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-rw-r--r--frontends/framebuffer/bitmap.c352
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diff --git a/frontends/framebuffer/bitmap.c b/frontends/framebuffer/bitmap.c
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+/*
+ * Copyright 2008 Vincent Sanders <vince@simtec.co.uk>
+ *
+ * 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
+ * Framebuffer implementation of generic bitmap interface.
+ */
+
+#include <inttypes.h>
+#include <sys/types.h>
+#include <stdbool.h>
+#include <assert.h>
+#include <libnsfb.h>
+#include <libnsfb_plot.h>
+
+#include "utils/log.h"
+#include "utils/utils.h"
+#include "image/bitmap.h"
+#include "desktop/plotters.h"
+#include "content/content.h"
+
+#include "framebuffer/gui.h"
+#include "framebuffer/fbtk.h"
+#include "framebuffer/framebuffer.h"
+#include "framebuffer/bitmap.h"
+
+/**
+ * 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
+ */
+static void *bitmap_create(int width, int height, unsigned int state)
+{
+ nsfb_t *bm;
+
+ LOG("width %d, height %d, state %u", width, height, state);
+
+ bm = nsfb_new(NSFB_SURFACE_RAM);
+ if (bm == NULL) {
+ return NULL;
+ }
+
+ if ((state & BITMAP_OPAQUE) == 0) {
+ nsfb_set_geometry(bm, width, height, NSFB_FMT_ABGR8888);
+ } else {
+ nsfb_set_geometry(bm, width, height, NSFB_FMT_XBGR8888);
+ }
+
+ if (nsfb_init(bm) == -1) {
+ nsfb_free(bm);
+ return NULL;
+ }
+
+ LOG("bitmap %p", bm);
+
+ return bm;
+}
+
+
+/**
+ * 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().
+ */
+static unsigned char *bitmap_get_buffer(void *bitmap)
+{
+ nsfb_t *bm = bitmap;
+ unsigned char *bmpptr;
+
+ assert(bm != NULL);
+
+ nsfb_get_buffer(bm, &bmpptr, NULL);
+
+ return bmpptr;
+}
+
+
+/**
+ * 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
+ */
+static size_t bitmap_get_rowstride(void *bitmap)
+{
+ nsfb_t *bm = bitmap;
+ int bmpstride;
+
+ assert(bm != NULL);
+
+ nsfb_get_buffer(bm, NULL, &bmpstride);
+
+ return bmpstride;
+}
+
+
+/**
+ * Free a bitmap.
+ *
+ * \param bitmap a bitmap, as returned by bitmap_create()
+ */
+static void bitmap_destroy(void *bitmap)
+{
+ nsfb_t *bm = bitmap;
+
+ assert(bm != NULL);
+
+ nsfb_free(bm);
+}
+
+
+/**
+ * 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 flags controlling how the bitmap is saved.
+ * \return true on success, false on error and error reported
+ */
+static bool bitmap_save(void *bitmap, const char *path, unsigned flags)
+{
+ return true;
+}
+
+
+/**
+ * The bitmap image has changed, so flush any persistant cache.
+ *
+ * \param bitmap a bitmap, as returned by bitmap_create()
+ */
+static void bitmap_modified(void *bitmap) {
+}
+
+/**
+ * Sets wether a bitmap should be plotted opaque
+ *
+ * \param bitmap a bitmap, as returned by bitmap_create()
+ * \param opaque whether the bitmap should be plotted opaque
+ */
+static void bitmap_set_opaque(void *bitmap, bool opaque)
+{
+ nsfb_t *bm = bitmap;
+
+ assert(bm != NULL);
+
+ if (opaque) {
+ nsfb_set_geometry(bm, 0, 0, NSFB_FMT_XBGR8888);
+ } else {
+ nsfb_set_geometry(bm, 0, 0, NSFB_FMT_ABGR8888);
+ }
+}
+
+
+/**
+ * Tests whether a bitmap has an opaque alpha channel
+ *
+ * \param bitmap a bitmap, as returned by bitmap_create()
+ * \return whether the bitmap is opaque
+ */
+static bool bitmap_test_opaque(void *bitmap)
+{
+ int tst;
+ nsfb_t *bm = bitmap;
+ unsigned char *bmpptr;
+ int width;
+ int height;
+
+ assert(bm != NULL);
+
+ nsfb_get_buffer(bm, &bmpptr, NULL);
+
+ nsfb_get_geometry(bm, &width, &height, NULL);
+
