#include <kinc/graphics4/texturearray.h>
#include <kinc/graphics4/textureunit.h>

#include <kinc/backend/graphics4/ogl.h>

void kinc_g4_texture_array_init(kinc_g4_texture_array_t *array, kinc_image_t *textures, int count) {
#ifdef GL_VERSION_4_2
	glGenTextures(1, &array->impl.texture);
	glBindTexture(GL_TEXTURE_2D_ARRAY, array->impl.texture);
	// glTexImage3D(GL_TEXTURE_2D_ARRAY, 0, GL_RGBA, textures[0].width, textures[0].height, count, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
	glTexStorage3D(GL_TEXTURE_2D_ARRAY, 1, GL_RGBA8, textures[0].width, textures[0].height, count);
	for (int i = 0; i < count; ++i) {
		glTexSubImage3D(GL_TEXTURE_2D_ARRAY, 0, 0, 0, i, textures[i].width, textures[i].height, 1, GL_RGBA, GL_UNSIGNED_BYTE, textures[i].data);
	}
#endif
}

void kinc_g4_texture_array_destroy(kinc_g4_texture_array_t *array) {}

void Kinc_G4_Internal_TextureArraySet(kinc_g4_texture_array_t *array, kinc_g4_texture_unit_t unit) {
#ifdef GL_VERSION_4_2
	glActiveTexture(GL_TEXTURE0 + unit.stages[KINC_G4_SHADER_TYPE_FRAGMENT]);
	glBindTexture(GL_TEXTURE_2D_ARRAY, array->impl.texture);
#endif
}