processing/core/src/processing/opengl/PGL.java at master · classicist/processing · GitHub

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/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */

Part of the Processing project - http://processing.org

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation, version 2.1.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General

Public License along with this library; if not, write to the

Free Software Foundation, Inc., 59 Temple Place, Suite 330,

Boston, MA 02111-1307 USA

package processing.opengl;

import java.io.IOException;

import java.net.URL;

import java.nio.Buffer;

import java.nio.ByteBuffer;

import java.nio.ByteOrder;

import java.nio.FloatBuffer;

import java.nio.IntBuffer;

import java.nio.ShortBuffer;

import java.util.Arrays;

import java.util.regex.Pattern;

import processing.core.PApplet;

import processing.core.PConstants;

import processing.core.PGraphics;

/**

* Processing-OpenGL abstraction layer. Needs to be implemented by subclasses

* using specific OpenGL-Java bindings.

* It includes a full GLES 2.0 interface.

public abstract class PGL {

// ........................................................

// Basic fields

/** The PGraphics and PApplet objects using this interface */

protected PGraphicsOpenGL graphics;

protected PApplet sketch;

/** OpenGL thread */

protected Thread glThread;

/** ID of the GL context associated to the surface **/

protected int glContext;

/** true if this is the GL interface for a primary surface PGraphics */

public boolean primaryPGL;

// ........................................................

// Parameters

public static int REQUESTED_DEPTH_BITS = 24;

public static int REQUESTED_STENCIL_BITS = 8;

public static int REQUESTED_ALPHA_BITS = 8;

/** Switches between the use of regular and direct buffers. */

protected static boolean USE_DIRECT_BUFFERS = true;

protected static int MIN_DIRECT_BUFFER_SIZE = 1;

/** Enables/disables mipmap use. */

protected static boolean MIPMAPS_ENABLED = true;

/** Initial sizes for arrays of input and tessellated data. */

protected static int DEFAULT_IN_VERTICES = 64;

protected static int DEFAULT_IN_EDGES = 128;

protected static int DEFAULT_IN_TEXTURES = 64;

protected static int DEFAULT_TESS_VERTICES = 64;

protected static int DEFAULT_TESS_INDICES = 128;

/** Maximum lights by default is 8, the minimum defined by OpenGL. */

protected static int MAX_LIGHTS = 8;

/** Maximum index value of a tessellated vertex. GLES restricts the vertex

* indices to be of type unsigned short. Since Java only supports signed

* shorts as primitive type we have 2^15 = 32768 as the maximum number of

* vertices that can be referred to within a single VBO.

protected static int MAX_VERTEX_INDEX = 32767;

protected static int MAX_VERTEX_INDEX1 = MAX_VERTEX_INDEX + 1;

/** Count of tessellated fill, line or point vertices that will

* trigger a flush in the immediate mode. It doesn't necessarily

* be equal to MAX_VERTEX_INDEX1, since the number of vertices can

* be effectively much large since the renderer uses offsets to

* refer to vertices beyond the MAX_VERTEX_INDEX limit.

protected static int FLUSH_VERTEX_COUNT = MAX_VERTEX_INDEX1;

/** Minimum/maximum dimensions of a texture used to hold font data. */

protected static int MIN_FONT_TEX_SIZE = 256;

protected static int MAX_FONT_TEX_SIZE = 1024;

/** Minimum stroke weight needed to apply the full path stroking

* algorithm that properly generates caps and joins.

protected static float MIN_CAPS_JOINS_WEIGHT = 2f;

/** Maximum length of linear paths to be stroked with the

* full algorithm that generates accurate caps and joins.

protected static int MAX_CAPS_JOINS_LENGTH = 5000;

/** Minimum array size to use arrayCopy method(). */

protected static int MIN_ARRAYCOPY_SIZE = 2;

/** Factor used to displace the stroke vertices towards the camera in

* order to make sure the lines are always on top of the fill geometry */

protected static float STROKE_DISPLACEMENT = 0.999f;

// ........................................................

// Variables to handle single-buffered situations (i.e.: Android)

protected IntBuffer firstFrame;

protected static boolean SINGLE_BUFFERED = false;

// ........................................................

