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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qdrawhelper_arm_simd_p.h"
#include <private/qpaintengine_raster_p.h>
#include <private/qblendfunctions_p.h>
#ifdef QT_HAVE_ARM_SIMD
#if defined(Q_OS_SYMBIAN)
#if !defined(__SWITCH_TO_ARM)
#ifdef __MARM_THUMB__
#ifndef __ARMCC__
#define __SWITCH_TO_ARM asm("push {r0} ");\
asm("add r0, pc, #4 ");\
asm("bx r0 ");\
asm("nop ");\
asm(".align 2 ");\
asm(".code 32 ");\
asm("ldr r0, [sp], #4 ")
#define __END_ARM asm(".code 16 ")
#else
#define __SWITCH_TO_ARM asm(".code 32 ");
#define __END_ARM
#endif // __ARMCC__
#else
#define __SWITCH_TO_ARM
#define __END_ARM
#endif //__MARM_THUMB__
#endif
#endif
#if defined(Q_OS_SYMBIAN) && defined(Q_CC_RVCT)
__asm void qt_blend_argb32_on_argb32_arm_simd(uchar *destPixels, int dbpl,
const uchar *srcPixels, int sbpl,
int w, int h,
int const_alpha)
{
#ifndef __ARMCC__
__SWITCH_TO_ARM;
#else
CODE32
#endif // __ARMCC__
stmfd sp!, {r4-r12, r14}
// read arguments off the stack
add r8, sp, #10 * 4
ldmia r8, {r4-r6}
// adjust dbpl and sbpl
mov r14, #4
mul r14, r4, r14
sub r1, r1, r14
sub r3, r3, r14
// load 0xFF00FF00 to r12
mov r12, #0xFF000000
add r12, r12, #0xFF00
// load 0x800080 to r14
mov r14, #0x800000
add r14, r14, #0x80
/*
Registers:
r0 dst
r1 dbpl
r2 src
r3 sbpl
r4 w
r5 h
r6 const_alpha
r12 0xFF0000
r14 0x800080
*/
cmp r6, #256 //test if we have fully opaque constant alpha value
bne argb32constalpha // branch if not
argb32_next_row
mov r7, r4
argb32_next_pixel
ldr r8, [r2], #4 // load src pixel
// Negate r8 and extract src alpha
mvn r11, r8 // bitwise not
uxtb r11, r11, ror #24
cmp r11, #0 // test for full src opacity (negated)
beq argb32_no_blend
cmp r11, #255 // test for full src transparency (negated)
addeq r0, #4
beq argb32_nop
ldr r9, [r0] // load dst pixel
// blend
uxtb16 r10, r9
uxtb16 r6, r9, ror #8
mla r10, r11, r10, r14
mla r9, r6, r11, r14
uxtab16 r10, r10, r10, ror #8
uxtab16 r9, r9, r9, ror #8
and r9, r9, r12
uxtab16 r10, r9, r10, ror #8
uqadd8 r8, r10, r8
argb32_no_blend
str r8, [r0], #4
argb32_nop
subs r7, r7, #1
bgt argb32_next_pixel
add r0, r0, r1 // dest = dest + dbpl
add r2, r2, r3 // src = src + sbpl
subs r5, r5, #1
bgt argb32_next_row
b argb32_blend_exit
argb32constalpha
cmp r6, #0
beq argb32_blend_exit
; const_alpha = (const_alpha * 255) >> 8;
mov r11, #255
mul r6, r6, r11
mov r11, r6, lsr #8
argb32constalpha_next_row
mov r7, r4
argb32constalpha_next_pixel
ldr r9, [r2], #4 // load src pixel
// blend
uxtb16 r10, r9
uxtb16 r6, r9, ror #8
mla r10, r11, r10, r14
mla r9, r6, r11, r14
uxtab16 r10, r10, r10, ror #8
uxtab16 r9, r9, r9, ror #8
and r9, r9, r12
uxtab16 r8, r9, r10, ror #8
ldr r9, [r0] // load dst pixel
// blend
uxtb16 r10, r9
uxtb16 r6, r9, ror #8
// Negate r8 and extract src alpha
mvn r9, r8 // bitwise not
uxtb r9, r9, ror #24
