680f63a48c
The cogl.h header is meant to be the public header for including the 1.x api used by Clutter so we should stop using that as a convenient way to include all likely prototypes and typedefs. Actually we already do a good job of listing the specific headers we depend on in each of the .c files we have so mostly this patch just strip out the redundant includes for cogl.h with a few fixups where that broke the build. Reviewed-by: Neil Roberts <neil@linux.intel.com>
585 lines
15 KiB
C
585 lines
15 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2007,2008,2009 Intel Corporation.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-private.h"
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#include "cogl-bitmap-private.h"
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#include <string.h>
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/* TO rgba */
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inline static void
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_cogl_g_to_rgba (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[0];
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dst[1] = src[0];
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dst[2] = src[0];
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dst[3] = 255;
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}
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inline static void
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_cogl_rgb_to_rgba (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[0];
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dst[1] = src[1];
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dst[2] = src[2];
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dst[3] = 255;
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}
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inline static void
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_cogl_bgr_to_rgba (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[2];
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dst[1] = src[1];
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dst[2] = src[0];
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dst[3] = 255;
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}
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inline static void
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_cogl_bgra_to_rgba (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[2];
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dst[1] = src[1];
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dst[2] = src[0];
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dst[3] = src[3];
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}
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inline static void
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_cogl_argb_to_rgba (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[1];
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dst[1] = src[2];
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dst[2] = src[3];
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dst[3] = src[0];
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}
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inline static void
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_cogl_abgr_to_rgba (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[3];
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dst[1] = src[2];
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dst[2] = src[1];
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dst[3] = src[0];
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}
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inline static void
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_cogl_rgba_to_rgba (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[0];
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dst[1] = src[1];
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dst[2] = src[2];
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dst[3] = src[3];
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}
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/* FROM rgba */
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inline static void
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_cogl_rgba_to_g (const guint8 *src, guint8 *dst)
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{
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dst[0] = (src[0] + src[1] + src[2]) / 3;
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}
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inline static void
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_cogl_rgba_to_rgb (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[0];
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dst[1] = src[1];
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dst[2] = src[2];
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}
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inline static void
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_cogl_rgba_to_bgr (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[2];
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dst[1] = src[1];
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dst[2] = src[0];
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}
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inline static void
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_cogl_rgba_to_bgra (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[2];
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dst[1] = src[1];
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dst[2] = src[0];
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dst[3] = src[3];
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}
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inline static void
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_cogl_rgba_to_argb (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[3];
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dst[1] = src[0];
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dst[2] = src[1];
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dst[3] = src[2];
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}
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inline static void
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_cogl_rgba_to_abgr (const guint8 *src, guint8 *dst)
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{
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dst[0] = src[3];
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dst[1] = src[2];
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dst[2] = src[1];
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dst[3] = src[0];
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}
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/* (Un)Premultiplication */
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inline static void
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_cogl_unpremult_alpha_0 (guint8 *dst)
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{
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dst[0] = 0;
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dst[1] = 0;
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dst[2] = 0;
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dst[3] = 0;
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}
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inline static void
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_cogl_unpremult_alpha_last (guint8 *dst)
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{
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guint8 alpha = dst[3];
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dst[0] = (dst[0] * 255) / alpha;
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dst[1] = (dst[1] * 255) / alpha;
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dst[2] = (dst[2] * 255) / alpha;
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}
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inline static void
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_cogl_unpremult_alpha_first (guint8 *dst)
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{
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guint8 alpha = dst[0];
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dst[1] = (dst[1] * 255) / alpha;
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dst[2] = (dst[2] * 255) / alpha;
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dst[3] = (dst[3] * 255) / alpha;
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}
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/* No division form of floor((c*a + 128)/255) (I first encountered
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* this in the RENDER implementation in the X server.) Being exact
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* is important for a == 255 - we want to get exactly c.
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*/
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#define MULT(d,a,t) \
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G_STMT_START { \
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t = d * a + 128; \
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d = ((t >> 8) + t) >> 8; \
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} G_STMT_END
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inline static void
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_cogl_premult_alpha_last (guint8 *dst)
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{
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guint8 alpha = dst[3];
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/* Using a separate temporary per component has given slightly better
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* code generation with GCC in the past; it shouldn't do any worse in
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* any case.
