mirror of
https://github.com/thorvg/thorvg.git
synced 2025-06-08 13:43:43 +00:00
01b26c43a6
This is necessary for acquiring current format size. @Issue: https://github.com/thorvg/thorvg/issues/976
389 lines
11 KiB
C++
389 lines
11 KiB
C++
/*
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* Copyright (c) 2020 - 2023 the ThorVG project. All rights reserved.
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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 all
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* 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 THE
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* SOFTWARE.
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*/
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#include "tvgGlRenderer.h"
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#include "tvgGlGpuBuffer.h"
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#include "tvgGlGeometry.h"
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#include "tvgGlPropertyInterface.h"
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/************************************************************************/
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/* Internal Class Implementation */
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/************************************************************************/
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static int32_t initEngineCnt = false;
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static int32_t rendererCnt = 0;
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static void _termEngine()
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{
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if (rendererCnt > 0) return;
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//TODO: Clean up global resources
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}
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/************************************************************************/
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/* External Class Implementation */
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/************************************************************************/
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#define NOISE_LEVEL 0.5f
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bool GlRenderer::clear()
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{
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//TODO: (Request) to clear target
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// Will be adding glClearColor for input buffer
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return true;
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}
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bool GlRenderer::target(TVG_UNUSED uint32_t* buffer, uint32_t stride, uint32_t w, uint32_t h)
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{
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assert(w > 0 && h > 0);
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surface.stride = stride;
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surface.w = w;
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surface.h = h;
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return true;
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}
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bool GlRenderer::sync()
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{
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GL_CHECK(glFinish());
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GlRenderTask::unload();
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return true;
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}
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RenderRegion GlRenderer::region(TVG_UNUSED RenderData data)
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{
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return {0, 0, 0, 0};
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}
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bool GlRenderer::preRender()
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{
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if (mRenderTasks.size() == 0)
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{
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initShaders();
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}
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GlRenderTask::unload();
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// Blend function for straight alpha
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GL_CHECK(glBlendFuncSeparate(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA));
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GL_CHECK(glEnable(GL_BLEND));
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return true;
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}
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bool GlRenderer::postRender()
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{
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//TODO: called just after render()
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return true;
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}
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Compositor* GlRenderer::target(TVG_UNUSED const RenderRegion& region)
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{
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//TODO: Prepare frameBuffer & Setup render target for composition
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return nullptr;
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}
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bool GlRenderer::beginComposite(TVG_UNUSED Compositor* cmp, CompositeMethod method, uint32_t opacity)
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{
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//TODO: delete the given compositor and restore the context
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return false;
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}
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bool GlRenderer::endComposite(TVG_UNUSED Compositor* cmp)
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{
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//TODO: delete the given compositor and restore the context
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return false;
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}
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ColorSpace GlRenderer::SwRenderer::colorSpace()
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{
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return surface->cs;
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}
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bool GlRenderer::renderImage(TVG_UNUSED void* data)
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{
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//TODO: render requested images
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return false;
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}
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bool GlRenderer::renderShape(RenderData data)
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{
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auto sdata = static_cast<GlShape*>(data);
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if (!sdata) return false;
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uint8_t r = 0, g = 0, b = 0, a = 0;
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size_t flags = static_cast<size_t>(sdata->updateFlag);
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GL_CHECK(glViewport(0, 0, (GLsizei)sdata->viewWd, (GLsizei)sdata->viewHt));
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uint32_t primitiveCount = sdata->geometry->getPrimitiveCount();
