Graphics: Implement native integer scaling
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f6db7be538
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9cadb91ed1
185
src/graphics.cpp
185
src/graphics.cpp
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@ -477,6 +477,11 @@ struct GraphicsPrivate
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TEXFBO frozenScene;
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Quad screenQuad;
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Vec2i integerScaleFactor;
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TEXFBO integerScaleBuffer;
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bool integerScaleActive;
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bool integerLastMileScaling;
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/* Global list of all live Disposables
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* (disposed on reset) */
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IntruList<Disposable> dispList;
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@ -492,9 +497,18 @@ struct GraphicsPrivate
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frameCount(0),
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brightness(255),
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fpsLimiter(frameRate),
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frozen(false)
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frozen(false),
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integerScaleFactor(0, 0),
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integerScaleActive(rtData->config.integerScaling.active),
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integerLastMileScaling(rtData->config.integerScaling.lastMileScaling)
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{
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recalculateScreenSize(rtData);
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if (integerScaleActive)
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{
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integerScaleFactor = Vec2i(1, 1);
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rebuildIntegerScaleBuffer();
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}
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recalculateScreenSize(rtData->config.fixedAspectRatio);
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updateScreenResoRatio(rtData);
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TEXFBO::init(frozenScene);
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@ -510,6 +524,7 @@ struct GraphicsPrivate
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~GraphicsPrivate()
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{
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TEXFBO::fini(frozenScene);
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TEXFBO::fini(integerScaleBuffer);
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}
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void updateScreenResoRatio(RGSSThreadData *rtData)
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@ -522,16 +537,27 @@ struct GraphicsPrivate
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}
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/* Enforces fixed aspect ratio, if desired */
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void recalculateScreenSize(RGSSThreadData *rtData)
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void recalculateScreenSize(bool fixedAspectRatio)
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{
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scSize = winSize;
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if (!rtData->config.fixedAspectRatio)
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if (!fixedAspectRatio && integerLastMileScaling)
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{
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scOffset = Vec2i(0, 0);
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return;
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}
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/* Last mile scaling disabled: just center the integer scale buffer
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* inside the window space */
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if (integerScaleActive && !integerLastMileScaling)
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{
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scOffset.x = (winSize.x - scRes.x * integerScaleFactor.x) / 2;
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scOffset.y = (winSize.y - scRes.y * integerScaleFactor.y) / 2;
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scSize = Vec2i(scRes.x * integerScaleFactor.x, scRes.y * integerScaleFactor.y);
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return;
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}
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float resRatio = (float) scRes.x / scRes.y;
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float winRatio = (float) winSize.x / winSize.y;
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@ -544,10 +570,68 @@ struct GraphicsPrivate
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scOffset.y = (winSize.y - scSize.y) / 2.f;
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}
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static int findHighestFittingScale(int base, int target)
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{
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int scale = 1;
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while (base * scale <= target)
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scale += 1;
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return scale - 1;
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}
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/* Returns whether a new scale was found */
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bool findHighestIntegerScale()
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{
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Vec2i newScale(findHighestFittingScale(scRes.x, winSize.x),
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findHighestFittingScale(scRes.y, winSize.y));
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if (threadData->config.fixedAspectRatio)
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{
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/* Limit both factors to the smaller of the two */
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newScale.x = newScale.y = std::min(newScale.x, newScale.y);
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}
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if (newScale == integerScaleFactor)
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return false;
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integerScaleFactor = newScale;
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return true;
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}
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void rebuildIntegerScaleBuffer()
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{
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TEXFBO::fini(integerScaleBuffer);
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TEXFBO::init(integerScaleBuffer);
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TEXFBO::allocEmpty(integerScaleBuffer, scRes.x * integerScaleFactor.x,
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scRes.y * integerScaleFactor.y);
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TEXFBO::linkFBO(integerScaleBuffer);
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}
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bool integerScaleStepApplicable() const
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{
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if (!integerScaleActive)
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return false;
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if (integerScaleFactor.x < 1 || integerScaleFactor.y < 1) // XXX should be < 2, this is for testing only
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return false;
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return true;
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}
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void checkResize()
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{
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if (threadData->windowSizeMsg.poll(winSize))
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{
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/* Query the acutal size in pixels, not units */
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SDL_GL_GetDrawableSize(threadData->window, &winSize.x, &winSize.y);
