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+/*
+ * Copyright 2008 Fran├žois 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
+ * Generic bitmap handling (BeOS implementation).
+ *
+ * This implements the interface given by desktop/bitmap.h using BBitmap.
+ */
+
+#define __STDBOOL_H__ 1
+//#include <stdbool.h>
+#include <assert.h>
+#include <string.h>
+#include <Bitmap.h>
+#include <BitmapStream.h>
+#include <File.h>
+#include <GraphicsDefs.h>
+#include <TranslatorFormats.h>
+#include <TranslatorRoster.h>
+extern "C" {
+#include "content/content.h"
+#include "image/bitmap.h"
+#include "utils/log.h"
+}
+#include "beos/bitmap.h"
+#include "beos/gui.h"
+#include "beos/scaffolding.h"
+
+struct bitmap {
+ 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
+#define MIN_PRETILE_HEIGHT 256
+
+#warning TODO: check rgba order
+#warning TODO: add correct locking (not strictly required)
+
+
+/** Convert to BeOS RGBA32_LITTLE (strictly BGRA) from NetSurf's favoured ABGR format.
+ * Copies the converted data elsewhere. Operation is rotate left 8 bits.
+ *
+ * \param pixels Array of 32-bit values, in the form of ABGR. This will
+ * be overwritten with new data in the form of BGRA.
+ * \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.)
+ */
+static inline void nsbeos_rgba_to_bgra(void *src, void *dst, int width, 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;
+
+ 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;
+ }
+}
+
+
+/**
+ * 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
+ */
+
+void *bitmap_create(int width, int height, unsigned int state)
+{
+ CALLED();
+ 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;
+
+ 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->opaque = (state & BITMAP_OPAQUE) != 0;
+
+ return bmp;
+}
+
+
+/**
+ * Sets whether a bitmap should be plotted opaque
+ *
+ * \param vbitmap a bitmap, as returned by bitmap_create()
+ * \param opaque whether the bitmap should be plotted opaque
+ */
+void bitmap_set_opaque(void *vbitmap, bool opaque)
+{
+ struct bitmap *bitmap = (struct bitmap *)vbitmap;
+ assert(bitmap);
+ bitmap->opaque = opaque;
+}
+
+
+/**
+ * Tests whether a bitmap has an opaque alpha channel
+ *
+ * \param vbitmap a bitmap, as returned by bitmap_create()
+ * \return whether the bitmap is opaque
+ */
+bool bitmap_test_opaque(void *vbitmap)
+{
+ struct bitmap *bitmap = (struct bitmap *)vbitmap;
+ assert(bitmap);
+/* todo: test if bitmap is opaque */
+ return false;
+}
+
+
+/**
+ * Gets whether a bitmap should be plotted opaque
+ *
+ * \param vbitmap a bitmap, as returned by bitmap_create()
+ */
+bool bitmap_get_opaque(void *vbitmap)
+{
+ struct bitmap *bitmap = (struct bitmap *)vbitmap;
+ assert(bitmap);
+ return bitmap->opaque;
+}
+
+
+/**
+ * Return a pointer to the pixel data in a bitmap.
+ *
+ * \param vbitmap 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().
+ */
+
+unsigned char *bitmap_get_buffer(void *vbitmap)
+{
+ struct bitmap *bitmap = (struct bitmap *)vbitmap;
+ assert(bitmap);
+ return (unsigned char *)(bitmap->shadow->Bits());
+}
+
+
+/**
+ * Find the width of a pixel row in bytes.
+ *
+ * \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());
+}
+
+
+/**
+ * Find the bytes per pixels of a bitmap.
+ *
+ * \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;
+}
+
+
+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);
+#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);
+}
+
+
+/**
+ * Save a bitmap in the platform's native format.
+ *
+ * \param vbitmap 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(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;
+
+ if (file.InitCheck() < B_OK)
+ return false;
+
+ if (roster->Translate(&stream, NULL, NULL, &file, type) < B_OK)
+ return false;
+
+#if 0 /* GTK */
+ GError *err = NULL;
+
+ gdk_pixbuf_save(bitmap->primary, path, "png", &err, NULL);
+
+ if (err == NULL)
+ /* TODO: report an error here */
+ return false;
+
+#endif
+ return true;
+}
+
+
+/**
+ * The bitmap image has changed, so flush any persistant cache.
+ *
+ * \param vbitmap a bitmap, as returned by bitmap_create()
+ */
+void bitmap_modified(void *vbitmap) {
+ CALLED();
+ 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);
+}
+
+
+/**
+ * The bitmap image can be suspended.
+ *
+ * \param vbitmap 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(void *vbitmap, void *private_word,
+ void (*invalidate)(void *vbitmap, void *private_word)) {
+ struct bitmap *bitmap = (struct bitmap *)vbitmap;
+}
+
+int bitmap_get_width(void *vbitmap){
+ 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;
+}
+
+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);
+
+ 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);
+ }
+
+ 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.
+ *
+ * \param bitmap a bitmap, as returned by bitmap_create()
+ */
+BBitmap *
+nsbeos_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()
+ */
+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;
+
+}
+
+/**
+ * The Y-pretiled image associated with this bitmap object.
+ *
+ * \param bitmap a bitmap, as returned by bitmap_create()
+ */
+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;
+}
+
+/**
+ * The XY-pretiled image associated with this bitmap object.
+ *
+ * \param bitmap a bitmap, as returned by bitmap_create()
+ */
+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;
+}