// FBO layer

protected boolean fboLayerEnabled = false;

protected boolean fboLayerCreated = false;

protected boolean fboLayerEnabledReq = false;

protected boolean fboLayerDisableReq = false;

protected boolean fbolayerResetReq = false;

public int reqNumSamples;

protected int numSamples;

protected IntBuffer glColorFbo;

protected IntBuffer glColorTex;

protected IntBuffer glDepthStencil;

protected IntBuffer glDepth;

protected IntBuffer glStencil;

protected IntBuffer glMultiFbo;

protected IntBuffer glMultiColor;

protected IntBuffer glMultiDepthStencil;

protected IntBuffer glMultiDepth;

protected IntBuffer glMultiStencil;

protected int fboWidth, fboHeight;

protected int backTex, frontTex;

/** Flags used to handle the creation of a separate front texture */

protected boolean usingFrontTex = false;

protected boolean needSepFrontTex = false;

// ........................................................

// Texture rendering

protected boolean loadedTex2DShader = false;

protected int tex2DShaderProgram;

protected int tex2DVertShader;

protected int tex2DFragShader;

protected int tex2DShaderContext;

protected int tex2DVertLoc;

protected int tex2DTCoordLoc;

protected int tex2DSamplerLoc;

protected int tex2DGeoVBO;

protected boolean loadedTexRectShader = false;

protected int texRectShaderProgram;

protected int texRectVertShader;

protected int texRectFragShader;

protected int texRectShaderContext;

protected int texRectVertLoc;

protected int texRectTCoordLoc;

protected int texRectSamplerLoc;

protected int texRectGeoVBO;

protected float[] texCoords = {

// X, Y, U, V

-1.0f, -1.0f, 0.0f, 0.0f,

+1.0f, -1.0f, 1.0f, 0.0f,

-1.0f, +1.0f, 0.0f, 1.0f,

+1.0f, +1.0f, 1.0f, 1.0f

};

protected FloatBuffer texData;

protected static final String SHADER_PREPROCESSOR_DIRECTIVE =

"#ifdef GL_ES\n" +

"precision mediump float;\n" +

"precision mediump int;\n" +

"#endif\n";

protected static String[] texVertShaderSource = {

"attribute vec2 position;",

"attribute vec2 texCoord;",

"varying vec2 vertTexCoord;",

"void main() {",

" gl_Position = vec4(position, 0, 1);",

" vertTexCoord = texCoord;",

"}"

};

protected static String[] tex2DFragShaderSource = {

SHADER_PREPROCESSOR_DIRECTIVE,

"uniform sampler2D texMap;",

"varying vec2 vertTexCoord;",

"void main() {",

" gl_FragColor = texture2D(texMap, vertTexCoord.st);",

"}"

};

protected static String[] texRectFragShaderSource = {

SHADER_PREPROCESSOR_DIRECTIVE,

"uniform sampler2DRect texMap;",

"varying vec2 vertTexCoord;",

"void main() {",

" gl_FragColor = texture2DRect(texMap, vertTexCoord.st);",

"}"

};

/** Which texturing targets are enabled */

protected boolean[] texturingTargets = { false, false };

/** Used to keep track of which textures are bound to each target */

protected int maxTexUnits;

protected int activeTexUnit = 0;

protected int[][] boundTextures;

// ........................................................

// Framerate handling

protected float targetFps = 60;

protected float currentFps = 60;

protected boolean setFps = false;

// ........................................................

// Utility buffers

protected ByteBuffer byteBuffer;

protected IntBuffer intBuffer;

protected IntBuffer viewBuffer;

protected IntBuffer colorBuffer;

protected FloatBuffer depthBuffer;

protected ByteBuffer stencilBuffer;

//........................................................

// Rendering information

/** Used to register amount of geometry rendered in each frame. */

protected int geomCount = 0;

protected int pgeomCount;

/** Used to register calls to background. */

protected boolean clearColor = false;

protected boolean pclearColor;

protected boolean clearDepth = false;

protected boolean pclearDepth;

protected boolean clearStencil = false;

protected boolean pclearStencil;

// ........................................................

