OXYGENHUB
◆ main openmsx / src / console / OSDImageBasedWidget.cc
9.7 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
e8555c89 Andy McCall 1 
#include "OSDImageBasedWidget.hh"
2
3 
#include "OSDGUI.hh"
4 
#include "OSDTopWidget.hh"
5
6 
#include "CommandException.hh"
7 
#include "Display.hh"
8 
#include "GLImage.hh"
9 
#include "TclObject.hh"
10 
#include "Timer.hh"
11
12 
#include "narrow.hh"
13 
#include "ranges.hh"
14 
#include "stl.hh"
15 
#include "xrange.hh"
16
17 
#include <algorithm>
18 
#include <cassert>
19 
#include <cstdint>
20 
#include <ranges>
21
22 
using namespace gl;
23
24 
namespace openmsx {
25
26 
OSDImageBasedWidget::OSDImageBasedWidget(Display& display_, const TclObject& name_)
27 
	: OSDWidget(display_, name_)
28 
{
29 
	std::ranges::fill(rgba, 0x000000ff); // black, opaque
30 
}
31
32 
OSDImageBasedWidget::~OSDImageBasedWidget() = default;
33
34 
[[nodiscard]] static std::array<uint32_t, 4> get4(Interpreter& interp, const TclObject& value)
35 
{
36 
	std::array<uint32_t, 4> result;
37 
	auto len = value.getListLength(interp);
38 
	if (len == 4) {
39 
		for (auto i : xrange(4)) {
40 
			result[i] = value.getListIndex(interp, i).getInt(interp);
41 
		}
42 
	} else if (len == 1) {
43 
		std::ranges::fill(result, value.getInt(interp));
44 
	} else {
45 
		throw CommandException("Expected either 1 or 4 values.");
46 
	}
47 
	return result;
48 
}
49 
void OSDImageBasedWidget::setProperty(
50 
	Interpreter& interp, std::string_view propName, const TclObject& value)
51 
{
52 
	if (propName == "-rgba") {
53 
		std::array<uint32_t, 4> newRGBA = get4(interp, value);
54 
		setRGBA(newRGBA);
55 
	} else if (propName == "-rgb") {
56 
		std::array<uint32_t, 4> newRGB = get4(interp, value);
57 
		std::array<uint32_t, 4> newRGBA;
58 
		for (auto i : xrange(4)) {
59 
			newRGBA[i] = (rgba[i]          & 0x000000ff) |
60 
			             ((newRGB[i] << 8) & 0xffffff00);
61 
		}
62 
		setRGBA(newRGBA);
63 
	} else if (propName == "-alpha") {
64 
		std::array<uint32_t, 4> newAlpha = get4(interp, value);
65 
		std::array<uint32_t, 4> newRGBA;
66 
		for (auto i : xrange(4)) {
67 
			newRGBA[i] = (rgba[i]     & 0xffffff00) |
68 
			             (newAlpha[i] & 0x000000ff);
69 
		}
70 
		setRGBA(newRGBA);
71 
	} else if (propName == "-fadePeriod") {
72 
		updateCurrentFadeValue();
73 
		fadePeriod = value.getFloat(interp);
74 
	} else if (propName == "-fadeTarget") {
75 
		updateCurrentFadeValue();
76 
		fadeTarget = std::clamp(value.getFloat(interp), 0.0f, 1.0f);
77 
	} else if (propName == "-fadeCurrent") {
78 
		startFadeValue = std::clamp(value.getFloat(interp), 0.0f, 1.0f);
79 
		startFadeTime = Timer::getTime();
80 
	} else if (propName == "-scrollSpeed") {
81 
		scrollSpeed = std::max(0.0f, value.getFloat(interp));
82 
		startScrollTime = Timer::getTime();
83 
	} else if (propName == "-scrollPauseLeft") {
84 
		scrollPauseLeft = std::max(0.0f, value.getFloat(interp));
85 
	} else if (propName == "-scrollPauseRight") {
86 
		scrollPauseRight = std::max(0.0f, value.getFloat(interp));
87 
	} else if (propName == "-query-size") {
88 
		throw CommandException("-query-size property is readonly");
89 
	} else {
90 
		OSDWidget::setProperty(interp, propName, value);
91 
	}
92 
}
93
94 
void OSDImageBasedWidget::setRGBA(std::span<const uint32_t, 4> newRGBA)
95 
{
96 
	if (std::ranges::equal(rgba, newRGBA)) {
97 
		return; // not changed
98 
	}
99 
	invalidateLocal();
100 
	copy_to_range(newRGBA, rgba);
101 
}
102
103 
static void set4(std::span<const uint32_t, 4> rgba, uint32_t mask, unsigned shift, TclObject& result)
104 
{
105 
	if (ranges::all_equal(rgba)) {
106 
		result = (rgba[0] & mask) >> shift;
107 
	} else {
108 
		result.addListElements(std::views::transform(xrange(4), [&](auto i) {
109 
			return int((rgba[i] & mask) >> shift);
110 
		}));
111 
	}
112 
}
113 
void OSDImageBasedWidget::getProperty(std::string_view propName, TclObject& result) const
