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https://github.com/reactos/reactos.git
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66 lines
2.2 KiB
ArmAsm
66 lines
2.2 KiB
ArmAsm
/*
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* PROJECT: Win32 subsystem
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* LICENSE: See COPYING in the top level directory
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* FILE: subsystems/win32/win32k/dib/i386/dib32bpp_colorfill.c
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* PURPOSE: ASM optimised 32bpp ColorFill
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* PROGRAMMERS: Magnus Olsen
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* Timo Kreuzer (timo.kreuzer@reactos.org)
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*/
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.intel_syntax noprefix
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/*
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* BOOLEAN
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* _cdecl
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* DIB_32BPP_ColorFill(SURFOBJ* pso, RECTL* prcl, ULONG iColor);
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*/
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.globl _DIB_32BPP_ColorFill
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_DIB_32BPP_ColorFill:
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push ebp
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mov ebp, esp
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push ebx
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push esi
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push edi
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sub esp, 4 /* Space for lDelta */
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mov edx, [ebp+12] /* edx = prcl */
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mov ecx, [ebp+8] /* ecx = pso */
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mov ebx, [ecx+0x24] /* ebx = pso->lDelta; */
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mov [esp], ebx /* lDelta = pso->lDelta; */
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mov edi, [edx+4] /* edi = prcl->top; */
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mov eax, edi /* eax = prcl->top; */
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imul eax, ebx /* eax = prcl->top * pso->lDelta; */
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add eax, [ecx+0x20] /* eax += pso->pvScan0; */
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mov ebx, [edx] /* ebx = prcl->left; */
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lea esi, [eax+ebx*4] /* esi = pvLine0 = eax + 4 * prcl->left; */
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mov ebx, [edx+8] /* ebx = prcl->right; */
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sub ebx, [edx] /* ebx = prcl->right - prcl->left; */
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jbe end /* if (ebx <= 0) goto end; */
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mov edx, [edx+12] /* edx = prcl->bottom; */
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sub edx, edi /* edx -= prcl->top; */
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jbe end /* if (eax <= 0) goto end; */
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mov eax, [ebp+16] /* eax = iColor; */
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cld
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for_loop: /* do { */
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mov edi, esi /* edi = pvLine0; */
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mov ecx, ebx /* ecx = cx; */
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rep stosd /* memset(pvLine0, iColor, cx); */
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add esi, [esp] /* pvLine0 += lDelta; */
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dec edx /* cy--; */
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jnz for_loop /* } while (cy > 0); */
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end:
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mov eax, 1
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add esp, 4
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pop edi
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pop esi
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pop ebx
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pop ebp
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ret
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