[Scummvm-cvs-logs] SF.net SVN: scummvm: [27805] scummvm/trunk/backends/platform/ds/arm9/source /blitters.cpp
agent-q at users.sourceforge.net
agent-q at users.sourceforge.net
Sun Jul 1 01:42:59 CEST 2007
Revision: 27805
http://scummvm.svn.sourceforge.net/scummvm/?rev=27805&view=rev
Author: agent-q
Date: 2007-06-30 16:42:58 -0700 (Sat, 30 Jun 2007)
Log Message:
-----------
Adding mistakenly deleted file
Added Paths:
-----------
scummvm/trunk/backends/platform/ds/arm9/source/blitters.cpp
Copied: scummvm/trunk/backends/platform/ds/arm9/source/blitters.cpp (from rev 26804, scummvm/trunk/backends/platform/ds/arm9/source/blitters.cpp)
===================================================================
--- scummvm/trunk/backends/platform/ds/arm9/source/blitters.cpp (rev 0)
+++ scummvm/trunk/backends/platform/ds/arm9/source/blitters.cpp 2007-06-30 23:42:58 UTC (rev 27805)
@@ -0,0 +1,400 @@
+/* ScummVM - Scumm Interpreter
+ * Copyright (C) 2005-2006 Neil Millstone
+ * Copyright (C) 2006 The ScummVM project
+ *
+ * This program 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; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#include "stdafx.h"
+#include "blitters.h"
+#define CHARSET_MASK_TRANSPARENCY 253
+
+//#define PERFECT_5_TO_4_RESCALING
+
+namespace DS {
+
+void asmDrawStripToScreen(int height, int width, byte const* text, byte const* src, byte* dst,
+ int vsPitch, int vmScreenWidth, int textSurfacePitch) {
+
+
+ if (height <= 0) height = 1;
+ if (width < 4) return;
+
+
+ width &= ~4;
+// src = (const byte *) (((int) (src)) & (~4));
+// dst = (byte *) (((int) (dst)) & (~4));
+// text = (const byte *) (((int) (text)) & (~4));
+
+ asm ( "mov r5, %0\n" // Height
+ "yLoop:\n"
+ "mov r3, #0\n" // X pos
+
+ "xLoop:\n"
+
+ "ldr r4, [%2, r3]\n" // Load text layer word
+ "cmp r4, %5\n"
+ "bne singleByteCompare\n"
+ "ldr r4, [%3, r3]\n"
+ "str r4, [%4, r3]\n"
+ "add r3, r3, #4\n"
+ "cmp r3, %1\n" // x == width?
+ "blt xLoop\n"
+
+ "add %2, %2, %8\n" // src += vs->pitch
+ "add %3, %3, %6\n" // dst += _vm->_screenWidth
+ "add %4, %4, %7\n" // text += _textSurface.pitch
+ "sub r5, r5, #1\n" // y -= 1
+ "cmp r5, #0\n" // y == 0?
+ "bne yLoop\n"
+ "b end\n"
+
+
+ "singleByteCompare:\n"
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "ldrb r4, [%2, r3]\n" // Load text byte
+ "cmps r4, %5, lsr #24\n" // Compare with mask
+ "strneb r4, [%4, r3]\n" // Store if not equal
+ "ldreqb r4, [%3, r3]\n" // Otherwise Load src byte
+ "streqb r4, [%4, r3]\n" // Store it
+ "add r3, r3, #1\n"
+
+ "cmps r3, %1\n" // x == width?
+ "blt xLoop\n" // Repeat
+ "add %2, %2, %8\n" // src += vs->pitch
+ "add %3, %3, %6\n" // dst += _vm->_screenWidth
+ "add %4, %4, %7\n" // text += _textSurface.pitch
+ "sub r5, r5, #1\n" // y -= 1
+ "cmp r5, #0\n" // y == 0?
