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examples: keep aspect ratio of svg images.

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changed by 3939b61770
This commit is contained in:
Hermet Park 2023-01-07 02:19:42 +09:00
parent 5c59c9aa71
commit 4082a13527
2 changed files with 33 additions and 4 deletions
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17
src/examples/MultiCanvas.cpp
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@ -55,7 +55,22 @@ void tvgDrawCmds(tvg::Canvas* canvas, const char* path, const char* name)
if (picture->load(buf) != tvg::Result::Success) return;
picture->size(SIZE, SIZE);
//image scaling preserving its aspect ratio
float scale;
float shiftX = 0.0f, shiftY = 0.0f;
float w, h;
picture->size(&w, &h);
if (w > h) {
scale = SIZE / w;
shiftY = (SIZE - h * scale) * 0.5f;
} else {
scale = SIZE / h;
shiftX = (SIZE - w * scale) * 0.5f;
}
picture->scale(scale);
picture->translate(shiftX, shiftY);
if (canvas->push(move(picture)) != tvg::Result::Success) return;

20
src/examples/Stress.cpp
View file

@ -52,14 +52,28 @@ void svgDirCallback(const char* name, const char* path, void* data)
if (picture->load(buf) != tvg::Result::Success) return;
picture->size(SIZE, SIZE);
picture->translate((xCnt % NUM_PER_LINE) * SIZE, SIZE * (xCnt / NUM_PER_LINE));
//image scaling preserving its aspect ratio
float scale;
float shiftX = 0.0f, shiftY = 0.0f;
float w, h;
picture->size(&w, &h);
if (w > h) {
scale = SIZE / w;
shiftY = (SIZE - h * scale) * 0.5f;
} else {
scale = SIZE / h;
shiftX = (SIZE - w * scale) * 0.5f;
}
picture->scale(scale);
picture->translate((xCnt % NUM_PER_LINE) * SIZE + shiftX, SIZE * (xCnt / NUM_PER_LINE) + shiftY);
++xCnt;
//Duplicates
for (int i = 0; i < NUM_PER_LINE - 1; i++) {
tvg::Picture* dup = static_cast<tvg::Picture*>(picture->duplicate());
dup->translate((xCnt % NUM_PER_LINE) * SIZE, SIZE * (xCnt / NUM_PER_LINE));
dup->translate((xCnt % NUM_PER_LINE) * SIZE + shiftX, SIZE * (xCnt / NUM_PER_LINE) + shiftY);
pictures.push_back(dup);
++xCnt;
}