Make a counter for transparent pixels from a Bitmap in Renderscript
0
My problem is to get the amount of transparent parts/pixels in an image which is changed because of an OnTouchEvent by the user.
So I would like to transform the following java code into renderscript code:
public int transparentPixels(){
int amount = 0;
for(int x = 0; x < sourceBitmap.getWidth(); x++){
for(int y = 0; y < sourceBitmap.getHeight(); y++){
if(sourceBitmap.getPixel(x,y) == Color.TRANSPARENT){
amount += 1;
}
}
}
return amount;
}
Please add code snippets from the rs and java file.
Thanks in advance!
java
android android-renderscript asked Jan 1 at 13:30
FynnFynn
313
add a comment |
0
My problem is to get the amount of transparent parts/pixels in an image which is changed because of an OnTouchEvent by the user.
So I would like to transform the following java code into renderscript code:
public int transparentPixels(){
int amount = 0;
for(int x = 0; x < sourceBitmap.getWidth(); x++){
for(int y = 0; y < sourceBitmap.getHeight(); y++){
if(sourceBitmap.getPixel(x,y) == Color.TRANSPARENT){
amount += 1;
}
}
}
return amount;
}
Please add code snippets from the rs and java file.
Thanks in advance!
java
android android-renderscript asked Jan 1 at 13:30
FynnFynn
313
Hi Fynn, I found some problems in my old answer, I have updated it, please have a look.
– Kuanlin Chen
Jan 11 at 3:26
@KuanlinChen I tried your solution as well as the solution of winklerrr, even though it's just for counting the amount of pixel in an image. Your solution returned 0 and the the other one 1. Is there maybe a different way of live counting transparent pixels from a bitmap without using RenderScript?
– Fynn
Jan 11 at 19:05
What do you mean by "live counting" ?
– Kuanlin Chen
Jan 24 at 2:11
1
The bitmap changes all the time, because the user can draw transparent pixel on it. So my goal is to count the transparent pixel after every time the user draws on the bitmap
– Fynn
Jan 25 at 5:11
add a comment |
0
0
0
0
My problem is to get the amount of transparent parts/pixels in an image which is changed because of an OnTouchEvent by the user.
So I would like to transform the following java code into renderscript code:
public int transparentPixels(){
int amount = 0;
for(int x = 0; x < sourceBitmap.getWidth(); x++){
for(int y = 0; y < sourceBitmap.getHeight(); y++){
if(sourceBitmap.getPixel(x,y) == Color.TRANSPARENT){
amount += 1;
}
}
}
return amount;
}
Please add code snippets from the rs and java file.
Thanks in advance!
java
android android-renderscript asked Jan 1 at 13:30
FynnFynn
313
My problem is to get the amount of transparent parts/pixels in an image which is changed because of an OnTouchEvent by the user.
So I would like to transform the following java code into renderscript code:
public int transparentPixels(){
int amount = 0;
for(int x = 0; x < sourceBitmap.getWidth(); x++){
for(int y = 0; y < sourceBitmap.getHeight(); y++){
if(sourceBitmap.getPixel(x,y) == Color.TRANSPARENT){
amount += 1;
}
}
}
return amount;
}
Please add code snippets from the rs and java file.
Thanks in advance!
java
android android-renderscript java
android android-renderscript asked Jan 1 at 13:30
FynnFynn
313
asked Jan 1 at 13:30
FynnFynn
313
asked Jan 1 at 13:30
FynnFynn
313
asked Jan 1 at 13:30
FynnFynn
313
asked Jan 1 at 13:30
FynnFynn
313
313
Hi Fynn, I found some problems in my old answer, I have updated it, please have a look.
– Kuanlin Chen
Jan 11 at 3:26
@KuanlinChen I tried your solution as well as the solution of winklerrr, even though it's just for counting the amount of pixel in an image. Your solution returned 0 and the the other one 1. Is there maybe a different way of live counting transparent pixels from a bitmap without using RenderScript?
– Fynn
Jan 11 at 19:05
What do you mean by "live counting" ?