+ "bne yLoop\n"
+
+ "end:\n"
+ : /* no output registers */
+ : "r" (height), "r" (width), "r" (text), "r" (src), "r" (dst), "r" (CHARSET_MASK_TRANSPARENCY | (CHARSET_MASK_TRANSPARENCY << 8) | (CHARSET_MASK_TRANSPARENCY << 16) | (CHARSET_MASK_TRANSPARENCY << 24)),
+ "r" (vsPitch), "r" (vmScreenWidth), "r" (textSurfacePitch)
+ : "r5", "r3", "r4", "%2", "%3", "%4", "memory");
+}
+
+
+
+void asmCopy8Col(byte* dst, int dstPitch, const byte* src, int height) {
+ asm("ands r0, %3, #1\n"
+ "addne %3, %3, #1\n"
+ "bne roll2\n"
+
+ "yLoop2:\n"
+ "ldr r0, [%2, #0]\n"
+ "str r0, [%0, #0]\n"
+ "ldr r0, [%2, #4]\n"
+ "str r0, [%0, #4]\n"
+ "add %0, %0, %1\n"
+ "add %2, %2, %1\n"
+ "roll2:\n"
+ "ldr r0, [%2, #0]\n"
+ "str r0, [%0, #0]\n"
+ "ldr r0, [%2, #4]\n"
+ "str r0, [%0, #4]\n"
+ "add %0, %0, %1\n"
+ "add %2, %2, %1\n"
+ "subs %3, %3, #2\n"
+ "bne yLoop2\n"
+
+ : /* no output registers */
+ : "r" (dst), "r" (dstPitch), "r" (src), "r" (height)
+ : "r0", "%0", "%2", "%3");
+}
+
+static bool isDivBy5Ready = false;
+static u32 DIV_BY_5[160];
+
+void ComputeDivBy5TableIFN()
+{
+ if (isDivBy5Ready)
+ return;
+ isDivBy5Ready = true;
+
+ for(int i=0; i<160; ++i)
+ {
+ DIV_BY_5[i] = (2*i+5)/10;
+ }
+}
+
+#ifdef PERFECT_5_TO_4_RESCALING
+static inline void RescaleBlock_5x1555_To_4x1555( u16 s0, u16 s1, u16 s2, u16 s3, u16 s4,
+ u16* dest)
+{
+ u32 bs0 = s0 & 0x1F;
+ u32 bs1 = s1 & 0x1F;
+ u32 bs2 = s2 & 0x1F;
+ u32 bs3 = s3 & 0x1F;
+ u32 bs4 = s4 & 0x1F;
+
+#if 0
+ u32 gs0 = (s0 >> 5) & 0x1F;
+ u32 gs1 = (s1 >> 5) & 0x1F;
+ u32 gs2 = (s2 >> 5) & 0x1F;
+ u32 gs3 = (s3 >> 5) & 0x1F;
+ u32 gs4 = (s4 >> 5) & 0x1F;
+
+ u32 rs0 = (s0 >> 10) & 0x1F;
+ u32 rs1 = (s1 >> 10) & 0x1F;
+ u32 rs2 = (s2 >> 10) & 0x1F;
+ u32 rs3 = (s3 >> 10) & 0x1F;
+ u32 rs4 = (s4 >> 10) & 0x1F;
+#else
+ // The compiler absolutely wants to use 0x1F as an immediate, which makes it unable to fold the shift during the and
+ u32 mask = 0x1F;
+ u32 gs0, gs1, gs2, gs3, gs4;
+ asm("and %0, %2, %1, lsr #5" : "=r"(gs0) : "r"(s0), "r"(mask) : );
+ asm("and %0, %2, %1, lsr #5" : "=r"(gs1) : "r"(s1), "r"(mask) : );
+ asm("and %0, %2, %1, lsr #5" : "=r"(gs2) : "r"(s2), "r"(mask) : );
