mirror of
https://github.com/love2d/love.git
synced 2026-08-16 00:02:12 +02:00
Alex Szpakowski
3a5c3df02f
- Add imagedata = love.graphics.readbackTexture(texture, [slice, mipmap, x, y, w, h, [dest, destx, desty]]). - Add readback = love.graphics.readbackTextureAsync(texture, [slice, mipmap, x, y, w, h, [dest, destx, desty]]). - Add bytedata = love.graphics.readbackBuffer(buffer, [offset, size, [dest, destoffset]]). - Add readback = ove.graphics.readbackBufferAsync(buffer, [offset, size, [dest, destoffset]]). - Deprecate Texture:newImageData. The async variants return a new GraphicsReadback object. It has the following methods: - isComplete() - hasError() - wait() - getBufferData() - getImageData() - update() (called automatically every frame by love, not normally needed). Support notes: - readbackBuffer and readbackBufferAsync require buffer copying support. - readbackTexture with a render target (canvas) is always supported. readbackTexture with a non-render-target requires copy-texture-to-buffer support. - readbackTextureAsync with a render target requires copy-render-target-to-buffer support. readbackTextureAsync with a non-render-target requires copy-texture-to-buffer support.
103 lines
2.0 KiB
C++
103 lines
2.0 KiB
C++
/**
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* Copyright (c) 2006-2022 LOVE Development Team
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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**/
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#include "FenceSync.h"
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namespace love
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{
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namespace graphics
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{
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namespace opengl
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{
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FenceSync::~FenceSync()
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{
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cleanup();
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}
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bool FenceSync::fence()
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{
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bool wasActive = sync != 0;
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if (wasActive)
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cleanup();
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sync = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, 0);
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return !wasActive;
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}
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bool FenceSync::isComplete() const
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{
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if (sync == 0)
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return true;
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GLenum status = glClientWaitSync(sync, 0, 0);
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if (status == GL_ALREADY_SIGNALED || status == GL_CONDITION_SATISFIED)
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return true;
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if (status == GL_WAIT_FAILED)
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return true;
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return false;
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}
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bool FenceSync::cpuWait()
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{
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if (sync == 0)
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return false;
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GLbitfield flags = 0;
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GLuint64 duration = 0;
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while (true)
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{
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GLenum status = glClientWaitSync(sync, flags, duration);
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if (status == GL_ALREADY_SIGNALED || status == GL_CONDITION_SATISFIED)
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break;
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if (status == GL_WAIT_FAILED)
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break;
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flags = GL_SYNC_FLUSH_COMMANDS_BIT;
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duration = 1000000000; // 1 second in nanoseconds.
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}
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cleanup();
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return true;
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}
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void FenceSync::cleanup()
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{
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if (sync != 0)
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{
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glDeleteSync(sync);
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sync = 0;
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}
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}
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} // opengl
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} // graphics
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} // love
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