// Error messages

public static final String WIKI =

" Read http://wiki.processing.org/w/OpenGL_Issues for help.";

public static final String FRAMEBUFFER_ERROR =

"Framebuffer error (%1$s), rendering will probably not work as expected" + WIKI;

public static final String MISSING_FBO_ERROR =

"Framebuffer objects are not supported by this hardware (or driver)" + WIKI;

public static final String MISSING_GLSL_ERROR =

"GLSL shaders are not supported by this hardware (or driver)" + WIKI;

public static final String MISSING_GLFUNC_ERROR =

"GL function %1$s is not available on this hardware (or driver)" + WIKI;

public static final String UNSUPPORTED_GLPROF_ERROR =

"Unsupported OpenGL profile.";

public static final String TEXUNIT_ERROR =

"Number of texture units not supported by this hardware (or driver)" + WIKI;

public static final String NONPRIMARY_ERROR =

"The renderer is trying to call a PGL function that can only be called on a primary PGL. " +

"This is most likely due to a bug in the renderer's code, please report it with an " +

"issue on Processing's github page https://github.com/processing/processing/issues?state=open " +

"if using any of the built-in OpenGL renderers. If you are using a contributed " +

"library, contact the library's developers.";

protected static final String DEPTH_READING_NOT_ENABLED_ERROR =

"Reading depth and stencil values from this multisampled buffer is not enabled. " +

"You can enable it by calling hint(ENABLE_DEPTH_READING) once. " +

"If your sketch becomes too slow, disable multisampling with noSmooth() instead.";

// ........................................................

// Constants

/** Size of different types in bytes */

protected static int SIZEOF_SHORT = Short.SIZE / 8;

protected static int SIZEOF_INT = Integer.SIZE / 8;

protected static int SIZEOF_FLOAT = Float.SIZE / 8;

protected static int SIZEOF_BYTE = Byte.SIZE / 8;

protected static int SIZEOF_INDEX = SIZEOF_SHORT;

protected static int INDEX_TYPE = 0x1403; // GL_UNSIGNED_SHORT

/** Machine Epsilon for float precision. */

protected static float FLOAT_EPS = Float.MIN_VALUE;

// Calculation of the Machine Epsilon for float precision. From:

// http://en.wikipedia.org/wiki/Machine_epsilon#Approximation_using_Java

static {

float eps = 1.0f;

do {

eps /= 2.0f;

} while ((float)(1.0 + (eps / 2.0)) != 1.0);

FLOAT_EPS = eps;

}

/**

* Set to true if the host system is big endian (PowerPC, MIPS, SPARC), false

* if little endian (x86 Intel for Mac or PC).

protected static boolean BIG_ENDIAN =

ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN;

// ........................................................

// Present mode

// ........................................................

// Present mode

protected boolean presentMode = false;

protected boolean showStopButton = true;

public float presentX;

public float presentY;

protected IntBuffer closeButtonTex;

protected int stopButtonColor;

protected int stopButtonWidth = 28;

protected int stopButtonHeight = 12;

protected int stopButtonX = 21; // The position of the close button is relative to the

protected int closeButtonY = 21; // lower left corner

protected static int[] closeButtonPix = {

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, -1, -1, -1, 0, 0, 0, -1, -1, -1, -1, -1, 0, 0, 0, -1,

-1, -1, 0, 0, 0, -1, -1, -1, -1, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, 0, -1, 0,

0, 0, 0, -1, -1, 0, -1, -1, 0, 0, -1, -1, 0, -1, -1, 0, 0, -1, 0, 0, 0, 0, 0,

0, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, -1,

-1, -1, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, -1, 0, 0, 0, -1,

0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, -1, 0, 0, -1,

0, 0, 0, -1, 0, 0, -1, 0, 0, 0, -1, 0, 0, 0, 0, -1, 0, 0, 0, 0, -1, -1, 0, -1,

-1, 0, 0, -1, -1, 0, -1, -1, 0, 0, 0, -1, -1, -1, 0, 0, 0, 0, 0, -1, -1, -1,

0, 0, 0, -1, -1, -1, 0, 0, 0, -1, -1, -1, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0, 0, 0,

0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 0, 0, 0};

///////////////////////////////////////////////////////////////

// Initialization, finalization

public PGL() { }

public PGL(PGraphicsOpenGL pg) {

this.graphics = pg;

if (glColorTex == null) {

glColorFbo = allocateIntBuffer(1);

glColorTex = allocateIntBuffer(2);

glDepthStencil = allocateIntBuffer(1);

glDepth = allocateIntBuffer(1);

glStencil = allocateIntBuffer(1);

glMultiFbo = allocateIntBuffer(1);

glMultiColor = allocateIntBuffer(1);

glMultiDepthStencil = allocateIntBuffer(1);

glMultiDepth = allocateIntBuffer(1);

glMultiStencil = allocateIntBuffer(1);