+ asm("and %0, %2, %1, lsr #5" : "=r"(gs3) : "r"(s3), "r"(mask) : );
+ asm("and %0, %2, %1, lsr #5" : "=r"(gs4) : "r"(s4), "r"(mask) : );
+ u32 rs0, rs1, rs2, rs3, rs4;
+ asm("and %0, %2, %1, lsr #10" : "=r"(rs0) : "r"(s0), "r"(mask) : );
+ asm("and %0, %2, %1, lsr #10" : "=r"(rs1) : "r"(s1), "r"(mask) : );
+ asm("and %0, %2, %1, lsr #10" : "=r"(rs2) : "r"(s2), "r"(mask) : );
+ asm("and %0, %2, %1, lsr #10" : "=r"(rs3) : "r"(s3), "r"(mask) : );
+ asm("and %0, %2, %1, lsr #10" : "=r"(rs4) : "r"(s4), "r"(mask) : );
+#endif
+
+ u32 rd0 = 4*rs0 + rs1;
+ u32 rd1 = 2*rs1 + rs1 + 2*rs2;
+ u32 rd2 = 2*rs2 + 2*rs3 + rs3;
+ u32 rd3 = rs3 + 4*rs4;
+
+ u32 gd0 = 4*gs0 + gs1;
+ u32 gd1 = 2*gs1 + gs1 + 2*gs2;
+ u32 gd2 = 2*gs2 + 2*gs3 + gs3;
+ u32 gd3 = gs3 + 4*gs4;
+
+ u32 bd0 = 4*bs0 + bs1;
+ u32 bd1 = 2*bs1 + bs1 + 2*bs2;
+ u32 bd2 = 2*bs2 + 2*bs3 + bs3;
+ u32 bd3 = bs3 + 4*bs4;
+
+#if 0
+ // Offsetting for correct rounding
+ rd0 = rd0*2+5; rd1 = rd1*2+5; rd2 = rd2*2+5; rd3 = rd3*2+5;
+ gd0 = gd0*2+5; gd1 = gd1*2+5; gd2 = gd2*2+5; gd3 = gd3*2+5;
+ bd0 = bd0*2+5; bd1 = bd1*2+5; bd2 = bd2*2+5; bd3 = bd3*2+5;
+
+ rd0 = (rd0 * 51) >> 9; rd1 = (rd1 * 51) >> 9; rd2 = (rd2 * 51) >> 9; rd3 = (rd3 * 51) >> 9;
+ gd0 = (gd0 * 51) >> 9; gd1 = (gd1 * 51) >> 9; gd2 = (gd2 * 51) >> 9; gd3 = (gd3 * 51) >> 9;
+ bd0 = (bd0 * 51) >> 9; bd1 = (bd1 * 51) >> 9; bd2 = (bd2 * 51) >> 9; bd3 = (bd3 * 51) >> 9;
+#else
+ rd0 = DIV_BY_5[rd0]; rd1 = DIV_BY_5[rd1]; rd2 = DIV_BY_5[rd2]; rd3 = DIV_BY_5[rd3];
+ gd0 = DIV_BY_5[gd0]; gd1 = DIV_BY_5[gd1]; gd2 = DIV_BY_5[gd2]; gd3 = DIV_BY_5[gd3];
+ bd0 = DIV_BY_5[bd0]; bd1 = DIV_BY_5[bd1]; bd2 = DIV_BY_5[bd2]; bd3 = DIV_BY_5[bd3];
+#endif
+
+ u32 d10 = 0x80008000 | (rd1 << 26) | (gd1 << 21) | (bd1 << 16) | (rd0 << 10) | (gd0 << 5) | bd0;
+ u32 d32 = 0x80008000 | (rd3 << 26) | (gd3 << 21) | (bd3 << 16) | (rd2 << 10) | (gd2 << 5) | bd2;
+
+ ((u32*)dest)[0] = d10;
+ ((u32*)dest)[1] = d32;
+}
+#else
+static inline void RescaleBlock_5x1555_To_4x1555( u16 s0, u16 s1, u16 s2, u16 s3, u16 s4,
+ u16* dest)
+{
+ u32 ar0bs0 = s0 & 0x7C1F;
+ u32 ar0bs1 = s1 & 0x7C1F;
+ u32 ar0bs2 = s2 & 0x7C1F;
+ u32 ar0bs3 = s3 & 0x7C1F;