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for (uint32_t i = 0; i < primitiveCount; ++i)
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{
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if (flags & (RenderUpdateFlag::Gradient | RenderUpdateFlag::Transform))
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{
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auto gradient = sdata->rshape->fill;
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if (gradient) drawPrimitive(*sdata, gradient, i, RenderUpdateFlag::Gradient);
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}
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if(flags & (RenderUpdateFlag::Color | RenderUpdateFlag::Transform))
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{
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sdata->rshape->fillColor(&r, &g, &b, &a);
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if (a > 0)
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{
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drawPrimitive(*sdata, r, g, b, a, i, RenderUpdateFlag::Color);
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}
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}
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if (flags & (RenderUpdateFlag::Stroke | RenderUpdateFlag::Transform))
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{
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sdata->rshape->strokeColor(&r, &g, &b, &a);
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if (a > 0)
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{
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drawPrimitive(*sdata, r, g, b, a, i, RenderUpdateFlag::Stroke);
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}
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}
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}
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return true;
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}
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bool GlRenderer::dispose(RenderData data)
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{
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auto sdata = static_cast<GlShape*>(data);
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if (!sdata) return false;
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delete sdata;
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return true;
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}
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RenderData GlRenderer::prepare(TVG_UNUSED Surface* surface, TVG_UNUSED const RenderMesh* mesh, TVG_UNUSED RenderData data, TVG_UNUSED const RenderTransform* transform, TVG_UNUSED uint32_t opacity, TVG_UNUSED Array<RenderData>& clips, TVG_UNUSED RenderUpdateFlag flags)
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{
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//TODO:
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return nullptr;
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}
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RenderData GlRenderer::prepare(TVG_UNUSED const Array<RenderData>& scene, TVG_UNUSED RenderData data, TVG_UNUSED const RenderTransform* transform, TVG_UNUSED uint32_t opacity, TVG_UNUSED Array<RenderData>& clips, TVG_UNUSED RenderUpdateFlag flags)
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{
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//TODO:
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return nullptr;
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}
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RenderData GlRenderer::prepare(const RenderShape& rshape, RenderData data, const RenderTransform* transform, TVG_UNUSED uint32_t opacity, Array<RenderData>& clips, RenderUpdateFlag flags, TVG_UNUSED bool clipper)
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{
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//prepare shape data
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GlShape* sdata = static_cast<GlShape*>(data);
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if (!sdata) {
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sdata = new GlShape;
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sdata->rshape = &rshape;
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}
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sdata->viewWd = static_cast<float>(surface.w);
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sdata->viewHt = static_cast<float>(surface.h);
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sdata->updateFlag = flags;
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if (sdata->updateFlag == RenderUpdateFlag::None) return sdata;
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sdata->geometry = make_unique<GlGeometry>();
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//invisible?
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uint8_t alphaF = 0, alphaS = 0;
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rshape.fillColor(nullptr, nullptr, nullptr, &alphaF);
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rshape.strokeColor(nullptr, nullptr, nullptr, &alphaS);
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auto strokeWd = rshape.strokeWidth();
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if ( ((sdata->updateFlag & RenderUpdateFlag::Gradient) == 0) &&
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((sdata->updateFlag & RenderUpdateFlag::Color) && alphaF == 0) &&
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((sdata->updateFlag & RenderUpdateFlag::Stroke) && alphaS == 0) )
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{
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return sdata;
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}
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sdata->geometry->updateTransform(transform, sdata->viewWd, sdata->viewHt);
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if (sdata->updateFlag & (RenderUpdateFlag::Color | RenderUpdateFlag::Stroke | RenderUpdateFlag::Gradient | RenderUpdateFlag::Transform) )
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{
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if (!sdata->geometry->decomposeOutline(rshape)) return sdata;
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if (!sdata->geometry->generateAAPoints(rshape, static_cast<float>(strokeWd), sdata->updateFlag)) return sdata;
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if (!sdata->geometry->tesselate(rshape, sdata->viewWd, sdata->viewHt, sdata->updateFlag)) return sdata;
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}
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return sdata;
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}
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RenderRegion GlRenderer::viewport()
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{
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return {0, 0, INT32_MAX, INT32_MAX};
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}
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bool GlRenderer::viewport(TVG_UNUSED const RenderRegion& vp)
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{
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//TODO:
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return true;
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}
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int GlRenderer::init(uint32_t threads)
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{
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if ((initEngineCnt++) > 0) return true;
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//TODO:
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return true;
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}
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int32_t GlRenderer::init()
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{
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return initEngineCnt;