mla r10, r9, r10, r14
mla r9, r6, r9, r14
uxtab16 r10, r10, r10, ror #8
uxtab16 r9, r9, r9, ror #8
and r9, r9, r12
uxtab16 r10, r9, r10, ror #8
uqadd8 r8, r10, r8
str r8, [r0], #4
subs r7, r7, #1
bgt argb32constalpha_next_pixel
add r0, r0, r1 // dest = dest + dbpl
add r2, r2, r3 // src = src + sbpl
subs r5, r5, #1
bgt argb32constalpha_next_row
argb32_blend_exit
// Restore registers
ldmfd sp!, {r4-r12, lr}
bx lr
__END_ARM
}
void qt_blend_rgb32_on_rgb32_arm_simd(uchar *destPixels, int dbpl,
const uchar *srcPixels, int sbpl,
int w, int h,
int const_alpha)
{
if (const_alpha != 256) {
qt_blend_argb32_on_argb32_arm_simd(destPixels, dbpl, srcPixels, sbpl, w, h, const_alpha);
return;
}
const uint *src = (const uint *) srcPixels;
uint *dst = (uint *) destPixels;
if (w <= 64) {
for (int y=0; y<h; ++y) {
qt_memconvert(dst, src, w);
dst = (quint32 *)(((uchar *) dst) + dbpl);
src = (const quint32 *)(((const uchar *) src) + sbpl);
}
} else {
int len = w * 4;
for (int y=0; y<h; ++y) {
memcpy(dst, src, len);
dst = (quint32 *)(((uchar *) dst) + dbpl);
src = (const quint32 *)(((const uchar *) src) + sbpl);
}
}
}
#else // defined(Q_OS_SYMBIAN) && defined(Q_CC_RVCT)
// TODO: add GNU assembler instructions and support for other platforms.
// Default to C code for now
void qt_blend_argb32_on_argb32_arm_simd(uchar *destPixels, int dbpl,
const uchar *srcPixels, int sbpl,
int w, int h,
int const_alpha)
{
const uint *src = (const uint *) srcPixels;
uint *dst = (uint *) destPixels;
if (const_alpha == 256) {
for (int y=0; y<h; ++y) {
for (int x=0; x<w; ++x) {
uint s = src[x];
if (s >= 0xff000000)
dst[x] = s;
else if (s != 0)
dst[x] = s + BYTE_MUL(dst[x], qAlpha(~s));
}
dst = (quint32 *)(((uchar *) dst) + dbpl);
src = (const quint32 *)(((const uchar *) src) + sbpl);
}
} else if (const_alpha != 0) {
const_alpha = (const_alpha * 255) >> 8;
for (int y=0; y<h; ++y) {
for (int x=0; x<w; ++x) {
uint s = BYTE_MUL(src[x], const_alpha);
dst[x] = s + BYTE_MUL(dst[x], qAlpha(~s));
}
dst = (quint32 *)(((uchar *) dst) + dbpl);
src = (const quint32 *)(((const uchar *) src) + sbpl);
}
}
}
void qt_blend_rgb32_on_rgb32_arm_simd(uchar *destPixels, int dbpl,
const uchar *srcPixels, int sbpl,
int w, int h,
int const_alpha)
{
if (const_alpha != 256) {
qt_blend_argb32_on_argb32_arm_simd(destPixels, dbpl, srcPixels, sbpl, w, h, const_alpha);
return;
}
const uint *src = (const uint *) srcPixels;
uint *dst = (uint *) destPixels;
if (w <= 64) {
for (int y=0; y<h; ++y) {
qt_memconvert(dst, src, w);
dst = (quint32 *)(((uchar *) dst) + dbpl);
src = (const quint32 *)(((const uchar *) src) + sbpl);
}
} else {
int len = w * 4;
for (int y=0; y<h; ++y) {
memcpy(dst, src, len);
dst = (quint32 *)(((uchar *) dst) + dbpl);
src = (const quint32 *)(((const uchar *) src) + sbpl);
}
}
}
#endif
#endif // QT_HAVE_ARMV_SIMD
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