+ u32 ar0bs4 = s4 & 0x7C1F;
+
+ u32 gs0 = s0 & 0x03E0;
+ u32 gs1 = s1 & 0x03E0;
+ u32 gs2 = s2 & 0x03E0;
+ u32 gs3 = s3 & 0x03E0;
+ u32 gs4 = s4 & 0x03E0;
+
+ u32 ar0bd0 = (3*ar0bs0 + ar0bs1) >> 2;
+ u32 ar0bd1 = ( ar0bs1 + ar0bs2) >> 1;
+ u32 ar0bd2 = ( ar0bs2 + ar0bs3) >> 1;
+ u32 ar0bd3 = ( ar0bs3 + 3*ar0bs4) >> 2;
+
+ u32 gd0 = (3*gs0 + gs1) >> 2;
+ u32 gd1 = ( gs1 + gs2) >> 1;
+ u32 gd2 = ( gs2 + gs3) >> 1;
+ u32 gd3 = ( gs3 + 3*gs4) >> 2;
+
+ u32 d0 = (ar0bd0 & 0xFC1F) | (gd0 & 0x03E0);
+ u32 d1 = (ar0bd1 & 0xFC1F) | (gd1 & 0x03E0);
+ u32 d2 = (ar0bd2 & 0xFC1F) | (gd2 & 0x03E0);
+ u32 d3 = (ar0bd3 & 0xFC1F) | (gd3 & 0x03E0);
+
+ u32 d10 = 0x80008000 | (d1 << 16) | d0;
+ u32 d32 = 0x80008000 | (d3 << 16) | d2;
+
+ ((u32*)dest)[0] = d10;
+ ((u32*)dest)[1] = d32;
+}
+#endif
+
+static inline void RescaleBlock_5x8888_To_4x1555( u32 s0, u32 s1, u32 s2, u32 s3, u32 s4,
+ u16* dest)
+{
+ u32 d0 = 4*s0 + s1;
+ u32 d1 = 2*s1 + s1 + 2*s2;
+
+ u32 bd0 = (d0 << 24) >> 24;
+ u32 bd1 = (d1 << 24) >> 24;
+ u32 gd0 = (d0 << 16) >> 24;
+ u32 gd1 = (d1 << 16) >> 24;
+ u32 rd0 = (d0 >> 16);
+ u32 rd1 = (d1 >> 16);
+
+ rd0 = DIV_BY_5[rd0]; rd1 = DIV_BY_5[rd1];
+ gd0 = DIV_BY_5[gd0]; gd1 = DIV_BY_5[gd1];
+ bd0 = DIV_BY_5[bd0]; bd1 = DIV_BY_5[bd1];
+ u32 d10 = 0x80008000 | (rd1 << 26) | (gd1 << 21) | (bd1 << 16) | (rd0 << 10) | (gd0 << 5) | bd0;
+ ((u32*)dest)[0] = d10;
+
+ u32 d2 = 2*s2 + 2*s3 + s3;
+ u32 d3 = s3 + 4*s4;
+
+ u32 bd2 = (d2 << 24) >> 24;
+ u32 bd3 = (d3 << 24) >> 24;
+ u32 gd2 = (d2 << 16) >> 24;
+ u32 gd3 = (d3 << 16) >> 24;
+ u32 rd2 = (d2 >> 16);
+ u32 rd3 = (d3 >> 16);
+
+ rd2 = DIV_BY_5[rd2]; rd3 = DIV_BY_5[rd3];
+ gd2 = DIV_BY_5[gd2]; gd3 = DIV_BY_5[gd3];
+ bd2 = DIV_BY_5[bd2]; bd3 = DIV_BY_5[bd3];
+ u32 d32 = 0x80008000 | (rd3 << 26) | (gd3 << 21) | (bd3 << 16) | (rd2 << 10) | (gd2 << 5) | bd2;
+
+ ((u32*)dest)[1] = d32;
+}
+
+// Can't work in place
+#ifdef PERFECT_5_TO_4_RESCALING
+static inline void Rescale_320xPAL8Scanline_To_256x1555Scanline(u16* dest, const u8* src, const u32* palette)
+{
+ ComputeDivBy5TableIFN();
+
+ for(size_t i=0; i<64; ++i)
+ {
+ u32 s0 = palette[src[5*i+0]];
+ u32 s1 = palette[src[5*i+1]];