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/* Make sure integer buffers are rebuilt before screen offsets are
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* calculated so we have the final allocated buffer size ready */
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if (integerScaleActive)
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if (findHighestIntegerScale())
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rebuildIntegerScaleBuffer();
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/* some GL drivers change the viewport on window resize */
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glState.viewport.refresh();
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recalculateScreenSize(threadData);
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@ -600,20 +684,64 @@ struct GraphicsPrivate
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void metaBlitBufferFlippedScaled()
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{
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GLMeta::blitRectangle(IntRect(0, 0, scRes.x, scRes.y),
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metaBlitBufferFlippedScaled(scRes);
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}
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void metaBlitBufferFlippedScaled(const Vec2i &sourceSize, bool forceNearestNeighbour = false)
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{
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GLMeta::blitRectangle(IntRect(0, 0, sourceSize.x, sourceSize.y),
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IntRect(scOffset.x, scSize.y+scOffset.y, scSize.x, -scSize.y),
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threadData->config.smoothScaling);
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!forceNearestNeighbour && threadData->config.smoothScaling);
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}
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void redrawScreen()
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{
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screen.composite();
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// maybe unspaghetti this later
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if (integerScaleStepApplicable() && !integerLastMileScaling)
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{
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GLMeta::blitBeginScreen(winSize);
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GLMeta::blitSource(screen.getPP().frontBuffer());
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FBO::clear();
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metaBlitBufferFlippedScaled();
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metaBlitBufferFlippedScaled(scRes, true);
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GLMeta::blitEnd();
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swapGLBuffer();
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return;
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}
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if (integerScaleStepApplicable())
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{
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assert(integerScaleBuffer.tex != TEX::ID(0));
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GLMeta::blitBegin(integerScaleBuffer);
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GLMeta::blitSource(screen.getPP().frontBuffer());
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GLMeta::blitRectangle(IntRect(0, 0, scRes.x, scRes.y),
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IntRect(0, 0, integerScaleBuffer.width, integerScaleBuffer.height),
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false);
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GLMeta::blitEnd();
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}
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GLMeta::blitBeginScreen(winSize);
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Vec2i sourceSize;
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if (integerScaleActive)
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{
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GLMeta::blitSource(integerScaleBuffer);
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sourceSize = Vec2i(integerScaleBuffer.width, integerScaleBuffer.height);
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}
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else
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{
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GLMeta::blitSource(screen.getPP().frontBuffer());
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sourceSize = scRes;
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}
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FBO::clear();
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metaBlitBufferFlippedScaled(sourceSize);
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GLMeta::blitEnd();
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@ -1026,7 +1154,48 @@ bool Graphics::getFixedAspectRatio() const
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void Graphics::setFixedAspectRatio(bool value)
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{
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shState->config().fixedAspectRatio = value;
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p->recalculateScreenSize(p->threadData);
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p->findHighestIntegerScale();
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p->recalculateScreenSize(p->threadData->config.fixedAspectRatio);
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p->updateScreenResoRatio(p->threadData);
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}
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bool Graphics::getSmoothScaling() const
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{
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// Same deal as with fixed aspect ratio
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return shState->config().smoothScaling;
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}
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void Graphics::setSmoothScaling(bool value)
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{
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shState->config().smoothScaling = value;
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}
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bool Graphics::getIntegerScaling() const
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{
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return p->integerScaleActive;
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}
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void Graphics::setIntegerScaling(bool value)
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{
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p->integerScaleActive = value;
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p->findHighestIntegerScale();
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p->rebuildIntegerScaleBuffer();
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p->recalculateScreenSize(p->threadData->config.fixedAspectRatio);
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p->updateScreenResoRatio(p->threadData);
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}
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bool Graphics::getLastMileScaling() const
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{
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return p->integerLastMileScaling;
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}
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void Graphics::setLastMileScaling(bool value)
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{
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p->integerLastMileScaling = value;
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p->recalculateScreenSize(p->threadData->config.fixedAspectRatio);
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p->updateScreenResoRatio(p->threadData);
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}
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@ -63,6 +63,9 @@ public:
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DECL_ATTR( ShowCursor, bool )
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DECL_ATTR( FixedAspectRatio, bool )
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DECL_ATTR( SmoothScaling, bool )
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DECL_ATTR( IntegerScaling, bool )
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DECL_ATTR( LastMileScaling, bool )
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/* <internal> */
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Scene *getScreen() const;
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