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factor out all truecolor blending functions into their own source file
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| // | ||
| // Copyright(C) 1993-1996 Id Software, Inc. | ||
| // Copyright(C) 2005-2014 Simon Howard | ||
| // Copyright(C) 2015-2024 Fabian Greffrath | ||
| // | ||
| // 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. | ||
| // | ||
| // DESCRIPTION: | ||
| // [crispy] Truecolor rendering | ||
| // | ||
|
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| #include "config.h" | ||
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| #ifdef CRISPY_TRUECOLOR | ||
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| #include "crispy.h" | ||
| #include "i_truecolor.h" | ||
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| const uint32_t (*blendfunc) (const uint32_t fg, const uint32_t bg) = I_BlendOverTranmap; | ||
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| typedef union | ||
| { | ||
| uint32_t i; | ||
| struct { | ||
| uint8_t b; | ||
| uint8_t g; | ||
| uint8_t r; | ||
| uint8_t a; | ||
| }; | ||
| } tcpixel_t; | ||
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| const uint32_t I_BlendAdd (const uint32_t bg_i, const uint32_t fg_i) | ||
| { | ||
| tcpixel_t bg, fg, ret; | ||
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| bg.i = bg_i; | ||
| fg.i = fg_i; | ||
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| ret.a = 0xFFU; | ||
| ret.r = MIN(bg.r + fg.r, 0xFFU); | ||
| ret.g = MIN(bg.g + fg.g, 0xFFU); | ||
| ret.b = MIN(bg.b + fg.b, 0xFFU); | ||
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| return ret.i; | ||
| } | ||
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| const uint32_t I_BlendDark (const uint32_t bg_i, const int d) | ||
| { | ||
| tcpixel_t bg, ret; | ||
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| bg.i = bg_i; | ||
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| ret.a = 0xFFU; | ||
| ret.r = (bg.r * d) >> 8; | ||
| ret.g = (bg.g * d) >> 8; | ||
| ret.b = (bg.b * d) >> 8; | ||
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| return ret.i; | ||
| } | ||
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| const uint32_t I_BlendOver (const uint32_t bg_i, const uint32_t fg_i, const int amount) | ||
| { | ||
| tcpixel_t bg, fg, ret; | ||
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| bg.i = bg_i; | ||
| fg.i = fg_i; | ||
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| ret.a = 0xFFU; | ||
| ret.r = (amount * fg.r + (0XFFU - amount) * bg.r) >> 8; | ||
| ret.g = (amount * fg.g + (0XFFU - amount) * bg.g) >> 8; | ||
| ret.b = (amount * fg.b + (0XFFU - amount) * bg.b) >> 8; | ||
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| return ret.i; | ||
| } | ||
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| // [crispy] TRANMAP blending emulation, used for Doom | ||
| const uint32_t I_BlendOverTranmap (const uint32_t bg, const uint32_t fg) | ||
| { | ||
| return I_BlendOver(bg, fg, 0xA8); // 168 (66% opacity) | ||
| } | ||
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| // [crispy] TINTTAB blending emulation, used for Heretic and Hexen | ||
| const uint32_t I_BlendOverTinttab (const uint32_t bg, const uint32_t fg) | ||
| { | ||
| return I_BlendOver(bg, fg, 0x60); // 96 (38% opacity) | ||
| } | ||
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| // [crispy] More opaque ("Alt") TINTTAB blending emulation, used for Hexen's MF_ALTSHADOW drawing | ||
| const uint32_t I_BlendOverAltTinttab (const uint32_t bg, const uint32_t fg) | ||
| { | ||
| return I_BlendOver(bg, fg, 0x8E); // 142 (56% opacity) | ||
| } | ||
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| // [crispy] More opaque XLATAB blending emulation, used for Strife | ||
| const uint32_t I_BlendOverXlatab (const uint32_t bg, const uint32_t fg) | ||
| { | ||
| return I_BlendOver(bg, fg, 0xC0); // 192 (75% opacity) | ||
| } | ||
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| // [crispy] Less opaque ("Alt") XLATAB blending emulation, used for Strife | ||
| const uint32_t I_BlendOverAltXlatab (const uint32_t bg, const uint32_t fg) | ||
| { | ||
| return I_BlendOver(bg, fg, 0x40); // 64 (25% opacity) | ||
| } | ||
|
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| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,43 @@ | ||
| // | ||
| // Copyright(C) 1993-1996 Id Software, Inc. | ||
| // Copyright(C) 2005-2014 Simon Howard | ||
| // Copyright(C) 2015-2024 Fabian Greffrath | ||
| // | ||
| // 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. | ||
| // | ||
| // DESCRIPTION: | ||
| // [crispy] Truecolor rendering | ||
| // | ||
|
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| #ifndef __I_TRUECOLOR__ | ||
| #define __I_TRUECOLOR__ | ||
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| #include "config.h" | ||
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| #ifdef CRISPY_TRUECOLOR | ||
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| #include <stdint.h> | ||
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| extern const uint32_t (*blendfunc) (const uint32_t fg, const uint32_t bg); | ||
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| const uint32_t I_BlendAdd (const uint32_t bg_i, const uint32_t fg_i); | ||
| const uint32_t I_BlendDark (const uint32_t bg_i, const int d); | ||
| const uint32_t I_BlendOver (const uint32_t bg_i, const uint32_t fg_i, const int amount); | ||
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| const uint32_t I_BlendOverTranmap (const uint32_t bg, const uint32_t fg); | ||
| const uint32_t I_BlendOverTinttab (const uint32_t bg, const uint32_t fg); | ||
| const uint32_t I_BlendOverAltTinttab (const uint32_t bg, const uint32_t fg); | ||
| const uint32_t I_BlendOverXlatab (const uint32_t bg, const uint32_t fg); | ||
| const uint32_t I_BlendOverAltXlatab (const uint32_t bg, const uint32_t fg); | ||
|
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| #endif | ||
|
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| #endif |
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