Sergii Liebodkin
45368c319e
wg_engine: introduced composition ability
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[issues 1479: Masking](#1479 )
Supported composition methods:
AlphaMask
InvAlphaMask
LumaMask
InvLumaMask
AddMask
SubtractMask
IntersectMask
DifferenceMask
Usage example:
//Solid Rectangle
auto shape = tvg::Shape::gen();
shape->appendRect(0, 0, 400, 400);
shape->fill(0, 0, 255);
//Mask
auto mask = tvg::Shape::gen();
mask->appendCircle(200, 200, 125, 125);
mask->fill(255, 255, 255); //AlphaMask RGB channels are unused.
//Nested Mask
auto nMask = tvg::Shape::gen();
nMask->appendCircle(220, 220, 125, 125);
nMask->fill(255, 255, 255); //AlphaMask RGB channels are unused.
mask->composite(std::move(nMask), tvg::CompositeMethod::AlphaMask);
shape->composite(std::move(mask), tvg::CompositeMethod::AlphaMask);
canvas->push(std::move(shape));
//Star
auto star = tvg::Shape::gen();
star->fill(80, 80, 80);
star->moveTo(599, 34);
star->lineTo(653, 143);
star->lineTo(774, 160);
star->lineTo(687, 244);
star->lineTo(707, 365);
star->lineTo(599, 309);
star->lineTo(497, 365);
star->lineTo(512, 245);
star->lineTo(426, 161);
star->lineTo(546, 143);
star->close();
star->strokeWidth(30);
star->strokeJoin(tvg::StrokeJoin::Miter);
star->strokeFill(255, 255, 255);
//Mask3
auto mask3 = tvg::Shape::gen();
mask3->appendCircle(600, 200, 125, 125);
mask3->fill(255, 255, 255); //AlphaMask RGB channels are unused.
mask3->opacity(200);
star->composite(std::move(mask3), tvg::CompositeMethod::AlphaMask);
if (canvas->push(std::move(star)) != tvg::Result::Success) return;
2024-01-15 17:33:59 +09:00
Sergii Liebodkin
8553044875
wg_engine: shape bbox based rendering (optimization)
...
Before the current changes, all surfaces were painted using a full-screen overlay, no matter how large the object was rendered. This approach is redundant and required reorganization. At the moment, all objects are rendered using an overlay equal to the box of the object itself, which reduces the cost of filling the surface.
Also surfaces and images were divided into different entities, which reduces the pressure on memory.
Also geometry data for rendering and geometry data for calculations in system memory were logically separated.
2023-12-23 13:37:56 +09:00
Sergii Liebodkin
a3adbef2c2
Added ability to draw solid strokes
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[issues 1479: Shape](https://github.com/thorvg/thorvg/issues/1479 )
In order to build you need third party libraries. Before you start please read this: [LearnWebGPU](https://eliemichel.github.io/LearnWebGPU/getting-started/hello-webgpu.html )
Usage example:
// init glfw
glfwInit();
// create a windowed mode window and its opengl context
glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
GLFWwindow* window = glfwCreateWindow(800, 800, "WebGPU base app", nullptr, nullptr);
// get window size
int width{}, height{};
glfwGetWindowSize(window, &width, &height);
// init engine webgpu
tvg::Initializer::init(tvg::CanvasEngine::Wg, 0);
// create wg canvas
auto canvasWg = tvg::WgCanvas::gen();
canvas_wg->target(glfwGetWin32Window(window), width, height);
//Test for Stroke Dash for Arc, Circle, Rect
auto shape = tvg::Shape::gen();
shape->appendArc(70, 600, 160, 10, 30, true);
shape->appendCircle(70, 700, 20, 60);
shape->appendRect(130, 710, 100, 40);
shape->strokeFill(255, 0, 0);
shape->strokeWidth(5);
shape->strokeJoin(tvg::StrokeJoin::Round);
shape->strokeCap(tvg::StrokeCap::Round);
if (canvas_wg->push(std::move(shape)) != tvg::Result::Success) return;
while (!glfwWindowShouldClose(window)) {
// webgpu
canvas_wg->draw();
canvas_wg->sync();
// pull events
glfwPollEvents();
}
// terminate engine and window
tvg::Initializer::term(tvg::CanvasEngine::Wg);
glfwDestroyWindow(window);
glfwTerminate();
2023-11-06 20:35:26 +09:00
