamblokus | 2008-07-23 03:30:08 +0200 (Wed, 23 Jul 2008) | 6 lines
  
  Applied changes according to joty's review.
  Added checking the dimensions of a plotted image to pdf plotter.
  Commented out jpg embedding (it seems to cause some problems
  I'll bring it back when I figure out what's wrong) .
  Added back some files removed by mistake.
........


svn path=/trunk/netsurf/; revision=4741
2008-07-26 16:01:59 +00:00

320 lines
8.7 KiB
C

/*
* Copyright 2004 James Bursa <bursa@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
* Generic bitmap handling (GDK / GTK+ implementation).
*
* This implements the interface given by desktop/bitmap.h using GdkPixbufs.
*/
#include <assert.h>
#include <stdbool.h>
#include <string.h>
#include <gdk/gdk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "content/content.h"
#include "gtk/gtk_bitmap.h"
#include "gtk/gtk_scaffolding.h"
#include "image/bitmap.h"
#include "utils/log.h"
struct bitmap {
GdkPixbuf *primary;
GdkPixbuf *pretile_x;
GdkPixbuf *pretile_y;
GdkPixbuf *pretile_xy;
};
#define MIN_PRETILE_WIDTH 256
#define MIN_PRETILE_HEIGHT 256
/**
* Create a bitmap.
*
* \param width width of image in pixels
* \param height width of image in pixels
* \param state a flag word indicating the initial state
* \return an opaque struct bitmap, or NULL on memory exhaustion
*/
struct bitmap *bitmap_create(int width, int height, unsigned int state)
{
struct bitmap *bmp = malloc(sizeof(struct bitmap));
bmp->primary = gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8,
width, height);
/* fill the pixbuf in with 100% transparent black, as the memory
* won't have been cleared.
*/
gdk_pixbuf_fill(bmp->primary, 0);
bmp->pretile_x = bmp->pretile_y = bmp->pretile_xy = NULL;
return bmp;
}
/**
* Sets whether a bitmap should be plotted opaque
*
* \param bitmap a bitmap, as returned by bitmap_create()
* \param opaque whether the bitmap should be plotted opaque
*/
void bitmap_set_opaque(struct bitmap *bitmap, bool opaque)
{
assert(bitmap);
/* todo: set bitmap as opaque */
}
/**
* Tests whether a bitmap has an opaque alpha channel
*
* \param bitmap a bitmap, as returned by bitmap_create()
* \return whether the bitmap is opaque
*/
bool bitmap_test_opaque(struct bitmap *bitmap)
{
assert(bitmap);
/* todo: test if bitmap as opaque */
return false;
}
/**
* Gets whether a bitmap should be plotted opaque
*
* \param bitmap a bitmap, as returned by bitmap_create()
*/
bool bitmap_get_opaque(struct bitmap *bitmap)
{
assert(bitmap);
/* todo: get whether bitmap is opaque */
return false;
}
/**
* Return a pointer to the pixel data in a bitmap.
*
* \param bitmap a bitmap, as returned by bitmap_create()
* \return pointer to the pixel buffer
*
* The pixel data is packed as BITMAP_FORMAT, possibly with padding at the end
* of rows. The width of a row in bytes is given by bitmap_get_rowstride().
*/
char *bitmap_get_buffer(struct bitmap *bitmap)
{
assert(bitmap);
return (char *)gdk_pixbuf_get_pixels(bitmap->primary);
}
/**
* Find the width of a pixel row in bytes.
*
* \param bitmap a bitmap, as returned by bitmap_create()
* \return width of a pixel row in the bitmap
*/
size_t bitmap_get_rowstride(struct bitmap *bitmap)
{
assert(bitmap);
return gdk_pixbuf_get_rowstride(bitmap->primary);
}
static void
gtk_bitmap_free_pretiles(struct bitmap *bitmap)
{
#define FREE_TILE(XY) if (bitmap->pretile_##XY) g_object_unref(bitmap->pretile_##XY); bitmap->pretile_##XY = NULL
FREE_TILE(x);
FREE_TILE(y);
FREE_TILE(xy);
#undef FREE_TILE
}
/**
* Free a bitmap.
*
* \param bitmap a bitmap, as returned by bitmap_create()
*/
void bitmap_destroy(struct bitmap *bitmap)
{
assert(bitmap);
gtk_bitmap_free_pretiles(bitmap);
g_object_unref(bitmap->primary);