+ u32 s2 = palette[src[5*i+2]];
+ u32 s3 = palette[src[5*i+3]];
+ u32 s4 = palette[src[5*i+4]];
+
+ RescaleBlock_5x8888_To_4x1555(s0, s1, s2, s3, s4, dest+4*i);
+ }
+}
+#else
+static inline void Rescale_320xPAL8Scanline_To_256x1555Scanline(u16* dest, const u8* src, const u16* palette)
+{
+ for(size_t i=0; i<64; ++i)
+ {
+ u16 s0 = palette[src[5*i+0]];
+ u16 s1 = palette[src[5*i+1]];
+ u16 s2 = palette[src[5*i+2]];
+ u16 s3 = palette[src[5*i+3]];
+ u16 s4 = palette[src[5*i+4]];
+
+ RescaleBlock_5x1555_To_4x1555(s0, s1, s2, s3, s4, dest+4*i);
+ }
+}
+#endif
+
+
+// Can work in place, because it's a contraction
+static inline void Rescale_320x1555Scanline_To_256x1555Scanline(u16* dest, const u16* src)
+{
+ ComputeDivBy5TableIFN();
+
+ for(size_t i=0; i<64; ++i)
+ {
+ u16 s0 = src[5*i+0];
+ u16 s1 = src[5*i+1];
+ u16 s2 = src[5*i+2];
+ u16 s3 = src[5*i+3];
+ u16 s4 = src[5*i+4];
+
+ RescaleBlock_5x1555_To_4x1555(s0, s1, s2, s3, s4, dest+4*i);
+ }
+}
+
+#ifdef PERFECT_5_TO_4_RESCALING
+void Rescale_320x256xPAL8_To_256x256x1555(u16* dest, const u8* src, const u16* palette, int destStride, int srcStride)
+{
+ u32 fastRam[768];
+
+ // Palette lookup -> 0_888
+ for(size_t i=0; i<256; ++i)
+ {
+ u32 col = palette[i];
+ u32 result = col & 0x0000001F;
+ result |= (col << 3) & 0x00001F00;
+ result |= (col << 6) & 0x001F0000;
+
+ fastRam[i] = result;
+ }
+
+ for(size_t i=0; i<200; ++i)
+ {
+ Rescale_320xPAL8Scanline_To_256x1555Scanline(dest + i*destStride, src + i *srcStride, fastRam);
+ }
+}
+#else
+void Rescale_320x256xPAL8_To_256x256x1555(u16* dest, const u8* src, const u16* palette, int destStride, int srcStride)
+{
+ u16 fastRam[256];
+ for(size_t i=0; i<128; ++i)
+ ((u32*)fastRam)[i] = ((const u32*)palette)[i];
+
+ for(size_t i=0; i<200; ++i)
+ {
+ Rescale_320xPAL8Scanline_To_256x1555Scanline(dest + i*destStride, src + i *srcStride, fastRam);
+ }
+}
+#endif
+
+void Rescale_320x256x1555_To_256x256x1555(u16* dest, const u16* src, int destStride, int srcStride)
+{
+ for(size_t i=0; i<200; ++i)
+ {
+ Rescale_320x1555Scanline_To_256x1555Scanline(dest + i*destStride, src + i *srcStride);
+ }
+}
+
+}
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