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*/
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unsigned int t1, t2, t3;
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MULT(dst[0], alpha, t1);
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MULT(dst[1], alpha, t2);
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MULT(dst[2], alpha, t3);
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}
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inline static void
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_cogl_premult_alpha_first (guint8 *dst)
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{
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guint8 alpha = dst[0];
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unsigned int t1, t2, t3;
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MULT(dst[1], alpha, t1);
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MULT(dst[2], alpha, t2);
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MULT(dst[3], alpha, t3);
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}
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#undef MULT
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/* Use the SSE optimized version to premult four pixels at once when
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it is available. The same assembler code works for x86 and x86-64
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because it doesn't refer to any non-SSE registers directly */
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#if defined(__SSE2__) && defined(__GNUC__) \
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&& (defined(__x86_64) || defined(__i386))
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#define COGL_USE_PREMULT_SSE2
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#endif
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#ifdef COGL_USE_PREMULT_SSE2
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inline static void
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_cogl_premult_alpha_last_four_pixels_sse2 (guint8 *p)
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{
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/* 8 copies of 128 used below */
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static const gint16 eight_halves[8] __attribute__ ((aligned (16))) =
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{ 128, 128, 128, 128, 128, 128, 128, 128 };
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/* Mask of the rgb components of the four pixels */
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static const gint8 just_rgb[16] __attribute__ ((aligned (16))) =
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{ 0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00,
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0xff, 0xff, 0xff, 0x00, 0xff, 0xff, 0xff, 0x00 };
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/* Each SSE register only holds two pixels because we need to work
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with 16-bit intermediate values. We still do four pixels by
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interleaving two registers in the hope that it will pipeline
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better */
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asm (/* Load eight_halves into xmm5 for later */
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"movdqa (%1), %%xmm5\n"
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/* Clear xmm3 */
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"pxor %%xmm3, %%xmm3\n"
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/* Load two pixels from p into the low half of xmm0 */
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"movlps (%0), %%xmm0\n"
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/* Load the next set of two pixels from p into the low half of xmm1 */
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"movlps 8(%0), %%xmm1\n"
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/* Unpack 8 bytes from the low quad-words in each register to 8
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16-bit values */
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"punpcklbw %%xmm3, %%xmm0\n"
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"punpcklbw %%xmm3, %%xmm1\n"
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/* Copy alpha values of the first pixel in xmm0 to all
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components of the first pixel in xmm2 */
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"pshuflw $255, %%xmm0, %%xmm2\n"
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/* same for xmm1 and xmm3 */
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"pshuflw $255, %%xmm1, %%xmm3\n"
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/* The above also copies the second pixel directly so we now
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want to replace the RGB components with copies of the alpha
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components */
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"pshufhw $255, %%xmm2, %%xmm2\n"
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"pshufhw $255, %%xmm3, %%xmm3\n"
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/* Multiply the rgb components by the alpha */
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"pmullw %%xmm2, %%xmm0\n"
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"pmullw %%xmm3, %%xmm1\n"
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/* Add 128 to each component */
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"paddw %%xmm5, %%xmm0\n"
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"paddw %%xmm5, %%xmm1\n"
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/* Copy the results to temporary registers xmm4 and xmm5 */
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"movdqa %%xmm0, %%xmm4\n"
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"movdqa %%xmm1, %%xmm5\n"
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/* Divide the results by 256 */
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"psrlw $8, %%xmm0\n"
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"psrlw $8, %%xmm1\n"
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/* Add the temporaries back in */
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"paddw %%xmm4, %%xmm0\n"
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"paddw %%xmm5, %%xmm1\n"
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/* Divide again */
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"psrlw $8, %%xmm0\n"
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"psrlw $8, %%xmm1\n"
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/* Pack the results back as bytes */
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"packuswb %%xmm1, %%xmm0\n"
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/* Load just_rgb into xmm3 for later */
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"movdqa (%2), %%xmm3\n"
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/* Reload all four pixels into xmm2 */
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"movups (%0), %%xmm2\n"
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/* Mask out the alpha from the results */
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"andps %%xmm3, %%xmm0\n"
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/* Mask out the RGB from the original four pixels */
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"andnps %%xmm2, %%xmm3\n"
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/* Combine the two to get the right alpha values */
