private static void setupShadowRenderTexture() {
if (shadowPassInterval <= 0) {
return;
}
// depth
glDeleteTextures(sfbDepthTexture);
sfbDepthTexture = glGenTextures();
glBindTexture(GL_TEXTURE_2D, sfbDepthTexture);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
ByteBuffer buffer = ByteBuffer.allocateDirect(shadowMapWidth * shadowMapHeight * 4);
glTexImage2D(
GL_TEXTURE_2D,
0,
GL_DEPTH_COMPONENT,
shadowMapWidth,
shadowMapHeight,
0,
GL_DEPTH_COMPONENT,
GL11.GL_FLOAT,
buffer);
}
private static TextureResource loadTexture(String fileName) {
String[] splitArray = fileName.split("\\.");
String ext = splitArray[splitArray.length - 1];
try {
BufferedImage image = ImageIO.read(new File("./res/textures/" + fileName));
int[] pixels =
image.getRGB(0, 0, image.getWidth(), image.getHeight(), null, 0, image.getWidth());
ByteBuffer buffer = Util.createByteBuffer(image.getHeight() * image.getWidth() * 4);
boolean hasAlpha = image.getColorModel().hasAlpha();
for (int y = 0; y < image.getHeight(); y++) {
for (int x = 0; x < image.getWidth(); x++) {
int pixel = pixels[y * image.getWidth() + x];
buffer.put((byte) ((pixel >> 16) & 0xFF));
buffer.put((byte) ((pixel >> 8) & 0xFF));
buffer.put((byte) ((pixel) & 0xFF));
if (hasAlpha) buffer.put((byte) ((pixel >> 24) & 0xFF));
else buffer.put((byte) (0xFF));
}
}
buffer.flip();
TextureResource resource = new TextureResource();
glBindTexture(GL_TEXTURE_2D, resource.getId());
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D(
GL_TEXTURE_2D,
0,
GL_RGBA8,
image.getWidth(),
image.getHeight(),
0,
GL_RGBA,
GL_UNSIGNED_BYTE,
buffer);
return resource;
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
}
return null;
}