114 
{
115 
	if (propName == "-rgba") {
116 
		set4(rgba, 0xffffffff, 0, result);
117 
	} else if (propName == "-rgb") {
118 
		set4(rgba, 0xffffff00, 8, result);
119 
	} else if (propName == "-alpha") {
120 
		set4(rgba, 0x000000ff, 0, result);
121 
	} else if (propName == "-fadePeriod") {
122 
		result = fadePeriod;
123 
	} else if (propName == "-fadeTarget") {
124 
		result = fadeTarget;
125 
	} else if (propName == "-fadeCurrent") {
126 
		result = getCurrentFadeValue();
127 
	} else if (propName == "-scrollSpeed") {
128 
		result = scrollSpeed;
129 
	} else if (propName == "-scrollPauseLeft") {
130 
		result = scrollPauseLeft;
131 
	} else if (propName == "-scrollPauseRight") {
132 
		result = scrollPauseRight;
133 
	} else if (propName == "-query-size") {
134 
		auto [w, h] = getRenderedSize();
135 
		result.addListElement(w, h);
136 
	} else {
137 
		OSDWidget::getProperty(propName, result);
138 
	}
139 
}
140
141 
std::optional<float> OSDImageBasedWidget::getScrollWidth() const
142 
{
143 
        if (scrollSpeed == 0.0f) return {};
144
145 
        const auto* parentImage = dynamic_cast<const OSDImageBasedWidget*>(getParent());
146 
        if (!parentImage) return {};
147
148 
        const auto* output = getDisplay().getOutputSurface();
149 
        if (!output) return {};
150
151 
        auto [parentPos, parentSize] = parentImage->getBoundingBox(*output);
152 
        auto parentWidth = parentSize.x / narrow<float>(getScaleFactor(*output));
153
154 
        auto thisWidth = getRenderedSize().x;
155 
        auto scrollWidth = thisWidth - parentWidth;
156 
        if (scrollWidth <= 0.0f) return {};
157
158 
        return scrollWidth;
159 
}
160
161 
bool OSDImageBasedWidget::isAnimating() const
162 
{
163 
	return static_cast<bool>(getScrollWidth());
164 
}
165
166 
[[nodiscard]] static float smootherStep(float x)
167 
{
168 
	// https://en.wikipedia.org/wiki/Smoothstep
169 
	//    6x^5 - 15x^4 + 10x^3
170 
	return ((6.0f * x - 15.0f) * x + 10.0f) * x * x * x;
171 
}
172
173 
gl::vec2 OSDImageBasedWidget::getPos() const
174 
{
175 
	// get the original position, possibly this gets modified because of scrolling
176 
	auto result = OSDWidget::getPos();
177
178 
	auto width = getScrollWidth();
179 
	if (!width) return result;
180
181 
	auto scrollTime = *width / scrollSpeed;
182 
	auto animationTime = 2.0f * scrollTime + scrollPauseLeft + scrollPauseRight;
183
184 
	// transform moment in time to animation-timestamp 't'
185 
	auto now = narrow_cast<float>(Timer::getTime() - startScrollTime) / 1'000'000.0f;
186 
	auto t = fmodf(now, animationTime);
187
188 
	// transform animation timestamp to position
189 
	float relOffsetX = [&]{
190 
		if (t < scrollPauseLeft) {
191 
			// no scrolling yet, pausing at the left
192 
			return 0.0f;
193 
		} else if (t < (scrollPauseLeft + scrollTime)) {
194 
			// scrolling to the left
195 
			return smootherStep((t - scrollPauseLeft) / scrollTime);
196 
		} else if (t < (scrollPauseLeft + scrollTime + scrollPauseRight)) {
197 
			// no scrolling yet, pausing at the right
198 
			return 1.0f;
199 
		} else {
200 
			// scrolling to the right
201 
			return smootherStep(1.0f - ((t - scrollPauseLeft - scrollTime - scrollPauseRight) / scrollTime));
202 
		}
203 
	}();
204 
	result.x -= *width * relOffsetX;
205 
	return result;
206 
}
207
208 
bool OSDImageBasedWidget::hasConstantAlpha() const
209 
{
210 
	return ranges::all_equal(rgba, [](auto c) { return c & 0xff; });
211 
}
212
213 
float OSDImageBasedWidget::getRecursiveFadeValue() const
214 
{
215 
	return getParent()->getRecursiveFadeValue() * getCurrentFadeValue();
216 
}
217
218 
bool OSDImageBasedWidget::isVisible() const
219 
{
220 
	return (getFadedAlpha() != 0) || isRecursiveFading();
221 
}
222
223 
bool OSDImageBasedWidget::isFading() const
224 
{
225 
	return (startFadeValue != fadeTarget) && (fadePeriod != 0.0f);
