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save/restore first frame in PGL

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This commit is contained in:
codeanticode
2015-09-26 02:05:11 -03:00
parent fd40e11180
commit 3eace673a9
2 changed files with 125 additions and 64 deletions
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68
core/src/processing/opengl/PGL.java
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@@ -125,7 +125,12 @@ public abstract class PGL {
* order to make sure the lines are always on top of the fill geometry */
protected static float STROKE_DISPLACEMENT = 0.999f;
protected static boolean DOUBLE_BUFFERED = true;
// ........................................................
// Variables to handle single-buffered situations (i.e.: Android)
protected IntBuffer firstFrame;
protected static boolean SINGLE_BUFFERED = false;
// ........................................................
@@ -698,6 +703,10 @@ public abstract class PGL {
pclearColor = clearColor;
clearColor = false;
if (SINGLE_BUFFERED && sketch.frameCount == 1) {
restoreFirstFrame();
}
if (fboLayerEnabledReq) {
fboLayerEnabled = true;
fboLayerEnabledReq = false;
@@ -708,7 +717,7 @@ public abstract class PGL {
destroyFBOLayer();
fbolayerResetReq = false;
}
if (!fboLayerCreated && DOUBLE_BUFFERED) {
if (!fboLayerCreated) {
createFBOLayer();
}
@@ -812,12 +821,17 @@ public abstract class PGL {
fboLayerEnabled = false;
fboLayerDisableReq = false;
}
} else if (!clearColor && 0 < sketch.frameCount || !sketch.isLooping()) {
enableFBOLayer();
}
} else {
if (SINGLE_BUFFERED && sketch.frameCount == 0) {
saveFirstFrame();
}
if (fboLayerEnabledReq && !fboLayerCreated && !DOUBLE_BUFFERED) {
createFBOLayer();
if (!clearColor && 0 < sketch.frameCount || !sketch.isLooping()) {
enableFBOLayer();
if (SINGLE_BUFFERED) {
createFBOLayer();
}
}
}
}
@@ -942,6 +956,46 @@ public abstract class PGL {
protected abstract void initFBOLayer();
protected void saveFirstFrame() {
firstFrame = allocateDirectIntBuffer(graphics.width * graphics.height);
readBuffer(BACK);
readPixelsImpl(0, 0, graphics.width, graphics.height, RGBA, UNSIGNED_BYTE, firstFrame);
}
protected void restoreFirstFrame() {
IntBuffer tex = allocateIntBuffer(1);
genTextures(1, tex);
int w, h;
float scale = getPixelScale();
if (hasNpotTexSupport()) {
w = (int)(scale * graphics.width);
h = (int)(scale * graphics.height);
} else {
w = nextPowerOfTwo((int)(scale * graphics.width));
h = nextPowerOfTwo((int)(scale * graphics.height));
}
bindTexture(TEXTURE_2D, tex.get(0));
texParameteri(TEXTURE_2D, TEXTURE_MIN_FILTER, NEAREST);
texParameteri(TEXTURE_2D, TEXTURE_MAG_FILTER, NEAREST);
texParameteri(TEXTURE_2D, TEXTURE_WRAP_S, CLAMP_TO_EDGE);
texParameteri(TEXTURE_2D, TEXTURE_WRAP_T, CLAMP_TO_EDGE);
texImage2D(TEXTURE_2D, 0, RGBA, w, h, 0, RGBA, UNSIGNED_BYTE, null);
texSubImage2D(TEXTURE_2D, 0, 0, 0, graphics.width, graphics.height, RGBA, UNSIGNED_BYTE, firstFrame);
drawTexture(TEXTURE_2D, tex.get(0), w, h,
0, 0, graphics.width, graphics.height,
0, 0, (int)(scale * graphics.width), (int)(scale * graphics.height),
0, 0, graphics.width, graphics.height);
deleteTextures(1, tex);
firstFrame.clear();
firstFrame = null;
}
protected void destroyFBOLayer() {
if (threadIsCurrent() && fboLayerCreated) {
deleteFramebuffers(1, glColorFbo);