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examples mask: revise the example code.

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Yet, this isn't work properly but it supposed to do

We need to fix alpha mask logic.
This commit is contained in:
Hermet Park 2020-12-18 19:21:34 +09:00
parent 82e3553b56
commit 87aa90c4ec
1 changed files with 44 additions and 17 deletions
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61
src/examples/Masking.cpp
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@ -11,36 +11,63 @@ void tvgDrawCmds(tvg::Canvas* canvas)
{
if (!canvas) return;
//Background
//Mask Target 2
auto scene = tvg::Scene::gen();
scene->opacity(127);
scene->scale(1.2);
scene->reserve(2);
//Star
auto shape = tvg::Shape::gen();
shape->appendRect(0, 0, WIDTH, HEIGHT, 0, 0);
shape->fill(255, 255, 255, 255);
if (canvas->push(move(shape)) != tvg::Result::Success) return;
//Appends Paths
shape->moveTo(199, 34);
shape->lineTo(253, 143);
shape->lineTo(374, 160);
shape->lineTo(287, 244);
shape->lineTo(307, 365);
shape->lineTo(199, 309);
shape->lineTo(97, 365);
shape->lineTo(112, 245);
shape->lineTo(26, 161);
shape->lineTo(146, 143);
shape->close();
shape->fill(0, 0, 255, 255);
shape->stroke(10);
shape->stroke(255, 255, 255, 255);
shape->opacity(127);
string path(EXAMPLE_DIR"/rawimage_200x300.raw");
scene->push(move(shape));
ifstream file(path);
if (!file.is_open()) return ;
data = (uint32_t*)malloc(sizeof(uint32_t) * (200*300));
//Alpha Mask
auto mask2 = tvg::Shape::gen();
mask2->appendCircle(200, 200, 125, 125);
mask2->fill(255, 255, 255, 100);
scene->composite(move(mask2), tvg::CompositeMethod::AlphaMask);
if (canvas->push(move(scene)) != tvg::Result::Success) return;
ifstream file(EXAMPLE_DIR"/rawimage_200x300.raw");
if (!file.is_open()) return;
data = (uint32_t*) malloc(sizeof(uint32_t) * (200 * 300));
file.read(reinterpret_cast<char *>(data), sizeof (data) * 200 * 300);
file.close();
//Mask Target 1
auto picture = tvg::Picture::gen();
if (picture->load(data, 200, 300, true) != tvg::Result::Success) return;
picture->translate(400, 250);
picture->translate(500, 400);
//Alpha mask
//Alpha Mask
auto mask = tvg::Shape::gen();
mask->appendCircle(500, 350, 75, 75);
mask->fill(0, 0, 0, 50);
mask->appendCircle(500, 500, 125, 125);
mask->fill(255, 255, 255, 100);
picture->composite(move(mask), tvg::CompositeMethod::AlphaMask);
if (canvas->push(move(picture)) != tvg::Result::Success) return;
auto cover = tvg::Shape::gen();
cover->appendRect(400, 250, 200, 300, 0, 0);
cover->fill(255, 255, 0, 255);
cover->composite(move(mask), tvg::CompositeMethod::AlphaMask);
if (canvas->push(move(cover)) != tvg::Result::Success) return;
}