}

byteBuffer = allocateByteBuffer(1);

intBuffer = allocateIntBuffer(1);

viewBuffer = allocateIntBuffer(4);

}

public void dispose() {

destroyFBOLayer();

}

public void setPrimary(boolean primary) {

primaryPGL = primary;

}

static public int smoothToSamples(int smooth) {

if (smooth == 0) {

// smooth(0) is noSmooth(), which is 1x sampling

return 1;

} else if (smooth == 1) {

// smooth(1) means "default smoothing", which is 2x for OpenGL

return 2;

} else {

// smooth(N) can be used for 4x, 8x, etc

return smooth;

}

abstract public Object getNative();

abstract protected void setFrameRate(float fps);

abstract protected void initSurface(int antialias);

abstract protected void reinitSurface();

abstract protected void registerListeners();

protected int getReadFramebuffer() {

return fboLayerEnabled ? glColorFbo.get(0) : 0;

}

protected int getDrawFramebuffer() {

if (fboLayerEnabled) return 1 < numSamples ? glMultiFbo.get(0) :

glColorFbo.get(0);

else return 0;

}

protected int getDefaultDrawBuffer() {

return fboLayerEnabled ? COLOR_ATTACHMENT0 : BACK;

}

protected int getDefaultReadBuffer() {

return fboLayerEnabled ? COLOR_ATTACHMENT0 : FRONT;

}

protected boolean isFBOBacked() {

return fboLayerEnabled;

}

@Deprecated

public void requestFBOLayer() {

enableFBOLayer();

}

public void enableFBOLayer() {

fboLayerEnabledReq = true;

}

public void disableFBOLayer() {

fboLayerDisableReq = true;

}

public void resetFBOLayer() {

fbolayerResetReq = true;

}

protected boolean isMultisampled() {

return 1 < numSamples;

}

abstract protected int getDepthBits();

abstract protected int getStencilBits();

protected boolean getDepthTest() {

intBuffer.rewind();

getBooleanv(DEPTH_TEST, intBuffer);

return intBuffer.get(0) == 0 ? false : true;

}

protected boolean getDepthWriteMask() {

intBuffer.rewind();

getBooleanv(DEPTH_WRITEMASK, intBuffer);

return intBuffer.get(0) == 0 ? false : true;

}

protected Texture wrapBackTexture(Texture texture) {

if (texture == null) {

texture = new Texture(graphics);

texture.init(graphics.width, graphics.height,

glColorTex.get(backTex), TEXTURE_2D, RGBA,

fboWidth, fboHeight, NEAREST, NEAREST,

CLAMP_TO_EDGE, CLAMP_TO_EDGE);

texture.invertedY(true);

texture.colorBuffer(true);

graphics.setCache(graphics, texture);

} else {

texture.glName = glColorTex.get(backTex);

}

return texture;

}

protected Texture wrapFrontTexture(Texture texture) {

if (texture == null) {

texture = new Texture(graphics);

texture.init(graphics.width, graphics.height,

glColorTex.get(frontTex), TEXTURE_2D, RGBA,

fboWidth, fboHeight, NEAREST, NEAREST,

CLAMP_TO_EDGE, CLAMP_TO_EDGE);

texture.invertedY(true);

texture.colorBuffer(true);

} else {

texture.glName = glColorTex.get(frontTex);

}

return texture;

}

protected void bindFrontTexture() {

usingFrontTex = true;

if (!texturingIsEnabled(TEXTURE_2D)) {

enableTexturing(TEXTURE_2D);

}

bindTexture(TEXTURE_2D, glColorTex.get(frontTex));

}

protected void unbindFrontTexture() {

if (textureIsBound(TEXTURE_2D, glColorTex.get(frontTex))) {

// We don't want to unbind another texture

// that might be bound instead of this one.

if (!texturingIsEnabled(TEXTURE_2D)) {

enableTexturing(TEXTURE_2D);

bindTexture(TEXTURE_2D, 0);

disableTexturing(TEXTURE_2D);

} else {

bindTexture(TEXTURE_2D, 0);

