#include "tools/test.h"

#include <stdint.h>
#include <GL/gl.h>
#include <GL/glkos.h>


class TexImage2DTests : public test::TestCase {
public:
    uint8_t image_data[8 * 8 * 4] = {0};

    void set_up() {
        glKosInit();

        /* Init image data so each texel RGBA value matches the
         * position in the array */
        for(int i = 0; i < 8 * 8 * 4; i += 4) {
            image_data[i + 0] = i;
            image_data[i + 1] = i;
            image_data[i + 2] = i;
            image_data[i + 3] = i;
        }
    }

    void tear_down() {
        glKosShutdown();
    }

    void test_rgb_to_rgb565() {
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 8, 8, 0, GL_RGB, GL_UNSIGNED_BYTE, image_data);
        assert_equal(glGetError(), GL_NO_ERROR);

        GLint internalFormat;
        glGetIntegerv(GL_TEXTURE_INTERNAL_FORMAT_KOS, &internalFormat);

        assert_equal(internalFormat, GL_RGB565_KOS);
    }

    void test_rgb_to_rgb565_twiddle() {
        glEnable(GL_TEXTURE_TWIDDLE_KOS);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 8, 8, 0, GL_RGB, GL_UNSIGNED_BYTE, image_data);
        glDisable(GL_TEXTURE_TWIDDLE_KOS);

        assert_equal(glGetError(), GL_NO_ERROR);

        GLint internalFormat;
        glGetIntegerv(GL_TEXTURE_INTERNAL_FORMAT_KOS, &internalFormat);

        assert_equal(internalFormat, GL_RGB565_TWID_KOS);
    }

    void test_rgba_to_argb4444() {
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, image_data);
        assert_equal(glGetError(), GL_NO_ERROR);

        GLint internalFormat;
        glGetIntegerv(GL_TEXTURE_INTERNAL_FORMAT_KOS, &internalFormat);

        assert_equal(internalFormat, GL_ARGB4444_KOS);
    }

    void test_rgba_to_argb4444_twiddle() {
        glEnable(GL_TEXTURE_TWIDDLE_KOS);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 8, 8, 0, GL_RGBA, GL_UNSIGNED_BYTE, image_data);
        glDisable(GL_TEXTURE_TWIDDLE_KOS);

        assert_equal(glGetError(), GL_NO_ERROR);

        GLint internalFormat;
        glGetIntegerv(GL_TEXTURE_INTERNAL_FORMAT_KOS, &internalFormat);

        assert_equal(internalFormat, GL_ARGB4444_TWID_KOS);
    }
};