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"orps %%xmm3, %%xmm0\n"
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/* Write to memory */
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"movdqu %%xmm0, (%0)\n"
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: /* no outputs */
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: "r" (p), "r" (eight_halves), "r" (just_rgb)
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: "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5");
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}
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#endif /* COGL_USE_PREMULT_SSE2 */
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static gboolean
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_cogl_bitmap_fallback_can_convert (CoglPixelFormat src, CoglPixelFormat dst)
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{
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if (src == dst)
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return FALSE;
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switch (src & ~COGL_PREMULT_BIT)
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{
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case COGL_PIXEL_FORMAT_G_8:
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case COGL_PIXEL_FORMAT_RGB_888:
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case COGL_PIXEL_FORMAT_BGR_888:
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case COGL_PIXEL_FORMAT_RGBA_8888:
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case COGL_PIXEL_FORMAT_BGRA_8888:
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case COGL_PIXEL_FORMAT_ARGB_8888:
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case COGL_PIXEL_FORMAT_ABGR_8888:
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return TRUE;
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default:
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return FALSE;
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}
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return TRUE;
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}
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static gboolean
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_cogl_bitmap_fallback_can_premult (CoglPixelFormat format)
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{
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switch (format & ~COGL_PREMULT_BIT)
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{
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case COGL_PIXEL_FORMAT_RGBA_8888:
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case COGL_PIXEL_FORMAT_BGRA_8888:
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case COGL_PIXEL_FORMAT_ARGB_8888:
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case COGL_PIXEL_FORMAT_ABGR_8888:
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return TRUE;
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default:
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return FALSE;
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}
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}
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CoglBitmap *
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_cogl_bitmap_fallback_convert (CoglBitmap *src_bmp,
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CoglPixelFormat dst_format)
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{
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guint8 *src_data;
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guint8 *dst_data;
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guint8 *src;
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guint8 *dst;
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int src_bpp;
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int dst_bpp;
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int src_rowstride;
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int dst_rowstride;
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int x,y;
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guint8 temp_rgba[4] = {0,0,0,0};
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int width, height;
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CoglPixelFormat src_format;
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src_format = _cogl_bitmap_get_format (src_bmp);
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src_rowstride = _cogl_bitmap_get_rowstride (src_bmp);
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width = _cogl_bitmap_get_width (src_bmp);
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height = _cogl_bitmap_get_height (src_bmp);
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/* Make sure conversion supported */
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if (!_cogl_bitmap_fallback_can_convert (src_format, dst_format))
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return NULL;
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src_data = _cogl_bitmap_map (src_bmp, COGL_BUFFER_ACCESS_READ, 0);
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if (src_data == NULL)
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return NULL;
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src_bpp = _cogl_pixel_format_get_bytes_per_pixel (src_format);
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dst_bpp = _cogl_pixel_format_get_bytes_per_pixel (dst_format);
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/* Initialize destination bitmap */
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dst_rowstride = sizeof(guint8) * dst_bpp * width;
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/* Copy the premult bit if the new format has an alpha channel */
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if ((dst_format & COGL_A_BIT))
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dst_format = ((src_format & COGL_PREMULT_BIT) |
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(dst_format & ~COGL_PREMULT_BIT));
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/* Allocate a new buffer to hold converted data */
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dst_data = g_malloc (height * dst_rowstride);
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/* FIXME: Optimize */
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for (y = 0; y < height; y++)
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{
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src = src_data + y * src_rowstride;
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dst = dst_data + y * dst_rowstride;
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for (x = 0; x < width; x++)
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{
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/* FIXME: Would be nice to at least remove this inner
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* branching, but not sure it can be done without
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* rewriting of the whole loop */
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switch (src_format & ~COGL_PREMULT_BIT)
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{
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case COGL_PIXEL_FORMAT_G_8:
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_cogl_g_to_rgba (src, temp_rgba); break;
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case COGL_PIXEL_FORMAT_RGB_888:
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_cogl_rgb_to_rgba (src, temp_rgba); break;
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case COGL_PIXEL_FORMAT_BGR_888:
