I'm trying to make a font renderer (using java.awt) but getting error uploading texture. The texture constructor for fonts:
public Texture(ByteBuffer image, int width, int height) {
this.id = glGenTextures();
glBindTexture(GL_TEXTURE_2D, this.id);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, image);
glGenerateMipmap(GL_TEXTURE_2D);
}
Font renderer code (method of my Font class):
public IObject getStringAsObject(String string, Vector3f position) {
Rectangle2D rect = this.fontAWT.getStringBounds(string, context);
this.gfx.dispose();
this.image = new BufferedImage(
(int) Math.ceil(rect.getWidth()),
(int) Math.ceil(rect.getHeight()),
BufferedImage.TYPE_4BYTE_ABGR
);
this.gfx = image.getGraphics();
this.gfx.setColor(this.color);
this.gfx.setFont(this.fontAWT);
this.gfx.drawString(string, 0, this.gfx.getFontMetrics().getAscent());
this.gfx.dispose();
byte[] pixelData = ((DataBufferByte) this.image.getRaster().getDataBuffer()).getData();
byte[] pixelDataRGBA = pixelData;
assert pixelData.length % 4 != 0;
for(int i = 0; i < pixelData.length; i += 4) {
pixelDataRGBA[i] = pixelData[i + 3]; // r1 / r4
pixelDataRGBA[i + 1] = pixelData[i + 2]; // g2 / g3
pixelDataRGBA[i + 2] = pixelData[i + 1]; // b3 / b2
pixelDataRGBA[i + 3] = pixelData[i]; // a4 / a1
}
System.out.println(Arrays.toString(pixelDataRGBA));
System.out.println(pixelDataRGBA.length == image.getWidth() * image.getHeight() * 4); // true so opengl doesn't have to break
SimpleObject object = new SimpleObject(
position,
new Texture(ByteBuffer.wrap(pixelDataRGBA), image.getWidth(), image.getHeight()),
new Vertex[] {
new Vertex(0, 0, 0, 0, 1), // 1 triangle
new Vertex(0, (float) rect.getHeight(), 0, 0, 0),
new Vertex((float) rect.getWidth(), (float) rect.getHeight(), 0, 1, 0),
new Vertex(0, 0, 0, 0, 1), // 2 triangle
new Vertex((float) rect.getWidth(), 0, 0, 1, 1),
new Vertex((float) rect.getWidth(), (float) rect.getHeight(), 0, 1, 0)
}
);
object.model.scale(0.01f);
return object;
}
I should flip ABGR to RGBA to get colors that OpenGL can read.
And also I have this part of code: System.out.println(pixelDataRGBA.length == image.getWidth() * image.getHeight() * 4); It prints true.
IObject and SimpleObject are made by me.
Can anyone help me? EXCEPTION_ACCESS_VIOLATION (0xc0000005) at org.lwjgl.opengl.GL11C.nglTexImage2D(IIIIIIIIJ)V+0