public boolean initShader() {
int vertShader = 0, fragShader = 0;
try {
vertShader = this.createShader("./shaders/screen.vert", ARBVertexShader.GL_VERTEX_SHADER_ARB);
fragShader =
this.createShader("./shaders/screen.frag", ARBFragmentShader.GL_FRAGMENT_SHADER_ARB);
} catch (final Exception exc) {
exc.printStackTrace();
return false;
} finally {
if ((vertShader == 0) || (fragShader == 0)) {
return false;
}
}
this.program = ARBShaderObjects.glCreateProgramObjectARB();
if (this.program == 0) {
return false;
}
ARBShaderObjects.glAttachObjectARB(this.program, vertShader);
ARBShaderObjects.glAttachObjectARB(this.program, fragShader);
ARBShaderObjects.glLinkProgramARB(this.program);
if (ARBShaderObjects.glGetObjectParameteriARB(
this.program, ARBShaderObjects.GL_OBJECT_LINK_STATUS_ARB)
== GL11.GL_FALSE) {
System.err.println(this.getLogInfo(this.program));
return false;
}
ARBShaderObjects.glValidateProgramARB(this.program);
if (ARBShaderObjects.glGetObjectParameteriARB(
this.program, ARBShaderObjects.GL_OBJECT_VALIDATE_STATUS_ARB)
== GL11.GL_FALSE) {
System.err.println(this.getLogInfo(this.program));
return false;
}
return true;
}
private int createShader(final String filename, final int shaderType) throws Exception {
int shader = 0;
try {
shader = ARBShaderObjects.glCreateShaderObjectARB(shaderType);
if (shader == 0) {
return 0;
}
ARBShaderObjects.glShaderSourceARB(shader, this.readFileAsString(filename));
ARBShaderObjects.glCompileShaderARB(shader);
if (ARBShaderObjects.glGetObjectParameteriARB(
shader, ARBShaderObjects.GL_OBJECT_COMPILE_STATUS_ARB)
== GL11.GL_FALSE) {
throw new RuntimeException("Error creating shader: " + this.getLogInfo(shader));
}
return shader;
} catch (final Exception exc) {
ARBShaderObjects.glDeleteObjectARB(shader);
throw exc;
}
}
private String getLogInfo(final int obj) {
return ARBShaderObjects.glGetInfoLogARB(
obj,
ARBShaderObjects.glGetObjectParameteriARB(
obj, ARBShaderObjects.GL_OBJECT_INFO_LOG_LENGTH_ARB));
}