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_cogl_bgr_to_rgba (src, temp_rgba); break;
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case COGL_PIXEL_FORMAT_RGBA_8888:
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_cogl_rgba_to_rgba (src, temp_rgba); break;
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case COGL_PIXEL_FORMAT_BGRA_8888:
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_cogl_bgra_to_rgba (src, temp_rgba); break;
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case COGL_PIXEL_FORMAT_ARGB_8888:
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_cogl_argb_to_rgba (src, temp_rgba); break;
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case COGL_PIXEL_FORMAT_ABGR_8888:
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_cogl_abgr_to_rgba (src, temp_rgba); break;
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default:
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break;
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}
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switch (dst_format & ~COGL_PREMULT_BIT)
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{
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case COGL_PIXEL_FORMAT_G_8:
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_cogl_rgba_to_g (temp_rgba, dst); break;
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case COGL_PIXEL_FORMAT_RGB_888:
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_cogl_rgba_to_rgb (temp_rgba, dst); break;
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case COGL_PIXEL_FORMAT_BGR_888:
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_cogl_rgba_to_bgr (temp_rgba, dst); break;
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case COGL_PIXEL_FORMAT_RGBA_8888:
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_cogl_rgba_to_rgba (temp_rgba, dst); break;
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case COGL_PIXEL_FORMAT_BGRA_8888:
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_cogl_rgba_to_bgra (temp_rgba, dst); break;
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case COGL_PIXEL_FORMAT_ARGB_8888:
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_cogl_rgba_to_argb (temp_rgba, dst); break;
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case COGL_PIXEL_FORMAT_ABGR_8888:
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_cogl_rgba_to_abgr (temp_rgba, dst); break;
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default:
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break;
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}
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src += src_bpp;
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dst += dst_bpp;
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}
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}
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_cogl_bitmap_unmap (src_bmp);
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return _cogl_bitmap_new_from_data (dst_data,
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dst_format,
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width, height, dst_rowstride,
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(CoglBitmapDestroyNotify) g_free,
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NULL);
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}
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gboolean
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_cogl_bitmap_fallback_unpremult (CoglBitmap *bmp)
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{
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guint8 *p, *data;
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int x,y;
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CoglPixelFormat format;
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int width, height;
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int rowstride;
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format = _cogl_bitmap_get_format (bmp);
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width = _cogl_bitmap_get_width (bmp);
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height = _cogl_bitmap_get_height (bmp);
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rowstride = _cogl_bitmap_get_rowstride (bmp);
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/* If we can premult that implies we can un-premult too... */
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if (!_cogl_bitmap_fallback_can_premult (format))
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return FALSE;
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if ((data = _cogl_bitmap_map (bmp,
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COGL_BUFFER_ACCESS_READ |
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COGL_BUFFER_ACCESS_WRITE,
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0)) == NULL)
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return FALSE;
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for (y = 0; y < height; y++)
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{
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p = (guint8*) data + y * rowstride;
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if (format & COGL_AFIRST_BIT)
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{
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for (x = 0; x < width; x++)
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{
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if (p[0] == 0)
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_cogl_unpremult_alpha_0 (p);
|
|
else
|
|
_cogl_unpremult_alpha_first (p);
|
|
p += 4;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (x = 0; x < width; x++)
|
|
{
|
|
if (p[3] == 0)
|
|
_cogl_unpremult_alpha_0 (p);
|
|
else
|
|
_cogl_unpremult_alpha_last (p);
|
|
p += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
_cogl_bitmap_unmap (bmp);
|
|
|
|
_cogl_bitmap_set_format (bmp, format & ~COGL_PREMULT_BIT);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
gboolean
|
|
_cogl_bitmap_fallback_premult (CoglBitmap *bmp)
|
|
{
|
|
guint8 *p, *data;
|
|
int x,y;
|
|
CoglPixelFormat format;
|
|
int width, height;
|
|
int rowstride;
|
|
|
|
format = _cogl_bitmap_get_format (bmp);
|
|
width = _cogl_bitmap_get_width (bmp);
|
|
height = _cogl_bitmap_get_height (bmp);
|
|
rowstride = _cogl_bitmap_get_rowstride (bmp);
|
|
|
|
/* Make sure format supported for un-premultiplication */
|
|
if (!_cogl_bitmap_fallback_can_premult (format))
|
|
return FALSE;
|
|
|
|
if ((data = _cogl_bitmap_map (bmp,
|
|
COGL_BUFFER_ACCESS_READ |
|
|
COGL_BUFFER_ACCESS_WRITE,
|
|
0)) == NULL)
|
|
return FALSE;
|
|
|
|
for (y = 0; y < height; y++)
|
|
{
|
|
p = (guint8*) data + y * rowstride;
|
|
|
|
if (format & COGL_AFIRST_BIT)
|
|
{
|
|
for (x = 0; x < width; x++)
|
|
{
|
|
_cogl_premult_alpha_first (p);
|
|
p += 4;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
x = width;
|
|
|
|
#ifdef COGL_USE_PREMULT_SSE2
|
|
|
|
/* Process 4 pixels at a time */
|
|
while (x >= 4)
|
|
{
|
|
_cogl_premult_alpha_last_four_pixels_sse2 (p);
|
|
p += 4 * 4;
|
|
x -= 4;
|
|
}
|
|
|
|
/* If there are any pixels left we will fall through and
|
|
handle them below */
|
|
|
|
#endif /* COGL_USE_PREMULT_SSE2 */
|
|
|
|
while (x-- > 0)
|
|
{
|
|
_cogl_premult_alpha_last (p);
|
|
p += 4;
|
|
}
|
|
}
|
|
}
|
|
|
|
_cogl_bitmap_unmap (bmp);
|
|
|
|
_cogl_bitmap_set_format (bmp, format | COGL_PREMULT_BIT);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
CoglBitmap *
|
|
_cogl_bitmap_fallback_from_file (const char *filename)
|
|
{
|
|
/* FIXME: use jpeglib, libpng, etc. manually maybe */
|
|
return FALSE;
|
|
}
|