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common picture: revise resize method.

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this implementation handles the center-aligned scale.
Also removed viewbox usage since we have size() method.
This commit is contained in:
Hermet Park 2020-12-04 18:47:29 +09:00 • committed by Hermet Park
parent 6889f0ad1f
commit 20de2bfc15
5 changed files with 41 additions and 83 deletions
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1
inc/thorvg.h
View file

@ -280,6 +280,7 @@ public:
Result load(const std::string& path) noexcept;
Result load(const char* data, uint32_t size) noexcept;
Result load(uint32_t* data, uint32_t w, uint32_t h, bool copy) noexcept;
//TODO: Replace with size(). Remove API
Result viewbox(float* x, float* y, float* w, float* h) const noexcept;
Result size(uint32_t w, uint32_t h) noexcept;

19
src/examples/MultiCanvas.cpp
View file

@ -33,24 +33,7 @@ void tvgDrawCmds(tvg::Canvas* canvas, const char* path, const char* name)
if (picture->load(buf) != tvg::Result::Success) return;
float x, y, w, h;
picture->viewbox(&x, &y, &w, &h);
float rate = (SIZE/(w > h ? w : h));
picture->scale(rate);
x *= rate;
y *= rate;
w *= rate;
h *= rate;
//Center Align ?
if (w > h) {
y -= (SIZE - h) * 0.5f;
} else {
x -= (SIZE - w) * 0.5f;
}
picture->translate(-x, -y);
picture->size(SIZE, SIZE);
if (canvas->push(move(picture)) != tvg::Result::Success) return;

23
src/examples/Stress.cpp
View file

@ -23,31 +23,14 @@ void svgDirCallback(const char* name, const char* path, void* data)
if (picture->load(buf) != tvg::Result::Success) return;
float x, y, w, h;
picture->viewbox(&x, &y, &w, &h);
float rate = (SIZE/(w > h ? w : h));
picture->scale(rate);
x *= rate;
y *= rate;
w *= rate;
h *= rate;
//Center Align ?
if (w > h) {
y -= (SIZE - h) * 0.5f;
} else {
x -= (SIZE - w) * 0.5f;
}
picture->translate((count % NUM_PER_LINE) * SIZE - x, SIZE * (count / NUM_PER_LINE) - y);
picture->size(SIZE, SIZE);
picture->translate((count % NUM_PER_LINE) * SIZE, SIZE * (count / NUM_PER_LINE));
++count;
//Duplicates
for (int i = 0; i < NUM_PER_LINE - 1; i++) {
tvg::Picture* dup = static_cast<tvg::Picture*>(picture->duplicate());
dup->translate((count % NUM_PER_LINE) * SIZE - x, SIZE * (count / NUM_PER_LINE) - y);
dup->translate((count % NUM_PER_LINE) * SIZE, SIZE * (count / NUM_PER_LINE));
pictures.push_back(dup);
++count;
}

20
src/examples/Svg2.cpp
View file

@ -21,25 +21,7 @@ void tvgDrawCmds(tvg::Canvas* canvas)
auto picture = tvg::Picture::gen();
if (picture->load(svg, strlen(svg)) != tvg::Result::Success) return;
float x, y, w, h;
picture->viewbox(&x, &y, &w, &h);
float rate = (WIDTH/(w > h ? w : h));
picture->scale(rate);
x *= rate;
y *= rate;
w *= rate;
h *= rate;
//Center Align ?
if (w > h) {
y -= (WIDTH - h) * 0.5f;
} else {
x -= (WIDTH - w) * 0.5f;
}
picture->translate(-x, -y);
picture->size(WIDTH, HEIGHT);
canvas->push(move(picture));
}

57
src/lib/tvgPictureImpl.h
View file

@ -61,33 +61,35 @@ struct Picture::Impl
void resize()
{
uint32_t w = 0, h = 0;
if (this->w != 0 && this->h != 0) {
w = this->w;
h = this->h;
}
else if (loader->w != 0 && loader->h != 0) {
w = loader->w;
h = loader->h;
}
if (w != 0 && h != 0) {
auto sx = w / (loader->vw + (loader->vx > 0 ? loader->vx : -1 * loader->vx));
auto sy = h / (loader->vh + (loader->vy > 0 ? loader->vy : -1 * loader->vy));
if (!loader->preserveAspect) {
Matrix m = {sx, 0, -loader->vx,
0, sy, -loader->vy,
0, 0, 1};
auto sx = float(w) / loader->vw;
auto sy = float(h) / loader->vh;
if (loader->preserveAspect) {
//Scale
auto scale = sx < sy ? sx : sy;
paint->scale(scale);
//Align
auto vx = loader->vx * scale;
auto vy = loader->vy * scale;
auto vw = loader->vw * scale;
auto vh = loader->vh * scale;
if (vw > vh) vy -= (float(h) - vh) * 0.5f;
else vx -= (float(w) - vw) * 0.5f;
paint->translate(-vx, -vy);
} else {
//Align
auto vx = loader->vx * sx;
auto vy = loader->vy * sy;
auto vw = loader->vw * sx;
auto vh = loader->vh * sy;
if (vw > vh) vy -= (float(h) - vh) * 0.5f;
else vx -= (float(w) - vw) * 0.5f;
Matrix m = {sx, 0, -vx, 0, sy, -vy, 0, 0, 1};
paint->transform(m);
}
else {
auto scale = sx < sy ? sx : sy;
paint->translate(((w - loader->vw) * scale) / 2.0, ((h - loader->vh) * scale) / 2.0);
paint->scale(scale);
paint->translate(-loader->vx, -loader->vy);
}
resizing = false;
}
}
uint32_t reload()
{
@ -96,8 +98,15 @@ struct Picture::Impl
auto scene = loader->scene();
if (scene) {
paint = scene.release();
resizing = true;
loader->close();
if (w == 0 && h == 0) {
w = loader->w;
h = loader->h;
} else {
resize();
}
if (paint) return RenderUpdateFlag::None;
}
}