+ tst = width * height;
+
+ while (tst-- > 0) {
+ if (bmpptr[(tst << 2) + 3] != 0xff) {
+ LOG("bitmap %p has transparency", bm);
+ return false;
+ }
+ }
+ LOG("bitmap %p is opaque", bm);
+ return true;
+}
+
+
+/**
+ * Gets weather a bitmap should be plotted opaque
+ *
+ * \param bitmap a bitmap, as returned by bitmap_create()
+ */
+bool framebuffer_bitmap_get_opaque(void *bitmap)
+{
+ nsfb_t *bm = bitmap;
+ enum nsfb_format_e format;
+
+ assert(bm != NULL);
+
+ nsfb_get_geometry(bm, NULL, NULL, &format);
+
+ if (format == NSFB_FMT_ABGR8888)
+ return false;
+
+ return true;
+}
+
+static int bitmap_get_width(void *bitmap)
+{
+ nsfb_t *bm = bitmap;
+ int width;
+
+ assert(bm != NULL);
+
+ nsfb_get_geometry(bm, &width, NULL, NULL);
+
+ return(width);
+}
+
+static int bitmap_get_height(void *bitmap)
+{
+ nsfb_t *bm = bitmap;
+ int height;
+
+ assert(bm != NULL);
+
+ nsfb_get_geometry(bm, NULL, &height, NULL);
+
+ return(height);
+}
+
+/* get bytes per pixel */
+static size_t bitmap_get_bpp(void *bitmap)
+{
+ return 4;
+}
+
+/**
+ * Render content into a bitmap.
+ *
+ * \param bitmap the bitmap to draw to
+ * \param content content structure to render
+ * \return true on success and bitmap updated else false
+ */
+static nserror
+bitmap_render(struct bitmap *bitmap,
+ struct hlcache_handle *content)
+{
+ nsfb_t *tbm = (nsfb_t *)bitmap; /* target bitmap */
+ nsfb_t *bm; /* temporary bitmap */
+ nsfb_t *current; /* current main fb */
+ int width, height; /* target bitmap width height */
+ int cwidth, cheight;/* content width /height */
+ nsfb_bbox_t loc;
+
+ struct redraw_context ctx = {
+ .interactive = false,
+ .background_images = true,
+ .plot = &fb_plotters
+ };
+
+ nsfb_get_geometry(tbm, &width, &height, NULL);
+
+ LOG("width %d, height %d", width, height);
+
+ /* Calculate size of buffer to render the content into */
+ /* We get the width from the content width, unless it exceeds 1024,
+ * in which case we use 1024. This means we never create excessively
+ * large render buffers for huge contents, which would eat memory and
+ * cripple performance. */
+ cwidth = min(content_get_width(content), 1024);
+ /* The height is set in proportion with the width, according to the
+ * aspect ratio of the required thumbnail. */
+ cheight = ((cwidth * height) + (width / 2)) / width;
+
+ /* create temporary surface */
+ bm = nsfb_new(NSFB_SURFACE_RAM);
+ if (bm == NULL) {
+ return NSERROR_NOMEM;
+ }
+
+ nsfb_set_geometry(bm, cwidth, cheight, NSFB_FMT_XBGR8888);
+
+ if (nsfb_init(bm) == -1) {
+ nsfb_free(bm);
+ return NSERROR_NOMEM;
+ }
+
+ current = framebuffer_set_surface(bm);
+
+ /* render the content into temporary surface */
+ content_scaled_redraw(content, cwidth, cheight, &ctx);
+
+ framebuffer_set_surface(current);
+
+ loc.x0 = 0;
+ loc.y0 = 0;
+ loc.x1 = width;
+ loc.y1 = height;
+
+ nsfb_plot_copy(bm, NULL, tbm, &loc);
+
+ nsfb_free(bm);
+
+ return NSERROR_OK;
+}
+
+static struct gui_bitmap_table bitmap_table = {
+ .create = bitmap_create,
+ .destroy = bitmap_destroy,
+ .set_opaque = bitmap_set_opaque,
+ .get_opaque = framebuffer_bitmap_get_opaque,
+ .test_opaque = bitmap_test_opaque,
+ .get_buffer = bitmap_get_buffer,
+ .get_rowstride = bitmap_get_rowstride,
+ .get_width = bitmap_get_width,
+ .get_height = bitmap_get_height,
+ .get_bpp = bitmap_get_bpp,
+ .save = bitmap_save,
+ .modified = bitmap_modified,
+ .render = bitmap_render,
+};
+
+struct gui_bitmap_table *framebuffer_bitmap_table = &bitmap_table;
+
+
+/*
+ * Local Variables:
+ * c-basic-offset:8
+ * End:
+ */