free(bitmap);
}
/**
* Save a bitmap in the platform's native format.
*
* \param bitmap a bitmap, as returned by bitmap_create()
* \param path pathname for file
* \param flags modify the behaviour of the save
* \return true on success, false on error and error reported
*/
bool bitmap_save(struct bitmap *bitmap, const char *path, unsigned flags)
{
GError *err = NULL;
gdk_pixbuf_save(bitmap->primary, path, "png", &err, NULL);
if (err == NULL)
/* TODO: report an error here */
return false;
return true;
}
/**
* The bitmap image has changed, so flush any persistant cache.
*
* \param bitmap a bitmap, as returned by bitmap_create()
*/
void bitmap_modified(struct bitmap *bitmap) {
gtk_bitmap_free_pretiles(bitmap);
}
/**
* The bitmap image can be suspended.
*
* \param bitmap a bitmap, as returned by bitmap_create()
* \param private_word a private word to be returned later
* \param suspend the function to be called upon suspension
* \param resume the function to be called when resuming
*/
void bitmap_set_suspendable(struct bitmap *bitmap, void *private_word,
void (*invalidate)(struct bitmap *bitmap, void *private_word)) {
}
int bitmap_get_width(struct bitmap *bitmap){
return gdk_pixbuf_get_width(bitmap->primary);
}
int bitmap_get_height(struct bitmap *bitmap){
return gdk_pixbuf_get_height(bitmap->primary);
}
static GdkPixbuf *
gtk_bitmap_generate_pretile(GdkPixbuf *primary, int repeat_x, int repeat_y)
{
int width = gdk_pixbuf_get_width(primary);
int height = gdk_pixbuf_get_height(primary);
size_t primary_stride = gdk_pixbuf_get_rowstride(primary);
GdkPixbuf *result = gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8,
width * repeat_x, height * repeat_y);
char *target_buffer = (char *)gdk_pixbuf_get_pixels(result);
int x,y,row;
/* This algorithm won't work if the strides are not multiples */
assert((size_t)gdk_pixbuf_get_rowstride(result) ==
(primary_stride * repeat_x));
if (repeat_x == 1 && repeat_y == 1) {
g_object_ref(primary);
g_object_unref(result);
return primary;
}
for (y = 0; y < repeat_y; ++y) {
char *primary_buffer = (char *)gdk_pixbuf_get_pixels(primary);
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.
*
* \param bitmap a bitmap, as returned by bitmap_create()
*/
GdkPixbuf *
gtk_bitmap_get_primary(struct bitmap* bitmap)
{
return bitmap->primary;
}
/**
* The X-pretiled image associated with this bitmap object.
*
* \param bitmap a bitmap, as returned by bitmap_create()
*/
GdkPixbuf *
gtk_bitmap_get_pretile_x(struct bitmap* bitmap)
{
if (!bitmap->pretile_x) {
int width = gdk_pixbuf_get_width(bitmap->primary);
int xmult = (MIN_PRETILE_WIDTH + width - 1)/width;
LOG(("Pretiling %p for X*%d", bitmap, xmult));
bitmap->pretile_x = gtk_bitmap_generate_pretile(bitmap->primary, xmult, 1);
}
return bitmap->pretile_x;
}
/**
* The Y-pretiled image associated with this bitmap object.
*
* \param bitmap a bitmap, as returned by bitmap_create()
*/
GdkPixbuf *
gtk_bitmap_get_pretile_y(struct bitmap* bitmap)
{
if (!bitmap->pretile_y) {
int height = gdk_pixbuf_get_height(bitmap->primary);
int ymult = (MIN_PRETILE_HEIGHT + height - 1)/height;
LOG(("Pretiling %p for Y*%d", bitmap, ymult));
bitmap->pretile_y = gtk_bitmap_generate_pretile(bitmap->primary, 1, ymult);
}
return bitmap->pretile_y;
}
/**
* The XY-pretiled image associated with this bitmap object.
*
* \param bitmap a bitmap, as returned by bitmap_create()
*/
GdkPixbuf *
gtk_bitmap_get_pretile_xy(struct bitmap* bitmap)
{
if (!bitmap->pretile_xy) {
int width = gdk_pixbuf_get_width(bitmap->primary);
int height = gdk_pixbuf_get_height(bitmap->primary);
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 = gtk_bitmap_generate_pretile(bitmap->primary, xmult, ymult);
}
return bitmap->pretile_xy;
}