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}
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int GlRenderer::term()
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{
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if ((--initEngineCnt) > 0) return true;
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initEngineCnt = 0;
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_termEngine();
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return true;
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}
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GlRenderer* GlRenderer::gen()
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{
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return new GlRenderer();
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}
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GlRenderer::~GlRenderer()
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{
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mRenderTasks.clear();
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--rendererCnt;
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if (rendererCnt == 0 && initEngineCnt == 0) _termEngine();
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}
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void GlRenderer::initShaders()
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{
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// Solid Color Renderer
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mRenderTasks.push_back(GlColorRenderTask::gen());
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// Linear Gradient Renderer
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mRenderTasks.push_back(GlLinearGradientRenderTask::gen());
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// Radial Gradient Renderer
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mRenderTasks.push_back(GlRadialGradientRenderTask::gen());
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}
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void GlRenderer::drawPrimitive(GlShape& sdata, uint8_t r, uint8_t g, uint8_t b, uint8_t a, uint32_t primitiveIndex, RenderUpdateFlag flag)
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{
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GlColorRenderTask* renderTask = static_cast<GlColorRenderTask*>(mRenderTasks[GlRenderTask::RenderTypes::RT_Color].get());
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assert(renderTask);
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renderTask->load();
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float* matrix = sdata.geometry->getTransforMatrix();
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PropertyInterface::clearData(renderTask);
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renderTask->setColor(r, g, b, a);
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renderTask->setTransform(FORMAT_SIZE_MAT_4x4, matrix);
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int32_t vertexLoc = renderTask->getLocationPropertyId();
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renderTask->uploadValues();
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sdata.geometry->draw(vertexLoc, primitiveIndex, flag);
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sdata.geometry->disableVertex(vertexLoc);
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}
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void GlRenderer::drawPrimitive(GlShape& sdata, const Fill* fill, uint32_t primitiveIndex, RenderUpdateFlag flag)
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{
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const Fill::ColorStop* stops = nullptr;
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auto stopCnt = fill->colorStops(&stops);
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if (stopCnt < 2) return;
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GlGradientRenderTask* rTask = nullptr;
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auto size = sdata.geometry->getPrimitiveSize(primitiveIndex);
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auto matrix = sdata.geometry->getTransforMatrix();
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switch (fill->identifier()) {
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case TVG_CLASS_ID_LINEAR: {
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float x1, y1, x2, y2;
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GlLinearGradientRenderTask *renderTask = static_cast<GlLinearGradientRenderTask*>(mRenderTasks[GlRenderTask::RenderTypes::RT_LinGradient].get());
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assert(renderTask);
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rTask = renderTask;
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renderTask->load();
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PropertyInterface::clearData(renderTask);
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const LinearGradient* grad = static_cast<const LinearGradient*>(fill);
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grad->linear(&x1, &y1, &x2, &y2);
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renderTask->setStartPosition(x1, y1);
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renderTask->setEndPosition(x2, y2);
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break;
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}
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case TVG_CLASS_ID_RADIAL: {
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float x1, y1, r1;
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GlRadialGradientRenderTask *renderTask = static_cast<GlRadialGradientRenderTask*>(mRenderTasks[GlRenderTask::RenderTypes::RT_RadGradient].get());
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assert(renderTask);
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rTask = renderTask;
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renderTask->load();
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PropertyInterface::clearData(renderTask);
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const RadialGradient* grad = static_cast<const RadialGradient*>(fill);
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grad->radial(&x1, &y1, &r1);
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renderTask->setStartPosition(x1, y1);
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renderTask->setStartRadius(r1);
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break;
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}
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}
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if (rTask) {
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auto vertexLoc = rTask->getLocationPropertyId();
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rTask->setPrimitveSize(size.x, size.y);
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rTask->setCanvasSize(sdata.viewWd, sdata.viewHt);
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rTask->setNoise(NOISE_LEVEL);
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rTask->setStopCount((int)stopCnt);
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rTask->setTransform(FORMAT_SIZE_MAT_4x4, matrix);
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for (uint32_t i = 0; i < stopCnt; ++i) {
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rTask->setStopColor(i, stops[i].offset, stops[i].r, stops[i].g, stops[i].b, stops[i].a);
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}
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rTask->uploadValues();
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sdata.geometry->draw(vertexLoc, primitiveIndex, flag);
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sdata.geometry->disableVertex(vertexLoc);
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}
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}
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