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v0.6.0: refactoring and improvements to EGL config chooser

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This commit is contained in:
Evan Debenham 2017-05-27 13:29:32 -04:00
parent ecde6b570d
commit a217508571
1 changed files with 52 additions and 39 deletions
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91
SPD-classes/src/main/java/com/watabou/glwrap/ScreenConfigChooser.java
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@ -28,10 +28,7 @@ import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.egl.EGLDisplay; import javax.microedition.khronos.egl.EGLDisplay;
public class ScreenConfigChooser implements GLSurfaceView.EGLConfigChooser { public class ScreenConfigChooser implements GLSurfaceView.EGLConfigChooser {
private int[] attribVals = new int[6]; //array for storing attribute values
private int[] attribPrefs = new int[6]; //array for storing attribute preferences
//array of corresponding EGL attributes for each array index //array of corresponding EGL attributes for each array index
private int[] attribEGLconsts = new int[]{ private int[] attribEGLconsts = new int[]{
EGL10.EGL_RED_SIZE, EGL10.EGL_RED_SIZE,
@ -41,7 +38,11 @@ public class ScreenConfigChooser implements GLSurfaceView.EGLConfigChooser {
EGL10.EGL_DEPTH_SIZE, EGL10.EGL_DEPTH_SIZE,
EGL10.EGL_STENCIL_SIZE EGL10.EGL_STENCIL_SIZE
}; };
private int[] desiredAttribVals = new int[attribEGLconsts.length]; //desired attribute values
private int[] attribPrefs = new int[attribEGLconsts.length]; //attribute preferences types
private int[] prefWeights = new int[attribEGLconsts.length]; //weights for preferences
//attributes with this preference are ignored //attributes with this preference are ignored
public static final int DONT_CARE = 0; public static final int DONT_CARE = 0;
@ -50,11 +51,11 @@ public class ScreenConfigChooser implements GLSurfaceView.EGLConfigChooser {
//attributes with this preference must be present in the config with at least the given value //attributes with this preference must be present in the config with at least the given value
// In the case of multiple valid configs, chooser will prefer higher values for these attributes // In the case of multiple valid configs, chooser will prefer higher values for these attributes
public static final int AT_LEAST = 2; public static final int PREF_LOW = 2;
//attributes with this preference must be present in the config with at most the given value //attributes with this preference must be present in the config with at least the given value
// In the case of multiple valid configs, chooser will prefer higher values for these attributes // In the case of multiple valid configs, chooser will prefer lower values for these attributes
public static final int AT_MOST = 3; public static final int PREF_HIGH = 3;
private EGL10 egl; private EGL10 egl;
@ -69,26 +70,30 @@ public class ScreenConfigChooser implements GLSurfaceView.EGLConfigChooser {
} }
//helper constructor for a basic config with or without depth //helper constructor for a basic config with or without depth
//and whether or not to force RGB565 for performance reasons //and whether or not to prefer RGB565 for performance reasons
//On many devices RGB565 gives slightly better performance for a minimal quality tradeoff. //On many devices RGB565 gives slightly better performance for a minimal quality tradeoff.
public ScreenConfigChooser( boolean forceRGB565, boolean depth ){ public ScreenConfigChooser( boolean prefRGB565, boolean depth ){
this( this(
new int[]{ 5, 6, 5, 0, depth ? 16 : 0, 0 } , new int[]{ 5 , 6 , 5 , 0 , depth ? 16 : 0, 0 } ,
forceRGB565 ? prefRGB565 ?
new int[]{ EXACTLY, EXACTLY, EXACTLY, EXACTLY, EXACTLY, EXACTLY } : new int[]{ PREF_LOW , PREF_LOW , PREF_LOW , EXACTLY , PREF_LOW , PREF_LOW } :
new int[]{ AT_LEAST, AT_LEAST, AT_LEAST, EXACTLY, EXACTLY, EXACTLY } new int[]{ PREF_HIGH, PREF_HIGH, PREF_HIGH, EXACTLY , PREF_LOW , PREF_LOW },
new int[]{ 2 , 2 , 2 , 1 , 1 , 1 }
); );
} }
public ScreenConfigChooser( int[] vals, int[] prefs){ public ScreenConfigChooser( int[] vals, int[] prefs, int[] weights){
if (vals.length != 6 || prefs.length != 6) if (vals.length != desiredAttribVals.length
throw new IllegalArgumentException("6 values must be entered!"); || prefs.length != attribPrefs.length
|| weights.length != prefWeights.length)
throw new IllegalArgumentException("incorrect array lengths!");
attribVals = vals; desiredAttribVals = vals;
attribPrefs = prefs; attribPrefs = prefs;
prefWeights = weights;
} }
int[] eglPrefs = new int[]{ private int[] eglPrefs = new int[]{
EGL10.EGL_RENDERABLE_TYPE, 4, //same as EGL_OPENGL_ES2_BIT. config must support GLES 2.0 EGL10.EGL_RENDERABLE_TYPE, 4, //same as EGL_OPENGL_ES2_BIT. config must support GLES 2.0
EGL10.EGL_SURFACE_TYPE, EGL10.EGL_WINDOW_BIT, EGL10.EGL_SURFACE_TYPE, EGL10.EGL_WINDOW_BIT,
EGL10.EGL_NONE EGL10.EGL_NONE
@ -121,43 +126,51 @@ public class ScreenConfigChooser implements GLSurfaceView.EGLConfigChooser {
private EGLConfig chooseConfig( EGLConfig[] configs ){ private EGLConfig chooseConfig( EGLConfig[] configs ){
EGLConfig bestConfig = null; EGLConfig bestConfig = null;
int bestConfigValue = -1; int bestConfigValue = -1;
for (EGLConfig config : configs){ for (EGLConfig curConfig : configs){
int configVal = 0; int curConfigValue = 0;
for (int i = 0; i < attribEGLconsts.length; i++){ for (int i = 0; i < attribEGLconsts.length; i++){
int val = findConfigAttrib(config, attribEGLconsts[i]); int val = findConfigAttrib(curConfig, attribEGLconsts[i]);
if (attribPrefs[i] == EXACTLY && attribVals[i] != val) { if (attribPrefs[i] == EXACTLY) {
configVal = -1;
break; if (desiredAttribVals[i] != val) {
} else if (attribPrefs[i] == AT_LEAST) { curConfigValue = Integer.MIN_VALUE;
if (attribVals[i] > val) { break;
configVal = -1; }
} else if (attribPrefs[i] == PREF_HIGH) {
if (desiredAttribVals[i] > val) {
curConfigValue = Integer.MIN_VALUE;
break; break;
} else { } else {
configVal += val; curConfigValue += prefWeights[i]*(val - desiredAttribVals[i]);
} }
} else if (attribPrefs[i] == AT_MOST) {
if (attribVals[i] < val) { } else if (attribPrefs[i] == PREF_LOW) {
configVal = -1;
if (desiredAttribVals[i] > val) {
curConfigValue = Integer.MIN_VALUE;
break; break;
} else { } else {
configVal += val; curConfigValue -= prefWeights[i]*(val - desiredAttribVals[i]);
} }
} }
} }
if (configVal > bestConfigValue){ if (curConfigValue > bestConfigValue){
bestConfigValue = configVal; bestConfigValue = curConfigValue;
bestConfig = config; bestConfig = curConfig;
} }
} }
return bestConfig; return bestConfig;
} }
int[] value = new int[1]; private int[] value = new int[1];
private int findConfigAttrib(EGLConfig config, int attribute) { private int findConfigAttrib(EGLConfig config, int attribute) {