}

protected void syncBackTexture() {

if (usingFrontTex) needSepFrontTex = true;

if (1 < numSamples) {

bindFramebufferImpl(READ_FRAMEBUFFER, glMultiFbo.get(0));

bindFramebufferImpl(DRAW_FRAMEBUFFER, glColorFbo.get(0));

int mask = COLOR_BUFFER_BIT;

if (graphics.getHint(PConstants.ENABLE_BUFFER_READING)) {

mask |= DEPTH_BUFFER_BIT | STENCIL_BUFFER_BIT;

}

blitFramebuffer(0, 0, fboWidth, fboHeight,

0, 0, fboWidth, fboHeight,

mask, NEAREST);

}

abstract protected float getPixelScale();

///////////////////////////////////////////////////////////

// Present mode

public void initPresentMode(float x, float y, int stopColor) {

presentMode = true;

showStopButton = stopColor != 0;

stopButtonColor = stopColor;

presentX = x;

presentY = y;

enableFBOLayer();

}

public boolean presentMode() {

return presentMode;

}

public float presentX() {

return presentX;

}

public float presentY() {

return presentY;

}

public boolean insideStopButton(float x, float y) {

if (!showStopButton) return false;

return stopButtonX < x && x < stopButtonX + stopButtonWidth &&

-(closeButtonY + stopButtonHeight) < y && y < -closeButtonY;

}

///////////////////////////////////////////////////////////

// Frame rendering

protected void clearDepthStencil() {

if (!pclearDepth && !pclearStencil) {

depthMask(true);

clearDepth(1);

clearStencil(0);

clear(DEPTH_BUFFER_BIT | STENCIL_BUFFER_BIT);

} else if (!pclearDepth) {

depthMask(true);

clearDepth(1);

clear(DEPTH_BUFFER_BIT);

} else if (!pclearStencil) {

clearStencil(0);

clear(STENCIL_BUFFER_BIT);

}

protected void clearBackground(float r, float g, float b, float a,

boolean depth, boolean stencil) {

clearColor(r, g, b, a);

if (depth && stencil) {

clearDepth(1);

clearStencil(0);

clear(DEPTH_BUFFER_BIT | STENCIL_BUFFER_BIT | COLOR_BUFFER_BIT);

if (0 < sketch.frameCount) {

clearDepth = true;

clearStencil = true;

}

} else if (depth) {

clearDepth(1);

clear(DEPTH_BUFFER_BIT | COLOR_BUFFER_BIT);

if (0 < sketch.frameCount) {

clearDepth = true;

}

} else if (stencil) {

clearStencil(0);

clear(STENCIL_BUFFER_BIT | COLOR_BUFFER_BIT);

if (0 < sketch.frameCount) {

clearStencil = true;

}

} else {

clear(PGL.COLOR_BUFFER_BIT);

}

if (0 < sketch.frameCount) {

clearColor = true;

}

protected void beginRender() {

if (sketch == null) {

sketch = graphics.parent;

}

pgeomCount = geomCount;

geomCount = 0;

pclearColor = clearColor;

clearColor = false;

pclearDepth = clearDepth;

clearDepth = false;

pclearStencil = clearStencil;

clearStencil = false;

if (SINGLE_BUFFERED && sketch.frameCount == 1) {

restoreFirstFrame();

}

if (fboLayerEnabledReq) {

fboLayerEnabled = true;

fboLayerEnabledReq = false;

}

if (fboLayerEnabled) {

if (fbolayerResetReq) {

destroyFBOLayer();

fbolayerResetReq = false;

}

if (!fboLayerCreated) {

createFBOLayer();

}

// Draw to the back texture

bindFramebufferImpl(FRAMEBUFFER, glColorFbo.get(0));

framebufferTexture2D(FRAMEBUFFER, COLOR_ATTACHMENT0,

TEXTURE_2D, glColorTex.get(backTex), 0);

if (1 < numSamples) {

bindFramebufferImpl(FRAMEBUFFER, glMultiFbo.get(0));

}

if (sketch.frameCount == 0) {

// No need to draw back color buffer because we are in the first frame.

int argb = graphics.backgroundColor;

float ba = ((argb >> 24) & 0xff) / 255.0f;

float br = ((argb >> 16) & 0xff) / 255.0f;

float bg = ((argb >> 8) & 0xff) / 255.0f;

float bb = ((argb) & 0xff) / 255.0f;

clearColor(br, bg, bb, ba);

clear(COLOR_BUFFER_BIT);

