Framebuffer supports colour now
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parent
bbd80c4f78
commit
bcf49f4fef
2 changed files with 39 additions and 14 deletions
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@ -1,4 +1,4 @@
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;; x, y, brightness
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;; x, y, r, g, b
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putpixel:
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push ebp
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mov ebp, esp
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@ -28,12 +28,34 @@ putpixel:
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add edi, eax
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; Brightness
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mov eax, [ebp + 16]
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; Poke videomemory
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cld
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rep stosb
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xor eax, eax
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mov ebx, [ebp+16]
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mov cl, [mbootinfo.fb_rpos]
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shl ebx, cl
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or eax, ebx
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mov ebx, [ebp+20]
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mov cl, [mbootinfo.fb_gpos]
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shl ebx, cl
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or eax, ebx
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mov ebx, [ebp+24]
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mov cl, [mbootinfo.fb_bpos]
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shl ebx, cl
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or eax, ebx
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cmp [mbootinfo.fb_bpp], 32
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jne .bpp24
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stosd
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jmp .done
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.bpp24:
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stosb
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shr eax, 8
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stosb
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shr eax, 8
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stosb
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.done:
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pop edi
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pop ecx
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@ -13,7 +13,7 @@ MB_CHECKSUM equ -(MB_HEADER_MAGIC + MB_HEADER_FLAGS)
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VWIDTH equ 640
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VHEIGHT equ 480
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VDEPTH equ 24
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VDEPTH equ 32
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multiboot:
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dd MB_HEADER_MAGIC
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@ -194,12 +194,11 @@ add esp, 4
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add esp, 36 ;Clean reserved uitoa return string from stack
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; Draw a test pixel to bottom right corner
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mov eax, 0xff
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mov ebx, 767
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mov ecx, 1023
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push 0xff
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push 479
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push 639
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push 0xff
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push 0xff
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push VHEIGHT-1
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push VWIDTH-1
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call putpixel
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add esp, 3*4
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@ -210,13 +209,17 @@ rOSkalogodraw:
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mov ecx, 0 ;x
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.loop:
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lodsb
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push eax
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push ebx
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push ecx
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push eax ;b
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push eax ;g
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push eax ;r
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push ebx ;y
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push ecx ;x
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call putpixel
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pop ecx
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pop ebx
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pop eax
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pop eax
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pop eax
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inc ecx
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cmp byte cl, [roskalogo.w]
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