mirror of
https://github.com/nitraiolo/CfgUSBLoader.git
synced 2024-12-04 17:14:14 +01:00
104 lines
3.8 KiB
C
104 lines
3.8 KiB
C
/*------------------------------------------------------------------------------
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Copyright (c) 2010 The GRRLIB Team
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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------------------------------------------------------------------------------*/
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/*
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* @file GRRLIB_pixel.h
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* Inline functions for manipulating pixels in textures.
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*/
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#define _SHIFTL(v, s, w) \
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((u32) (((u32)(v) & ((0x01 << (w)) - 1)) << (s)))
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#define _SHIFTR(v, s, w) \
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((u32)(((u32)(v) >> (s)) & ((0x01 << (w)) - 1)))
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/**
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* Return the color value of a pixel from a GRRLIB_texImg.
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* @param x Specifies the x-coordinate of the pixel in the texture.
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* @param y Specifies the y-coordinate of the pixel in the texture.
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* @param tex The texture to get the color from.
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* @return The color of a pixel in RGBA format.
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*/
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INLINE
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u32 GRRLIB_GetPixelFromtexImg (const int x, const int y,
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const GRRLIB_texImg *tex) {
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register u32 offs;
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register u32 ar;
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register u8* bp = (u8*)tex->data;
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offs = (((y&(~3))<<2)*tex->w) + ((x&(~3))<<4) + ((((y&3)<<2) + (x&3)) <<1);
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ar = (u32)(*((u16*)(bp+offs )));
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return (ar<<24) | ( ((u32)(*((u16*)(bp+offs+32)))) <<8) | (ar>>8); // Wii is big-endian
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}
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/**
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* Set the color value of a pixel to a GRRLIB_texImg.
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* @see GRRLIB_FlushTex
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* @param x Specifies the x-coordinate of the pixel in the texture.
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* @param y Specifies the y-coordinate of the pixel in the texture.
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* @param tex The texture to set the color to.
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* @param color The color of the pixel in RGBA format.
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*/
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INLINE
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void GRRLIB_SetPixelTotexImg (const int x, const int y,
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GRRLIB_texImg *tex, const u32 color) {
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register u32 offs;
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register u8* bp = (u8*)tex->data;
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offs = (((y&(~3))<<2)*tex->w) + ((x&(~3))<<4) + ((((y&3)<<2) + (x&3)) <<1);
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*((u16*)(bp+offs )) = (u16)((color <<8) | (color >>24));
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*((u16*)(bp+offs+32)) = (u16) (color >>8);
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}
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/**
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* Reads a pixel directly from the FrontBuffer.
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* @param x The x-coordinate within the FB.
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* @param y The y-coordinate within the FB.
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* @return The color of a pixel in RGBA format.
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*/
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INLINE
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u32 GRRLIB_GetPixelFromFB (int x, int y) {
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u32 regval,val;
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regval = 0xc8000000|(_SHIFTL(x,2,10));
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regval = (regval&~0x3FF000)|(_SHIFTL(y,12,10));
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val = *(u32*)regval;
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return RGBA(_SHIFTR(val,16,8), _SHIFTR(val,8,8), val&0xff, _SHIFTR(val,24,8));
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}
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/**
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* Writes a pixel directly from the FrontBuffer.
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* @param x The x-coordinate within the FB.
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* @param y The y-coordinate within the FB.
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* @param pokeColor The color of the pixel in RGBA format.
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*/
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INLINE
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void GRRLIB_SetPixelToFB (int x, int y, u32 pokeColor) {
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u32 regval;
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regval = 0xc8000000|(_SHIFTL(x,2,10));
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regval = (regval&~0x3FF000)|(_SHIFTL(y,12,10));
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*(u32*)regval = _SHIFTL(A(pokeColor),24,8) | _SHIFTL(R(pokeColor),16,8) | _SHIFTL(G(pokeColor),8,8) | (B(pokeColor)&0xff);
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}
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