} else if (!pclearColor || !sketch.isLooping()) {

// Render previous back texture (now is the front) as background,

// because no background() is being used ("incremental drawing")

int x = 0;

int y = 0;

if (presentMode) {

x = (int)presentX;

y = (int)presentY;

}

float scale = getPixelScale();

drawTexture(TEXTURE_2D, glColorTex.get(frontTex), fboWidth, fboHeight,

x, y, graphics.width, graphics.height,

0, 0, (int)(scale * graphics.width), (int)(scale * graphics.height),

0, 0, graphics.width, graphics.height);

}

protected void endRender(int windowColor) {

if (fboLayerEnabled) {

syncBackTexture();

// Draw the contents of the back texture to the screen framebuffer.

bindFramebufferImpl(FRAMEBUFFER, 0);

if (presentMode) {

float wa = ((windowColor >> 24) & 0xff) / 255.0f;

float wr = ((windowColor >> 16) & 0xff) / 255.0f;

float wg = ((windowColor >> 8) & 0xff) / 255.0f;

float wb = (windowColor & 0xff) / 255.0f;

clearDepth(1);

clearColor(wr, wg, wb, wa);

clear(COLOR_BUFFER_BIT | DEPTH_BUFFER_BIT);

if (showStopButton) {

if (closeButtonTex == null) {

closeButtonTex = allocateIntBuffer(1);

genTextures(1, closeButtonTex);

bindTexture(TEXTURE_2D, closeButtonTex.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, stopButtonWidth, stopButtonHeight, 0, RGBA, UNSIGNED_BYTE, null);

int[] color = new int[closeButtonPix.length];

PApplet.arrayCopy(closeButtonPix, color);

// Multiply the texture by the button color

float ba = ((stopButtonColor >> 24) & 0xFF) / 255f;

float br = ((stopButtonColor >> 16) & 0xFF) / 255f;

float bg = ((stopButtonColor >> 8) & 0xFF) / 255f;

float bb = ((stopButtonColor >> 0) & 0xFF) / 255f;

for (int i = 0; i < color.length; i++) {

int c = closeButtonPix[i];

int a = (int)(ba * ((c >> 24) & 0xFF));

int r = (int)(br * ((c >> 16) & 0xFF));

int g = (int)(bg * ((c >> 8) & 0xFF));

int b = (int)(bb * ((c >> 0) & 0xFF));

color[i] = javaToNativeARGB((a << 24) | (r << 16) | (g << 8) | b);

}

IntBuffer buf = allocateIntBuffer(color);

copyToTexture(TEXTURE_2D, RGBA, closeButtonTex.get(0), 0, 0, stopButtonWidth, stopButtonHeight, buf);

bindTexture(TEXTURE_2D, 0);

}

drawTexture(TEXTURE_2D, closeButtonTex.get(0), stopButtonWidth, stopButtonHeight,

0, 0, stopButtonX + stopButtonWidth, closeButtonY + stopButtonHeight,

0, stopButtonHeight, stopButtonWidth, 0,

stopButtonX, closeButtonY, stopButtonX + stopButtonWidth, closeButtonY + stopButtonHeight);

}

} else {

clearDepth(1);

clearColor(0, 0, 0, 0);

clear(COLOR_BUFFER_BIT | DEPTH_BUFFER_BIT);

}

// Render current back texture to screen, without blending.

disable(BLEND);

int x = 0;

int y = 0;

if (presentMode) {

x = (int)presentX;

y = (int)presentY;

}

float scale = getPixelScale();

drawTexture(TEXTURE_2D, glColorTex.get(backTex),

fboWidth, fboHeight,

x, y, graphics.width, graphics.height,

0, 0, (int)(scale * graphics.width), (int)(scale * graphics.height),

0, 0, graphics.width, graphics.height);

// Swapping front and back textures.

int temp = frontTex;

frontTex = backTex;

backTex = temp;

if (fboLayerDisableReq) {

fboLayerEnabled = false;

fboLayerDisableReq = false;

}

} else {

if (SINGLE_BUFFERED && sketch.frameCount == 0) {

saveFirstFrame();

}

if (!clearColor && 0 < sketch.frameCount || !sketch.isLooping()) {

enableFBOLayer();

if (SINGLE_BUFFERED) {

createFBOLayer();