– Kuanlin Chen
Jan 24 at 2:11
1
The bitmap changes all the time, because the user can draw transparent pixel on it. So my goal is to count the transparent pixel after every time the user draws on the bitmap
– Fynn
Jan 25 at 5:11
add a comment |
Hi Fynn, I found some problems in my old answer, I have updated it, please have a look.
– Kuanlin Chen
Jan 11 at 3:26
@KuanlinChen I tried your solution as well as the solution of winklerrr, even though it's just for counting the amount of pixel in an image. Your solution returned 0 and the the other one 1. Is there maybe a different way of live counting transparent pixels from a bitmap without using RenderScript?
– Fynn
Jan 11 at 19:05
What do you mean by "live counting" ?
– Kuanlin Chen
Jan 24 at 2:11
1
The bitmap changes all the time, because the user can draw transparent pixel on it. So my goal is to count the transparent pixel after every time the user draws on the bitmap
– Fynn
Jan 25 at 5:11
Hi Fynn, I found some problems in my old answer, I have updated it, please have a look.
– Kuanlin Chen
Jan 11 at 3:26
Hi Fynn, I found some problems in my old answer, I have updated it, please have a look.
– Kuanlin Chen
Jan 11 at 3:26
@KuanlinChen I tried your solution as well as the solution of winklerrr, even though it's just for counting the amount of pixel in an image. Your solution returned 0 and the the other one 1. Is there maybe a different way of live counting transparent pixels from a bitmap without using RenderScript?
– Fynn
Jan 11 at 19:05
@KuanlinChen I tried your solution as well as the solution of winklerrr, even though it's just for counting the amount of pixel in an image. Your solution returned 0 and the the other one 1. Is there maybe a different way of live counting transparent pixels from a bitmap without using RenderScript?
– Fynn
Jan 11 at 19:05
What do you mean by "live counting" ?
– Kuanlin Chen
Jan 24 at 2:11
What do you mean by "live counting" ?
– Kuanlin Chen
Jan 24 at 2:11
1
1
The bitmap changes all the time, because the user can draw transparent pixel on it. So my goal is to count the transparent pixel after every time the user draws on the bitmap
– Fynn
Jan 25 at 5:11
The bitmap changes all the time, because the user can draw transparent pixel on it. So my goal is to count the transparent pixel after every time the user draws on the bitmap
– Fynn
Jan 25 at 5:11
add a comment |
1 Answer
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Reference: RenderScript Docs and rsAtomicInc.
Here is my sample code. Refer to winklerrr's solution here.
RSexample.rs
use in->a to retrive alpha and check its value.
#pragma version(1)
#pragma rs java_package_name(RS)
#pragma rs_fp_relaxed
int32_t count = 0;
rs_allocation rsAllocationCount;
void countPixels(uchar4* in, uint x, uint y) {
if(in->a==0)rsAtomicInc(&count);
rsSetElementAt_int(rsAllocationCount, count, 0);
}
RSContext.java
acts as context between MainActivity.java and RSexample.rs.
public void init(Context context) {
rs = RenderScript.create(context);
scriptC_RS = new ScriptC_RSexample(rs);
}
public void setup(int w, int h){
rgb888Type = Type.createXY(rs, Element.RGBA_8888(rs), w, h);
allocIn = Allocation.createTyped(rs, rgb888Type, Allocation.USAGE_SCRIPT);
allocCount = Allocation.createTyped(rs, Type.createX(rs, Element.I32(rs), 1));
}
public void addPic(Bitmap bitmap) {
allocIn = Allocation.createFromBitmap(rs, bitmap);
}
public int getCount(){
scriptC_RS.set_rsAllocationCount(allocCount);
scriptC_RS.forEach_countPixels(allocIn);
int count = new int[1];
allocIn.syncAll(Allocation.USAGE_SCRIPT);
allocCount.copyTo(count);
return count[0];
}
MainActivity.java
RSContext rsContext = new RSContext();
rsContext.init(this);
rsContext.setup(bitmap.getWidth(), bitmap.getHeight());
rsContext.addPic(bitmap);
int transparentPixel = rsContext.getCount();
answered Jan 9 at 6:12
Kuanlin ChenKuanlin Chen
3861715
add a comment |
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1 Answer
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votes
0
Reference: RenderScript Docs and rsAtomicInc.
