#include <cstdlib>
#include <cmath>
#include <pugl/pugl.h>
#include "pui.h"

#include "textures/slider1-vert.c"
#include "textures/slider1-vert-prelight.c"
#include "textures/trough1-vertical.c"
#include "textures/slider2-vert.c"
#include "textures/slider2-vert-prelight.c"
#include "textures/trough2-vertical.c"
#include "textures/knob4.c"

#include "textures/font.c"

void PTextures::BindTexture(int texture, int width, int height, const unsigned char *data, int format)
{
	glBindTexture(GL_TEXTURE_2D, tex[texture]);
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 0);
	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, format, GL_UNSIGNED_BYTE, data);

	w[texture] = width;
	h[texture] = height;
}

void PTextures::InitTextures()
{
	if (initialised) return;
	initialised = true;

	glGenTextures(TEX_END, this->tex);

	/* Texture buffer for generated textures */
	int size = 128;
	w[TEX_BACKTILE] = h[TEX_BACKTILE] = size;
	uint8_t *buffer = new uint8_t[size * size];

	/* Create background tile */
	for (int i = 0; i < size * size; i++) {
		/* Normalised noise */
		int r = 0;
		for (int j = 0; j < 4; j++) r += (rand() & 0x1F);
		buffer[i] = (r >> 2) + 0x30;
	}
	BindTexture(TEX_BACKTILE, size, size, buffer, GL_LUMINANCE);

	/* Create glow, focused at 1/3 down the window */
	int cx = size / 2;
	int cy = size / 3;
	for (int y = 0; y < size; y++) {
		for (int x = 0; x < size; x++) {
			float b = 196 - sqrtf((cx - x) * (cx - x) + (cy - y) * (cy - y)) * 256 / size;
			if (b < 0) b = 0;
			buffer[x + y * size] = b;
		}
	}
	BindTexture(TEX_BACKGLOW, size, size, buffer, GL_LUMINANCE);

	delete buffer;

	BindTexture(TEX_SLIDER1,
		slider1_vert.width,
		slider1_vert.height,
		slider1_vert.pixel_data);
	BindTexture(TEX_SLIDER1_PRE,
		slider1_vert_prelight.width,
		slider1_vert_prelight.height,
		slider1_vert_prelight.pixel_data);
	BindTexture(TEX_TROUGH1,
		trough1_vertical.width,
		trough1_vertical.height,
		trough1_vertical.pixel_data);
	BindTexture(TEX_SLIDER2,
		slider2_vert.width,
		slider2_vert.height,
		slider2_vert.pixel_data);
	BindTexture(TEX_SLIDER2_PRE,
		slider2_vert_prelight.width,
		slider2_vert_prelight.height,
		slider2_vert_prelight.pixel_data);
	BindTexture(TEX_TROUGH2,
		trough2_vertical.width,
		trough2_vertical.height,
		trough2_vertical.pixel_data);
	BindTexture(TEX_KNOB,
		knob4.width,
		knob4.height,
		knob4.pixel_data);

	this->font = new FTTextureFont(font_data, font_data_len);
//	this->font = FTGL::ftglCreateTextureFont("/usr/share/fonts/truetype/droid/DroidSans.ttf");
	this->font->FaceSize(20);
//	FTGL::ftglSetFontFaceSize(this->font, 12, 12);
}