mirror of
https://github.com/hrydgard/ppsspp.git
synced 2024-11-24 14:00:03 +00:00
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
// Copyright (c) 2014- PPSSPP Project.
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 2.0 or later versions.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official git repository and contact information can be found at
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// https://github.com/hrydgard/ppsspp and http://www.ppsspp.org/.
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#include "GPU/Common/StencilCommon.h"
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u8 StencilBits5551(const u8 *ptr8, u32 numPixels) {
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const u32 *ptr = (const u32 *)ptr8;
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for (u32 i = 0; i < numPixels / 2; ++i) {
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if (ptr[i] & 0x80008000) {
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return 1;
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}
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}
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return 0;
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}
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u8 StencilBits4444(const u8 *ptr8, u32 numPixels) {
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const u32 *ptr = (const u32 *)ptr8;
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u32 bits = 0;
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for (u32 i = 0; i < numPixels / 2; ++i) {
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bits |= ptr[i];
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}
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return ((bits >> 12) & 0xF) | (bits >> 28);
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}
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u8 StencilBits8888(const u8 *ptr8, u32 numPixels) {
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const u32 *ptr = (const u32 *)ptr8;
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u32 bits = 0;
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for (u32 i = 0; i < numPixels; ++i) {
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bits |= ptr[i];
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}
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return bits >> 24;
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}
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