Here is my sample code. Refer to winklerrr's solution here.
RSexample.rs
use in->a to retrive alpha and check its value.
#pragma version(1)
#pragma rs java_package_name(RS)
#pragma rs_fp_relaxed
int32_t count = 0;
rs_allocation rsAllocationCount;
void countPixels(uchar4* in, uint x, uint y) {
if(in->a==0)rsAtomicInc(&count);
rsSetElementAt_int(rsAllocationCount, count, 0);
}
RSContext.java
acts as context between MainActivity.java and RSexample.rs.
public void init(Context context) {
rs = RenderScript.create(context);
scriptC_RS = new ScriptC_RSexample(rs);
}
public void setup(int w, int h){
rgb888Type = Type.createXY(rs, Element.RGBA_8888(rs), w, h);
allocIn = Allocation.createTyped(rs, rgb888Type, Allocation.USAGE_SCRIPT);
allocCount = Allocation.createTyped(rs, Type.createX(rs, Element.I32(rs), 1));
}
public void addPic(Bitmap bitmap) {
allocIn = Allocation.createFromBitmap(rs, bitmap);
}
public int getCount(){
scriptC_RS.set_rsAllocationCount(allocCount);
scriptC_RS.forEach_countPixels(allocIn);
int count = new int[1];
allocIn.syncAll(Allocation.USAGE_SCRIPT);
allocCount.copyTo(count);
return count[0];
}
MainActivity.java
RSContext rsContext = new RSContext();
rsContext.init(this);
rsContext.setup(bitmap.getWidth(), bitmap.getHeight());
rsContext.addPic(bitmap);
int transparentPixel = rsContext.getCount();
answered Jan 9 at 6:12
Kuanlin ChenKuanlin Chen
3861715
add a comment |
0
Reference: RenderScript Docs and rsAtomicInc.
Here is my sample code. Refer to winklerrr's solution here.
RSexample.rs
use in->a to retrive alpha and check its value.
#pragma version(1)
#pragma rs java_package_name(RS)
#pragma rs_fp_relaxed
int32_t count = 0;
rs_allocation rsAllocationCount;
void countPixels(uchar4* in, uint x, uint y) {
if(in->a==0)rsAtomicInc(&count);
rsSetElementAt_int(rsAllocationCount, count, 0);
}
RSContext.java
acts as context between MainActivity.java and RSexample.rs.
public void init(Context context) {
rs = RenderScript.create(context);
scriptC_RS = new ScriptC_RSexample(rs);
}
public void setup(int w, int h){
rgb888Type = Type.createXY(rs, Element.RGBA_8888(rs), w, h);
allocIn = Allocation.createTyped(rs, rgb888Type, Allocation.USAGE_SCRIPT);
allocCount = Allocation.createTyped(rs, Type.createX(rs, Element.I32(rs), 1));
}
public void addPic(Bitmap bitmap) {
allocIn = Allocation.createFromBitmap(rs, bitmap);
}
public int getCount(){
scriptC_RS.set_rsAllocationCount(allocCount);
scriptC_RS.forEach_countPixels(allocIn);
int count = new int[1];
allocIn.syncAll(Allocation.USAGE_SCRIPT);
allocCount.copyTo(count);
return count[0];
}
MainActivity.java
RSContext rsContext = new RSContext();
rsContext.init(this);
rsContext.setup(bitmap.getWidth(), bitmap.getHeight());
rsContext.addPic(bitmap);
int transparentPixel = rsContext.getCount();
answered Jan 9 at 6:12
Kuanlin ChenKuanlin Chen
3861715
add a comment |
0
0
0
Reference: RenderScript Docs and rsAtomicInc.
Here is my sample code. Refer to winklerrr's solution here.
RSexample.rs
use in->a to retrive alpha and check its value.