}

protected abstract void getGL(PGL pgl);

protected abstract boolean canDraw();

protected abstract void requestFocus();

protected abstract void requestDraw();

protected abstract void swapBuffers();

public boolean threadIsCurrent() {

return Thread.currentThread() == glThread;

}

public void setThread(Thread thread) {

glThread = thread;

}

protected void beginGL() { }

protected void endGL() { }

private void createFBOLayer() {

float scale = getPixelScale();

if (hasNpotTexSupport()) {

fboWidth = (int)(scale * graphics.width);

fboHeight = (int)(scale * graphics.height);

} else {

fboWidth = nextPowerOfTwo((int)(scale * graphics.width));

fboHeight = nextPowerOfTwo((int)(scale * graphics.height));

}

if (hasFboMultisampleSupport()) {

int maxs = maxSamples();

numSamples = PApplet.min(reqNumSamples, maxs);

} else {

numSamples = 1;

}

boolean multisample = 1 < numSamples;

boolean packed = hasPackedDepthStencilSupport();

int depthBits = PApplet.min(REQUESTED_DEPTH_BITS, getDepthBits());

int stencilBits = PApplet.min(REQUESTED_STENCIL_BITS, getStencilBits());

genTextures(2, glColorTex);

for (int i = 0; i < 2; i++) {

bindTexture(TEXTURE_2D, glColorTex.get(i));

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, fboWidth, fboHeight, 0,

RGBA, UNSIGNED_BYTE, null);

initTexture(TEXTURE_2D, RGBA, fboWidth, fboHeight, graphics.backgroundColor);

}

bindTexture(TEXTURE_2D, 0);

backTex = 0;

frontTex = 1;

genFramebuffers(1, glColorFbo);

bindFramebufferImpl(FRAMEBUFFER, glColorFbo.get(0));

framebufferTexture2D(FRAMEBUFFER, COLOR_ATTACHMENT0, TEXTURE_2D,

glColorTex.get(backTex), 0);

if (!multisample || graphics.getHint(PConstants.ENABLE_BUFFER_READING)) {

// If not multisampled, this is the only depth and stencil buffer.

// If multisampled and depth reading enabled, these are going to

// hold downsampled depth and stencil buffers.

createDepthAndStencilBuffer(false, depthBits, stencilBits, packed);

}

if (multisample) {

// Creating multisampled FBO

genFramebuffers(1, glMultiFbo);

bindFramebufferImpl(FRAMEBUFFER, glMultiFbo.get(0));

// color render buffer...

genRenderbuffers(1, glMultiColor);

bindRenderbuffer(RENDERBUFFER, glMultiColor.get(0));

renderbufferStorageMultisample(RENDERBUFFER, numSamples,

RGBA8, fboWidth, fboHeight);

framebufferRenderbuffer(FRAMEBUFFER, COLOR_ATTACHMENT0,

RENDERBUFFER, glMultiColor.get(0));

// Creating multisampled depth and stencil buffers

createDepthAndStencilBuffer(true, depthBits, stencilBits, packed);

}

int status = validateFramebuffer();

if (status == FRAMEBUFFER_INCOMPLETE_MULTISAMPLE && 1 < numSamples) {

System.err.println("Continuing with multisampling disabled");

reqNumSamples = 1;

destroyFBOLayer();

// try again

createFBOLayer();

return;

}

// Clear all buffers.

clearDepth(1);

clearStencil(0);

int argb = graphics.backgroundColor;

float ba = ((argb >> 24) & 0xff) / 255.0f;

float br = ((argb >> 16) & 0xff) / 255.0f;

float bg = ((argb >> 8) & 0xff) / 255.0f;

float bb = ((argb) & 0xff) / 255.0f;

clearColor(br, bg, bb, ba);

clear(DEPTH_BUFFER_BIT | STENCIL_BUFFER_BIT | COLOR_BUFFER_BIT);

bindFramebufferImpl(FRAMEBUFFER, 0);

initFBOLayer();

fboLayerCreated = true;

}

protected abstract void initFBOLayer();

protected void saveFirstFrame() {

firstFrame = allocateDirectIntBuffer(graphics.width * graphics.height);

if (hasReadBuffer()) readBuffer(BACK);

readPixelsImpl(0, 0, graphics.width, graphics.height, RGBA, UNSIGNED_BYTE, firstFrame);

}

View remainder of file in raw view

processing/core/src/processing/opengl/PGL.java at master · classicist/processing · GitHub

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