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https://github.com/netsurf-browser/netsurf
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Include: Bitmap: Add API for setting core bitmap format.
This commit is contained in:
Michael Drake
parent
6011da798f
commit
e9d1a1fa9d
@ -12,7 +12,7 @@ desktop/version.c: testament $(OBJROOT)/testament.h
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# S_BROWSER are sources related to full browsers but are common
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# between RISC OS, GTK, BeOS and AmigaOS builds
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S_BROWSER := browser.c browser_window.c browser_history.c \
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S_BROWSER := bitmap.c browser.c browser_window.c browser_history.c \
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download.c frames.c netsurf.c cw_helper.c \
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save_complete.c save_text.c selection.c textinput.c gui_factory.c \
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save_pdf.c font_haru.c
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46
desktop/bitmap.c
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46
desktop/bitmap.c
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@ -0,0 +1,46 @@
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/*
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* Copyright 2022 Michael Drake <tlsa@netsurf-browser.org>
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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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/** \file
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* Internal core bitmap interface.
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*/
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#include <stddef.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "utils/log.h"
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#include "utils/errors.h"
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#include "desktop/bitmap.h"
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#include "desktop/gui_internal.h"
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/** The client bitmap format. */
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bitmap_fmt_t bitmap_fmt;
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/** The client bitmap colour channel layout. */
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struct bitmap_colour_layout bitmap_layout;
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/* Exported function, documented in include/netsurf/bitmap.h */
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void bitmap_set_format(const bitmap_fmt_t *bitmap_format)
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{
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bitmap_fmt = *bitmap_format;
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bitmap_fmt.layout = bitmap_sanitise_bitmap_layout(bitmap_fmt.layout);
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bitmap_layout = bitmap__get_colour_layout(&bitmap_fmt);
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}
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124
desktop/bitmap.h
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124
desktop/bitmap.h
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@ -0,0 +1,124 @@
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/*
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* Copyright 2022 Michael Drake <tlsa@nesturf-browser.org>
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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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/** \file
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* Internal core bitmap interface.
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*/
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#ifndef _NETSURF_DESKTOP_BITMAP_H_
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#define _NETSURF_DESKTOP_BITMAP_H_
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#include <nsutils/endian.h>
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#include "netsurf/bitmap.h"
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/** The client bitmap format. */
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extern bitmap_fmt_t bitmap_fmt;
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/** Pixel format: colour component order. */
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struct bitmap_colour_layout {
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uint8_t r; /**< Byte offset within pixel to red component. */
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uint8_t g; /**< Byte offset within pixel to green component. */
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uint8_t b; /**< Byte offset within pixel to blue component. */
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uint8_t a; /**< Byte offset within pixel to alpha component. */
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};
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/**
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* Get the colour layout for the given bitmap format.
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*
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* \param[in] fmt Pixel format to get channel layout for,
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* \return channel layout structure.
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*/
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static inline struct bitmap_colour_layout bitmap__get_colour_layout(
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const bitmap_fmt_t *fmt)
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{
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switch (fmt->layout) {
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default:
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/* Fall through. */
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case BITMAP_LAYOUT_R8G8B8A8:
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return (struct bitmap_colour_layout) {
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.r = 0,
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.g = 1,
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.b = 2,
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.a = 3,
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};
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case BITMAP_LAYOUT_B8G8R8A8:
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return (struct bitmap_colour_layout) {
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.b = 0,
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.g = 1,
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.r = 2,
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.a = 3,
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};
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case BITMAP_LAYOUT_A8R8G8B8:
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return (struct bitmap_colour_layout) {
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.a = 0,
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.r = 1,
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.g = 2,
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.b = 3,
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};
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case BITMAP_LAYOUT_A8B8G8R8:
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return (struct bitmap_colour_layout) {
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.a = 0,
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.b = 1,
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.g = 2,
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.r = 3,
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};
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}
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}
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/**
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* Sanitise bitmap pixel component layout.
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*
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* Map endian-dependant layouts to byte-wise layout for the host.
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*
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* \param[in] layout Layout to convert.
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* \return sanitised layout.