#pragma version(1)
#pragma rs java_package_name(RS)
#pragma rs_fp_relaxed
int32_t count = 0;
rs_allocation rsAllocationCount;
void countPixels(uchar4* in, uint x, uint y) {
if(in->a==0)rsAtomicInc(&count);
rsSetElementAt_int(rsAllocationCount, count, 0);
}
RSContext.java
acts as context between MainActivity.java and RSexample.rs.
public void init(Context context) {
rs = RenderScript.create(context);
scriptC_RS = new ScriptC_RSexample(rs);
}
public void setup(int w, int h){
rgb888Type = Type.createXY(rs, Element.RGBA_8888(rs), w, h);
allocIn = Allocation.createTyped(rs, rgb888Type, Allocation.USAGE_SCRIPT);
allocCount = Allocation.createTyped(rs, Type.createX(rs, Element.I32(rs), 1));
}
public void addPic(Bitmap bitmap) {
allocIn = Allocation.createFromBitmap(rs, bitmap);
}
public int getCount(){
scriptC_RS.set_rsAllocationCount(allocCount);
scriptC_RS.forEach_countPixels(allocIn);
int count = new int[1];
allocIn.syncAll(Allocation.USAGE_SCRIPT);
allocCount.copyTo(count);
return count[0];
}
MainActivity.java
RSContext rsContext = new RSContext();
rsContext.init(this);
rsContext.setup(bitmap.getWidth(), bitmap.getHeight());
rsContext.addPic(bitmap);
int transparentPixel = rsContext.getCount();
answered Jan 9 at 6:12
Kuanlin ChenKuanlin Chen
3861715
Reference: RenderScript Docs and rsAtomicInc.
Here is my sample code. Refer to winklerrr's solution here.
RSexample.rs
use in->a to retrive alpha and check its value.
#pragma version(1)
#pragma rs java_package_name(RS)
#pragma rs_fp_relaxed
int32_t count = 0;
rs_allocation rsAllocationCount;
void countPixels(uchar4* in, uint x, uint y) {
if(in->a==0)rsAtomicInc(&count);
rsSetElementAt_int(rsAllocationCount, count, 0);
}
RSContext.java
acts as context between MainActivity.java and RSexample.rs.
public void init(Context context) {
rs = RenderScript.create(context);
scriptC_RS = new ScriptC_RSexample(rs);
}
public void setup(int w, int h){
rgb888Type = Type.createXY(rs, Element.RGBA_8888(rs), w, h);
allocIn = Allocation.createTyped(rs, rgb888Type, Allocation.USAGE_SCRIPT);
allocCount = Allocation.createTyped(rs, Type.createX(rs, Element.I32(rs), 1));
}
public void addPic(Bitmap bitmap) {
allocIn = Allocation.createFromBitmap(rs, bitmap);
}
public int getCount(){
scriptC_RS.set_rsAllocationCount(allocCount);
scriptC_RS.forEach_countPixels(allocIn);
int count = new int[1];
allocIn.syncAll(Allocation.USAGE_SCRIPT);
allocCount.copyTo(count);
return count[0];
}
MainActivity.java
RSContext rsContext = new RSContext();
rsContext.init(this);
rsContext.setup(bitmap.getWidth(), bitmap.getHeight());
rsContext.addPic(bitmap);
int transparentPixel = rsContext.getCount();
answered Jan 9 at 6:12
Kuanlin ChenKuanlin Chen
3861715
edited Jan 11 at 3:18
answered Jan 9 at 6:12
Kuanlin ChenKuanlin Chen
3861715
answered Jan 9 at 6:12
Kuanlin ChenKuanlin Chen
3861715
answered Jan 9 at 6:12
Kuanlin ChenKuanlin Chen
3861715
3861715
add a comment |
add a comment |
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Hi Fynn, I found some problems in my old answer, I have updated it, please have a look.
– Kuanlin Chen
Jan 11 at 3:26
@KuanlinChen I tried your solution as well as the solution of winklerrr, even though it's just for counting the amount of pixel in an image. Your solution returned 0 and the the other one 1. Is there maybe a different way of live counting transparent pixels from a bitmap without using RenderScript?
– Fynn
Jan 11 at 19:05
What do you mean by "live counting" ?
– Kuanlin Chen
Jan 24 at 2:11
1
The bitmap changes all the time, because the user can draw transparent pixel on it. So my goal is to count the transparent pixel after every time the user draws on the bitmap
– Fynn
Jan 25 at 5:11