226 
}
227
228 
bool OSDImageBasedWidget::isRecursiveFading() const
229 
{
230 
	if (isFading()) return true;
231 
	return getParent()->isRecursiveFading();
232 
}
233
234 
float OSDImageBasedWidget::getCurrentFadeValue() const
235 
{
236 
	if (!isFading()) {
237 
		return startFadeValue;
238 
	}
239 
	return getCurrentFadeValue(Timer::getTime());
240 
}
241
242 
float OSDImageBasedWidget::getCurrentFadeValue(uint64_t now) const
243 
{
244 
	assert(now >= startFadeTime);
245
246 
	auto diff = narrow<int>(now - startFadeTime); // int should be big enough
247 
	assert(fadePeriod != 0.0f);
248 
	float delta = narrow_cast<float>(diff) / (1000000.0f * fadePeriod);
249 
	if (startFadeValue < fadeTarget) {
250 
		float tmp = startFadeValue + delta;
251 
		if (tmp >= fadeTarget) {
252 
			startFadeValue = fadeTarget;
253 
			return startFadeValue;
254 
		}
255 
		return tmp;
256 
	} else {
257 
		float tmp = startFadeValue - delta;
258 
		if (tmp <= fadeTarget) {
259 
			startFadeValue = fadeTarget;
260 
			return startFadeValue;
261 
		}
262 
		return tmp;
263 
	}
264 
}
265
266 
void OSDImageBasedWidget::updateCurrentFadeValue()
267 
{
268 
	auto now = Timer::getTime();
269 
	if (isFading()) {
270 
		startFadeValue = getCurrentFadeValue(now);
271 
	}
272 
	startFadeTime = now;
273 
}
274
275 
void OSDImageBasedWidget::invalidateLocal()
276 
{
277 
	error = false;
278 
	image.reset();
279 
}
280
281 
vec2 OSDImageBasedWidget::getTransformedPos(const OutputSurface& output) const
282 
{
283 
	return getParent()->transformPos(
284 
		output, float(getScaleFactor(output)) * getPos(), getRelPos());
285 
}
286
287 
void OSDImageBasedWidget::setError(std::string message)
288 
{
289 
	error = true;
290
291 
	// The suppressErrors property only exists to break an infinite loop
292 
	// when an error occurs (e.g. couldn't load font) while displaying the
293 
	// error message on the OSD system.
294 
	// The difficulty in detecting this loop is that it's not a recursive
295 
	// loop, but each iteration takes one frame: on the CliComm Tcl callback,
296 
	// the OSD widgets get created, but only the next frame, when this new
297 
	// widget is actually drawn the next error occurs.
298 
	if (!needSuppressErrors()) {
299 
		getDisplay().getOSDGUI().getTopWidget().queueError(std::move(message));
300 
	}
301 
}
302
303 
void OSDImageBasedWidget::createImage(OutputSurface& output)
304 
{
305 
	if (!image && !hasError()) {
306 
		try {
307 
			image = create(output);
308 
		} catch (MSXException& e) {
309 
			setError(std::move(e).getMessage());
310 
		}
311 
	}
312 
}
313
314 
vec2 OSDImageBasedWidget::getRenderedSize() const
315 
{
316 
	auto* output = getDisplay().getOutputSurface();
317 
	if (!output) {
318 
		throw CommandException(
319 
			"Can't query size: no window visible");
320 
	}
321 
	// force creating image (does not yet draw it on screen)
322 
	const_cast<OSDImageBasedWidget*>(this)->createImage(*output);
323
324 
	vec2 imageSize = [&] {
325 
		if (image) {
326 
			return vec2(image->getSize());
327 
		} else {
328 
			// Couldn't be rendered, maybe an (intentionally)
329 
			// invisible rectangle
330 
			return getBoundingBox(*output).size;
331 
		}
332 
	}();
333 
	return imageSize / float(getScaleFactor(*output));
334 
}
335
336 
void OSDImageBasedWidget::paint(OutputSurface& output)
337 
{
338 
	// Note: Even when alpha == 0 we still create the image:
339 
	//    It may be needed to get the dimensions to be able to position
340 
	//    child widgets.
341 
	createImage(output);
342
343 
	if (auto fadedAlpha = getFadedAlpha();
344 
	    (fadedAlpha != 0) && image) {
345 
		ivec2 drawPos = round(getTransformedPos(output));
346 
		image->draw(drawPos, fadedAlpha);
347 
	}
348 
	if (isRecursiveFading() || isAnimating()) {
349 
		getDisplay().getOSDGUI().refresh();
350 
	}
351 
}
352
353 
} // namespace openmsx