/* 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); } } }