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*/
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static inline enum bitmap_layout bitmap_sanitise_bitmap_layout(
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enum bitmap_layout layout)
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{
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bool le = endian_host_is_le();
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switch (layout) {
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case BITMAP_LAYOUT_RGBA8888:
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layout = (le) ? BITMAP_LAYOUT_A8B8G8R8
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: BITMAP_LAYOUT_R8G8B8A8;
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break;
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case BITMAP_LAYOUT_BGRA8888:
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layout = (le) ? BITMAP_LAYOUT_A8R8G8B8
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: BITMAP_LAYOUT_B8G8R8A8;
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break;
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case BITMAP_LAYOUT_ARGB8888:
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layout = (le) ? BITMAP_LAYOUT_B8G8R8A8
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: BITMAP_LAYOUT_A8R8G8B8;
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break;
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case BITMAP_LAYOUT_ABGR8888:
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layout = (le) ? BITMAP_LAYOUT_R8G8B8A8
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: BITMAP_LAYOUT_A8B8G8R8;
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break;
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default:
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break;
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}
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return layout;
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}
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#endif
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@ -61,10 +61,77 @@ enum gui_bitmap_flags {
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BITMAP_CLEAR = (1 << 1), /**< memory should be wiped to 0 */
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};
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/**
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* NetSurf bitmap pixel layout.
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*
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* All pixels are 32 bits per pixel (bpp). The different layouts allow control
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* over the ordering of colour channels. All colour channels are 8 bits wide.
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*/
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enum bitmap_layout {
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/** Bite-wise RGBA: Byte order: 0xRR, 0xGG, 0xBB, 0xAA. */
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BITMAP_LAYOUT_R8G8B8A8,
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/** Bite-wise BGRA: Byte order: 0xBB, 0xGG, 0xRR, 0xAA. */
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BITMAP_LAYOUT_B8G8R8A8,
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/** Bite-wise ARGB: Byte order: 0xAA, 0xRR, 0xGG, 0xBB. */
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BITMAP_LAYOUT_A8R8G8B8,
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/** Bite-wise ABGR: Byte order: 0xAA, 0xBB, 0xGG, 0xRR. */
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BITMAP_LAYOUT_A8B8G8R8,
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/**
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* 32-bit RGBA (0xRRGGBBAA).
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*
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* * On little endian host, same as \ref BITMAP_LAYOUT_A8B8G8R8.
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* * On big endian host, same as \ref BITMAP_LAYOUT_R8G8B8A8.
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*/
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BITMAP_LAYOUT_RGBA8888,
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/**
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* 32-bit BGRA (0xBBGGRRAA).
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*
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* * On little endian host, same as \ref BITMAP_LAYOUT_A8R8G8B8.
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* * On big endian host, same as \ref BITMAP_LAYOUT_B8G8R8A8.
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*/
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BITMAP_LAYOUT_BGRA8888,
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/**
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* 32-bit ARGB (0xAARRGGBB).
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*
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* * On little endian host, same as \ref BITMAP_LAYOUT_B8G8R8A8.
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* * On big endian host, same as \ref BITMAP_LAYOUT_A8R8G8B8.
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*/
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BITMAP_LAYOUT_ARGB8888,
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/**
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* 32-bit BGRA (0xAABBGGRR).
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*
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* * On little endian host, same as \ref BITMAP_LAYOUT_R8G8B8A8.
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* * On big endian host, same as \ref BITMAP_LAYOUT_A8B8G8R8.
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*/
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BITMAP_LAYOUT_ABGR8888,
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};
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/** Bitmap format specifier. */
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typedef struct bitmap_fmt {
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enum bitmap_layout layout; /** Colour component layout. */
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} bitmap_fmt_t;
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struct content;
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struct bitmap;
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struct hlcache_handle;
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/**
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* Set client bitmap format.
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*
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* Set this to ensure that the bitmaps decoded by the core are in the
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* correct format for the front end.
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*
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* \param[in] bitmap_format The bitmap format specification to set.
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*/
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void bitmap_set_format(const bitmap_fmt_t *bitmap_format);
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/**
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* Bitmap operations.
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*/
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